Bionical sawtooth flabellum structure of multilayer

The utility model discloses a bionical sawtooth flabellum structure of multilayer is ring-type a plurality of flabellum units of having arranged on the hub, fan blades that every flabellum unit scales up by a plurality of mutual superpose and length in proper order leaves the clearance between adjacent two flabellum pieces in the flabellum unit, the terminal surface that the hub was kept away from to the flabellum piece is provided with bionical sawtooth structure. The flabellum unit adopts this kind of multilayer step structure, and the poor eddy current loss that produces of wind speed of effectual reduction flabellum piece outward flange makes the poor even production of wind speed at the edge of each flabellum piece, rationally avoids the ship earthquake region, improves flabellum piece air force performance, makes the flabellum piece have lower noise, bigger flow and geng gao's static pressure when the same rotational speed, flabellum piece edge is provided with bionical sawtooth structure, and its design theory derives from the analysis to the pinion reason, and the class sawtooth structure of pinion reason is favorable to improving flabellum piece aerodynamic performance, and it is poor also to reduce the wind speed to reduce eddy current loss, reach energy-conserving effect.