内燃机径向滑动轴承润滑特性及影响因素研究  

Research on the Lubrication Characteristics and Influencing Factors of the Journal Bearing in Internal Combustion Engine

作　　者：聂涛 刘振明[1] 刘楠[1] 安士杰[1] NIE Tao;LIU Zhen-ming;LIU Nan;AN Shi-jie(School of Power Engineering Naval University of Engineering,Wuhan 430033,Hubei)

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033

出　　处：《计算机仿真》2019年第1期263-267,共5页Computer Simulation

基　　金：海军工程大学自主立项基金(425517k142)

摘　　要：研究内燃机连杆大端径向滑动轴承润滑特性问题,为了能够准确预测连杆大端轴承最大油膜压力和最小油膜厚度,在曲柄连杆动力学分析的基础上,建立了某型内燃机连杆大端轴承弹性流体动力学仿真模型。在工况不变的条件下,对该型内燃机连杆大端轴承油膜的最大油膜压力及最小油膜厚度的变化情况进行了研究,得到了一个工作循环内任意时刻大端瓦油膜压力分布,并对轴承的工作状态进行了分析。同时研究了径向间隙、供油压力对最大油膜压力及最小油膜厚度的影响,研究的结果表明:最小油膜厚度随供油压力的增大而增大;并且径向间隙越小,供油压力对最小油膜厚度的影响就越大。In order to research the lubrication characteristics of the big end bearing and its influencing factors,based on dynamics analysis of the crank and connecting rod mechanism in diesel engine,an elasto-hydrodynamics simulation model was established. The changes of the minimum oil film thickness and maximum oil film pressure were studied under the condition of the same working condition,and also the oil film pressure distribution of the big end bearing owas obtained. The effects of different factors such as bearing clearance and oil supply pressure,were also analyzed. The research results indicate that the minimum oil film thickness increases with the increase of oil supply pressure,and the smaller the radial clearance,the greater the influence of oil supply pressure on the minimum oil film thickness.

关 键 词：内燃机 轴心轨迹 最小油膜厚度 径向滑动轴承 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]