Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-11-16
1997-12-16
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 59, 310 60A, 310 61, 310 64, H02K 132, H02K 336
Patent
active
056989245
ABSTRACT:
A rotor for a dynamo-electric machine has a V-shaped groove for providing a fast gas stream with an outward speed component in the radial direction, the V-shaped groove being provided on the upstream side of the fast gas stream at an opening of a wedge exhaust hole. The dynamo-electric machine also has a sloping surface which is inclined with respect to the radial direction so that the exhaust stream coming out of the wedge exhaust hole is led in the direction of the fast gas stream, the sloping surface being provided on the downstream side of the fast gas stream at the wedge exhaust hole. This structure permits a smaller angle of the mergence of the fast gas stream and the exhaust stream and it accordingly reduces the pressure loss in the coolant gas at the outlet of the wedge exhaust hole, thus achieving reduced loss in the fan power. The result is higher operating efficiency of the rotor.
REFERENCES:
patent: 3596120 (1971-07-01), Potter
patent: 3781581 (1973-12-01), Lehuen et al.
patent: 4013908 (1977-03-01), Weghaupt
patent: 4152610 (1979-05-01), Wallenstein
patent: 4365177 (1982-12-01), Madsen
patent: 4748354 (1988-05-01), Toshima
Mitsubishi Denki & Kabushiki Kaisha
Nguyen Tran N.
Stephan Steven L.
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