Seal arrangement in a machine

Details Seal arrangement in a machine Seal arrangement in a machine

2007-03-20

2007-03-20

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Resilient, flexible, or resiliently biased

C415S178000, C415S231000

Reexamination Certificate

active

11011937

ABSTRACT:
A seal arrangement, for example a brush seal8′ in a gas turbine engine, includes thermal matching means for matching the rates of response of a supporting ring14′, 16′of the seal, and of a rotatable component4with which the seal cooperates, to thermal changes in the environment of the seal induced by changes in operating conditions. The thermal matching means may comprise a slugging mass24and/or thermal insulation28.Alternatively, or in addition, the region24of the housing at which the seal8′ is mounted may be made from a relatively low thermal expansion material. These measures reduce the rate of expansion and contraction of the seal8′ as the temperature in the engine varies so as to match more closely the rate of expansion and contraction of a rotatable component with which the seal cooperates.

REFERENCES:
patent: 3146992 (1964-09-01), Farrell
patent: 4425079 (1984-01-01), Speak et al.
patent: 4971336 (1990-11-01), Ferguson
patent: 6435514 (2002-08-01), Aksit et al.
patent: 6896482 (2005-05-01), Parry
patent: 0 950 798 (1999-10-01), None
patent: 2 081 392 (1982-02-01), None

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