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Journal articles on the topic 'Champfer of rotary component'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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1

Anand, Manish, and Justin Seipel. "The rotary component of leg force during walking and running." Journal of The Royal Society Interface 16, no. 154 (May 2019): 20190105. http://dx.doi.org/10.1098/rsif.2019.0105.

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The component of ground reaction force (GRF) acting perpendicular to the leg in the sagittal plane during human locomotion (acting in a rotary direction) has not been systematically investigated and is not well understood. In this paper, we investigate this rotary component of the GRF of 11 human subjects (mean age ± s.d.: 26.6 ± 2.9 years) while walking and speed walking on a treadmill, along with eight human subjects (mean age ± s.d.: 26.3 ± 3.1) running on a treadmill. The GRF on both legs was measured, along with estimates of the subject's mass centre and the centre of pressure of each foot to yield total leg lengths and leg angle. Across all steady walking and running speeds, we find that the rotary component of the GRF has significant magnitude (peak values from 5% to 38% of body weight, from slow walking to moderate running, respectively) and implies leg propulsion of the mass centre in the rotary direction. Furthermore, peak rotary force magnitude over stance increases with locomotion speed for both walking and running ( p < 0.05), and the time-averaged (mean) rotary force shows a slight increase with walking speed (though the mean force trend is uncertain for running). Also, an estimate of average power input from the rotary force of the leg acting at the mass centre shows moderate and strong positive correlation with locomotion speed for running and walking respectively ( p < 0.05). This study also shows that the rotary force acts differently in walking versus running: rotary force is predominantly positive during running, but during walking it exhibits both positive and negative phases with net positive force found over the whole stride.
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2

Sichalwe, K., I. Govender, and A. N. Mainza. "Characterising porosity of multi-component mixtures in rotary mills." Minerals Engineering 24, no. 3-4 (February 2011): 276–81. http://dx.doi.org/10.1016/j.mineng.2010.08.027.

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3

Elsamanty, M., W. S. Salman, and A. A. Ibrahim. "Rotary Machines Fault Diagnosis based on Principal Component Analysis." Engineering Research Journal 171 (September 1, 2021): 138–50. http://dx.doi.org/10.21608/erj.2021.193822.

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4

Kim, Do-Hyun, Ji-Young Kim, and Myeong-Han Kim. "Evaluation on Structural Performance of Two-nodal Rotary Frictional Component." Journal of the Korean Society for Advanced Composite Structures 6, no. 4 (December 30, 2015): 51–57. http://dx.doi.org/10.11004/kosacs.2015.6.4.051.

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5

Lozano-Osorno, Fernando, and Oliver Hensel. "Hay Component Sieving by a Rotary Sieve with Lifting Flights." Drying Technology 32, no. 13 (August 15, 2014): 1560–67. http://dx.doi.org/10.1080/07373937.2014.907303.

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6

Perminov, Andrey, Yuri Lukyanov, Sergey Tikhonov, and Alexander Ilyin. "Thermodynamic cycle with two-component working fluid." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (June 17, 2015): 241. http://dx.doi.org/10.17770/etr2015vol2.261.

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<p>The article deals with the implementation of the thermodynamic cycle using the two-component working fluid. An estimated calculation of the efficiency of using the two-component working fluid, and a variant implementation of the thermodynamic cycle rotary vane engine with an external heat supply are described.</p>
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7

Zheng, Wen. "Analysis of Satellite Coupled Dynamics Simulation Based on the Virtual Lab." Advanced Materials Research 850-851 (December 2013): 387–90. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.387.

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Based on the Virtual. Lab software, this paper used multi-rigid body dynamics and soft multi-body dynamics theory as the foundation to establish the satellite coupled virtual prototype model including rotary table, rotating arm and the antenna. The simulation model is used to analyze the influence of the flexible rotary arm body on the satellite and obtain the rotating arm stress and deformation under the coupled conditions, which provides theory basis for the satellite design, the material selection of satellite rotary arm and other key component, and strength check under coupling dynamic load conditions. At the same time, this provides data support for the fatigue reliability research of future satellite key component.
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8

Wong, C. C., A. Danno, K. K. Tong, and M. S. Yong. "Cold rotary forming of thin-wall component from flat-disc blank." Journal of Materials Processing Technology 208, no. 1-3 (November 2008): 53–62. http://dx.doi.org/10.1016/j.jmatprotec.2007.12.123.

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9

Yeon Taek OH. "Study of inspection technique for precision component on indexing table." Global Journal of Engineering and Technology Advances 5, no. 3 (December 30, 2020): 001–12. http://dx.doi.org/10.30574/gjeta.2020.5.3.0104.

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This work presents inspection method for component of indexing table. The indexing table employs a vee and 3 balls kinematic location system. The 6 points contact kinematic design concept of ball and vee groove was used, because the ball and vee groove system can attain good repeatability and has good rigidity. The vee plays an important role as the indexing angle and locking mechanism. Also eccentricity is an important factor as alignment between the rotation center of the rotary table. So, the concentricity between the center of the vee plate and the center of the rotary table is required to be as close as possible to make an accurate vee plate. The indexing table uses the kinematic design concept of vees and balls. But contact stress in the vee is often very high, so the plastic deformation could occur on the vee due to the loaded balls. The elastic deformation of cam shaft is described in this paper.
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10

Feng, Hao, Hao Zhao, and Li Jun Ding. "Experimental Study of Angular Acceleration Sensor and its Error Analysis." Applied Mechanics and Materials 105-107 (September 2011): 1930–35. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1930.

