方坑-半圆柱体叠加织构滑块润滑性能仿真与参数优化

Simulation and Parameter Optimization of Lubrication Performance of Square Pit Half Cylinder Superimposed Texture Slider

通过设计方坑-半圆柱体叠加织构,建立了不同面积占有率、不同深度、不同角度的方坑-半圆柱体叠加织构的流体动压模型,探索叠加织构不同几何参数对流体动压分布和油膜承载能力的影响。仿真结果表明:随着织构面积占有率的变化,方坑-半圆柱体叠加织构油膜承载能力呈先增加后减小趋势,织构深度对油膜承载能力的影响较小,具有一定倾角的织构能够提升滑块的动压润滑性能;当织构中方坑及半圆柱体深径比不变时,面积占有率为36%时流体动压效果较优,平均摩擦系数最小;在织构面积占有率不变时,深度为0.15 mm,织构倾角30°时动压效果较优,此时织构化滑块表现出优良的摩擦学性能。研究结果为进一步提升织构化特征滑块的润滑性能提供参考。

By designing the superimposed texture of the square pit and half cylinder,depth,and angle,the fluid dynamic pressure model is established for the superimposed texture of the square pit and half cylinder with different area occupancy,depth,and angle,exploring the influence of different geometric parameters of superimposed texture on fluid dynamic pressure distribution and oil film bearing capacity.The simulation results show that as the occupancy rate of the texture area changes,the load-bearing capacity of the oil film with the superimposed texture of the square pit and half cylinder first increases and then decreases,the influence of texture depth on the loadbearing capacity of the oil film is relatively small,the texture with a certain dip angle can improve the dynamic lubrication performance of the slider;When the depth to diameter ratio of the square pit and half cylinder remains unchanged in the texture,the fluid dynamic pressure effect is better when the area occupancy rate is 36%,and the average friction coefficient is the smallest;When the texture area share remains unchanged,the dynamic pressure effect is better when the depth is 0. 15 mm and the texture angle is 30°,at this point,the textured slider exhibitsexcellent tribological performance. The research results provide reference for further improving the lubricationperformance of the textured feature slider.