基于齿形链销轴-链板接触副的热混合润滑分析  

Analysis of Thermal Mixed Lubrication Based on Silent Chain Pin Shaft-Chain Plate Contact Pair

作　　者：周亚林 刘晓玲 朱鹏娟 何文卓 刘国梁 ZHOU Yalin;LIU Xiaoling;ZHU Pengjuan;HE Wenzhuo;LIU Guoliang(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《润滑与密封》2023年第7期57-66,共10页Lubrication Engineering

基　　金：国家自然科学基金项目(51475250);青岛市博士后应用研究项目。

摘　　要：为研究齿形链销轴-链板副的混合润滑性能,分析齿形链中销轴-链板接触副的几何关系及其运动特性,基于平均流量模型,建立销轴-链板副的热混合润滑模型,讨论综合曲率半径、表面粗糙度及载荷对非牛顿热混合润滑的影响。结果表明:随着综合曲率半径的增加,膜厚比增加,润滑状态由混合润滑转变为全膜润滑状态,油膜压力增加,粗糙峰接触压力减小,摩擦因数与摩擦热均降低,有效地提升了销轴-链板副的润滑性能;由于销轴与链板孔径尺寸偏差的存在,导致综合曲率半径在一定范围内变化,故其对销轴-链板接触副润滑性能的影响是变化的;随着表面粗糙度或载荷的增加,膜厚比减小,摩擦热升高,润滑状态由全膜润滑转变为混合润滑,增加了销轴-链板副的磨损风险。In order to study the mixed lubrication performance of the pin-chain plate contact pair for the silent chain,the geometric relation and kinetic characteristics of the pin-chain plate contact pair were analyzed,and a thermal mixed lubrication model of a pin-chain plate contact pair was established based on the average flow model.Effects of equivalent curvature radius,surface roughness and load on the non-Newtonian thermal mixed lubrication performance were discussed.The results show that,with the increase in the equivalent curvature radius,the film thickness ratio increases,the lubrication state is changed from mixed lubrication to full film lubrication,the oil film pressure increases and the asperities contact pressure decreases,and the friction coefficient and friction thermal decrease.As a result,the lubrication performance of the pin-chain plate pair will improve.However,due to the diameter deviation between the pin shaft and the chain plate,the equivalent curvature radius varies in a certain range.Therefore,the influence on the lubrication performance of the pin-chain plate contact pair is random.With the increase of surface roughness and the load,the film thickness ratio decreases and friction thermal increases,the lubrication state changes from full film lubrication to mixed lubrication,which will cause wear risk of the pin-chain plate pair.

关 键 词：销轴-链板副 平均流量 热混合润滑 齿形链 

分 类 号：TH117.2[机械工程—机械设计及理论]