SIMULATION ANALYSIS OF RV REDUCER BOLT FORCE by DONG Wei, HAN Ju, WANG XiaoHu, ZHANG FuShuai

“…Combining vector method to establish the profile equation of cycloidal wheel after shaping. Apply the principle of deformation coordination. …”
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Gear Rattle Elimination Control of a Power-split Hybrid Electric Car by Wang Chen, Yu Jianbin, Zhou Wentai

“…Firstly,the two driven wheel gear tapping torque area corresponding to the certain state of engine is obtained by calibration,controlling the two motors to avoid driven wheel running in the area through the kinematics relationship of system on the basis of does not affect the driving intention and fuel consumption. …”
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Analysis on Transient Contact Performance of Meshing Transmission of Cycloid Pin Gear in Robot Precision Reducer by Xuetao Qiao, Ke Jia, Chunshan Chen, Changlu Wang, Leyu Wei, Liyong Zhang, Weigong Wang

“…Therefore， 3D parametric modeling and transient dynamics analysis are carried out on the meshing transmission part of cycloid pin gear in the second stage of the precision reducer through the digital design and dynamics analysis platform combined with Creo and ANSYS Workbench， the model of precise reducer parameter and the stress and strain nephogram of cycloid pin gear tooth surface during dynamic meshing of cycloid needle wheel can be obtained quickly and accurately， thus the contact stress distribution law of cycloid and pin wheel in meshing process is obtained. …”
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Principle Analysis and Dynamic Simulation of Self-stabilizing Speed Transmission for Wind Turbine by Su Rui, Li Gangjun, Rui Xiaoming

“…The time-varying speed of wind rotor and constant speed of motor are superimposed by the left wheel and right wheel of differential mechanism. …”
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Proposition d’un outil d’aide au diagnostic du syndrome du canal carpien pour les acteurs de la santé au travail by Florence Bazzaro, Jean-Claude Sagot

“…In order to fill this gap, we developed a device for rapid CTS diagnosis which is composed of two complementary quantitative tests: the wheel test, which consists in detecting notches on a rotating wheel, and the beam test, which consists in detecting various forces exerted on a finger. …”
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Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train by Mengxi Zhang, Xiaoqing Zhang, Lei Li, Chengyu Hong

“…The influences of the axle load, the wheel speed, and the cover depth of the shield tunnel on the vertical displacement and acceleration of the lining were presented and discussed. …”
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Multi-objective Reliability Optimization of NGW Type Reducer of the Road-rail Vehicle by Wen Junhu, Zheng Wei, Hao Shuai

“…Aiming at the problem of multi-objective reliability optimization for the reducer of road-rail vehicle,firstly,it must be ensured that the electric wheel planetary gear reducer is in good working order and loading conditions meet the requirements of transmission.By applying the reliability theory and optimization design technology,the reducer weight reduction,materials saving,low cost can be realized safety and reliability is improved.The MATLAB optimization toolbox is used to solve the problem of the optimization of reducer.Taking the volume and contact ratio as multi-objective optimization function,then the multi-objective optimization problem is transformed into single-objective problem to solve by the linear weighted method.The mathematical model is established by using the safety factor method and other constraints.By using Fmincon function,the optimizing calculation and analysis are carried out,the optimal solution is got,which makes the optimization design parameters more reasonable than the original design parameters.Consequently,the results show that the working performance of the electric wheel of the road-rail vehicle is improved.…”
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Application of Thick Concrete Rolling Technology in Gaobei Water Conservancy Project of Han River by SHI Aijun, WANG Yongjian, DING Shihui, LI Ke, XIE Xiangming, ZENG Licheng, YAO Chukang

“…In order to increase the thickness of roller compacted concrete (RCC) from the conventional 30 cm to 50~60 cm,and improve the construction efficiency of RCC dams,this paper conducts the 50~60 cm concrete rolling compaction test by the first domestic double-steel-wheel vertical vibratory roller and compaction detector,determines the best construction parameters through this test and applies them in the Gaobei Water Conservancy Project of Han River.The test results show that,by reasonable selection of the rolling parameters,the domestic double-steel-wheel vertical vibratory roller is capable of compacting concrete with a thickness of 60 cm and below.While the domestic compaction detector can detect the compactness of concrete with a thickness of 60 cm and below.Thick concrete rolling technology,which can increase construction speed of dams and reduce the number of interlayer bonding surfaces of the dam,show a good popularization and application in construction of RCC dams.…”
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Analysis of Oil-Gas Two-Phase Flow and Parameter Influence of Star Herringbone Gearboxes Based on the SPH Method by Wang Lin, Du Zekai, Zheng Zhizhen, Wang Yong

“…The results show that the oil flow field distribution is obviously different at different cross-section positions in the gear shaft direction, the oil flow in the middle cross-section position of the gearbox is the largest, and the local eddy current phenomenon occurs in the area between the solar wheel, planetary wheel and oil injection port. The gear speed and oil injection speed have great influence on the oil distribution in the gearbox.…”
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Effect of Gear Eccentricity on Dynamic Behavior of Locomotive Rolling Stock Transmission System by Li Fuzhong, Du Hongmei, Li Fenglin, Fan Yiwei, Zhang Liang, Wang Zhiwei

