CENTRIFUGAL SECTIONAL PUMP Russian patent published in 2024 - IPC F04D29/00 

FIELD: pump building.

SUBSTANCE: invention relates to pump industry, in particular, to designs of multistage centrifugal pumps of sectional type, intended for mobile pump units. Centrifugal sectional pump comprises a housing with inlet and outlet branch pipes, shaft, end seals, flow part, including in-series installed impellers with guide vanes and housings of sections, forming stages, and discharge part, at that, the impellers are made with an annular projection on the outer surface of the covering disc with width of 3 mm and with chamfer of 45°, in front of the first stage impeller there is a sealing ring in the form of a cylindrical metal ring with a bore with radius of 75 mm, at that, after the inlet branch pipe and in front of the first stage impeller, an inner space is formed, which is a suction zone, in which a fairing installed in front of the sealing ring is arranged, wherein cowl has groove, inlet and outlet branch pipes are arranged vertically and perpendicular to shaft axis while pump housing discharge part is made in the form of a semi-annular chamber.

EFFECT: improving operating efficiency of a centrifugal sectional pump due to increased energy efficiency, reliability and provision of possibility of its compact arrangement in mobile pump units.

8 cl, 6 dwg