Multi-piece carrier assembly for mounting ceramic matrix composite seal segments

Patent metadata

Field	Value
Publication number	US-10858949-B2
Application number	US-201816129294-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 12, 2018
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A turbine shroud assembly includes a blade track, a multi-piece carrier and a mount assembly. The carrier includes a fore body and an aft body. Attachment pin of the mount assembly extends between fore body and aft body and through an eyelet in an attachment post of the blade track.

First claim

What is claimed is:

1. A turbine shroud adapted to be mounted outward of blades included in a turbine wheel assembly, the turbine shroud comprising:
a blade track segment comprising ceramic matrix composite materials, the blade track segment including a runner that extends partway around a central axis to define a primary gas path of the turbine shroud and an attachment feature,
a multi-piece carrier having a forward body and an aft body comprising metallic materials and coupled together at mating faces of each of the forward and aft bodies, and
a mount assembly configured to couple with the attachment feature, and having an axial stop pin that is fitted in a first closed face receiver of the aft body of the multi-piece carrier and contacts a wall of the attachment feature,
wherein the attachment feature includes an eyelet formed therethrough, and the mount assembly further comprises an attachment pin that is fitted in a second closed face receiver of each of the forward and aft bodies of the multi-piece carrier and extends through the eyelet and the mount assembly further comprises a pilot feature fitted in a third closed face receiver of the aft body of the multi-piece carrier and configured to align with and extend into a receiver in the forward body of the multi-piece carrier.

2. The turbine shroud of claim 1 , wherein the pilot feature further is configured to contact the receiver of the forward body of the multi-piece carrier prior to the attachment pin contacting one of the second closed face receivers of the multi-piece carrier during installation.

3. The turbine shroud of claim 2 , wherein the pilot feature extends a distance from the mating face of the aft body that is shorter than a distance that the attachment pin extends from the mating face of the aft body.

4. The turbine shroud of claim 1 , wherein the pilot feature has a diamond-shaped or close-tolerance cross-section.

5. The turbine shroud of claim 1 , wherein the mating faces of the forward and aft bodies are each planar.

6. The turbine shroud of claim 1 , further comprising a fastener that couples and extends through openings in the forward and aft bodies.

7. The turbine shroud of claim 1 , wherein the attachment pin is fitted in the second closed face receivers of the forward and aft bodies and the eyelet in one of a close tolerance, tight limit, or press fit attachment.

8. An assembly adapted for use in a gas turbine engine, the assembly comprising:
a blade track segment having an attachment feature,
a multi-piece carrier having a first body and a second body configured to be mounted to the blade track segment, and
a mount assembly including a stop pin that is fitted in, and extends from the second body of the multi-piece carrier and contacts a wall of the attachment feature,
wherein the attachment feature comprises an eyelet, and the mount assembly further comprises an attachment pin that is positioned in a first closed face receiver of each of the first and second bodies of the multi-piece carrier and extends through the eyelet,
wherein the attachment pin is fitted in the first closed face receivers of the first and second bodies and the eyelet in one of a close tolerance, tight limit, or press fit attachment,
wherein the mount assembly further comprises a pilot feature fitted in a second closed face receiver of the second body of the multi-piece carrier and configured to align with and extend into a receiver in the first body of the multi-piece carrier.

9. The assembly of claim 8 , wherein the pilot further is configured to contact the receiver of the first body of the multi-piece carrier prior to the attachment pin contacting the one of the first closed face receivers of the multi-piece carrier during installation.

10. The assembly of claim 9 , wherein the pilot feature extends a distance from a mating face of the second body that is shorter than a distance that the attachment pin extends from the mating face of the second body.

11. The assembly of claim 8 , wherein the pilot feature comprises a dowel pin that has a diamond-shaped or close-tolerance cross-section.

12. The assembly of claim 8 , further comprising a fastener that couples and extends through openings in the first and second bodies.

13. A turbine shroud comprising:
a blade track segment that includes a runner that extends circumferentially partway around a central axis and an attachment feature that extends radially from the runner,
a multi-piece carrier having a first body and a second body coupled together at mating faces and coupled with the attachment feature to support the blade track segment, and
a mount assembly including an axial stop pin that is received in the second body of the multi-piece carrier and abuts a radially extending and axial facing wall of the attachment feature of the blade track segment to maintain axial spacing between the first body, the second body, and the blade track segment.

14. The turbine shroud of claim 13 , wherein the attachment feature includes an eyelet formed therethrough, and the mount assembly further comprises an attachment pin that extends through the eyelet and into the first body and the second body to couple the blade track segment with the mount assembly.

15. The turbine shroud of claim 14 , wherein the attachment pin is fitted in a closed face receiver of each of the first body and the second body of the multi-piece carrier and extends through the eyelet formed in the attachment feature and wherein the mount assembly further comprises a pilot pin fitted in the second body of the multi-piece carrier and configured to align with and extend into the first body of the multi-piece carrier.

16. The turbine shroud of claim 13 , wherein the axial stop pin includes an axially extending body that abuts the attachment feature and a stop platform that extends outward from the body and engages the second body to locate the axial stop pin relative to the second body.

Assignees

• Rolls Royce Corp
• Rolls Royce Plc

Inventors

• Walston Jeffrey A
• Hurst Andrew

Classifications

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title

• F01D25/005

  Selecting particular materials · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• F05D2300/501

  Elasticity · CPC title