Journal articles: 'Rotor made of solid material'

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Khankelov, Tavbay, Zokir Maksudov, Nafisa Mukhamedova, and Shavkat Tursunov. "Crushing and screening complex for the production of compost from organic components of municipal solid waste." E3S Web of Conferences 264 (2021): 01026. http://dx.doi.org/10.1051/e3sconf/202126401026.

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The existing technology for processing solid household waste (MSW) at waste transfer stations in the city of Tashkent does not allow obtaining high-quality raw materials for compost production. In this regard, a crushing and screening complex has been developed to produce compost with low energy and material consumption. The carried out theoretical and experimental studies made it possible to determine that the rotor blades should be installed along the rotor line with an angle equal to zero degrees. To overcome the resistance arising between the bottom of the crusher and the lower surface of the rotor, several holes with a diameter of 12 mm are drilled on the bottom of the crusher in the radial direction. It was found that the rotational speed of the electric motor of the crusher, as well as the sorting device, is 1500 min-1, the angle of impact of organic waste on the rotor blades of the sorting device is approximately 45 degrees. The use of a crushing and screening complex made it possible to effectively grind and extract ballast inclusions from the composition of crushed organic waste by 85-90 percent.

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Filippi, Matteo, Enrico Zappino, Erasmo Carrera, and Bruno Castanié. "Effective Static and Dynamic Finite Element Modeling of a Double Swept Composite Rotor Blade." Journal of the American Helicopter Society 65, no. 3 (July 1, 2020): 1–12. http://dx.doi.org/10.4050/jahs.65.032003.

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The paper concerns mechanical responses of helicopter blades made of composite materials. Structures with complicated geometries are modeled by using both beam and solid finite elements. The adopted one-dimensional kinematics only encompasses pure displacements; therefore, the connection with three-dimensional elements can be carried out with ease. Contributions to elastic and inertial matrices deriving from nodes shared by beams and solids are merely summed together through a standard assembling procedure. Stress, free vibration, and time response analyses have been performed on different configurations. A straight metallic rotating structure and a swept-tip blade made of an orthotropic material have been considered for verification and validation purposes. Current results have been compared with experimental data and numerical solutions available in the literature. Furthermore, a straight and a double-swept blade with a realistic airfoil have been studied. For the straight configuration, the one-dimensional results have been compared with finite element solutions obtained with commercial software. The methodology enabled complicated stress distributions and coupling phenomena to be predicted with reasonable accuracy and affordable computational efforts.

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Kovalovs, Andrejs, Evgeny Barkanov, and Sergejs Gluhihs. "ACTIVE TWIST OF MODEL ROTOR BLADES WITH D-SPAR DESIGN." TRANSPORT 22, no. 1 (March 31, 2007): 38–44. http://dx.doi.org/10.3846/16484142.2007.9638094.

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The design methodology based on the planning of experiments and response surface technique has been developed for an optimum placement of Macro Fiber Composite (MFC) actuators in the helicopter rotor blades. The baseline helicopter rotor blade consists of D‐spar made of UD GFRP, skin made of +450/‐450 GFRP, foam core, MFC actuators placement on the skin and balance weight. 3D finite element model of the rotor blade has been built by ANSYS, where the rotor blade skin and spar “moustaches” are modeled by the linear layered structural shell elements SHELL99, and the spar and foam ‐ by 3D 20‐node structural solid elements SOLID 186. The thermal analyses of 3D finite element model have been developed to investigate an active twist of the helicopter rotor blade. Strain analogy between piezoelectric strains and thermally induced strains is used to model piezoelectric effects. The optimisation results have been obtained for design solutions, connected with the application of active materials, and checked by the finite element calculations.

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A N, Prof Santosh. "Comparative Analysis of Brake Disc Materials." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (July 31, 2021): 3949–53. http://dx.doi.org/10.22214/ijraset.2021.37238.

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A brake is a device that applies artificial frictional resistance to a revolving disc in order to stop the vehicle from moving, the frictional heat created at the disc pad interface can cause high temperature during the braking period, thermal elastic stability(TEI), early wear, brake fluid vaporization (BFV), and thermally stimulated vibrations can caused by frictional heat produced on the rotor surface (TEV), better thermal stability materials will decrease these causes, we investigate the thermal and structural characteristics in this research by finite element software, the solid brake disc is made up of various materials such as titanium alloy, structured steel and gray cast iron, further we analyze the brake disc using ANSYS 16.0 and CATIA V5 is used to design the model of brake disc, for this project the heat flux calculation have been made by considering various parameters of material as well as vehicle, finally a comparison made between grey cast iron, titanium alloy and structural steel materials. With respect to equivalent stress, temperature distribution, deformation values. This paper involves selecting a best suitable material to design a brake disc which leads to better safety to passengers.

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Stefan, Vasilica, Ladislau David, Radu Ciuperca, Ana Zaica, Ancuta Nedelcu, and Albert Suvac. "Experimental testing of a helical rotor for compost distribution." E3S Web of Conferences 180 (2020): 03027. http://dx.doi.org/10.1051/e3sconf/202018003027.

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It is well known that a manure spreader must be able to apply manure consistently, effectively and uniformly over the time. An overapplying doze will cause serios environmental problems (pollution) and a sub-applying doze will not contribute to plants growth and the applying of the fertilizer will be a loss. Corroborate with others problems such as maintaining a constant tractor speed, a constant rotational speed of the rotor, a constant and continuous flow of the material make the manure spreading machines an important subject for study and continuously improving . The propose of this study is to test a vertical helicoidal rotor for manure spreading in order to improve the machine distribution uniformity. The relation between the rotor position and rotation sense is a definitory issue for the machine performance. In order to achieve a high distribution uniformity a single helical rotor is tested and a series of possible situations of placing four rotors on the machine are analyzed. The optimal solution is given by two indicators: uniformity of spreading and distribution width. The test were made with an helical rotor having the following characteristics: high=1,1 m, maximum diameter of helical spiral=0.345 m, minimum diameter of the helical spiral= 0.114m, helical pitch=0.3m, inclination angle = 15°. After analyzing four possible situations it is observe that the combination of the maximum uniformity with minimum distribution with is the optimal solution. Experimental were carried out with compost and can be repeatable with others type of solid organic fertilizers, but a new calibration should be done. It is desirable that a trapezoidal, oval or triangle pattern with uniform sloping sides to be achieved. Because most of the spreaders actually produce an oval or triangle distribution pattern it is necessary subsequent passes that increase the time for fertilization operation.

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Lyapunov, N. A., E. P. Bezuglaya, A. N. Lyapunov, I. A. Zinchenko, K. Yu Bryleva, and A. A. Lysokobilka. "LABORATORY EQUIPMENT DURING PHARMACEUTICAL DEVELOPMENT OF SEMI-SOLID PREPARATIONS." Drug development & registration 8, no. 1 (February 14, 2019): 29–36. http://dx.doi.org/10.33380/2305-2066-2019-8-1-29-36.

