关键词: 面接触, 流体动压润滑, 油膜厚度, 光干涉, 摩擦力

Abstract:

For the theoretical study of conformal contact lubrication,a traditional measuring system for thin lubrication film in a fixed-incline conformal contacts  was renovated for simultaneous measurement of lubricating oil film thickness and friction in a fixed-incline conformal contacts.The simultaneous measurement method added a degree of freedom to the slider under condition that the slider can be fixed to the needed dip angle relative to the disk.The present measuring system adopted a laser light source and an external coaxial illumination to expand the measurement range of the oil film and the view field of interferograms.A new software was designed to control the acceleration of the servo motor to avoid errors of the interference order recording and acquire more regular interference curves.This paper also presented some fundamentals of multiple beam interferometry principle in measuring the oil film thickness and analysed the resolution ratio of the film thickness and friction.Variation of film thickness and friction with sliding velocity was measured through the system and the results were contrast with the corresponding theories,
which demonstrated the credibility of tested data.At last,the load-carrying capacity of thin film lubrication in a fixed-incline conformal contact was studied with the test apparatus,
and was compared to the theory.Some preliminary analyses were given to account for the differences in the comparison.

Key words: conformal contact, hydrodynamic lubrication, film thickness, interferometry, friction