Journal articles: 'Drums design'

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Yu, Kai An, Kun Ding, and Ying Hua Chen. "Design and Research of Double-Drum Winch for Lowering Mooring Anchor Chains." Advanced Materials Research 490-495 (March 2012): 2178–82. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.2178.

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The designed double-drum winch is applied to the development of Liwan 3-1 gas field of the South China Sea for lowering mooring anchor chains, which is composed of motor, brake, reducer, front and rear drums, two-stage gear transmission devices, rack and base. There is an intermediate axle between two drums of the winch. On the intermediate axle there are two gears, a large one and a small one. The large gear installed on the intermediate axle goes into mesh with the pinion gear installed on the output shaft of reducer, and the small gear installed on intermediate axle meshes with the large gears installed on the front and rear drums separately. The speed of rotate from the motor is sent to the two-stage gear transmission devices by the reducer, to realize two drums rotate simultaneously in the same direction. Compared to the double-drum winch of multi-motor synchronous drive, the designed double-drum winch can be more reliable and avoid the difficult technical problems of multi-motor synchronous drive and control in a large extent.

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Ma, Xiao Hong, and Xin Wei Yu. "The Expert System Design of Shearer Spiral Drums." Applied Mechanics and Materials 33 (October 2010): 433–36. http://dx.doi.org/10.4028/www.scientific.net/amm.33.433.

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A spiral drum is a important cutting mechanism, and its design quality has important effect on the machine service life, volume of the coal block and breast conditions. By analysis and study of the key technology on the expert system and reference to expert experience and design examples, the expert system of shearer drums is found bottom-up upper based on VB6.0 programming platform and adopted modular design method. It is quickly designed and simulated for the spiral drum structure by using the expert system, which improves design qualities and efficiencies on shearer drum and lays a foundation for the designing high quality shearer.

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Fidrovska, N., K. Liesovytskyi, and A. Chernyshenko. "New approach for design of mine drums." Engineering 17 (2016): 59–61. http://dx.doi.org/10.32820/2079-1747-2016-17-59-61.

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Meunier, Sarah M., Joanne Gamage, Zdravko Duvnjak, and Zisheng Zhang. "Design and Characterization of a Novel Rotating Corrugated Drum Reactor for Wastewater Treatment." International Journal of Photoenergy 2010 (2010): 1–10. http://dx.doi.org/10.1155/2010/146743.

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A novel photoreactor system consisting of a TiO2-coated corrugated drum and a UV light source is experimentally characterized for the treatment of phenol-polluted wastewaters. The design incorporates periodic illumination and increased agitation through the introduction of rotation. The effects ofrent degrees and flat fins to increase surface area, varying rotational speed, initial pollutant concentration, and illumination intensities were studied. The corrugated and finned drums did not exhibit a critical rotational speed, indicating that there is excellent mass transfer in the system. A Langmuir-Hinshelwood kinetic analysis was applied to the degradation, and an average adsorption coefficient ofK=0.120 L/mg was observed. The overall reaction rate increased with increasing surface area from 0.046 mg/L/min for the annular drum to 0.16 mg/L/min for the 40-fin drum. The apparent photonic efficiency was found to increase with increasing surface area at a faster rate for the corrugations than for the fin additions. The energy efficiency (EE/O) found for the drums varied from 380–550 kWh/m3, which is up to 490% more energy-efficient than the annular drum.

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Qin, Huanhuan, Aiguo Song, and Yiting Mo. "Evaluation of a multi-drum magnetorheological brake via finite element analysis considering number of drums and fluid gap selection in optimization." Journal of Intelligent Material Systems and Structures 30, no. 5 (February 13, 2019): 778–87. http://dx.doi.org/10.1177/1045389x19828517.

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Under the same excitation, the multi-drum magnetorheological brake has a nonuniform distribution of flux density over fluid gaps. Each fluid gap has its own flux density and shear area. Therefore, the number of drums and the fluid gap selection in optimization are two important parameters to be considered in a multi-drum brake design. When a fluid gap is selected in optimization, the brake is optimized to reach the maximum required flux density over this gap. This article focuses on evaluating the influence of these two parameters on the performance of the multi-drum brake. According to the number of drums and the fluid gap selection in optimization, the brakes were marked and optimized via finite element analysis. After all optimal designs were obtained, the performance in terms of torque, volume, mass, and power consumption as well as the torque–volume, torque–mass, and torque–power ratios were calculated and compared. Based on the evaluation results, suggestions on the number of drums and the fluid gap selection in optimization are given.

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Alexis, Clifford, Al O'Connor, and Thomas D. Rossing. "Tonal design and tuning of Caribbean steel drums." Journal of the Acoustical Society of America 80, S1 (December 1986): S102. http://dx.doi.org/10.1121/1.2023509.

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Kudryavtsev, L. A., and V. N. Roshchin. "Reducing dynamic loads in design of assembling drums." Chemical and Petroleum Engineering 21, no. 7 (July 1985): 317–19. http://dx.doi.org/10.1007/bf01149656.

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Hofmann, Raimond, Christopher Matthes, and Thorsten Schmidt. "Capabilities of Additively Manufactured Rope Drums." innoTRAC Journal 1 (December 3, 2020): 26–36. http://dx.doi.org/10.14464/innotrac.v1i0.461.

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Many industry sectors benefit from the new opportunities additive manufacturing provides. Lightweight designs and integration of function are only two aspects. As there are no approaches present to insert additive manufacturing into the design of hoisting appliances though, we try to evaluate the room for improvement through experimental analysis. Additively manufactured synthetic drum-bodies fit for 8 mm wire ropes and containing different infill structures were tested for tensile strength. The cylindrical gyroid TPMS and straight spokes structures performed best with standardised tensile strengths of 17.53 and 16.40 kN/kg. Our findings indicate that additively manufactured rope drums can be a viable option for future hoisting appliances.

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Leng, Yue Feng, Jia Liu, and Feng Zu. "Parametric Design on Belt Conveyor Drums Based on VBA." Advanced Materials Research 156-157 (October 2010): 1243–46. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.1243.

