| 摘要 |
<p>A Savonius vertical axis wind turbine rotor [and spoke for it] is versatil e, simple and easy to construct and assemble, and efficient. The rotor includes a plurality of spokes, a plurality of vanes, and fasteners. Each spoke (which may be laser cut from aluminum plate) includes a hub having a substantially central opening, a plurality of at least partially arcuate ribs extending substantially radially outwardly from the hub with inner and outer surfaces, and a plurali ty of channels defined in at least one surface (preferably the outer surface) of each rib. The vanes are of sheet material (e. g. aluminum) generally conforming t o an inner or outer surface of a rib and have openings operatively aligned with t he channels. First fasteners pass through the openings into the channels and cooperate with second fasteners provided within the channels to securely hol d the vanes to the ribs; the fasteners are preferably removable. The hub may b e connected to a shaft of the rotor/turbine in a number of different ways. In a preferred way, each hub defines a clamp adapted to cooperate with a shaft so that the hub is securely affixed to the shaft. The clamp includes a substantially radial slot in the hub communicating with the central opening, first and second fastener receiving elements on opposite sides of the slot and fixed to the hub, and a fastener extending between the fastener receiving elements to narrow o r close the slot. Preferably the at least partially curved vanes generally conform to the outer surfaces of the ribs, and the vanes may overlap the central openin g so that there is spillover from one vane to the next when the rotor is rotated by wind.</p> |
