Effect of Density Flow Factor on Thermal Elastohydrodynamic Lubrication of Infinite Line Contact Rough Surfaces

摘要

A numerical solution of a thermal elastohydrodynamic lubrication (EHL) of infinite line contact rough surfaces is obtained. The effect of density flow factor on the bearing characteristics is studied based on an average flow model of rough surface lubrication with inter-asperity cavitation. The modified average Reynolds equation, elasticity equation and energy equations are solved simultaneously using a modified Houpert and Hamrock fast approach. The inclusion of density flow factor influences the bearing characteristic for thermal rough EHL. The minimum film thickness increases by 20% approximately for longitudinally oriented surfaces when the inter-asperity cavitation is considered.