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Title: Active bypass flow control for a seal in a gas turbine engine

An active bypass flow control system for controlling bypass compressed air based upon leakage flow of compressed air flowing past an outer balance seal between a stator and rotor of a first stage of a gas turbine in a gas turbine engine is disclosed. The active bypass flow control system is an adjustable system in which one or more metering devices may be used to control the flow of bypass compressed air as the flow of compressed air past the outer balance seal changes over time as the outer balance seal between the rim cavity and the cooling cavity wears. In at least one embodiment, the metering device may include a valve formed from one or more pins movable between open and closed positions in which the one pin at least partially bisects the bypass channel to regulate flow.
Inventors:
;
Issue Date:
OSTI Identifier:
1338923
Assignee:
SIEMENS ENERGY, INC. (Orlando, FL) NETL
Patent Number(s):
9,540,945
Application Number:
14/192,974
Contract Number:
FC26-05NT42644
Resource Relation:
Patent File Date: 2014 Feb 28
Research Org:
SIEMENS ENERGY, INC. Orlando, FL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS

Other works cited in this record:

Device for regulating turbine blade tip clearance
patent, August 1976

Air separator for gas turbines
patent, November 2000

Bolted joint for rotor disks and method of reducing thermal gradients therein
patent, August 2002

Heat energy dissipation device for a flywheel energy storage system (FESS), an FESS with such a dissipation device and methods for dissipating heat energy
patent, January 2004

Internal combustion engine provided with decompressing mechanisms
patent, November 2004

Passive thermostatic bypass flow control for a brush seal application
patent, November 2008

Box rim cavity for a gas turbine engine
patent, June 2009

Insulated turbine disc of a turbo-pump
patent, July 2010

Triple acting radial seal
patent, March 2012

Turbine inter-stage seal control
patent, August 2012

Gas turbine sealing apparatus
patent, February 2013

Particle separator in a gas turbine engine
patent, November 2013

Cooling fluid pre-swirl assembly for a gas turbine engine
patent, November 2013

Cooling fluid metering structure in a gas turbine engine
patent, December 2013

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