Study Of Flow Field And Deformation About Friction Pair Of Circular Groove Mechanical Seal

Mechanical seal as the fluid mechanical and dynamic mechanical sealing device, under the complicated working condition, easy to cause friction pair liquid film evaporation and sealing ring, cracking and thermal deformation of abnormal wear, the seals as soon as the deformation will lead to the increase of the leakage and friction pair of end face and local stress concentration, so that the sealing ring local excessive wear and high temperature, affect the sealing performance of the seal face. Fluid lubrication of non-contact mechanical seal, with its wear small, long service life, the advantages of resistance to deformation ability obtained the very good application. Circular trough type mechanical seal within this article as the object, in this kind of non-contact mechanical seal liquid film flow field characteristics and heat flow and solid coupling deformation are analyzed and studied.With the inner circular groove hydrodynamic model for the study of mechanical seals, the 3D model of the face fluid-film was established, computational fluid dynamics theory and finite volume method was used for the simulation and numerical analysis of flow field characteristics of fluid-film and sealing performance. And then within the liquid film flow field characteristic of circular groove mechanical seal analysis as the foundation, combined with circular arc groove mechanical seal friction pair, by using the theory of computational fluid dynamics and heat flow and solid coupling analysis method of temperature field and thermal deformation of mechanical seal friction pair are simulated and analyzed. Mechanical seal ring is studied the changing rule of the temperature and thermal stress and thermal strain, the seal ring under the coupling action of temperature load and power load deformation, and studies the material coefficient of thermal conductivity and thermal expansion coefficient on the thermal deformation of seal ring.