CENTRIFUGAL GEAR-TYPE PUMP Russian patent published in 2014 - IPC F04D13/12 F04C11/00 

FIELD: machine building.

SUBSTANCE: pump comprises geared pinions 2 which are placed in the counterbores of a casing 1 and are installed on shafts 3 set in bearings 4. Central counterbores 5 are made at the end face of each pinion 2 turned to the input. The pump is fitted by channels 12 to supply liquid to the space 13 between the teeth of the pinions 2, by separators 9 of increasing and decreasing spaces 7, 8 which are fixed in the casing 1, and by intake ports 11. The channels 12 are provided inside the hub of the pinion 2 with the inclination to its rotation axis. The ports 11 are directed to the input of the central counterbore 5 of the pinion 2 forming a solid wall along the outer diameter. The separators 9 are set with overlapping of the intake ports 11 of the supply channels being in contact with the outer walls of the separators 9. The network of the channels 12 rotating together with the pinions 2 represents a blade cascade of a primer centrifugal pump.

EFFECT: possibility to reject the usage of a special blade wheel thus simplifying the pump design, reducing labour inputs and improving efficiency factor.

2 cl, 2 dwg