Numerical investigation of the air–oil two-phase flow inside an oil-jet lubricated ball bearing
Numerical investigation of the air–oil two-phase flow inside an oil-jet lubricated ball bearing
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2013.09.013
复制
发表时间：
2014
影响因子：
5.2
通讯作者：
Jibin Hu;Wei Wu;Wu Mingxing;Shihua Yuan
中科院分区：
文献类型：
--
作者：
Jibin Hu;Wei Wu;Wu Mingxing;Shihua Yuan
采用CFD方法研究了油喷射润滑球轴承内部的气-油两相流动。采用多相流的VOF方法对气油两相流进行了跟踪。滑动网格平面应用于轴承内部流场和轴承外部流场之间。结果表明，油喷射润滑球轴承内部的气油分布不均匀。最低的油体积分数出现在靠近喷嘴的上游一侧。在更快的轴承内，空气-油相的流速和压力增加。随着转速的增加，平均油体积分数逐渐降低。随着油流量的增加，轴承中的油体积分数和对滚动元件和保持架旋转的阻力增加。气油分布的不均匀性也增强了。油喷射润滑球轴承的传热分析应考虑非均匀气油分布。根据油-油润滑球轴承内部的气-油分布对油-油润滑进行优化，对于实现更小的阻力损失和更大的冷却效果具有重要意义。
The air–oil two-phase flow inside an oil-jet lubricated ball bearing was investigated by the CFD method. The VOF method for multiphase flow was used to track the air–oil two-phase flow. The sliding mesh plane was applied between the flow field inside the bearing and the flow field on both outsides of the bearing. The results suggest that the air–oil distribution inside the oil-jet lubricated ball bearing is not uniform. The lowest oil volume fraction appears in the upstream side near the nozzle. The flow velocity and the pressure of the air–oil phase increase inside a faster bearing. The average oil volume fraction becomes lower as the speed increases. With the increase of the oil flow rate, the oil volume fraction in the bearing and the drag against the rotation of the rolling elements and cage increase. The nonuniformity of the air–oil distribution is also enhanced. The nonuniform air–oil distribution should be considered for the heat transfer analysis of the oil-jet lubricated ball bearing. Optimizing the oil-jet lubrication according to the air–oil distribution inside the oil-jet lubricated ball bearing is significant for the high-speed rotation to achieve lower drag loss and greater cooling effect.