Dynamoelectric machine

Details Dynamoelectric machine Dynamoelectric machine

1986-12-29

1989-10-31

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310 52, 290 52, H02K 510

Patent

active

048779857

ABSTRACT:
In order to isolate a corrosive or reactive fluid in the interior of a dynamoelectric machine from contact with the stator assembly, while avoiding leakage or loss of the working fluid and avoiding contamination of the immediate surroundings and the working fluid in a closed cycle system, and ensuring maintenance-free operation for extended periods of time, the dynamoelectric machine includes a composite shielding member disposed between the stator and the rotor. The composite shielding member is formed of a non-conductive non-magnetic material at least in the region defined by the core of the stator and extending beyond the core at both ends thereof at least into the region defined by the winding of the stator. With this arrangement, the composite shielding member is formed of a non-porous ceramic material facing the rotor to prevent fluid migration therethrough and is also formed of a second material integral with the ceramic material for securing the composite shielding member in a fixed position to define a rotor cavity adapted to receive a fluid therewithin in a manner in which the core of the stator is isolated from the fluid in the rotor cavity.

REFERENCES:
patent: 1543502 (1925-06-01), Hobart
patent: 2919359 (1959-12-01), Luenberger
patent: 3192861 (1965-07-01), Haegh
patent: 3366813 (1968-01-01), Madsen
patent: 3609420 (1971-09-01), Isagaki et al.
patent: 3663848 (1972-05-01), Lehoczky
patent: 3688137 (1972-08-01), Filhol
patent: 3867658 (1975-02-01), Dochterman
patent: 4153868 (1979-05-01), Janotik
patent: 4227108 (1980-10-01), Washizu et al.
patent: 4394582 (1983-07-01), Kreissl
patent: 4492889 (1985-01-01), Fukushi et al.
patent: 4558228 (1985-12-01), Larjola

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