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For shaft angular acceleration is the key to rotary system state inspection and fault analysis, two new angular acceleration sensors based on the principle of electromagnetic induction are presented. When the angular acceleration component exist in rotary system, this component is output in the form of induced potential through electromagnetic coupling. The output voltage of sensor can reflect the changes of mechanical angular acceleration according to the experiment. The errors of sensor on actual working condition are analysed, and a new calibration method of sensor is presented, which affords technical support for the popularization and application of sensor.
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11

Chen, Jie, Gang Bai, Zhongmin Shen, Xiaofeng Li, David Fulton, and Andrew Hsu. "Prediction of Failure Rate of Rotary Machine Using Computer Simulations." Journal of Manufacturing Science and Engineering 127, no. 4 (March 14, 2005): 768–72. http://dx.doi.org/10.1115/1.2037088.

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Failures can occur in brushless alternators due to interferences between the moving and stationary parts, called “rub.” Improper design of component target dimensions and tolerances can result in interferences. A method was developed to evaluate the component tolerances that can create interference in a brushless alternator. Mathematic models were created to relate target dimensions to the interferences. Monte Carlo simulation was utilized to statistically evaluate the effects of tolerances on failure rate. This method allows a designer to avoid potential rub failures while still in the design phase. It can also be used to analyze rotary machines of similar designs.
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12

Luo, Yan Lei, Cong Guo Xu, and Qiu Yan Zhang. "Research on Dynamic Characteristics of Anti-Reverse Valve for Hydraulic Excavator Rotary Motor." Advanced Materials Research 871 (December 2013): 290–95. http://dx.doi.org/10.4028/www.scientific.net/amr.871.290.

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Hydraulic excavator slewing system is an important component of the excavator and its core-component is the rotary motor. When the rotary hydraulic system starts, stops, and reciprocating works, dynamic characteristic of rotary motor anti-reverse valve has a great influence for working condition of the whole system. Through researching working principle of hydraulic system anti-reverse valve, establish dynamic mathematical model of anti-reverse valve, analyze dynamic response of the model, and get the theoretical foundation of the impact of anti-reverse valve middle chamber throttle opening on hydraulic system. According to the actual working condition of the excavator slewing hydraulic system, establish the system AMESim simulation model, take different parameters of the anti-reverse valve throttle opening, conduct simulation and analysis of the anti-reverse valve characteristics, and validate throttle opening has a great influence on dynamic characteristics of the hydraulic system.
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13

Luo, You Xin, Heng Shu Li, and Hui Jun Wen. "Research on Rotary Power Head of Drill with Higher-Order Elliptic Profile End Surface Movable Tooth Transmission." Advanced Materials Research 179-180 (January 2011): 846–50. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.846.

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A rotary power head is a key component of the cutting drill. In this paper, first, we researched the current situation of the rotary power head; Second, we proposed a new retard device called higher-order elliptic end surface movable tooth transmission, and then designed a new rotary power head based on this device. The moving parts in the transmission such as input and output shafts are self-balancing, so the transmission can achieve the random tooth difference. A rotary power head of a drill with this transmission has many advantages, such as convenient disassembly or loading, large transmission torque, small radial size and the suitability for heavy loads. Finally, 3D model based on Solidworks2010 was established.
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14

Langrish, T. A. G., S. E. Papadakis, and C. G. J. Baker. "RESIDENCE TIMES OF TWO- AND THREE-COMPONENT MIXTURES IN CASCADING ROTARY DRYERS." Drying Technology 20, no. 2 (February 2002): 325–50. http://dx.doi.org/10.1081/drt-120002545.

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15

Perekrestov, Arshavir P., Ali Salameh, Vasiliy A. Chanchikov, Ivan N. Guzhvenko, and Abdullahi Y. Abubakarov. "A STUDY ON OPERATIONAL PROPERTIES OF ANTI-WEAR ADDITIVES FOR MOTOR LUBRICATING OILS DEPENDING ON THEIR PROCESSING AND SEDIMENTATION." Russian Journal of Water Transport, no. 64 (August 29, 2020): 110–23. http://dx.doi.org/10.37890/jwt.vi64.102.

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The article presents studies on the dependence of sedimentation resistance of the anti-wear additive solid component for marine diesel trunk-type internal combustion engines on the technological conditions of its manufacturing. A friction modifier, molybdenum diselenide, which has optimal anti-wear properties, was selected as a solid component. The authors consider the process of sedimentation of a given substance, stabilized in the volume of an additive solution with unsaturated acids, at different times of rotary stirring, and under the influence of subsequent treatment of the prepared solution with ultrasound. The mass of the solution solid component is studied as irretrievably precipitated over various periods of storage time of the additive solutions, subjected to rotary stirring and additional ultrasonic treatment. The recommended storage time of the considered anti-wear additive with a 10% content of molybdenum diselenide has been established.
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16

Jia, Guohai, Lijun Li, and D. M. Zhang. "Effect Analysis on Combustion and Emission Characteristics of a Rotary Burner Fueled by Biomass Pellet Fuel." Journal of Chemistry 2020 (July 21, 2020): 1–12. http://dx.doi.org/10.1155/2020/3618382.

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A biomass pellet rotary burner was chosen as the research object, in order to study the influence of excess air coefficient on the combustion phenomenon of biomass rotary burner, the finite element simulation model of a biomass rotary burner was established, and simulation results of a biomass rotary burner were verified by the experiment. The computational fluid dynamics software was applied to simulate the combustion characteristics of biomass rotary burner in a steady-state condition, and the effect of excess air coefficient on temperature field and component concentration field in biomass rotary burner was analyzed. The results show that the flue gas flow rate inside the burner gradually increases with the increase of air velocity, the area with large temperature is mainly concentrated in the middle region of the rotary burner, and the maximum combustion temperature also appeared in the middle region of the combustion chamber, and the formation area of CO decreases with the increase of excess air coefficient. CO2 is mainly concentrated in the middle region of the burner, and the CO2 generating region decreases with the increase of excess air coefficient. The experimental value of the combustion temperature of the biomass rotary burner is in good agreement with the simulation results.
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17

Luo, You Xin, Heng Shu Li, and Hui Jun Wen. "Research on Rotary Power Head of Rock Driller with Higher-Order Elliptic Profile Movable Tooth Transmission." Advanced Materials Research 179-180 (January 2011): 841–45. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.841.

