Pump improvement

Details Pump improvement Pump improvement

1985-05-03

1986-11-11

Freeh, William L.

Pumps

One fluid pumped by contact or entrainment with another

Jet pump with motive fluid generating pump

417423R, 415170A, 415112, 210787, F04D 706, F04D 2912

Patent

active

046219811

ABSTRACT:
A pump assembly having an impeller for pumping a liquid from an inlet to an outlet, said impeller being driven by a motor, and mechanical seal means comprising a pump seal and a motor seal with a seal leakage chamber therebetween, and ejector means for inducing flow of liquid from the seal chamber so that it does not leak across the faces of the seal rings of the motor seal and into the motor housing where it would damage the motor. The ejector means has a nozzle driven by pump liquid and a suction chamber connected to the mechanical seal leakage chamber. By preventing liquid from the seal chamber from leaking across the faces of the motor seal into the motor housing, the ejector means maintains the seal leakage chamber at or near the vapor pressure of the pumped fluid.

REFERENCES:
patent: 879484 (1908-02-01), Murternd
patent: 913407 (1909-02-01), Ljungstrom
patent: 2124681 (1938-07-01), Jauch et al.
patent: 2441708 (1948-05-01), Luaces et al.
patent: 2654479 (1953-10-01), Driessen
patent: 2850550 (1974-11-01), Kaessen
patent: 2933044 (1960-04-01), Williams
patent: 3457870 (1969-07-01), Sleeter
patent: 3574478 (1971-04-01), Toth, Jr. et al.
patent: 3790312 (1974-02-01), Bottoms
patent: 3976391 (1976-08-01), Randell
patent: 4352637 (1982-10-01), Weisenbach

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