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Introduction. When developing drugs it is necessary to use laboratory equipment that simulates pilot and industrial equipment. For the production of semi-solid preparations the key equipment are rotor-stator dispersers and vacuum reactors-homogenizers. Aim. Investigation of the functional characteristics of laboratory equipment: Megatron® MT 1-50 dispersant SHS F/2 (Kinematica AG, Switzerland) and the RP-5 vacuum homogenizer reactor (Promvit, Ukraine). Materials and methods. During development a generic product Penciclovir cream 1% the initial particle size in suspension of penciclovir and particle size after grinding were studied by optical microscopy and laser diffraction methods. In a cream made in the reactor, the particle size of the dispersed phase of the o/w emulsion and suspension, as well as the absence of air bubbles, were determined by optical microscopy. The assay of penciclovir in 9 samples of the cream taken from the reactor-homogenizer was performed by liquid chromatography. By the of rotational viscometry method the rheological properties of the cream were studied. By the inductively coupled plasma atomic emission spectroscopy the getting of metal impurities from the disperser and the reactor-homogenizer into the suspension and cream were investigated. Results and discussion. With an increase in the rotor speed, the particle size of penciclovir in suspension decreases. The disperser effectively performs its function at a rotor speed of 25,000 rpm. In a cream made in the reactor, the deviations in the quantitative content of penciclovir from the average value in each sample are within the uncertainty of the analytical procedure, which indicates its uniform distribution. The reactor provides effective dispersion and uniform distribution of the oil phase, prevents the formation of a gas emulsion and allows getting a cream that, according to its rheological properties, corresponds to the reference preparation Fenistil® Pencivir cream 1%. In the production process metal impurities were not emitted into the suspension and the cream from the equipment. Conclusion. The disperser and the reactor during the production of cream with penciclovir are suitable for their intended use. It is rational to combine these two types of equipment at the sites for the production of semi-solid preparations. The disperser can also be used to produce emulsions with a very small particle size of the dispersed phase.

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Alqallaf, Jasem, Naser Ali, Joao A. Teixeira, and Abdulmajid Addali. "Solid Particle Erosion Behaviour and Protective Coatings for Gas Turbine Compressor Blades—A Review." Processes 8, no. 8 (August 13, 2020): 984. http://dx.doi.org/10.3390/pr8080984.

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Gas turbines (GTEs) are often utilised in harsh environments where the GT components, including compressor vanes and rotor blades, are subject to erosion damage by sand and dust particles. For instance, in a desert environment, the rate of damage made by solid particles erosion (SPE) becomes severe, and therefore results in degradation to the GTE parts, lowering the cycle efficiency, reducing the device lifetime, and increasing the overall cost of the operation. As such, understanding the erosion mechanism caused by solid particles and the effects associated with it is crucial for selecting the appropriate countermeasures and maintaining the system performance. This review paper provides a survey of the available studies on SPE effects on GTEs and surface protective coatings. Firstly, the ductile and brittle SPE mechanism is presented, as well as the ductile-brittle transition region. Then, an in-depth focus on the parameters associated with the SPE, such as particles properties and impingement conditions, is introduced. Furthermore, the existing theoretical models are shown and discussed. Afterwards, erosion resistant coating materials for surface protection and their selection criteria are covered in the review. Finally, the gap in knowledge and future research direction in the field of SPE on GTEs are provided.

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Sobczak, Krzysztof, Damian Obidowski, Piotr Reorowicz, and Emil Marchewka. "Numerical Investigations of the Savonius Turbine with Deformable Blades." Energies 13, no. 14 (July 19, 2020): 3717. http://dx.doi.org/10.3390/en13143717.

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Savonius wind turbines are characterized by various advantages such as simple design, independence of wind direction, and low noise emission, but they suffer from low efficiency. Numerous investigations were carried out to face this problem. In the present paper, a new idea of the Savonius turbine with a variable geometry of blades is proposed. Its blades, made of elastic material, were continuously deformed during the rotor revolution to increase a positive torque of the advancing blade and to decrease a negative torque of the returning blade. In order to assess the turbine aerodynamic performance, a two-dimensional numerical model was developed. The fluid-structure interaction (FSI) method was applied where blade deformations were defined by computational solid mechanics (CSM) simulations, whereas computational fluid dynamics (CFD) simulations allowed for transient flow prediction. The influence of the deformation magnitude and the position of maximally deformed blades with respect to the incoming wind direction were studied. The aerodynamic performance increased with an increase in the deformation magnitude. The power coefficient exceeded Cp = 0.30 for the eccentricity magnitude of 10% and reached 0.39 for the highest magnitude under study. It corresponded to 90% improvement in comparison to Cp = 0.21 in the case of the fixed-shape Savonius turbine.

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Binchiciu, Emilia Florina, Nicușor Alin Sîrbu, Daniela Iovănaș, Horia Binchiciu, and Romulus Pascu. "Researh on the Developments of HFIC Allied Powders." Advanced Materials Research 1153 (May 2019): 103–7. http://dx.doi.org/10.4028/www.scientific.net/amr.1153.103.

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The following paper presents the constructive manufacturing solution for low and medium allied powders in continuous flux, by melting in the caster, using high frequency induction currents - HFIC, wires, base material, and continuously discarding the melt over a rotating drum, cooled at a determined speed, thus by optimizing the movement and cooling parameters we can obtain the proper grain size.The functional model has the capability to achieve alloyed powders within a broad range of grain size, recommended in research. The melting furnace can be supplied with solid wires or tubular wires, with a fill coefficient of up to 0.55%, which allows the composite core to be integrated into the alloying system. Also, due to its high degree of flexibility, the equipment allows the HFIC melting crucible to be supplied with more than two wires at a time, a feature that ensures a high level of alloying of the powders to be achieved.The functional model developed in order to manufacture powders continuously was used to produce alloyed powders, insensible to elements burns when alloyed, by passing them, at welding, through the electric arc. Forwards we present physical-chemical characteristics of two powders destined to develop composite core from tubular wire alloyed with chromium and nickel.Repairing hot molds by the MIG molds made of low alloyed improvement steel requires type Fe-2.5% Cr-4.5W-V materials, with high homogeneity of the composite mixture from the making of powdered core of tubular wires.Repairing the semi-mechanized rotors made of martensitic steels from hydropower plants requires tubular (cored) wires that deposit type Fe-12% Cr-4% Ni alloys, possibly even Mo.

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DMITRAK, Yuri. "THE MAIN SCIENTIFIC ACTIVITY TRENDS OF NORTH CAUCASIAN INSTITUTE OF MINING AND METALLURGY (STATE TECHNOLOGICAL UNIVERSITY) IN THE STUDY AND SOLUTION OF THE PROBLEM OF COMPLEX AND ENVIRONMENTALLY SAFE PROCESSING OF NATURAL AND TECHNOGENIC MINERAL RAW MATERIALS." Sustainable Development of Mountain Territories 13, no. 2 (June 30, 2021): 304–32. http://dx.doi.org/10.21177/1998-4502-2021-13-2-304-332.

