摘要
采用球-盘点接触光干涉油膜测量仪观察了不同钢球和盘表面速度夹角下脂润滑的油膜特性.试验发现,在表面速度异向条件下呈现出与已有定量脂润滑明显不同的两个特征:接触区入口油池的出现和油膜外形非对称性.其中入口油池的出现使油膜厚度和润滑持续时间得到显著提升,这一发现也证明将经典的乏油边界条件应用于速度异向工况具有局限性;油膜外形的非对称性主要由滑动分量诱发的接触区温度分布不均匀引起,而且非对称性随着速度和角度的增加而变得明显.表面速度异向条件下两表面上滚道交叉促进润滑剂回填,是入口油池形成的主要机制.
Using a ball-on-disc optical apparatus,the features of grease lubrication were experimentally investigated under different angles between the surface velocities of the two contact bodies.It was found that in the contacts with different surface velocities,there represented two typical features:inlet oil reservoir formation and asymmetrical film shape,which were different from traditional observations of grease lubrication.The film thickness and lubricating duration were significantly enhanced due to the presence of an inlet oil reservoir.Furthermore,this finding also indicated the incorrect use of classical inlet boundary conditions for numerical EHL with non-collinear surface velocities.The asymmetrical film shapes were mainly attributed to the non-uniform thermal properties of the sliding components.And moreover,asymmetrical films became pronounced under higher speeds and angles.The crossed lubrication tracks on two surfaces facilitated the lubricant replenishment,which was the main mechanism of inlet oil reservoir formation.
作者
周广运
栗心明
郭峰
张建军
王晓波
ZHOU Guangyun;LI Xinming;GUO Feng;ZHANG Jianjun;WANG Xiaobo(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China;Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Shandong Qingdao 266101,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2019年第5期635-642,共8页
Tribology
基金
国家自然科学基金项目(51875299,51775286)
中国博士后科学基金面上项目(2017M622296)资助~~
关键词
表面速度异向
定量脂润滑
入口油池
油膜非对称性
光干涉
different surface velocity directions
single-charging grease lubrication
inlet oil reservoir
asymmetrical film shape
interferometry
作者简介
Corresponding author.栗心明,E-mail:mexinmingli@163.com,Tel:+86-18660261702。
