Elastohydrodynamic lubrication and elastohydrodynamic seal of mechanical seal-
Elastohydrodynamic lubrication and elastohydrodynamic seal of mechanical seal:
Silicon carbide mechanical seal elastic hydrodynamic lubrication, referred to as elastohydrodynamic lubrication (EHL or EHD), is to study the problem of hydrodynamic lubrication between elasticity in the contact between business and vice. Elastic fluid lubrication has two characteristics: ①Considering the influence of elastic deformation at the contact on the lubrication; ②Considering the influence of the viscosity of the lubricating oil with the pressure and temperature changes on the lubrication.
Broadly speaking, all lubrication problems with surface elastic deformation and minimum liquid film thickness at the same order of magnitude are elasto-hydrodynamic problems. The two friction surfaces are completely separated by the elastohydrodynamic lubrication of the lubricating liquid film, which is called the full-film elastohydrodynamic problem, also called thick-film lubrication. At this time, the surface roughness has little effect on lubrication. When the liquid film is thin so that some micro peaks on the friction surface are in contact with each other, it is called force partial film elastohydrodynamic lubrication, referred to as partial elastohydrodynamic lubrication, or thin film lubrication. At this time, part of the external load is borne by the liquid film, and the other part The load is borne by the peak of the surface asperity. If the temperature of the contact area is regarded as an isothermal field, it is called isothermal elastohydrodynamic lubrication, and conversely, if the temperature field is considered, it is called thermal elastohydrodynamic lubrication. 444.html,
Comparison of the fluid film models of three hydrostatic seals of mechanical seals The transformation of mechanical seal geometry