最新刊期
      期 4 ， 2016
      • Lu Qi,Wu Xinhui,He Weidong
        Vol. 40, Issue 4, Pages: 1-3(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.001
        摘要：A kind of centring device and a comprehensive performance test system of the RV reducer used in the robot are provided,the test system including light transmission accuracy test module,load transmission accuracy test module,stiffness,backlash test module,precision life test module and transmission efficiency test module,the transmission accuracy,stiffness,backlash,precision life and the transmission efficiency of the RV reducer used in the robot with different series and different specifications could be highly accurately measured.The inspection standard for the design and manufacturing of the RV reducer used in the robot is provided,the higher percent of pass of the products before use is guaranteed,the inspection standard to improve the performance parameters of the RV reducer used in the robot is also provided.  
        关键词：RV reducer;Centring device;Test system   
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        发布时间：2022-10-20
      • Zou Xihong,Yang Zhenliang,Yuan Dongmei,Peng Jigang,Zhou Yujun
        Vol. 40, Issue 4, Pages: 4-9(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.002
        摘要：The indoor simulation bench test of transmission is an important method of assessment,evaluation and promotion of its performance.Taking transmission as an example,a program load spectrum compiling method for transmission accelerated fatigue test is presented.The actual road load spectrum of automobile transmission is collected on Automobile Proving Ground in Dianjiang used wireless telemetry technology.The actual load spectrum is pretreated divided gear position,the second gear load spectrum is selected as an example.The frequency distribution matrix of load is obtained based on rainflow counting method,the distributions of mean and range are found to confirm with normal distribution and two- parameter Weibull distribution respectively.The mean of the normal distribution is 91.77 N·m,and the standard deviation is 163.27 N·m,the shape parameter of Weibull distribution is 1.346,and the scale parameter is 305.489,the distributions of load range and mean is independent.The two- dimensional load spectrum with 8×8 levels is established with joint probability distribution function.After two- dimensional load spectra is transformed into one- dimensional 8-level load spectra with variable mean method.Based on damage and low loading strengthening property of half shaft,the equivalent strengthening rule between strengthening loads is explored.By transferring the strengthening loads to the most effective level,the load loading frequency reduced,test efficiency is improved.  
        关键词：Transmission;Load spectrum;Low loading strengthening;Accelerated test   
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        发布时间：2022-10-20
      • Shi Wankai,Wang Xu,Han Zhenhua,Liu Yin
        Vol. 40, Issue 4, Pages: 10-14(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.003
        摘要：In order to further study the microscopic wear mechanisms of micro gear,by using the classical Archard wear equation,combining with JKR（Johnson K L,Kendall K,Roberts A D） theory and GW（Greenwood and Williamson） rough surface model,a simulation model of the wear in micro gear is firstly established and the measures to reduce tooth wear are proposed.The simulation with considering the influence of single factor and multiple factor of surface attractive forces,surface roughness,the radius of curvature in asperity apex,material property etc.on tooth surface wear is carried out.The results show that an appropriate increasing in the surface roughness,reducing the radius of curvature in asperity apex,selecting the gear with larger parameter product value ηβσ which describing the rough surface,choosing the material which has a larger elastic modulus can alleviate wear and extend wear life.  
        关键词：Micro gear;Wear;Simulation;Surface attractive force   
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        发布时间：2022-10-20
      • Wang Yanzhong,Chen Yanyan,Zhou Guangming,Jia Shuang,Lv Qingjun,Zhang Zuzhi
        Vol. 40, Issue 4, Pages: 15-19(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.004
        摘要：Aiming at the problem of load test data volume of transmission system of heavy tracked vehicles（HTVs） is huge and extraction rate of effective information is low,the inherent fractal hierarchical rule of this data is studied,this data have the typical fractal characteristic is verified and the fractal parameter of the tracked vehicle transmission system load data under a certain road condition.Under the premise of ensurse data accuracy and fractal character,a new fractal interpolation method（FIM） is built,the continuation to simplify data information is realized.Moreover,obvious advantages could be observed in the results of the FIM,comparing to those of the linear interpolation method and the spline interpolation method.It could be concluded that by combining a’low-frequency-and-long- time’ sampling approach and the proposed FIM,the test efficiency of load history can be improved,the complex chaotic feature of high frequency sampling data can be represented.And a analysis way for researching the dynamic chaos characteristic of the HTVs transmission system is provided.  
