Give you a brief introduction to introduce: What are the noise reduction methods of Roots fans in the chemical industry?

Industrial commonly used fans are centrifugal fans, axial fans, Roots fans, sewage treatment fans, air conditioning fans, dust removal fans, power station fans and so on. No matter which kind of fan produces noise during operation, it will affect the normal work and rest of workers and surrounding residents. The following Jiangsu Weigu fluid from the industrial Roots fan to share some treatment methods.

Roots fans contain a variety of noise sources:

Aerodynamic noise radiated by inlet and outlet; Housing and motor, bearing and other radiation of mechanical noise; Vibration radiated solid noise. In this noise, aerodynamic noise is a more important part of the treatment process, other such as mechanical noise, electromagnetic noise, etc., under the premise of normal operation of the fan are not necessary. According to the noise spectrum analysis of Roots fan, it is characterized by low frequency broadband. The aerodynamic noise of the fan mainly consists of two parts: torsion noise and eddy current noise.

Chemical industry with Roots fan noise treatment methods:

1, the noise control of Roots fan is to prevent and reduce the noise radiation generated by the noise source, improve the aerodynamic fan design, select the appropriate device and operation method, can effectively reduce the noise generated by Roots fan.

2, the limitation method is to improve the assembly accuracy; Replace the old ball bearings or replace the bearings with plain bearings so that the rotor is in a dynamic equilibrium state; Connect motor and fan with elastic coupling; In order to improve the maintenance and protection of equipment, in addition to smoothing oil, tightening bolts, replacing damaged parts, etc.

3, install noise muffler. In general, the aerodynamic noise radiated by the inlet and outlet is 10-20 decibels higher than the starting noise emitted by other components. Therefore, when controlling fan noise, silencers need to be installed in the intake pipe and exhaust pipe, and silencers should be used in the fan.

4, the installation of sound insulation cover, that is, the whole fan unit is wrapped in a closed sound insulation cover. This method should pay attention to ensure the normal operation of the fan.