Method and apparatus for insulating liquid-cooled stator coil headers and connectors

• US 4,982,122 A
• Filed: 04/12/1989
• Issued: 01/01/1991
• Est. Priority Date: 05/23/1988
• Status: Expired due to Term

• Current Assignee: Siemens Power Generation, Inc.
• Original Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Inventors: Ponce, Hector O., Rowe, Charles M., Fort, Emil M., Simmonds, Leonard B.
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): JONES, JUDSON
• Application Number:
  US07/338,354
• Time in Patent Office: 629 Days
• Field of Search: 310/43, 310/54, 310/260
• US Class Current: 310/54
• CPC Class Codes: H02K 15/0093 Manufacturing or repairing cooling fluid boxes, i.e. terminals of fluid cooled windings ensuring both electrical and fluid connection
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence

Abstract

An improved method and apparatus for preventing electrical shorts between sets of stator coil headers and accompanying connections is disclosed in which a reinforced, non-conducting cover is fitted over a pair of stator coil headers, or a stator coil header and an adjacent phase connector. Thereafter, the cavity formed by the fitted cover can be filled with an insulating, solidifying or polymerizing material or resin. Use of such an apparatus insulates the entire header apparatus and prevents any accidental shorting between sets of stator coil ends.

Claims

1. An apparatus for preventing electrical shorts between sets of stator coil water-cooling headers having associated connections comprising:

an open-ended, tubular insulating cover having a substantially constant cross-section fitted over a pair of stator coil headers having an associated connection wherein the cover extends over the stator coil headers and associated connections.

2. The apparatus of claim 1 wherein the fitted cover is filled with an insulating, solidifying or polymerizing material or resin.

3. The apparatus of claim 1 wherein the insulating cover is comprised of reinforced composite.

4. The apparatus of claim 1 wherein the insulating cover is used to insulate stator coils connected in phase with other stator coils by having a portion of a wall of said insulating cover removed to allow a phase connector to pass through said wall of said insulating cover.

5. The apparatus of claim 1 wherein the insulating cover has sides that are adjustable in length so that the insulating cover can be tightly fitted around said pair of stator coil ends.

6. A generator with a plurality of water-cooled stator coils wherein pairs of said stator coils are connected by a connector and are insulated from other pairs of said stator coils by an open-ended, tubular insulating cover having a substantially constant cross-section that is fitted over a pair of said stator coils and extends over said stator coil connectors.

7. The generator of claim 6 wherein the fitted covers are filled with an insulating material or resin.

8. The generator of claim 6 wherein the fitted covers are comprised of reinforced composite.

9. The generator of claim 6 wherein the insulating cover is used to insulate stator coils connected in phase with other stator coils by having a portion of a wall of said insulating cover removed to allow a phase connector to pass through said wall of said insulating cover.

10. The generator of claim 6 wherein the insulating cover has sides that are adjustable in length so that the insulating cover can be tightly fitted around said pair of stator coil ends.

11. A method of insulating stator coil headers wherein pairs of said stator coil headers are connected by a connector comprising:

insulating a pair of stator coil headers from other pairs of said stator coil headers by fitting an open-ended, tubular insulating cover having a substantially constant cross-section over a pair of said stator coil headers prior to connecting said stator coil headers to a main water manifold wherein said insulating cover extends over said stator coil connector.

12. The method of claim 11 wherein the fitted cover is filled with an insulating material or resin after being fitted over said stator coil headers.

13. The method of claim 11 wherein the fitted cover is comprised of reinforced composite.

14. The method of claim 11 wherein the insulating cover is used to insulate stator coils connected in phase with other stator coils by removing a portion of a wall of said insulating cover to allow a phase connector to pass through said wall of said insulating cover.

15. The method of claim 11 wherein the insulating cover has sides that are adjustable in length and the insulating cover is tightly fitted around said pair of stator coil ends.

16. An apparatus for preventing electrical shorts between sets of stator coil water-cooling headers having associated connections comprising:

an open-ended, tubular insulating cover comprised of reinforced composite and having a substantially constant cross-section wherein the insulating cover has sides that adjustable in length;

the insulating cover fitted over a pair of stator coil headers having an associated connection wherein the cover extends over the stator coil headers and associated connections; and

an insulating, solidifying or polymerizing material or resin filling said fitted cover.