CENTRIFUGAL PUMP STAGE Russian patent published in 2019 - IPC F04D1/06 F04D29/22 F04D29/44 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pump engineering. Centrifugal pump stage comprises, at least, impeller and guide vanes. Inter-blade channels are made round or close to the mold circle in the cross section. In this case, close to the circle is the form, in which the distance from the channel axis to the least remote point on the channel wall is not less than 90 % of the distance from the channel axis to the most remote point. Such shape will allow to reduce or prevent the formation of vortexes caused by non-uniform distribution of velocities and pressures over the section.

EFFECT: invention is aimed at reduction of head losses caused by non-uniformity of speed and pressure distribution along channel section, which will allow increasing overall efficiency of the stage.

1 cl, 3 dwg