Sandwich type rim double-layer blade wind driven generator impeller

The utility model provides a sandwich type wheel flange double-layer blade impeller of a wind driven generator, which solves the problems that the whole blade tip impeller of the existing wind driven generator is small in total area, large in implementation difficulty, large in wind resistance when the wheel flange rotates and the like, and adopts the technical scheme that the wheel flange comprises a sandwich type wheel flange consisting of an inner panel, a middle core plate and an outer panel, conical break angles are formed on the edges of the two sides of the rim, the blades comprise inner-layer blades and outer-layer blades, and a plurality of double-output-shaft variable-pitch motors are evenly erected in the middle of a sealed cavity between an inner panel and an outer panel along the circumference and used for driving the inner-layer blades and the outer-layer blades to conduct linkage variable pitch. The rim is connected with disc-shaped flanges installed on the two sides of the impeller hub through