STAGE OF MULTISTAGE VANE PUMP Russian patent published in 2020 - IPC F04D1/06 F04D13/10 F04D29/22 F04D29/44 

FIELD: pumps engineering.

SUBSTANCE: invention relates to the field of pump engineering and can be used mainly in multistage electric submersible vane pumps for oil production and facilities for maintaining reservoir pressure of oil deposits. Multistage vane pump stage comprises impeller and guide vane. Flow channels on the periphery of the step elements, at the outlet of the liquid flow from the impeller and at the inlet of the guiding device, are made with rounding of the oval shape in the axial projection. Oval sections smoothly mate with inner sections of flow channels, which are perpendicular to pump rotation axis. Ratio of radius of peripheral rounding of flow channels in axial projection to their width at outlet of impeller and inlet of guide vanes is subject to certain ratio.

EFFECT: invention is aimed at increasing specific head of pump stage due to reduction of its axial size (height), without significant growth of its hydraulic resistance, and therefore, significant reduction of its energy efficiency.

3 cl, 4 dwg