Boundary lubrication 边界润滑
边界润滑 Boundary Lubrication 润 滑
润滑状态 混合润滑 边界润滑(部分弹流润滑) 流体润滑 0+o =1~5 A>5 ≤1 润滑
2 润滑状态 润 滑 2 2 2 1 min + = h
边界润滑概念 边界(润滑)膜 (边界润滑焦点) 由于润滑剂分子与固体表面相互作用而形成的一层界面膜(<0.1m) 在摩擦过程起主要润滑作用的润滑状态。 Q 润滑
3 由于润滑剂分子与固体表面相互作用而形成的一层界面膜（< 0.1μm） 在摩擦过程起主要润滑作用的润滑状态。 边界润滑概念 边界（润滑）膜 （边界润滑焦点） 润 滑
Boundary lubrication is lubrication by a liquid under conditions where the solid surfaces are so close together that appreciable contact between opposing asperities is possible. The friction and wear in boundary lubrication are determined predominantly by interaction between the solids and between the solids and the liquid. The bulk flow properties of the liquid play little or no part in the friction and wear behavior a regime of lubrication where there is part contact between the metal components and partial v油膜厚度 separation of the surfaces by the lubricant fuid film 润滑
润 滑 4 “Boundary lubrication is lubrication by a liquid under conditions where the solid surfaces are so close together that appreciable contact between opposing asperities is possible. The friction and wear in boundary lubrication are determined predominantly by interaction between the solids and between the solids and the liquid. The bulk flow properties of the liquid play little or no part in the friction and wear behavior. ” A regime of lubrication where there is partial contact between the metal components and partial separation of the surfaces by the lubricant fluid film. 油膜厚度
clean(dry) surfaces Interfacial shear strength same as substrate material Contact stresses remain unaffected Surfaces with low interfacial shear stress Interfacial shear strength of the surface layer Small shear stress at interfaces Lubrication by a low shear strength layer formed at asperity peaks 润滑
润 滑 5