| 摘要 |
A vertical axis type wind/water turbine mainly consists of rotationally symmetric vanes which are secured at both ends thereof to supporting plates, the vane being made up of several blades, the blade having one vertical side being attached to a blade rotating shaft, the other free side being individually allowed to rotate freely in the shape of a sector between both the adjacent blade rotating shafts. When the vane of the wind/water turbine is convex against a wind/water flow, the blades are pushed and opened by the wind/water flow to reduce rotational resistance. When the vane is further rotated to be concave, the blades block between the blade rotating shafts and allow the entire face of the vane to be subjected to a wind/water pressure, providing a high rotational force with the rotational resistance reduced. To avoid risk, the foot of all the blades can be only wound around or retreated to the blade rotating shaft to make the horizontal sides of the blade shorter than the interval between both the adjacent blade rotating shafts. This allows the blades to freely rotate 360 degrees about the blade rotating shaft to lose the rotational force of the wind/water turbine, thereby significantly reducing the overall resistance and thus making it possible to avoid risk. |
