Cooling fan
    9.
    发明授权
    Cooling fan 有权
    冷风扇

    公开(公告)号:US07922465B2

    公开(公告)日:2011-04-12

    申请号:US11964790

    申请日:2007-12-27

    IPC分类号: F04B35/04

    CPC分类号: F04D29/626

    摘要: A cooling fan includes a fan housing (10) having a central tube (11) extending upwardly therefrom, a bearing (20) received in the central tube, a stator (40) mounted around the central tube, a rotor (30) having a shaft (37) extending into the bearing, and a magnetic ring (38) being fixedly mounted to the rotor to rotate with the rotor during operation of the cooling fan. The bearing is made of iron-copper alloy. The magnetic ring is made of hard magnetic material and exerts a magnetic attraction on the bearing, whereby the rotor is pulled downwardly by a magnetic attraction of the bearing on the magnetic ring to lessen the floating problem of the rotor during operation of the cooling fan.

    摘要翻译: 冷却风扇包括风扇壳体(10),其具有从其向上延伸的中心管(11),容纳在中心管中的轴承(20),围绕中心管安装的定子(40),转子(30),其具有 轴(37)延伸到轴承中,并且在冷却风扇的操作期间,固定地安装到转子以与转子一起旋转的磁环(38)。 轴承由铁 - 铜合金制成。 磁环由硬磁性材料制成,并对轴承施加磁吸引力,由此通过磁环上的轴承的磁吸引将转子向下拉,以减轻冷却风扇运转期间转子的浮动问题。