DEVELOPMENT OF SELF-ACTING SEALS FOR HELICOPTER ENGINES

摘要

An experimental evaluation of a NASA-designed self-acting face seal for use in advanced gas turbine main shaft positions was conducted The seal incorporated Rayleigh step pads (self-acting geometry) for lift augmentation.nSatisfactory performance of the gas film seal was demonstrated in a 500-hour endurance test at speeds to 183 m/s (600 ft/sec, 54,000 rpm) and air pressure differential of 137 N/cm2 (198.7 psi). Carbon wear was minor