Aspirating face seal with axially biasing one piece annular spring

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 rotatable engine member being a rotor disk having turbine blades mounted on a rim thereof.

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
• wherein said rotatable engine member is a side plate mounted on a rotor disk and said non-rotatable gas bearing face surface is on a face seal ring mounted on a translatable cylindrical piston which is axially movable and supported by said non-rotatable engine member.

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,
• radially inner and outer tooth rings axially extending away from a first one of said gas bearing face surfaces across said leakage path and towards a second one of said gas bearing face surfaces, and
• an annular plenum located between said inner and outer tooth rings and a portion of said first gas bearing face surface between said inner and outer tooth rings.

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
• a primary restrictor darn radially spaced apart from said non-rotatable gas bearing face surface by an annular vent channel.