Turbine component and methods of assembling the same

Patent metadata

Field	Value
Publication number	US-9394796-B2
Application number	US-201313940806-A
Country	US
Kind code	B2
Filing date	Jul 12, 2013
Priority date	Jul 12, 2013
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A turbine component is provided. The turbine component includes an airfoil having a first surface and a second surface. A thermal barrier coating is coupled to the second surface, wherein the thermal barrier coating includes a first portion, a second portion and a trench defined between the first and second portions. A channel is coupled in flow communication to the first surface and the trench, wherein the channel includes a first sidewall and a second sidewall opposite of the first sidewall. The first and second sidewalls extend from the first surface and toward the trench at an angle. The turbine component includes a cover coupled to the second surface, wherein the cover includes a first end coupled to the first portion and a second end extending into the trench and spaced from the second portion.

First claim

What is claimed is:

1. A turbine component comprising:
an airfoil comprising a first surface and a second surface;
a thermal barrier coating coupled to said second surface and comprising a first portion, a second portion and a trench defined between said first and second portions;
a channel coupled in flow communication to said first surface and said trench, said channel comprising a first sidewall and a second sidewall opposite of said first sidewall, said first and second sidewalls extending from said first surface and toward said trench at an angle; and
a cover coupled to said second surface and comprising a first end coupled to said first portion and a second end extending into said trench and spaced from said second portion.

2. The turbine component of claim 1 , wherein said first portion comprises a straight end and said second portion comprises an angled end.

3. The turbine component of claim 1 , wherein said first portion comprises a straight end and said second portion comprises an angled end that is substantially aligned with said second sidewall.

4. The turbine component of claim 3 , wherein said angle of said angled end and second sidewall is less than about 90 degrees.

5. The turbine component of claim 1 , wherein said first end comprises a straight surface and said second end comprises an angled surface.

6. The turbine component of claim 1 , wherein said second end comprises an angled surface that is substantially aligned with said first sidewall.

7. The turbine component of claim 1 , wherein said cover comprises a substantially uniform thickness from said first end to said second end.

8. The turbine component of claim 1 , wherein said cover comprises a non-uniform thickness from said first end to said second end.

9. The turbine component of claim 1 , wherein said second end is substantially straight.

10. The turbine component of claim 1 , wherein said cover comprises a pre-sintered preform.

11. The turbine component of claim 1 , further comprising a brazed fastener coupled to said second surface and to said cover.

12. A cover coupled to an airfoil and positioned within a trench to direct medium flow from an angled channel and along the airfoil, said cover comprising:
a first end coupled to the airfoil;
a second end coupled to said first end and configured to extend into the trench, said second end comprising an angled surface that is aligned with the angled channel; and
a brazed fastener coupled to said first and second ends and to said airfoil, wherein said cover comprises a plurality of column members.

13. The cover of claim 12 , wherein said first and second ends comprise a pre-sintered pre-form.

14. A method of manufacturing a turbine component, said method comprising:
forming an angled channel through at least one of a first surface and a second surface of a substrate;
forming a cover comprising a first end and a second end;
coupling the cover to the first surface;
extending the cover beyond the angled channel and aligning the second end with the angled channel;
applying a mask to the first surface and the cover to cover the angled channel;
applying a thermal barrier coating to the first surface; and
forming a trench through the thermal barrier coating and in flow communication with the angled channel.

15. The method of claim 14 , wherein forming the trench comprises forming a first portion of the thermal barrier coating and a second portion of the thermal barrier coating and spaced from the first portion.

16. The method of claim 15 , further comprising forming an angled surface into the second portion.

17. The method of claim 14 , wherein forming the cover comprises forming a straight surface into the first end and an angled surface into the second end.

18. The method of claim 14 , wherein coupling the cover to the first surface comprises brazing the cover to the first surface.

19. The method of claim 14 , further comprising removing the mask to expose the angled channel.

Assignees

• Gen Electric

Inventors

• Lacy Benjamin Paul
• Brzek Brian Gene
• Kottilingam Srikanth Chandrudu
• Schick David Edward

Classifications

• F01D25/145

  Thermally insulated casings · CPC title

• B23P15/04

  turbine or like blades from several pieces · CPC title

• F01D5/186 Primary

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

• F05D2260/202

  by film cooling · CPC title

• B23P2700/06

  Cooling passages of turbine components, e.g. unblocking or preventing blocking of cooling passages of turbine components · CPC title