# US 11,028,719 B2 · Brush seal repair method

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- Number: US 11,028,719 B2
- Document ID: US11028719B2
- Status: Granted
- Kind: B2
- Application number: 16/183,815
- Filed: 2018-11-08
- Published: 2019-03-14
- Granted: 2021-06-08
- Earliest claimed: 2013-03-07
- Assignees: Raytheon Technologies Corporation
- Applicants: Raytheon Technologies Corporation
- Inventors: David E. Walker; Steven M. Cote
- Web page: https://patentgrep.com/patent/US11028719B2

## CPC

- F01D 11/08: for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20)
- F01D 11/001: {for sealing space between stator blade and rotor}
- F02C 7/28: Arrangement of seals
- F16J 15/3288: Filamentary structures, e.g. brush seals
- F05D 2230/80: Repairing, retrofitting or upgrading methods
- F05D 2240/56: Brush seals
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A method of working a brush seal assembly for a turbine engine is disclosed and includes the steps of removing an alignment tab from a used brush seal assembly, restoring at least one dimension of the alignment tab to a desired condition and attaching the restored alignment tab to a new brush seal assembly.

## Claims

### Claim 1

A method of repairing a brush seal assembly for a turbine engine, the method comprising:
removing an alignment tab from a used brush seal assembly;
restoring at least one dimension of the alignment tab to a desired condition; and
attaching the restored alignment tab to a new brush seal assembly.

### Claim 2 (depends on 1)

The method of repairing as recited in claim 1, wherein removing the alignment tab comprises cutting a portion of the used brush seal assembly including the alignment tab from the used brush seal assembly.

### Claim 3 (depends on 2)

The method of repairing as recited in claim 2, wherein the alignment tab includes an L-shaped cross section with a first part fixed to a first surface of the used brush seal assembly and a second part extending transverse from the first part.

### Claim 4 (depends on 3)

The method of repairing as recited in claim 3, wherein the first part of the alignment tab includes an opening for receiving a portion of a weld for attaching the alignment tab.

### Claim 5 (depends on 1)

The method of repairing as recited in claim 1, wherein the alignment tab comprises a rectangular section attached to an annular ring of the brush seal assembly.

### Claim 6 (depends on 2)

The method of repairing as recited in claim 2, wherein restoring the at least one dimension of the alignment tab includes adding material to the alignment tab.

### Claim 7 (depends on 6)

The method of repairing as recited in claim 6, including the step of machining the added material to restore the at least one dimensions to the desired condition.

### Claim 8 (depends on 1)

The method of repairing as recited in claim 1, wherein attaching the alignment tab to the new brush seal assembly comprise welding the restored alignment tab to a first surface of the new brush seal assembly in a location common with a location of the alignment tab on the used brush seal assembly.

### Claim 9 (depends on 8)

The method of repairing as recited in claim 8, wherein the new brush seal assembly includes at least one brush secured between an inner ring and an outer ring.