RADIAL-FLOW FAN Russian patent published in 1998 - IPC

FIELD: fan manufacture. SUBSTANCE: fan has drum-type impeller with optimal proportion of dimensions of basic parts determined by means of specially developed mathematical model for fans of particular design. Fan is characterized in relative increase in entrance diameter of blades and diameter of inlet pipe, in certain increase in number of blades and angle of their outlet, and reduced pressure drop in shroud and impeller especially at blade entrance due to reduced angle of attack. EFFECT: improved air flow rate, pressure, and efficiency of fan. 5 dwg