Title: Rim seal arrangement having pumping feature

Abstract

A rim seal arrangement for a gas turbine engine includes a first seal face on a rotor component, and a second seal face on a stationary annular rim centered about a rotation axis of the rotor component. The second seal face is spaced from the first seal face along an axial direction to define a seal gap. The seal gap is located between a radially outer hot gas path and a radially inner rotor cavity. The first seal face has a plurality of circumferentially spaced depressions, each having a depth in an axial direction and extending along a radial extent of the first seal face. The depressions influence flow in the seal gap such that during rotation of the rotor component, fluid in the seal gap is pumped in a radially outward direction to prevent ingestion of a gas path fluid from the hot gas path into the rotor cavity.

Inventors:

Lee, Ching-Pang; Myers, Caleb

Issue Date:

2017-04-25

Research Org.:

Siemens Energy, Inc. Orlando, FL (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1353070

Patent Number(s):

9631509

Application Number:

14/946,893

Assignee:

Siemens Energy, 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 F16 - ENGINEERING ELEMENTS AND UNITS F16J - PISTONS {

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F01D5/081 - {Cooling fluid being directed on the side of the rotor disc or at the roots of the blades

F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16J - PISTONS {

F16J15/44 - Free-space packings

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

F05D2260/60 - Fluid transfer
F05D2260/14 - Preswirling

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F01D11/04 - using sealing fluid, e.g. steam
F01D5/082 - {on the side of the rotor disc}

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

F05D2220/32 - in gas turbines
F05D2260/2212 - by creating turbulence

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F01D5/187 - {Convection cooling}
F01D9/04 - forming ring or sector

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DOE Contract Number:  

FC26-05NT42644

Resource Type:

Patent

Resource Relation:

Patent File Date: 2015 Nov 20

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING