Actuator for gas turbine engine blade outer air seal

Patent metadata

Field	Value
Publication number	US-10066497-B2
Application number	US-201414773861-A
Country	US
Kind code	B2
Filing date	Feb 18, 2014
Priority date	Mar 11, 2013
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A blade outer air seal (BOAS) actuator assembly, according to an exemplary aspect of the present disclosure includes, among other things, an actuator member; and a retractor configured to move with the actuator member to move a BOAS segment from a first position to a second position that is radially outside the first position, the BOAS segment seated against a support structure when in the first position and spaced from the support structure when in the second position.

First claim

I claim:

1. A blade outer air seal (BOAS) actuator assembly, comprising:
an actuator member; and
a retractor configured to move with the actuator member to move a BOAS segment from a first position to a second position that is radially outside the first position, the BOAS segment seated against a support structure when in the first position and spaced from the support structure when in the second position.

2. The BOAS actuator assembly of claim 1 , wherein the retractor extends laterally from the actuator member.

3. The BOAS actuator assembly of claim 1 , wherein the actuator member is a piston rod.

4. The BOAS actuator assembly of claim 1 , wherein the retractor is separate from the BOAS segment.

5. The BOAS actuator assembly of claim 1 , including at least one bumper extending radially from the retractor, the at least one bumper configured to contact a structure to limit radial movement of the BOAS segment.

6. The BOAS actuator assembly of claim 5 , wherein the at least one bumper is configured to contact the structure when the BOAS segment is in the second position.

7. The BOAS actuator assembly of claim 5 , wherein the structure comprises a control ring.

8. The BOAS actuator assembly of claim 5 , wherein the retractor has a triangular profile.

9. The BOAS actuator assembly of claim 8 , wherein the at least one bumper includes a bumper near each corner of the retractor.

10. The BOAS actuator of claim 1 , including an attachment structure extending from a radially outer face of the BOAS segment, the attachment structure including at least one hook.

11. The BOAS actuator of claim 10 , wherein the attachment structure of the BOAS segment seated against a support structure when in the first position and spaced from the support structure when in the second position.

12. A blade outer air seal (BOAS) assembly, comprising:
a seal body having a radial inner face that circumferentially extends between a first mate face and a second mate face and axially extends between a leading edge face and a trailing edge face;
an attachment structure extending from a radially outer face of the seal body, the attachment structure including at least one hook; and
a retractor configured to contact the at least one hook to move a BOAS segment from a first position to a second position that is radially outside the first position, the attachment structure of the BOAS segment seated against a support structure when in the first position and spaced from the support structure when in the second position.

13. The BOAS assembly of claim 12 , wherein the retractor is disconnected from the hook.

14. The BOAS assembly of claim 12 , wherein the retractor is moveable relative to the hook.

15. The BOAS assembly of claim 12 , wherein the BOAS segment is biased toward the first position.

16. The BOAS assembly of claim 15 , wherein bleed air provides a biasing force.

17. The BOAS assembly of claim 15 , wherein the retractor includes a radially inner surface that directly contacts the support structure in the first position.

Assignees

• United Technologies Corp

Inventors

• Duguay Brian

Classifications

• F05D2220/32

  in gas turbines · CPC title

• F01D11/22

  by mechanically actuating the stator or rotor components, e.g. moving shroud sections relative to the rotor · CPC title

• F01D11/20 Primary

  Actively adjusting tip-clearance · CPC title

• F05D2260/57

  using servos, independent actuators, etc. · CPC title

• F05D2240/30

  Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor · CPC title