PROPELLER OF REVERSIBLE AXIAL FAN Russian patent published in 2011 - IPC F04D29/36 

FIELD: machine building.

SUBSTANCE: propeller of reversible axial fan consists of hub, of bearing disks, of ferrule and of leaf blades. Also, the leaf blades are arranged in pairs on the ferrule at alternate step; they are set off one relative to another and interconnected with bridges. In a case of the propeller there is installed webbing connecting the hub, the bearing disks and the ferrule. Thickness h_b of blade, h_f of ferrule, h_d of the bearing disks and h_h of a hub wall is chosen from condition h_b<h_f<h_d<h_h.

EFFECT: raised reliability, reduced cost of axial fans controlled and reversible on the run by changing direction and rotation frequency of propeller.

4 dwg