Abstract: Sealing ring with wavy face is a kind of non-contact mechanical seal, which has advantages in low leakage, high stiffness and long life. It has a good application prospect in mechanical seal structure of nuclear reactor coolant pump and turbo machine. However, the manufacture of sealing ring with wavy face is a very challenging job due to the complex curve face. A pre-deformation plane lapping method of sealing ring with wavy face is proposed here, and the pre-deformation, which is the most critical process, is analyzed. The relationship between the pre-deformation force and the end face deformation of sealing ring is revealed through finite element analysis. It is found that the required surface deformation can be obtained by applying periodic reverse torque. Through the development of pre-deformation fixture and the research of lapping technology of ring surface, sealing ring with wavy face is successfully manufactured. The possibility of the manufacturing of sealing ring with wavy face using the pre-deformation plane lapping method is verified theoretically and experimentally.

Key words: finite element analysis, plane lapping, pre-deformation, sealing ring with wavy face