Abstract: A segmented seal for a rotating member such as a shaft of a gas turbine engine. The seal includes a housing disposed about the shaft which housing receives a seal member formed from a suitable material such as carbon or ceramic having a bore receiving a shaft defining a shaft interface. The seal is axially restrained within the housing. A thermal control member extends annularly around the shaft and engages a surface of the seal. The thermal control member has a coefficient of expansion greater than that of the seal so that upon heating, the thermal control member will exert a force on the seal to lift the seal from the shaft so that the seal is self-adjusting to accommodate varying operating speeds and temperatures.

Abstract: A self aligning ring seal for sealing a rotating member such as a shaft of a gas turbine relative to the housing. The ring seal includes a housing retaining a static, resilient seal. A seal plate engages the resilient seal and the seal plate has a curved peripheral edge which permits movement of the seal plate relative to the housing. An annular ring seal assembly extends about the shaft preferably of a carbon or other temperature-resistant material held in compression by an outer compressing ring. The ring seal assembly has a sealing face engaging the seal plate. In the event of shaft misalignment, the sealing faces of the seal plate and ring seal assembly remain in substantially full sealing contact with the misalignment being translated to the static seal.