如何降低通風(fēng)管道的噪聲？

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在噪聲控制要求高的場(chǎng)合，應(yīng)選用低噪聲通風(fēng)管道設(shè)備。不同型號(hào)的通風(fēng)管道設(shè)備在同一的風(fēng)量、風(fēng)壓下、機(jī)翼型葉片的離心通風(fēng)設(shè)備噪聲小，前向版型葉片的離心通風(fēng)設(shè)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(dāng)降低通風(fēng)設(shè)備的轉(zhuǎn)速。通風(fēng)設(shè)備的旋轉(zhuǎn)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(zhuǎn)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(shè)計(jì)通風(fēng)系統(tǒng)時(shí)，應(yīng)盡量減少系統(tǒng)的壓力損失。當(dāng)通風(fēng)系統(tǒng)的總量和壓力損失較大時(shí)，可將其分為小系統(tǒng)。

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(nèi)的流速不宜過高，以免引起再生噪聲。確定管道內(nèi)氣流流速應(yīng)根據(jù)不同要求按有關(guān)規(guī)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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