Liquid helium pump

Details Liquid helium pump Liquid helium pump

1980-12-15

1982-12-28

Freeh, William L.

Pumps

Motor driven

Electric or magnetic motor

310 15, 417419, 417472, F04B 4500

Patent

active

043659420

ABSTRACT:
A pump includes a pump housing defining a pumping chamber and having two opposite end walls and a piston arranged in the pumping chamber for alternating motion towards and away from the end walls for drawing a cryogenic liquid into and driving it out of the pumping chamber. There are further provided first and second superconducting energizing coils mounted on respective end walls for generating a radial electromagnetic field in the pumping chamber. The energizing coils are coaxial with the piston axis. A superconducting control coil is fixedly mounted on the piston for generating a further magnetic field in the pumping chamber. The control coil is coaxial with the piston axis. The energizing coils and the control coil form part of an electromagnetic drive for generating, in the pumping chamber, an electromagnetic force which propels the piston back and forth between the end walls. Further, a bellows is affixed to peripheral regions of the piston and to the end walls for enclosing the pumping chamber.

REFERENCES:
patent: 1572126 (1926-02-01), Bothner
patent: 2061869 (1936-11-01), Gilbert et al.
patent: 2951450 (1960-09-01), Fisher
patent: 3422765 (1969-01-01), Schoch
patent: 3867675 (1975-02-01), Kitz et al.
"A Reciprocating Liquid Helium Pump Used for Forced Flow of Supercritical Helium" by G. Krafft et al., Cryogenics, Feb. 1978.
"Heat Transfer by the Circulation of Supercritical Helium" by H. H. Kolm et al., Advances in Cryogenic Engineering, vol. 11, Plenum Press, New York, 1965.
"An Electrically Pumped Liquid Helium Transfer System" by B. Darrel et al., Advances in Cryogenic Engineering, vol. 11, Plenum Press, New York, 1965.

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