Research On The Mechanism Of The Micro-Texture On The Face Of The Mechanical Seal

With the rapid development of modern industry,mechanical seal has been widely used in all kinds of fluid machinery and equipment.Due to mechanical seal in such aspects as safety,environmental protection,economy,energy conservation is of great significance,gradually developed into the key technology of some occasions,so many scholars at home and abroad study on sealing theory,technology and products.But about the interpretation of the sealing mechanism remains to be further perfect.In order to investigate the functional mechanism of face micro modelling in mechanical seals,the study analyzes the geometric composition of face micro modelling in friction pair surface,which uses the wedge space geometry with hydrodynamic effect as the pointcut.The analysis shows that the micro modelling in end-faces causes uneven geometrical morphology in friction pair surface,and forms hydrodynamic effect through differential pressure flow as well as shearing flow.Moreover,the surface micro geometric morphology is a type of special micro modelling.The analysis of the experimental results shows that the unevenness of surface micro geometric morphology is able to affect the hydrodynamic effect,and the surface micro geometric morphology by electrochemical finishing machining can thicken the lubricating film.The micro modelling of friction pair surface in mechanical seals not only possesses the functions of lubrication and sealing,but also has the effects of speed-type pumping as well as volume-type pumping.The thesis researches the effects of the unevenness,distribution density and shapes of surface micro modelling on the lubricant film thickness as well as stability,which will contribute to the further development of mechanical seals theory and technology.