Liquefied gas pump

Details Liquefied gas pump Liquefied gas pump

1986-10-24

1988-06-28

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Including means for handling working fluid leakage

Leakage through seal between runner or shaft and static part

415176, 415144, 415169A, F01D 2532

Patent

active

047535717

ABSTRACT:
A liquefied gas pump wherein a vessel contains a supply of liquefied gas which is pumped from its inlet to its outlet by a multi-stage upright centrifugal pump whose first stage is immersed in the supply of liquefied gas in the vessel. The shaft seal at the upper end of the pump housing is held out of contact with liquefied gas by a first flow restrictor above the last stage of the pump, an expansion chamber which is filled with liquefied gas and is located above the first flow restrictor, a gas collecting chamber between the expansion chamber and the seal, and a second flow restrictor which is disposed between the two chambers and prevents penetration of liquefied gas from the expansion chamber into the collecting chamber. The latter is connected with the vessel and/or with a gas collecting tank. The expansion chamber is connected with the second and/or third stage of the pump in order to ensure that it is filled with liquefied gas.

REFERENCES:
patent: 3117792 (1961-06-01), Glenn et al.
patent: 3370542 (1968-02-01), Harney
patent: 3733145 (1973-05-01), Kaplansky
patent: 4128362 (1978-12-01), Shepherd et al.
patent: 4146238 (1979-03-01), Gaffal
patent: 4390317 (1983-06-01), Lehmann

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