| 摘要 |
PROBLEM TO BE SOLVED: To provide a blade wheel and a natural energy generator which can improve conversion efficiency in converting energy received by a blade into rotation energy and improve strength of the blade in the blade wheel.SOLUTION: A blade wheel includes a main shaft rotatable about a shaft center, supporting bodies integrated with the main shaft, and blades 24 connected to the main shaft through the supporting bodies and rotated about a shaft center concentric to the shaft center of the main shaft, by receiving wind or water. The blade 24 has a straight portion 28 extended in parallel with the main shaft, and blade tip portions 29 extended from both end portions of the straight portion 28. The cross-section of the blade tip portion 29 obtained by cutting the blade tip portion at a plane including the shaft center of the vertical main shaft, has the cross-sectional shape inclined in several stages from a base end toward a tip to approach the main shaft side.SELECTED DRAWING: Figure 3 |
