General Electric Company

Ronald Joseph Zawoysky

Alexander Gabriel Beckford

Gary Randall Barnes

Sairam Sundaram

Thomas Richard Blakelock

Leonard Paul Squillacioti

Robert Gerald Hamilton

Srikanth Akkaram

Mandar K Chati

A method to repair a rotor system having a coupling, a coupling keyway, a shaft, a shaft keyway, and a key. The method may include the steps of machining a shaft relief on the shaft adjacent to the coupling, providing fillet radii to the coupling keyway and the shaft keyway, adding a fretting resistant button to the key, machining a keyway relief on the shaft keyway, and machining a coupling relief on the coupling adjacent to the shaft. The method further may include the step of machining the key, the step of positioning dowels between the coupling and the shaft, and the step of shot-peening the coupling keyway and the shaft keyway.

Systems and methods for repairing a rotor system keyway

A method of repairing a crack in at least one side of a dovetail portion of a generator rotor coil slot wall, the dovetail portion having received at least two axially adjacent steel wedges and including at least a radial entry surface, an inwardly tapered surface and an intermediate radial surface, the method comprising a) machining a groove at least partly along the inwardly tapered surface to remove damaged material from the coil slot wall; and b) replacing the at least two axially adjacent steel wedges.

Generator rotor fretting fatigue crack repair

A generator has a bore connector having a threaded radial opening for receiving a sectional terminal stud. The terminal stud includes an adapter section having threads on a radial inner end thereof for threaded engagement with the bore copper and a recess at its opposite end. An outer section of the terminal stud is received in the recess, making electrical connection therewith through an electrical connector. The outer section is maintained in the radial bore of the rotor by a threaded nut. The rotational orientation of the adapter section is fixed by its threaded engagement with the bore copper, while the outer section can be inserted without regard to rotational orientation, thereby facilitating refurbishment of the generator without remachining the bore copper.

Apparatus and methods for providing an electrical connection between a bore copper and field windings of a dynamoelectric machine

Conformable distance blocks assemblies (24, 26) are provided for spacing adjacent end windings (20, 22) in a dynamoelectric machine. Each block assembly includes a pair of relatively hard blocks (28, 38) straddling a deformable spacer (32). The blocks and spacer are wrapped with an electrically insulating tape (34, 48) having an adhesive along an interior face for maintaining the blocks and spacer in assembled condition with a tab (36, 50) on the end of the tape. Generally rectilinear blocks (28) are employed for axial distance block assemblies, while the circumferential block assembly is comprised of tapered blocks (38) forming a wedge assembly. In installation, the assemblies are disposed between adjacent end windings, resiliently deforming the spacer, the tab being adhesively secured to the outermost lamination of the end windings. The spacer is also impregnated with a resin such that, upon curing, a rigid distance block assembly is provided to maintain adjacent end windings spaced from one another.

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Clifton Park, NY, United States of America

Ronald Joseph Zawoysky