Abstract:The finite element analysis of Tsliding ring combined seal was carried out by ANSYS software,and its twodimensional axisymmetric finite element model was established. The sealing structure was divided into four sealing zones to study the effects of medium pressure,seal clearance,friction coefficient and the angle φ between the inclined edge of Ttype slip ring and the vertical line on sealing performance under static and dynamic seal state.The simulation results show that Tsliding ring combined seal can meet the static and dynamic sealing requirements under the pressure range studied.The maximum Von Mises stress and maximum contact stress are increased with the increasing of the medium pressure and decreased with the increasing of the sealing clearance,and the sealing performance is better when the seal clearance is less than 03 mm.The maximum Von Mises stress and maximum contact stress are increased with the increasing of angle φ,when φ is between 25° and 75°,the combined seal can meet the sealing requirements and the slip ring is not easy to be worn.The smaller the friction coefficient,the better the performance of dynamic seal of the combined seal.