CENTRIFUGAL GEAR PUMP (VERSIONS) Russian patent published in 2007 - IPC F04C11/00 F04D13/12 

FIELD: mechanical engineering, pumps.

SUBSTANCE: invention relates to positive displacement hydraulic pumps with rotating external working members which can be used in oil systems of aircraft gas-turbine engines for delivering and pumping out of oil. According to first design version, centrifugal gear pump has housing, gears arranged outside centrifugal pre-activated impellers and installed in bores of housing, roots of teeth being provided with ring grooves, suction and delivery spaces separators installed in pairs, and members to transmit torque from impellers to gears and axial fixing of gears. Gears are installed relative to impellers for axial displacement. Axial fixing members are made in form of split spring rings arranged between gears and impellers in middle of impellers. Separators are made in form of bushings with flanges rigidly secured in housing by means of threaded plugs. Flanges of bushings are made in form of arcs limited by sector with central angle of 160° - 165°, and parts of flanges in zone separating suction and delivery spaces are limited by sector with central angle of 115° - 120°.

EFFECT: optimization of pump operation owing to fixing separators of suction and delivery spaces in pump housing, increased service life and improved reliability of pump in operation.

3 cl, 9 dwg