COMBINED CENTRIFUGAL GEAR WHEEL PUMP Russian patent published in 2013 - IPC F04D13/12 F04C11/00 

FIELD: engines and pumps.

SUBSTANCE: pump contains the located in casing bores and engaged gears, which have annular bores near teeth roots with separators of suction and decreasing cavities located in them, at the front ends directed to the input there are centrifugal impellers preliminary engaged. There is, at least, one additional gear in casing bore that is engaged with neighbouring gears and equipped with centrifugal impeller preliminary engaged. In the places of engagement and disengagement with additional gear there are additional suction and decreasing cavities. The gears that are in double engagement have two separators of suction and decreasing cavities in annular bore near teeth roots, between which there are suction channels.

EFFECT: invention allows increasing the supply of combined centrifugal gear wheel pump without changing geometrical parameters of gear engagement and increasing the frequency of its rotation.

3 cl, 2 dwg