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The result of many years research of the university scientific community in the field of topical issues of complex processing of natural and man-made mineral raw materials was the creation of a scientific school “Dynamics of working bodies of machines and equipment for fine grinding of rocks” under the leadership of Professor Dmitrak Yu. V. Research results. The dynamic parameters of the grinding bodies are determined directly in the mill grinding chamber which ensure the contactless transmission of information from the grinding ball to the receiving device. A new method of materials self-grinding and the design of a vertical centrifugal mill based on it has been developed. The mill tests during the grinding waste from the production of ceramic products (the battle of insulators, crushed mullite bricks) showed high efficiency and prospects. The tests of a laboratory vibrating mill with one grinding chamber and a rotor diameter of 250 mm for grinding dolomite were carried out. The experiments have shown the possibility of creating vibrating mills for solid materials grinding. In the development of the work of I. N. Plaksin on the flotation of ores with the jet movement of products in the scheme tested by him together with employees in the conditions of the Tekeli processing plant, the modes of joint processing of ores and gold placers were developed at the NCIMM (GTU). It was established that with the unprofitable individual development of alluvial gold mining waste, a positive economic effect can be obtained through their joint processing with ore gold reserves by fine-tuning the concentrate extracted from man-made raw materials by gravitational enrichment methods at a stationary processing plant. It is proved that the addition of the gravitational technology of alluvial gold extraction by flotation methods provides an increase in annual gold production by ~38 % due to the additional extraction of “resistant” forms of gold for gravitational methods. It has been proved in laboratory conditions that the waste slag of the Copper plant of “Ltd. MMP Norilsk Nickel” can be disposed of by joint processing with the ore of current production. It is established that the technology development using metal leaching is promising for the development of Sadonsky plant deposits.

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Pyrhonen, J. "Calculating the effects of solid-rotor material on high-speed induction motor characteristics." European Transactions on Electrical Power 1, no. 6 (September 6, 2007): 301–10. http://dx.doi.org/10.1002/etep.4450010602.

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Ren, J. Q., and Y. B. Xie. "Design and test of a solid material damper for a rotor bearing system." Tribology International 22, no. 5 (October 1989): 315–19. http://dx.doi.org/10.1016/0301-679x(89)90146-1.

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Setiawan, A., M. M. Al Gifari, and I. Hamidah. "Performance of LLBC-based rotor blade for low speed wind turbine." MATEC Web of Conferences 197 (2018): 08004. http://dx.doi.org/10.1051/matecconf/201819708004.

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The development of wind turbine attracts more attention as a renewable energy that supports green technology. Layer Laminated Bamboo Composite (LLBC) is a bio-composite with bamboo base material which is abundant material and has a relatively lower price. Therefore, LLBC is a prospective material for rotor blades of low speed wind turbine. This study investigates the performance of the LLBC-based rotor blades that have been successfully made previously. This research uses experimental method. Performance of the LLBC-based rotor blades is tested by wind tunnel experiment and then compared with the fiber-based rotor blade available in market. The results showed that the LLBC-based rotor blades require wind speed of 4.6 m/s to start rotation, while for the fiber-based rotor blades requires wind speed of 4.7 m/s. Electrical power generated by the LLBC-blade is still lower than generated by standard blade (fiberglass). At wind speed of 8 m/s, a vibration occurs that reduce performance of the blades. We conclude that LLBC is a potential material for rotor blades of low-speed wind turbine.

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Smółka, Krzysztof, and Zbigniew Gmyrek. "Dynamics of the line-start reluctance motor with rotor made of SMC material." Open Physics 15, no. 1 (December 29, 2017): 833–38. http://dx.doi.org/10.1515/phys-2017-0098.

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AbstractDesign and control of electric motors in such a way as to ensure the expected motor dynamics, are the problems studied for many years. Many researchers tried to solve this problem, for example by the design optimization or by the use of special control algorithms in electronic systems. In the case of low-power and fractional power motors, the manufacture cost of the final product is many times less than cost of electronic system powering them. The authors of this paper attempt to improve the dynamic of 120 W line-start synchronous reluctance motor, energized by 50 Hz mains (without any electronic systems). The authors seek a road enabling improvement of dynamics of the analyzed motor, by changing the shape and material of the rotor, in such a way to minimize the modification cost of the tools necessary for the motor production. After the initial selection, the analysis of four rotors having different tooth shapes, was conducted.

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Yao, Yongming, Xupeng Bai, Huiying Liu, Tianyu Li, Jianbo Liu, and Guangli Zhou. "Solid Particle Erosion Area of Rotor Blades: Application on Small-Size Unmanned Helicopters." Symmetry 13, no. 2 (January 22, 2021): 178. http://dx.doi.org/10.3390/sym13020178.

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Rotor blades play an important role in unmanned helicopters, and it is of great significance to study the erosion of rotor blades. In this study, titanium alloy (Ti-4Al-1.5Mn) was used as the helicopter rotor blades’ surface material. The commercial software Ansys-Fluent 18.0 was mainly used to study the erosion of solid particles on the helicopter rotor blades. The moving mesh method and the discrete phase method (DPM) were used to construct an erosion model of the blades at different speeds (500, 1000, or 2000 rpm), and at different particle mass flow rates (0.5, 1, or 1.5 kg/s). The results show that the erosion of helicopter blades is mainly observed at the leading edge and at the tip of the blades. At different particle mass flow rates, greater particle mass flow rates lead to greater DPM erosion rates. As the blade speed increases, the maximum DPM erosion rate decreases, but the severely eroded area increases. Finally, the values of the severely eroded area of the helicopter rotor blades and the ratios of the severely eroded area growth are obtained through the image processing method.

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Shafik, M., B. Nyathi, and S. Fekkai. "Computer Simulation and Modelling of 3D Travelling Wave Ultrasonic Motor Using a Flexural Vibration Ring Transducer." Applied Mechanics and Materials 307 (February 2013): 31–41. http://dx.doi.org/10.4028/www.scientific.net/amm.307.31.

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This paper presents a 3D piezoelectric ultrasonic motor using a single Flexural Vibration Ring Transducer. The motor consists of three main parts, the rotor, the stator and the housing unit. The stator is a piezoelectric transducer ring made from PZT S42 material. Three steel rods and a magnet were designed to support the rotor. The rotor is a sphere of metal that rests on the stator intersecting at the tips of the steel rods and the magnet. The housing unit is made of Perspex, a transparent thermoplastic material. Longitudinal and bending vibration modes, of oscillating structures are superimposed in the motor, generating elliptical micro motions at the driving tips. Pressing the rotor against the stator tips the micro motions are converted into a 3D rotational motion, via the friction between the tips of the three rods and the rotor. The motor structures, working principles, design and finite element analysis are discussed in this paper. A prototype of the motor was fabricated and its characteristics measured. Experimental tests show typical speed of movement equal to 35 revolutions per minute, a resolution of less than 5μm and maximum load of 3.5 Newton.

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Kose, Takahisa, Yasuhiro Uetani, Katsuyuki Nakajima, Kenji Matsuda, and Susumu Ikeno. "Effect of Polygonal Rotor Process on Solidification Structure of Lead-Free Bismuth Bronze." Materials Science Forum 654-656 (June 2010): 1389–92. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1389.

