预紧力对内燃机排气凸轮/挺柱间润滑的影响研究  

Influence of Preload on the Lubrication of a Cam-tappet Pair in an Internal Combustion Engine

作　　者：常秋英[1] 杨沛然[2] 

机构地区：[1]北京交通大学机械与电子工程学院,北京100044 [2]青岛理工大学机械系,山东青岛266033

出　　处：《润滑与密封》2007年第2期10-12,共3页Lubrication Engineering

基　　金：中国博士后基金资助项目(023205207);国家自然科学基金资助项目(50475165)

摘　　要：用数学仿真的方法对内燃机排气凸轮/挺柱摩擦副进行了热弹性流体动力润滑研究,在此基础上研究了凸轮/挺柱间的预紧力对摩擦副润滑的影响。在程序中预紧力分别取100 N、150 N和225 N,3种预紧力下计算所得的接触区中心压力、最小油膜厚度、摩擦因数和润滑油最高温度表现出不同的变化趋势。从计算结果来看,在保证其它要求的前提下预紧力越小对润滑越有利。Thermoelastohydrodynamic analysis of a tam-tappet contact of an internal combustion engine with mathematical simulation techniques. Based on the mathematical model the influence of the preload on of friction pair was investigated. Three preloads of 100 N,150 N and 225 N were chosen. Result shows that behaviors, including the pressure, the film thickness and the friction coefficient, variy significantly with the was performed the lubrication the lubrication change of the preload. Smaller preload is more favorable for lubrication under the condition to assure the good tightness of the diesel＇ s valve.

关 键 词：凸轮 预紧力 润滑 摩擦因数 

分 类 号：TH117.2[机械工程—机械设计及理论]