Abstract:The mechanical models of no interface slip,single interface slip and double interface slip were established by using mechanical equilibrium equation and hydrodynamic equation combined with wedge model.The effects of the surface textured distribution and different interface slip on the sliding velocity and friction force were studied by finite element method.The results show that when the interface slip occurs,the slip velocities of oil film in boost region and decompression region show nonlinear concave and convex variation laws,respectively.When the interface slip occurs on the upper surface and the lower surface of oil film,the maximum shear stress occurs on the upper surface and the lower surface respectively.When the interface slip occurs on both upper and lower surfaces,the maximum shear stress of oil film occurs on both upper and lower surfaces,and the values of the maximum shear stress are the same,while the friction force is significantly reduced by 4%~17% compared with the friction force of no interface slip.The model with surface texture distributed at the exit exhibits excellent effect of load bearing and friction reducing compared with the models with surface texture distributed the atentrance and the middle.The mechanism of interfacial slip of surface texture hydrodynamic journal bearing is that the lubricating oil has viscous property of Newtonian fluid.