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As an example to belt conveyor drums, this article introduces a parametric drawing method. The method uses inlays language VBA to secondary develop AutoCAD and achieves the design process of components through the procedure. The parametric design method reduces the designer’s duplicated drawing works which carried on to some kinds of components, and enhances the drawing quality and efficiency.

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Hernández-Suárez, Rogelio, Héctor Puebla, and Ricardo Aguilar-López. "Parametric Approach for the Optimal Design of Knockout Drums." Industrial & Engineering Chemistry Research 46, no. 21 (October 2007): 7008–17. http://dx.doi.org/10.1021/ie0701930.

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11

Kowalski, J. "Minimum Mass Design of Boiler Drums by Nonlinear Programming." Journal of Pressure Vessel Technology 107, no. 1 (February 1, 1985): 83–87. http://dx.doi.org/10.1115/1.3264411.

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Based on the systems approach to mathematical modeling, the paper shows the method for selecting the optimum design features of boiler drums with a given structure for minimum mass. The optimization problem is reduced to finding the minimum of the objective function in a 10-dimensional space bounded by 11 constraints. The numerical example has been presented.

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Yu, Xiao Guang, Chuan Tan, and Gui Bing Liao. "The Analysis of the Automatic Steel Drum Tilter." Applied Mechanics and Materials 345 (August 2013): 534–38. http://dx.doi.org/10.4028/www.scientific.net/amm.345.534.

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In order to meet the requirements of a steel drum manufacturing plant on steel drums flip using traditional design methods design the steel drums flipping machine. The finite element analysis method to flip the frame and the strength of the drive shaft. Flip frame analysis results obtained displacement, the stress distribution diagram, the maximum stress of 41.361MPa, and the stress concentration point to flip the frame and at the connection of the link plate. Analysis the shaft torsional displacement, stress and its former fifth-order natural frequencies and mode shapes, after optimization analysis of the shaft, the quality of the drive shaft is reduced by about 13.49%, and to identify the best hollow radius R1 = 15.035mm.

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13

Yu, Kai An, Tao Yang, and Chang Zhi Gong. "Design and Research of Double-Drum Winch with Anti-Pressure Wheel." Advanced Materials Research 479-481 (February 2012): 1709–13. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1709.

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In view of the problems of large stress and severe bearing heating in double-drum winch at present, this paper adopted a new method to enhance bearing capacity for double-drum winch by adding anti-pressure wheels between two drums. Finite element methods were used to analyze the strength of 4000kN-traction double-drum winches with anti-pressure wheels and without anti-pressure wheels respectively. The results of the analysis revealed that the stress of the cylinder bearing decreased from 264MPa to 167MPa. The new method by adding anti-pressure wheels had remarkably improved the endurance of the bearing. Therefore, the design method can be widely used in large-traction double-drum winch.

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14

Li, Wenqian, Xuegang Liu, Sheng Fang, Xueliang Fu, and Kaiqiang Guo. "Monte Carlo Simulation and Experimental Validation for Radiation Protection with Multiple Complex Source Terms and Deep Penetration for a Radioactive Liquid Waste Cementation Facility." Science and Technology of Nuclear Installations 2020 (October 8, 2020): 1–13. http://dx.doi.org/10.1155/2020/8819794.

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A new radioactive liquid waste cementation facility was under commissioning recently in the Institute of Nuclear and New Energy Technology of Tsinghua University, which is designed to simultaneously process multiple intermediate-level radioactive waste drums. Therefore, the multiple volume sources and the scattering effect becomes a key issue in its radiation protection. For this purpose, the Monte Carlo program FLUKA code and experimental measurement were both adopted. In the FLUKA simulation, five different scenarios were considered, i.e., one drum, two drums, four drums, six drums, and eight drums. For the multiple volume sources, the source subroutine code of FLUKA was rewritten to realize the sampling. The complex shielding also leads to a deep penetration problem; hence, the optimization algorithm and variance reduction techniques were adopted. During the measurement, two scenarios, outdoor and indoor, were carried out separately representing the dose field when only one drum is considered and when the scattering effect is considered. A comparison between the experiments and calculations shows very good agreement. From both of the Monte Carlo simulation and the experimental measurement, it can be drawn that, in the horizontal direction, with the increase of the drum number, the dose rate increases very little, while in the vertical direction, the increase of the dose rate is very obvious with the increase of the drum number. The complicated source term sampling methods, the optimization algorithm and variance reduction techniques, and the experimental verification can provide valuable references for the similar scattering problem in radiation protection and shielding design.

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15

Wydro, Tomasz. "Impact of the Winding Angle of the Auger Blade on the Loading Process With Milling Auger Drums." New Trends in Production Engineering 3, no. 1 (August 1, 2020): 241–50. http://dx.doi.org/10.2478/ntpe-2020-0020.

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AbstractThis publication addresses the impact of selected design parameters of milling auger cutting drums on the loading process, and above all the winding angle of the auger blade. The loading process is often referred to as an auxiliary process because the milling process is considered to be the dominant throughout the work of the cutting drum. The correct determination of the relationship between the mining process and the loading process allows to understand how the individual design and kinematic parameters of the mining drums and the mining machine on which they are installed affect each other. The publication discusses the problem of loading with milling cutting drums and ways to increase its efficiency. The research results of the loading process have been presented, affecting the efficiency of this process in the aspect of various angles of inclination of the auger blades. Based on the tests, conclusions have been formulated that allow for the possible selection of an appropriate winding angle for the auger blade, depending on the granulation of spoil.

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Li, Jia, Lei Wang, and Xin Wang. "Fatigue Life Reliability Analysis of Belt Conveyor Driving Drums Based on FEM." Advanced Materials Research 118-120 (June 2010): 492–96. http://dx.doi.org/10.4028/www.scientific.net/amr.118-120.492.

