CMC BOAS axial retaining clip
A blade outer air seal assembly contains a support structure. A blade outer air seal extends circumferentially about an axis and is mounted in the support structure. The support structure has a first support member that engages a first axial side of the blade outer air seal. A second support member engages a second axial side of the blade outer air seal. A retaining clip secures the blade outer air seal to the support structure. The retaining clip has a first leg and a second leg that extends in a generally radial direction. The first leg abuts the first axial side and the second leg abuts the first support member.
1. A blade outer air seal assembly, comprising:
a support structure;
a blade outer air seal extending circumferentially about an axis and mounted in the support structure, wherein the support structure has a first support member engaging a first axial side of the blade outer air seal and a second support member engaging a second axial side of the blade outer air seal; and
a retaining clip securing the blade outer air seal to the support structure, wherein the retaining clip has a first leg and a second leg extending in a generally radial direction, the first leg abuts the first axial side and the second leg abuts the first support member.
2. The blade outer air seal assembly of claim 1 , wherein the first and second legs extend from an axial portion such that the retaining clip forms a C shape.
3. The blade outer air seal assembly of claim 2 , wherein the first leg and the axial portion are in contact with the blade outer air seal.
4. The blade outer air seal assembly of claim 2 , wherein the second leg and the axial portion are in contact with the first support member.
5. The blade outer air seal assembly of claim 1 , wherein the first and second legs act as a spring loaded clip.
6. The blade outer air seal assembly of claim 1 , wherein the first leg is longer than the second leg.
7. The blade outer air seal assembly of claim 1 , wherein the second leg has a flange at a radially inner end.
8. The blade outer air seal assembly of claim 1 , wherein the retaining clip and blade outer air seal each have a passage for cooling air.
9. The blade outer air seal assembly of claim 8 , wherein the retaining clip and blade outer air seal passages are circumferentially aligned to form a generally radial cooling passage.
10. The blade outer air seal assembly of claim 1 , wherein the blade outer air seal comprises a plurality of segments arranged circumferentially to form an annulus about the axis.
11. The blade outer air seal assembly of claim 10 , wherein the retaining clip comprises a plurality of clip segments arranged circumferentially to form an annulus about the axis.
12. The blade outer air seal assembly of claim 11 , wherein the clip segments are offset from the blade outer air seal segments.
13. The blade outer air seal assembly of claim 10 , wherein a number of clip segments is less than or equal to a number of blade outer air seal segments.
14. The blade outer air seal assembly of claim 13 , wherein the number of blade segments is a multiple of the number of clip segments.
15. The blade outer air seal assembly of claim 1 , wherein the support structure is a unitary circular structure.
16. The blade outer air seal assembly of claim 1 , wherein the retaining clip is a metallic material.
17. The blade outer air seal assembly of claim 1 , wherein the retaining clip is formed from sheet metal.
18. The blade outer air seal assembly of claim 1 , wherein the structure is a metallic material and the blade outer air seal is a ceramic matrix composite material.
19. The blade outer air seal assembly of claim 1 , wherein the blade outer air seal is a monolithic ceramic.
20. The blade outer air seal assembly of claim 1 , wherein the blade outer air seal is formed from a different material than the retaining clip.