Gear pump having a pressure biased side sealing plate and thrott

Details Gear pump having a pressure biased side sealing plate and thrott Gear pump having a pressure biased side sealing plate and thrott

1989-05-10

1990-11-20

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

F04C 218, F04C 1500

Patent

active

049715348

ABSTRACT:
A gear pump comprises two gears arranged in engagement with one another, a sealing plate arranged at one side of the gears and insignificantly movable relative to the latter, two pressure fields including a low pressure field and a high pressure field, and forming a narrowing at the side of the high pressure field such that pressure difference at the narrowing act on the sealing plate so as to lift the sealing plate from side surfaces of the gears starting from a predetermined number of revolutions of the gears which is determined by the narrowing.

REFERENCES:
patent: 2990341 (1963-07-01), Oliver
patent: 2996999 (1961-08-01), Trautman
patent: 3476055 (1969-11-01), Crowther
patent: 4344745 (1982-08-01), Herrmann
patent: 4678341 (1987-07-01), Stuckey

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