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Conveyer system security and reliability are related to belt conveyor drum design level .This paper proposes a method of analyzing the belt conveyer drum fatigue life reliability based on FEM, and establishes a real-time dynamic loading model, which can reflect accurately the condition of drum actual work load. This method realize drums fatigue life reliability analysis by applying rain-flow count method for processing stress spectrum that are obtained from FEM, it combines material P-S-N curves and other performance parameters and adopts Miner ruler. By applying the method on a practical project, the results indicate that the method is correct and practical. It poses the ability of avoiding the blindness in the drum structure size design, and it has the vital significance of raising drum design level.

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Sun, Hui, Lin Jing Xiao, and Chun Jian Su. "Design and Analysis on the Increasing Friction Mechanism of the Convex-Hull-Typed Bionic Driving Drum." Advanced Materials Research 472-475 (February 2012): 2562–67. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2562.

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The micro textures in the foot surface of the animals such as locust and tree frog have been analyzed with the bionic tribology and several kinds of the convex-hull-typed bionic driving drums are designed. According to the friction mechanism of the rubber material and the simulation results by the software ANSYS, the increasing friction mechanism of the convex-hull-typed bionic driving drum is analyzed. When the convex-hull-typed bionic driving drum contacts with the rubber belt, besides the sliding friction force, the friction force between them also includes the additional resistance resulted from the inlaying ‘meshing effect’ between the convex hulls and the rubber belt. The convex hulls on the surface diminish the contact area, so does the sliding friction force. Therefore, only if the additional resistance greater than the decrease of the sliding friction force, the convex-hull-typed bionic surface can increase the friction force. The dynamic tension measuring system of the belt conveyor is designed and manufactured to measure the friction coefficient between the belt and the driving drum. The experiment results prove that the convex-hull-typed bionic driving drums that meet the certain conditions have the increasing friction effect. The research achievement can be used in many situations which need increase the friction force.

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18

Somanchi, Sriradha, Vladislav Kecojevic, and Tadeusz Kozminski. "Advance design of lacing and breakout patterns for shearer drums." Mining Technology 114, no. 2 (June 2005): 118–24. http://dx.doi.org/10.1179/037178405x44548.

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19

Sinotin, A. P., and V. A. Kim. "The design of drums for the assembly of small tires." Chemical and Petroleum Engineering 23, no. 2 (February 1987): 47–50. http://dx.doi.org/10.1007/bf01149471.

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20

Ali, Yazen Munaf, Dr Saad Nahi Saleh, Wameed Abdulhassan Ayash, Saramd Zaki Ghani, and Sudad Adil Salih. "Design and CFD Simulation of Knockout Drum." Journal of Petroleum Research and Studies 10, no. 4 (December 21, 2020): 181–98. http://dx.doi.org/10.52716/jprs.v10i4.377.

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Recently, the emission of black smoke over local area of Basra Oil Company from flare system represents a big problem facing the company and causing huge pollution in the surrounding environment. The main reason of emission black smoke is carryover of droplets of the rest hydrocarbons such as condensate and droplets of crude oil by gases which are came from degassing stations facility in the north Rumelia field, southern Iraq. In this study, a design methodology was developed for designing the knockout drum, and different design criteria were used in sizing and selecting the drum based on the specification of the inlet fluid mixture. Three designs of knockout drums with respect to the gas conditions were performed. The horizontal knockout drum with a diameter of 2.5 m and length of 5.5 m was simulated using a Computational Fluid Dynamics (CFD) model (ANSYS FLUENT 15.0). The CFD model predicted very well the two-phase flow behavior and proved the need for a vortex breaker at the liquid outlet. The CFD simulation revealed quantitatively that the design configuration of the knockout drum performed the separation of condensate droplets from natural gas with excellent efficiency.

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21

Mihailidis, Athanassios, George Savaidis, Emmanouil Bouras, Emmanouil Athanasopoulos, Nikolaos Ganavaras, Ioannis Topalidis, Dimitrios Karageorgos, and Ilias Rampidis. "Finite element analysis and improved design of large-scale belt-conveyor drums." International Journal of Structural Integrity 7, no. 6 (December 5, 2016): 724–38. http://dx.doi.org/10.1108/ijsi-10-2015-0048.

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Purpose Large-scale belt-conveyor systems are extensively used in open mines to continuously transport bulk material. Conveyor pulleys are critical components and failures have significant financial consequences due to extended downtime. Aiming at increasing their durability, two critical spots are identified: the drum and the welds between end-plates and drum. Alternative designs have been evaluated. The paper aims to discuss these issues. Design/methodology/approach Loads on the driving drum are determined from measurements of the bearing force and the motor power. The friction interaction between belt and drum is described by the creep model and its impact is evaluated by comparing the results obtained for low and typical values of friction coefficient. Alternative designs are analysed using finite element method with optimised variable density mesh. The stress field and the deformations are calculated and evaluated. Findings Friction affects the torque transmission capacity and force distribution, but it is shown that in this case it has almost no impact on the maximum von Mises stress which occurs on the inside surface of the drum; therefore fatigue cracks initiated there, cannot be visually detected. A reinforcing diaphragm is added at the mid-plane to reduce the stress. A new, improved design is proposed to eliminate welds between the end-plates and the drum. Research limitations/implications The new proposed design has to be tested in the field to ultimately validate its higher durability. Originality/value The impact of the friction of the belt on the drum is demonstrated. The reinforcement resulting from a mid-plane diaphragm is quantitatively evaluated and assessed. A new improved pulley design is proposed aiming at significantly increased operational life compared to the one of the current design.

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Серга, Георгий, Georgiy Serga, Дмитрий Серый, Dmitriy Seryy, Алексей Марченко, and Aleksey Marchenko. "INVESTIGATION OF PHYSICAL PHENOMENA OCCURRED IN CONTACT AREA OF BULK PARTICLES AT THEIR MOTION IN SCREW DRUMS BY METHODS OF SIMILARITY THEORY, ENGINEERING AND COMPUTER GRAPHICS." Bulletin of Bryansk state technical university 2019, no. 6 (June 27, 2019): 20–28. http://dx.doi.org/10.30987/article_5d10851f18f085.56011612.

