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    • 26. 发明专利
    • Air quantity regulating device for centrifugal fan
    • 用于离心风机的空调数量调节装置
    • JPS59150998A
    • 1984-08-29
    • JP2289283
    • 1983-02-16
    • Babcock Hitachi Kk
    • FUKUMITSU HIROYUKISHIMONO NOBUOIGAUE KATSUHIKOSATOU SHIYUNICHIIWAI AKIKUNISEKIGUCHI MASAO
    • F04D29/46
    • F04D29/462F04D27/0253F04D29/4213F05D2250/51
    • PURPOSE:To prevent the generations of noise and vibration by a method wherein a guidance device, providing a runner with pre-rotation, is provided at the entrance of the runner for the centrifual fan so as to be capable of providing the runner with proper pre-rotation in any air quantity zone. CONSTITUTION:The guidance device 9 is provided at the entrance of the runner of the centrifugal fan and the downstream of an air quantity regulating damper 8. The guidance device is consisting of a plurality of guide plates 9a and respective guide plates 9a are fixed in substantially parallel mutually with optimum angle to provide the runner with the pre-rotation. In case the air quantity is reduced by choking the air quantity regulating damper, the guidance device 9 is independent of said damper 8, therefore, the angle of the guidance device 9 may be maintained independently of the opening degree of the damper. Accordingly, the direction of airflow is changed forcibly in the guidance device 9 into a direction in accordance with the angle of the guide plate 9 even if the direction of suction in the air quantity regulating damper 8 is any other direction, and the proper pre-rotation is provided to the runner. As a result, noise and vibration may be prevented in any zone of air quantity.
    • 目的:为了防止产生噪音和振动的方法,其中在用于离心风扇的转轮的入口处设置有提供预旋转的转轮的引导装置,以便能够为跑步者提供适当的预先 任何空气量区域的旋转。 构成:引导装置9设置在离心风扇的流道的入口处和空气量调节阻尼器8的下游。引导装置由多个导向板9a和相应的导向板9a组成,基本上 与最佳角度相互平行,以向转轮提供预旋转。 在通过阻塞空气量调节阻尼器来减少空气量的情况下,引导装置9与所述阻尼器8无关,因此可以独立于阻尼器的开度来维持引导装置9的角度。 因此,即使空调量调节风门8的吸入方向为任何其他方向,导引装置9中的气流方向也随着导向板9的角度而变化, 旋转被提供给跑步者。 结果,在空气量的任何区域都可以防止噪声和振动。