高速角接触球轴承接触角计算与影响因素分析

摘要:

以弹性力学理论、滚动轴承动力学和沟道控制理论为基础，计算了高速角接触球轴承内圈外径在离心力作用下的径向位移，给出了计及内圈径向位移、过盈配合量和预紧力影响时，高速角接触球轴承接触角的计算方法。对7012/CD轴承的计算结果表明：当轴承转速较高时，受内圈径向位移的影响，随转速的继续增加内接触角不升反降，外接触角的减小也趋缓；轴向预紧力对轴承接触角随转速的变化有抑制作用；过盈配合量对接触角随转速的变化没有影响。

关键词:角接触球轴承;接触角;影响因素

Abstract:

Based on the elastic theory, dynamics and raceway control theory of the rolling bearing, inner ring radial displacement of angular contact ball bearing caused by centrifugal force was calculated. In consideration of inner ring radial displacement, interference fit and preload, the comprehensive method and its corresponding program were given for calculating the contact angular of angular contact ball bearing during high-speed rotating. The calculated results taking 7012/CD bearing as an example show that because of inner ring centrifugal displacement, inner contact angular tend to decrease and the decrease of outer contact angular tend to slow with the increase of rotation speed when its rotation speed exceed a certain number; axial preload can restraint the variation of contact angular with the rotation speed; the interference fit has no effect on this variation of contact angular.  

Key words:角接触球轴承;接触角;影响因素