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Rotary power head is a key component of the cutting drill. After researching the current situation of the rotary power head, this paper proposed a new device called higher-order elliptic profile movable tooth transmission, and applied this device to the cutting drill, then designed a new rotary power head based on this device. The moving parts in a higher-order elliptic profile movable tooth transmission are self-balancing, such as the input shaft and the output one. The transmission can achieve the random difference of the teeth. A rotary power head of a drill with this transmission has many advantages, such as convenient disassembly or loading, large transmission torque, small radial size and the suitability for heavy loads. Finally, 3D model based on Solidworks2010 was established in this paper.
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18

Mangas, Ángela, Maite Santos, Jose Ignacio Zarazua, Juan San José, Garbiñe Atxaga, and Olatz Adarraga. "Sensitivity Analysis to Optimise the Microstructural Properties of an Inconel 718 Component Manufactured by Rotary Forging." Key Engineering Materials 554-557 (June 2013): 234–47. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.234.

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Microstructural behaviour of Inconel 718 using rotary forging as forming process is presented in this paper. This work is the continuation of a previous one, presented in ESAFORM 2012, in which the numerical model was described and previous results about microstructural behaviour were shown. Several simulations are carried out in order to investigate the effect of initial grain size, temperature and strain rate in microstructure. Experimental tests are done in order to validate the numerical results, analyzing the final microstructure. Preparation of the experimental equipment is shown: heating tool system, thermal isolation technique, tool design for the integration of the heating and the isolation system. Heat loss during the transfer operation between furnace and rotary forging machine is measured experimentally, in order to obtain a precise initial temperature value of the part at the beginning of the process. The experimental tests allow validating the simulation work, obtaining the real input parameters for the numerical calculation. Two ways of forming are obtained depending on the initial grain size. The optimal combination of the rotary forging process parameters listed above is determined in achieving a fine and homogeneous microstructure.
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19

Liu, Zhen Fa, Yun Juan Wu, Li Hui Zhang, Hao Lin Fu, and Xuan Liu. "Research on Performances of Environmentally Friendly Multi-Component Corrosion Inhibitor." Advanced Materials Research 813 (September 2013): 382–86. http://dx.doi.org/10.4028/www.scientific.net/amr.813.382.

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A new multi-component corrosion inhibitor was prepared from itaconic acid homopolymer, polyepoxysuccinic acid ,polyaspartic acid derivative and sodium gluconate. The preformances of the corrosion inhibition and biodegradability were studied by rotary hanging piece weight-loss tests,electrochemical and biodegradability tests. The corrosion test piece was observed by SEM.The results showed that the multi-component corrosion inhibitor had good performances of corrosion inhibition and biodegradability.
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20

Yuan, A. F. "Inverse Design of Cam Contour by NURBS Spline." Key Engineering Materials 426-427 (January 2010): 230–34. http://dx.doi.org/10.4028/www.scientific.net/kem.426-427.230.

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In this paper, according to the requirements of some cam component in rotary press, cubic NURBS spline is used to generate the contour of cam after calculating every control point on the basis of movement requirement of driven part. And software ADAMS is used to verify the calculation result. Results show this method is an effective way for manufacturers of rotary press to generate cam contour, which can improve the performance of cam mechanism and save much time.
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21

Bakr, E. M., and A. A. Shabana. "Application of Timoshenko Beam Theory to the Dynamics of Flexible Legged Locomotion." Journal of Mechanisms, Transmissions, and Automation in Design 110, no. 1 (March 1, 1988): 28–34. http://dx.doi.org/10.1115/1.3258900.

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A method for the dynamic analysis of flexible legged locomotion systems that accounts for the rotary inertia and shear deformation effects is presented. The motion of the flexible components in the legged vehicle is described using a set of inertia-variant Timoshenko beams that undergo large rotations. A shape function that accounts for the combined effect of rotary inertia and shear is employed to describe the deformation relative to a selected component reference and the rigid-body modes of the shape function are eliminated using a set of reference conditions. Kinetic and strain energies are derived for each Timoshenko beam, thus identifying the beam mass and stiffness matrices which account for the rotary inertia and shear deformation effects. A new set of time-invariant matrices that describe the nonlinear inertia coupling between the reference motion and elastic deformation and account for the rotary inertia and shear is developed and it is shown that the form of these matrices as well as the mass and stiffness matrices are significantly affected by the inclusion of rotary inertia and shear. Numerical experimentations indicate that shear and rotary inertia can have a significant effect on the dynamics of flexible legged locomotion.
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22

Guo, Hong, and Hai Long Zhang. "Finite Element Method Analysis of the Mast of Rotary Drilling Rig." Advanced Materials Research 374-377 (October 2011): 326–29. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.326.

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The mast is an important support and loading component of the executive mechanism of rotary drilling rig, and plays a very essential role during the normal operating process for the whole machine. According to the work characteristics of the rotary drilling rig, the stress and deformation of the mast structure were calculated under the extreme conditions of two typical operations, which are drill-extracting and drilling conditions. The results show that the stress concentrated areas are located near the two connecting hinged joints between the mast and support cylinder and tripod under working conditions, and the results obtained from this paper can provide a theoretical reference for the design of the rotary drilling rig mast.
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23

Wang, Zai Jin, and Qiang Li. "The Spindle Component Analysis of Inner Cavity Shaping Machine Tool." Advanced Materials Research 740 (August 2013): 170–77. http://dx.doi.org/10.4028/www.scientific.net/amr.740.170.

