降低CVT变速箱输出轴圆锥滚子轴承摩擦力矩方法

用于CVT变速箱输出轴外侧的圆锥滚子轴承在变速箱台架耐久试验70%的循环时间出现了黏着磨损失效,经分析是因轴承摩擦力矩较大引起的。对影响圆锥滚子轴承的摩擦力矩主要因素进行分析,对现有结构进行优化设计,从而降低滚子与内圈挡边、滚子和滚道的摩擦。经过试验检测,改进后轴承摩擦力矩低于改进前摩擦力矩,同时也通过了客户的变速箱耐久台架试验。此次变速箱输出轴圆锥滚子轴承改进案例为圆锥滚子轴承低摩擦设计提供了依据。

Method to Reduce Friction Torque of Tapered Roller Bearing Which is used for Output Shaft of CVT

For the tapered roller bearing used for output shaft of CVT gearbox,adhesive wear failureoccurred at 70%cycle time of the transmission stand durability test.Analysis tells that the large friction torqueis the main reason for failure.Analyzing the main factors affecting friction torque of tapered roller bearing,and optimization design for the existing bearing's structure is made to reduce the friction between roller and inner/outer raceway and the friction between roller-end and inner ring's rib.After detection testing,the friction torque of the improved bearing is lower than before.In the meantime,the improved bearing passes the transmission's bench durability test.This case provides a basis for the low friction design of tapered roller bearing.