Combined rotary electrical contact and shaft seal system

Details Combined rotary electrical contact and shaft seal system Combined rotary electrical contact and shaft seal system

1977-10-27

1979-05-22

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310178, 310191, 31209, H02K 1312

Patent

active

041561554

ABSTRACT:
A combined rotary electrical contact and seal system for rotating machines, sing a liquid metal for electrical continuity and convertible labyrinth and rotating rubbing face seals to effect a nearly perfect seal system for the liquid metal, both while the machine is at rest and during rotation at normal operating speed. To avoid leakage of the liquid metal while the rotor is stopped or at low speeds, a face seal is effected by a slight axial movement of the rotor. As the rotational speed increases, the rubbing face seal becomes a labyrinth seal to avoid wear while maintaining an adequate seal. The liquid metal level is monitored and drains are provided to recover any leakage losses, and a replenishment system is provided to maintain the liquid metal at a proper level.

REFERENCES:
patent: 3312843 (1967-04-01), Krulls
patent: 3705995 (1972-12-01), Chabrerie et al.
patent: 3984715 (1976-10-01), Kullmann et al.
patent: 4047063 (1977-09-01), Reece

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