Complete numerical analysis for mixed boundary and thermal elastohydrodynamic lubrication in steady-state point contacts

摘要

A numerical analysis was carried out for the mixed, thermal elastohydrodynamic lubrication (EHL) in steady-state point contacts, which enables EHL and boundary lubrication to exist at the same time. It was assumed that the boundary films kept a constant thickness and, approximate Reynolds and energy equations for the boundary films were proposed. For the fluid film the lubricant was assumed to be Newtonian. In the whole domain the pressure field was solved with a multi-grid method. The surface deformation was solved with a multilevel multi-integration technique, and the temperature field was solved column by column with a finite difference scheme. The relation between the ratio of boundary and fluid lubricating areas was investigated. The temperature effects with different slide-roll ratios were discussed.