立式离心风机箱的噪声分为空气动力噪声和阻尼振动噪声。空气动力噪声与离心风机箱的排气量和气压尺寸有关。空气动力噪声有很多种。正常运行的离心风机箱的空气动力噪声主要有旋转噪声和涡旋噪声。

The noise of vertical centrifugal fan case is divided into aerodynamic noise and damping vibration noise. Aerodynamic noise is related to the exhaust volume and air pressure of centrifugal fan case. There are many kinds of aerodynamic noise. The aerodynamic noise of centrifugal fan case in normal operation mainly includes rotating noise and vortex noise.

旋转噪声是由于叶片敲击气体时产生的噪声，尤其是在高压离心风机和高压离心风机箱上。高压离心风机箱的旋转噪声是不可避免的。只有根据消声降噪机设备在一定程度上降低噪声，才能提高消声器，降低噪声。

The rotating noise is the noise generated when the blade strikes the gas, especially on the high-pressure centrifugal fan and high-pressure centrifugal fan case. The rotating noise of high-pressure centrifugal fan case is inevitable. Only by reducing the noise to a certain extent according to the silencing and noise reduction machine equipment, can the muffler be improved and the noise be reduced.

另一种噪声是涡旋噪声的关键产生在离心叶轮的通道和出入口。离心叶轮入口处，离心叶轮与涡壳之间必然存在间隙。气旋会根据这个间隙从涡壳的高压区流回离心叶轮，当气旋通过这个间隙时，会发出噪音。

Another kind of noise is the key of vortex noise, which is generated in the channel and inlet and outlet of centrifugal impeller. There must be a gap between the centrifugal impeller and the volute at the inlet of the centrifugal impeller. According to this gap, the cyclone will flow back to the centrifugal impeller from the high-pressure area of the vortex shell. When the cyclone passes through this gap, it will make noise.

离心叶轮出入口处，气旋从离心叶轮进入涡壳，会产生脱流，造成不规则的气旋振动，进而产生显著的噪音。在送风口安装特性阻抗复合消音器，下部是抵抗力的一部分，重要的是降低低频噪音、管道大小头和引流效果的上端是阻抗消音器，选择引流矩阵结构使其净通风口总面积利润Z大化，降低噪音。

At the inlet and outlet of the centrifugal impeller, the cyclone enters the volute from the centrifugal impeller, which will produce flow separation, cause irregular cyclone vibration, and then produce significant noise. The characteristic impedance composite muffler is installed at the air supply outlet. The lower part is a part of the resistance. It is important to reduce low-frequency noise, pipe size and drainage effect. The upper end is the impedance muffler. The drainage matrix structure is selected to maximize the profit Z of the total area of the net vent and reduce noise.

宇淇通成风机认为除此之外，机械设备的噪声主要是由离心风机零部件等多功能问题引起的阻尼振动引起的机械设备噪声只需搜索损坏的零部件并立即更换即可。

Yuqi Tongcheng fan believes that in addition, the noise of mechanical equipment is mainly caused by damping vibration caused by multi-functional problems such as centrifugal fan parts. Just search the damaged parts and replace them immediately.

立式离心风机箱的自然环境一定要保持干净整洁，离心风机表面一定要保持干净整洁，进风口和通风口不应有污垢，离心风机和管道中的灰尘等污垢应及时解决。立式离心风机箱只有在正常情况下才能运行。朋友要保证供电系统设备容积充足，工作电压稳定，禁止断相运行。供电系统路线一定是专用线路，临时线路供电系统不能长期使用。

The natural environment of the vertical centrifugal fan case must be kept clean and tidy, the surface of the centrifugal fan must be kept clean and tidy, the air inlet and vent shall be free of dirt, and the dust and other dirt in the centrifugal fan and pipeline shall be solved in time. The vertical centrifugal fan box can only operate under normal conditions. Friends should ensure that the equipment volume of the power supply system is sufficient and the working voltage is stable. Open phase operation is prohibited. The power supply system must be a special line, and the temporary line power supply system cannot be used for a long time.

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