Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-05-09
1997-06-03
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 58, 310 59, H02K 900
Patent
active
056357796
ABSTRACT:
In gas-cooled electrical machine with an axial fan (9) at one shaft end and with a rotor (1) and a stator body surrounded by a machine housing (14), a gas-guide device (18) arranged coaxially to the rotor shaft is provided in the outflow space (17) of the axial fan (9), out of which gas-guide device the cooling gas conveyed by the axial fan is fed to the rotor and to the stator body and stator winding. Said gas-guide device (18) comprises a plurality of guide rings (19-25) in the form of a cone envelope and spaced radially from one another and a ring part (27) likewise in the form of a cone envelope, which rings and ring part are connected to one another and to the machine housing (14) directly, or indirectly by means of bars (28, 29) extending essentially radially and/or guide plates (36, 36'). Ring-shaped channels (K.sub.1, . . . , K.sub.8) widening continuously in the direction of flow of the cooling gas are formed between respective radially adjacent guide rings, and between the ring part (27) and its adjacent guide ring.
The gas-guide device (18) brings about a pressure transition, and it reduces the outlet losses downstream of the latter in relation to the hitherto conventional axial outlet provided by the rotor configuration. Between 15% and 25% of the pressure losses in the machine can be saved in this way and consequently the cooling effect can be greatly increased.
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patent: 4827166 (1989-05-01), Morrill
patent: 4859887 (1989-08-01), Carlsson et al.
patent: 4959571 (1990-09-01), Yasumoto et al.
patent: 5243244 (1993-09-01), Kasberger et al.
patent: 5296769 (1994-03-01), Havens et al.
patent: 5394041 (1995-02-01), Oberdorfer-Bogel
Baer Jurgen
Zimmermann Hans
Asea Brown Boveri AG
Stephan Steven L.
Wallace, Jr. Michael
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