Blade track assembly, components, and methods

Patent metadata

Field	Value
Publication number	US-10837302-B2
Application number	US-201715695476-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Dec 31, 2011
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A blade track assembly is disclosed having a variety of features. The assembly can have annular or segmented components, or a combination of the two. In one form the assembly includes blade tracks having a forward and aft edge that can be received in an opening of respective hangers. The hangers can include anti-movement features to discourage movement of a blade track. A rib can extend between hangers and in one form can be used as part of a seal assembly. Clips can be used to secure the blade track in openings of the respective hangers, as well as to discourage movement of the blade track.

First claim

The invention claimed is:

1. An apparatus comprising:
a first blade track segment adapted to extend partway around a central axis of a gas turbine engine, the first blade track segment having a forward end, an aft end spaced apart axially from the forward end, a radially inner side, and a radially outer side opposite the radially inner side of the first blade track segment,
a second blade track segment having a forward end, an aft end spaced apart axially from the forward end, a radially inner side, and a radially outer side opposite the radially inner side of the second blade track segment,
a hanger assembly adapted to extend circumferentially about the central axis and support the first and second blade track segments, the hanger assembly including a circumferentially extending forward hanger that receives the forward ends of the first and second blade track segments, a circumferentially extending aft hanger that receives the aft ends of the first and second blade track segments, and an axially extending first rib that interconnects the forward hanger and the aft hanger,
wherein the first rib engages a portion of the radially outer side of the first blade track segment and a portion of the radially outer side of the second blade track segment,
wherein the hanger assembly further includes an axially extending second rib that interconnects the forward hanger and the aft hanger and the second rib is spaced apart circumferentially from the first rib.

2. The apparatus of claim 1 , wherein the first rib is u-shaped and includes a backplate, a first side that extends away from the backplate, and a second side that extends away from the backplate.

3. The apparatus of claim 2 , wherein the first side includes an end that conforms to a shape of the radially outer side of the first blade track segment and the second side includes an end that conforms to a shape of the radially outer side of the second blade track segment.

4. The apparatus of claim 3 , wherein the backplate is formed to include a u-shaped depression.

5. The apparatus of claim 1 , wherein the first rib includes a first side having an end that conforms to a shape of the radially outer side of the first blade track segment and a second side that has an end that conforms to a shape of the radially outer side of the second blade track segment.

6. An apparatus comprising:
a first blade track segment adapted to extend partway around a central axis of a gas turbine engine, the first blade track segment having a forward end, an aft end spaced apart axially from the forward end, a radially inner side, and a radially outer side opposite the radially inner side of the first blade track segment,
a second blade track segment having a forward end, an aft end spaced apart axially from the forward end, a radially inner side, and a radially outer side opposite the radially inner side of the second blade track segment,
a hanger assembly adapted to extend circumferentially about the central axis and support the first and second blade track segments, the hanger assembly including a circumferentially extending forward hanger that receives the forward ends of the first and second blade track segments, a circumferentially extending aft hanger that receives the aft ends of the first and second blade track segments, and an axially extending first rib that interconnects the forward hanger and the aft hanger,
wherein the first rib engages a portion of the radially outer side of the first blade track segment and a portion of the radially outer side of the second blade track segment,
wherein the forward hanger includes a first u-shaped member and a second u-shaped member, the first u-shaped member extends in an aft direction and is formed to define an opening that receives the forward end of the first and second blade track segments, the second u-shaped member extends in a forward direction and includes a scalloped edge configured to interact with a corresponding feature included in a static structure of the gas turbine engine.

7. The apparatus of claim 6 , wherein the first blade track segment further includes a first arc end and a second arc end spaced apart circumferentially from the first arc end, the radially outer side of the first blade track segment includes a first raised seal portion disposed near the first arc end of the first blade track segment, and the first raised seal portion is configured to engage the first rib to discourage passage of a working fluid between the radially inner side and the radially outer side of the first blade track segment.

8. The apparatus of claim 7 , wherein the radially outer side of the first blade track segment further includes a second raised seal portion disposed near the second arc end of the first blade track segment.

Assignees

• Rolls Royce Nam Tech Inc

Inventors

• Smith Clayton C
• Griffiths George F
• Freeman Ted Joseph
• Westphal William

Classifications

• Y02T50/60

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

• F01D11/005

  Sealing means between non relatively rotating elements · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• Y10T29/4932

  Turbomachine making · CPC title

• F05D2230/60

  Assembly methods · CPC title