Flexible ceramic matrix composite seal

Patent metadata

Field	Value
Publication number	US-9757920-B2
Application number	US-201314140663-A
Country	US
Kind code	B2
Filing date	Dec 26, 2013
Priority date	Mar 15, 2013
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A ceramic matrix composite seal is disclosed. The ceramic matrix composite seal including a ceramic matrix and a number of ceramic fiber fabrics embedded in the ceramic matrix. The ceramic matrix composite seal is formed into a strip with a desired geometry such that the seal strip is configured to be assembled with a number of components to create a seal between the components.

First claim

What is claimed is:

1. A ceramic matrix composite seal comprising:
a ceramic matrix,
a first fiber assembly embedded in the ceramic matrix, the first fiber assembly including a first top fabric and a second top fabric,
a second fiber assembly embedded in the ceramic matrix, the second fiber assembly including a first bottom fabric and a second bottom fabric, the second fiber assembly spaced apart from and opposite the first fiber assembly,
wherein the second top fabric of the first fiber assembly is coupled to the first bottom fabric of the second fiber assembly by the ceramic matrix, the first top fabric and the second top fabric determine the shape of the first fiber assembly, and the first bottom fabric and the second bottom fabric determine the shape of the second fiber assembly and,
flexible seal slots including a first flexible seal slot and a second flexible seal slot formed in first and second sidewalls, respectively, of the ceramic matrix and sandwiched between the first fiber assembly and the second fiber assembly and extending longitudinally along an entire length of the ceramic matrix composite seal, wherein the ceramic matrix composite seal includes a first component and a second component and the flexible seal slots are in contact with the first component and the second component such that the first component and the second component remain in contact while the components expand, contract, and vibrate, wherein the ceramic matrix composite seal has a first end portion and a second end portion, and wherein the first end portion of the ceramic matrix composite seal includes the first sidewall, the first flexible seal slot, and first end portions of the first top fabric and the second bottom fabric that are received into a first slot of the first component and the second end portion of the ceramic matrix composite seal includes the second sidewall, the second flexible seal slot, and second end portions of the first top fabric and the second bottom fabric that are received into a second slot of the second component.

2. The ceramic matrix composite seal of claim 1 , wherein the second fiber assembly is about flat and the first fiber assembly includes a depression along a length of the first fiber assembly at a center of the first fiber assembly, and the depression extends toward the second fiber assembly.

3. The ceramic matrix composite seal of claim 1 , wherein the first fiber assembly includes a first depression along a length of the first fiber assembly at a center of the first fiber assembly, the first depression extending toward the second fiber assembly, and the second fiber assembly includes a second depression along a length of the second fiber assembly at a center of the second fiber assembly, and the second depression extends toward the first fiber assembly.

4. The ceramic matrix composite seal of claim 1 , wherein the first top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the first top fabric lie in a first plane, the third portion of the first top fabric lies in a second plane spaced apart from, parallel with, and below the first plane,
the second top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the second top fabric lie in the second plane, the third portion of the second top fabric lies in a third plane spaced apart from, parallel with, and below the second plane,
the first bottom fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first, second, and third portions of the first bottom fabric lie in a fourth plane spaced apart from, parallel with, and below the third plane, and
the second bottom fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first, second, and third portions of the second bottom fabric lie in a fifth plane spaced apart from, parallel with, and below the fourth plane.

5. The ceramic matrix composite seal of claim 1 , wherein the first top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the first top fabric lie in a first plane, the third portion of the first top fabric lies in a second plane spaced apart from, parallel with, and below the first plane,
the second top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the second top fabric lie in the second plane, the third portion of the second top fabric lies in a third plane spaced apart from, parallel with, and below the second plane,
the first bottom fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and the second portions of the first bottom fabric lie in a fourth plane spaced apart from, parallel with, and below the third plane, the third portion of the first bottom fabric lies in a fifth plane spaced apart from, parallel with, and below the fourth plane, and
the second bottom fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the second bottom fabric lie in the fifth plane, and the third portion of the second bottom fabric lies in a sixth plane spaced apart from, parallel with, and below the fifth plane.

6. The ceramic matrix composite seal of claim 5 further including reinforcement structure extending through the third portions of the first top fabric, second top fabric, first bottom fabric, and the second bottom fabric in a direction about perpendicular to the first plane.

7. The ceramic matrix composite seal of claim 1 , wherein the first top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the first top fabric lie in a first plane, the third portion of the first top fabric lies in a second plane spaced apart from, parallel with, and below the first plane,
the second top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and third portions of the second top fabric lie in a third plane spaced apart from, parallel with, and below the second plane, the second portion of the second top fabric lies in the second plane,
the first bottom fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and the third portions of the first bottom fabric lie in a fourth plane spaced apart from, parallel with, and below the third plane, the second portion of the first bottom fabric lies in a fifth plane spaced apart from, parallel with, and below the fourth plane, and
the second bottom fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and second portions of the second bottom fabric lie in a sixth plane spaced apart from, parallel with, and below the fifth plane, and the third portion of the second bottom fabric lies in the fifth plane.

8. The ceramic matrix composite seal of claim 1 , wherein the first top fabric includes a first portion, a second portion, and a third portion coupled between the first and the second portions, the first and third portions of the first top fabric lie in a second plane, the second portion of the first top fabric lies in a first plane spaced apart from, paralle

Assignees

• Rolls Royce Corp

Inventors

• Lazur Andrew J

Classifications

• C04B2237/38

  Fiber or whisker reinforced · CPC title

• Y10T428/24628

  Nonplanar uniform thickness material · CPC title

• B32B18/00

  Layered products essentially comprising ceramics, e.g. refractory products · CPC title

• F05D2300/6034

  Orientation of fibres, weaving, ply angle · CPC title

• Y10T428/24174

  including sheet or component perpendicular to plane of web or sheet · CPC title