| 摘要 |
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.
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