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    • 4. 发明授权
    • Blower
    • 鼓风机
    • US07331758B2
    • 2008-02-19
    • US10521787
    • 2004-06-17
    • Masahiro ArinagaKunihiko KagaShoji YamadaKatsuhisa OotsutaHitoshi KikuchiYoshimi IwamuraYasuyoshi Makino
    • Masahiro ArinagaKunihiko KagaShoji YamadaKatsuhisa OotsutaHitoshi KikuchiYoshimi IwamuraYasuyoshi Makino
    • F04D29/54
    • F04D17/06F04D29/386
    • A blower includes: an impeller on which there are arranged axial flow blades 40 mounted at circumferential intervals to an outer peripheral surface of a boss; a case surrounding the impeller; and a bell mouth cylindrically constricted to guide gas into the case, wherein an inner diameter of the bell mouth is smaller than an outer diameter of the impeller. Further, each blade has, in the radial direction, a sweepforward wing portion situated on the boss side and exhibiting a positive advance ratio value, and a sweepback wing portion situated on the outer peripheral side of the blade and exhibiting a negative advance ratio value, with the arc length of each blade increasing from the boss side toward the outer peripheral side. Therefore, it is possible to achieve an improvement in ventilation efficiently, through an increase in static pressure and to achieve a reduction in noise.
    • 鼓风机包括:叶轮,其上布置有轴向流动叶片40,其周向间隔安装到凸台的外周表面; 围绕叶轮的壳体; 以及圆筒形收缩的喇叭口,以将气体引导到壳体中,其中喇叭口的内径小于叶轮的外径。 此外,每个叶片在径向方向上具有位于凸台侧并且呈现正前进比值的前掠翼部,以及位于叶片的外周侧并且呈现负提前比值的回扫翼部, 每个叶片的弧长度从凸台侧向外周侧增加。 因此,可以通过增加静压而有效地实现通气的改善,并且能够实现噪音的降低。