Compact pin attachment for CMC components
A component assembly includes a first component that has a first hole. The first hole has a non-circular cross section. A first portion of the first hole has a first radius of curvature and a second component. A pin extends from the second component and through the first hole. The pin has a non-circular cross section. A second portion of the pin has a second radius of curvature. The first radius of curvature and the second radius of curvature are substantially the same.
1. A component assembly, comprising:
a first component having a first hole, the first hole having a non-circular cross section, a first portion of the first hole having a first radius of curvature;
a second component; and
a pin extending from the second component and through the first hole, the pin having a non-circular cross section, and a second portion of the pin having a second radius of curvature, the first radius of curvature and the second radius of curvature are substantially the same.
2. The component assembly of claim 1 , wherein the first radius of curvature is within 0.005 inches (0.127 mm) of the second radius of curvature.
3. The component assembly of claim 1 , wherein the first component is a ceramic material.
4. The component assembly of claim 1 , wherein the second component has a second hole and the pin extends through the first hole and the second hole.
5. The component assembly of claim 1 , wherein the pin and the first hole have substantially D-shaped cross-sections.
6. The component assembly of claim 1 , wherein the second portion of the pin is configured to contact the first portion of the first hole.
7. The component assembly of claim 1 , wherein the pin has a substantially flat portion opposite the first portion.
8. The component assembly of claim 7 , wherein the substantially flat portion is spaced from the first hole to provide a clearance between the pin and the first hole.
9. The component assembly of claim 1 , wherein the pin has a surface that is configured to contact the first hole at a location outside of the first portion.
10. The component assembly of claim 1 , wherein the pin is at least partially hollow.
11. The component assembly of claim 1 , wherein the pin has a cross-section that is substantially symmetric about a plane.
12. The component assembly of claim 1 , wherein the pin is a metallic material.
13. The component assembly of claim 1 , wherein the second component is one of a blade outer air seal, a combustor liner, a transition duct, an exhaust nozzle panel, and an airfoil platform.
14. A section of a gas turbine engine, comprising:
a first component formed from a ceramic material and having a first hole, the first hole having a non-circular cross section, a first portion of the first hole having a first radius of curvature;
a second component statically mounted within the gas turbine engine; and
a pin extending from the second component and through the first hole, the pin having a non-circular cross section, and a second portion of the pin having a second radius of curvature, the first radius of curvature and the second radius of curvature are substantially the same.
15. The section of a gas turbine engine of claim 14 , wherein the first radius of curvature is within 0.005 inches (0.127 mm) of the second radius of curvature.
16. The section of a gas turbine engine of claim 14 , wherein the pin has a substantially flat portion opposite the second portion, and the substantially flat portion is spaced from the first hole to provide a clearance between the pin and the first hole.
17. The section of a gas turbine engine of claim 14 , wherein the pin and the first hole have substantially D-shaped cross-sections.
18. The section of a gas turbine engine of claim 14 , wherein the second portion of the pin is configured to contact the first portion of the first hole.
19. A blade outer air seal assembly, comprising:
a carrier having a first aperture and a second aperture;
a blade outer air seal having at least one segment mounted in the carrier, the at least one segment having a first wall having a first hole and a second hole; and
a pin extending through the first aperture and through the first hole, the pin having a non-circular cross-section; and
a second pin extends through the second aperture and the second hole, wherein the second aperture has a different cross section from the first aperture.
20. The blade outer air seal assembly of claim 19 , wherein the pin and the first hole have substantially D-shaped cross-sections.