行星轮滚针轴承组件变形和接触性能研究  

Research on deformation and contact performance of planetary gear needle roller bearing assembly

作　　者：刘帅兵 牛荣军[1] 卞智毅 邓四二[1] LIU Shuaibing;NIU Rongjun;BIAN Zhiyi;DENG Si’er(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China;Luoyang Bearing Science and Technology Co.,Ltd.,Luoyang 471039,China;Luoyang Xinkai Bearing Technology Co.,Ltd.,Luoyang 471000,China)

机构地区：[1]河南科技大学机电工程学院,洛阳471003 [2]洛阳轴研科技有限公司,洛阳471039 [3]洛阳鑫凯轴承科技有限公司,洛阳471000

出　　处：《机械传动》2025年第3期15-23,32,共10页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(52105182);浙江省重点研发计划(2021C01095)。

摘　　要：【目的】为满足高功率密度和紧凑性的指标要求,行星齿轮被设计成薄壁结构,这使得行星齿轮刚度变小、容易变形,影响轴承的承载能力和寿命。针对该问题,基于弹性力学虚功原理和滚动轴承设计方法,分析研究了行星轮滚针轴承组件变形和接触性能。【方法】首先,运用虚功原理和滚动轴承设计方法建立了公-自转耦合下薄壁行星轮系力学分析模型;然后通过数值计算精确获取行星环挠曲变形曲线,以及轴承载荷分布和接触应力等性能参数,分析了驱动力矩和公-自转耦合对轴承承载能力和寿命的影响,并采用有限元仿真分析进行验证。【结果】结果表明,柔性行星环的挠曲变形对轴承载荷分布有明显影响,在实际行星轮系滚针轴承性能计算中,要考虑行星环形变和滚针接触性能的耦合作用;从滚针凸度修形考虑最佳方式是对数修形;轴承载荷和接触应力随公转速度和驱动力矩增大而增大,位置角55°~305°为滚针承载区域;轴承疲劳寿命随公转速度和驱动力矩增大而缩短。[Objective]To meet the requirements of high power density and compactness,the planetary gear is designed as a thin-walled structure,which reduces the stiffness of the planetary gear and makes it easy to deform,thereby affecting the bearing capacity and service life of the bearing.In response to this problem,the deformation and contact performance of the planetary gear needle roller bearing assembly were analyzed and studied based on the principle of virtual work in elastic mechanics and the design method of rolling bearings.[Methods]A mechanical analysis model of thin-walled planetary gear train with axial-rotation coupling was established by virtual work principle and rolling bearing design method,and verified by finite element simulation.The deflection curve of planetary ring,bearing load distribution,contact stress and other performance parameters were obtained by numerical calculation,and then the influence of driving torque and axial-rotation coupling on bearing capacity and life was analyzed.[Results]The results show that the flexural deformation of the flexible planetary ring has obvious influence on the load distribution of the bearing,and the coupling effect of planetary ring and needle roller should be considered in the calculation of the performance of the actual planetary gear train needle roller bearing.The best way to consider the convex shape of the needle roller is logarithmic.Bearing load and contact stress increase with the increase of revolution speed and driving torque,and the position angle 55°-305°is the bearing area of needle roller.Bearing fatigue life decreases with the increase of revolution speed and driving torque.

关 键 词：滚针轴承 接触性能 疲劳寿命 挠曲变形 

分 类 号：TH132.425[机械工程—机械制造及自动化]