CENTRIPETAL IMPELLER PUMP FOR TRANSFER OF HEATED NON-UNIFORM BY DENSITY LIQUIDS Russian patent published in 2017 - IPC F04D1/02 F04D7/00 F04D29/18 

FIELD: pumps.

SUBSTANCE: invention relates to pump engineering. Pump includes inlet branch pipe, centripetal impeller, consisting of drive and covering discs, radial blades (4), bent along circle arc with radius (r_l) with center of curvature (O₂), displaced relative to center of rotation (O₁), and combined with it orthogonal coordinate system beginning radially along axis (Y) at distance (Y_o) and along axis (X) in direction of rotation from axis (Y) at distance (X_o), and conical bushing with decreasing diameter; supply, discharge and shaft, driven by induction motor. Wheel has inlet section, arranged along periphery on impeller (D_1rk) outer diameter, and outlet cross-section, located in central part on inner diameter (D_2rk=(0.3-0.7)D_1rk). Supply is located from outer side, opposite to wheel inlet cross-section, and made in form of helical channel (10) with constant width in circumferential direction, equal to wheel width at inlet, and with height counted from wheel outer diameter D₁ to helical channel wall inner surface (9), decreasing in proportion to angle of coverage (φ_cov), with height (h_sk), counted from initial section height (h_1sk) adjacent to inlet branch pipe and taken as coverage angle zero (φ_cov= 0°), corresponding to pump inlet area, to final height through one turn of current coverage angle (φ_cov=360°), equal to radial gap value (h_2sk=δ_r), providing free rotation of wheel. Discharge is located on outer side, opposite to wheel outlet section (2_pk), and made in form of annular diffuser, formed by outlet branch pipe wall inner surface with inner diameter and outer surface of wheel conical bushing.

EFFECT: invention is aimed at achievement of maximum efficiency due to formation of convection from periphery to center at action of rotary acceleration.

1 cl, 2 dwg