计及套圈变形的电主轴角接触球轴承动刚度分析  

Dynamic stiffness analysis for motorized-spindle angular contact ball bearings considering ferrule deformation

作　　者：陈小安[1] 刘俊峰[1] 陈宏[1] 周明红[1] 单文桃[1] 

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：《振动与冲击》2013年第2期81-85,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51005259);国家重点传动试验室访问学者基金项目(KFKT-200801);中央高校基本科研业务费资助(CD-JXS11111143)

摘　　要：针对高速电主轴结构特点,应用弹性力学和滚动轴承动力学理论,建立考虑内圈弯曲变形影响的角接触球轴承动刚度分析模型,探讨不同工况下内圈的径向挠度及其对轴承动刚度的影响,最后在12MD60Y6型号电主轴上进行轴承动刚度测试。理论和实验结果表明,内圈径向挠度和轴承的轴向载荷成正比、与转速成反比,在重载条件下其值不容忽视。考虑内圈径向挠度的轴承动刚度计算结果更接近实验结果。According to structural characteristics of high-speed motorized spindles, an analysis model for dynamic stiffness of angular contact ball bearings taking the effects of bending deformation of inner ring into account was set up by using mechanics of elasticity and dynamics of rolling bearings. In addition, radial deflection of inner ring under different operating conditions and its effect on bearing dynamic stiffness were discussed. Finally, a test of bearing dynamic stiffness was conducted on a 12MD60Y6 motorized spindle. The simulation and test results indicated that radial deflection of inner ring is directly proportional to bearing axial load and inversely proportional to rotational speed, and it can not be ignored in heavy load condition; the simulation results of bearing dynamic stiffness considering radial deflection of inner ring agree better with the test ones.

关 键 词：高速电主轴 角接触球轴承 内圈径向挠度 动刚度 

分 类 号：TH133[机械工程—机械制造及自动化]