        关键词：Load history;Variation method;Fractal characteristic;Fractal interpolation   
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        发布时间：2022-10-20
      • Li Feng,Lin Luping,Qi Xiaoli,Wang Min,Pan Ziwei,Zhang Xingquan,Tong Jinyu,Feng Jianyou
        Vol. 40, Issue 4, Pages: 20-23(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.005
        摘要：The full tooth dynamic finite element model of the GIICL9 crown gear coupling is established based on the ANSYS/LS-DYNA.The research results demonstrate that,the impact phenomenon need to be controlled in the start-up process,and the contact stress distribution along the high direction of the tooth is not uniform.In addition,the average contact stress value of each tooth is also different.The smaller of the tool displacement circle radius,the more discrete the contact stress of each tooth.The maximum mises stress of tooth root and contact stress tooth surfaces will not be affected by the rotational speed as the running process is stable.  
        关键词：Crown gear;Contact stress;Dynamic simulation;Tool displacement circle radius;Rotational speed   
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        发布时间：2022-10-20
      • Chen Zhiliang,Yang Rongsong,Liu Qiang
        Vol. 40, Issue 4, Pages: 24-27(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.006
        摘要：According to the mathematical model of milling tooth processing of spiral bevel gear,the tooth surface parameters of spiral bevel gear are obtained.The precise three- dimensional model is established.By using the ANSYS workbench software,the change rule of contact stress of spiral bevel gear with different load under multi tooth meshing state is analyzed.The more accurate contact stress of spiral bevel gear is obtained.The theoretical basis for gear fatigue life calculation is provided.  
        关键词：Spiral bevel gear;Mathematical modeling;Three-dimensional model;Contact stress;Finite element analysis   
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        发布时间：2022-10-20
      • Ran Xiaoyan,Zhang Bai
        Vol. 40, Issue 4, Pages: 28-32(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.007
        摘要：The coordinate measure machine（CMM） with rotary table is often use in the field of precision measurement.Because of the error evaluation requires that all measured point must be expressed in the same coordinate system,but the workpiece coordinate system is changed in the process of measuring because of rotation of rotary table,so it is difficult to evaluate errors.Therefore,a model for coordinate transfer from four-dimensional coordinate system to three- dimensional coordinate system is created.Through the transfer algorithm of coordinate system,the four- dimensional coordinate with rotary table can be transferred to a three dimension Cartesian coordinate by utilizing rotary table coordinate system to act as medial coordinate system,then,it can be transferred to workpiece coordinate system or machine coordinate system,sequentially,the error evaluation is realized.The experimental results show that the mathematical model is right,and it can meet the requirement of precise measurement.  
        关键词：Coordinate transfer;Rotation table;Four-dimensional coordinate;Three-dimensional coordinate   
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        发布时间：2022-10-20
      • Qin Bo,Liu Yongliang,Wang Jianguo,Qin Yan,Yang Yunzhong
        Vol. 40, Issue 4, Pages: 33-37(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.008
        摘要：In order to solve the problems that gear fault classification model has weak generalization ability,poor accuracy causing by the fault features of gear is difficult to extract and extreme learning machine input weights and threshold of hidden layer nodes randomly selected,a BA- ELM gear fault diagnosis method is puts forward based on energy feature of wavelet packet optimal nodes.First,the gear vibration signals are decomposed by using wavelet packet in this method,the optimal nodes is selected by using the correlation coefficient between each node decomposition signals and original signal,and the energy feature is calculated.Second,the bat algorithm is used to optimize the extreme learning machine input weights and threshold of hidden layer node and the gear fault classification model of BA-ELM is established.Finally,the energy entropy feature vectors of the optimal wavelet packet nodes as the model input is used to identify the different fault states of gear.The experimental results show that,comparing with SVM and ELM fault classification method,the BA-ELM gear fault diagnosis method based on energy feature of wavelet packet optimal nodes has higher classification accuracy and better generalization ability.  
        关键词：Wavelet packet;Energy entropy;Bat algorithm;SVM;Gear;Fault diagnosis   
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        发布时间：2022-10-20
      • Zhang Yanjie,Wu Xuncheng,Zhang Juecheng
        Vol. 40, Issue 4, Pages: 38-42(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.009
        摘要：For study the impact of the tooth profile total deviation on the dynamics characteristic of helical gear,based on theoretical involute and tooth profile total deviation value,the mathematical model of error involute with tooth profile deviation is established.By taking a involute helical gear pair as the research object,the 3D model of helical gear pair with tooth profile deviation is established by using UG,and the reliability of the ideal model is verified by using ADAMS.Meanwhile,combining the ANSYS,the angular velocity,angular acceleration of driven gear of the error model and ideal model are compared and analyzed.The results show that the conclusion in dynamics simulation based on ADAMS is the nearly same as transient kinetic analysis based on ANSYS.The tooth profile deviation has significant effect on the angular velocity and angular acceleration of driven gear.  
