Abstract:The axisymmetric finite element model of Yx-ring used in reciprocating dynamic seals was set up in ABAQUS, and the seal performance and mechanical properties under different conditions were analyzed.The results show that the size of the Von Mises stress and the biggest contact stress on the primary seal face is fluctuated over time and the acting position is changed with the direction of movement.The average frictional force on main contact surface has a linear relationship with medium pressure, friction coefficient, sealing gap and seems not change with velocity, but the biggest frictional force shows a non linear characteristic with themThe shear stress is hardly affected by speed at 0.05m/s to 0.35m/s.The shear stress in draw in stroke is greatly impacted by medium pressure, friction coefficient and sealing gapThe outer journey plays a major role in process of the ring failure.The contact surface of Yx ring with shaft, the ring groove, the inner lip and roots are the parts of Yx-ring easily damaged.The simulation conclusions are verified by the practical failure characteristics of the seals.