Air riding seal with purge cavity
An air riding seal for a turbine in a gas turbine engine, where an annular piston is axial moveable within an annular piston chamber formed in a stator of the turbine and forms a seal with a surface on the rotor using pressurized air that forms a cushion in a pocket of the annular piston. A purge cavity is formed on the annular piston and is connected to a purge hole that extends through the annular piston to a lower pressure region around the annular piston or through the rotor to an opposite side. The annular piston is sealed also with inner and outer seals that can be a labyrinth seal to form an additional seal than the cushion of air in the pocket to prevent the face of the air riding seal from overheating.
- Research Organization:
- Florida Turbine Technologies, Inc., Jupiter, FL(United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- SC0008218
- Assignee:
- Florida Turbine Technologies, Inc.
- Patent Number(s):
- 9,732,621
- Application Number:
- 14/548,492
- OSTI ID:
- 1375225
- Country of Publication:
- United States
- Language:
- English
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