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Title: 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.
Inventors:
;
Issue Date:
OSTI Identifier:
1375225
Assignee:
Florida Turbine Technologies, Inc. CHO
Patent Number(s):
9,732,621
Application Number:
14/548,492
Contract Number:
SC0008218
Resource Relation:
Patent File Date: 2014 Nov 20
Research Org:
Florida Turbine Technologies, Inc., Jupiter, FL(United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS