基于热-力耦合的陶瓷球轴承摩擦力矩分析

Friction Torque Analysis of Ceramic Ball Bearing Based on Thermal-Mechanical Coupling

滚动轴承摩擦力矩是导致轴承发热的主要因素,为准确描述轴承摩擦力矩与温升的耦合关系,基于滚动轴承拟动力学及弹流润滑理论,考虑轴承预紧力、离心效应、热膨胀等影响,建立了基于热-力耦合的陶瓷球轴承摩擦力矩计算模型,并试验验证了模型的正确性。分析了不同工况条件及轴承结构参数对陶瓷球轴承摩擦力矩的影响,计算结果表明:陶瓷球轴承摩擦力矩受载荷、转速、预载荷影响较大;合理选择轴承的结构参数以及润滑油温度均有助于降低轴承整体的摩擦力矩。

Rolling bearing friction torque is the main factor leading to bearing heating and wear,In order to more accurately describe the changing law of bearing friction torque,it is based on the theory of pseudo-dynamics and rolling bearing thermal grid,based on elasticity Flow lubrication theory,establish a ceramic ball bearing force-thermal coupling model,analyze the influence of different working conditions and bearing structural parameters on the friction torque of ceramic ball bearings.The calculation results show that the friction torque of ceramic ball bearings is greatly affected by load,speed and pre-load.Reasonable selection of bearing structural parameters and lubricating oil temperature are helpful to reduce the overall friction torque of the bearing.