Liquid pump sealing system

Details Liquid pump sealing system Liquid pump sealing system

1975-04-08

1977-12-27

Freeh, William L.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

415112, 415175, F04B 1700

Patent

active

040652327

ABSTRACT:
An improved system to eliminate a stuffing box or mechanical seal around the rotating shaft of a pump for liquids. The pump and its motor are hermetically sealed, and a pressurized gas pad maintains a liquid seal at the shaft entrance to the pump casing. A suction return line is provided from the seal liquid to the pump suction. A small flow of pumped liquid leaks past the shaft entrance into the seal liquid, then through the return line back to the pump suction. The gas pad and seal liquid are at slightly higher than pump suction pressure.

REFERENCES:
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patent: 2038131 (1936-04-01), Richard
patent: 2468704 (1949-04-01), Pippin
patent: 2583060 (1952-01-01), Paulsen
patent: 2622537 (1952-12-01), Wortendyke
patent: 2764943 (1956-10-01), Peters
patent: 2839006 (1958-06-01), Mayo
patent: 2959133 (1960-11-01), Erwin
patent: 3379132 (1968-04-01), Wagner
patent: 3408942 (1968-11-01), Davenport et al.
patent: 3513942 (1970-05-01), Sato
patent: 3652186 (1972-03-01), Carter
patent: 3744935 (1973-07-01), Magni
Pump Handbook, McGraw-Hill Book Co., USA, 1976, pp. 3-98.

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