Investigation on the effect of sealing condition on the internal flow pattern of high-speed ball bearing

Aimed at good lubrication performance of angular contact ball bearing at high rotating speed, the research of bearing internal oil-air two-phase flow, air vortexes and blocks are crucial but insufficient. By setting up a high precise numerical model with different nozzle distribution and annular inlet flow, the oil-air two-phase flow inside bearing cavity was investigated in consideration of different sealing condition and intake systems. The temperature and air pressure distribution, air-flow pattern and oil volume fraction were all discussed. The results show that, lubricating oil is easier to access the contact region inside bearing cavity with the help of seal structure. At high rotation speed, the temperature and pressure distribution of bearing with dual-nozzle is superior to single-nozzle.