Spiral duct in the operation process will produce certain noise, if in residential and commercial areas will have a great impact on people's lives. So how can we reduce the noise in the construction process?

济南通风管道体系运转噪音通常来源于以下几个方面:

The running noise of Jinan ventilation pipe system usually comes from the following aspects:

风管的震动。因为风管资料是镀锌板或者是金属资料，在施工时要严厉按照施工验收标准选择钢板厚度和施工工艺，比如风管制造偏差、平直度、风管加固、支吊架选择及制造装置等等。到了施工阶段，出风口尽量不要靠近设备。风扇前后尽量都有5米以上的长度。假如可以添加弯头数目也可以下降噪音，风口加装过滤网，噪音操控效果也很好。

The vibration of the duct. Because the air duct information is galvanized sheet or metal information, the steel plate thickness and construction technology should be strictly selected according to the construction acceptance standard, such as the air duct manufacturing deviation, straightness, air duct reinforcement, support selection and manufacturing device, etc. At the construction stage, the air outlet should not be close to the equipment as far as possible. The front and back of the fan should be more than 5 meters long. If the number of elbows can be added, the noise can also be reduced. If the air outlet is equipped with a filter, the noise control effect is also very good.

风机的声响。处理办法我们通常可装消声器处理

The sound of the fan. We can usually install a muffler

风管中风的冲突声。通常在设计阶段就要思考噪声的问题，设计操控好管内风速，防止风声啸叫，以下是一些经历。

The clash of wind in the duct. Usually in the design stage, we need to consider the problem of noise, design and control the wind speed in the pipe to prevent the wind from whistling. Here are some experiences.

1、操控出风、回风间隔，防止空气对流时自激表象和小循环空间。

1. Control the air outlet and return air interval to prevent the self-excited appearance and small circulation space during air convection.

2、螺旋风管风机叶轮体系动平衡校调合理正常正负不大于5丝的起伏。

2. The dynamic balance adjustment of spiral duct fan impeller system is reasonable, and the fluctuation of positive and negative is no more than 5 threads.

3、软接头装置标准，防止软接帆布松垮发生风阻而形成风噪。

3. The standard of flexible joint device can prevent wind resistance and wind noise caused by loose canvas.

4、悬挂选用顺便弹簧避震专职的连接器，减轻运转时因扭力发生的跳动或共频。

4. The suspension adopts the spring shock absorber connector to reduce the runout or common frequency caused by torsion during operation.

山东通风管道

Shandong ventilation pipeline

5、螺旋风管风道转角尽量削减

5. The angle of spiral duct should be reduced as much as possible

山东通风管道风管转角缝或闭合缝有三种衔接办法：焊按、铆接和咬口衔接。因咬口衔接工艺具有强度高、严密性好、咬口缝接连均匀、不破坏板材表面质量、外形漂亮、易于完成机械化加工等突出特点而获得广泛应用，南京通风管道。

There are three ways to connect the corner seam or closing seam of Shandong ventilation pipeline: welding, riveting and biting. Because of the outstanding characteristics of high strength, good tightness, even joint, no damage to the surface quality of the plate, beautiful appearance, easy to complete mechanized processing, the biting joint technology has been widely used.

常见的转角缝咬口方式为联合角咬口、按扣式咬口和转角咬口，常见的闭合缝咬口方式为单平咬口和单立咬口。

The common corner seam bite modes are combined corner bite, button bite and corner bite, and the common closed seam bite modes are single flat bite and single vertical bite.