加速工况下高速圆柱滚子轴承打滑分析

Skidding Analysis of High Speed Cylindrical Roller Bearing Considering Acceleration of Bearing

针对高速轻载圆柱滚子轴承打滑问题,在考虑轴承涡动、径向游隙变化和内圈加速工况基础上,建立了高速轻载圆柱滚子轴承运动学和动力学模型,研究了有无涡动、不同径向载荷、内圈加速度和径向游隙等因素对圆柱滚子轴承打滑特性的影响。研究结果表明:在轴承加速过程中,保持架转速、打滑率和油膜厚度均随时间呈上升趋势,但当涡动存在时会使保持架转速、打滑率和油膜厚度在上升过程中出现抖动;增大径向载荷和径向游隙有利于减小保持架的打滑率。

Aiming to the skidding of high speed cylindrical roller bearing,a kinematics and dynamics model of high speed cylindrical roller bearing is developed based on bearing whirl,radial clearance change and inner ring acceleration. The effects of acceleration,radical load,and radial clearance on bearing skidding are investigated. The results show that the cage speed,slip ratio and film thickness with jitter phenomenon increase with time during acceleration. The cage slip ratio could be reduced by increasing the radical load and radial clearance.