关键词: 弹流润滑, 接触因子, 矩阵, 挺杆, 凸轮

Abstract: 　　Nonsteady PEHL process of engine cam-tappet pair of rough surface is described with Wu Chengwei and Zheng Linqing’s contact factor model, and the line contact nonsteady PEHL equations are solved with a method of fast solving equations of EHL. Therefoce, lubricating process of cam-tappet pair is further analysizeds the behavior of surface asperity of cam-tappet in lubricating process is indicated. The conclusion supplies, the theoretical basis for analyzing mechanism of scoring, pitting of cam-tappet and establishing transient wear model. The present algorithm can also be extended to analyze line contact transient PEHL problems of other mechanical systems.

Key words: Cam, Contact factor half width of matrix, Nonsteady partial elastohydrodynamic lubrication, Tappet