Gear type pump or motor with radial balancing

Details Gear type pump or motor with radial balancing Gear type pump or motor with radial balancing

1975-04-09

1976-10-19

Vrablik, John J.

Rotary expansible chamber devices

Pressure fluid radially balances working or rotating...

Counterbalancing fluid directed to intertooth spaces or...

418126, 418132, F01C 2100, F03C 300, F04C 1500, F01C 1904

Patent

active

039868001

ABSTRACT:
An external gear pump wherein the gears are installed in an eight-shaped compartment of a central housing section which is flanked by two covers. The outlet port of the housing communicates with two arcuate recesses for metallic inserts which are biased against the adjacent gears by fluid pressure in the outlet port whereby the inserts urge the gears against those portions of the internal surface of the central housing section which are located opposite the recesses. Such portions of the internal surface are formed with narrow first cutouts which communicate with the outlet port. The internal surface is further formed with relatively wide additional cutouts which are located between the first cutouts and the recesses and communicate with the inlet port. The force which is produced by fluid in the cutouts opposes the force which urges the gears against the internal surface of the central housing section to thus reduce the force with which the stubs of the gear shafts are urged against the housing.

REFERENCES:
patent: 1937367 (1933-11-01), Vickers
patent: 2212994 (1940-08-01), Vrolix
patent: 2808007 (1957-10-01), Gaubatz
patent: 2993450 (1961-07-01), Weigert
patent: 2996999 (1961-08-01), Trautman
patent: 3381619 (1968-05-01), Mingot
patent: 3847519 (1974-11-01), Dworak et al.

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