Improving the Working Performance of Sliding Friction Pairs Using Optimal Asymmetric Textures

Optimizing the parameters of asymmetric textures (AT) designed on the surface of sliding frictional pairs (SFP) can make each texture more reasonably distributed. Thereby, the oil film thickness can be more stable; and the lubrication and load ability of SFP can be improved. To clarify this issue, based on the SFP’s lubricating model added by AT using the rectangular structure, parameters of AT including the angle between the horizontal axe and bottom surface (φ_ij), the angle between the lateral axe and bottom surface (γ_ij), and texture’s depth (h_ij) are optimized. The study results show that the parameters of φ_ij, γ_ij, and h_ij of AT optimized can create the p (hydrodynamic pressure of liquid) better than the symmetric textures. Significantly, the p_max and load ability of the liquid in the SFP using optimal AT have been greatly increased compared to the liquid in the SFP using the symmetric textures. Accordingly, the results are an important reference for the design and distribution of AT on the surface of journal bearings to further improve the lubrication and friction efficiency.