The Research on Oil-air Lubrication and Oil Lubrication in the Rolling-sliding Friction Element

A cylindrical roller friction pair with rolling sliding contact in the friction and wear testing machine was adopt to simulate the gear surface friction state at the meshing point within the largest slide-roll ratio of a high power gear that used in a ship. The comparative simulation test of oil-air lubrication and oil lubrication on the rolling-sliding friction element which considers the friction coefficient, friction area temperature and surface roughness of the sample as the evaluation index, was carried out. The simulation results show that the oil-air lubrication has a better performance, its friction coefficient is a little higher, the temperature decreased by 26.3 to 58.2 percent and the specimen after test has a lower surface roughness.