IMPELLER OF CENTRIFUGAL PUMP Russian patent published in 2020 - IPC F04D29/22 F04D29/68 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in centrifugal pumps. Impeller comprises blades (1) uniformly distributed in circumferential direction with thickness b_l and identical skeletons of profiles (2). Inlet edges (3) of blades (1) are located at distance R_in from axis of rotation, and output edges (4) - at distance R_out of axis of rotation. Working surfaces (5) form interbedded channels (6) with length L_ch. On surfaces (5) there are made semi-cylindrical cut-outs (7) with radius r_cut = 0.4b_l, located with an indent from L₀ = 0.25L_ch from input edge (3) and interval Δ = 4r_cut along the whole length L_ch of inter- blade channel (6). L₀ and interval Δ indentation dimensions depend on flow rate, angular speed of rotation, blade angle and pump head.

EFFECT: invention is aimed at improvement of power and cavitation characteristics of a centrifugal pump, at the same time increasing efficiency, reducing consumed power and over-cavitation pressure.

1 cl, 4 dwg