Segmented turbine shroud with seals

Patent metadata

Field	Value
Publication number	US-9945256-B2
Application number	US-201514734802-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Jun 27, 2014
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A turbine shroud for a gas turbine engine includes a plurality of shroud segments arranged around a central axis. Each shroud segment includes a carrier segment, a blade track segment, and a radial seal element that seals a radial interface between the carrier segment and the blade track segment. The turbine shroud further includes a plurality of circumferential seals that seal circumferential interfaces between the shroud segments.

First claim

What is claimed is:

1. A segmented turbine shroud that extends around a central axis, the segmented turbine shroud comprising
a first shroud segment including a first carrier segment and a first blade track segment, the first blade track segment made from a ceramic-matrix-composite material and coupled to the first carrier segment,
a second shroud segment arranged circumferentially adjacent to the first shroud segment around the central axis, the second shroud segment including a second carrier segment and a second blade track segment, the second blade track segment made from a ceramic-matrix-composite material and coupled to the first carrier segment, and
a circumferential seal arranged between the first shroud segment and the second shroud segment to block gasses from passing through a circumferential interface of the first shroud segment and the second shroud segment, the circumferential seal including a first seal support coupled to the first shroud segment, a second seal support coupled to the second shroud segment, and a seal element that extends from the first seal support to the second seal support,
wherein the first blade track segment includes an arcuate runner and a first attachment post that extends from the arcuate runner to the first carrier segment.

2. The segmented turbine shroud of claim 1 , wherein the seal element is a strip seal that extends into a seal-receiving slot formed in the second seal support.

3. The segmented turbine shroud of claim 1 , wherein the first seal support forms a channel that receives a portion of the first carrier segment and a portion of the first blade track segment.

4. The segmented turbine shroud of claim 3 , wherein the second seal support forms a channel that receives a portion of the second carrier segment and a portion of the second blade track segment.

5. The segmented turbine shroud of claim 3 , wherein the first blade track segment includes a support hanger that extends from the arcuate runner into the channel formed by the first seal support.

6. The segmented turbine shroud of claim 5 , wherein the support hanger includes a radially-extending portion that extends from the arcuate runner and a circumferentially-extending portion that extends from the radially-extending portion into the channel formed by the first seal support.

7. The segmented turbine shroud of claim 1 , wherein the first blade track segment includes a second attachment post circumferentially spaced apart from the first attachment post, the second attachment post extends parallel to the first attachment post from the arcuate runner to the first carrier segment, the first carrier segment is formed to include a first post-receiving aperture and a second post-receiving aperture, the first attachment post extends through the first post-receiving aperture, and the second attachment post extends through the second post-receiving aperture.

8. The segmented turbine shroud of claim 1 , wherein the first blade track segment includes a support hanger that extends from the arcuate runner into a channel formed by the first seal support.

9. The segmented turbine shroud of claim 8 , wherein the support hanger includes a radially-extending portion that extends from the arcuate runner and a circumferentially-extending portion that extends from the radially-extending portion into the channel formed by the first seal support.

10. The segmented turbine shroud of claim 1 , wherein the first shroud segment includes a first radial seal element arranged radially between the first carrier segment and the first blade track segment to block gasses from passing through a radial interface of the first carrier segment and the first blade track segment.

11. The segmented turbine shroud of claim 10 , wherein the first radial seal element is a rope seal.

12. The segmented turbine shroud of claim 11 , wherein the first carrier segment includes a mount plate and a seal-support wall that extends radially from the mount plate toward the first blade track segment, the seal-support wall formed to include a rope-receiving channel facing the first blade track segment that receives the rope seal.

13. A segmented turbine shroud that extends around a central axis, the segmented turbine shroud comprising
a first shroud segment including a first carrier segment and a first blade track segment, the first blade track segment made from a ceramic-matrix-composite material and coupled to the first carrier segment,
a second shroud segment arranged circumferentially adjacent to the first shroud segment around the central axis, the second shroud segment including a second carrier segment and a second blade track segment, the second blade track segment made from a ceramic-matrix-composite material and coupled to the first carrier segment, and
a circumferential seal arranged between the first shroud segment and the second shroud segment to block gasses from passing through a circumferential interface of the first shroud segment and the second shroud segment, the circumferential seal including a first seal support coupled to the first shroud segment, a second seal support coupled to the second shroud segment, and a seal element that extends from the first seal support to the second seal support,
wherein the first shroud segment includes a first radial seal element arranged radially between the first carrier segment and the first blade track segment to block gasses from passing through a radial interface of the first carrier segment and the first blade track segment, and the first shroud segment includes a second radial seal element arranged radially between the first carrier segment and the first blade track segment to block gasses from passing through the radial interface of the first carrier segment and the first blade track segment, the first blade track segment includes an arcuate runner and an attachment post that extends from the arcuate runner to the first carrier segment, and the attachment post of the first ceramic blade track is located axially between the first radial seal element and the second radial seal element.

14. A shroud segment for use in a segmented turbine shroud that extends around a central axis, the shroud segment comprising
a carrier segment,
a blade track segment coupled to the carrier segment,
a forward radial seal element arranged radially between the carrier segment and the blade track segment along a forward side of the blade track segment to block gasses from passing through a forward radial interface of the carrier segment and the blade track segment, and
an aft radial seal element arranged radially between the carrier segment and the blade track segment along an aft side of the blade track segment, spaced from the forward side along the central axis, to block gasses from passing through an aft radial interface of the carrier segment and the blade track segment,
wherein the blade track segment includes an arcuate runner and an attachment post that extends from the arcuate runner to the carrier segment, and the attachment post of the blade track is located axially between the forward radial seal element and the aft radial seal element.

15. The shroud segment of claim 14 , wherein the forward radial seal element and the aft radial seal element are each selected from a group including a rope seal, a strip seal, a feather sea, and a canted coil seal.

16. The shroud segment of claim 15 , wherein the carrier segment includes a mount plate, a forward seal-support wall that extends radially from the mount plate toward the blade track segment along a forward side of the mount plate formed to include a seal-eleme

Assignees

• Rolls Royce Coporation
• Rolls Royce Nam Tech Inc
• Rolls Royce Corp
• Rolls Royce Nam Tech Inc

Inventors

• Freeman Ted J
• Thomas David J
• Lamusga Joseph P
• Sippel Aaron D

Classifications

• F01D25/246 Primary

  Fastening of diaphragms or stator-rings · CPC title

• F05D2300/6033

  Ceramic matrix composites [CMC] · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• F01D11/12

  using a rubstrip, e.g. erodible. deformable or resiliently-biased part · CPC title