Damper for stator assembly

Patent metadata

Field	Value
Publication number	US-9790809-B2
Application number	US-201514666458-A
Country	US
Kind code	B2
Filing date	Mar 24, 2015
Priority date	Mar 24, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A stator assembly for a gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, at least one stator vane including a platform, a seal member connected to the platform, and a damper between the platform and the seal member. The damper includes a plurality of first fingers and a plurality of second fingers, which are provided in an alternating arrangement.

First claim

What is claimed is:

1. A stator assembly for a gas turbine engine, comprising:
at least one stator vane including a platform;
a seal member connected to the platform; and
a damper between the platform and the seal member, the damper including a plurality of first fingers and a plurality of second fingers, the first and second fingers provided in an alternating arrangement, wherein the damper includes a first piece supporting the first fingers, the damper includes a second piece supporting the second fingers, and the damper includes a bridge piece connected to both the first piece and the second piece.

2. The assembly as recited in claim 1 , wherein the bridge piece is in direct contact with the platform.

3. The assembly as recited in claim 1 , wherein:
the first piece includes a first finger support;
the second piece includes a second finger support;
the first fingers extend from the first finger support at a non-zero angle; and
the second fingers extend from the second finger support at the non-zero angle.

4. The assembly as recited in claim 3 , wherein the non-zero angle is within a range of about 10 to 30 degrees.

5. The assembly as recited in claim 3 , wherein the first finger support and the second finger support extend in a direction substantially parallel to an engine central longitudinal axis.

6. The assembly as recited in claim 1 , wherein the first and second fingers include a free end having a curvature following a radius, the radius having an origin radially outward of the respective finger.

7. The assembly as recited in claim 6 , wherein the free ends of the first and second fingers each have an apex providing a radially innermost point of the respective finger.

8. The assembly as recited in claim 7 , wherein the first and second fingers each have a terminal end spaced radially outward of the apex of the respective finger.

9. The assembly as recited in claim 1 , wherein the seal member supports an abradable seal material relative to a plurality of knife edge seals.

10. The assembly as recited in claim 9 , wherein the damper biases the seal carrier.

11. A stator assembly for a gas turbine engine, comprising:
at least one stator vane including a platform;
a seal member connected to the platform; and
a damper between the platform and the seal member, the damper including a plurality of first fingers and a plurality of second fingers, the damper further including a first piece supporting the first fingers and a second piece supporting the second fingers, wherein the first and second pieces are initially formed as separate structures.

12. The assembly as recited in claim 11 , wherein the damper includes a bridge piece connected to both the first piece and the second piece.

13. The assembly as recited in claim 12 , wherein the bridge piece is in direct contact with the platform, and wherein the plurality of first and second fingers are in direct contact with the seal member.

14. A damper for a stator assembly, comprising:
a plurality of first fingers;
a plurality of second fingers, the first and second fingers provided in an alternating arrangement;
a first piece supporting the first fingers;
a second piece supporting the second fingers; and
a bridge piece connected to both the first piece and the second piece.

15. The damper as recited in claim 14 , wherein:
the first piece includes a first finger support;
the second piece includes a second finger support; and
the bridge piece is connected to the first finger support and the second finger support.

16. The damper as recited in claim 15 , wherein:
the first fingers extend from the first finger support at a non-zero angle; and
the second fingers extend from the second finger support at the non-zero angle.

17. The damper as recited in claim 16 , wherein the non-zero angle is within a range of about 10 to 30 degrees.

18. The damper as recited in claim 16 , wherein the first finger support and the second finger support extend in a direction substantially parallel to one another.

Assignees

• United Technologies Corp

Inventors

• Dube David P
• Leslie Nicholas R
• Butcher Randall J

Classifications

• F05D2220/32

  in gas turbines · CPC title

• F01D11/001

  for sealing space between stator blade and rotor · CPC title

• F01D11/122

  with erodable or abradable material (blades having cutting or grinding tips F01D5/20) · CPC title

• F01D9/041

  using blades (F01D5/148 takes precedence) · CPC title

• F05D2240/55

  Seals · CPC title