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In Trubilin State Agricultural University of Kuban there are created machinery working devices as screw drums allowing the assurance of motion of bulk particles at their horizontal location and also promoting the intensity of particles interaction between each other and with the walls of screw drums which widens technological potentialities and decreases dimensions of equipment and its weight. In the paper there are shown various sorts of screw drums and analytical methods of the study of physical phenomena taking place in the contact area of bulk particles. The search of a screw drum design was carried out by the methods of descriptive geometry and engineering graphics with the aid of the “Compass-3D” program complex. The apparatus of dimensionless kinematic functions (similarity invariant) and the analysis of dimensionalities allowing the investigation not one such a case but their infinite number united by the community of properties was used.

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Gao, Kuidong, Xiaodi Zhang, Liqing Sun, Qingliang Zeng, and Zhihai Liu. "Loading Performance of a Novel Shearer Drum Applied to Thin Coal Seams." Energies 14, no. 2 (January 11, 2021): 358. http://dx.doi.org/10.3390/en14020358.

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The poor loading performance of shearer drums restricts the development and production efficiency of coal in thin coal seams. Changing operation and structural parameters can improve the drum’s loading performance to some extent, but the effect is not obvious. A two-segment differential rotational speed drum (TDRSD) was proposed after analyzing the drum’s influence mechanism on coal particles. To further reveal the drum’s coal loading principle, the velocity, particles distribution, and loading rate were analyzed. The effect of the matching relationship of the rotational speed and helix angle between the front and rear drum are also discussed. The results show that a lower front drum rotational speed had a positive impact on improving the loading performance, and the loading rate first increases and then decreases with the increase in rear drum rotational speed. The optimal loading performance was obtained in the range 60–67.5 rpm. The front drum’s helix angle had no evident effect on loading performance, and the loading rate increase with the increase in the rear drum’s helix angle. The results provide a reference and guidance for operation parameters selection, structure design, and drum optimization.

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Gao, Kuidong, Xiaodi Zhang, Liqing Sun, Qingliang Zeng, and Zhihai Liu. "Loading Performance of a Novel Shearer Drum Applied to Thin Coal Seams." Energies 14, no. 2 (January 11, 2021): 358. http://dx.doi.org/10.3390/en14020358.

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The poor loading performance of shearer drums restricts the development and production efficiency of coal in thin coal seams. Changing operation and structural parameters can improve the drum’s loading performance to some extent, but the effect is not obvious. A two-segment differential rotational speed drum (TDRSD) was proposed after analyzing the drum’s influence mechanism on coal particles. To further reveal the drum’s coal loading principle, the velocity, particles distribution, and loading rate were analyzed. The effect of the matching relationship of the rotational speed and helix angle between the front and rear drum are also discussed. The results show that a lower front drum rotational speed had a positive impact on improving the loading performance, and the loading rate first increases and then decreases with the increase in rear drum rotational speed. The optimal loading performance was obtained in the range 60–67.5 rpm. The front drum’s helix angle had no evident effect on loading performance, and the loading rate increase with the increase in the rear drum’s helix angle. The results provide a reference and guidance for operation parameters selection, structure design, and drum optimization.

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Li, Wenqian, Xuegang Liu, Ming Li, Yilin Huang, and Sheng Fang. "Multilayer Shielding Design for Intermediate Radioactive Waste Storage Drums: A Comparative Study between FLUKA and QAD-CGA." Science and Technology of Nuclear Installations 2019 (April 4, 2019): 1–11. http://dx.doi.org/10.1155/2019/8186798.

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To ensure that the outside dose rate of waste package is below the limitation of national laws and regulations, based on the standard 200L drum, a new drum with inner shielding was proposed for intermediate-level radioactive waste (ILW) storage. For comparison, FLUKA and QAD-CGA were used to verify the shielding design of the ILW storage drums produced in INET with multiple inner shielding layers. The flux and dose were calculated and analyzed for four different cases. In QAD-CGA calculation, it was found that different buildup factors can lead to the considerably different results. A weighted algorithm was proposed to correct QAD-CGA for multilayer shielding cases. In FLUKA calculation, parameter optimization and tailored variance reduction technique (VRT) were used. Quantitative efficiency evaluation of different FLUKA settings using the FOM factor was carried out. The differences in the calculated dose rates results between the FLUKA and QAD-CGA programs are within one order of magnitude. The results of QAD-CGA are generally higher than those of FLUKA. The analysis shows that appropriate corrections in QAD-CGA can make the trend of the calculation results more consistent with the theory. In FLUKA calculation, with optimized setting and VRT adopted, the calculation efficiency can be improved more than 20 times. The results of this study provide not only suggestions for the design of the ILW storage drums but also useful references for other similar work.

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Lee, Kwangjin, and Frank W. Brooks,. "Hot Spotting and Judder Phenomena in Aluminum Drum Brakes." Journal of Tribology 125, no. 1 (December 31, 2002): 44–51. http://dx.doi.org/10.1115/1.1506315.

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Hot spotting and judder phenomena were observed in automotive aluminum drum brakes. A vehicle judder test schedule was developed to determine the critical speed for thermoelastic instability (TEI). The brake material properties relevant to the TEI analysis were measured as a function of temperature. The critical speeds for the brake systems with different drum materials were determined by the judder schedule and they are compared with the analytical predictions of Lee (2000). The brake drums and linings were then modified and tested in order to investigate its effects on the hot spotting and judder propensity. The design modifications include brake linings with a different compound, stress-relieved drums, linings with a convex or concave surface finish, three-segmented linings, and linings with a circumferential groove. The linings with a circumferencial groove effectively reduce the size of hot spots and the best judder rating was achieved.

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Sobota, Piotr. "Comparison of Conventional Sprocket Drum and Sprocket Drum with Modified Design." Archives of Mining Sciences 61, no. 3 (September 1, 2016): 509–22. http://dx.doi.org/10.1515/amsc-2016-0037.

