AUGER CENTRIFUGAL PUMP Russian patent published in 2010 - IPC F04D9/04 F04D13/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pump production and can be used in turbopump units incorporated with liquid propellant rocket engines. Proposed pump comprises housing 20, auger 4 and impeller 2 with hub 3 fitted on shaft 1. It also incorporates extra shaft 13 with collar 34, friction 7 and magnetic 31 couplings, hydraulic turbine, inner spring 33 and automatic control device 10 fitted on shaft 13 to control load on auger 4. The latter is furnished with sleeve 5 and ring 6 and seats on extra shaft 13. Friction coupling 7 is arranged on auger ring end face and impeller 2. Nozzle unit 29 and hydraulic turbine wheel 30 are arranged inside chamber 28 of hub 3 of impeller 2 communicated, via holes 32, with inside space of impeller 2. Turbine wheel 30 is coupled, via magnetic coupling 31, with extra shaft 13 that axially displaces and is loaded by inner spring 33. The latter thrusts against collar 34 of shaft 13 and hub 3 of impeller 2. Auger 4 is loaded by spring 10 of aforesaid automatic control device 11 on the pump inlet side.

EFFECT: improved anti-cavitation properties.

3 cl, 2 dwg