Turbine shroud

Patent metadata

Field	Value
Publication number	US-10094233-B2
Application number	US-201314095714-A
Country	US
Kind code	B2
Filing date	Dec 3, 2013
Priority date	Mar 13, 2013
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A turbine shroud for a gas turbine engine includes an annular metallic carrier, a blade track, and a cross-key connection formed between the annular metallic carrier and the ceramic blade track. The cross-key connection is formed between the annular metallic carrier and inserts included in the blade track. The inserts are bonded to an annular runner also included in the blade track by a braze layer.

First claim

What is claimed is:

1. A turbine blade track comprising
an annular ceramic runner formed to include a plurality of cutouts extending inward in a radial direction from an outer radial surface of the annular ceramic runner toward an inner radial surface of the annular ceramic runner, and
a plurality of inserts each arranged to extend into a corresponding one of the plurality of cutouts formed in the annular ceramic runner from the outer radial surface of the annular ceramic runner toward the inner radial surface of the annular ceramic runner, wherein each of the inserts has an arcuate inner radial surface that is coextensive with an inner radial surface of the annular ceramic runner.

2. The turbine blade track of claim 1 , further comprising a plurality of braze layers arranged between the annular ceramic runner and each of the plurality of inserts.

3. The turbine blade track of claim 1 , wherein each of the plurality of inserts extend outward in the radial direction from the outer radial surface of the annular ceramic runner to form keys included in the turbine blade track.

4. A turbine blade track comprising
an annular ceramic runner formed to include a plurality of cutouts extending inward in a radial direction from an outer radial surface of the annular ceramic runner toward an inner radial surface of the annular ceramic runner, and
a plurality of inserts each arranged to extend into a corresponding one of the plurality of cutouts formed in the annular ceramic runner from the outer radial surface of the annular ceramic runner toward the inner radial surface of the annular ceramic runner, wherein each of the plurality of inserts is cross-shaped and includes a radially-extending member and a circumferentially-extending member, and wherein the radially-extending members and the circumferentially-extending members of each of the plurality of inserts are at least partially received in a corresponding one of the plurality of cutouts.

5. The turbine blade track of claim 1 , wherein each of the plurality of inserts includes an aft axial surface that is coplanar with an aft axial surface of the annular ceramic runner.

6. A turbine blade track comprising
an annular ceramic runner formed to include a plurality of cutouts extending inward in a radial direction from an outer radial surface of the annular ceramic runner toward an inner radial surface of the annular ceramic runner, and
a plurality of inserts each arranged to extend into a corresponding one of the plurality of cutouts formed in the annular ceramic runner from the outer radial surface of the annular ceramic runner toward the inner radial surface of the annular ceramic runner, wherein each of the plurality of inserts is formed to include a keyway extending inward in the radial direction from an outer radial surface of each insert and each keyway has circumferential sides configured to engage a corresponding key included in a carrier to block rotation of the turbine blade track about a central axis of the annular ceramic runner when coupled to the carrier.

7. The turbine blade track of claim 6 , wherein the keyway of each of the plurality of inserts extends aft from a forward axial surface of each insert.

8. The turbine blade track of claim 1 , wherein the annular ceramic runner consists essentially of ceramic matrix composite.

9. The turbine blade track of claim 8 , wherein the insert consists essentially of ceramic matrix composite.

Assignees

• Rolls Royce Corp
• Rolls Royce Nam Tech Inc

Inventors

• Landwehr Sean E
• Westphal William
• Freeman Ted J
• Chamberlain Adam L

Classifications

• F05D2300/6033

  Ceramic matrix composites [CMC] · CPC title

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• F01D25/246

  Fastening of diaphragms or stator-rings · CPC title

• F01D11/08 Primary

  for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20) · CPC title

• F05D2230/64

  using positioning or alignment devices for aligning or centring, e.g. pins · CPC title