Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1976-06-01
1977-08-02
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 55, H02K 906
Patent
active
040398722
ABSTRACT:
A reverse flow cooled dynamoelectric machine is provided with guide vanes and a guide vane mounting assembly comprising means for mounting and positioning the guide vanes, and means for directing the flow of cooling gas from the fan to the cooler. A fan nozzle ring is attached to the machine stator. An outer vane support ring is fixed to the fan nozzle ring and is provided with a circumferentially extending dovetail recess along its inner face. An inner vane support ring is spaced radially inwardly from the outer support ring and is also provided with a dovetail recess along its inner face. A plurality of guide vanes having inner and outer dovetail end portions mating with the dovetail recesses of the inner and outer support rings are held in place by the support rings. An annular rub strip is disposed adjacent to the outer support ring and is fixed to the fan nozzle ring. The rub strip includes a serrated inner face which, with the tips of the fan blades, produces a seal. A flow guide ring is provided adjacent the fan rub strip and acts to smoothly direct the flow of cooling gas away from the fan toward the cooler. The guide vanes and the mounting assembly are formed from electrically non-conducting materials to prevent induced heating of the assembly from stray flux at the end of the dynamoelectric machine.
REFERENCES:
patent: 2752515 (1956-06-01), Baudry
patent: 3265912 (1966-08-01), Baudry
patent: 3497737 (1970-02-01), Philofsky
Archibald James B.
Armor Anthony F.
Darby William L.
Ahern John F.
General Electric Company
Mitchell James W.
Skudy R.
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