一种新型轴承式减速器的牵引传动接触应力分析  

Contact Stress Analysis of Traction Drives of a New Type Bearing Reducer

作　　者：舒红宇[1] 赵亮 余义杰 Shu Hongyu;Zhao Liang;Yu Yijie(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《机械传动》2023年第9期89-95,共7页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(51975069)。

摘　　要：在行星牵引传动的行星轮轮廓线轴端构建圆弧,并使该圆弧与外圈和太阳轮轴端面接触点保持在径向牵引接触线上;巧妙地替代推力轴承,设计出一种更为紧凑的新型轴承式减速器。结合装配过盈量、接触线的全圆弧素线修型及接触线边缘倒角的影响,对其径向接触应力与两端凸缘应力进行了分析;建立了多组3D理想模型,并采用Abaqus软件对其进行分析。结果表明,轴承式减速器外圈、行星轮、太阳轮接触线均存在边缘应力集中现象;合理的接触线素线修型和边缘倒角能使接触应力均匀且改良边缘效应;改善牵引传动的接触应力的最好方法是接触线素线修型和边缘倒角同时进行;凸缘处接触应力在不同凸度修型时分布及大小基本相同,且行星轮与外圈、太阳轮的接触线与凸缘的轴向和径向接触能保持在一条牵引线上。An arc is constructed at the end of the planetary wheel profile shaft of the planetary traction drive,and the contact point between the arc and the outer ring and the end face of the solar wheel shaft is kept on the radial traction contact line.A new type of a more compact bearing reducer is designed by replacing thrust bearings cleverly.In this study,the radial contact stress and flange stress of the contact line are analyzed based on the assembly interference,the full arc element line modification and the influence of the contact line edge chamfering.Several sets of 3D ideal models are established and analyzed by Abaqus software.The results show that the edge stress concentration exists in the contact lines of the outer ring,planetary wheel and solar wheel of the bearing reducer.Reasonable contact-element trimming and edge chamfering can make contact stress uni⁃form and improve edge effect.The best way to improve the contact stress of traction drives is to modify the con⁃tact element and chamfering the edge simultaneously.The distribution and size of the contact stress at the flange are basically the same under different convexity modification,and the axial and radial contacts between the con⁃tact line of the planet wheel and the outer ring and the contact line of the sun wheel and the flange can remain on a traction line.

关 键 词：行星牵引传动 接触应力 轴承式减速器 素线修型 

分 类 号：TH132.46[机械工程—机械制造及自动化]