REACTIVE IMPELLER OF CENTRIFUGAL PUMP Russian patent published in 2017 - IPC F04D29/22 

FIELD: machine building.

SUBSTANCE: invention relates to the field of pump building. Reactive centrifugal pump impeller comprises blades evenly distributed along the circumference (1) with identical skeletons (2) profiles. Middle line (3) of the inter-blade channels (4) are the geometric place of points - centers of the circles with diameters Di (i = 1n…), inscribed between the skeletons (2) of the adjacent profiles on different radii of the wheels. External contours of the inter-blade channels (4) are formed by the curves (5) and (6), tangent to the circle with diameter d_i<Di, concentric circles inscribed between the skeleton (2). The diameters d_i any radius of i-th wheel are determined by the dependance d_i= (D1-s)⋅k+(⋅Di-s)(1-k), where D1 - The diameter Di of the circle (₇) in the throat of the channel, when i = 1; s - thickness profile blade inlet edge and the constant k is identical for all channels and the wheel can have values ranging from 0.3 to 0.5.

EFFECT: invention reduces eddy (diffuser) losses in the inter-blade channels of the impeller with a simultaneous increase in its hydraulic efficiency.

2 cl, 2 dwg