Analysis of Thermal Effect on Elastohydrodynamic Lubrication in Angular Contact Ball Bearing

摘要

Based on the theory of point contact thermal elastohydrodynamic lubrication（EHL）, the mathematical models for the thermal EHL of high-speed angular contact ball bearing are established. Multi-grid method and multigrid integration method are respectively used to calculate out the film pressure and film thickness respectively, and the column-by-column scanning method is used to calculate temperature rise of isothermal EHL and thermal EHL. The calculation results show that, under the pure rolling condition, temperature rise of oil film temperature is mainly caused by the compression work and shear heat at inlet and the heat in contact zone mainly comes from the inlet and the heat conduction around; the temperature rise results in oil viscosity lower and the lubricating film thinner, in this way it reduces the lubrication performance in contact pair.