关键词: ＥＨＡ, 表面织构, 金属／橡胶密封副, 摩擦因数, 润滑性能

Abstract: Based on the geometric model of the metal/rubber sealing pair of the electro-hydraulic actuator(EHA) and the theory of fluid lubrication,the numerical theoretical model of the dynamic pressure lubrication of the textured metal/rubber sealing pair is built.By simulation,research is conducted on the effects of texture parameters (area density and distribution angle of the crescent texture) and motion speed on the hydrodynamic lubrication performance of sealing pairs.The results show that:with the increase of the texture area density and distribution angle,the oil film bearing capacity has a tendency to increase first and then decrease.And when the texture density reaches 12.8% and the texture angle 90°,the oil film records its highest bearing capacity while the friction coefficient stands at its lowest point.The relative velocity between the friction pairs has an influence on the friction performance of the sealing pair.along with the increase of the relative velocity,the oil film bearing capacity increases whereas the friction coefficient decreases.The crescent micro-texture can effectively improve the friction performance of the metal/rubber sealing pair,and proper designs of the crescent texture parameters can significantly improve the lubrication performance of the metal/rubber sealing pair and enhance its wear resistance.