TUBULAR IMPELLER Russian patent published in 2009 - IPC F03B3/12 

FIELD: engines and pumps.

SUBSTANCE: invention is related to hydropower engineering, namely to design of turbine impellers. Tubular impeller comprises blades and shaft with upper and lower bearing disks. Tubular blades bent in the shape of elbow are installed between disks. Outlets of tubular blades are oriented horizontally along tangents to circumference of lower disk. Blades are arranged in the form of pipe sections, inlet upper sections of which are installed vertically. All pressure flow passes only inside tubular blades, which excludes non-power flow of water passing through turbine, improves cavitation characteristic of turbine and flow laminarity. External surfaces of tubular blades and surfaces of other impeller parts remain dry, which reduces losses for friction.

EFFECT: higher efficiency of impeller.

1 dwg