FIELD: pumps building.
SUBSTANCE: centrifugal pump impeller comprises main disc, cover disc and vanes arranged there between. Each blade is made in the form of a bent convex surface with the beginning of construction on a segment from the diameter of the main disc to the diameter of the covering disc with turning through angle of 140–360°. Turning starts at an angle β1 between blade edge and tangent to outer circumference of main disc and ends at an angle β2 between another edge of blade and tangent to outer circle, with offset along axis by value L. Values α – inclination angle of blade leading edge, should lie in range from 30 to 90°.
EFFECT: invention is aimed at reduction of acoustic noise and hydrodynamic vibrations of pump rotor, improvement of reliability and reduction of impeller positive suction bead.
1 cl, 4 dwg
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