Abstract:In order to accurately simulate the contact pressure of the sealing ring in the assembly process and the effect of fluid pressure on the sealing ring,the automatic shrink fit method of ABAQUS was used to simulate the contact static pressure of the sealing ring in the assembly process,the loading method of fluid pressure penetration was used to simulate the effect of fluid pressure on the sealing ring,and the effects of compression rate of Oring,the fluid pressure on the sealing performance of the tooth shape combined slip ring were studied.The results show that the automatic shrink fit method can effectively solve the problems of stress concentration and inaccurate calculation results of contact pressure in the assembly process by using displacement loading method,the loading method of fluid pressure penetration can find the critical point of contact and separation automatically and good convergent solution can be got under the high pressure fluid load,which effectively solve the problem that the calculation results are not accurate by boundary loading method.The calculation results show that the maximum Mises stress and maximum contact stress of the seal ring are increased with the increase of working medium pressure when the compression ratio of Oring exceeds a certain value,and the maximum contact stress meets the requirements of sealing.However,when the compression ratio is too low,the seal ring will produce large deformation under high medium pressure,which will cause great stress concentration and lead to the failure of seal.