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Abstract
The analysis and design of a 50-mm diameter floating-ring helium buffer seal are described. The seal rings incorporated Rayleigh-step lift pads to provide hydrodynamic forces to separate the rings from the shaft. Maximum surface speed is 183 mls (600 fps) and maximum buffer gas pressure is 1389 kPa (200 psia).
An operating range map was computed as a function of speed and pressure. Contradictory problem arise due to excessive friction preventing ring tracking at low-speed, high-pressure conditions and insufficient friction to retard inertia driven motions at high-speed, low-pressure conditions. Steady-state and dynamic analyses and performance are described, as well as the results of thermal studies.
Presented as an American Society Of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in Hartford, Connecticut, October 18–20, 1983
Notes
Presented as an American Society Of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in Hartford, Connecticut, October 18–20, 1983