CENTRIFUGAL GEAR PUMP Russian patent published in 1999 - IPC

FIELD: oil systems of aircraft gas- turbine engines. SUBSTANCE: pump has gears mounted on the outside of centrifugal preconnected impellers in bores of housing. Circular bores are made at roots of teeth where suction and delivery chamber separators are mounted in pairs. Pump is also provided with members for transmission on torque from impellers to gears and for their axial location. Gears are mounted for possible radial and axial displacement relative to impellers. Axial location members are made in form of split spring rings located in center portion of impellers between gears and impellers. Members for transmission of torque from impeller to gears are located inside slots of axial location members. Since clearances in axial and radial location members are larger considerably than end clearances and radial clearances in centrifugal pumps, end faces of gears and separators are self-aligning relative to engageable surfaces ensuring ideal faying. EFFECT: enhanced operational reliability. 2 cl, 5 dwg