HEAT TRANSFER ENHANCEMENT OF VENTILATION CHIMNEYS FOR DYNAMOELECTRIC MACHINE ROTORS

HEAT TRANSFER ENHANCEMENT OF VENTILATION CHIMNEYS FOR DYNAMOELECTRIC MACHINE ROTORS

A cooling gas ventilation chimney is provided for an end region of a dynamoelectric machine having a rotor. A plurality of radial slots are provided in the rotor, and a plurality of coils are seated in the radial slots. The coils form radially stacked turns. The ventilation chimney includes one or m...

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Bibliographische Detailangaben
Hauptverfasser: JAREZYNSKI EMIL D, MANCUSO THOMAS, NOLD REBECCA A, KAMINSKI CHRISTOPHER A, SUGUITAN NORMAN J
Format: Patent
Sprache:eng
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Beschreibung
Zusammenfassung:A cooling gas ventilation chimney is provided for an end region of a dynamoelectric machine having a rotor. A plurality of radial slots are provided in the rotor, and a plurality of coils are seated in the radial slots. The coils form radially stacked turns. The ventilation chimney includes one or more chimney slots that are defined in at least a portion of the radially stacked turns. The chimney slots extend in a substantially radial direction to the rotor, and at least a portion of a surface of the chimney slots is turbulated so as to have a roughened surface profile for enhanced heat transfer.