Casing for gear pump or motor

Details Casing for gear pump or motor Casing for gear pump or motor

1976-12-06

1978-08-22

Croyle, Carlton R.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

291564R, 29445, F04C 1502, B23P 1500

Patent

active

041085825

ABSTRACT:
A gear pump or motor comprises a tubular casing having an internal shoulder and an inlet and outlet for working fluid. A pair of meshing gearwheels are each mounted in the casing between a pair of rigid bearings which are disposed one on either side of the shoulder adjacent respective end plates closing the ends of the casing. Screws passing through the shoulder are provided for clamping the shoulder between the bearings and end plates. In an unclamped condition of the shoulder, the difference between the axial lengths of the shoulder and the gearwheels is greater than a predetermined operating clearance between the gearwheels and the bearings. In a clamped condition of the shoulder in the normal operating conditions of the pump or motor, the shoulder is resiliently deformed to reduce the said difference to a value at most equal to the predetermined clearance.

REFERENCES:
patent: 2969744 (1961-01-01), Hoffer
patent: 3292551 (1966-12-01), Gordon
patent: 3395646 (1968-08-01), Gelin
patent: 3481275 (1969-12-01), Gelin
patent: 3597130 (1971-08-01), Eckerle et al.
patent: 3895890 (1975-07-01), Laumont

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