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Semi-solid slurry with fine solid granules for rheocasting was made from lead-free bismuth bronze by passing the low-superheat melt through an opening between a rotating regular octagonal rotor and a circumscribed chill block. We mainly investigated the effect of rotational speed on the structure of a solidified small ingot. The ingot structures changed from the dendrite of rotor-free condition to the rosette at the rotational speed of 50rpm and to the granular with a mean grain size of about 50m at higher than100 rpm. If the slurry made at 100rpm was rheocast to a disk shape by the use of a high pressure casting machine, the disk had almost uniform granular structures from the center to the edge regions.

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Zheng, Gang Feng, Jia Wei Zha, Hai Zeng Liu, and Ling Li. "Research on a Vertical Settlement Type Dehydrator with Spiral Sieves." Advanced Materials Research 562-564 (August 2012): 838–41. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.838.

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This article designed a kind of dehydration device using spiral sieve for solid-liquid separation of coal slime water. The device based on the spiral feeding extrusion, using the materials own gravity to achieve solid-liquid separation, so as to realize the continuous material feeding. Due to the mutual extruding of the material, spiral sieve and spiral rotor, the device has the following advantages: less work cycle, continuous feeding, easy for application and maintenance, reliable work, less repair point and low maintenance costs.

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Lo, Jason. "Designing a Composite Material for Use in Brake Applications." Materials Science Forum 475-479 (January 2005): 1109–12. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1109.

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Traditionally, automotive brake rotors are made with cast iron. Besides having economical advantage, cast iron rotor provides many disadvantages due to its weight, such as reduction in fuel efficiency, increase in green house gas emission, and increase in noise, vibration and hardness. With the development of commercial aluminum composites, composite brake rotors are now manufactured. However, the present commercial composite materials are not specifically made for brake application and there are drawbacks. A major drawback is their poor elevated temperature property. In this paper, the unique properties offered by an aluminum composite for brake application is addressed, and an approach to compensate its properties for brake application is highlighted.

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Mita, Masahiro, Masahiro Masuzawa, Noriyoshi Hirao, and Fumio Kimura. "Study of internal permanent magnet rotor made of 0.6C–13Cr–Fe dual state magnetic material." Journal of Applied Physics 93, no. 10 (May 15, 2003): 8769–71. http://dx.doi.org/10.1063/1.1556983.

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Annenkov, A. N., S. V. Sizikov, and A. I. Shiyanov. "ASYNCHRONOUS MOTOR WITH A HOLLOW PERFORATED ROTOR." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 61, no. 2 (April 5, 2018): 129–40. http://dx.doi.org/10.21122/1029-7448-2018-61-2-129-140.

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The paper presents a brief analysis of the conducted researches of the asynchronous executive motors and the induction motor, as well as the design of the asynchronous executive motor with a hollow perforated rotor. The basic relationships for determining the geometry of the rotor that directly influences the energy performance of the electric machine are also presented. The calculations to determine the geometry of the windows, located within a part of the active length of the stator package in the zone adjacent to the solid frontal area of the surface of the barrel from the side of its end face that is opposite to the bottom of the rotor barrel. In an asynchronous motor with a hollow perforated rotor improvement of energy performance (increase of maximum torque, efficiency and cosj of the engine) is achieved. These advantages are provided by the fact that the windows in the hollow rotor barrel are located within the part of the active length of the stator package in the zone adjacent to the solid frontal section of the rotor barrel surface on its end face that is opposite to the bottom of the barrel. In accordance with the design of the hollow rotor, the bottom of the barrel of one of the ends acts as superconducting short-circulating ring, therefore the ratio of increase in resistance (caused by the transverse edge effect) depends on the distribution of the rotor currents in the area adjacent to the solid frontal portion of the surface of the barrel on end that is opposite to the bottom of the barrel. In the analysis of current density distribution in a hollow rotor with the axial length L', all electric constant and geometric dimensions that are taken into account in the calculation are known values. Arbitrarily set constants are the primary currents and the rotational frequency of the rotor. With the rotation speed increase, due to the presence of the windows on one end face of the rotor and to the impact of the bottom of the barrel on the other one, the elementary currents of the rotor within the active length of the machine boring would be directed mainly in the axial direction, including the cases of comparatively small slippage that corresponds to the small frequency of the alternating magnetization of the rotor material. I. e. a certain part of the active surface of the rotor on the end that is opposite to the bottom of its barrel would not function as the frontal part of the winding while reducing the frequency of currents in the rotor material. This provides an increase in the active component of the rotor current that is proportional to the electromagnetic torque of the motor. Correspondingly, the frontal parts of equivalent winding of the hollow rotor (through which the currents do not generate torque) would not be spread at high rotational speeds to the area of the active length of the machine.

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Aksoy, S., B. Mitlin, and H. Borowy. "Structural Evaluation and Testing of Swept Compressor Rotor." Journal of Engineering for Gas Turbines and Power 116, no. 1 (January 1, 1994): 217–22. http://dx.doi.org/10.1115/1.2906796.

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This paper summarizes specific critical issues encountered in the structural analysis of a swept first-stage compressor blade of a gas turbine engine and the results of the test to evaluate the accuracy of the modeling and surface stress prediction procedure. The surface stresses of a three-dimensional structure were obtained using membrane elements attached to the surface of solid elements. Steady stress measurements were then made during accelerations and decelerations to and from design speed. The test was conducted in an evacuated spin rig. The measurements were used to evaluate the validity of the stress prediction from finite element analysis.

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Utrata, Grzegorz, Jaroslaw Rolek, and Andrzej Kaplon. "The Novel Rotor Flux Estimation Scheme Based on the Induction Motor Mathematical Model Including Rotor Deep-Bar Effect." Energies 12, no. 14 (July 12, 2019): 2676. http://dx.doi.org/10.3390/en12142676.

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During torque transients, rotor electromagnetic parameters of an induction motor (IM) vary due to the rotor deep-bar effect. The accurate representation of rotor electromagnetic parameter variability by an adopted IM mathematical model is crucial for a precise estimation of the rotor flux space vector. An imprecise estimation of the rotor flux phase angle leads to incorrect decoupling of electromagnetic torque control and rotor flux amplitude regulation which in turn, causes deterioration in field-oriented control of IM drives. Variability of rotor electromagnetic parameters resulting from the rotor deep-bar effect can be modeled by the IM mathematical model with rotor multi-loop representation. This paper presents a study leading to define the unique rotor flux space vector on the basis of the IM mathematical model with rotor two-terminal network representation. The novel rotor flux estimation scheme was validated with the laboratory test bench employing the IM of type Sg 132S-4 with two variants of rotor construction: a squirrel-cage rotor and a solid rotor manufactured from magnetic material S235JR. The accuracy verification of the rotor flux estimation was performed in a slip frequency range corresponding to the IM load adjustment range up to 1.30 of the stator rated current. This study proved the correct operation of the developed rotor flux estimation scheme and its robustness against electromagnetic parameter variability resulting from the rotor deep-bar effect in the considered slip frequency range.

