CENTRIFUGAL PUMP RUNNER Russian patent published in 2017 - IPC F04D29/22 

FIELD: engines and pumps.

SUBSTANCE: invention refers to machine engineering. The pump contains a heterogenic blading; the blades (1-6) form the channels (7) between each other. At least two blades (1-3) have different framework profiles. All blades (1-6) have a wedge-shaped form. External channel (7) bypasses, which at the same time delineate blade profiles, are performed by curves (8, 9) tangential to circumferences with the diameters D_i inserted between the frameworks (10) at different radiuses of the runner. Whereupon, the diameters at any radius of the runner are defined via the certain formulation and depend on values of the circumference diameter (11) in the channel throat (7), the thickness of an input blade profile edge (1-6), and the constant with a value more than 1/4 and less than 1.

EFFECT: invention of the runner is directed to the increasing of the performance factor and extension of effective operation area of a centrifugal pump.

4 cl, 3 dwg