摘要
为探究润滑油在外部加热条件下的润滑能力以及油膜形态的变化情况,采用玻璃盘和金属旋转轴组成存在一定温差的摩擦副系统,搭建了使用激光位移传感器进行油膜厚度测量的可视化试验装置。通过观测不同参数影响下的油膜形态以及摩擦力大小发现,润滑油温度、转速等参数对于润滑油膜的形成及摩擦力有着重要的影响:当润滑油温度升高时,油膜厚度降低,摩擦力急剧增加;当转速增大时,油膜厚度增大,摩擦力减小,但是若转速持续增大,油膜厚度会逐渐趋于一个最大值,摩擦力的减小趋势减缓,甚至最后略有增加。应用这一实验系统,还可拍摄油膜气穴,气穴形态与文献所示非常相似。
Effective lubrication can significantly reduce the energy loss and increase the service life of machines,which has been considered as one of the most important contents in tribology study.In order to explore the lubricating characteristics of lubrication oil and the oil film shape changes under complicated thermal environments,a friction pair system composed of a glass disk and a metal rotating shaft with a certain temperature difference was formed,and a visualized experimental system was set up using a laser displacement sensor to measure the oil film thickness.By observing the film shape and measuring the friction force with different parameters,it was concluded that the rotating speeds and lubricating oil temperature affected not only the formation of lubricating oil film but also the friction force significantly.When the oil temperature raised,the oil film thickness decreased accordingly,and the friction force rapidly increased.When the rotation speed increased,the oil film thickness increased and the friction decreased at the beginning.But if the rotating speed continued to increase,the thickness of the oil film would increase until it reached a maximum,and the decreasing trend in friction would slow down,and it even slightly increased at the end.In addition,the cavitation development in lubrication oil film was photographed in this experiment,and the form of cavitation was very similar to that shown in the literature.
作者
李云强
陈卓烈
许成
张鹏伟
吴斌
邢嘉琦
黄钰期
LI Yunqiang;CHEN Zhuolie;XU Cheng;ZHANG Pengwei;WU Bin;XING Jiaqi;HUANG Yuqi(Weichai Holding Group Co.,Ltd.,Weifang 261001,China;Power Machinery and Vehicular Engineering Institute,College of Energy Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2020年第6期559-564,共6页
Engineering Journal of Wuhan University
基金
潍柴内燃机可靠性国家重点实验室开放课题(编号:skler-201606)
国家自然科学基金青年基金项目(编号:51206141)。
关键词
润滑
油膜厚度
旋转实验台
激光位移传感器
光干涉法
可视化
lubrication
thickness of oil film
rotating experiment table
laser displacement sensor
optical interference
visualization