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Apostu, Elena Diana, Mihai Alin Pop, and Vlad Monescu. "Influence of Functional and Construction Parameters Over Sieving Process – Rotary Cylindrical Sieve." Advanced Materials Research 1128 (October 2015): 353–63. http://dx.doi.org/10.4028/www.scientific.net/amr.1128.353.

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This paper studied functional parameters: the angle of the shaft section (feed flow rotor) and rotor speed which directly influences the yield of screening with three types of sand (NR1, NC2 and NT3). Experiments was determined following an increase of the values of the shaft angle makes sifting efficiency decrease; the greater the passage section of the material, so the feed rate of the rotor, the efficiency decreases; and a higher rotor speed makes sifting flow to increase with increasing speed. Based on experimental data it was obtained a program that is subject to problem solving regression analysis in which the efficiency is represented as a function of two dependent random variables (speed and angle tilt rotor shaft/rotor speed and power flow rotor/angle tilting spindle and feed rate). The test is a prediction of the values output in certain circumstances depending the two variables. With these predictions decisions can be made for the construction/purchase or for screening.

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He, Xue Tao, Jian Bo Shao, Ying An, Kun Ma, Jian Qiang Wang, and Wei Min Yang. "Research on the Preparation of the Low Density Material with High Volume Filling Rate of Phenolic Hollow Microsphere." Key Engineering Materials 561 (July 2013): 135–40. http://dx.doi.org/10.4028/www.scientific.net/kem.561.135.

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In this paper, an experimental mixing equipment has been developed for producing low density material with a high volume filling rate of phenolic hollow microsphere. The experiments with the equipment aim to explore the feasibility of this equipment for industrial production and to optimize the process. Experiments have been made to evaluate the influence of the filling ratio and the mixing rotor movement on the mixing effect. The results show that when the volume filling ratio of the material to the mixing barrel is about 40% the mixing effect is the best. But with mixing time increasing, the broken ratio of hollow microsphere will increase too. To solve this problem, some changes on the rotor movement have been made. The results show that the broken ratio increasing rate becomes lower and the density becomes more uniform. These indicate that the broken ratio can be well controlled by a suitable production process.

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Zhao, Shanyong, Zhen Liu, Ke Lu, Dacheng Su, and Shangjing Wu. "Investigation on aerodynamic characteristics of bionic membrane nano rotor." International Journal of Micro Air Vehicles 18 (January 2021): 175682932110433. http://dx.doi.org/10.1177/17568293211043304.

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In this paper, the bionic membrane structure is introduced to improve the aerodynamic performance of nano rotor at the low Reynolds number. The aerodynamic characteristics of nano rotor made of hyperelastic material as membrane blades are studied. Firstly, based on the hyperelastic constitutive model, a finite element model of the rotor is established and compared with the results of the modal test to verify the accuracy of the model. Then the computational fluid dynamics model of membrane nano rotor is established which combined with the finite element model. The aerodynamic characteristics of the membrane rotor under hovering conditions are studied using fluid–structure interaction method. It is found that the calculation results matched well with the experiment results. The design of the structural parameters such as the membrane proportion, shape, and position of the membrane rotor is optimized. The influence of each parameter on the aerodynamic performance of the rotor is obtained. Under certain structural conditions, the performance can be effectively improved, which provides a new idea for the design of the nano rotor.

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Uetani, Yasuhiro, Nanako Mori, Masayoshi Dohi, Kenji Matsuda, and Susumu Ikeno. "Manufacturing Slurry and Rheocasting of Hypereutectic Al-Si-Cu-Mg Alloy." Materials Science Forum 706-709 (January 2012): 420–25. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.420.

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Both rapid and stable semi-solid slurry preparation of hypereutectic Al-14.8%Si-4.5%Cu-1.1%Mg alloy (in mass%) with fine solid granules as well as finely dispersed primary silicon particles was tried using a simple method newly developed, where the low-superheat melt passes through a gap between a rotating regular octagonal rotor and a circumscribed chill block. By examining effects of melt temperature running out from tundish, gap distance and rotational speed of rotor on solidification structure of the semi-solid slurry manufactured, the optimum making condition of the targeted semi-solid slurry was found out. Mean sizes of solid granules and primary silicon particles within the slurry, which had been made quickly with the good reproducibility, were 45μm and 20μm, respectively. Subsequently the obtained semi-solid slurries were rheocast into a cylindrical shape cavity by the use of a high pressure casting machine. It has been shown that the rheocast samples have peak hardness value between the gravity casting and the hot-extrusion, but a good age-hardenability somewhat higher than that of gravity casting.

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JIANG, Hongyuan. "Calculation of elastic damping characteristics of rotor support made of metal rubber material under variable loads." Chinese Journal of Mechanical Engineering (English Edition) 20, no. 06 (2007): 33. http://dx.doi.org/10.3901/cjme.2007.06.033.

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Imada, Takumi, Tadashi Makiyama, Heisaburo Nakagawa, Yoshihide Hasegawa, Kenji Tomoda, and Keiji Ogawa. "Study on Grinding of Hypocycloid-Curved Rotor Made of Alumina Ceramics with a Small-Diameter Ball-End Electroplated Diamond Grinding Wheel." International Journal of Automation Technology 15, no. 1 (January 5, 2021): 89–98. http://dx.doi.org/10.20965/ijat.2021.p0089.

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The coating process of high-performance films, such as electrodes for lithium-ion batteries, requires high-precision transfer of settling slurries and high-viscosity liquids. This is because transfer characteristics, such as low pulsation and quantitative transfer, have a significant impact on product performance. A single eccentric screw pump is used in this coating process. One component of this pump is a complex-shaped rotor. This rotor must have high precision and high wear and chemical resistance. To meet these requirements, we applied alumina ceramics, which have excellent material properties, to the constituent materials of the rotor. However, for rotors with hypocycloid-curved surfaces, the development of a highly accurate and highly efficient alumina ceramic grinding technology is required. For this purpose, a free-form grinding technique using small-diameter ball-end electroplated diamond grinding wheels is indispensable. In the present study, we carried out machining experiments on inclined and cylindrical surfaces as a basic study. As a result, by increasing the grinding speed with a high-speed spindle, we achieved the precision, quality, and efficiency required for rotor grinding.

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Lu, Cheng, Yun-Wen Feng, Cheng-Wei Fei, and Xiao-Feng Xue. "Probabilistic analysis method of turbine blisk with multi-failure modes by two-way fluid-thermal-solid coupling." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 16 (July 31, 2017): 2873–86. http://dx.doi.org/10.1177/0954406217723673.