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This paper takes the spindle of inner cavity shaping machine tool as the research object, analyzes the spindle structure of the machine tool and establishes the equations of motion, analyzes the influence that the spindle speed and tool deflection speed have on the tool rotary speed using Matlab and ADAMS, determines the allowed deflection range of the tool, sets up the transfer function of the servo motor current loop and analyzes the stability of spindle servo motor current loop .
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24

Lin, Jie Qiong, Lei Wang, Ming Hui Gao, and Tong Huan Ran. "Research on Load-Bearing Characteristics of Precision Air-Bearing Rotary Stage." Advanced Materials Research 479-481 (February 2012): 2129–34. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.2129.

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Air-bearing is a core component of air-bearing rotary stage. The weakness that the air-bearing has the low load capacity and stiffness has been concerned about by domestic and foreign scholars. So how to improve the load capacity and stiffness has become a serious problem. In order to improve the load capacity and stiffness of the air-bearing rotary stage, in this paper, we improved structure of Zhang Wenjie and others’ high-precision direct-drive air-bearing rotary stage. The gas film of air-bearing has been meshed by GAMBIT software, and we use FLUENT software to obtain the carrying capacity features of the gas film. Finally, the structural static force of the precision air-bearing rotary stage will be analyzed by ANSYS software. The analysis results show that: the structural design of the precision air-bearing rotary stage is reasonable, and this structure can provide a larger range of loads. Even in heavy load conditions, a larger deformation will not occur any more. It has a good practical value, and also can be widely used in high precision equipments.
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25

Zhang, Xiaosong, Qi Gao, Qiang Gao, Xin Yu, Tinghai Cheng, and Zhong Lin Wang. "Triboelectric Rotary Motion Sensor for Industrial-Grade Speed and Angle Monitoring." Sensors 21, no. 5 (March 2, 2021): 1713. http://dx.doi.org/10.3390/s21051713.

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Mechanical motion sensing and monitoring is an important component in the field of industrial automation. Rotary motion is one of the most basic forms of mechanical motion, so it is of great significance for the development of the entire industry to realize rotary motion state monitoring. In this paper, a triboelectric rotary motion sensor (TRMS) with variable amplitude differential hybrid electrodes is proposed, and an integrated monitoring system (IMS) is designed to realize real-time monitoring of industrial-grade rotary motion state. First, the operating principle and monitoring characteristics are studied. The experiment results indicate that the TRMS can achieve rotation speed measurement in the range of 10–1000 rpm with good linearity, and the error rate of rotation speed is less than 0.8%. Besides, the TRMS has an angle monitoring range of 360° and its resolution is 1.5° in bidirectional rotation. Finally, the applications of the designed TRMS and IMS prove the feasibility of self-powered rotary motion monitoring. This work further promotes the development of triboelectric sensors (TESs) in industrial application.
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26

Ishkina, Svetlana, Bernd Kuhfuss, and Christian Schenck. "Influence of the relative rotational speed on component features in micro rotary swaging." MATEC Web of Conferences 21 (2015): 09012. http://dx.doi.org/10.1051/matecconf/20152109012.

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27

MURAKI, Tatsuya, Takahiro KONDOU, Hiroki MORI, Kenichiro MATUZAKI, and Nobuyuki SOWA. "Vibration Control of a Rotary Crane by Elimination of the Natural Frequency Component." Proceedings of the Dynamics & Design Conference 2020 (August 25, 2020): 129. http://dx.doi.org/10.1299/jsmedmc.2020.129.

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28

Shi, Lei, Chun Dong Zhu, Xin Liu, and Yi Zhang. "Optimum design of the double roll rotary forging machine frame." Mechanical Sciences 11, no. 1 (April 7, 2020): 101–14. http://dx.doi.org/10.5194/ms-11-101-2020.

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Abstract. The equipment to realize the rotary forging technology is called the rotary forging machine. Compared with the common forging equipment, machine frame will bear a large torsion force in the working process, and the load in the forming process will eventually act on the rotary forging machine frame, and cause it to deform, thus affecting the rolling situation of the workpiece. Therefore, good frame performance is the premise to achieve stable rotary forging. The good performance of the frame is closely related to the structural design and structural optimization. However, at present, there are few researches on the overall optimization design of the rotary forging machine, and the lightweight technology has become the current trend. In the early manufacturing of low tonnage rotary forging machine, the lightweight design is not paid enough attention to, even if it meets the use performance, but the machine is bulky, which seriously reduces the utilization rate of materials and increases the manufacturing costs. In this paper, based on the existing rotary forging machine, the topological optimization of the main body of the rotary forging machine is carried out, and then the sensitivity analysis of the thickness of each component of the machine frame to the performance of the frame is studied, which provides the basis for the follow-up size optimization. Finally, the experimental verification is carried out, and it is found that the work pieces of the rotary forging are relatively good, which shows that the optimization scheme is reasonable and can be reduced on the premise of satisfying the performance weight, saving manufacturing cost.
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29

Li, Xiang, Hong Liang Wang, and Rui Hong Zhang. "Based on NX NASTRAN Finite Element Analysis of Rotary Blade Axis." Applied Mechanics and Materials 397-400 (September 2013): 656–61. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.656.

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Rotary tillage is the most common method of modern farming land and the key component which transmits torque and bears soil counterforce and pound. Rotary blade axis（1GBF-12A）was studied in this paper using 3D design software(UG) and finite element analysis software(NX NASTRAN) to establish model analysis and static analysis. The result that the vulnerable area is at the middle of Blade Axis was obtained. The strongest bending stress and position of the Blade Axis is calculated. The research offers theoretical basis for improving future design.
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30

Imaduddin, Fitrian, Saiful Amri Mazlan, Hairi Zamzuri, and Mohd Azizi Abdul Rahman. "Bypass Rotary Magnetorheological Damper for Automotive Applications." Applied Mechanics and Materials 663 (October 2014): 685–89. http://dx.doi.org/10.4028/www.scientific.net/amm.663.685.

