采用二维润滑模型的缸套-活塞环润滑分析

本资料包含pdf文件1个，下载需要1积分

By taking the friction pair of cylinder liner and piston ring of engine as research object, based on average two- dimensional transient Reynolds equitation and micro-protruding asperity contact model, cylinder liner-piston rings two-di- mensional transient fluid hydrodynamic pressure lubrication model was set up. By considering the factors such as surface roughness, variable viscosity effect of lubrication oil as well as the deformation along peripheral direction of cylinder and so on, the minimum oil film thickness, friction force and so on were obtained by computation under fluid hydrodynamic pres- sure lubrication, and were compared with the results computed by using one-dimensional model. The results indicate that, the computation results are almost the same for minimum oil film thickness and friction force of two kinds of model, but by using two-dimensional lubrication model,the pressure distribution on surface of piston ring can be effectively analyzed to obtain the oressure distribution character on surface of piston ring that can not be solved by one-dimensional model.以发动机缸套一活塞环摩擦副为研究对象，基于二维瞬态平均Reynolds方程与微凸体接触模型，建立缸套一活塞环二维瞬态流体动压润滑模型。考虑缸套一活塞表面粗糙度、润滑油的变黏度效应以及汽缸套圆周方向形变等的影响，计算得到二维流体动压润滑下的最小油膜厚度、摩擦力等，并与采用一维模型计算得到的结果进行比较。结果表明，2种模型的最小油膜厚度、摩擦力的计算结果几乎是相等的，但采用二维润滑模型能够有效地对活塞环表面压力分布情况进行分析，并得到采用一维模型无法求解的环面压力分布特征。