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Title: 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:
;
Publication Date:
Research Org.:
Florida Turbine Technologies, Inc., Jupiter, FL(United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1375225
Patent Number(s):
9,732,621
Application Number:
14/548,492
Assignee:
Florida Turbine Technologies, Inc. CHO
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. doi:. 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}
}

Patent:

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