        关键词：Gear;Tooth profile deviation;Error involute;Dynamics simulation;Finite element analysis   
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        发布时间：2022-10-20
      • Qian Canrong
        Vol. 40, Issue 4, Pages: 43-47(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.010
        摘要：In order to further improve and mend the engagement characteristics of heavy duty wet clutch during the using process,the model of the engagement characteristics of heavy duty wet clutch is established by combining the fractal geometry theory.Finally,the micro convex body of the contact area,fractal dimension and contour amplitude scaling factor of the friction pair in the wet clutch contact region engagement friction force influence law and the change law of wet clutch friction temperature rise are obtained through theory and test bench method.The research results show that without considering the effect of the micro convex body,with the increase of the fractal dimension and the actual contact area,the wet clutch friction force will increase; with considering the effect of the micro convex body,with the increase of the fractal dimension and the actual contact area,the wet clutch friction force will decrease; with the decrease of the contour amplitude scaling factor,the friction force and the maximum temperature rise can be increase; the results show that the theoretical calculation between the fractal theory results and the experimental results are basically the same.  
        关键词：Wet clutch;Fractal theory;Engagement characteristic;Heavy duty   
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        发布时间：2022-10-20
      • Sun Zhenyu,Feng Jin,Du Jinfu
        Vol. 40, Issue 4, Pages: 48-51(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.011
        摘要：The deformation compatibility equations and the torque balance equations of a star gearing with three branches are estabished based on the characteristic that the system composes a closed-loop of power flow.In consideration of the parts manufacturing errors,assembly errors,bearing stiffness and float,the power splitting coefficient of each star gear and the system are calculated by using the theory of equivalent mesh error.The relation between the errors,float and the bearing stiffness and power splitting are analyzed from the perspective of statics,and comparing with planetary transmission.A new algorithm is proposed,the reference for the engineering application is provided.  
          
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        发布时间：2022-10-20
      • Cui Lingli,Zhai Hao,Zhang Feibin
        Vol. 40, Issue 4, Pages: 52-57(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.012
        摘要：For the purpose of investigating the effect of crack affecting lines on the gear tooth vibration response,the energy method is used for meshing stiffness calculation,and the effect of two crack affecting lines on meshing stiffness are compared with each other.The accuracy of solving meshing stiffness under crack curve affecting line is proved by the finite element method.Then a dynamics model of gear tooth is built to compare the different responses of gear system under the two crack affecting lines.The result shows that an intersection will appear in the fault detection indicators under two crack affecting lines when the crack size grows up to the special value and the intersection which is different from previous paper is proved to be right.  
        关键词：Energy method;Crack affecting lines;Fault detection indicator;Intersection   
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        发布时间：2022-10-20
      • Li Yamei,Dong Huimin,Zhang Rubian,Hao Lige,Qiu Jun,Wang Delun
        Vol. 40, Issue 4, Pages: 58-62(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.013
        摘要：When the interference fit connection structure being applied load,its contact surface can produce small relative slip amplitude.When the relative slip amplitude is in a certain range,the fretting fatigue life would be shortened.In order to evaluate the rationality of the joint of planet carrier interference fit connection structure,the condition of interference fit fretting slip is analyzed by using Workbench.Since Workbench cannot directly get the fretting slip amplitude of certain direction or loading step,therefore a method for extracting slip vector magnitude is proposed to analyze the slip amplitude of a certain direction or loading step.The results show that,in the loading stage,the fretting slip of back-end interference contact area is in critical value range,the fretting fatigue life is shorter.The analysis results provide a reference for structural design improvement.  
        关键词：Planet carrier;Interference fit connection;Fretting slip;Finite element analysis   
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        发布时间：2022-10-20
      • Xiao Zhenqian,Wang Wenge,Pan Yukang,Rao Xinghua
        Vol. 40, Issue 4, Pages: 63-67(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.014
        摘要：The large load torque fluctuation of disc cam mechanism with oscillating roller followers mainly affects the steady performance of servo motor in high-speed precision machinery.According to the load characteristic,a optimization method for reducing the mechanism overall load torque fluctuation is proposed by optimizing the resistance torque in the process of active parts and follower.This method is based on the cam curve motion law modulation method and particle swarm optimization algorithm,through generating new cam profile to complete the optimization process.The optimization of device is completed by applying this method on transfer mechanism in high speed packaging machinery.The simulation result shows that,the load fluctuation of device can be effectively reduceds.  
