IMPELLER OF CHANNEL CENTRIFUGAL FAN Russian patent published in 2003 - IPC

FIELD: mechanical engineering; fans and ventilators. SUBSTANCE: proposed impeller contains main disk with tip. Diameter of main disk with tip is equal to 1.05-1.15 of outer diameter of blades. Diameter of cover disk with tip is equal to 1.1-1.2 of outer diameter of blades. Generatrix of tip of cover disk is straight-line. Generatrix of tip of main disk is curvilinear in form of arc of circumference. Non-widening channel is formed between generatrices of main disk and tip of cover disk. EFFECT: improved headrate characteristic and efficiency of fan. 4 cl, 4 dwg