Metal working – Method of mechanical manufacture – Electrical device making
Patent
1996-11-14
1999-03-02
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29598, 294024, 2940218, 228119, 310 42, 310 43, 310 54, 310 64, 310 65, H02K 1500
Patent
active
058755390
ABSTRACT:
A process for repairing leaks in turbine generators that have water cooled stator coils with hollow conductor strands, wherein the lead ends of the conductor strands are joined to a header. First a vacuum enclosure is provided around a portion of one of the stator coils in proximity to the header. Then a vacuum is applied to the portion. Finally, a resin is injected into voids in the portion. In a second embodiment, the header first is cut into an outboard section, and into an inboard section that remains attached to the conductor strands. Then the exposed lead ends of the conductor strands and the attached inboard section are cleaned to remove oxidation. Next, a water-tight braze seal is applied over the lead ends of the conductor strands. Then the stator coil and the inboard section are joined to a new outboard section and a vacuum is subsequently applied to the inboard section. The resin is then injected into voids in the inboard section.
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Taillon, J. et al., "In Place Brazing Solution To Liquid Cooled Stator Winding Leaks", Mechanical Dynamics and Analysis, Inc., Schnectady, NY.
Comprehensive Waterclip Solution, ABB Power Generation, Inc., Richmond, VA.
Dailey George Franklin
Kilpatrick Neil Leslie
Hall Carl E.
Siemens Westinghouse Power Corporation
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