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A novel concept of bypass rotary Magneto-rheological (MR) damper is studied in the automotive suspension application. The proposed design is developed based on a vane-type damper structure with an MR control valve located outside of the damper. The design is intended to enhance the ease of maintenance and to reduce the thermal effect from the coil to the MR fluid. The valve is the key component of the damper that exploits the advance characteristics of MR fluid in which have sensitive rheological properties to magnetic field. The ability of the valve to modify the strength of magnetic field has given an advantage that the valve can be operated without any moving parts. The elimination of these parts in the throttling mechanism of the valve will provide benefit in terms of product lifetime and responsiveness. The main objective of this paper is to elaborate the advantages of the bypass rotary MR damper and to demonstrate the damper performance through force-velocity characteristics. The analytical model of the damper is developed and used in the determination of the force-velocity curves and the equivalent damping coefficients.
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31

Ma, Rong Fei, Chun Dong Zhu, Yu Fan Gao, and Zi Hao Wei. "Research on forming technology of rotary forging with double symmetry rolls of large diameter : thickness ratio discs." Mechanical Sciences 12, no. 1 (June 10, 2021): 625–38. http://dx.doi.org/10.5194/ms-12-625-2021.

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Abstract. Rotary forging with double symmetry rolls (DSRs) is a new metal plastic forming technology developed on the basis of conventional rotary forging with a single roll, which uses a pair of symmetrical cone rolls to realize continuous local pressure plastic deformation of the workpiece. Large-diameter, thin discs are a key component in nuclear power, aerospace, deep-sea exploration, and other fields. At present, the forming process of large-diameter discs mainly includes welding and multiple local upsetting, but these processes exhibit many defects and can not meet the requirements of industry. In this paper, a large diameter : thickness ratio disc is integrally formed by rotary forging with DSRs. Using theoretical calculation and finite element simulation methods, the stable rolling conditions and calculation formulas of force and power parameters of rotary forging with DSRs of a large diameter : thickness ratio disc are derived. Based on the reliable three-dimensional rigid-plastic finite element model, the plastic deformation characteristics of rotary forging with DSRs of discs are studied, the reliability of the stable rolling conditions and the calculation formulas of force and power parameters are verified, and the defects and causes of unstable rolling conditions are analysed. An experiment was carried out on a rotary forging press developed with double symmetry rolls, and the experimental results are in good agreement with simulation results, which demonstrated that rotary forging with DSRs is a reliable technology for forming large diameter : thickness ratio discs. The results of this research are helpful to promote the further development of rotary forging with DSRs.
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32

Zhang, Lingtan, Yue Shen, Long Wang, Jia Jia, and Lingzhi Wei. "Rotation Speed Control of the Rotary Valve in MWD Tools Based on Speed Feedforward Compensation." Mathematical Problems in Engineering 2021 (April 5, 2021): 1–8. http://dx.doi.org/10.1155/2021/5565672.

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The rotary valve speed control, seriously affected by the nonlinear characteristic of rotary valve load torque, affects the generation of drilling fluid pressure phase shift keying (PSK) signal and its quality. The calculation model feedforward of the load torque acts on the speed control system and enables the motor voltage to change according to the law of calculation model, and the linearization correction of the speed system is performed. Additionally, the flow measurement is introduced into the calculation model of the load torque to track the load torque change with the flow, suppressing the influence of large changes in flow rate on open-loop control of rotary valve speed. The closed-loop proportional-integral-derivative (PID) control is formed by negative feedback of speed, and the PID parameter value rule is established based on the rapid decay control of transient component in the rotary valve speed step response, which speeds up the tracking of the rotary valve speed following the control voltage pulse and reduces the distortion of the drilling fluid pressure PSK signal, increasing the frequency of the drilling fluid pressure carrier and improving the transmission rate of downhole information. Simulink simulation indicates that the closed-loop PID control of rotary valve speed can track the change of control voltage pulse quickly and strongly suppress the interference influences from flow measurement error and load torque calculation model deviation.
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33

Yang, B., C. S. Suh, and A. K. Chan. "Characterization and Detection of Crack-induced Rotary Instability." Journal of Vibration and Acoustics 124, no. 1 (July 1, 2001): 40–48. http://dx.doi.org/10.1115/1.1421053.

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System instability and chaotic response are the failure modes that could significantly impact the reliability and operating safety of high-speed rotor-dynamical machines. Initiation and propagation of surface cracks in rotary shafts are common causes for such failure modes. To be able to detect the onset and progression of these faults will considerably extend the lifetime and improve the reliability of the mechanical system. A wavelet-based algorithm effective in identifying mechanical chaotic response has been applied to determine the nonlinear dynamical characteristics of a model-based, cracked rotor. This investigation confirms reported correlation of surface crack breathing with rotor chaotic motions. The effectiveness of the algorithm in detecting rotor-dynamic instability induced by mechanical faults as contrast to algorithms that are based on nonlinear dynamics is discussed. The results show not just the feasibility of the algorithm in mechanical fault diagnosis but also suggest its applicability to in-line, real-time condition monitoring at both the system and component levels.
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34

Bulej, Vladimir, Ivan Kuric, and Adrian Popescu. "The Mould Design for Production of Plastic Component by Injection Moulding Technology." Applied Mechanics and Materials 808 (November 2015): 161–66. http://dx.doi.org/10.4028/www.scientific.net/amm.808.161.

