发动机连杆小头轴承的润滑研究  

Research on lubrication of connecting rod small end bearing of engine

作　　者：任俊[1] 刘小君[1] 王伟[1] 刘焜[1] 

机构地区：[1]合肥工业大学摩擦学研究所,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2008年第3期347-351,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(50275046);安徽省自然科学基金资助项目(050440103)

摘　　要：文章将平均流量模型与微凸体接触理论相结合,建立了分析发动机连杆小头轴承润滑特性的数学模型和计算方法。主要研究了表面粗糙度对轴承流体润滑以及轴心轨迹的影响。结果表明,表面粗糙度越大,微凸体的承载量越大,峰元摩擦力也越大,膜厚比减小;同时表面粗糙度对轴心的位置有一定的影响,但对轴心轨迹的形状影响不大。Based on the combination of the average flow model with asperity contact theory, an analytical model is established which can be used to study the lubrication properties of the small end bearing of connecting rod of the engine. The results demonstrate that when surface roughness increases, the load capacity and the frictional force of surface asperities increase, but the oil film-thickness ratio decreases. The surface roughness does not have much influence on the shape of the locus of shaft center, but it has some effect on the eccentricity of shaft.

关 键 词：连杆小头轴承 表面粗糙度 润滑分析 轴心轨迹 

分 类 号：TK414.1[动力工程及工程热物理—动力机械及工程] TH117[机械工程—机械设计及理论]