Air riding seal with purge cavity
Abstract
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:
- Research Org.:
- Florida Turbine Technologies, Inc., Jupiter, FL(United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1375225
- Patent Number(s):
- 9732621
- Application Number:
- 14/548,492
- Assignee:
- Florida Turbine Technologies, Inc.
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- DOE Contract Number:
- SC0008218
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Nov 20
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS
Citation Formats
Sexton, Thomas D, and Mills, Jacob A. Air riding seal with purge cavity. United States: N. p., 2017.
Web.
Sexton, Thomas D, & Mills, Jacob A. Air riding seal with purge cavity. United States.
Sexton, Thomas D, and Mills, Jacob A. Tue .
"Air riding seal with purge cavity". United States. https://www.osti.gov/servlets/purl/1375225.
@article{osti_1375225,
title = {Air riding seal with purge cavity},
author = {Sexton, Thomas D and Mills, Jacob A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 15 00:00:00 EDT 2017},
month = {Tue Aug 15 00:00:00 EDT 2017}
}
Works referenced in this record:
Fluid-sealed shaft seal with bores for supplying and discharging fluid
patent, June 1985
- Albers, Rolf; Aschenbruck, Emil; Neuhaus, Gunter
- US Patent Document 4,523,764
Floating air seal for a turbine
patent, November 2011
- Aho, Jr., Wilho V.
- US Patent Document 8,066,473