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    • 24. 发明申请
    • Centrifugal Blower
    • 离心式鼓风机
    • US20100226766A1
    • 2010-09-09
    • US12224442
    • 2008-05-08
    • Tsuyoshi EguchiAtsushi SuzukiMitsuhiro NakaoTetsuo Tominaga
    • Tsuyoshi EguchiAtsushi SuzukiMitsuhiro NakaoTetsuo Tominaga
    • F04D29/44
    • F04D29/663F04D29/422F04D29/4226F05D2250/232
    • It is intended to provide a centrifugal blower capable of suppressing the generation of noise including periodic noise that is caused by interference between a tongue and an impeller. The centrifugal blower is provided with an impeller (2) provided with plural blades around a rotating shaft; a casing (3) which houses the impeller (2) and has a suction portion at one end in an axial line direction of the rotating shaft; a spiral flow passage (4) formed around the impeller (2) in the casing (3); and a tongue (6) for suppressing inflow of air from a winding end to a winding origin of the spiral flow passage (4). The centrifugal blower is characterized in that an extension (20) is provided at a tip of the tongue (6) in a reverse rotational direction that is reverse to a rotational direction of the impeller (2) in such a manner that it projects in the reverse rotational direction by a length that varies depending on the position in the axial line direction and that the gap between itself and the impeller (2) in the radial direction of the impeller (2) is kept approximately constant.
    • 旨在提供一种能够抑制噪声的产生的离心鼓风机,包括由舌片和叶轮之间的干扰引起的周期性噪声。 离心式鼓风机设置有围绕旋转轴设置有多个叶片的叶轮(2) 壳体(3),其容纳所述叶轮(2),并且在所述旋转轴的轴线方向上的一端具有吸引部; 围绕所述壳体(3)中的叶轮(2)形成的螺旋流动通道(4); 以及用于抑制空气从螺旋流路(4)的卷绕端到卷绕原点的流入的舌部(6)。 离心式鼓风机的特征在于,在与叶轮(2)的旋转方向相反的反向旋转方向上,在舌部(6)的前端设置有延伸部(20) 反转旋转方向取决于轴线方向上的位置而变化的长度,并且其与叶轮(2)在叶轮(2)的径向方向上的间隙保持大致恒定。