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Title: Turbine interstage seal with self-balancing capability

Abstract

An interstage seal for a turbine of a gas turbine engine, the interstage seal having a seal carrier with an axial extending seal tooth movable with a stator of the engine, and a rotor with a seal surface that forms the interstage seal with the seal tooth, where a magnetic force produced by two magnets and a gas force produced by a gas pressure acting on the seal carrier forms a balancing force to maintain a close clearance of the seal without the seal tooth contacting the rotor seal surfaces during engine operation. In other embodiments, two pairs of magnets produce first and second magnetic forces that balance the seal in the engine.

Inventors:
; ;
Issue Date:
Research Org.:
FLORIDA TURBINE TECHNOLOGIES, INC., Jupiter, FL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1399246
Patent Number(s):
9771821
Application Number:
14/739,536
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
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
DOE Contract Number:  
SC0008218
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Jun 15
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Mills, Jacob A, Jones, Russell B, and Sexton, Thomas D. Turbine interstage seal with self-balancing capability. United States: N. p., 2017. Web.
Mills, Jacob A, Jones, Russell B, & Sexton, Thomas D. Turbine interstage seal with self-balancing capability. United States.
Mills, Jacob A, Jones, Russell B, and Sexton, Thomas D. Tue . "Turbine interstage seal with self-balancing capability". United States. https://www.osti.gov/servlets/purl/1399246.
@article{osti_1399246,
title = {Turbine interstage seal with self-balancing capability},
author = {Mills, Jacob A and Jones, Russell B and Sexton, Thomas D},
abstractNote = {An interstage seal for a turbine of a gas turbine engine, the interstage seal having a seal carrier with an axial extending seal tooth movable with a stator of the engine, and a rotor with a seal surface that forms the interstage seal with the seal tooth, where a magnetic force produced by two magnets and a gas force produced by a gas pressure acting on the seal carrier forms a balancing force to maintain a close clearance of the seal without the seal tooth contacting the rotor seal surfaces during engine operation. In other embodiments, two pairs of magnets produce first and second magnetic forces that balance the seal in the engine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {9}
}

Works referenced in this record:

Shaft seal with positively magnetically controlled sealing gap
patent, May 1984


Permanent magnet floating shaft seal
patent, August 1992


Magnetic seal
patent, November 1992


Seal arrangement
patent, April 2001


Seal apparatus
patent, July 2007


Magnetically-controlled rotary seal
patent, October 2011


System and method for clearance control
patent, May 2012


Airtight magnetic seal for bearing casings
patent, June 2012


Pump with magnetic bearings
patent, April 2014


Seal apparatus
patent-application, May 2002


Sealing arrangements
patent-application, February 2017