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    • 7. 发明申请
    • COMPOSITE SHANK FOR AXIAL FAN BLADES
    • 轴向风扇叶片的复合曲柄
    • WO2009074568A2
    • 2009-06-18
    • PCT/EP2008/067098
    • 2008-12-09
    • COFIMCO S.R.L.GIORGI, EttoreBESANI, Marco
    • GIORGI, EttoreBESANI, Marco
    • F04D29/02F04D29/34F04D29/38
    • F04D29/023F04D29/34F04D29/388F05D2300/43F05D2300/603F05D2300/6034
    • 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.
    • 本发明涉及用于轴流风机叶片的轴,特别是用于大型热交换器,冷凝器,冷却塔和类似应用中的工业中使用的轴流式风机。 根据本发明的用于轴流风扇叶片的柄部允许减小柄 - 刀片组的重量并且同时相对于本领域中已知的柄部更加灵活,从而实现了减小应力的结果 在柄本身以及振动传递到风扇的整个结构上。 此外,根据本发明的刀柄的特征在于对化学侵蚀的耐受性提高,并且这也导致风扇在侵蚀性环境中工作时也有改善的可靠性。 另外,本发明的另一个目的是提供一种用于轴向风扇叶片的柄部,该柄部相对于已知类型的钢柄较轻,因此减少了柄 - 刀刃组的总重量和柄部上的弯曲应力 本身。 所有这些结果都是通过根据说明书和权利要求书由复合材料制成的柄来实现的。