Electrical Machine Including Axial Connector Assemblies and Related Methods

• US 20090261670A1
• Filed: 04/21/2008
• Published: 10/22/2009
• Est. Priority Date: 04/21/2008
• Status: Active Grant

• Current Assignee: Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Siemens Power Generation, Inc.
• Inventors: Tekawade, Avinash M.
• Granted Patent: US 7,732,972 B2
• Time in Patent Office: Days
• US Class Current: 310/71
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An electrical machine may include a plurality of stator coil ends each having a fluid passageway therein. The electrical machine may further include a plurality of rings and a plurality of axial connector assemblies for connecting the plurality of stator coil ends to the plurality of rings. Each axial connector assembly may include a header cap including an open end received on a respective stator coil end and a closed end opposite the open end, the closed end defining a coil spherical connector portion. The header cap may have a fluid port therein coupled to the fluid passageway of the respective stator coil end. A ring spherical connector portion may be carried by a respective ring, and a pair of connector members may receive therebetween the coil and ring spherical connector potions.

Claims

1. An electrical machine comprising:

a plurality of stator coil ends each having a fluid passageway therein;

a plurality of rings; and

a plurality of axial connector assemblies for connecting the plurality of stator coil ends to said plurality of rings, each axial connector assembly comprising

a header cap comprising an open end received on a respective stator coil end and a closed end opposite the open end, the closed end defining a coil spherical connector portion, and said header cap having a fluid port therein coupled to the fluid passageway of the respective stator coil end,

a ring spherical connector portion carried by a respective ring,

a pair of connector members receiving therebetween said coil and ring spherical connector potions.

2. The electrical machine according to claim 1 wherein said coil and ring spherical connector potions are aligned along an axis of the respective stator coil end.

3. The electrical machine according to claim 1 wherein said ring spherical connector portion is aligned along an axis of the respective stator coil end;

and wherein said coil spherical connector portion is offset from the axis.

4. The electrical machine according to claim 1 wherein said header cap further comprises an intermediate portion between the open end and the closed end;

and further comprising a fluid nipple extending outwardly from said intermediate portion and defining the fluid port.

5. The electrical machine according to claim 1 wherein each of said connector members has a pair of half-spherical recesses therein.

6. The electrical machine according to claim 1 wherein said pair of connector members has a plurality of aligned fastener receiving passageways therein.

7. The electrical machine according to claim 6 further comprising respective fasteners in the aligned fastener receiving passageways.

8. The electrical machine according to claim 1 wherein each axial connector assembly comprises copper.

9. An axial connector assembly for connecting a stator coil end to a ring of an electrical machine, each stator coil end having a fluid passageway therein, the axial connector assembly comprising:

a header cap comprising an open end to be received on the stator coil end and a closed end opposite the open end, the closed end defining a coil spherical connector portion, and said header cap having a fluid port therein to be coupled to the fluid passageway of the stator coil end;

a ring spherical connector portion to be carried by the ring; and

a pair of connector members to receive therebetween said coil and ring spherical connector potions.

10. The axial connector assembly according to claim 9 wherein said coil and ring spherical connector potions are to be aligned along an axis of the stator coil end.

11. The axial connector assembly according to claim 9 wherein said ring spherical connector portion is to be aligned along an axis of the stator coil end;

and wherein said coil spherical connector portion is offset from the axis.

12. The axial connector assembly according to claim 9 wherein said header cap further comprises an intermediate portion between the open end and the closed end;

and further comprising a fluid nipple extending outwardly from said intermediate portion and defining the fluid port.

13. The axial connector assembly according to claim 9 wherein each of said connector members has a pair of half-spherical recesses therein.

14. The axial connector assembly according to claim 9 wherein said pair of connector members has a plurality of aligned fastener receiving passageways therein;

and further comprising respective fasteners in the aligned fastener receiving passageways.

15. A method for axially connecting a stator coil end to a ring of an electrical machine, each stator coil end having a fluid passageway therein, the method comprising:

installing a header cap comprising an open end onto the stator coil end and a closed end opposite the open end, the closed end defining a coil spherical connector portion, and the header cap having a fluid port therein coupled to the fluid passageway of the stator coil end;

installing a ring spherical connector portion onto the ring; and

joining a pair of connector members together and receiving therebetween the coil and ring spherical connector potions.

16. The method according to claim 15 wherein the coil and ring spherical connector potions are aligned along an axis of the stator coil end.

17. The method according to claim 15 wherein the ring spherical connector portion is aligned along an axis of the stator coil end;

and wherein the coil spherical connector portion is offset from the axis.

18. The method according to claim 15 wherein the header cap further comprises an intermediate portion between the open end and the closed end;

and further comprising a fluid nipple extending outwardly from the intermediate portion and defining the fluid port; and

wherein the method further comprises coupling the fluid nipple to a fluid source.

19. The method according to claim 15 wherein each of the connector members has a pair of half-spherical recesses therein.

20. The method according to claim 15 wherein the pair of connector members has a plurality of aligned fastener receiving passageways therein;

and wherein joining the pair of connector members together comprises securing respective fasteners in the aligned fastener receiving passageways.