In order to explore the influence mechanism and law of micro-texture parameters of pits on lubrication performance of friction pairs,a three-dimensional fluid lubrication model considering cavitation effect was established,and CFD numerical calculation was carried out by Workbench software.The effects of micro-texture shape,depth to width ratio and area density on the net pressure increase and friction coefficient of micro-texture oil film were studied by simulation.The results show that the existence of cavitation effect is the key factor to generate the net pressure increase of oil film.Compared with the other three kinds of concave micro-texture,the circular concave micro-texture has larger net pressure increase of oil film and smaller friction coefficient,and the lubrication performance of friction pair is better.With the increase of micro-texture depth to width ratio and area density,the results show a certain rule,that is,the net oil film pressure increases first and then decreases,and the friction coefficient decreases first and then increases.The optimal depth to width ratio and area density of circular pit micro-texture are found,which are 0.02 and 20％respectively.
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