抄録
This paper presents an analysis of a new noncontacting face seal with circumferential pumping grooves and shrouded Rayleigh-steps. The hydrodynamic lubricating film is maintained under rotation due to the Rayleigh-steps. If the low pressure side of the seal is filled with a fluid, the fluid can be pumped into the high pressure side through the circumferential pumping grooves until the shaft speed reaches a limit value. The experimental result confirms the theoretical prediction for the lubricating and sealing performances. Due to the high pumping ability in addition to the high stiffness of its hydrodynamic film, the seal can operate without wear and leakage for a high pressure fluid.
