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AssigneeGeneral Electric Company
InventorsPatricia Chapman Irwin, Peter John Foley, James Frederick Hopeck, Ronald Irving Longwell
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The main and collector terminal studs of a dynamoelectric machine are coated with a powder resin to form an electrical insulator between the rotor and the stud. The collector terminal stud includes a gasket which is compressed against the powder coating on the stud to form a seal with the powder coating preventing leakage of hydrogen gas through the seal. A fluidized bed containing the resin powder disperses the powder in a mist. By charging the powder, an electrostatic potential is provided between the stud and charged powder whereby the powder adheres to the stud. Alternatively, the stud will be preheated and dipped into a bed of powder whereby the powder adheres to the stud. The powder resin is subsequently cured.
In a hydrogen cooled dynamoelectric machine having a rotor, a radial bore in said rotor, a bore connector extending generally in an axial direction along a portion of the rotor and having a generally radially outwardly opening threaded aperture, a stud in said radial bore for electrically coupling said bore connector and electrical contacts carried by said rotor, said stud having a threaded connection at one end for threaded engagement with the bore connector in said threaded aperture thereof an electrical insulator about a portion of said stud for electrically insulating the stud and the rotor from one another, said insulator including a thermoset or thermoplastic powder resin coating on said insulator portion and a gasket in said bore sealing between the powder resin coating of the insulator and the bore thereby sealing between a hydrogen environment radially inwardly of the gasket and atmosphere radially outwardly of the gasket.
In a dynamoelectric machine having a rotor, a radial bore in said rotor, a bore connector extending generally in an axial direction along a portion of the rotor and having a generally radially outwardly opening threaded aperture, a stud in said radial bore for electrically coupling said bore connector and electrical contacts carried by said rotor, said stud having a threaded connection at one end for threaded engagement with the bore connector in said threaded aperture thereof, a method of applying a resin powder to a stud comprising the steps of:
Dependencies are inferred from the claim text.