COMPOSITE RETENTION FEATURE

• US 20150044054A1
• Filed: 12/02/2013
• Published: 02/12/2015
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Rolls-Royce Corporation (Rolls-Royce Holdings Plc)
• Original Assignee: Rolls-Royce Corporation (Rolls-Royce Holdings Plc), Rolls-Royce North American Technologies, Inc. (Rolls-Royce Holdings Plc)
• Inventors: Chamberlain, Adam L., Freeman, Ted J., Loftus, Peter
• Granted Patent: US 9,506,356 B2
• Time in Patent Office: Days
• US Class Current: 416/220.R
• CPC Class Codes: E21B 44/00 Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
• CPC Class Codes: E21B 45/00 Measuring the drilling time or rate of penetration
• CPC Class Codes: F01D 5/3007 of axial insertion type
• CPC Class Codes: F01D 5/3084 the blades being made of ceramics
• CPC Class Codes: F01D 9/04 forming ring or sector
• CPC Class Codes: F05D 2230/237 Brazing
• CPC Class Codes: G01P 15/18 in two or more dimensions
• CPC Class Codes: Y10T 29/49337 Composite blade

Abstract

A retention feature for use in a gas turbine engine is disclosed herein. The retention feature includes a ceramic post, an insert, and a braze layer coupling the insert to the ceramic post. The ceramic post includes a body adapted to be coupled to a turbine engine component and a head coupled to the body. The insert is arranged in a space formed in the head and the braze layer extends from the ceramic post to the insert to bond the insert to the ceramic post.

Claims

1. A retention feature for use in a gas turbine engine comprising

a ceramic post including a body adapted to be coupled to a turbine engine component and a head coupled to the body, the head formed to include a space,

a first insert arranged in the space, and

a first braze layer extending from the ceramic post to the first insert to bond the first insert to the ceramic post.

2. The retention feature of claim 1, wherein the space forms a channel opening away from the body and extending through the head of the ceramic post.

3. The retention feature of claim 2, wherein the first insert is sized to fill a portion of the channel.

4. The retention feature of claim 2, wherein the first insert is U-shaped.

5. The retention feature of claim 1, further comprising a second insert arranged in the space and a second braze layer extending from the ceramic post to the second insert to bond the second insert to the ceramic post, wherein the second insert is spaced apart from the first insert and the space forms a channel opening away from the body and extending through the head of the ceramic post.

6. The retention feature of claim 5, wherein the first insert is sized to fill a portion of the channel and the second insert is sized to fill another portion of the channel spaced apart from the first portion of the channel.

7. The retention feature of claim 5, wherein the first insert is U-shaped and the second insert is U-shaped.

8. The retention feature of claim 1, wherein the first braze layer includes silicon.

9. The retention feature of claim 8, wherein the first braze layer includes a silicide.

10. The retention feature of claim 9, wherein the silicide includes at least one of zirconium, molybdenum, hafnium, boron, and carbon.

11. The retention feature of claim 8, wherein the first braze layer includes inert ceramic fibers.

12. The retention feature of claim 1, wherein the ceramic post consists essentially of a ceramic matrix composite and includes carbon and silicon.

13. The retention feature of claim 1, wherein the first insert consists essentially of a ceramic matrix composite.

14. The retention feature of claim 13, wherein the first insert includes silicon and carbon.

15. The retention feature of claim 13, wherein the first insert includes ceramic fiber fabric.

16. The retention feature of claim 13, wherein the first insert includes chopped ceramic fibers.

17. The retention feature of claim 1, wherein the body of the ceramic post has a proximal end coupled to an airfoil and a distal end coupled to the head and the airfoil includes a ceramic matrix material.

18. The retention feature of claim 1, wherein the body of the ceramic post has a proximal end coupled to a turbine blade track runner and a distal end coupled to the head and the turbine blade track runner includes a ceramic matrix material.

19. A method of making a retention feature for use in a gas turbine engine comprising the steps of

manufacturing a composite post including a body and a head coupled to the body, the head formed to include a space,

manufacturing a first insert,

arranging the first insert into the space formed in the head, and

depositing a first braze layer between the head and the first insert to bond the insert to the head.

20. The method of claim 19, wherein manufacturing the first insert includes (i) preforming a ceramic fiber sheet into a predetermined shape and (ii) densifying the preformed at least one ceramic fiber sheet.