A system for attaching a ring seal to a vane carrier in a turbine engine can allow the ring seal to radially expand and contract at least partially independently of the vane carrier. The system can also be configured to substantially restrict axial and/or circumferential movement of the ring seal. I
A system for attaching a ring seal to a vane carrier in a turbine engine can allow the ring seal to radially expand and contract at least partially independently of the vane carrier. The system can also be configured to substantially restrict axial and/or circumferential movement of the ring seal. In one embodiment, the ring seal can include a plurality of radial slots circumferentially spaced about the ring seal. A pin can extend substantially through each of the slots and into operative engagement with isolation rings, which are connected to the vane carrier. In another embodiment, the ring seal and the isolation rings can include a series of axially-extending protrusions extending substantially circumferentially about each component. The protrusions on the ring seal can substantially matingly engage the protrusions on the isolation rings. The protrusions can be configured as a Hirth coupling.
대표청구항▼
What is claimed is: 1. An attachment system comprising: a vane carrier having an inner peripheral surface; a forward isolation ring and an aft isolation ring spaced axially downstream of the forward isolation ring, wherein the isolation rings are attached to the vane carrier such that the isolation
What is claimed is: 1. An attachment system comprising: a vane carrier having an inner peripheral surface; a forward isolation ring and an aft isolation ring spaced axially downstream of the forward isolation ring, wherein the isolation rings are attached to the vane carrier such that the isolation rings extend substantially circumferentially about and substantially radially inward from the inner peripheral surface of the vane carrier; a ring seal having a radially outermost periphery and a radially innermost periphery, the ring seal having a plurality of substantially circumferentially spaced slots, wherein the slots extend substantially axially through the ring seal, wherein each slot opens to a surface of the radially outermost periphery of the ring seal and extends radially inward therefrom; and a plurality of pins, wherein each of the plurality of pins substantially passes through a respective slot in the ring seal and operatively engages the forward and aft isolation rings, whereby the ring seal is structurally connected to the vane carrier by the isolation rings and the pins so that axial and circumferential movement of the ring seal is substantially restricted while relative radial movement between the ring seal and the vane carrier is permitted. 2. The system of claim 1 wherein at least one of the slots and the pins is at least partially coated with a wear resistant material. 3. The system of claim 1 wherein each of the isolation rings includes a plurality of circumferentially spaced holes, wherein the holes in the forward isolation ring are substantially aligned with the holes in the aft isolation ring, wherein the ring seal is positioned such that each slot is substantially aligned with a pair of aligned holes in the isolation rings, and wherein each pin is received within the aligned holes of the isolation rings. 4. The system of claim 1 wherein the ring seal includes a forward span, an aft span and an axial extension connecting the forward and aft spans, and wherein the axial extension defines at least a part of the radially innermost periphery of the ring seal, wherein the forward span, the aft span and the axial extension collectively form a substantially U-shaped cross-section that opens in a generally radially outward direction toward the vane carrier. 5. The system of claim 4 wherein each of the isolation rings includes an axial upstream surface and an axial downstream surface, and each of the spans of the ring seal includes an axial forward surface and an axial aft surface, the ring seal being positioned such that the downstream surface of the forward isolation ring opposes the forward surface of the forward span, and such that the aft surface of the aft span opposes the upstream surface of the aft isolation ring, and wherein each pin includes a first end with a head and a second end, wherein the head of each pin operatively engages one of the aft face of the aft isolation ring and the forward face of the forward isolation ring, and wherein the second end of the pin is operatively connected to the other of the forward isolation ring and the aft isolation ring. 6. The system of claim 4 wherein each of the isolation rings includes a forward face and an aft face, and each of the spans of the ring seal includes a forward face and an aft face, the ring seal being positioned such that the forward face of the forward span opposes the aft face of the forward isolation ring, and such that the forward face of the aft span opposes the aft face of the aft isolation ring, and wherein each pin includes a first end with a head and a second end, wherein the head of each pin operatively engages the aft face of the aft span and the second end of the pin is operatively connected to the forward isolation ring. 7. The system of claim 4 wherein each of the isolation rings includes a forward face and an aft face, and each of the spans of the ring seal includes a forward face and an aft face, the ring seal being positioned such that the aft face of the forward span opposes the forward face of the forward isolation ring, and such that the aft face of the aft span opposes the forward face of the aft isolation ring, and wherein each pin includes a first end with a head and a second end, wherein the head of each pin operatively engages the aft face of the aft isolation ring, and wherein the second end of the pin extends through the forward isolation ring and at least partly into one of the slots in the ring seal. 8. The system of claim 1 wherein the ring seal and the vane carrier are each made of a material with an associated coefficient of thermal expansion, wherein the coefficient of thermal expansion of the ring seal is less than the coefficient of thermal expansion of the vane carrier. 9. The system of claim 1 wherein the ring seal is made of ceramic. 10. An attachment system comprising: a vane carrier, wherein the vane carrier has an inner peripheral surface; a forward isolation ring and an aft isolation ring spaced axially downstream of the forward isolation ring, wherein the isolation rings are attached to the vane carrier such that the isolation rings extend substantially circumferentially about and radially inward from the inner peripheral surface of the vane carrier, wherein a plurality of protrusions extend substantially axially from and substantially circumferentially about each of the isolation rings; a ring seal enclosed within the vane carrier, the ring seal having an axial forward side and an axial aft side, and wherein a plurality of protrusions extend substantially axially from and substantially circumferentially about each axial side of the ring seal, wherein the ring seal is operatively connected to the vane carrier such that the protrusions on the axial forward side of the ring seal substantially matingly engage the protrusions on the forward isolation ring, and wherein the protrusions on the axial aft side of the ring seal substantially matingly engage the protrusions on the aft isolation ring, whereby the vane carrier and the ring seal move at least partially independent of each other in the radial direction. 11. The system of claim 10 wherein at least one of axial movement and circumferential movement of the ring seal is substantially restricted. 12. The system of claim 10 wherein the ring seal is made of ceramic. 13. The system of claim 10 wherein the ring seal and the vane carrier are each made of a material with an associated coefficient of thermal expansion, wherein the coefficient of thermal expansion of the ring seal is less than the coefficient of thermal expansion of the vane carrier. 14. The system of claim 10 wherein the substantially matingly engaging protrusions of the ring seal and the isolation rings are configured as a Hirth coupling. 15. The system of claim 10 wherein the isolation rings are adapted to apply a clamping force on the ring seal. 16. The system of claim 10 wherein each of the forward and aft isolation rings includes a front face and an aft face, wherein the plurality of protrusions are provided on the aft face of the forward isolation ring and the front face of the aft isolation ring.
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