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Analysis of high-speed angular ball bearing lubrication based on bi-directional fluid-solid coupling

Jiao Bowen, Bian Qiang, Wang Xinghong, Chunjiang Zhao, Chen Ming, Zhang Xiangyun

Archive of Mechanical Engineering

2023

LXX, nr 4

531--551

The lubrication of angular contact ball bearings under high-speed motion con- ditions is particularly important to the working performance of rolling bearings. Combining the contact characteristics of fluid domain and solid domain, a lubrication calculation model for angular contact ball bearings is established based on the RNG 𝑘-𝜀 method. The pressure and velocity characteristics of the bearing basin under the conditions of rotational speed, number of balls and lubricant parameters are analyzed, and the lubrication conditions and dynamics of the angular contact ball bearings under different working conditions are obtained. The results show that the lubricant film pressure will rise with increasing speed and viscosity of the lubricant. The number of balls affects the pressure and velocity distribution of the flow field inside the bearing but has a small effect on the values of the characteristic parameters of the bearing flow field. The established CFD model provides a new approach to study the effect of fluid flow on bearing performance in angular contact ball bearings.