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Abstract Seats in conventional sprocket drums are symmetrical. Due to the set general direction of sprocket drum revolutions resulting from the direction of rock transport, the wear of the seat bottoms and teeth flanks may be reduced by introducing the asymmetry of the profile of the sprocket drum seats. The proposed modification of sprocket drum seats’ profile consists of inclining the seat bottom towards the expected direction of the basic drum revolutions. The work compares the loads on the seats and teeth of a conventional drum with its profile conforming to the standard to a modified drum with an asymmetric profile of seats. For the general direction of sprocket drum revolutions, the maximum values of all forces are higher for a standard drum than for a modified drum. The profile asymmetry substantially shortens the friction path of the horizontal link front torus on the seat bottom and relative total friction work on the seat bottom and lessens the occurrence probability of the slide of the horizontal link rear torus on the tooth flank. The modification of the profile causes also the asymmetric wear of link joints. The total relative friction work is considerably reduced in the front joint as compared to a conventional drum, and the total relative friction work in the rear joint is increasing at the same time.

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Gadala, M. S., S. Fok, and M. Tayler. "Analysis and Design of Pressure Washer Drums for Pulp and Paper Industry." Key Engineering Materials 145-149 (October 1997): 1065–70. http://dx.doi.org/10.4028/www.scientific.net/kem.145-149.1065.

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Peterson, S. A. "Design of optimum structures of drums for assembling heavy-freight multicord tires." Chemical and Petroleum Engineering 26, no. 2 (February 1990): 64–68. http://dx.doi.org/10.1007/bf01155917.

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Bołoz, Łukasz, and Leonel F. Castañeda. "Computer-Aided Support for the Rapid Creation of Parametric Models of Milling Units for Longwall Shearers." Management Systems in Production Engineering 26, no. 4 (December 1, 2018): 193–99. http://dx.doi.org/10.1515/mspe-2018-0031.

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Abstract The cutting drums are the basic working components of many mining machines. The article focuses on differences in the design of cutting drums depending on the expected working conditions. Then, the unique calculation procedure is presented which allows to determine the load on the unit by reducing the forces acting on a single pick, taking into account the picks bent on the cut-off disc. Until now, this has been omitted in the literature. The results of the calculations for the selected cutting drum performed in MATLAB are also presented. The further section proposes to use Autodesk Inventor Professional's iLogic Tool for quick modelling of cutting drums. The principles of creating parameterized models and compositions using programming elements in the form of iLogic scripts are presented. The articles presented a ready-made units generator, taking into account the possibility to determine values of selected numerical parameters of the unit: diameter, web, number of patches and cutting pitch. The generator also allows you to select the type of pick holders, conical pick types, as well as the choice of pick system for repositioning or matching picks.

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Prushak, V. Ya, and A. P. Dvornik. "Method for calculating a two-drum mine winder." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 1 (April 6, 2020): 62–71. http://dx.doi.org/10.29235/1561-8358-2020-65-1-62-71.

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In the Republic of Belarus, on the base of JSC “Soligorsk Institute for Resources Saving Problems with Pilot Production”, the development and launch of import-substituting mass production of large-capacity double-drum mine winders with an increased diameter of winding drums up to 7 meters were fulfilled. Earlier, in the post-Soviet space, machines with similar technical characteristics were not produced. Accordingly, for the implementation of the project, a comprehensive study of all the scientific and technical aspects of the creation of this equipment was required, taking into account the material and technical capabilities of the enterprises of domestic mining engineering. One of the important results of this study was the development of an improved methodology for calculating the basic elements of a winder. The technique allows calculating the strength parameters of the winding drums, shaft, disengagement mechanism, drive elements (mating clutch), bearings together with their anchor fasteners, reduced to normal operating conditions and to conditions of emergency wire breakage. The methodology includes the calculation of the stress-strain state of the elements of the winding drums using the finite element method and allows using the obtained numerical data to simulate the stress-strain state of the main components of the hoisting machine to calculate its safety factors in normal operation and in emergency conditions. The developed methodology was successfully tested in the design and technological center of JSC “Soligorsk Institute for Resources Saving Problems with Pilot Production” during the development of double-drum mine winders with large diameter winding drums for skip hoisting units of the Petrikov mining and processing complex, as well as during the modernization of existing hoisting units at working mines of JSC “Belaruskali”.

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Zastempowski, Marcin, and Andrzej Bochat. "Research Issues in the Process of Cutting Straw into Pieces." Sustainability 12, no. 15 (July 31, 2020): 6167. http://dx.doi.org/10.3390/su12156167.

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Comparative studies of the classical and new design of a chaff cutter’s cutting drum have been conducted within the frames of the study in order to determine their functional characteristics at the time of cutting rye straw into pieces of specific length (into chaff). A classical design of a cutting drum is of the shape of a roller and is suitable for material layer cross-cutting. However, the new drum design has the shape of a double truncated cone and, with the use of it, diagonal cuts in two directions can be realized. The studies were conducted for four designs of cutting drums with cutting angles α = 0° (classical design) and α = 15°, α = 30°, and α = 45° (new design). Three indicators were applied for the assessment: capacity, unit energy consumption, and the unit cutting resistance. The obtained results show that the use of a new drum design makes it possible, depending on the assumed parameters of the cutting process and the material’s compaction degree, to increase the process’s efficiency by up to 25%, lower the unit energy consumption up to 34%, and lower the unit cutting resistance by up to 8%. The conducted experimental studies have unequivocally shown that the use of a new cutting drum design, as compared to the classical one, results in a considerable increase in the cutting process’s performance. Studies on the new design of a chaff cutter’s cutting drum, of the shape of a double truncated cone, belong to original ones that so far have not been described in the available literature.

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Betts, Richard J. "Structural Innovation and Structural Design in Renaissance Architecture." Journal of the Society of Architectural Historians 52, no. 1 (March 1, 1993): 5–25. http://dx.doi.org/10.2307/990755.

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The characteristic structural forms of large Renaissance churches-domes, drums, pendentives, and barrel vaults-were the products of innovation in theory and practice during the later fifteenth century in Italy that culminated in Bramante's projects for the new Saint Peter's. Significant ideas were contributed by Leon Battista Alberti, Francesco di Giorgio, and Leonardo da Vinci. Francesco di Giorgio's geometrical methods of design for churches as described in his second treatise incorporate a procedure for calculating the thickness of walls bearing vaults. Francesco di Giorgio tested the procedure in his own churches, and it was later used by Bramante.

