| 摘要 |
The present invention relates to a shank for axial fan blades, in particular for axial fans used in industry in large heat exchangers, condensers, cooling towers and similar applications. The shank for axial fan blades according to the present invention allows to reduce the weight of the shank-blade group and at the same time it is more flexible with respect to the shanks known in the art, thus achieving the result consisting of reducing the stresses on the shank itself and the vibrations transmitted to the whole structure of the fan. Moreover, the shank according to the present invention is characterized by an improved resistance to chemical attack, and this results in an improved liability of the fan also when it is working in aggressive environment. Not least, another object achieved by the present invention is to provide a shank for axial fan blades which is lighter with respect to the known type of steel shank, thus reducing the total weight of the shank-blade group and the bending stress on the shank itself. All these results are achieved by the shank made of composite materials as per the description and the claims. |
