运行温度对钢-POM齿轮副热弹流润滑性能的影响  

Effect of the operating temperature on thermal EHL performance of steel-POM gears

作　　者：周家傲 刘晓玲 张政 李群 ZHOU Jia'ao;LIU Xiaoling;ZHANG Zheng;LI Qun(School of Mechanical&Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,青岛266520

出　　处：《机械传动》2025年第4期8-15,共8页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(51475250)。

摘　　要：【目的】温度影响聚合物齿轮的弹性模量,继而会影响齿轮弹流性能。因此,有必要研究温度对聚合物齿轮润滑性能的影响。【方法】考虑聚甲醛(Polyformaldehyde,POM)齿轮的弹性模量随温度的变化,建立了钢-POM齿轮副的热弹流润滑模型;使用多重网格技术和逐列扫描技术,研究并讨论了不同运行温度下钢-POM齿轮副的热弹流润滑性能。【结果】结果表明,钢-POM齿轮副的摩擦因数在节点之前下降,节点之后上升;钢-POM齿轮副的油膜最大温度靠近聚合物齿轮;入口区黏度对油膜厚度影响较大,弹性模量是影响油膜压力的主要因素;油膜温度受环境黏度影响较大,弹性模量引起的油膜压力变化影响较小;随着运行温度的升高,摩擦因数减小。[Objective] The temperature significantly influences the elastic modulus of polymer gears,which consequently affects their elastohydrodynamic lubrication performance.It is therefore imperative to investigate the impact of temperature on the lubrication characteristics of polymer gears.[Methods] A thermal elastohydrodynamic lubrication(TEHL) model for steel-POM gear pairs was developed,incorporating temperature-dependent variations in the elastic modulus of polyformaldehyde(POM) gears.The multigrid technique and the column scanning method were employed to systematically analyze and discuss the TEHL performance of steel-POM gear pairs under diverse operating temperatures.[Results] The results show that the friction coefficient of the steel-POM gear decreases forward of the pitch point and increases afterward of the pitch point.The maximum temperature of the oil film of the steel-POM gear is near the polymer gear.The inlet viscosity has a great influence on the oil film thickness,and the elastic modulus is the major factor for the oil film pressure.The oil film temperature is greatly determined by the environmental viscosity,and the oil film pressure caused by the elastic modulus has little effect.As the operating temperature increases,the friction coefficient decreases.

关 键 词：弹流润滑 聚甲醛齿轮 运行温度 弹性模量 环境黏度 

分 类 号：TH117.2[机械工程—机械设计及理论]