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Rambabu, D., R. Gopinath, U. Senthil rajan, and G. B. Bhaskar. "Weight reduction of a standard brake drum: A design approach." International Journal of Engineering & Technology 3, no. 2 (April 25, 2014): 201. http://dx.doi.org/10.14419/ijet.v3i2.1822.

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A Brake drum is specialized brake that uses the concept of friction to decelerate the vehicle speed. The deceleration is achieved by the assistance of the friction generated by a set of brake shoes or pad, when operator presses against a rotating brake drum. The material generally preferred for making the brake drum is grey cast iron or vermicular cast iron. The drum brake is highly efficient for hand brake and service brake applications. During the operation of drum brake excessive heating of brake drum may occur. This excessive heating occurs due to repeated or frequent contact of the brake shoes against the drum. This causes the drum to crack, oversize, extreme wear, out of round drums and also leads to vibration which while braking will leads to reduced brake drum life and braking efficiency. The Un-laden weight of the vehicle will result in increased fuel consumption, reduced payload and ride handling characteristics. The objective of the paper is to improve the thermal characteristics by incorporating fins in the brake drum and to reduce the un-laden weight of the vehicle by changing the rib thickness, wall thickness and base flange thickness. The design is done by using 3D CAD Modelling software and Hexahedral finite element model prepared by using CAE pre-processing software and Stiffness analysis. Design iterations are carried out by using Linear/Non-linear Finite Element Solvers, Stress Displacement and Temperature is post-processed for design validation. Optimized design solution obtained based on the comparison study between the iteration with rib thickness 75 mm, star shaped removal and wall thickness 17 mm has been chosen. 1.8Kg of weight is being reduced from the brake drum including fins. Keywords: Drum Brake, 3D CAD Modelling, Para Metric Matrix, Structural Analysis, Fins.

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Grossel, Stanley S. "Design and sizing of knock-out drums/catchtanks for reactor emergency relief systems." Plant/Operations Progress 5, no. 3 (July 1986): 129–35. http://dx.doi.org/10.1002/prsb.720050304.

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Cheban, A. Yu. "Improving design and application method of screening bucket excavators." Earth sciences and subsoil use 44, no. 1 (April 5, 2021): 56–62. http://dx.doi.org/10.21285/2686-9993-2021-44-1-56-62.

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The purpose of the study is to increase the productivity and economic efficiency of mining operations using screening bucket excavators on the basis of the introduction of a new technical and technological solution that expands equipment functionality. The study involves the analysis of known designs of screening buckets installed on excavators that ensure material separation to be carried out simultaneously with excavation and loading works. It is noted that a promising development direction of screening buckets is a design with working drums. The article presents an excavator with a modernized screening bucket and its operation technology, which allows to start rock mass sorting in the bucket while the excavator is turning to the place of unloading. The improved screening bucket is equipped with a hinged movable bottom controlled by hydraulic cylinders to accumulate fine fractions screened through the working drums. Fine fractions accumulated in the moving bottom are unloaded into a dump truck, after which screening continues directly into the body of the dump truck. Screening finished, the movable bottom closes and the excavator unloads the coarse fractions remaining in the bucket into another vehicle. Unloading is carried out by bucket turning. The combination of screening and excavator turning reduces the operation cycle time, which increases the performance of both the excavator and dump trucks. The use of a modernized screening bucket with a moving bottom eliminates the loss of valuable fine material as a result of spilling when the excavator turns for unloading. The movable bottom can be installed on the screening buckets of known designs and does not require their significant alteration. Application of the proposed technical and technological solution will reduce unit costs and increase the efficiency of work.

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Gao, Kuidong, Xiaodi Zhang, Liqing Sun, Qingliang Zeng, and Kao Jiang. "Complex Effects of Drum Hub Forms and Structural Parameters on Coal Loading Performance." Complexity 2020 (June 10, 2020): 1–19. http://dx.doi.org/10.1155/2020/7036087.

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The extremely poor loading performance of a thin coal shearer drum affects the mining efficiency in thin seam mining seriously on account of the restriction by the complicated mining environment and seam thickness. The coal loading performance of the drum is influenced by several complex factors, such as motion parameters and structural parameters, including the structure and form of the hub. The form of the drum hub is cylindrical in general, and in order to study the influence of the hub form on the coal loading rate of the drum, seven drums with different hub forms and structures were designed. The influence of the complexity of hub structures on the coal loading performance was studied by discrete element method (DEM) simulation in this paper. The change curves with the research object of different drums, such as coal loading rate, velocity field distribution, and contact force between fallen coal particles, were obtained. The results showed that the conical hub drum can improve the coal loading performance than the cylindrical hub drum, and the curve-shaped hub drum had a more obvious promotion on the coal loading performance. The coal loading rate increased first and then decreased with the increase of hub cone angle. Compared with the conical hub drum, the curve-shaped hub drum can not only improve the coal loading rate, but also has a larger space containing coal. This study has proposed a drum with a new form hub which could increase the coal loading rate, and the methods and conclusions provide the guidance for drum hub design.

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Ducasse, Quentin, Cyrille Eleon, Bertrand Perot, Abdallah Lyoussi, Oliver Gueton, Massimo Morichi, Erica Fanchini, et al. "Design of MICADO advanced passive and active neutron measurement system for radioactive waste drums." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1005 (July 2021): 165398. http://dx.doi.org/10.1016/j.nima.2021.165398.

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Miles, Meredith C., Eric R. Schuppe, R. Miller Ligon, and Matthew J. Fuxjager. "Macroevolutionary patterning of woodpecker drums reveals how sexual selection elaborates signals under constraint." Proceedings of the Royal Society B: Biological Sciences 285, no. 1873 (February 21, 2018): 20172628. http://dx.doi.org/10.1098/rspb.2017.2628.

