AXIAL-BLOW BLOWER Russian patent published in 2003 - IPC

FIELD: blower manufacture, possibly making blowers with small percentage diameter of sleeve. SUBSTANCE: blower with low percentage diameter of sleeve (no more than 0.55) includes housing in which impeller is mounted and straightening out apparatus. Impeller includes sleeve to which working blades are secured. Blades have mean line of their profile in radial sections of impeller restricted by circle arc and camber lowering to periphery in inverse proportion to radius. Novelty is changing of angle of mounting of blade profile in each radial section of impeller according to cubic parabola law. Relation of chord of mean line of profile of impeller blade to peripheral radius changes along straight line on length of blade. EFFECT: enhanced efficiency of blower at high coefficient of static pressure. 4 dwg