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This study develops multi-extremum response surface method (MERSM) for the probabilistic analysis of aeroengine turbine blisk with the coexistence of many failure modes by considering two-way fluid-thermal-solid coupling under complex working condition. The mathematical model of MERSM was established with respect to the random input variables of inlet temperature, inlet velocity, density of material, and rotor speed, and the output responses of the maximum values of deformation, stress, and strain. The comprehensive probabilistic analysis of turbine blisk was completed based on MERSM. The results demonstrate that the comprehensive reliability degree of turbine blisk is 0.9944 when the allowable deformation, stress, and strain are 2.6 × 10−3 m, 1.26 × 109 Pa, and 6.75 × 10−3 m/m, respectively. The main factors influencing the comprehensive reliability degree of turbine blisk are rotor speed and gas temperature. The secondary factors are inlet velocity and density of material. As revealed from the comparison of methods, MERSM improves the computational speed and efficiency with the guarantee of accuracy. The efforts of this paper provide a promising approach for the nonlinear transient reliability analysis of complex structures with multi-failure modes and two-way fluid-thermal-solid coupling.

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Lv, Shuo, Guihua Zhu, Jinpeng Han, and Ziyue Wang. "Performance of solid particles flow thermal storage material made of desert sand." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 40, no. 15 (June 27, 2018): 1852–76. http://dx.doi.org/10.1080/15567036.2018.1487482.

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Volkova, T. A., R. F. Aletdinov, and E. M. Fedosov. "New Material Creation by Phase Separation in Liquid Mixtures Induced by Non-Uniform Electric Field." Solid State Phenomena 265 (September 2017): 690–95. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.690.

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The fractionation technology of liquid mixtures under the action of an externally applied inhomogeneous electric field and the device – a capacitive electromechanical energy transducer that implements this technology are considered in this article. The operational principle of a capacitive electromechanical energy transducer with liquid rotor is described. The conclusion on the possibility of applying this technology to the fractionation of oil containing emulsions is made.

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Wardach, Marcin, Paweł Prajzendanc, Kamil Cierzniewski, Michał Cichowicz, Szymon Pacholski, Mikołaj Wiszniewski, Krzysztof Baradziej, and Szymon Osipowicz. "SIMULATION AND EXPERIMENTAL RESEARCH OF CLAW POLE MACHINE WITH A HYBRID EXCITATION AND LAMINATED ROTOR CORE." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 11, no. 2 (June 30, 2021): 30–35. http://dx.doi.org/10.35784/iapgos.2656.

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This paper presents the design and research results of a claw pole machine with hybrid excitation. This machine is excited by permanent magnets and an electromagnetic coil. Both excitation sources are located in the rotor of the machine. Additionally, the rotor is made of a laminated core. This approach facilitates the process of its construction and enables the implementation of even very complicated structure of the rotor, which would be difficult in case of making the rotor from a one piece of material. This paper presents the construction as well as the results of simulation and experimental tests of the machine prototype. The tests showed that the proposed machine has the ability to adjust the voltage in a wide range. Such as a feature could be used, for example, to increase the speed of motor operation in case of an electric vehicle application, but also to regulate the voltage in wind turbines which generators operate at varying rotor speeds resulting from changing wind speed.

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Hendra, Anizar Indriani, and Hernadewita. "Applying of Piston Mechanism Design Used in the Wavelength Electrical Generating of Ocean for Fishing Communities." Advanced Materials Research 918 (April 2014): 73–78. http://dx.doi.org/10.4028/www.scientific.net/amr.918.73.

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Pneumatic mechanism widely used in industrial, automotive, aerospace, and etc. The principle of pneumatic like piston is move up and down due to the air pressure inside the piston. Mechanism of piston can be applied to the power plant that utilizes the ocean waves where as use of piston mechanism is very helpful in solving the problem of fossil fuel scarcity as a source of energy in power plants. In this study we will focus on the pneumatic system which utilizing ocean wave that moves longitudinally to encourage buoy that located on the piston shaft to up and down and then the pressing of air out of piston. Output of the piston will be forwarded to the generator (rotor and stator) to produce a voltage. In this paper is focused on the manufacture of pneumatic systems and processes to produce the rotation and voltage. Material of piston tube component made of aluminum and rubber, buoys made of plastic and generator such as of metal and copper coils. Output of the piston will be forwarded to the generator (rotor and stator) to produce a voltage. In this paper is focused on the manufacture of pneumatic systems and processes to obtained the rotation and voltage with aluminum for piston tube material, buoys made of plastic and magnet rotor and copper coils of stator include on the generator and get the results of ocean wave power plant using piston mechanism is 1400 rpm with a voltage of 36 volt.

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35

Whittingham, M. Stanley. "Electrical Energy Storage Using Flywheels." MRS Bulletin 33, no. 4 (April 2008): 419–20. http://dx.doi.org/10.1557/mrs2008.83.

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Flywheel energy storage systems use the kinetic energy stored in a rotor; they are often referred to as mechanical batteries. On charging, the fywheel is accelerated, and on power generation, it is slowed. Because the energy stored is proportional to the square of the speed, very high speeds are used, typically 20,000–100,000 revolutions per minute (rpm). To minimize energy loss due to friction, the rotors are spun in a vacuum and use magnetic bearings. The rotors today are typically made of high-strength carbon composites. One of the main limits to fywheels is the strength of the material used for the rotor: the stronger the rotor, the faster it can be spun, and the more energy it can store.

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Seelam, Anil Babu, Nabil Ahmed Zakir Hussain, and Sachidananda Hassan Krishanmurthy. "Design and analysis of disc brake system in high speed vehicles." International Journal for Simulation and Multidisciplinary Design Optimization 12 (2021): 19. http://dx.doi.org/10.1051/smdo/2021019.

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Brakes are the most important component of any automobile. Brakes provide the ability to reduce or bring automobile to a complete stop. The process of braking is usually achieved by applying pressure to the brake discs. The main objective of this research paper is to propose an appropriate design and to perform analysis of a suitable brake rotor to enhance the performance of the high-speed car. The design of the brake disc is modelled using Solid works and the analysis is carried out using Ansys software. The analysis has been conducted by considering stainless steel and grey cast iron using same brake rotor design so that optimal choice of brake disc can be considered. The analysis considered involves static structural analysis and steady state thermal analysis considering specific parameters on brake rotor to increase the life of brake rotor. From the analysis it is found that the performance and life of disc brake depends upon heat dissipation. From the analysis results it can be concluded that grey cast iron has performed better as compared to stainless steel as this material has anti-fade properties which improves the life of the brake rotor.

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Gmyrek, Zbigniew, Marcin Lefik, Andrea Cavagnino, and Luca Ferraris. "Comparison of the fractional power motor with cores made of various magnetic materials." Open Physics 15, no. 1 (December 29, 2017): 827–32. http://dx.doi.org/10.1515/phys-2017-0097.

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AbstractThe optimization of the motor cores, coupled with new core shapes as well as powering the motor at high frequency are the primary reasons for the use of new materials. The utilization of new materials, like SMC (soft magnetic composite), reduce the core loss and/or provide quasi-isotropic core’s properties in any magnetization direction. Moreover, the use of SMC materials allows for avoiding degradation of the material portions, resulting from punching process, thereby preventing the deterioration of operating parameters of the motor. The authors examine the impact of technological parameters on the properties of a new type of SMC material and analyze the possibility of its use as the core of the fractional power motor. The result of the work is an indication of the shape of the rotor core made of a new SMC material to achieve operational parameters similar to those that have a motor with a core made of laminations.

