Cryogenic fluid transfer joint employing a stepped bayonet relat

Details Cryogenic fluid transfer joint employing a stepped bayonet relat Cryogenic fluid transfer joint employing a stepped bayonet relat

1975-04-30

1976-11-16

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

039915883

ABSTRACT:
Cryogenic liquid coolant is transferred from a stationary liquefier through a bayonet to a conduit rotating with the rotor of a superconducting generator, using a cryogenic fluid transfer joint attached to the collector end of the rotor. A relative-motion gap about the bayonet has its inner and outer diameters reduced in size near the outlet end of the bayonet. The gap thus stepped downward in size extends into a core of boil-off coolant within the rotating conduit, preventing liquid coolant centrifugally forced against the inside of the conduit from entering the gap, and allowing only boil-off coolant to enter.

REFERENCES:
patent: 3626717 (1971-12-01), Lorch
patent: 3775989 (1973-12-01), Mursinna
patent: 3823569 (1974-07-01), Sellmaier et al.
patent: 3845639 (1974-11-01), Smith, Jr. et al.
A. Bejan, M.I.T. Ph.D. 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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