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The article deals with the design of the mould for plastic component production by injection moulding technology. There are described the basic steps of whole design process how to choose and design the suitable components with respect to fulfilling the technology requirements necessary for high quality products. The mould contains also the rotary cores with respect to the shape and dimensions of produced part, especially the thread surfaces. The mould flow analysis was carried out for the functionality demonstration.
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35

Benanti, Enzo, Cesare Freda, Vincenzo Lorefice, Giacobbe Braccio, and Vinod Sharma. "Simulation of olive pits pyrolysis in a rotary kiln plant." Thermal Science 15, no. 1 (2011): 145–58. http://dx.doi.org/10.2298/tsci090901073b.

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This work deals with the simulation of an olive pits fed rotary kiln pyrolysis plant installed in Southern Italy. The pyrolysis process was simulated by commercial software CHEMCAD. The main component of the plant, the pyrolyzer, was modelled by a Plug Flow Reactor in accordance to the kinetic laws. Products distribution and the temperature profile was calculated along reactor's axis. Simulation results have been found to fit well the experimental data of pyrolysis. Moreover, sensitivity analyses were executed to investigate the effect of biomass moisture on the pyrolysis process.
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36

Guan, Dong, Li Jing, Junjie Gong, Zhengwei Yang, and Hui Shen. "Friction and wear modeling of rotary disc in spherical pump." Industrial Lubrication and Tribology 71, no. 3 (April 8, 2019): 420–25. http://dx.doi.org/10.1108/ilt-12-2017-0369.

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PurposeRotary disc is a key component in the compact spherical pump, connecting shaft and piston, bearing hydraulic force conformally and constituting dynamic working chambers alternatively. Motion of rotary disc comprises two components. One is rotating around its own axis and the other is sliding on a cone surface. Therefore, it is necessary to investigate the friction and wear mechanism between rotary disc and cylinder under a complicated operation condition.Design/methodology/approachStructural properties of rotary disc are analyzed first. Frictional moment of rotary disc is modeled based on its structural characteristics and working mechanism, and the constraints of the structural parameters are considered. Besides, the concept of dimensionless contact area is proposed. Comparison is performed between the proposed concept and the frictional moment to determine an optimized beginning angle for spherical pump with a given displacement. The wear model of rotary disc is also established based on its kinematic property, a velocity coefficient is proposed and its common values are presented.FindingsEffects of structural parameters, i.e. beginning angle and ending angle on the frictional moment, are obtained quantitatively. The frictional moment increases with beginning and ending angle with different rates. While the dimensionless contact area decreases with beginning angle. The larger the piston angle, the larger the velocity coefficient will be. The rotary disc wears severely with a larger beginning angle and smaller ending angle, while it has the smallest wear rate under a smaller beginning angle and a larger ending angle.Originality/valueThe originality lies in modeling the complex contact force of rotary disc based on its specific structure. These conclusions can be used to optimize the structural parameters of rotary disc.
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37

Chen, Yong, Mei Fa Huang, Bo Shi, Meng Meng Xiao, Ru Kai Hu, and Jiang Sheng Tang. "Kinematic Analysis and Simulation of an A/C Axes Bi-Rotary Milling Head with Zero Transmission." Advanced Materials Research 625 (December 2012): 146–50. http://dx.doi.org/10.4028/www.scientific.net/amr.625.146.

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Because of the flexible kinematic characteristic of five-axis-linkage machining center it is widely used to process complex parts. The milling head is the key functional component of the five-axis machining center, therefore study of the milling head is of vital importance. The A/C axes bi-rotary milling head is the most common used structures. The current mechanical A/C axes bi-rotary milling head is mostly with large volume and small rotation range. This paper presents an A/C axes bi-rotary milling head with zero transmission in small volume. To understand the kinetic characteristics of the A/C axes bi-rotary milling head with zero transmission, we apply D-H parameter method to establish displacement equations, speed equations, and acceleration equations. SolidWorks is then utilized to build the virtual prototyping model of the designed mechanism. Motion module of SolidWorks is also used to carry out the kinematics simulation. The experimental results show that the mechanism could achieve the rotation of A/C axes and smooth motion trajectory. The rotation range of A-axis could reach ±120°.
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38

Liu, Xiao Kang, Ye Tai Fei, D. Peng, and X. Wang. "Predictive Measurement Method for Time Grating Displacement Sensor." Key Engineering Materials 381-382 (June 2008): 403–6. http://dx.doi.org/10.4028/www.scientific.net/kem.381-382.403.

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Time grating displacement sensor is briefly introduced for measuring space with time. The measured values of time grating will not update during the measuring period. To use the sensor as position feedback component for CNC rotary table positioning servo control, this paper firstly introduces prediction conception to measurement field, and predictive measurement method is firstly proposed. Predicted values are derived form past measured values and the prediction error is corrected in real time using the new measured values. The positioning accuracy of the CNC rotary table is improved greatly. Experiment results conform the validity of the proposed method.
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39

HOFFMANN, ERROL R. "Strength of component principles determining direction of turn stereotypes-linear displays with rotary controls." Ergonomics 40, no. 2 (February 1997): 199–222. http://dx.doi.org/10.1080/001401397188305.

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40

Prtenjak, M. T., Z. Pasarić, M. Orlić, and B. Grisogono. "Rotation of sea/land breezes along the northeastern Adriatic coast." Annales Geophysicae 26, no. 7 (June 18, 2008): 1711–24. http://dx.doi.org/10.5194/angeo-26-1711-2008.

