Actuator for gas turbine engine blade outer air seal
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.
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.