Study On Deformation Computation And Control Of Curved Shallow Groove Mechanical Seal At High Duty

Mechanical face seal is one of the most important components in the rotating machines, and it is used widely in the conditions of controlling leakage. Along with the rapid development of the industry, the operating conditions of seal tend to high temperature, high pressure and high speed, so its failure is unavoidable. Deformation of seal face is one of the most important factors among the reasons which bring seal's failure. During operating of curved shallow groove mechanical seal at high pressure, some problems are aroused, especially the ones about the deformation due to thermal loads and mechanical loads. The deformation will cause the increase of leakage, spot and line contact until seal's failure. So the analysis on seal deformation is very significant.In this paper, steady state pressure field is computed using programs written in FORTRAN language based on finite element method, steady state temperature field, thermal deformation, structure deformation and coupled field deformation are computed using finite element software ANSYS10.0. Compared with the ordinary mechanical seal on temperature and face deformation at the same operating conditions, the curved shallow groove mechanical seal can reduce the temperature and deformation of seal face effectively, and it is superior to the ordinary mechanical seal. Further more, the effects of sealing pressure, shaft speed, flushing and material properties on temperature field and deformation are discussed. The variations of seal leakage and friction caused by deformation are analyzed. At the base of that, the measures of controlling deformation are presented. This thesis is useful for research, design and application of curved shallow groove mechanical seal.