Abstract: A seal assembly includes a plurality of arcuate seal bodies spaced about a central axis and coupled to form an annular seal disposeable within a housing first chamber. Each seal body has an inner circumferential sealing surface for sealingly against a rotatable member outer surface and an axial end having a radial sealing surface sealingly engageable with a housing radial surface to separate the first chamber and a second housing chamber. One or more lift ramps extend outwardly from the body inner surface and generate an outwardly directed force on the seal body when the inner member rotates within the seal. An elongated projection extends axially from the body end, has radially inner and outer surfaces, and is disposeable within the housing second chamber. The projection outer surface is exposable to fluid pressure within the second chamber to generate a pressure differential between the projection inner and outer surfaces.

Abstract: A seal assembly includes a plurality of arcuate seal bodies spaced about a central axis and coupled to form an annular seal disposeable within a housing first chamber. Each seal body has an inner circumferential sealing surface for sealingly against a rotatable member outer surface and an axial end having a radial sealing surface sealingly engageable with a housing radial surface to separate the first chamber and a second housing chamber. One or more lift ramps extend outwardly from the body inner surface and generate an outwardly directed force on the seal body when the inner member rotates within the seal. An elongated projection extends axially from the body end, has radially inner and outer surfaces, and is disposeable within the housing second chamber. The projection outer surface is exposable to fluid pressure within the second chamber to generate a pressure differential between the projection inner and outer surfaces.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.