不同润滑油品对内燃机主轴承润滑性能的影响  

Influence of Different Lubricants on Lubricating Property of Main Bearings in IC Engine

作　　者：王刚志[1,2] 

机构地区：[1]天津科技大学,天津300457 [2]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《拖拉机与农用运输车》2012年第1期30-32,36,共4页Tractor & Farm Transporter

基　　金：天津市高等学校科技发展基金计划项目(20080412);天津科技大学引进人才科研启动基金项目(20080408)

摘　　要：建立了内燃机主轴承热弹性流体动力润滑模型,对3种不同牌号的润滑油品的润滑性能进行了计算研究。结果表明,使用3种润滑油,在低速和小负荷工况下,主轴承处于流体动力润滑状态,润滑性能良好;在中等转速中等负荷工况下,油膜厚度减小,油膜温度上升,摩擦功耗增加,但轴承仍能维持流体动力润滑状态;在高转速大负荷工况下,使用CD5W/30润滑油时,主轴承处于边界润滑状态,表明该润滑油不适合在模型机上使用。The lubricating properties of three different grades of lubricating oils were calculated and researched after the thermoelastohydrodynamic lubrication model of main beatings of ICE was established. The results show that the main bearing is in hydrodynamic lubrication state when three types of lubricants are used in the engine under low speed and low load operation conditions;under medium speed and load conditions, the main bearing still maintains lubrication state though oil film thickness decreases, oil film temperature rises, friction power increases;in high speed and load conditions, the bearing lubricated by CD5W/30 oil is in the boundary lubrication state,which indicates that the lubricant oil is not suitable for use in the model machine.

关 键 词：主轴承 热弹性流体润滑 润滑油 

分 类 号：TK421.9[动力工程及工程热物理—动力机械及工程]