Components with microchannel cooling

Patent metadata

Field	Value
Publication number	US-9249670-B2
Application number	US-201113326540-A
Country	US
Kind code	B2
Filing date	Dec 15, 2011
Priority date	Dec 15, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

A component includes a substrate having an outer surface, an inner surface and a tip. The inner surface defines at least one hollow, interior space. The outer surface defines one or more grooves, where each groove extends at least partially along the outer surface of the substrate and has a base. The component further includes a coating disposed over at least a portion of the outer surface of the substrate. The coating includes at least a structural coating that extends over the groove(s), such that the groove(s) and the structural coating together define one or more channels for cooling the component. The tip comprises a tip cap enclosing the hollow, interior space(s), and a tip rim disposed at a radially outer end of the substrate. The tip rim at least partially defines at least one discharge channel in fluid communication with at least one cooling channel.

First claim

The invention claimed is:

1. A component comprising:
a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the tip comprises a tip cap enclosing the at least one hollow, interior space and a tip rim disposed at a radially outer end of the substrate, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along the outer surface of the substrate and has a base; and
a coating disposed over the tip cap, the tip rim and at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating bonded to the substrate during disposing, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component,
wherein the tip rim at least partially defines at least one discharge channel that is in fluid communication with at least one cooling channel.

2. The component of claim 1 , wherein the component comprises a turbine airfoil, and wherein each hollow, interior space comprises a respective segment of at least one flow channel.

3. The component of claim 1 , wherein the substrate further defines at least one access channel that extends between and provides fluid communication between a respective hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel.

4. The component of claim 3 , wherein each discharge channel intersects the respective cooling channel.

5. The component of claim 1 , wherein the substrate defines a pressure sidewall and a suction sidewall, wherein the pressure and suction sidewalls are joined together at a leading edge and at a trailing edge of the component and extend from a root of the component to the tip of the component, wherein the channels extend at least partially along at least one of the pressure and suction sidewalls.

6. The component of claim 1 , wherein each cooling channel extends at least partially along the tip cap.

7. The component of claim 6 , wherein the tip cap defines at least one access channel that extends between and provides fluid communication between at least one hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel.

8. The component of claim 1 , wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped groove, such that each cooling channel comprises a re-entrant shaped cooling channel.

9. The component of claim 1 , wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove.

10. The component of claim 1 , wherein the structural coating seals each groove.

11. A component comprising:
a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the tip comprises a tip cap enclosing the at least one hollow, interior space and a tip rim disposed at a radially outer end of the substrate, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along an outer surface of the tip cap and has a base; and
a coating disposed over the tip rim, the tip cap and at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating bonded to the substrate during disposing, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component,
wherein each cooling channel extends at least partially along the tip cap.

12. The component of claim 11 , wherein the tip cap defines at least one access channel that extends between and provides fluid communication between at least one hollow, interior space and at least one cooling channel, wherein the respective access channel intersects the base of the respective cooling channel.

13. The component of claim 12 , wherein the substrate defines at least one discharge channel that extends below the tip rim and is in fluid communication with at least one cooling channel.

14. The component of claim 11 , wherein the substrate defines a pressure sidewall and a suction sidewall, wherein the pressure and suction sidewalls are joined together at a leading edge and at a trailing edge of the component and extend from a root of the component to the tip of the component,
wherein the tip cap has a sloped radially outer end, and wherein the tip cap defines at least one discharge hole that extends between a respective cooling channel and one of the pressure or suction sidewalls.

15. The component of claim 11 , wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped, such that each cooling channel comprises a re-entrant shaped cooling channel.

16. The component of claim 11 , wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove.

17. The component of claim 11 , wherein the structural coating seals each groove.

18. A component comprising:
a substrate comprising an outer surface, an inner surface and a tip, wherein the inner surface defines at least one hollow, interior space, wherein the tip defines a tip cap enclosing the at least one hollow, interior space and a tip rim disposed at a radially outer end of the substrate, wherein the outer surface defines one or more grooves, and wherein each groove extends at least partially along the outer surface of the substrate and has a base; and
a coating disposed over the tip cap, the tip rim and at least a portion of the outer surface of the substrate, wherein the coating comprises at least a structural coating bonded to the substrate during disposing and comprises one of a nickel-based alloy or a cobalt-based alloy, wherein the structural coating extends over the one or more grooves, such that the one or more grooves and the structural coating together define one or more channels for cooling the component,
wherein each cooling channel extends at least partially along the tip rim.

19. The component of claim 18 , wherein each cooling channel extends along the length of the tip rim.

20. The component of claim 18 , wherein each cooling channel extends only partially along the length of the tip rim.

21. The component of claim 18 , wherein each groove has an opening, and wherein each groove narrows at the opening of the groove and thus comprises a re-entrant shaped groove, such that each cooling channel comprises a re-entrant shaped cooling channel.

22. The component of claim 18 , wherein the structural coating defines one or more permeable slots, such that the structural coating does not completely bridge each groove.

23. The component of claim 18 , wherein the structural coating seals each groove.

24. The component of claim 18 , wherein the component comprises a turbine airfoil, and wherein each hollow, interior space comprises a respective segment of at least one flow channel.

25. The component of claim 18 , wherein the substrate

Assignees

• Bunker Ronald Scott
• Gen Electric

Inventors

• Bunker Ronald Scott

Classifications

• Y02T50/673

  Cross-Sectional Technologies · mapped topic

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• F01D5/186 Primary

  Film cooling (F01D5/187 takes precedence) · CPC title

• F01D5/288

  Protective coatings for blades · CPC title

• F01D5/20

  Specially-shaped blade tips to seal space between tips and stator {(F01D5/225 takes precedence)} · CPC title