表面规则微凹腔半径对活塞环润滑性能的影响  

Influence of surface regular micro-pore radius on lubrication performance of piston ring

作　　者：符永宏[1] 季伟[1] 张华伟[1] 纪敬虎[1] 华希俊[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2010年第6期621-624,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省高技术重大项目(BG2007023);国家自然科学基金资助项目(50475122);中国博士后基金资助项目(20070420190)

摘　　要：以激光微造型活塞环表面为研究对象,建立表面具有规则微观抛物面凹腔结构的数学模型.利用变异多重网格法对该模型进行数值求解,得到活塞环-缸套间最小油膜厚度和无量纲平均摩擦力变化曲线,分析微凹腔半径对活塞环润滑性能的影响.分析结果表明:最小油膜厚度随微凹腔半径增大而明显变厚,无量纲平均摩擦力随微凹腔半径增大而减小,但在进排气冲程中,无量纲平均摩擦力的减小不明显;在压缩做功冲程中,无量纲平均摩擦力的减小显著,当凹腔半径rp从20μm变化到70μm时,无量纲平均摩擦力最多减小了68.7%.To study the surface of laser micro-texturing piston ring,a mathematical model was established for the piston ring with regular microstructure in the parabolic form.Through the numerical solution of the model by modified multi-grid method,the minimum film thickness and the graph of dimensionless average friction force between piston ring and cylinder liner were obtained,and the influence laws of micro-pore radius on the lubrication performance of piston ring were also analyzed.The results show that there is an apparent increase of film thickness and decrease of dimensionless average friction with the increase of micro-pore radius.However,in the intake and exhaust strokes,the dimensionless average friction decreases slightly;in the other two strokes,it decreases substantially.As pore radius rp increases from 20 μm to 70 μm,the dimensionless average friction decreases by 68.7% at most.

关 键 词：活塞环 激光微造型 微凹腔半径 变异多重网格法 润滑性能 

分 类 号：TH117[机械工程—机械设计及理论]