微液滴面接触润滑研究

Research on Micro-droplet Lubrication in an Conformal Contact

利用面接触润滑油膜测量系统进行微量液滴润滑性能的研究。试验中以静止的微型滑块平面和旋转的光学透明圆盘构成润滑副,对不同黏度的润滑油分别进行微液滴以及玻璃盘全部铺满情况下的油膜厚度测量。试验结果表明:微量润滑液滴会沿滑块的运动轨迹铺展在玻璃盘上,形成持续的润滑,表明微量的润滑介质液滴可以提供充分润滑;油膜厚度开始会随速度的增加而增加,到达一定速度后油膜厚度会保持不变;干涉图说明微量润滑下,接触区并不是完全由润滑膜承载,会有一些油气混合物承载。

The lubrication property of micro-droplet was researched by using an oil film thickness measuring system of conformal contact. In the experiments,the lubricated contact was composed of stationary micro-slider plane and rotating transparent glass disc,the film thickness of the lubricants with different viscosity was measured under micro-droplet lubrication and fully flooded lubrication. The experimental results show that a droplet of lubricant can be spread on the running track by the rotating disc,and continuous lubrication is then generated,indicating a small quantity of lubricant of microdroplet can supply sufficient lubrication. The film thickness is increased with the increasing of speeds at first and then remains nearly constant when a certain speed is reached. The interferograms show when only a small quantity of lubricant supplied,the contact is not completely supported by lubricant film,and some air and lubricant mixture film appears and may bear some load.