【摘要】 基于摩擦学理论和缸套/活塞环的润滑磨损特征,采用激光微造型技术,在缸套内表面进行规则微观几何形貌的造型。通过分析缸套/活塞环摩擦副的物理模型,建立了具有规则微观几何形貌特征的缸套内表面润滑理论模型,用变异的多重网格法进行了数值求解,并对微观几何形貌参数进行了初步的优化设计。研究结果表明,即使在两个平面摩擦副上进行简单的激光微凹腔造型,也能维持良好的动压润滑效果。同时得出,微凹腔的面积占有率为150/0、深径比为0.5时,润滑油膜厚度增加了100/0~150/0,平均摩擦力减小了200/0,润滑减磨效果较好。更多还原

【Abstract】 Based on the theory of tribology and the wear characteristics of cylinder bore-piston ring,the regular micro geometric surface topography was honed on the cylinder bore using the technology of laser texturing.The theoretical lubricating model of the tribopair that taking into account of micro geometric surface structure was developed by analyzing the physical model of cylinder bore-piston ring.Modified multi-grid method is used to solve the theoretical model,and cylinder wall surface micro geometry shape parameters are optimally designed.The results show that surface texturing with micro-pores can be used to maintain hydrodynamic effects even on nominally parallel surfaces.Optimal parameters for lubrication performance are also given.The area occupancy of micro-pores is 15⁰/₀,and the depth-diameter ratio is 0.5.Lubrication oil thickness is increased by 10⁰/₀¹5⁰/₀ and average friction force is decreased by 20⁰/₀ with cylinder bore processed as the proposed parameters.更多还原