        关键词：Disc cam mechanism with oscillating roller follower;Cam curve motion law modulation;Particle swarm optimization algorithm;Load characteristic optimization   
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        发布时间：2022-10-20
      • Yin Guangcai,Zi Bin,Chen Qiao,Li Yuan
        Vol. 40, Issue 4, Pages: 68-73(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.015
        摘要：A cable-pneumatic-muscle hybrid-driven waist rehabilitation robot is designed for human waist and gait rehabilitation training.The presented data and curves indicate that the state of motion of human torso during normal walking and the rehabilitation robotics fundamental functions are confirmed.According to these,the structure of the rehabilitation robot that employed the double parallel mechanism is designed.The cable- driven parallel mechanism is chosen to drive the human lower limb,and the pneumatic muscle（PM） is chosen to twist the human waist.The adaptability and safety of the rehabilitation robot is enhanced by synthesized the features of the two actuators.The inverse kinematics are solved by using the closed-vector-circle method,and the velocity Jacobian matrix is established.In addition,the rehabilitation robotics kinematics model and the PM element thermodynamics model are established in view of the parameters of different trainers is diverse.Then the kinematics character of cables and PM during the normal walking are obtained through numerical simulation,and the force variation trend of PM elements is also simulated to verify the feasibility of mechanism.  
        关键词：Rehabilitation robot;Gait training;Cable-pneumatic-muscle hybrid drive;Kinematics analysis   
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        发布时间：2022-10-20
      • Zhou Qiuyu,Xing Xiaodong
        Vol. 40, Issue 4, Pages: 74-80(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.016
        摘要：An omni-directional mobile stair climbing wheelchair is designed to help the persons with lower limb disabilities climb the stairs.The function of climbing stair of the wheelchair is realized by using mechanical support legs and wheels bearing the wheelchair alternately.Four Mecanum wheels are taken as the wheelchair wheels and driven by four electrical motors.The capability of obstacle crossing with the limited width of stairs and the kinematical and dynamics math model are analyzed.The anteroposterior and lateral stability of the wheelchair are analyzed with combining energy method and stability reserve analysis method.The characteristics of omni-directional movement of the wheelchair are also studied.The result shows that the wheelchair can climb most stairs safely and wouldn’t turn over.The omni- directional movement can be achieved by controlling the speed of four wheels.The structural design of the wheelchair is reasonable.And the combination of the stair- climbing function and the omni- directional mobile function is realized successfully.  
        关键词：Omni-directional mobile;Stair climbing wheelchair;Obstacle crossing capability;Stability   
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        发布时间：2022-10-20
      • Song Lijuan,Ji Weixi,Xie Jian,Wang Yu
        Vol. 40, Issue 4, Pages: 81-86(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.017
        摘要：Based on the meshing theory of ZC1 worm gear pair,the tooth surface contact parameters are analyzed by using MATLAB.The results show that the axial module,center distance,lead angle,radius of arc tooth profile of grinding wheel have great influence on tooth surface contact parameters.In general,the center distance is selected in the beginning of design,so the axial module,lead angle,radius of arc tooth profile of grinding wheel are selected as design variable.For improving the meshing performance of worm gear pair,taking the induced normal curvature and lubrication angle as objective function,and combining with the constraints of top thickness of worm,top thickness of worm wheel and undercutting,the optimum mathematical model is established.The improved particle swarm algorithm is adopted as optimization algorithm and the results show that the optimized lubrication angle is larger and induced normal curvature is smaller.The meshing performance of worm gear pair is improved effectively.  
        关键词：ZC1 worm gear pair;Tooth surface contact parameter;Optimization design;Meshing performance   
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        发布时间：2022-10-20
      • Tan Weiming
        Vol. 40, Issue 4, Pages: 87-90(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.018
        摘要：An inner-linked transmission train based on hybrid- driving is proposed for the gear generating transmission train of the hobbing machine to solve the two main problems of gear generation and helix differential in designing transmission system of the hobbing machine.By using a 2 DOF differential gear mechanism as the motion composition mechanism,a mechanical transmission movement and an electronic- driven movement are combined to achieve combination of rough adjustment and fine adjustment.Based on the method of hybrid- driving,the transmission system of the hobbing machine is designed in details,with its hobbed gear tooth numbers being 11110.According to the design result,the requests for generating motion in gear hobbing machine could be satisfied.  
