Generally, we solve this kind of noise mainly by using a silencer, that is, the noise coming out of the dust collector in the process of running first through the silencer, and then into the pipeline, so as to avoid the noise of the dust collector directly from the inlet and outlet to the outside, and also reduce the noise coming out through the wall of the pipe. The noise of the dust collector is mainly generated by the fan. According to the site situation, the solid sound transmission of the machine body noise and vibration of the fan should also be paid attention to. Non-metallic compensators can be used to reduce the linkage of pipelines and reduce the noise. Axial flow fans make a lot of noise when working, and the noise of fans increases with the increase of air volume and wind pressure.

 

 

Generally, there are several ways to solve the noise problem of the fan:

 

1. In order to reduce the excitation force of the noise of the dust collector, factors of reducing the noise source of the dust collector should be considered in the design of the dust collector fan. Therefore, in terms of aerodynamic performance, the shock of airflow and separation of accessory surfaces should be minimized to prevent or reduce the generation of noise and eddy current noise.

 

2. The piping design of the dust collector shall prevent the sharp protrusion and sharp turning of the flow passage part.

 

3, choose the right size of the rotation of the dust collector fan, pay great attention to control the gap between the impeller and the wind tongue, the gap is too small will increase the noise.

 

4. The noise from the housing and motor can be solved by installing sound insulation cover. The fan is placed in an independent sound insulation room, and the non-metallic skin is used for sound absorption and sound insulation.

 

5. A muffler shall be installed outside the fan exhaust outlet and a built-in muffler shall be used to reduce noise when passing through the muffler of special structure. The muffler is an effective measure to reduce the noise from the intake and exhaust port of the aerodynamic equipment.

 

6. The louvres outside the ground layer should be muffled louvres as much as possible.

 

7. Fan hanger adopts damping spring damper.

 

8. Make targeted design according to sound source objects, noise characteristics, noise reduction requirements, process conditions, installation location and other factors to ensure good noise reduction effect

 

9. The installation of non-metallic soft connection at the inlet and outlet of the fan can better reduce vibration linkage and noise, which is also a popular method at present.