초록 ▼

A trailing edge attachment for a composite turbine airfoil. The trailing edge attachment may include an attachment device for attaching the trailing edge attachment to the airfoil. The attachment device may include a plurality of pins extending through the attachment device and into the trailing ed

A trailing edge attachment for a composite turbine airfoil. The trailing edge attachment may include an attachment device for attaching the trailing edge attachment to the airfoil. The attachment device may include a plurality of pins extending through the attachment device and into the trailing edge blade. The trailing edge attachment may also include a spanwise cooling channel for feeding a plurality of cooling channels extending between a leading edge of the trailing edge attachment and a trailing edge of the attachment device. The attachment device may be configured to place the leading edge of the composite airfoil in compression, thereby increasing the strength of the composite airfoil.

대표청구항 ▼

I claim: 1. A trailing edge attachment for a turbine airfoil, comprising: a generally elongated body having a suction side surface adapted to be positioned flush with a suction side surface of a turbine airfoil, a pressure side surface adapted to be positioned flush with a pressure side surface of

I claim: 1. A trailing edge attachment for a turbine airfoil, comprising: a generally elongated body having a suction side surface adapted to be positioned flush with a suction side surface of a turbine airfoil, a pressure side surface adapted to be positioned flush with a pressure side surface of the turbine airfoil, and a leading edge of the body formed by an elongated spanwise cavity defining the leading edge of the body; and an attachment device adapted to attach the generally elongated body to the turbine airfoil, wherein the attachment device includes a plurality of pins that extend through portion of the generally elongated body and into the turbine airfoil; and wherein the elongated cavity is configured to receive at least a portion of the turbine airfoil such that the attachment device is adapted to contact the body through a flat surface. 2. The trailing edge attachment of claim 1, further comprising an attachment support that is configured to fit within a cavity in the turbine airfoil and proximate to an outer wall of the turbine airfoil and configured to receive the attachment device extending through the outer wall of the turbine airfoil. 3. The trailing edge attachment of claim 2, wherein said plurality of pins extends through the attachment support. 4. The trailing edge attachment of claim 3, wherein the plurality of pins are welded to the attachment support. 5. The trailing edge attachment of claim 2, wherein the attachment support has a generally U-shaped cross-section adapted to fit within the inner cavity in the turbine airfoil and in contact with the outer wall of the turbine airfoil proximate to a trailing edge of the turbine airfoil. 6. The trailing edge attachment of claim 5, wherein the turbine airfoil is formed from a composite airfoil having an inner core covered by a ceramic matrix composite, wherein the ceramic matrix composite extends from the inner core to form the inner cavity in the turbine airfoil at the trailing edge of the generally elongated body. 7. The trailing edge attachment of claim 1, further comprising a cooling system positioned in the generally elongated body. 8. The trailing edge attachment of claim 7, wherein the cooling system comprises a plurality of cooling channels extending from the leading edge of the generally elongated body to a trailing edge of the trailing edge attachment. 9. A trailing edge attachment for a turbine airfoil, comprising: a generally elongated body having a suction side surface and a pressure side surface; a suction side securement device positioned in the generally elongated body proximate to the suction side surface of the generally elongated body and adapted to receive an outer wall of the turbine airfoil forming a suction side surface of the turbine airfoil; a pressure side securement device positioned in the generally elongated body proximate to the pressure side surface of the generally elongated body and adapted to receive an outer wall of the turbine airfoil forming a pressure side surface of the turbine airfoil; and an attachment device adapted to attach the generally elongated body to the turbine airfoil. 10. The trailing edge attachment of claim 9, wherein the suction side securement device comprises a spanwise cavity extending chordwise into the generally elongated body, wherein a distance from the suction side surface of the airfoil to the pressure side surface of the airfoil is greater than a distance from an outermost inlet surface of the suction side securement device of the generally elongated body to an outermost inlet surface of the pressure side securement device of the generally elongated body. 11. The trailing edge attachment of claim 10, wherein the pressure side securement device comprises a spanwise cavity extending chordwise into the generally elongated body. 12. The trailing edge attachment of claim 9, wherein the pressure side securement device comprises a cavity extending into the generally elongated body, wherein a distance from the suction side surface of the airfoil to the pressure side surface of the airfoil is greater than a distance from an outermost inlet surface of the suction side securement device of the generally elongated body to an outermost inlet surface of the pressure side securement device of the generally elongated body. 13. The trailing edge attachment of claim 9, wherein the attachment device includes a plurality of pins that extend through a portion of the generally elongated body and into the turbine airfoil. 14. The trailing edge attachment of claim 9, further comprising a cooling system positioned in the generally elongated body. 15. The trailing edge attachment of claim 14, wherein the cooling system comprises a plurality of cooling channels extending from the leading edge of the generally elongated body to a trailing edge of the trailing edge attachment. 16. The trailing edge attachment of claim 9, wherein a leading edge of the generally elongated body includes an elongated cavity defining the leading edge of the body, wherein the elongated cavity is adapted to receive cooling fluids from the airfoil. 17. A method for attaching a trailing edge attachment to a composite turbine airfoil, comprising: providing a composite turbine airfoil having a leading edge, a pressure side surface, a suction side surface, and a trailing edge; providing a trailing edge attachment formed from a generally elongated body having a suction side surface adapted to be positioned flush with a suction side surface of a turbine airfoil, a pressure side surface adapted to be positioned flush with a pressure side surface of the turbine airfoil, a leading edge of the body formed by an elongated cavity defining the leading edge of the body, wherein the elongated spanwise cavity is configured to receive at least a portion of the turbine airfoil, and an attachment device adapted to attach the generally elongated body to the turbine airfoil; inserting the trailing edge of the composite turbine airfoil into the elongated cavity in the leading edge of the trailing edge attachment; and attaching the trailing edge attachment to the composite turbine airfoil. 18. The method of claim 17, wherein attaching the trailing edge attachment to the composite turbine airfoil comprises inserting a plurality of pins through the pressure side surface of the trailing edge and into the airfoil and inserting a plurality of pins through the suction side surface of the trailing edge and into the airfoil. 19. The method of claim 17, wherein attaching the trailing edge attachment to the composite turbine airfoil comprises inserting a plurality of pins through the pressure side surface of the trailing edge, into the airfoil, and into an attachment support positioned within a cavity in the turbine airfoil and proximate to an outer wall of the turbine airfoil, and inserting a plurality of pins through the suction side surface of the trailing edge, into the airfoil, and into the attachment support positioned within the cavity in the turbine airfoil and proximate to an outer wall of the turbine airfoil.