内燃机主轴承热弹性流体动力润滑研究  

Thermo-Elastohydrodynamic Lubrication Research of Main Bearings in IC Engines

作　　者：王刚志[1,2] 郝延明[1] 马维忍[2] 李兆文[2] 

机构地区：[1]天津科技大学理学院,天津300222 [2]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机工程》2010年第5期63-68,共6页Chinese Internal Combustion Engine Engineering

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计算的数学模型和有限元模型。依此模型,对某4缸柴油机的5个主轴承进行了计算,分别算出其在一个工作周期内的最大油膜压力、最小油膜厚度、最高油膜温度、摩擦功耗和轴心轨迹。计算结果表明:3号主轴承所受到的载荷峰值最小,一个工作周期内的平均载荷最大,平均油膜厚度最小,油膜温度最高,平均油膜压力和摩擦功耗最大。3号主轴承的润滑状况不佳,应对其进行优化设计。The mathematical and finite element models were established to conduct thermo-elastohydrodynamic lubrication calculation for five main bearings of a four-cylinder diesel engine.Lubrication parameters of every bearing i.e.max.oil film pressure,min.oil film thickness,max.oil film temperature,friction power loss and orbital path in an engine working cycle were calculated.It is found that of the five main bearings,the No.3 main bearing is subjected to the max.cycle average load,the min.average oil film thickness,the max.oil film temperature,max.average friction power loss,though its peak load is minimal and oil film pressure is maximal.The No.3 main bearing should be submitted to optimization design to improve its poor lubrication condition.

关 键 词：内燃机 主轴承 热弹性流体动力润滑 数值模拟 

分 类 号：TK424.11[动力工程及工程热物理—动力机械及工程]