Gear pump or motor with low pressure bearing lubrication

Details Gear pump or motor with low pressure bearing lubrication Gear pump or motor with low pressure bearing lubrication

1981-04-03

1983-07-12

Vrablik, John J.

Rotary expansible chamber devices

Shaft or trunnion lubrication or sealing by diverted working...

418132, F04C 2902, F04C 218, F03C 208

Patent

active

043927980

ABSTRACT:
An improved gear pump or motor includes seal plates (30, 32) having a lubrication channel (48, 50) communicating between the shaft bearings (18, 20, 22, 24) and the low pressure side of the zone (62) where the gear teeth (58, 60) intermesh. Lubricant flow is directed first through one bearing on one side of the pump and then back through a separate channel (54, 56) to the other bearing on the same side of the pump. Placement of the lubrication channels on the low pressure side of the pump where the volume between intermeshing teeth is increasing and the pressure between the teeth is below inlet pressure ensures that flow reversals in the bearings and lubricant aeration are avoided; and renders bearing flow rate less sensitive to pressure, so that relatively large flow channels may be used in the wear plate.

REFERENCES:
patent: 1682842 (1928-09-01), Hamer
patent: 1972271 (1934-09-01), McIntyre
patent: 2276107 (1942-03-01), Simons
patent: 2823616 (1958-02-01), Toyoda
patent: 2986096 (1961-05-01), Booth et al.
patent: 3447472 (1969-06-01), Hodges
patent: 3490382 (1970-01-01), Joyner
patent: 3690793 (1972-09-01), Pollman et al.
patent: 4090820 (1978-05-01), Teruyama
patent: 4160630 (1979-07-01), Wynn

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