摘要
为研究润滑油微液滴润滑机制,采用多光束干涉技术对球-盘静态接触下润滑油微液滴的铺展流动现象进行实验观察。结果表明:在球-盘接触构成的微间隙周围毛细力诱导微液滴铺展流动,微液滴铺展速度随液滴体积的增大而增大,随液滴黏度的增大而减小;润滑油微液滴在高表面能界面上具有较大的铺展速度;当润滑油的表面张力较小时,液滴的初始铺展半径变大,铺展距离明显减小,且产生二次铺展现象。
By using multi-beam optical interferometry,the spreading flow phenomenon of a micro-oil droplet closed to a static ball-on-disc contact region was observed experimentally in order to study the lubrication mechanism of micro-oil droplets.The results show that the micro-oil droplet spreading around the ball-on-disc contact rim is due to capillary force. The spreading velocity is increased with the increasing of micro-oil droplet volume, whereas decreased with the increasing of oil viscosity. Moreover, the spreading velocity of micro-oil droplets is quite large on the high energy contact surface. When the surface tension of lubrication oil is quite small,the primary radius of oil droplets spreading is getting bigger,the dis- tance of spreading is obviously reduced, and the phenomenon of second time of spreading is produced.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第6期36-39,共4页
Lubrication Engineering
基金
国家重点基础研究发展规划项目(973)(2011CB706602)
教育部博士点基金项目(20133721110002)
关键词
微液滴
静态接触
毛细力
铺展速度
micro-droplet
static contact
capillary force
spreading velocity
