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如何降低通风管道的噪声?

发布人:   发布时间:2020-07-24 13:59:01

在噪声控制要求高的场合,应选用低噪声通风管道设备。不同型号的通风管道设备在同一的风量、风压下、机翼型叶片的离心通风设备噪声小,前向版型叶片的离心通风设备噪声大。

Low noise ventilation duct equipment should be selected in the high noise control situation. Under the same air volume and wind pressure, the noise of centrifugal fan with wing blade is lower than that with forward blade.

适当降低通风设备的转速。通风设备的旋转噪声与叶轮圆周速度10次方成比例,涡流噪声与叶轮圆周速度6次方(或5次方)成比例。故降低转速可降低噪声。

Reduce the speed of ventilation equipment properly. The rotating noise of ventilation equipment is proportional to the 10th power of impeller circumferential speed, and the eddy noise is proportional to the 6th power (or 5th power) of impeller circumferential speed. Therefore, the noise can be reduced by reducing the rotating speed.

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设计通风系统时,应尽量减少系统的压力损失。当通风系统的总量和压力损失较大时,可将其分为小系统。

When designing the ventilation system, the pressure loss of the system should be minimized. When the total amount and pressure loss of ventilation system are large, it can be divided into small systems.

气流在管道内的流速不宜过高,以免引起再生噪声。确定管道内气流流速应根据不同要求按有关规定选取。

The velocity of airflow in the pipe should not be too high to avoid regeneration noise. The flow velocity in the pipeline should be selected according to different requirements and relevant regulations.

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