今天小编给大家介绍下关于通风管道是如何降低噪音的:
Today, I'd like to introduce to you how ventilation ducts reduce noise:
一.降低通风设备声源噪声
I Reduce the sound source noise of ventilation equipment
（1）合理选择通风设备的机型。在噪声控制要求高的场合，应选用低噪声通风设备。不同型号的通风设备在同意的风量、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。
(1) Reasonably select the type of ventilation equipment. Low noise ventilation equipment shall be selected for occasions with high noise control requirements. Under the agreed air volume and pressure of different types of ventilation equipment, the noise of centrifugal ventilation equipment with wing blade is small, and the noise of centrifugal ventilation equipment with forward plate blade is large.
（2）通风设备的工作点应接近效率高点。同一型号的通风设备效率越高，噪声越小。
(2) The working point of ventilation equipment shall be close to the high efficiency point. The higher the efficiency of ventilation equipment of the same model, the lower the noise.
（3）在可能条件下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。
(3) If possible, reduce the speed of ventilation equipment appropriately. The rotating noise of ventilation equipment is proportional to the 10th power of impeller circumferential speed, and the eddy current noise is proportional to the 6th power (or 5th power) of impeller circumferential speed. Therefore, reducing the speed can reduce the noise.
（4）通风设备进、出口的噪声级是通风理、风压曾加加大。因此，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。
(4) The noise level at the inlet and outlet of ventilation equipment is that the ventilation principle and wind pressure have increased. Therefore, when designing the ventilation system, the pressure loss of the system should be minimized. When the total amount and pressure loss of the ventilation system are large, it can be divided into small systems.
（5）气流在管道内的流速不宜过高，以免引起再次产生噪声。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 flow rate of air flow in the pipeline should not be too high to avoid generating noise again. To determine the air flow velocity in the pipeline, it shall be selected according to different requirements and relevant regulations.
（6）注意通风设备与电动机的传动方式。采用直联传动的通风设备噪声小，用联轴器的次之，用没有接缝的三角皮带传动的稍差。通风设备应配用低噪声的电动机。
(6) Pay attention to the transmission mode of ventilation equipment and motor. The ventilation equipment driven by direct coupling has low noise, followed by coupling, and the one driven by V-belt without joint is slightly worse. Ventilation equipment shall be equipped with low-noise motor.
二.传递途径上对通风设备噪声减小
II Reduce the noise of ventilation equipment in the transmission way
（1）在通风设备的进、出风口上装配恰当的消声器。
(1) Install proper mufflers on the air inlets and outlets of ventilation equipment.
（2）通风设备设减振基座，进、出风口用软管连接。
(2) The ventilation equipment is equipped with a damping base, and the air inlet and outlet are connected with hoses.
（3）对通风设备做隔声处理。如设备通风设备隔声罩；在通风设备机壳内衬只声材料；将通风设备设置在专门的通风设备室内，并设置隔声门、隔声窗或设置其他吸声设施，或在通风设备室内另设值班室等。
(3) Make sound insulation treatment for ventilation equipment. Such as ventilation equipment and sound insulation cover; Lining the enclosure of ventilation equipment with acoustic materials; Set the ventilation equipment in the special ventilation equipment room, and set sound insulation doors, sound insulation windows or other sound-absorbing facilities, or set another duty room in the ventilation equipment room.
（4）通风设备室的进、排气通道采取声措施。
(4) Acoustic measures shall be taken for the inlet and exhaust channels of the ventilation equipment room.
（5）将通风设备布置在远离要求安静的房间。
(5) Place ventilation away from rooms requiring quiet.
三.及时维护通风管道保养，定期检维护，及时更换破损零部件，排除异常，以创造低噪声运行条件。
III Timely maintain the ventilation duct, conduct regular inspection and maintenance, timely replace damaged parts and eliminate abnormalities, so as to create low-noise operation conditions.
The above is the detailed introduction of Jinan ventilation duct. I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service http://www.jntfgd.com
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