Cryogenic fluid transfer joint employing gaseous seals

Details Cryogenic fluid transfer joint employing gaseous seals Cryogenic fluid transfer joint employing gaseous seals

1975-04-30

1977-04-19

O'Dea, William F.

Refrigeration

Low pressure cold trap process and apparatus

62505, 277 15, 285 47, 285DIG5, 310 54, 310 61, F17C 702

Patent

active

040180590

ABSTRACT:
Cryogenic liquid coolant is transferred from a stationary liquefier through a bayonet to the rotor of a superconducting generator using a cryogenic fluid transfer joint cantilevered on the collector end of the rotor. Pressure of the boil-off coolant is employed to prevent the liquid coolant from entering a relative-motion gap about the bayonet, while the boil-off coolant flows through the gap to reduce heating of the bayonet. Flow of noncryogenic gas is used to regulate flow of the boil-off coolant and to minimize contamination of the coolant by bearing lubricant.

REFERENCES:
patent: 3626717 (1971-12-01), Lorch
patent: 3731865 (1973-05-01), Wood
patent: 3831381 (1974-08-01), Swearingen
patent: 3845639 (1974-11-01), Smith, Jr. et al.
patent: 3922573 (1975-11-01), Pluske
A. Bejan, M.I.T. PhD. Thesis, Improved Thermal Design of the Cryogenic Cooling System for a Superconducting Synchronous Generator, Dec. 20, 1974 pp. 148-155, 165, 167.

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