Hydrostatically balanced gear pump

Details Hydrostatically balanced gear pump Hydrostatically balanced gear pump

1994-06-02

1996-11-26

Freay, Charles

Pumps

Motor driven

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

418 72, 4182061, F04B 3906

Patent

active

055778992

ABSTRACT:
A gear pump is hydrostatically balanced by providing a plurality of coupling passages connecting diametrically opposed spaces formed between teeth of the gears. The coupling passages form pressure balancing fluid paths which serve to eliminate pressure differences between the diametrically opposed spaces. Additionally disclosed are balancing pistons which act on spindles supporting the gears. The balancing pistons are aligned to oppose resultant of the remaining forces. Additionally discloses is an eductor motor positioned within a fluid reservoir and connected for driving the gears.

REFERENCES:
patent: 2491365 (1949-12-01), Ernst
patent: 3315604 (1967-04-01), Roeske
patent: 5261796 (1993-11-01), Niemiec et al.

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