Endwall arc segments with cover across joint
An article includes first and second endwall arc segments that include a gaspath side and airfoils on the gaspath side. Each of the first and second endwall arc segments include first and second circumferential mate faces. The first circumferential mate face of the first endwall arc segment forms a joint with the second circumferential mate face of the second endwall arc segment. A cover on the gaspath side spans across at least a portion of the joint.
1. An article comprising:
first and second endwall arc segments including a gaspath side having a plurality of airfoils on the gaspath side, wherein the plurality of airfoils include a static airfoil and a variable airfoil, each of the first and second endwall arc segments including first and second circumferential mate faces, the first circumferential mate face of the first endwall arc segment forming a joint with the second circumferential mate face of the second endwall arc segment; and
a cover on the gaspath side spanning across at least a portion of the joint.
2. The article as recited in claim 1 , wherein one of the airfoils is at the joint.
3. The article as recited in claim 1 , wherein the cover is non-destructively removable from the first and second endwall arc segments.
4. The article as recited in claim 1 , wherein the first mate face includes a bearing receiver and the second mate face includes a bearing hub disposed in the bearing receiver.
5. The article as recited in claim 1 , wherein the cover is moveable from an initial position to an intermediate non-seated position between two of the airfoils in which the cover does not span across the joint, and the cover is rotatable from the intermediate position to a fully seated position spanning across at least a portion of the joint.
6. The article as recited in claim 1 , wherein the variable airfoil is rotatable in a bearing hub, and the cover includes a hub profile portion that conforms to the bearing hub.
7. The article as recited in claim 6 , wherein the cover includes an airfoil profile portion, and the airfoil profile portion conforms to the static airfoil.
8. The article as recited in claim 1 , further comprising a third endwall arc segment that also has respective first and second circumferential mate faces, the second mate face of the third endwall arc segment forming a second joint with the first mate face of the second endwall arc segment, and the cover spans across a portion of the second joint.
9. The article as recited in claim 1 , wherein the cover conforms with circumferentially non-consecutive ones of the airfoils.
10. The article as recited in claim 1 , wherein the cover includes a first lock member and the second endwall arc segment includes a second lock member engaging the first lock member and limiting movement of the cover.
11. The article as recited in claim 1 , wherein the cover is disposed radially between the variable airfoil and at least one of the first and second endwall arc segments.
12. The article as recited in claim 1 , wherein the cover includes ceramic.
13. The article as recited in claim 12 , wherein the plurality of airfoils include a static airfoil and a variable airfoil, the cover is moveable from an initial position to an intermediate non-seated position between two of the airfoils in which the cover does not span across the joint, and the cover is rotatable from the intermediate position to a fully seated position spanning across at least a portion of the joint.
14. The article as recited in claim 13 , wherein the cover conforms with circumferentially non-consecutive ones of the airfoils, and the cover is non-destructively removable from the first and second endwall arc segments.
15. A gas turbine engine comprising:
a compressor section;
a combustor in fluid communication with the compressor section; and
a turbine section in fluid communication with the combustor,
at least one of the turbine section or the compressor section including an article having first and second endwall arc segments including a gaspath side having a plurality of airfoils on the gaspath side, each of the first and second endwall arc segments including first and second circumferential mate faces, the first circumferential mate face of the first endwall arc segment forming a joint with the second circumferential mate face of the second endwall arc segment, and a cover on the gaspath side spanning across at least a portion of the joint, wherein the cover is moveable from on initial position to an intermediate non-seated position between two of the airfoils in which the cover does not span across the joint, and the cover is rotatable from the intermediate position to a fully seated position spanning across at least a portion of the joint.
16. The gas turbine engine as recited in claim 15 , wherein the plurality of airfoils include a static airfoil.
17. The gas turbine engine as recited in claim 15 , wherein the plurality of airfoils include a static airfoil and a variable airfoil, and the variable airfoil is at the joint.
18. An article comprising:
first, second, and third endwall arc segments including a gaspath side having a plurality of airfoils on the gaspath side, each of the first, second, and third endwall arc segments including first and second circumferential mate faces, the first circumferential mate face of the first endwall arc segment forming a first joint with the second circumferential mate face of the second endwall arc segment, and the second circumferential mate face of the second endwall arc segment forming a second joint with the first circumferential mate face of the third endwall arc segment; and
a cover on the gaspath side spanning across at least portions of the first and second joints.
19. The article as recited in claim 18 , wherein the cover includes ceramic, and the plurality of airfoils include static airfoils and variable airfoils.
20. An article comprising:
first and second endwall arc segments including a gaspath side having a plurality of airfoils on the gaspath side, each of the first and second endwall arc segments including first and second circumferential mate faces, the first circumferential mate face of the first endwall arc segment forming a joint with the second circumferential mate face of the second endwall arc segment;
a cover on the gaspath side spanning across at least a portion of the joint; and
a third endwall arc segment that also has respective first and second circumferential mate faces, the second mate face of the third endwall arc segment forming a second joint with the first mate face of the second endwall arc segment, and the cover spans across a portion of the second joint.
21. The article as recited in claim 20 , wherein the cover includes ceramic.
22. The article as recited in claim 21 , wherein the cover is moveable from an initial position to an intermediate non-seated position between two of the airfoils in which the cover does not span across the joint, and the cover is rotatable from the intermediate position to a fully seated position spanning across at least a portion of the joint.
23. The article as recited in claim 22 , wherein the cover conforms with circumferentially non-consecutive ones of the airfoils, and the cover is non-destructively removable from the first and second endwall arc segments.
24. The article as recited in claim 23 , wherein the cover includes an airfoil profile portion and the plurality of airfoils includes a static airfoil and a variable airfoil, and the airfoil profile portion conforms to the static airfoil.