Component for a thermal machine, in particular a gas turbine

Patent metadata

Field	Value
Publication number	US-9777577-B2
Application number	US-201414445346-A
Country	US
Kind code	B2
Filing date	Jul 29, 2014
Priority date	Feb 17, 2012
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

The invention relates to a component for a thermal machine, in particular a gas turbine, which includes a corner and/or edge subjected to a thermally high load. The cooling of the component is improved in a manner such that at least one cooling channel is countersunk into the surface of the component in the immediate vicinity of the corner and/or edge in order to cool the corner and/or edge.

First claim

The invention claimed is:

1. A component for a thermal machine, comprising:
a corner or edge that is subjected to high thermal loading; and
at least one cooling channel recessed into the component from a surface of the component, the at least one cooling channel arranged in the direct vicinity of the corner or edge for cooling the corner or edge;
wherein the at least one cooling channel includes a cooling tube introduced into the at least one cooling channel and the cooling tube has an outlet configured to cool the surface of the component and an inlet.

2. The component as claimed in claim 1 , wherein the corner or edge extends along a preset line, and in that the at least one cooling channel runs substantially parallel to the corner or edge over a predetermined distance.

3. The component as claimed in claim 1 , comprising:
several cooling channels arranged in series in the direct vicinity of the corner or edge.

4. The component as claimed in claim 1 , comprising:
several parallel-running, recessed cooling channels arranged in the direct vicinity of the corner or edge.

5. The component as claimed in claim 4 , wherein the parallel-running cooling channels are arranged offset in relation to one another.

6. The component as claimed in claim 1 , wherein the cooling tube is respectively embedded in a filling material filling the at least cooling channel and is thereby thermally coupled to the surrounding material of the component.

7. The component as claimed in claim 1 , wherein the at least one cooling channel with the introduced cooling tube is closed with respect to the surface of the component.

8. The component as claimed in claim 7 , comprising:
a welded-on covering layer is provided for closing the at least one cooling channel.

9. The component as claimed in claim 1 , wherein the at least one cooling channel has a distance of its central axis from the surface of the component in the region of 1 mm.

10. The component as claimed in claim 9 , wherein the at least one cooling channel has an inside diameter in the region of approximately 1 mm.

11. The component as claimed in claim 1 , comprising:
a thermal barrier coating applied on the surface of the component.

12. The component as claimed in claim 1 , wherein it is formed as a blade of a gas turbine.

13. The component as claimed in claim 12 , wherein the blade is assembled from separate components, and the corner or edge to be cooled is formed at a transition between the separate components.

14. The component as claimed in claim 13 , wherein the corner or edge is bounded on one side by a gap that is subjected to hot gas.

15. A gas turbine including a component, the component comprising:
a corner or edge that is subjected to high thermal loading; and
at least one cooling channel recessed into the component from a surface of the component, the at least one cooling channel arranged in the direct vicinity of the corner or edge for cooling the corner or edge;
wherein the cooling channel includes a cooling tube introduced into the at least one cooling channel and the cooling tube has an outlet configured to cool the surface of the component and an inlet.

16. The component as claimed in claim 15 , wherein the corner or edge extends along a preset line, and in that the at least one cooling channel runs substantially parallel to the corner or edge over a predetermined distance.

17. The component as claimed in claim 15 , wherein the cooling tube is respectively embedded in a filling material filling the at least one cooling channel and is thereby thermally coupled to the surrounding material of the component.

18. The component as claimed in claim 15 , wherein the at least one cooling channel with the introduced cooling tube is closed with respect to the surface of the component.

19. The component as claimed in claim 15 , wherein the at least one cooling channel has an inside diameter in the region of approximately 1 mm.

20. The component as claimed in claim 15 , wherein the corner or edge is bounded on one side by a gap that is subjected to hot gas.

Assignees

• Alstom Technology Ltd
• Ansaldo Energia Ip Uk Ltd

Inventors

• Brandl Herbert
• Krueckels Joerg
• Reinert Felix

Classifications

• F05D2230/10

  by removing material · CPC title

• F05D2260/20

  Heat transfer, e.g. cooling · CPC title

• F01D5/085

  cooling fluid circulating inside the rotor · CPC title

• F01D25/12 Primary

  Cooling · CPC title

• F01D5/186

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