织构化活塞环/缸套的瞬态热流体动力润滑分析  

Transient Thermal Hydrodynamic Lubrication Analysis of Textured Piston Ring/Cylinder Liner

作　　者：周龙 王斌[2] 常秋英[2] 蔡礼港 ZHOU Long;WANG Bin;CHANG Qiuying;CAI Ligang(State Key Laboratory of Engine Reliability,Weifang Shandong 261061,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]内燃机可靠性国家重点实验室,山东潍坊261061 [2]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《润滑与密封》2018年第11期65-69,共5页Lubrication Engineering

基　　金：内燃机可靠性国家重点实验室基金项目(2016-35)

摘　　要：考虑温升对活塞环/缸套流体动力润滑的影响,联立广义Reynolds方程、膜厚方程、载荷方程、能量方程及热传导方程,建立织构化活塞环/缸套的瞬态热流体动力润滑模型;采用多重网格法和逐列扫描法进行求解,探究织构参数对热流体润滑的影响。结果表明:摩擦引起的温度升高使得最小油膜厚度和最大油膜压力变化趋势及大小均发生显著的变化,这表明在对该摩擦副进行动力润滑分析时必须考虑温升的影响;织构面密度和深度对最小油膜厚度、最大油膜压力及最大油膜温度随曲柄转角的变化趋势没有明显的影响,但对它们的值的大小产生不可忽略的影响,其中在做功冲程,小织构面密度和织构深度对应较小的最小油膜厚度和最大油膜温度,较大的最小油膜厚度。研究表明:在一定范围内,小的织构面密度和织构深度具有更优的燃油经济性,反之则具有更优的润滑可靠性。Considering the influence of temperature rise during the process of flietion on the hydrodynamic lubrication of piston ring/cylinder liner, a transient thermal hydrodynamic lubrication （TTHL） model was developed combined with Reynolds equation, film thickness equation, radial force equation, energy equation of oil film as well as heat flux continuity equation. Multi-grid method and column by column scanning method were used for the calculation of pressure and temperature,respectively,and the efleets of texture parameters on the TTHL were investigated.The results show that the temperature rise caused by friction has a obvious effect on the minimum oil fihn thickness and the maximum oil film pressure,indicating that the influence of temperature rise must be taken into account in the dynamic lubrication analysis of the piston ring/cylinder liner.The density and depth of textured surface have minor influence on the variation tendencies of the minimum oil film thickness,the maximum oil film pressure and the maximum oil film temperature, but a significant efleet on their values.During the process of work stroke,smaller textured surface density and depth correspond to smaller maximum oil film pressure and maximum oil film temperature,and larger minimum oil film thickness.The research shows that in a certain range,the smaller textured surface density and depth has better tirol economy, otherwise,it has better lubricating reliability.

关 键 词：活塞环 缸套 热流体动力润滑 表面织构 

分 类 号：TG156[金属学及工艺—热处理] TH117.2[金属学及工艺—金属学]