RADIAL-FLOW PUMP Russian patent published in 2012 - IPC F04D1/00 F04D29/44 

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises casing with spiral branch pipe with inner and outer coils. Sum of areas of inner coil and outer coil bypass section equals the area of outer coil spiral section outlet cross section while that of similar areas of initial cross section of outer coils and that of adjacent diffuser section of inner coil equals the area of inner coil spiral section cross section. Outer and inner coils are separated by inner bypass wall which, in the zone of adjacent diffuser sections, divides their cross section areas at inlet at the ration of 1.5±0.15. pump diffuser comprises annular deck and system equally spaced vanes to make diffuser channels there between. Configuration of outer and inner lateral surfaces is delineated by different-center radii in cross section over height L. Number, spacing and angle of L swirling are taken proceeding from the following condition: angular width of L projection on arbitrary axial cylindrical surface NA ifs partially overlapped by inlet and outlet sections of similar projections at not more than two adjacent Ls.

EFFECT: stabilised pumped flow, higher efficiency, longer life, lower power consumption.

10 cl, 4 dwg