加载条件下零卷吸凹陷油膜分布的试验研究  

Experimental Study on the Dimpled Oil Film Distribution under Zero Entrainment Velocity Motion in a Loading Process

作　　者：谢伟东 张锐[1] 韩一鸣 王静 XIE Weidong;ZHANG Rui;HAN Yiming;WANG Jing(College of Mechanical Engineering,Donghua University,Shanghai 201620,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Physics,Chinese Academy of Sciences,Lanzhou Gansu 730000,China)

机构地区：[1]东华大学机械工程学院,上海201620 [2]中国科学院兰州化学物理研究所,固体润滑国家重点实验室,甘肃兰州730000

出　　处：《润滑与密封》2023年第2期62-69,82,共9页Lubrication Engineering

基　　金：上海市科委外专项目(21WZ2501400);国家自然科学基金项目(51875298)。

摘　　要：为探究加载过程中零卷吸工况下油膜的变化情况,使用球-盘光干涉试验机进行PAO100润滑油润滑下的摩擦实验。实验过程中通过伺服电机驱动钢球和蓝宝石盘以等值反向速度稳定转动,同时匀速加载;采用工业相机拍摄球-盘之间的油膜图像,实验后使用双光干涉法测量接触区中截面油膜厚度。实验发现:在加载情况下,当表面速度较低时且载荷较小条件下,油膜规律性不强,只有当载荷增加到一定程度,“温度-黏度楔”效应才会起作用,形成中央凹陷油膜;中央凹陷出现的时间随着表面速度的增加而提前;在速度较高条件下,中央小凹陷会迅速演化为大凹陷;与稳态结果的对比显示,时变效应会延迟“温度-黏度楔”效应的作用。In order to explore the change of elastohydrodynamic lubrication(EHL)oil film under zero entrainment velocity(ZEV)in a loading process,friction experiment with PAO100 lubricating oil was carried out using a ball-disk optical interference testing rig.During the experiment,the servo motor drives the steel ball and sapphire disc to rotate reversely at equal speed,and the contact was loaded linearly.The oil film images between the ball and disk were captured by an industrial camera,and the oil film thickness at the middle section of the contact in the entraining direction after the experiment was measured by a dichromatic interference intensity modulation(DIIM)software.The results show that the regularity of oil film is not strong when the surface speed is relatively low and the load is relatively small under the loading condition.Only when the load increases to a certain value,the“temperature-viscosity wedge”effect starts to play a role and a centralized dimple is formed.The occurrence of the centralized dimple becomes earlier when the surface speed is increased.Under the condition of higher speed,the small centralized dimple rapidly evolves into a large dimple.The comparison with the steady-state results shows that the transient effect holds back the effect of“temperature-viscosity wedge”.

关 键 词：零卷吸速度 加载 弹流润滑 凹陷油膜 温度-黏度楔 

分 类 号：TH117.2[机械工程—机械设计及理论]