CENTRIFUGAL GEAR-TYPE PUMP Russian patent published in 2015 - IPC F04D13/12 F04C11/00 

FIELD: engines and pumps.

SUBSTANCE: pump includes engaged gears (4, 5) arranged in bores of housing (1) on parallel shafts (2, 3) and provided with bores (6, 7) made on the end face facing to the inlet and liquid supply channels (8, 9) to inter-teeth cavities. Each of gears (4, 5) is provided with pre-axial wheel (12, 13). Channels (8, 9) are made inside hub of gear (4, 5) with intake holes located on the side surface of bore (6, 7). Inside bore (6, 7) there installed concentrically to axial wheel (12, 13) is conical adapter (14, 15) with a shaped side surface, the edge (16, 17) of which is located opposite the holes.

EFFECT: simpler pump design due to refuse to use a pre-radial impeller at the inlet of inter-teeth cavities of gears and due to necessity of directed mutual orientation during assembly of blade profiles of the impeller and the axial wheel.

1 dwg