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Sexual selection drives elaboration in animal displays used for competition and courtship, but this process is opposed by morphological constraints on signal design. How do interactions between selection and constraint shape display evolution? One possibility is that sexual selection continues exaggeration under constraint by operating differentially on each signal component in complex, modular displays. This is seldom studied on a phylogenetic scale, but we address the issue herein by studying macroevolutionary patterning of woodpecker drum displays. These territorial displays are produced when an individual rapidly hits its bill on a hard surface, and drums vary across species in the number of beats included (length) and the rate of drumbeat production (speed). We report that species body size limits drum speed, but not drum length. As a result of this biomechanical constraint, there is less standing variation in speed than length. We also uncover a positive relationship between sexual size dimorphism and the unconstrained trait (length), but with no effect on speed. This suggests that when morphology limits the exaggeration of one component, sexual selection instead exaggerates the unconstrained trait. Modular displays therefore provide the basis for selection to find novel routes to phenotypic elaboration after previous ones are closed.

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Caruso, Matteo, Lorenzo Scalera, Paolo Gallina, and Stefano Seriani. "Dynamic Modeling and Simulation of a Robotic Lander Based on Variable Radius Drums." Applied Sciences 10, no. 24 (December 11, 2020): 8862. http://dx.doi.org/10.3390/app10248862.

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Soft-landing on planetary surfaces is the main challenge in most space exploration missions. In this work, the dynamic modeling and simulation of a three-legged robotic lander based on variable radius drums are presented. In particular, the proposed robotic system consists of a non-reversible mechanism that allows a landing object to constant decelerate in the phase of impact with ground. The mechanism is based on variable radius drums, which are used to shape the elastic response of a spring to produce a specific behavior. A dynamic model of the proposed robotic lander is first presented. Then, its behavior is evaluated through numerical multibody simulations. Results show the feasibility of the proposed design and applicability of the mechanism in landing operations.

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Ketenjian, Ara. "Lessons From Kathmandu." International Journal of Yoga Therapy 6, no. 1 (January 1, 1995): 27–33. http://dx.doi.org/10.17761/ijyt.6.1.v61202955178w44h.

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As I read the short announcement about a trip to Nepal, I could smell the aroma of seductive perfumes, hear the distant sound of drums and cymbals, and feel the passion of timeless love in the balmy darkness of star-filled nights. For centuries this mysterious, enchanted land had been an island forbidden to mankind by its geographic design and decree of kings.

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Zheng, Xin Wei, Xue Cong Hu, Zhi Yu Wang, and An Li Miao. "Research on the Connection Type between Evaporating Tube Bundle and a Steam Drum Shell on a Natural Circulation Marine Supercharged Boiler." Applied Mechanics and Materials 618 (August 2014): 448–52. http://dx.doi.org/10.4028/www.scientific.net/amm.618.448.

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The research work, Ascertaining the connection type between evaporating tube bundle and a steam drum shell on a Natural Circulation marine supercharged boiler, is important. For this reason the method, calculating the low-cyle fatigue life of supercharged boiler steam drums put forward by Xin-wei Zheng, et al., was put to use; Based on the relevant basic data from design department and two typical running conditions of one supercharged boiler, the cumulative fatigue damage ratio of welding technique was calculated. The calculated result proves that it exceeds the maximum value of 1.0 and the upper limit value of 0.75 in fossil-fuel power plants, respectively. So welding technique can’t guarantee the low-cycle fatigue life of this steam drum, the only connection type is expanded joint, and the connection type has been put into practice.

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Galkin, Alexey V., Denis G. Fadeev, and Igor V. Uschapovsky. "Studying Quality Characteristics of Flax Fiber Depending on Deseeding Device Design." Mordovia University Bulletin 28, no. 3 (September 20, 2018): 389–99. http://dx.doi.org/10.15507/0236-2910.028.201803.389-399.

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Introduction. The processe of harvesting fiber flax is characterized by tough interactions of the work tools of the flax puller and parts of plants. Different principles and design of work tools for taking out seed bolls from the stem, used in flax harvesting machines, have both advantages and disadvantages. Single-drum comb deseeders are the most effective, but the level of damage to the stems caused during the working of these mechanisms is high. The purpose of this work is the experimental substantiation of constructive changes in the comb deseeder, which allows reducing damage to the stems of the flax fiber in the process of combing and improving the quality of the flax material. Materials and Methods. Fields and laboratories studies of flax harvesting and technological tests of flax straw and fiber were carried out according to the existing methods and standard protocols (GOST). The influence of the harvesting combine speed and deseeder type (the drum for the taking flax balls off by the stems’ combing and for the transporting removed balls to hopper) on the yield and quality of the fiber were determined. The fiber flax variety Alexim (cultivated by All Russian Research Institute for Flax Production, Torzhok) was used as a plant object and the harvesting was carried out in the vegetation stage “yellow stem” – “full ripeness”. Results. The classical design of the combing drum with four ridges for deseeding was changed to three ones that means only one of ridges should be in the layer of flax stems during the combing process. That design could decrease damage to the stems when deseeding stems. Instrumental assessment of fiber shows that after the deseeding by the threeridges drum the quality of flax straw was 0.97–1.09 numbers that was by 0.19–0.28 numbers higher than after using four-ridges drums. Conclusions. The obtained data indicate that the reducing of the load on the flax stems has a positive effect on the quality of the fibrous products. The yield of long fiber increases by 1.27–1.54% (abs.), and the fiber quality – by 0.3 numbers.

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Scalera, Lorenzo, Paolo Gallina, Stefano Seriani, and Alessandro Gasparetto. "Cable-Based Robotic Crane (CBRC): Design and Implementation of Overhead Traveling Cranes Based on Variable Radius Drums." IEEE Transactions on Robotics 34, no. 2 (April 2018): 474–85. http://dx.doi.org/10.1109/tro.2018.2791593.

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HOSOYA, Naoki, Kihachiro TANAKA, Takeshi KANNO, Tetsuya WATANABE, and Teruyoshi SHIROTA. "Dynamic Characteristics of the Bended Thin Plate Structures (Low Vibration Design by Imitating of Caribbean Steel Drums)." Transactions of the Japan Society of Mechanical Engineers Series C 72, no. 721 (2006): 2905–11. http://dx.doi.org/10.1299/kikaic.72.2905.

