BUCKET ASSEMBLY FOR TURBINE SYSTEM

• US 20130115102A1
• Filed: 11/04/2011
• Published: 05/09/2013
• Est. Priority Date: 11/04/2011
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (GE Vernova, Inc.)
• Original Assignee: General Electric Company
• Inventors: Walunj, Jalindar Appa, Honkomp, Mark Steven
• Granted Patent: US 8,840,370 B2
• Time in Patent Office: Days
• US Class Current: 416/97.R
• CPC Class Codes: F01D 5/186 Film cooling F01D5/187 takes precedence
• CPC Class Codes: F01D 5/187 Convection cooling
• CPC Class Codes: F05D 2240/81 Cooled platforms

Abstract

A bucket assembly for a turbine system is disclosed. The bucket assembly includes a main body having an exterior surface and defining a main cooling circuit, and a platform surrounding the main body and at least partially defining a platform cooling circuit. The platform includes a forward portion and an aft portion each extending between a pressure side slash face and a suction side slash face. The platform further includes a forward face, an aft face, and a top face. The bucket assembly further includes a passage defined in the platform generally between the platform cooling circuit and the pressure side slash face and in fluid communication with one of the main cooling circuit or the platform cooling circuit.

Claims

1. A bucket assembly for a turbine system, comprising:

a main body having an exterior surface and defining a main cooling circuit;

a platform surrounding the main body and at least partially defining a platform cooling circuit, the platform comprising a forward portion and an aft portion each extending between a pressure side slash face and a suction side slash face and further comprising a forward face, an aft face, and a top face; and

a passage defined in the platform generally between the platform cooling circuit and the pressure side slash face and in fluid communication with one of the main cooling circuit or the platform cooling circuit.

2. The bucket assembly of claim 1, further comprising an impingement passage extending between and providing the fluid communication between the passage and the one of the main cooling circuit or the platform cooling circuit.

3. The bucket assembly of claim 1, wherein the passage is in fluid communication with the platform cooling circuit and the main cooling circuit.

4. The bucket assembly of claim 3, wherein an inlet of the passage is in fluid communication with the platform cooling circuit and an outlet of the passage is in fluid communication with the main cooling circuit.

5. The bucket assembly of claim 1, wherein the passage extends generally parallel to the pressure side slash face.

6. The bucket assembly of claim 1, further comprising an exhaust passage defined in the platform and in fluid communication with the passage.

7. The bucket assembly of claim 6, wherein an outlet of the exhaust passage is defined in the top face of the platform.

8. The bucket assembly of claim 6, wherein an outlet of the exhaust passage is defined in the suction side slash face of the platform.

9. The bucket assembly of claim 6, further comprising a plurality of exhaust passages.

10. The bucket assembly of claim 1, wherein the main body comprises an airfoil and a shank, the airfoil positioned radially outward from the shank.

11. A turbine system, comprising:

a compressor;

a turbine coupled to the compressor; and

a plurality of bucket assemblies disposed in at least one of the compressor or the turbine, at least one of the bucket assemblies comprising;

a main body having an exterior surface and defining a main cooling circuit;

a platform surrounding the main body and at least partially defining a platform cooling circuit, the platform comprising a forward portion and an aft portion each extending between a pressure side slash face and a suction side slash face and further comprising a forward face, an aft face, and a top face; and

a passage defined in the platform generally between the platform cooling circuit and the pressure side slash face and in fluid communication with one of the main cooling circuit or the platform cooling circuit.

12. The turbine system of claim 11, further comprising an impingement passage extending between and providing the fluid communication between the passage and the one of the main cooling circuit or the platform cooling circuit.

13. The turbine system of claim 11, wherein the passage is in fluid communication with the platform cooling circuit and the main cooling circuit.

14. The turbine system of claim 13, wherein an inlet of the passage is in fluid communication with the platform cooling circuit and an outlet of the passage is in fluid communication with the main cooling circuit.

15. The turbine system of claim 11, wherein the passage extends generally parallel to the pressure side slash face.

16. The turbine system of claim 11, further comprising an exhaust passage defined in the platform and in fluid communication with the passage.

17. The turbine system of claim 16, wherein an outlet of the exhaust passage is defined in the top face of the platform.

18. The turbine system of claim 16, wherein an outlet of the exhaust passage is defined in the suction side slash face of the platform.

19. The turbine system of claim 16, further comprising a plurality of exhaust passages.

20. The turbine system of claim 11, wherein the main body comprises an airfoil and a shank, the airfoil positioned radially outward from the shank.