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38

Lefik, Marcin, Krzysztof Komeza, Ewa Napieralska-Juszczak, Daniel Roger, and Piotr Andrzej Napieralski. "Comparison of the reluctance laminated and solid rotor synchronous machine operating at high temperatures." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 4 (July 1, 2019): 1111–19. http://dx.doi.org/10.1108/compel-10-2018-0405.

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Purpose The purpose of this paper is to present a comparison between reluctance synchronous machine-enabling work at high internal temperature (HT° machine) with laminated and solid rotor. Design/methodology/approach To obtain heat sources for the thermal model, calculations of the electromagnetic field were made using the Opera 3D program including effect of rotation and the resulting eddy current losses. To analyse the thermal phenomenon, the 3D coupled thermal-fluid (CFD) model is used. Findings The presented results show clearly that laminated construction is much better from a point of view of efficiency and temperature. However, solid construction can be interesting for high speed machines due to their mechanical robustness. Research limitations/implications The main problem, despite the use of parallel calculations, is the long calculation time. Practical implications The obtained simulation and experimental results show the possibility of building a machine operating at a much higher ambient temperature than it was previously produced for example in the vicinity of the aircraft turbines. Originality/value The paper presents the application of fully three-dimensional coupled electromagnetic and thermal analysis of new machine constructions designed for elevated temperature.

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39

Coman, George, Sorin Ciuca, Mirela Sohaciu, Ecaterina Matei, Andra Predescu, Andrei Berbecaru, and Cristian Predescu. "Failure Analysis of a Metallic Component Used in Hospital Cooling Equipment." Key Engineering Materials 638 (March 2015): 310–15. http://dx.doi.org/10.4028/www.scientific.net/kem.638.310.

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The paper presents the investigations made on samples taken from the related rotor blade of an hospital cooling equipment.The failure analysis was made in order to find if the failure appear because the metallic material used or was functional problem.The objectives of our analysis and techniques used are described below:determining the chemical composition by optical emission spectrometry;determining the hardness of the material;metallographic analysis by optical microscopy;micro compositional and microstructural analysis by scanning electron microscopy (SEM) and by microanalysis, energy dispersive X-ray (EDAX). Research has highlighted the quality of piece elaboration and casting, which led to a long life of its use.

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40

Du, Xue Ling. "Discuss about Stowing Material for Coal Mine." Advanced Materials Research 962-965 (June 2014): 910–13. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.910.

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Mining with stowing is an environmentally friendly way for coal mine, and stowing material is the key to realize environmental protection and harmonious development. This paper focused on the stowing materials, and evaluation for the stowing material would be made. Stowing materials could be sorted as chemical reaction material, solid refuses from coal mine and natural material for stowing. In the light of the cost and sustainable application of the stowing material, we suggest solid refuses from coal mine are the first choice as stowing materials for now.Urban pollutants could be a good kind of stowing materials, but further study should be made for this material. Also the stowing materials should be as cheap and environmentally friendly as they could.

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41

Fuyama, Nobuyuki, Akira Terayama, Toshio Fujii, Hajime Tani, Shinji Danjo, and Gen Sasaki. "Properties of Small Rotary Engine Housing Fabricated by Aluminum Alloy Matrix Composites." Materials Science Forum 638-642 (January 2010): 933–38. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.933.

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To develop the small engine used for the wireless control helicopter, a very high power density source will be required. The rotary engine (RE) is advantageous in the points such as a volume of the engine, the exhaust gas emissions, and the vibrations. In this research, in order to develop the small RE, the design of the combustion chamber was reviewed. Additionally, the method of the surface treatment of the rotor housing was investigated by the friction wear test to enable the material substitution for aluminum matrix composites. The friction wear tests of composite materials, the Cr and Ni-plated material were conducted. As a result, the sample with the most excellent abrasion resistance was the composite material reinforced with Al2O3 fibers. The wear-loss of this composite material was 1/10 compared with the Ni-plated material. This composite material formed oil pockets between the fiber and the matrix, and a friction coefficient fell below 0.1. Then, the aluminum rotor housing reinforced partially by Al2O3 fiber was fabricated using a low-pressure infiltration method. The maximum power of the small RE (1 rotor, 30 cc) which built in this housing reached about 5 PS in the range from 13,000 to 15,000 rpm. The inside of the housing used composite materials was not damaged even after 30 hours. On the other hand, the flaking off part was observed on the inside part in the case with the housing used the Ni-plated material. Additionally, the output and the torque of the RE made of composite materials were higher than those of the Ni-plated material. This was considered because the friction coefficient of composite materials was lower than that of the Ni-plated material. Finally, the small unmanned helicopter equipped with RE succeeded in a stable flight.

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42

Son, C. Y., H. I. Byun, K. H. Kim, J. K. Choi, and J. Y. Shin. "An Analysis and Experimental Study of the Rotor Blade with Composite Material Fiber Reinforced Plastics." Key Engineering Materials 306-308 (March 2006): 851–56. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.851.

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In these days, large-scale wind turbines are being made of the Glass Fiber Reinforced Plastic (hereinafter F.R.P). Some reinforcement stiffeners such as carbon fiber and polyamide (Kevlar) are not economical for the wind turbine. In addition, the steel or aluminum alloy, featuring heavy weight and metallic fatigue load, is not suitable for global use, except very small-scale wind turbines. In this study, we manufactured a 10kW-grade small Rotor Blade with the F. R. P featuring high stiffness and good dynamic behavior characteristic, and carried out experiments for understanding the bending behavior characteristic of the fatigue load and bending load. And, we examined the experiment results through the Finite Element Method. We compared the experiment results and FEM analysis outputs using the commercial ANSYS FEM program.

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43

Chew, John W., and Nicholas J. Hills. "Computational fluid dynamics for turbomachinery internal air systems." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1859 (May 22, 2007): 2587–611. http://dx.doi.org/10.1098/rsta.2007.2022.

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Considerable progress in development and application of computational fluid dynamics (CFD) for aeroengine internal flow systems has been made in recent years. CFD is regularly used in industry for assessment of air systems, and the performance of CFD for basic axisymmetric rotor/rotor and stator/rotor disc cavities with radial throughflow is largely understood and documented. Incorporation of three-dimensional geometrical features and calculation of unsteady flows are becoming commonplace. Automation of CFD, coupling with thermal models of the solid components, and extension of CFD models to include both air system and main gas path flows are current areas of development. CFD is also being used as a research tool to investigate a number of flow phenomena that are not yet fully understood. These include buoyancy-affected flows in rotating cavities, rim seal flows and mixed air/oil flows. Large eddy simulation has shown considerable promise for the buoyancy-driven flows and its use for air system flows is expected to expand in the future.

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Xu, Hong, Hua Dong Yang, and Guang Ru Hua. "The Effect of Inlet Conditions on Particle Deposition in Axial Flow Compressor." Advanced Materials Research 915-916 (April 2014): 1066–69. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.1066.

