Wear liner for blade outer air seal
A blade outer air seal assembly includes a seal segment that has a base portion that extends between a first circumferential side and a second circumferential side and from a first axial side to a second axial side. A first wall is axially spaced from a second wall. The first and second walls extend from the base portion to an outer wall to define a circumferentially extending seal passage. A wear liner is within the seal passage.
1. A blade outer air seal assembly, comprising:
a seal segment having a base portion extending between a first circumferential side and a second circumferential side and from a first axial side to a second axial side, a first wall axially spaced from a second wall, the first and second walls extending from the base portion to an outer wall to define a circumferentially extending seal passage; and
a wear liner within the seal passage, wherein the wear liner has a first tab and a second tab configured to engage first and second edges of the outer wall.
2. The assembly of claim 1 , wherein the seal segment is a ceramic matrix composite material.
3. The assembly of claim 1 , wherein the first and second tabs are configured to engage a carrier.
4. The assembly of claim 1 , wherein the first and second tabs extend generally axially outward from a radially outer portion of the wear liner.
5. The assembly of claim 1 , wherein the first and second tabs are centered on a radially outer portion of the wear liner in an axial direction.
6. The assembly of claim 1 , wherein the first and second tabs have a length that is smaller than a flat portion of the outer wall.
7. The assembly of claim 1 , wherein the wear liner has radially inner and outer portions joined by axially forward and axially aft portions to form a liner passage.
8. The assembly of claim 7 , wherein the liner passage is configured to engage a carrier.
9. The assembly of claim 7 , wherein the liner passage is arranged coaxially within the seal passage.
10. The assembly of claim 1 , wherein the wear liner extends a circumferential width of the outer wall.
11. The assembly of claim 1 , wherein the wear liner has a height that is less than a height of the seal passage.
12. The assembly of claim 1 , wherein the wear liner is formed from sheet metal.
13. A turbine section for a gas turbine engine, comprising:
a turbine blade extending radially outwardly to a radially outer tip and for rotation about an axis of rotation;
a blade outer air seal having a plurality of segments mounted in a support structure via a carrier, the plurality of segments arranged circumferentially about the axis of rotation and radially outward of the outer tip;
each seal segment having a base portion extending between a first circumferential side and a second circumferential side and from a first axial side to a second axial side, a first wall axially spaced from a second wall, the first and second walls extending from the base portion to an outer wall to define a circumferentially extending seal passage;
a wear liner arranged between each seal segment and the carrier.
14. The turbine section of claim 13 , wherein the wear liner has a radially extending tab engaged with an edge of the outer wall.
15. The turbine section of claim 14 , wherein the tab is arranged between the edge of the outer wall and a post on the carrier.
16. The turbine section of claim 13 , wherein the wear liner has radially inner and outer portions joined by axially forward and axially aft portions to form a liner passage, and a portion of the carrier is arranged within the liner passage.
17. The turbine section of claim 13 , wherein the seal segment is a ceramic matrix composite material, the wear liner is a metallic material, and the carrier is a metallic material.
18. A method of assembly a blade outer air seal assembly, comprising:
providing a seal segment having a base portion extending between a first circumferential side and a second circumferential side and from a first axial side to a second axial side, a first wall axially spaced from a second wall, the first and second walls extending from the base portion to an outer wall to define a circumferentially extending seal passage;
inserting a wear liner having a liner passage into the seal passage; and
inserting a portion of a carrier into the liner passage.
19. The method of claim 18 , wherein the seal segment is a ceramic matrix composite material, the wear liner is a metallic material, and the carrier is a metallic material.