US 8,133,014 B1Granted

Triple acting radial seal

AssigneeFlorida Turbine Technologies, Inc.

InventorsTodd A Ebert, John A Carella

Life of this patent

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Abstract

A triple acting radial seal used as an interstage seal assembly in a gas turbine engine, where the seal assembly includes an interstage seal support extending from a stationary inner shroud of a vane ring, the interstage seal support includes a larger annular radial inward facing groove in which an outer annular floating seal assembly is secured for radial displacement, and the outer annular floating seal assembly includes a smaller annular radial inward facing groove in which an inner annular floating seal assembly is secured also for radial displacement. A compliant seal is secured to the inner annular floating seal assembly. The outer annular floating seal assembly encapsulates the inner annular floating seal assembly which is made from a very low alpha material in order to reduce thermal stress.

Claims11

Dependent claims

An interstage seal assembly in a gas turbine engine comprising:

a segmented fixed interstage seal support secured to a stationary inner shroud of a stator vane;
a larger radial inward facing annular groove formed within the interstage seal support;
an outer floating seal assembly secured within the larger radial inward facing annular groove such that radial displacement of the outer floating seal assembly can occur within the larger radial inward facing annular groove;
the outer floating seal assembly forming a smaller radial inward facing annular groove;
an inner floating seal assembly secured within the smaller radial inward facing annular groove such that radial displacement of the inner floating seal assembly can occur within the smaller radial inward facing annular groove;
and,
an annular compliant seal secured to the inner floating seal assembly to form a seal with a rotor disk of the gas turbine engine.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/542,495Filed 17 Aug 2009 · us provisional application
Priority: 18 Aug 2008
Granted: 13 Mar 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F01D 11/025
By non-contact sealings, e.g. of labyrinth type: seal clearance control; Floating assembly; Adaptation means to differential thermal dilatations
F16J 15/3288
Characterised by their structure; Selection of materials: filamentary structures, e.g. brush seals
F16J 15/441
Free-space packings: with floating ring
F16J 15/4472
Labyrinth packings: with axial path