点接触弹流润滑入口凹陷的速度域  

Speed Scope of Inlet Dimple under Elastohydrodynamic Lubrication Point Contacts

作　　者：王学锋[1] 郭峰 胡如夫[1] 程晓民[1] WANG Xuefeng;GUO Feng;HU Rufu;CHENG Xiaomin(School of Mechanical Engineering,Ningbo University of Technology,Ningbo Zhejiang 315336,China;School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China)

机构地区：[1]宁波工程学院机械工程学院,浙江宁波315336 [2]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》2020年第11期41-45,51,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(51775286);浙江省自然科学基金项目(LY17E050007);宁波市自然科学基金项目(2018A610149).

摘　　要：利用等效黏度将circular流变模型整合进通用Reynolds方程,获得点接触弹流润滑入口凹陷的控制方程。采用多重网格法及多重网格积分法进行数值求解,研究卷吸速度变化导致的入口凹陷变化过程,讨论载荷、黏度、黏压系数、钢球半径及弹性模量对入口凹陷速度域的影响。结果表明:随着卷吸速度的增大,入口凹陷深度从0增大到最大值,然后再减小到0;入口凹陷出现的卷吸速度随着载荷、黏度、黏压系数及弹性模量的增大而减小,随着钢球半径的增大而增大;入口凹陷消失的卷吸速度及入口凹陷的速度域都随着载荷及钢球半径的增大而增大,随着黏度、黏压系数及弹性模量的增大而减小。Circular model was incorporated into generalized Reynolds equation by effective viscosity and then governing equations of inlet dimple under elastohydrodynamic lubrication point contacts were established.Numerical simulation was finished by using multi-level method as well as multilevel multi-integration method.The variation of the inlet dimple subjected to the entrainment velocity was investigated and the effects of the applied load,the viscosity,the viscosity-pressure coefficient,the radius of the steel ball as well as the elastic modulus on the speed scope of the inlet dimple were further discussed.The gained conclusions are listed as follows.The dimple depth clearly experiences an increase from zero to its maximum value and then a decrease to zero with the increase of the entrainment velocity.The entrainment velocity corresponding to the appearance of the inlet dimple is decreased with the increase of the applied load,the viscosity,the viscosity-pressure coefficient as well as the elastic modulus while it is increased with the increase of the radius of the steel ball.The entrainment velocity corresponding to the disappearance of the inlet dimple as well as the speed scope of the inlet dimple is increased with the increase of the applied load as well as the radius of the steel ball while they are decreased with the increase of the viscosity,the viscosity-pressure coefficient as well as the elastic modulus.

关 键 词：点接触 速度域 弹流润滑 入口凹陷 

分 类 号：TH117.2[机械工程—机械设计及理论]