Gas turbine engine joint having a metallic member, a CMC member, and a ceramic key
AssigneeUnited Technologies Corporation
InventorsDavid C. Jarmon, Shaoluo L. Butler
Life of this patent
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Abstract
A first member is retained to a second member to resist separation in a first direction. A joint comprises a first recess in the first member. The first member comprises at least a ceramic matrix composite (CMC) substrate. The joint comprises at least one ceramic key partially accommodated in the first recess and engaging the second member. The second member comprises at least a metallic substrate.
Claims23
A joint retaining a first member to a second member to resist separation in a first direction, the joint comprising:
- a first recess in the first member, the first member comprising at least a fiber-reinforced ceramic matrix composite (CMC) substrate;
- and
- at least one ceramic key partially accommodated in the first recess and engaging the second member to resist said separation, the second member comprising at least a metallic substrate, wherein:
- the first member is a small exit duct (SED) of a reverse flow combustor and the joint is proximate a leading edge of the SED;
- the first member and the second member encircle an axis;
- there are a circumferential array of said first recesses;
- there are a circumferential array of said ceramic keys, each partially accommodated in a respective associated said first recess;
- said ceramic keys radially position the second member relative to the first member;
- and
- said ceramic keys are spring biased into engagement with the associated recesses.
A joint retaining a first member to a second member to resist separation in a first direction, the joint comprising:
- a first recess in the first member, the first member comprising at least a fiber-reinforced ceramic matrix composite (CMC) substrate;
- and
- at least one ceramic key partially accommodated in the first recess and engaging the second member to resist said separation, the second member comprising at least a metallic substrate,
- wherein:
- the first member is a main body of a can-type combustor and the joint is along an outboard face of the main body;
- the first member and the second member encircle an axis;
- there are a circumferential array of said first recesses;
- there are a circumferential array of said ceramic keys, each partially accommodated in a respective associated said first recess;
- said ceramic keys radially position the second member relative to the first member;
- and
- said ceramic keys are spring biased into engagement with the associated recesses.
Dependencies are inferred from the claim text.