Gear pumps with low pressure shaft lubrication

Details Gear pumps with low pressure shaft lubrication Gear pumps with low pressure shaft lubrication

1978-01-30

1979-07-10

Croyle, Carlton R.

Rotary expansible chamber devices

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

F04C 1500

Patent

active

041606302

ABSTRACT:
An improved gear pump includes seal plates having lubrication channels communicating between the low pressure side of the zone where the gear teeth intermesh and the shaft bearings. Lubricant flow is directed first through one bearing on one side of the pump and then back through the other bearing on that side to the pump inlet chamber. Placement of the lubrication channels on the low pressure side of the pump where the volume between intermeshing teeth is increasing 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: 2885965 (1959-05-01), Haberland
patent: 3447472 (1969-06-01), Hodges et al.
patent: 3490382 (1970-01-01), Joyner
patent: 3528756 (1970-09-01), Norlin et al.
patent: 3690793 (1972-09-01), Pollman et al.
patent: 3909165 (1975-09-01), Laumont
patent: 4090820 (1978-05-01), Teruyama

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