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    • 10. 发明公开
    • IMPELLER AND BLOWER
    • LAUFRAD UND GEBLES
    • EP3076022A1
    • 2016-10-05
    • EP16155019.9
    • 2016-02-10
    • Nidec Corporation
    • Hayamitsu, Ryosuke
    • F04D25/06F04D29/28F04D29/32F04D29/66
    • F04D29/281F04D17/16F04D25/02F04D25/06F04D29/053F04D29/263F04D29/329F04D29/4233F04D29/667
    • An impeller(30,130) is fixed to a shaft(41) concentric with a center axis(J) extending in an up-down direction and is rotatable about the center axis(J) together with the shaft(41). The impeller(30,130) includes a boss portion (34) which is fixed to the shaft(41) and extends in an axial direction, an impeller body portion (31), a plurality of blade portions (32) arranged on an upper surface of the impeller body portion (31), and a rib portion (35, 135) arranged on a lower surface of the impeller body portion (31). The impeller body portion (31) extends downward from an upper end of the boss portion (34) while being widened in a radial direction, and is arranged to surround the boss portion (34) in a circumferential direction. When viewed in the axial direction, a front side end portion of the rib portion (35, 135) is curved toward a rotation direction back side as the rib portion (35, 135) extends from a radial inner side toward a radial outer side.
    • 叶轮(30,130)固定在与上下方向延伸的中心轴线(J)同轴的轴(41)上,并且能够与轴(41)一起围绕中心轴线(J)旋转。 叶轮(30,130)包括固定到轴(41)并沿轴向方向延伸的凸台部分(34),叶轮本体部分(31),多个叶片部分(32) 叶轮主体部分(31)和布置在叶轮本体部分(31)的下表面上的肋部分(35,135)。 叶轮主体部31从凸台部34的上端向下方延伸,同时沿径向加宽,并且沿圆周方向包围凸台部34。 当从径向内侧向径向外侧延伸的肋部(35,135)沿轴向观察时,肋部(35,135)的前侧端部向旋转方向后侧弯曲。