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Abstract. The diurnal evolution of the sea/land breeze hodographs over the northeastern Adriatic coast has been examined for several episodes, each lasting a few days. A limited set of observations, as well as the results of a three-dimensional nonhydrostatic mesoscale model are studied by applying a rotary-component method. This revealed a spatial distribution of the clockwise versus anti-clockwise rotation of the wind vectors for the sea/land breeze events. An application of the rotary-component method to the results of additional numerical sensitivity tests showed that the coastal topography height considerably influences both the shape of the wind hodographs and the sense of wind rotation. The method also displayed which areas are under a strong influence of the 24-h topographic forcing and which areas show a large wind consistency. A further analysis of the 24-h modeled wind hodographs at several selected stations has been performed, thus revealing the hodograph shapes and the reasons for them.
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41

Han, Lin, Lixin Xu, and Fujun Wang. "Study on torsional stiffness of transmission employed in a rotary table." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 19 (August 8, 2016): 3541–55. http://dx.doi.org/10.1177/0954406215613116.

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Torsional stiffness of a rotary table plays an important role in the static and dynamic characteristics of a rotary feed drive system. This paper proposes an effective approach to estimate the torsional stiffness of a worm geared transmission usually employed in rotary table. First, the stiffness models of each component used in the transmission are extracted. Then, an expression for the coefficient relating angular displacements is derived and a general torsional stiffness model for the rotary feed drive is developed, taking the time-varying mesh stiffness into account. Finally, a stiffness test scheme is presented and conducted to verify the proposed stiffness model. Furthermore, the influences of the gear’s parameters on the resultant torsional stiffness are investigated based on the developed model. Results indicate the necessity to incorporate a time-varying mesh stiffness when the torsional stiffness of the rotary table is under estimation. Also, a high-frequency variation in profile of torsional stiffness is induced by the mesh stiffness of gear pairs at the high-speed stage. Parametric studies show that tooth width and number of teeth of the driven gear at low-speed stage are more sensitive to stiffness than those at high-speed stage. However, the number of teeth of the driving gears introduces different effects onto the torsional stiffness. The presented model can be used to estimate the torsional stiffness of a rotary feed system efficiently, especially during the preliminary design stage.
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42

Tian, Fang, Guang Ming Liu, and Ke Tao. "Structure Analysis to the Rotary Wheel of a Tire Testing Machine." Applied Mechanics and Materials 215-216 (November 2012): 70–73. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.70.

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Rotary Wheel is important component of the tire testing machine. The natural frequency of the wheel will be determine by it's structure, and these concern the performance of the tire testing machine. Through model analysis a reasonable structural style of the wheel was determined. Dynamic property of the wheel affected by structural parameters was also discussed in the paper. From the Analysis above reasonable parameters of the wheel were determined and sufficient natural frequency was ensured.
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43

Shi, Bo, Mei Fa Huang, Yong Chen, Ru Kai Hu, Wu Jun Yang, and Jian Sheng Tang. "Finite Element Static Stiffness Analysis of the A/C Axes Bi-Rotary Milling Head." Advanced Materials Research 655-657 (January 2013): 1195–99. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1195.

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A/C axes bi-rotary milling head is an important functional component in gantry type five-axis CNC machine tool. The static characteristics affect directly the machining accuracy of machine tool. The paper investigates the static stiffness of A/C axes bi-rotary milling head in gantry type five-axis CNC machine tool XK2320-5X developed by a domestic company. Because this product developed depend on the experience of designers, the machining accuracy of A/C axes bi-rotary milling head of primitive XK2320-5X type cannot meet the accuracy requirement under actual working conditions. On the basis of structure design, the static stiffness analysis of the milling head under two working conditions is carried out using finite element method. The deformations of the main mechanical parts in the milling head are obtained. The analysis results indicate that the static stiffness in direction X is the weakest of the milling head and the milling head shell is the most important factor of deformation. The work done provides foundation for further structure design and machining accuracy improvement of A/C axes bi-rotary milling head.
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Nguyen, Van Tho, Arkady N. Soloviev, M. A. Tamarkin, and I. A. Panfilov. "Finite Element Modeling Method of Centrifugally Rotary Processing." Applied Mechanics and Materials 889 (March 2019): 140–47. http://dx.doi.org/10.4028/www.scientific.net/amm.889.140.

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In the present work, the process of interaction of an abrasive particle with the surface of a component is modeled in the framework of dynamic problems of the theory of thermoelasticity, considering plastic deformation, friction and wear of the surface in the contact region. Two boundary contact problems are considered. The first problem deals with the contact interaction of an element of an abrasive particle in the form of a truncated cone and the surface of a part. The circle of smaller diameter of the cone contacts the surface of the part taking into account the friction and plastic deformation of this surface. Kinematic or force boundary conditions are applied to the circle of greater diameter. In the case of kinematic conditions, the normal and tangential displacements of the circle and its rotation are specified. In the case of force conditions, the force and moment are given. In the second task, the hard stamp slides at a constant speed along the flat boundary of the workpiece, the value of the die insertion is set. In the contact area, the sliding friction force is expressed through normal pressure and heating due to the friction and wear. The stress and temperature fields near the contact region are investigated.
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45

Kim, Do-Hyun. "Evaluation on Structural Performance of Hybrid Friction Damper Components I: One-nodal Rotary Frictional Component." Journal of Korean Society of Hazard Mitigation 14, no. 2 (April 30, 2014): 43–50. http://dx.doi.org/10.9798/kosham.2014.14.2.43.

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46

Dibaj, Ali, Mir Mohammad Ettefagh, Reza Hassannejad, and Mir Biuok Ehghaghi. "Fine-tuned variational mode decomposition for fault diagnosis of rotary machinery." Structural Health Monitoring 19, no. 5 (November 13, 2019): 1453–70. http://dx.doi.org/10.1177/1475921719887496.

