Method of assembling a precured ring clamp assembly
AssigneeWestinghouse Electric Corp.
InventorsCharles M. Rowe, Hector O. Ponce, David H. Kistler
Life of this patent
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Abstract
A mechanical clamping assembly and method for clamping coils at stator end windings of large steam turbine generators is provided for generators of the type which inhibit access to at least one side of coils to be clamped. The apparatus includes a precured radial band clamp having an anchor assembly which can be latched into position from radially inward of the generator. The method includes forming the precured band clamp in attachment to the anchor assembly, inserting the clamp and anchor assembly into position in the generator, inserting a pin into the clamp at its radially inward end, pulling on the pin to tension the clamp and inserting shims under the pin to maintain the tension.
Claims6
A method for clamping top and bottom coils extending from slots in an electric generator stator core and arranged in an overlapping pattern forming a plurality of apertures between adjacent coils, a top ring positionable above the top coils, a ring shaped support cone positioned below the bottom coils, the support cone having an inside annular surface positioned against the bottom coil and including a hole through the inside annular surface, the top ring including at least one aperture aligned with an opening between phase groups, the hole being aligned with the opening, the method comprising the steps of:
- forming a resin impregnated radial band;
- twisting the radial band to form loops at each end thereof;
- precuring the radial band under tension;
- coupling one of the loops to an assembly;
- passing the anchor assembly between the coils and into the cone hole;
- securing the anchor assembly within the cone hole;
- aligning a top ring aperture with the cone hole;
- aligning a top ring aperture with the cone hole;
- passing another of the loops of the radial band through the ring aperture;
- and
- placing a pin through another of the loops to secure the precured radial band.
Dependencies are inferred from the claim text.