面向润滑增效的轴承套圈表面沟槽结构设计

To improve the lubrication efficiency of high-speed bearings, the lubrication efficiency enhancing groove structure on bearing ring surface is systematically analyzed. For an angular contact ball bearing, combining visual analyses with quantitative experiments, a groove structure on the ring surface with changed parameters such as rotating speed and nozzle position, is optimized. Based on the volume of fluid method (VOF), a model for revealing flow behavior on the grooved bearing inner ring surface is established, then the flow in the grooves is quantitatively investigated by the experiments. The effects of different nozzle positions, groove widths and rotating speeds on the efficiency of lubricating oil flow are compared. According to the oil flow characteristics, the optimal arc groove structure is designed. The results show that at different speeds and nozzle positions, there exists an optimum groove width most suitable for lubrication efficiency; the optimum groove width increases with the distance between the nozzle and the end surface. The arc groove enables to improve the enhancing efficiency for lubricating oil flow; the higher the speed, the better the effect of large arc groove.