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    • 10. 发明专利
    • Fan
    • 风扇
    • JP2013155651A
    • 2013-08-15
    • JP2012016255
    • 2012-01-30
    • Minebea Co Ltdミネベア株式会社
    • MASHIMA TAKANORIKAWAI YOICHI
    • F04D29/32F04D29/66
    • F04D19/002F04D25/0613F04D29/662
    • PROBLEM TO BE SOLVED: To provide a fan for effectively preventing a balance weight, which is mounted by filling thereof in a recess provided in a rotor, from coming off from recess during or after adjustment of rotation balance.SOLUTION: A fan includes: a rotor 20 consisting of an impeller 23, in which blades 22 are provided on an outer circumferential part of a hub 21, and a shaft 10 provided at the center of the hub 21, and is freely rotatably supported around the shaft 10 as a center; and a recess 40, which is formed in a surface 212 across the axial direction of the hub 21, and filled with a clay-like weight (balance weight) 70 such as putty. The recess 40 includes: a first area 41 which is arranged on the same circumference and extends substantially in the circumferential direction; and a second area 42 which is formed continuously on the outer circumferential side of the first area 41 while its circumferential length is shorter than that of the first area 41. The weight 70 is filled at least in the second area 42 to adjust rotation balance, and the weight 70 is prevented from coming off by tightly attaching the weight 70 to wall surfaces 421, 422 along the radial direction in the second area 42.
    • 要解决的问题:提供一种用于有效地防止通过将其填充在设置在转子中的凹部中而安装的平衡重的风扇在旋转平衡期间或之后从凹部脱离。解决方案:风扇包括: 转子20由叶轮23组成,其中叶片22设置在轮毂21的外周部分上,轴10设置在轮毂21的中心,并且以轴10为中心可自由旋转地支撑。 以及凹部40,其形成在表面212中,跨越轮毂21的轴向,并且填充有诸如油灰的粘土状重量(平衡重)70。 凹部40包括:第一区域41,其布置在相同的圆周上并且基本上在圆周方向上延伸; 以及第二区域42,其在第一区域41的外周侧上连续地形成,同时其周长短于第一区域41。重量70至少填充在第二区域42中以调节旋转平衡, 并且通过在第二区域42中沿着径向方向紧紧地将重物70附接到壁表面421,422而防止重物70脱落。