Wind power generation device

A wind power generation device, comprising:

• a wind blocking structure formed as a box-shaped structure having a top opening, wherein the box-shaped structure comprises a bottom plane, and the box-shaped structure is fixed on ground by the bottom plane, and the box-shaped structure comprises a windward side configured to receive power of wind, and the wind blows through a plurality of holes on a travel path in the box-shaped structure;
• a wind vane rotating body comprising a rotating shaft and a plurality of vanes, wherein the plurality of vanes are fixed on the rotating shaft and arranged at equal angle intervals, the wind vane rotating body is mounted and combined with two bearings of the wind blocking structure via the rotating shaft, and configured to rotate the plurality of vanes in the box-shaped structure, and wherein the box-shaped structure comprises a front plate, a rear plane, a left side plane, and a right side plane, the front plate is in a flat plate shape and serves as the windward side of the box-shaped structure, the rear plane, the left side plane and the right side plane comprise the plurality of holes formed thereon, so that the wind blows into the box-shaped structure to drive the plurality of vanes to rotate below the rotating shaft, to further press air, and the pushed and pressed air flows out of the box-shaped structure through the plurality of holes, and wherein the two bearings are disposed on the left side plane and the right side plane of the box-shaped structure, respectively;
• a power generator connected to the rotating shaft, and fixed on a side of the box-shaped structure by a linking plate, wherein when the wind blows to the wind blocking structure to rotate the wind vane rotating body, the power generator is driven by rotation power of the rotating shaft to generate and output electrical power, and wherein the power generator is fixed on the right side plane of the box-shaped structure by the linking plate, and wherein heights of the front plate and the rear plane of the box-shaped structure are close to that of the rotating shaft of the wind vane rotating body, so that one of the plurality of vanes protrudes out of the wind blocking structure, and the remaining of the plurality of vanes are kept inside the box-shaped structure;
• and
• a plurality of area enlarging structures, wherein two different sides of at least one of the plurality of vanes are connected to the plurality of area enlarging structures, respectively, and wherein a flexible cloth is connected between the plurality of area enlarging structures on the two different sides of the vane, and each of the plurality of area enlarging structures comprises a hollow circular cylinder connected to one of the two different sides of the vane, a circular rod retractable in the hollow circular cylinder, and a connection plate connected to the flexible cloth and the circular rod, and the circular rod is retractable into the hollow circular cylinder, to change a windward area of the flexible cloth.