热和离心位移对球轴承刚度影响的数值分析  

Numerical Analysis for Impact of the Heat and Centrifugal Displacement on the Stiffness of Ball Bearings

作　　者：丁洪福[1] 景敏卿[1] 王风涛[1] 刘杨[1] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《机械设计与制造》2016年第4期194-197,202,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51175410);河南煤化基础重大科研项目(2011LYC01-01)

摘　　要：针对高速角接触球轴承刚度影响因素多、精确预测困难的特点,基于拟静力学模型考虑了离心力、陀螺力矩、轴承套圈热变形和内套圈离心膨胀等多种因素影响,计算了轴承动态刚度,分析了工况和结构参数对轴承动态刚度的影响。分析结果表明:热和离心效应使轴承轴向刚减小,径向刚度增加,对轴承动刚度影响不容忽视;轴向和径向刚度随轴向载荷增加而增大,随径向载荷增加而减小;不考虑热和离心效应时轴向刚度随内沟曲率系数增加而明显减小,考虑热和离心效应时轴向刚度略有增加;轴向和径向刚度随外沟曲率系数增加而减小;转速和球径对轴承刚度影响较复杂,是转速和球径综合作用结果。Dynamic stiffness of high-speed angular contact ball bearings affected by many factors is difficult to be accurately predicted. The dynamic stiffness of angular contact ball bearings is calculated based on the quasi-statics model considering the impact of the centrifugal force,gyroscopic moment,thermal deformation of rings and balls and centrifugal expansion of the inner ring. The effects of the working condition and structural parameters of bearings on the dynamic stiffness of bearings are analyzed. The results show that the heat and centrifugal effect reduces axial stiffness and enhances radial stiffness and cannot be ignored;the axial and radial stiffness increases with an increase in axial load and decreases with an increase in radial load; axial stiffness significantly decreases with an increase in the inner groove curvature coefficient without considering the thermal and centrifugal displacement and slightly increases considering the thermal and centrifugal displacement; axial and radial stiffness decreases with the increase of outer groove curvature coefficient;The combined effects of speed and ball diameter in stiffness are more complex.

关 键 词：拟静力学模型 角接触球轴承 动态刚度 热和离心效应 

分 类 号：TH16[机械工程—机械制造及自动化] TH123