耦合颗粒形态和粗糙表面影响的摩擦副热效应  

Combined effect of the rough surface and particle morphology on the thermal property of the tribopair

作　　者：刘焜[1] 王伟[1] 张斌[1] 焦明华[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2006年第11期1341-1345,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：文章引入颗粒形态和表面粗糙度的影响,结合雷诺方程、粘温方程、颗粒和微凸体变形及能量方程等建立了颗粒和微凸体接触时的摩擦模型;探讨了颗粒形状分别为圆形和六边形,微凸体轮廓分别为余弦和圆弧时,颗粒和摩擦副的接触温度及其对流体的温度、压力分布的影响;研究结果表明,圆形颗粒的承载量比六边形颗粒的承载量大,与微凸体的接触温度也较大,而存在圆形颗粒的流体摩擦力以及总摩擦力较小。A liquid-solid mixed lubrication model is proposed,and the Reynolds equation, the viscosity-temperature relationship, deformation of particles, deformation of asperities and the energy equation are all described. Based on the assumptions that the particle is round or hexagonal and the asperity contour is round or cosinoidal, the rubbing temperature of the particle on the asperity is studied as well as its effect on the temperature and pressure properties of the liquid. The results suggest that the load capacity of round particles is bigger than that of hexagonal ones, and that the round particles produce more heat of rubbing on the asperity than hexagonal ones. On the other side, the liquid mixed with round particles produces less liquid friction force.

关 键 词：颗粒 微凸体 接触 温度 

分 类 号：TH117.1[机械工程—机械设计及理论]