| 摘要 |
In a wind energy convertor comprising an upstanding support, a fan 14 and a turbine 10 rotatably mounted about the vertical axis of the support and, above the fan and turbine, an annular body 3 whose upper surface 7 is so shaped as to cause the velocity of the wind blowing against the surface to increase as it passes over the surface, the upstanding support comprises a plurality of upstanding elongate members 1 uniformly spaced around the fan and turbine. The upstanding members may be the legs of a lattice work tower but, preferably, they are vertical columns 1 with respect to which the annular body 3 is so mounted that the annular body, and the fan 14 and turbine 10 carried thereby, can be raised or lowered when required, the vertical columns having associated means 17 for raising and lowering the annular body with respect to the columns and for locking the annular body with respect to the columns when it is in the desired position. |
