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

FIELD: engines and pumps.

SUBSTANCE: centrifugal screw pump includes impeller 2 with hub 3, which is installed in housing 5 on the main shaft 1. Inside shaft 1 there installed is additional shaft 6 on which there installed on the end from the inlet of wheel 2 is screw 8. To housing 5 there connected are inlet and outlet housings 16, 18. Inside screw 8 there made is internal cavity 9 interconnected via channel 11 and holes 12, 13, 21 to cavity 19 of outlet housing 18. On external or front surfaces of screw 8 there made are holes 10 interconnected with inner cavity 9 for creation of torque moment on screw 8 combined with hydraulic turbine. Between shafts 1 and 6 there can be installed at least one intermediate bearing 7 which can be magnetic.

EFFECT: improving cavitation properties of pump.

3 cl, 1 dwg