摘要
针对高速角接触球轴承腔内润滑冷却问题,采用VOF模型和多重坐标系(MRF)法对高速角接触轴承腔内润滑油流动特性进行数值分析,分析油气出口位置对轴承腔内油相体积分数和温升的影响。结果表明:轴承腔内的油相体积分数和温升在周向上分布并不均匀,油相体积分数最低处和温升最高处位于沿轴承回转方向相对入口240°位置;从180°到240°改变油气出口沿轴承回转方向相对入口角度时,轴承腔内温升降低且油相体积分数增大,从240°到270°改变相对入口角度时,轴承腔内温升升高且油相体积分数减小;当转速升高时,出口位置对轴承腔内油相体积分数和温升影响减弱,油相分布与温升分布在周向上更为均匀。因此,选择合适的油气出口位置能够得到更好的润滑效果。
In order to solve the problem of lubrication and cooling in high-speed angular contact ball bearing cavity,the flow characteristics of oil-air two phase in the high-speed angular contact bearing cavity were numerically analyzed by the volume of fluid(VOF)method and moving reference frame(MRF)model,and the effect of outlet location on oil phase volume fraction and temperature rise in bearing cavity were investigated.The results show that the oil phase volume fraction and temperature distribution in the bearing chamber are not evenly distributed in the circumferential direction,the lowest oil phase volume fraction and the highest temperature rise are located at 240°relative to the inlet along the direction of bearing rotation.When changing the angle of outlet position from 180°to 240°,the temperature rise in the bearing cavity is decreased and the oil phase volume fraction is increased,when changing the angle of outlet position from 240°to 270°,the temperature rise in the bearing cavity is increased and the oil phase volume fraction is decreased.When the rotating speed is increased,the influence of the outlet position on the oil phase volume fraction and temperature rise is weakened,and the distribution of oil phase and the temperature rise are more uniform in the circumferential direction.Therefore,choosing the position of outlet can get better lubrication effect.
作者
王保民
白晨
王综
WANG Baomin;BAI Chen;WANG Zong(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第6期28-33,100,共7页
Lubrication Engineering
基金
国家自然科学基金项目(51965038).
关键词
角接触球轴承
出口位置
油气两相流
轴承腔
温度场
angular contact ball bearing
outlet position
oil-air two-phase flow
bearing chamber
temperature filed