        关键词：Hobbing machine;Transmission system;Inner-linked transmission train;Hybrid-driving   
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        发布时间：2022-10-20
      • Xu Long
        Vol. 40, Issue 4, Pages: 91-93(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.019
        摘要：On the basis of the theoretical research of conjugate tooth profile design,based on the SolidWorks software,the known transmission ratio and tooth profile is divided into a straight line,arc,spline to solve the conjugate tooth profile,and the motion simulation is carried out,finally,the correctness of the design is verified.The results has a certain reference value for design and machining of tooth profile,the design method is simple and accurate,the tedious computation is eliminated,it has a certain engineering application prospect.  
        关键词：Linear conjugate tooth profile;Arc conjugate tooth profile;Spline conjugate tooth profile;Tooth profile design;Envelope simulation   
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        发布时间：2022-10-20
      • Li Yawei,Huang Jinying
        Vol. 40, Issue 4, Pages: 94-96(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.020
        摘要：A study on the issue that the forward kinematics and workspace of a manipulator with 8--DOF is carried out.Firstly,according to the structural characteristics of the manipulator,the link coordinate system of manipulator are established by using D-H method,and its forward kinematics is obtained.Secondly,the simulation model of manipulator is set up by using the MATLAB Robotics Toolbox,and the correctness of the kinematics forward solution is testified.Finally,according to the position vector of the end actuator,the Monte Carlo method is applied to analyze the manipulator workspace,and the workspace range of the manipulator end actuator is acquired,and it is consistent with the design parameters of the manipulator.  
        关键词：Manipulator;Forward kinematics;Workspace   
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      • Pan Yu,He Yunfeng,Xie Weijia,He Zhibing,Li Changyou,Huang Yuandu
        Vol. 40, Issue 4, Pages: 97-100(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.021
        摘要：Aiming at the problem of speed fluctuation caused by the hard dot arrangement of the automobile double cross shaft universal joint steering system,the layout of hard spot how to ensure universal constant velocity transmission is studied,and taking the double cross shaft universal joint transmission structural optimization of a car as example,by using ADAMS / view software,the parametric dynamics model of double cross shaft universal joint transmission mechanism is built.Taking the variable in structure as design variable,taking the interaxial angle between intermediate shaft and the input shaft,the output shaft is not less than 155° as constraint condition,taking the angular difference of interaxial angle between intermediate shaft and the driving,driven shaft as the optimization target,and setting the steering intermediate shaft phase angle,the best hard spot layout program of double cross shaft universal joint steering system is acquired,and the steering transmission without fluctuation.  
        关键词：Steering system;Double cross universal joint;Volatility;ADAMS/view;Optimal design   
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      • Zhang Xiaodong,Hu Ning,Bian Xianzhang
        Vol. 40, Issue 4, Pages: 101-105(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.022
        摘要：The lock-up clutch pressure observer is designed based on input-to-state stability（ ISS）.Considering the modeling error and additional disturbance,the ISS theory is introduced to theory to adjust the estimator parameter and ensure the system stability,and taking the uncertainty of model as disturbance inputs and the estimator is designed to ensure the error system is input- to- state stable.Based on the AMESim,the transmission model of automatic transmission is established.The designed observer is realized in the MATLAB/Simulink,and the joint simulation with the transmission model is carried out to verify the correctness of designed lock- up pressure observer of lock- up clutch.Comparing with the sliding mode observer,the designed pressure observer has the better performance.  
          
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      • Wang Chunyan,Ji Bin,Fu Jianwei
        Vol. 40, Issue 4, Pages: 106-109(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.023
        摘要：Taking the double arc gear in the national standard GB/T12759-1991 as the analysis object,by using the theory of fuzzy mathematics and reliability optimization design method,considering arc gear transmission allowable stress randomness and fuzziness,taking the fuzzy reliability of arc gear bending modulus strength and contact strength and the modulus,tooth number,helix angle,longitudinal coincidence degree of gear as constraint condition,a minimum volume of arc gear optimization as target,the fuzzy reliability optimum design model of double arc gear is established,and a practical example is given,the results indicate that,the circular gear design with fuzzy reliability optimization design method has better rationality.  
