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通风管道设要注意哪些细节

发布人:   发布时间:2020-05-14 15:10:07

1.下降通风机声源噪声

1. Reduce the sound source noise of ventilator

(1)合理选择通风机的机型。在噪声控制要求高的场合,应选用低噪声通风机。不同类型的通风机,在同样的风量、风压下,机翼型叶片的离心通风机噪声小,前向板型叶片的离心通风机噪声大。

(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)通风机的作业点应挨近更率点。同一类型的通风机效北越高,噪声越小。为使通风机的运行工况点保持在通风机的率区,应尽量避免用阀门进行工况调节。如必须在通风机压出端设阀门时,其设置的位置是距通风机出口1m处。它能使2000Hz以下的噪声下降。在通风机入口处气流应保持均匀。

(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.

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(3)在或许条件下恰当下降通风机的转速。通风机的旋转噪声与叶轮圆周速度10次方成份额,涡流噪声与叶轮圆周速度6次方(或5次方)成份额。故下降转速可下降噪声。

(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)通风机进、出口的噪声级是通风理、风压添加而增大的。因此,设计通风体系时,应尽量削减体系的压力丢失。当通风体系的总风量和压力丢失较大时,可将其分为小体系。

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

(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)留意通风机与电动机的传动方法。选用直联传动的通风机噪声更小,用联轴器的次之,用没有接缝的三角皮带传动的稍差。通风机应配用低噪声的电动机。

(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.传递途径上对通风机噪声抑制

2. Noise suppression of ventilator in the transmission way

(1)在通风机的进、出风口上装配恰当的消声器。

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

(2)通风机设减振基座,进、出风口用软管联接。

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

(3)对通风机做隔声处理。如设置通风机隔声罩;在通风机机壳内衬只声资料;将通风机设置在专门的通风机室内,并设置隔声门、 隔声窗或设置其他吸声设施,或在通风机室内另设值班室等。

(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)通风机室的进、排气通道采纳消声办法。

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

(5)将通风机室布置在远离要求安静的房间。

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

3.及时保护保养,定期检保护,及时更换破损零部件,排除反常,以发明低噪声运行条件。

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.

以上就是对济南通风管道的的详细先容,想要了解更多请点击官网

The above is a detailed introduction of Jinan ventilation pipeline. For more information, please click


 

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