Sealing arrangement
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United States of America Patent
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Jul 28, 2015
Grant Date -
Feb 7, 2013
app pub date -
Jun 28, 2012
filing date -
Jul 6, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A sealing arrangement, for example for providing an intershaft seal between shafts of a gas turbine engine, includes an air-riding sealing ring disposed between runners. A buffer fluid, such as air, is conveyed to a buffer cavity through a passage in the sealing ring. The buffer air provides a positive pressure drop along fluid-riding gaps, preventing leakage across the sealing arrangement. The sealing ring may be a split carbon ring, and measures may be provided to minimize leakage of buffer air at the split.
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