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Axial flow compressor is an important component, so the compressor performance is of crucial. Fouling changes blade geometry and blade surface roughness is increased, thus aerodynamic performance is affected. The flow of gas phase and gas-solid coupling phase are implemented to reveal the effect of inlet condition on particle deposition. Based on Euler-Lagrange model, this paper made numerical simulation of gas-solid two phase flow in the axial flow compressor rotor cascade. Simulation result shows that the increase of inlet temperature can result in the reduction of particle volume fraction. And particle mass concentration is affected by particle mass flow rate.

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Xu, Yi She, Xiong Hua Guo, and Hui Mei Kang. "Differential Shear-Compression Theory of Solids Conveying in Vane Extruder." Advanced Materials Research 753-755 (August 2013): 1377–81. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.1377.

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Based on the study of the solids conveying in the vane extruder, a new concept of the differential shear-compression theory is presented. The objective existing of shear and compressive forces is proved by the mathematical method. And the exerted force is proved to be depended on the compression displacement and the differential of compression speed when solid materials are transported in the solids conveying zone of the vane extruder at any moment. Because of the rotor eccentricity to the stator, a conveying mathematical model between the thickness of the material differential laminate and the rotor angle is established. The nonlinear function E(β) andG(β), related to the thickness, density and compactness of materials are obtained through experiment, and the radial force of inner surface of the stator acted on the differential laminate is calculated by the Hooke's law. Based on the torque balance of the material laminate, the force is calculated by integration in the chamber. The finite element analysis of the mathematic model are applied to verify the validity of the differential shear-compression theory, which is also practical to metal material rolling, high pressure double roll crush and other processes with converging geometry.

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Żywica, Grzegorz, Tomasz Z. Kaczmarczyk, and Eugeniusz Ihnatowicz. "The use of modern plastics for the construction of high speed fluid-flow machinery." Mechanik 91, no. 7 (July 9, 2018): 508–10. http://dx.doi.org/10.17814/mechanik.2018.7.67.

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Discussed are issues related to the selection of plastics for manufacturing chosen components of high-speed fluid-flow machinery. In addition to discussing the criteria used for material selection, an exemplary strength analysis of a rotor disk made of plastic was presented. The work carried out was aimed at replacing commonly used metallic alloys with modern plastics, which in turn may shorten production time and reduce costs.

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47

Letopolskii, Anton. "Improving the design of the tunneling shield cutting working body." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 4 (June 25, 2021): 74–82. http://dx.doi.org/10.21440/0536-1028-2021-4-74-82.

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Object of research. The article presents a variant of improving the design of the working body of the tunneling shield, namely, its cutting part. Research aims to confirm the performance of the proposed design using the method of solid 3D modeling in T-Flex CAD. Methodology. The working body of the tunneling shield has been improved by making changes to the design of the working surface of the rotor. Theoretical studies have been carried out to determine the strength characteristics of the proposed rotor design. The proposed rotor model was visualized using the T-Flex CAD software product. The advantages of the solid-state method of 3D modeling are that the mathematical model is endowed with the real physical properties of the object (weight, volume, material, surface area, etc.), and the technology of rapid prototyping allows you to get layouts of photorealistic images in the shortest possible time. Results and discussion. Based on the results of the data obtained in the course of theoretical studies, a comparative analysis of the strength characteristics of the basic and modernized models of the tunneling shield cutting working body was carried out. The studies carried out in T-Flex CAD have confirmed the functionality of the modernized design of the tunneling shield working body. An algorithm for calculating the strength characteristics of the proposed rotor design is presented. The algorithm is universal and can be used to calculate other designs of the tunneling shield working body. Conclusions. As a result of the research carried out, the strength characteristics of the rotor have been determined. Maximum values: displacement modulus – 2.875 · 10–5 m, equivalent stresses – 29.47 MPa, and safety factor for an equivalent stress is 9.446 · 106.

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Librescu, Liviu, and Ohseop Song. "Behavior of Thin-Walled Beams Made of Advanced Composite Materials and Incorporating Non-Classical Effects." Applied Mechanics Reviews 44, no. 11S (November 1, 1991): S174—S180. http://dx.doi.org/10.1115/1.3121352.

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Several results concerning the refined theory of thin-walled beams of arbitrary closed cross-section incorporating non-classical effects are presented. These effects are related both with the exotic properties characterizing the advanced composite material structures and the non-uniform torsional model. A special case of the general equations is used to study several problems of cantilevered thin-walled beams and to assess the influence of the incorporated effects. The results presented in this paper could be useful towards a more rational design of aeronautical or aerospace constructions, as well as of helicopter or tilt rotor blades constructed of advanced composite materials.

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Syarif, M., and M. W. Tjaronge. "A Comparison of Organic Cement Made from Recycled Waste Material and Portland Cement." Engineering, Technology & Applied Science Research 11, no. 4 (August 21, 2021): 7442–45. http://dx.doi.org/10.48084/etasr.4323.

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Organic cement is an environmentally friendly alternative to Portland cement which is acquired by recycled organic waste and Mediterranean soil. Waste management is a global problem. The physical characteristic test results of the organic cement show that the weight test of fresh organic concrete is 2081kg/m³ and the dry weight of concrete is 2032kg/m³ which are smaller than Portland cement concrete's which are 2525kg/m³ and 2405 kg/m³ respectively. The fineness of alternative cement grains that passed the 200 mesh sieve is 56%, which is more than Portland cement's which is 52%. The solid weight of alternative cement is 1200kg/m3 whereas the solid weight of Portland cement is 1250kg/m3.

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Xu, Zhi Qiang. "Research on the Optimization Design of Gas-Solid Coupling of Wind Turbine Blades." Advanced Materials Research 1022 (August 2014): 143–46. http://dx.doi.org/10.4028/www.scientific.net/amr.1022.143.

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The effects of high-altitude wind shear of wind speed should be considered, the appropriate number of distribution group should be determined and the distribution of wind speed hybrid model parameters and solving should be loaded onto the blades. When the stress of rotor blade is analyzed, the elastic deformation of the blades and the effects of the vibration of oscillating flow field on reaction of the blades must be considered during the operation. Thus the laws of blade load distribution and the corresponding deformation can be accurately calculated to analyze the interplay between deformation vibration airflow and paddle, to determine the law of deformation of rotor blades, the surface pressure distribution, stress distribution and blade design safety factors. When wind load changes with the wind speed, the adaptive blades are powered by aeroelastic, the law of wielding and flapping of the blade will be studied. The torsion coupling effects of adaptive blade, blade bending ,the law of torsional deformation variation of the angle of attack and the impact on aeroelastic blades structural strength will be explored. The results of this study design will be optimized as the power factor, improving the stability of the design of wind turbine power output, reducing material consumption blades absorb vibration and reducing wind load maneuvering to avoid blade stall achieve pitch control. Thus it provides a theoretical basis for optimal design of strength and stiffness of the elongated paddles.

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Journal articles on the topic 'Rotor made of solid material'

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