Turbine flowpath seal

Details Turbine flowpath seal Turbine flowpath seal

1996-11-13

1998-08-25

Kwon, John T.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Resilient, flexible, or resiliently biased

415231, F04D 2908

Patent

active

057977232

ABSTRACT:
A turbine seal includes a first arcuate segment defining a flowpath boundary between combustion gases and air, and includes a radially outwardly extending rail at one end thereof. A second arcuate segment is disposed coaxially with the first segment for defining a continuation of the flowpath boundary, and has a radially extending face adjoining the rail. A leaf seal bridges the rail and the face for sealing leakage therebetween, and a plurality of pins extend through the leaf seal for providing mounting to the rail. Each pin includes a head and an opposite tip, with the pins being fixedly joined to the rail solely about the pin tips for freely supporting the pin heads in a cantilever without obstruction therearound for eliminating supporting tabs. A leaf spring is mounted on the pins between the heads and the leaf seal to pre-load the leaf seal against the rail and face to effect the sealing therebetween.

REFERENCES:
patent: 4897021 (1990-01-01), Chaplin et al.
patent: 5118120 (1992-06-01), Drerup et al.
patent: 5188507 (1993-02-01), Sweeney
patent: 5201846 (1993-04-01), Sweeney
General Electric Company, "CMF56-5C HPT Improved AFT Outer Band Sealing," two drawing figure excerpts, in production service more than one year.

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