润滑的状态转化

报道了薄膜润滑的本质以及它与弹流润滑和边界润滑间关系的研究结果。根据各种特性膜厚度的变化分析了各润滑状态之间的转化关系，提出了润滑状态与宏观摩擦副所处状态关联与区分准则。

ON THE TRANSITION OF LUBRICATION REGIMES

It is found that the critical transition film thicknesses from elasohydrodynamic lubrication (EHL) to the thin film lubrication (TFL) and from the thin film lubrication to the boundary lubrication (BL) are related to the initial viscosity of lubricant, surface energy of substrates, etc.. In order to complete lubrication theory system, a lubrication model is proposed in this paper. In the model, three basic films, i.e. the dynamic film, the ordered lubricant film and static film, are proposed to represent the hydrodynamic lubrication, thin film lubrication and boundary lubrication. According to the division, we can tell different regimes from the friction of each basic film in the whole film. Since these basic films have their thickness region, the transitions between EHL, TFL and BL can be determined when the molecular structure of a lubricant is known.