        关键词：Matlab;Double circular arc gear transmission;Fuzzy reliability;Optimal design   
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      • He Guoqi,Deng Shujie,He Ying,Yan Hongzhi,Sun Neng,Wang Qilei
        Vol. 40, Issue 4, Pages: 110-116(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.024
        摘要：The three dimensional solid model of the face gear with different pit morphology and the simulation model of the face gear transmission system of the pit morphology are established,through the contact collision algorithm of multi- body dynamics,the change regularity of meshing force and output speed of the different pit morphology face gear transmission under certain condition is analyzed.The results show that the influence of the circular pit morphology on the transmission system meshing force is the smallest,the value of transmission error is the lowest,so the transmission stability is optimal.And the experimental conclusion is consistent with the simulation results,the correctness of the simulation is verified.A reasonable basis of oil- lack lubrication model of face gear with pit morphology in the future is provided by the results.  
        关键词：Pit morphology;Dynamics simulation;Meshing force;Output speed   
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      • Qing Xin,Hou Li,Ma Dengqiu,Wang Hong
        Vol. 40, Issue 4, Pages: 117-121(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.025
        摘要：Based the UG,the three- dimensional models of different tooth width of cylindrical gears with arcuate tooth trace are established.The change rule of rotational speed and meshing forces are obtained through comparing and analyzing the kinematics and dynamics of different tooth width by help of ADAMS.By the kinematics analysis,the running steadiness of cylindrical gear with arcuate tooth trace is verified.When 1.3r0<b<1.9r0,the error of rotation speed is the smallest.By dynamics analysis,when 1.2r0<b<1.8r0,the gear pair has the best transmission stability,load capacity and the best performance.Therefore,the theoretical basis for the design of cylindrical gears with arcuate tooth trace under the high speed and heavy load condition is provided by this analysis method and has engineering applications value.  
        关键词：Cylindrical gear with arcuate tooth trace;Three-dimensional modeling;Kinematics analysis;Dynamic analysis   
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        发布时间：2022-10-20
      • Cui Xiuyan,Chen Yangzhi
        Vol. 40, Issue 4, Pages: 122-124(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.026
        摘要：A modal analysis on vibration of a small wind turbine with single stage line gearbox is studied.A three- dimensional solid model of line gear（LG） transmission system is constructed based on Pro/E software.And by using the modal analysis function of ANSYS,the solid model is imported to ANSYS workspace to establish the finite element model of line gear,and the model of a small wind turbine LG transmission system is analyzed,the natural frequency and the corresponding modes of vibration of the LG assembly are obtained.It provides a reference data for optimization design of a small wind turbine LG transmission system to avoid LG natural frequency of inputting the external excitation and eliminate the resonance,which improve the operation reliability of a small wind turbine.  
        关键词：Line gear（LG）;Small wind turbine;ANSYS;Modal analysis   
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      • Jing Shuangxi,Yang Xin,Leng Junfa,Wang Zhiyang
        Vol. 40, Issue 4, Pages: 125-128(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.027
        摘要：According to the modulation characteristic of fault signals of rolling bearings and the disadvantages of depending on the experience to select resonance high frequency band,an improved empirical mode decomposition（EMD） and spectrum kurtosis method of rolling bearing fault diagnosis is put forward.First of all,the bearing fault signal are decomposed into a number of intrinsic mode functions（IMF） through the EMD method.Then,the false IMF components is eliminated through mutual information,kurtosis and cross- correlation,the fault signal is reconstructed.Finally,the optimal band pass filter is designed by using the spectral kurtosis,then analysis of envelope demodulation spectrum of the filtered signal is carried out,the fault feature of rolling bearing is extracted.The analysis results of rolling bearing experimental signal show that,the improved EMD and spectral kurtosis method can effectively extract the fault features of rolling bearing,and has more advantages than the traditional envelope analysis method.  
        关键词：Empirical mode decomposition;Spectrum kurtosis;Rolling bearing;Fault diagnosis   
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        发布时间：2022-10-20
      • Lin Jinshan
        Vol. 40, Issue 4, Pages: 129-132(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.028
        摘要：Gearboxes are complex dynamics system,and the dynamics evolving process of a gearbox is hard to describe.The scaling crossover property of increment series of vibration data of gearbox is analyzed,and on this basis,an intrinsic relation between coordinates of starting and ending points of a scaling range is deduced by trigonometric function.As a result,a novel method for condition monitoring of gearboxes is developed.Moreover,the method is applied to condition monitoring of a realistic gearbox,and comparing with the conventional time domain statistical parameter method,and the effectiveness and superiority of the developed method is proved by the result.  
