Investigation of Oil-Air Flow and Temperature for High-Speed Ball Bearings by Combining Nonlinear Dynamic and Computational Fluid Dynamics Models

An improved nonlinear dynamic model of high-speed ball bearings with elastohydrodynamic lubrication is adopted to predict the movements of balls and power loss of ball bearings for defining the boundary conditions of a computational fluid dynamics (CFD) model. Then, this method of combining nonlinear dynamic and CFD models is validated through the experimental verification. Subsequently, oil-air flow and temperature distribution inside the bearing chamber are studied at low and high speeds and light and heavy loads. The effect of nozzle's position on the formation of oil film and heat dissipation is revealed under combined loads. The research results provide a theoretical basis for engineering application of high-speed rolling bearings.

Automated summary

This study combines an improved nonlinear dynamic model and a computational fluid dynamics (CFD) model to investigate the movements and power loss of high-speed ball bearings. It also examines the oil-air flow and temperature distribution inside the bearing chamber. The research results have important theoretical implications for the engineering application of high-speed rolling bearings.