Centering and safety device for rotors supported without contact

Details Centering and safety device for rotors supported without contact Centering and safety device for rotors supported without contact

1985-02-04

1986-12-16

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 91361, 251 3001, 384102, 384448, F16C 3906

Patent

active

046292616

ABSTRACT:
A safety and centering device for rotors suspended in contactless magnetic bearings, which provides almost instantaneous centering support for the rotor if the bearing magnets loose power. In a preferred embodiment, the rotor shaft has a collar with a conical friction surface, and a sleeve controlled by an electro magnet with counter-acting springs and also having a conical friction surface. In case of power failure the springs force the two surfaces together and provide centering support for the rotor. In another embodiment having a vertical rotor, the bearing magnets lift the rotor with the friction collar out of engagement with the matching stationary friction surface when the rotor is operating; but if the rotor bearings become de-energized the rotor drops with the collar falling into engagement with the matching friction surface.

REFERENCES:
patent: 2785023 (1957-03-01), Naumann
patent: 3556425 (1963-08-01), Carriere
patent: 3759588 (1973-09-01), Anderson
patent: 3779136 (1973-12-01), Hohlein
patent: 4043612 (1977-08-01), Orcutt
patent: 4260204 (1981-04-01), Hirt
patent: 4481451 (1984-11-01), Kautz
patent: 4541773 (1985-09-01), Drevet
patent: 4545409 (1985-10-01), Luhmer

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