通風管道設要注意哪些細節

發布人：http://www.bnlfans.net   發布時間：2020-05-14 15:10:07

1.下降通風機聲源噪聲

1. Reduce the sound source noise of ventilator

(1)合理選擇通風機的機型。在噪聲控制要求高的場合，應選用低噪聲通風機。不同類型的通風機，在同樣的風量、風壓下，機翼型葉片的離心通風機噪聲小，前向板型葉片的離心通風機噪聲大。

(1) Select the type of ventilator reasonably. Low noise fan should be used in the situation of high noise control requirements. For different types of fans, under the same air volume and wind pressure, the centrifugal fan with wing blade has less noise, and the centrifugal fan with forward plate blade has more noise.

(2)通風機的作業點應挨近更率點。同一類型的通風機效北越高，噪聲越小。為使通風機的運行工況點保持在通風機的率區，應盡量避免用閥門進行工況調節。如必須在通風機壓出端設閥門時，其設置的位置是距通風機出口1m處。它能使2000Hz以下的噪聲下降。在通風機入口處氣流應保持均勻。

(2) The operation point of ventilator shall be close to the highest efficiency point. The higher the fan efficiency is in the north, the lower the noise is. In order to keep the operating point of the fan in the high efficiency area of the fan, it is necessary to avoid using the valve to adjust the operating point as much as possible. If it is necessary to set a valve at the press out end of the ventilator, the best position is 1 m away from the outlet of the ventilator. It can reduce the noise below 2000 Hz. The air flow shall be uniform at the fan inlet.

(3)在或許條件下恰當下降通風機的轉速。通風機的旋轉噪聲與葉輪圓周速度10次方成份額，渦流噪聲與葉輪圓周速度6次方(或5次方)成份額。故下降轉速可下降噪聲。

(3) Reduce the fan speed properly under possible conditions. The rotating noise of the fan and the peripheral speed of the impeller are 10 times of the component amount, and the eddy noise and the peripheral speed of the impeller are 6 times (or 5 times) of the component amount. Therefore, reducing the speed can reduce the noise.

(4)通風機進、出口的噪聲級是通風理、風壓添加而增大的。因此，設計通風體系時，應盡量削減體系的壓力丟失。當通風體系的總風量和壓力丟失較大時，可將其分為小體系。

(4) The noise level of fan inlet and outlet is increased by the addition of ventilation principle and air pressure. Therefore, when designing the ventilation system, the pressure loss of the system should be reduced as much as possible. When the total air volume and pressure loss of ventilation system is large, it can be divided into small systems.

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

(5) The velocity of air flow in the pipeline should not be too high to avoid regeneration noise. The flow velocity in the pipeline shall be determined according to different requirements and relevant regulations.

(6)留意通風機與電動機的傳動方法。選用直聯傳動的通風機噪聲更小，用聯軸器的次之，用沒有接縫的三角皮帶傳動的稍差。通風機應配用低噪聲的電動機。

(6) Pay attention to the driving method of fan and motor. The fan with direct drive has the least noise, the second with coupling, and the second with triangle belt without joint. Fans shall be equipped with low-noise motors.

2.傳遞途徑上對通風機噪聲抑制

2. Noise suppression of ventilator in the transmission way

(1)在通風機的進、出風口上裝配恰當的消聲器。

(1) Install appropriate muffler on the air inlet and outlet of the ventilator.

(2)通風機設減振基座，進、出風口用軟管聯接。

(2) The fan is equipped with a damping base, and the air inlet and outlet are connected with hoses.

(3)對通風機做隔聲處理。如設置通風機隔聲罩；在通風機機殼內襯只聲資料；將通風機設置在專門的通風機室內，并設置隔聲門、 隔聲窗或設置其他吸聲設施，或在通風機室內另設值班室等。

(3) Conduct sound insulation treatment for the fan. For example, the fan sound insulation cover shall be set up; the fan shell shall be lined with sound only data; the fan shall be set up in a special fan room, and sound insulation doors, sound insulation windows or other sound absorption facilities shall be set up, or another duty room shall be set up in the fan room.

(4)通風機室的進、排氣通道采納消聲辦法。

(4) Silencing method shall be adopted for the air inlet and exhaust channels of the fan room.

(5)將通風機室布置在遠離要求安靜的房間。

(5) Arrange the fan room away from the room requiring quiet.

3.及時保護保養，定期檢保護，及時更換破損零部件，排除反常，以發明低噪聲運行條件。

3. Timely protection and maintenance, regular inspection and protection, timely replacement of damaged parts and components, elimination of abnormalities, in order to create low-noise operation conditions.

以上就是對濟南通風管道的的詳細介紹，想要了解更多請點擊官網http://www.bnlfans.net

The above is a detailed introduction of Jinan ventilation pipeline. For more information, please click http://www.bnlfans.net