考虑表面缺陷的角接触球轴承非线性动力学分析

Nonlinear Dynamic Analysis on Angular Contact Ball Bearings Considering Surface Defects

针对机床主轴用角接触球轴承,建立考虑沟道表面缺陷和油膜切向摩擦力影响的轴承-转子系统的动力学模型,运用4阶Runge-Kutta法求解非线性运动微分方程组,研究沟道表面缺陷的数目、位置和分布对轴承振动的影响。结果表明:多个缺陷、内沟道缺陷及均匀分布的缺陷都会引起轴承较大的振动,且存在特征频率。研究结果为滚动轴承的状态监控和故障诊断提供了理论支持。

The dynamic model for bearing-rotor system is established considering influences of surface defects on raceway and tangential friction force of oil film for angular contact ball bearings used in machine tool spindle.The fourth order Runge-Kutta method is used to solve nonlinear differential equations of motion,and the effects of number,position and distribution of raceway defects on vibration of the bearings are researched.The results show that the multiple defects,inner raceway defects and evenly distributed defects induce larger vibration of the bearings,and the characteristic frequency is existed.The research results provide theoretical support for status monitoring and fault diagnosis of rolling bearings.