Pressure equalizing device and deep well motor/pump combination

Details Pressure equalizing device and deep well motor/pump combination Pressure equalizing device and deep well motor/pump combination

1981-11-27

1984-01-10

Freeh, William L.

Pumps

Motor driven

Electric or magnetic motor

310 87, F04B 3504, H02K 512

Patent

active

044250878

ABSTRACT:
In a fluid-filled electric motor having a throughgoing shaft the requirements (i) internal fluid pressure maintained above ambient during installation (ii) equalization of internal and ambient pressures at run-up (iii) no solid particles contaminate internal fluid are met by a pressurizing apparatus in which internal motor pressure above ambient moves a piston against a spring. The pressure ensures integrity of a seal and pressure and temperature variations are accommodated by piston movement. The seal runs clear of the motor shaft allowing equalization of internal and ambient pressures during run up to speed. Only liquid can enter the spring chamber.

REFERENCES:
patent: 1363315 (1920-12-01), Dron
patent: 2032000 (1936-02-01), Brown et al.
patent: 2381834 (1945-08-01), Meredew et al.
patent: 2740059 (1956-03-01), Conery
patent: 2876370 (1959-03-01), Pleuger et al.
patent: 4040773 (1977-08-01), Tuzson

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