        关键词：Scaling analysis;Increment time series;Gearbox;Condition monitoring   
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        发布时间：2022-10-20
      • Fang Jun,Tao Hongyan,Yu Chengbo
        Vol. 40, Issue 4, Pages: 133-138(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.029
        摘要：The disc type eddy current permanent magnetic governor is a new type of device for speed control,it is installed between motor and load.The torque and speed can be adjusted by magnetic flux density which relates to the gap size between the magnetic steel rotor and conductor rotor.The governor electromagnetic field is analyzed and the torque expression is established.Through the analysis,the influence factor of structure size,material property of key parts,rotation speed difference three aspects affects on the transmission characteristic are got.Then,by using the Maxwell 3D of Ansoft software,the simulation model is built and the simulation of 3D static,transient is carried out by changing influence factors separately,the air gap magnetic flux density distribution diagram and curve of each influence factor on the torque and magnetic energy utilization are obtained.By analyzing the variation reason,the conclusion is got and some references for structure size optimization and material selection of this sort of permanent magnet governor is provided.  
        关键词：Permanent magnetic governor;Torque characteristic;Magnetic energy utilization;Finite element analysis   
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        发布时间：2022-10-20
      • Lu Liming,Zeng Guowen
        Vol. 40, Issue 4, Pages: 139-142(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.030
        摘要：Taking the slide block of rolling-sliding compound bearing as a research object,a local heat transfer model is set up for rolling-sliding compound bearing between slide block and inner and outer raceway and cylinder.The contact surface temperature distribution between slide block and inner,outer raceway is analyzed by using the structure thermal- stress coupling effect of the finite element software ABAQUS.The temperature distribution characteristic of the rolling-sliding compound bearing under different revolving speed and radial load conditions are obtained.The results show that,the contact surface temperature between slide block and inner,outer raceway rising with the increasing of load and rotating speed.There is large difference in the temperature of various nodes on the contact surface of slide block with inner and outer raceway,the feasibility of the finite element analysis of temperature for the slide block of rolling- sliding compound bearing is verified.  
        关键词：Rolling-sliding compound bearing;Slide block;Thermal field;FEM   
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        发布时间：2022-10-20
      • Mao Jun,Tian Song,Chen Hongyue
        Vol. 40, Issue 4, Pages: 143-147(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.031
        摘要：According to the force analysis of roller,the equation set of roller in the process of cutting by three- axis force is derived.Combining the MATLAB programming,the curve of the before and after roller load changing with the rotation angle under the oblique cut condition is obtained.With shearer machine as the research object,the whole machine mechanical equation is listed,the mathematical computing model is established.Based on MATLAB programming,combining with the before and after roller load changing curve under the oblique cut condition,the before and after sliding shoe load curves under the oblique cut condition is obtained.Due the contact relation between the sliding shoe and pin row and the principle of force mutual action,the curve of load acting on the pin rows under the oblique cut condition is achieved.And through the ANSYS Workbench simulation analysis,the stress distribution and deformation of pin rows of scraper conveyor are got.A reference for the future of design and analysis of damage causes of scraper conveyor pin row is provided.  
        关键词：Scraper conveyor;Pin row;Oblique cut condition;Loading analysis;ANSYS Workbench   
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        发布时间：2022-10-20
      • Liu Xinmeng,Zhang Liyong,Wang Changlu,Yang Huibo
        Vol. 40, Issue 4, Pages: 148-151(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.032
        摘要：The characteristic of precision planetary reducer are small size,high precision,small backlash and high stiffness.So it is widely used in robotics,machine tools,medical,military,printing and other industries.But the fatigue failure is easily to occur in precision planetary reduce for its small module,wide speed range and variable load.According to the characteristic of precision servo reducer,the gear dynamic meshing force and fatigue life of planetary gear train are obtained through the dynamics and collaborative simulation.The results show that the sun gear which is the weakness of system can well meet the design requirements.This method which using the dynamic meshing force to analyze the fatigue life of precision servo reducer is more in line with the actual working condition of the reducer.And it can provide the basis for product design and development.  
        关键词：Precise servo reducer;Dynamics simulation;Fatigue life   
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        发布时间：2022-10-20
      • Song Jun,Chu Chaomei,Tang Haichuan,Chen Jiejing
        Vol. 40, Issue 4, Pages: 152-156(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.033
        摘要：AMT is used in hybrid electric vehicle,and the motor and gearbox output shaft coupling rear twin-shaft type structure is adopted,so during the shifting time,the motor will provide power to drive the car,which play the advantages of high transmission efficiency,great capacity of torque and continuous output can play as stepless transmission power strength,and the power performance is improved.By solving the motor power torque during the process of shift,the vehicle simulation model is established in the Avl- Cruise and electric auxiliary strategy of vehicle is built in the MATLAB / Simulink for united simulation studying.The simulation results show that,in the process of shifting,the vehicle acceleration is not obvious drop,at the same time,the speed maintain upward trend,the power performance of vehicle can be improved.  
