Patent ID: 6758477
Filing Date: 2004-07-06
Classification: F01D,F05D,F16J

Abstract:
A gas turbine engine aspirating face seal comprising:a rotatable engine member and a non-rotatable engine member and a leakage path therebetween, an annular generally planar non-rotatable gas bearing face surface operably associated with said non-rotatable engine member, an annular generally planar rotatable gas bearing face surface operably associated with said rotatable engine member, said non-rotatable and rotatable gas bearing face surfaces being circumscribed about and generally perpendicular to a centerline axis, a substantially fully annular pull off biasing means operably disposed for urging said non-rotatable gas bearing face surface axially away from said rotatable gas bearing face surface and circumscribed about said centerline axis, and said pull off biasing means including at least one wave spring or one belleville washer circumscribed about said centerline axis.