RADIAL-FLOW AUGER PUMP Russian patent published in 2011 - IPC F04D9/04 F04D13/04 

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises housings 5, 21, 23, 35, impeller 2 with hub 3 fitted on shaft 1, and auger 12. Shaft 1 runs in bearing 4 protected by seal 36. Intermediate shaft 6 runs in bearings 7, 8 inside hub 3, inner shaft 9 runs in bearing 10, 11 inside the former shaft. Opposite extension of shaft 9 supports hydraulic turbine impeller 13 arranged inside shaft 1. Auger 16 is arranged on shaft 6 on inlet side, between auger 12 and impeller 2. Impeller 17 of hydraulic turbine 18 is arranged on opposite extension of said shaft. Hub 3 has holes 28 to communicate space of impeller 2 with space 20. Rear end face of impeller 2 incorporates seal 26 with relief space 27 arranged there under. Hollow shaft 1 comprises front, central and rear spaces 20, 29, 30. First hydraulic turbine 14 is mounted between spaces 29 and 30 14. Second hydraulic turbine 18 is mounted between spaces 29 and 20. Thrust bearing 11 is fitted between guide vanes 19 of hydraulic turbine 18. Holes 37 are made in shaft 1 between searing 4 and seal 36 that communicates with space 30.

EFFECT: improved cavitation properties, inner and intermediate shaft relieved of axial loads.

2 cl, 2 dwg