基于弹流知识的球轴承设计

Design of ball bearings based on knowledge of elastohydrodynamic lubrication

基于点接触弹流知识与赤兹接触理论,对球轴承设计参数沟道半径系数和滚动体直径与节圆直径的比进行了分析,结果表明,沟道半径系数对微型轴承其取值范围较大;对小的沟道半径系数,滚动体直径与节圆直径的比的大小对形成油膜的能力影响较小,并且最大接触压力随沟道半径系数的变化大,而随滚动体直径与节圆直径的比的变化不大。

Based on the knowledge of elastohydrodynamic lubrication of elliptical contacts and the theory of Hertz contact mechanics, this paper 'analyzed the dessign for the factor of curvature difference and the ratio of ball diameter to pilch circle diameter. Results seem that a large value of the factor of curvature difference can be adopted for micro - bearings. And for a small factor of curvature difference, the effects of ratio of ball diameter to pitch circle diameter on lubrication and maximum contact pressure are small. While the factor of curvature difference has a quite large influence on the ability to form lubrication film and maximum Hertz contact pres-sure.