“…The gear transmission sub-system and the locomotive system are coupled through the gear meshing, suspension system and wheel-rail interactions. The nonlinear factors such as gear backlash, time-varying meshing stiffness, track geometric irregularity and wheel-rail contact are considered in detail. …”
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FAULT ANALYSIS AND PROCESSING OF GAS BEARING TURBO- EXPANDER by ZHU YongRen

“…Clearance,between the machine shell and wheel,could be adjusted to avoid the increase of the internal leakage. …”
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VIRTUAL MANUFACTURING AND SIMULATION ANALYSIS OF SPIRAL BEVEL GEAR BASED ON CURVATURE ADJUSTMENT by WANG XueJun, WANG ZhongHou, LI Yan, DIAO XinWei, LIU XiaoFeng

“…In view of the blindness and contingency of the trial cutting method in traditional processing of spiral bevel gears, this paper proposes a processing adjustment method of designing grinding wheel section according to the curvature of the tooth surface. …”
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TOPOLOGY OPTIMIZATION DESIGN OF HIGH SPEED EMU GEARBOX by GAO Yang, QUE HongBo, BIAN Xiang, WEI YuZhou

“…But it’s natural frequency is close to the main vibration frequency of wheel shaft system, which may cause resonance that leading to noise and box cracks. …”
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Tooth Profile Modification Method of RV Reducer Cycloid Gear Aiming at Optimizing Carrying Capacity by Zongwen An, Panlong Jia, Qiang Wang, Zhili Li, Mingyuan Lei

“…Based on the RV-60E reducer as an optimization example，the mechanical analysis of the cycloid needle wheel transmission part is carried out first，and the mathematical model of the cycloid wheel shape is established with the goal of reducing the maximum bearing capacity of the needle teeth. …”
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Effect of centrifugal load on crack path in thin-rimmed and webbed gears by F. Curà, A. Mura, C. Rosso

“…Crack propagation direction is basically influenced by the wheel geometry parameters, above all the rim thickness. …”
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GENERAL MODEL AND STABILITY STUDY OF CYLINDIRCAL GRINDING CHATTER (MT) by CHI YuLun, LIU Bin, SHEN YiFeng

“…The overlapping factor related to the width of the grinding wheel was introduced into the general dynamic model to fully consider the regenerative chatter relationship between the workpiece and the grinding wheel, and it can be used in longitudinal grinding and circular cutting grinding. …”
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Contact Simulation and Dynamic Performance Test of Ease-off Modified High Reduction Hypoid Gears by Gu Dewan, Wei Bingyang, Ren Minghui, He Hongtu

“…Aiming at the problems of insufficient curvature of the tooth profile of the wheel of the high reduction hypoid (HRH) gear, and high twist of the tooth surface of the pinion with a large helix angle, a method of using a tool to modify the wheel to realize the point contact of the tooth surface is proposed; the pinion adopts the general hobbing method, which simplifies the machining parameters of the machine tool. …”
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DESIGN AND STUDY A NEW TELESCOPIC ARM USED IN NARROW SPACE by LIU XiangYong, LI WanLi, WANG WenJia

“…As it is difficult to check water pumps and fuel boiler pipes,design and study a telescopic boom used in narrow space.Adopt steel tape to design telescopic arm,and the tapes’ edges are welded to form mechanical arm.Motor drive the divided wheel by gears,divided wheel drive steel tape to stretch,and telescopic boom has curly storage function.The arm’s section parameters include thickness,central angle,arc length;By the thin shell theory,analyze and calculate the central angle.Based on the Workbench software,analyze the central angle and thickness’ s infiuences to X and Y direction deformation.Results show that with the increase of central angle,the Y direction deformation decreases gradually,and the X direction deformation increases gradually.Deformation rate changes quickly before 40 °,and changes slowly after 40 °.With the increasement of thickness,the X and Y direction’s deformation rate are smaller.Based on theory and simulation,the final thickness is 0.1 mm and the central angle is 45 °.Finaly through experiments,verify the arm’s section parameters and bearing capacity.…”
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Geometrical Error Modeling of Large Modulus Modified Wind Power Gear based on Form Grinding by Jiong Wang, Shihang Yu, Yuwen Sun

“…Then，based on the tooth surface parameter，the length of common perpendicular between axes of the gear and the wheel，the contacting curve between the gear and the wheel is solved. …”
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Lightweight and Reliability Analysis of the Heavy Duty Driven Axle Housing based on the Finite Element Theory by Tuo Qianjin

“…Aiming at the problems of the process of driving heavy duty truck fuel consumption,higher manufacturing costs and so on,according to the finite element theory,the heavy duty truck driven axle housing lightweight design is carried out,and the light weight calculation results are imported into the finite element model to study the deformation of the axle housing before and after optimization at maximum load optimization uneven roads conditions of stress,life and safety coefficient changes.The results show that after the axle housing thickness lightweight size optimization,wheel area,leaf springs to the axle core area and axle core,the trend of the overall thickness of the axle housing is downward,there is no change to the wheel area to leaf spring transition area thickness.After the axle housing thickness lightweight size optimization,the trend of the total volume is a downward,the volume of the initial value is from 0.043m3 dropped to 0.0343m3,after lightweight size optimization,the axle housing stress and deformation,life and safety factors are little difference with before optimization,it is indicating that meet the requirements of lightweight of axle housing.…”
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