        关键词：AMT hybrid power;Power performance;Vehicle control strategy;United simulation   
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        发布时间：2022-10-20
      • Yan Tianxiao,Zhang Ruiliang,Wang Tie,Shi Ruonan,Liu Yaqiong,Jiang Xiongfei
        Vol. 40, Issue 4, Pages: 157-161(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.034
        摘要：The meshing impact of gear is the main vibration source and noise source of automobile transmission and the meshing impact of gears can be effectively reduced through modification.In order to explore the influence of different parameters on the vibration and noise of gear,the contrast experimental study on the dynamic characteristic of the modification gear is carried out,and the suitable modification parameters are obtained.The experimental results provide basic data for determining the modification parameters of gear.  
        关键词：Gear;Modification;Vibration;Noise   
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      • An Wendi,Zhang Xiaoxu,Wang Xin,Ji Xiubin
        Vol. 40, Issue 4, Pages: 162-164(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.035
        摘要：Based on planet phasing theory research,two groups 30 kW single stage double helical tooth planetary gear transmission system with different meshing phase characteristics are designed and manufactured.The vibration and noise signals of the two groups systems are collected under the same working condition by comparing test method.The obtained data is analyzed,and the effectiveness of the vibration and noise reduction of "vibration suppression technique of planetary gear system based on planet phasing"is verified.The results show that the vibration and noise of the gear mesh in the planetary transmission system can be effectively reduced by the planet phasing theory.  
        关键词：Planetary gear;Vibration suppression;Comparing test;Planet phasing   
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        发布时间：2022-10-20
      • You Jing,Zou Junwei,Huang Junqiong
        Vol. 40, Issue 4, Pages: 165-167(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.036
        摘要：Aiming at the three assembly process difficulties of pin hole connection between cases,planetary wheel bearing,planetary gear train of wind power increasing gearbox with the technical structure of planetary closed differential transmission,the deeply analysis of the assembly technical requirement of transmission twist pin between cases,the planetary wheel bearing,planetary gear structure is carried out.The technology solution is put forward and verified.  
        关键词：Wind power increasing gearbox;Assembly process;Torsion pin;Planetary wheel bearing   
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      • Wang Xin,Zhang Xiaoxu,Zhao Songtao
        Vol. 40, Issue 4, Pages: 168-171(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.037
        摘要：Based on the statistical energy analysis theory,a SEA model for a ship gearbox is established and through the theoretical analysis,the three important parameters of statistical energy analysis theory and the bearing dynamic load excitation of gearbox are determined.The high frequency vibration caused by the impact of the gear mesh can be effectively reduced by the gear modification.In order to get the effect of vibration and noise reduction,by using the statistical energy analysis theory,the simulation prediction of each gearbox subsystem vibration velocity and pressure level at a certain distance are carried out respectively in two conditions of gear modification or not.The study shows that,the statistical energy analysis theory can provide an effective method for the analysis of high frequency acoustic performance of gearbox.  
        关键词：Gearbox;Statistical energy method;Acoustic performance;Prediction   
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        发布时间：2022-10-20
      • Zhang Lei,Zhao Juan,Zhang Bin,Li Hongbiao,Shan Hongbo,Ge Kai,Yang Bo,Li Zhaochuan,Zhang Hongtao
        Vol. 40, Issue 4, Pages: 172-176(2016) DOI: 10.16578/j.issn.1004.2539.2016.04.038
        摘要：The wheel gearbox is a key component of Multi-axis super-heavy hybrid test platform,for the special nature of the application,on the one hand to meet the requirements of vehicle wheel power transmission requirements,while also meet lightweight and high reliability requirements.Therefore,in the wheel gearbox design,taking the lightweight for the wheel gearbox as the target,reliability as constraints,the optimization design scheme of the wheel gearbox is proposed.After the high- speed test,full load fatigue test and overload fatigue test verification,the wheel gearbox performance and reliability meet the requirements of super- heavy hybrid multi- axis test platform.  
        关键词：Wheel gearbox;Reliability optimization;Fatigue test   
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