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Variational mode decomposition is a powerful signal processing technique that can adaptively decompose a multi-component signal into a number of modes, via solving an optimization problem. The optimal performance of this method in signal decomposition and avoiding of the mode mixing problem strictly relies on the true selection of decomposition parameters, that is, the number of extracted modes ( K) and the mode frequency bandwidth control parameter ( α). In the literature, the optimal values of these parameters are achieved by evaluating fault-related indices like kurtosis, but such an index is inefficient in judging the decomposition of healthy (without fault-related components), low-defective, and high-noise signals. In this research, a novel method called fine-tuned variational mode decomposition is proposed to determine the optimal values of decomposition parameters K and α, by judging the adaptive indices. In this proposed method, the optimal values of these parameters are obtained by minimizing the mean bandwidth of the extracted modes. In order to achieve these optimal values, the mean correlation coefficients between the adjacent modes and the energy loss coefficient between the original signal and the reconstructed signal, should not exceed of defined thresholds for optimal values. The proposed method is applied to the simulation signal and experimental ones collected from the automobile gearbox system. Comparing this method with those in the literature exhibits its higher effectiveness in the true decomposition of signals with different natures. It is also shown that using the proposed method for signal decomposition is able to correctly classify the healthy and defective states of the gearbox system alongside the principal component analysis method and support vector machine classifier.
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47

Chen, En Ping, Shao Hui Li, Feng He Wu, and Chong Min Jiang. "Structure Design of Biaxial Rotary Milling Head with High-Torque, High-Precision and Mechanical Spindle." Key Engineering Materials 621 (August 2014): 337–45. http://dx.doi.org/10.4028/www.scientific.net/kem.621.337.

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As a key component of heavy five-axis linkage CNC machine tools, the existing mechanical biaxial rotary milling heads are usually driven by worm gear, timing belt, or multi-stage gears. Worm gear is inefficiency to transmit motion, hard to maintain the accuracy and difficult to eliminate all clearance; Timing belt can be seriously worn and cannot maintain good accuracy; and multi-stage gears transmission has defects such as long chain, low transmission stiffness. This paper aims at designing a biaxial rotary milling head with large output torque of 3000Nm, high precision and high rigidity. So a new design for biaxial rotary milling head with mechanical spindle, gear transmission and swinging fork structure is proposed. An integral supporting axis is applied to increase the rigidity of A-axis; through the closed numerical loop control based on precise encoder and the decoupling technology of feed motion of A/C axis, the contradiction between large reduction ratio and high precision transmission is solved, and then the requirement of high positioning accuracy (10") is met. Theoretical calculation and simulated analysis shown, the new design not only can guarantee transmission accuracy and dynamic characteristics of biaxial rotary milling head, but also can improve its structural stiffness and meet the high demands of large torque, high precision and high rigidity.
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48

Li, Yi-Tsung, and Kuang-Chao Fan. "A novel method of angular positioning error analysis of rotary stages based on the Abbe principle." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 11 (January 30, 2017): 1885–92. http://dx.doi.org/10.1177/0954405416688936.

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Abbe error is the inherent systematic error in linear displacement measurement due to the measuring axis being out of line with the moving axis. The resulting gap is called the Abbe offset, which will multiply the angular pitch error of the moving stage to become the positioning error of the linear stage along the moving axis. Analogous to the Abbe principle, in the rotary stage, the rotary encoder is used to detect the worktable’s rotational angle. The encoder is normally mounted at a distance from the bearing. This distance can be also regarded as Abbe offset. Due to the inherent tilt and radial motions of the axis of rotation, the encoder’s rotating component, that is, the circular grating, would result in a lateral displacement relative to its sensing head that is fixed inside the stage housing. The actual measured angle is, therefore, different from the commanded angle, causing the angular positioning error of the rotary stage in machine tools and open-loop controlled system. In this article, the angular positioning error of the rotary stage caused by the tilt motion error and radial motion error of the spindle, the offset and the size of encoder is analyzed and experimentally verified.
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Hou, Xukui, Ende Wang, Hui Cao, Yalong Zhu, and Kai Qi. "Research on Dynamic Balance Adjustment Method of Single Braced Frame Gyroscope Rotor." MATEC Web of Conferences 256 (2019): 02005. http://dx.doi.org/10.1051/matecconf/201925602005.

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The uneven mass distribution of gyro rotors results in vibration, rotation and drift of gyro rotors, which seriously affect the performance index and life of gyro rotors. However, because there is no rigid connection between the rotary shaft and the shell of the gyro rotor, the dynamic balancing machine can only balance the vibration component of the single braced frame gyroscope rotor, and can’t measure the gyro rotor’s rotation component. By analyzing the influence of uneven rotor mass distribution on the gyro rotor performance, a method of eliminating two rotational degrees of freedom of the gimbal in gyro rotor by mandrel is proposed, which makes the dynamic balancing machine directly measure the vibration component and the moving component of the gyroscope rotor, and simplifies the dynamic balancing debugging process.
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50

Noritsugu, Toshiro, Mitsuhiko Kubota, and Sadaharu Yoshimatsu. "Development of Pneumatic Rotary Soft Actuator Made of Silicone Rubber." Journal of Robotics and Mechatronics 13, no. 1 (February 20, 2001): 17–22. http://dx.doi.org/10.20965/jrm.2001.p0017.

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A soft actuator with inherent flexibility has been required to built up a soft mechanical drive system such as a human beings collaboration robot and a welfare machine. In this study, a rotary type soft actuator made of silicone rubber driven with compressed air has been developed. This actuator can realize the desired rotary operation by using the fiber reinforcement and the partial difference of stiffness owing to the rubber thickness. In this paper, the structure and operational principle of the actuator is described, and the fundamental properties of actuator are experimentally investigated. The experimental results show that the actuator has the sufficiently large operational angle and the dynamic characteristics of a damping and elasticity component. Its application to a soft robot finger and a robot hand are discussed. Owing to the flexibility of actuator, this hand can grasp unshaped or flexible objects without any complicated control algorithm. The availability of this actuator is confirmed through some experiments.
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