Cooling of stator core flange

• US 8,901,790 B2
• Filed: 01/03/2012
• Issued: 12/02/2014
• Est. Priority Date: 01/03/2012
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Salamah, Samir Armando, Grant, James Jonathan, Kaminski, Christopher Anthony, Robin, Rebinth Jose, Tolpadi, Anil Kumar
• Primary Examiner(s): Leung, Quyen
• Assistant Examiner(s): Truong, Thomas
• Application Number:
  US13/342,840
• Publication Number:
  US 20130169080A1
• Time in Patent Office: 1,064 Days
• Field of Search: 310/52, 310/54, 310/58, 310/59
• US Class Current: 310/54
• CPC Class Codes: H02K 5/15 Mounting arrangements for bearing-shields or end plates
• CPC Class Codes: H02K 9/225 Heat pipes
• CPC Class Codes: H02K 9/227 Heat sinks
• CPC Class Codes: Y02E 20/14 Combined heat and power generation [CHP]

Abstract

An approach for cooling a stator core flange is provided. In one aspect, a pair of stator flanges each disposed at opposing ends of a stator core assembly maintains a compressive load on the stator core assembly. Heat transport tubes may be located about at least one of the stator flanges at an end of the stator core assembly to redistribute heat therefrom.

Claims

1. A turbine-driven generator, comprising:

a stator core assembly having an axially stacked array of metal laminations;

a pair of stator flanges each having an inner diameter and an outer diameter, each stator flange from the pair being disposed at opposing ends of the stator core assembly, the pair of stator flanges clamping the opposing ends of the stator core assembly to maintain a compressive load on the axially stacked array of laminations; and

a plurality of heat pipes and/or thermosyphons embedded in an internal volume of at least one of the stator flanges in cavities that extend from the inner diameter to the outer diameter to redistribute heat from the inner diameter to the outer diameter, the plurality of heat pipes and/or thermosyphons redistributing heat from the inner diameter to the outer diameter by evaporation, condensation, and mass transport of a fluid through a flow channel, wherein each heat pipe and/or thermosyphon has a two-phase flow of a working fluid present therein that includes a liquid phase and a vapor phase, wherein the liquid phase and the vapor phase present in the heat pipe and/or thermosyphon counter flow relative to each other.

2. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a spacing that is optimized to transport heat both with and against a force of gravity.

3. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes are arranged in the at least one stator flange with a uniform spacing.

4. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a non-uniform spacing.

5. The turbine-driven generator according to claim 4, wherein the plurality of heat pipes and/or thermosyphons concentrated near a bottom of the at least one stator flange are spaced closer together and heat pipes concentrated near a top of the at least one stator flange are spaced further apart, a spacing of the heat pipes increasing progressively from the bottom of the at least one stator flange to the top of the at least one stator flange.

6. The turbine-driven generator according to claim 5, wherein the heat pipes and/or thermosyphons concentrated near the bottom of the at least one stator flange are tilted with less tilt angle and the thermosyphons concentrated near the top of the at least one stator flange are tilted with more of a tilt angle, the degree of tilt of the thermosyphons increasing progressively from the bottom of the at least one stator flange to the top of the at least one stator flange.

7. The turbine-driven generator according to claim 4, wherein the plurality of heat pipes and/or thermosyphons are arranged to have varying degrees of tilt, wherein thermosyphons concentrated near a bottom of the at least one stator flange are spaced closer together and thermosyphons concentrated near a top of the at least one stator flange are spaced further apart, a spacing of the plurality of thermosyphons increasing progressively from the bottom of the at least one stator flange to the top of the at least one stator flange.

8. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in multiple regions of the at least one stator flange, the heat pipes being arranged with fixed spacing in each of the regions.

9. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a uniform spacing gradient of heat pipes.

10. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a non-uniform spacing gradient of heat pipes.

11. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a common nominal angle of tilt and an equal spacing therebetween.

12. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a common nominal angle of tilt and a varying range of spacing therebetween.

13. The turbine-driven generator according to claim 1, wherein the plurality of heat pipes and/or thermosyphons are arranged in the at least one stator flange with a varying angle of tilt and a varying range of spacing therebetween.

14. The turbine-driven generator according to claim 1, wherein the stator core assembly includes an outside space block assembly located about one of the stator flanges from the pair of stator flanges.

15. The turbine-driven generator according to claim 14, further comprising a plurality of heat pipes and/or thermosyphons embedded within the outside space block assembly.

16. The turbine-driven generator according to claim 1, further comprising at least one holding plate located about a surface that interfaces with an end of the stator core assembly.

17. The turbine-driven generator according to claim 16, wherein the at least one holding plate is configured to receive a plurality of heat pipes and/or thermosyphons.

18. The turbine-driven generator according to claim 1, further comprising at least one cooling jacket located at a surface that interfaces with an end of the stator core assembly.

19. The turbine-driven generator according to claim 18, wherein the at least one cooling jacket is configured to enhance heat transfer from a plurality of heat pipes and/or thermosyphons.