STAGE OF SUBMERSIBLE MULTISTAGE CENTRIFUGAL PUMP Russian patent published in 2006 - IPC F04D1/06 F04D13/10 

FIELD: hydraulic machine building; submersible pumps.

SUBSTANCE: invention relates to submersible multistage centrifugal pumps designed for lifting liquids from wells. Proposed stage of submersible multistage centrifugal pump consists of impeller 1 with blades 6 located between driving and driven disks 4, 5, respectively, and forming flow section of impeller 1, and guide-vane assembly 2 with vanes 11 located between disks 10, 12 forming flow section of guide-vane assembly 2. Blades 6 are L-shaped. Projecting output sections 8 of blade 6 are arranged over circumference behind outer edge of driving disk 4 to form axial annular grid thanks to which turning of liquid flow from output of impeller 1 from radial direction into axial direction is provided. Height of projecting sections 8 of impeller 1 relative to outer surface of driving disk 4 is from 0.5 to 1.0 of height of flow section of impeller 1.

EFFECT: improved reliability of pump in operation, increased head in wide range of deliveries at reduction of total level of hydraulic losses.

3 cl, 3 dwg