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Gana Yisa, Mohammed, and Mohammed Mamman Jiya. "The design, fabrication, and performance evaluation of a locust bean boiler." Journal of Applied Biotechnology & Bioengineering 6, no. 6 (November 25, 2019): 271–78. http://dx.doi.org/10.15406/jabb.2019.06.00204.

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African locust bean is a leguminous plant that is rich in nutrients and is used as food condiment. The traditional method of processing this food condiment is mostly unhygienic; consume a lot of fire wood, human energy and time. Using traditional methods for boiling 33.7Kg of locust bean would take about 12 hours. This study attempts to mechanize the existing traditional methods of boiling locust bean by designing, constructing, and evaluating electrically powered locust bean boiler. The boiler consists of three composite drums, each with a cylindrical upper part and conical lower part. The boiling chamber is made of 304 austenitic stainless steel which contains the heating elements. Fibre glass is lodged between the steel materials as an insulator. As power is supplied to the boiler, the elements convert the electrical energy to heat energy attaining the temperature of 200.7°C in 5 minutes. The machine has the capacity of boiling 33.7Kg of locust bean in 1 hour at 90°C. The cost of producing a unit is ₦20,207.5.

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Iranzo, Alfredo, Francisco Pino, José Guerra, Francisco Bernal, and Nicasio García. "Cooling Process Analysis of a 5-Drum System for Radioactive Waste Processing." Energies 11, no. 10 (October 9, 2018): 2689. http://dx.doi.org/10.3390/en11102689.

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A cooling system design for the processing of radioactive waste drums is investigated in this work, with the objective of providing insights for the determination of the air flow rate required to ensure an acceptable slag temperature (323 K or below) after 5 days. A methodology based on both 3D and 2D axisymmetric Computational Fluid Dynamics (CFD) modelling is developed. Transient temperature distributions within the drums in time and space determined by the heat transfer characteristics are studied in detail. A sensitivity analysis is also carried out assuming different physical properties of the radioactive slag. It was found out that for all variations analyzed, the maximum temperature of slag at the end of five days cooling is below 323 K, where the maximum outlet air temperature for a minimum air inlet velocity of 1 m/s is between 320 K and 323 K depending on the radioactive slag properties. When glass-like radioactive slag properties are assumed, the internal heat conduction within the slag is limiting the overall heat transfer, therefore requiring significantly longer cooling times.

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Hrytsaka, O. M. "Theoretical researches of threshing and separation processes of bread mass by the threshing-separating device." Mehanization and electrification of agricultural, no. 12 (2020): 60–66. http://dx.doi.org/10.37204/0131-2189-2020-12-7.

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Annotation Purpose. Theoretical researches of increase of efficiency of working processes of threshing, separation of grain mass by combine harvesters by improvement and use of a multi-drum design of the threshing-separating device with rational design and technological parameters of work capable to provide necessary agrotechnical requirements. Methods. In theoretical researches the analysis of interaction of the threshing-separating device with grain mass with use of mathematical modeling of processes of threshing of grain, separation of a rough heap and their estimation is carried out. Results. The mathematical model of the mobile multi-drum thresher modernized as a result of change of settings that allowed to increase efficiency of its work is considered; the dependences of quality on the design parameters of the threshing-separating device during the implementation of technological processes of grain harvesting due to the reduction of the total level of injuries and grain losses are obtained. Conclusions. A mathematical model of improvement of the threshing process, separation of grain mass in the threshing gap of the threshing-separating device was developed, which allowed to obtain the dependences of the influence of structural and technological parameters on the level of threshing and separation. It is established that a significant reserve for improving the process of threshing, separation of grain mass is changes in the settings of threshing drums. Keywords: combine harvester, mathematical model, threshing-separating device, theoretical research, grain harvesting, threshing process.

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Cao, Guohua, Xiang Cai, Naige Wang, Weihong Peng, and Jishun Li. "Dynamic Response of Parallel Hoisting System under Drive Deviation between Ropes with Time-Varying Length." Shock and Vibration 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6837697.

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The dynamic responses of parallel hoisting system with time-varying length and rigid guidance under drive deviation are investigated considering tension and torsion characteristics of the ropes. The variable-domain three-node elements of rope are employed and the corresponding differential algebraic equations (DAEs) are derived using Lagrange’s equations of the first kind. The slack situation of the rope is considered, and the dynamic equations which are systems of DAEs are transformed to ordinary differential equations (ODEs). The dynamic responses of tension, torsion, and acceleration are analyzed considering radius’ error of the drums, which indicates that the drive deviation between ropes can cause large influence on the tension difference and even cause one of the ropes to slack. However, the torsion of the corresponding rope is active. And unreasonable discordance between ropes should be controlled for the design and manufacture of drum on super deep parallel hoisting system.

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Yangyuen, Suphan, Juckamas Laohavanich, Cherpong Chaiwchanwattana, and Songchai Wiriyaumpaiwong. "Efficient Strip Belt Shelling and Air Suction Cleaning Units for Sunflower Seeds." Advanced Materials Research 1044-1045 (October 2014): 778–83. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.778.

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This study was aimed to design and develop the strip belt shelling and cleaning units for sunflower seeds. The different principles of operation by streak belt consist of number of strips and its configurations: full swath section, 4 – 5 zigzag and 4 eccentric drums. Five different linear velocities of drum 9.75, 10.00, 10.25, 10.50 and 10.75 m/s were evaluated. Pacific sunflower with 9.62% w.b. moisture content was prepared to test the performance of shelling unit. In the cleaning unit, the testing was done at various 1.82 – 3.08 m/s air suction speeds and 30 – 40 degrees plate inclination angles. The shelling result showed the appropriated condition was 4 eccentric drum with the 10.50 m/s linear velocity. The shelling was achieved 80.43% efficiency and 84.36% commercial seeds (whole and small damage kernels) at 15.17 kg/h capacity. The proper condition for cleaning was 2.45 m/s air suction speed and 30 degrees plate inclination angle. Cleaning achievements were 98.64% efficiency and 0.07% kernel loss in suction air.

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Journal articles on the topic 'Drums design'

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