如何降低通風管道的噪聲？

發布人：http://www.bnlfans.net   發布時間：2020-07-24 13:59:01

在噪聲控制要求高的場合，應選用低噪聲通風管道設備。不同型號的通風管道設備在同一的風量、風壓下、機翼型葉片的離心通風設備噪聲小，前向版型葉片的離心通風設備噪聲大。

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.

適當降低通風設備的轉速。通風設備的旋轉噪聲與葉輪圓周速度10次方成比例，渦流噪聲與葉輪圓周速度6次方(或5次方)成比例。故降低轉速可降低噪聲。

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.

設計通風系統時，應盡量減少系統的壓力損失。當通風系統的總量和壓力損失較大時，可將其分為小系統。

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.

氣流在管道內的流速不宜過高，以免引起再生噪聲。確定管道內氣流流速應根據不同要求按有關規定選取。

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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