粘温效应对十字头滑块与活塞裙润滑影响分析  

Influence of temperature on lubricant viscosity in the crosshead slipper and piston skirt

作　　者：李瑞 孟祥慧[1] LI Rui;MENG Xianghui(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院

出　　处：《哈尔滨工程大学学报》2019年第12期1980-1985,共6页Journal of Harbin Engineering University

基　　金：高技术船舶科研计划项目(CDGC01-KT0305);国家自然科学基金项目(51875344)

摘　　要：为了研究船用低速二冲程柴油机关键摩擦副的摩擦动力学问题,本文依据多体动力学和混合润滑的基本原理,考虑润滑油的粘温效应,分析了工作温度下十字头滑块与活塞裙的摩擦学与动力学特性,并与冷态分析结果做了对比。结果表明:在工作温度下,十字头滑块和活塞裙的摩擦损失更小,但二阶运动更剧烈。同时,剧烈的二阶运动使得十字头滑块在发火上止点后,主推力侧的最小膜厚明显降低。To study the tribo-dynamics of the critical friction pairs in low-speed marine diesel engines based on the principles of multi-body dynamics and mixed lubrication,we considered the effect of temperature on lubricating oil and the resulting tribological and dynamic characteristics of the crosshead slipper and piston skirt.We compared the simulation results at the working temperature with those of the cold state.The results show that there is less friction loss in the crosshead slipper and piston skirt at the working temperature,but the secondary motion is increased.This increased secondary motion significantly decreases the minimum thickness of the oil film of the crosshead slipper on the main thrust side behind the top dead center.

关 键 词：十字头滑块 活塞裙 粘温效应 混合润滑 摩擦学 动力学 二阶运动 数值模拟 船用低速柴油机 

分 类 号：TK421.9[动力工程及工程热物理—动力机械及工程]