High temperature spring seals

Details High temperature spring seals High temperature spring seals

2004-11-04

2008-12-16

Patel, Vishal (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S647000

Reexamination Certificate

active

07464940

ABSTRACT:
A composite seal for sealing in high temperature applications includes an inner spring for controlling the sealing load or the spring rate, and an outer jacket for providing a sealing surface. In one embodiment, the inner spring, which be made from cast blade alloys, includes a plurality of flexible fingers which are inclined with respect to a longitudinal axis of the outer jacket having a continuous outer sealing surface. The spring rate of the jacket is preferably at least about 50% less than the spring rate of the spring in order to achieve desired sealing. In one embodiment, one or more of the flexible fingers a single crystal construction and are supported by a holding ring. The axis of the finger may preferably be positioned parallel to a softer crystallographic direction of the blade alloy of the finger.

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Advanced Gas Turbine Systems Research, Technical Quarterly Progress Reort, Jul. 2001-Sep. 2007, South Carolina Institute for Energy Studies, All Pages.

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