Roots blower reducing noise mthods

Roots blower in the work and operation of some normal noise is a normal phenomenon, as long as there is no abnormal change in the sound, generally do not need to worry, if the working environment needs to be quiet, some noise elimination equipment can be adopted. Roots blower is a typical positive displacement blower, which changes the mechanical energy added by prime mover into gas pressure and kinetic energy depending on the change of rotor volume.

Compared with centrifugal blower, roots blower has many advantages, such as high head, little influence of flow resistance and stable air supply. However, there are some disadvantages in the process of using, such as low efficiency and high noise. The maintenance and installation of fan play an important role in reducing noise. Therefore, roots blower should be taken good care of.

The mechanism of noise generation of Roots blower is because there are different noise sources in the fan, but the generated parts are different, including:

1. Aerodynamic noise of input and output ports;

2. The noise produced by the mechanical chassis and the engine is radiative;

3. Basic sound radiation of solid sound. Among these partial noises, the aerodynamic noise (called aerodynamic noise) emitted by the input and output points is the strongest, while other noises such as mechanical noise and electromagnetic noise are the secondary factors for the normal operation of the fan. By analyzing the spectrum of the noise produced by Roots fan, it is found that its characteristic is low bandwidth. The noise of pneumatic fan consists of two parts: rotating noise and vortex noise.

Roots blower will produce noise in production and use. Roots blower contains a variety of noise sources, and the main parts of noise are as follows:

1. Aerodynamic noise radiated from the inlet and outlet;

2. Mechanical noise radiated by the casing, motor, bearing, etc;

3. Solid sound radiated by foundation vibration;

How to reduce the noise of Roots blower:

1. Install a muffler at the exhaust outlet of Roots blower, with built-in silencing insert.

2. Add sound insulation cover to roots blower fan to solve the noise of casing and motor. (the sound insulation cover of the fan shall not only meet the sound insulation requirements, but also meet the ventilation and heat dissipation requirements of the fan itself)

3. The whole vibration isolation treatment is carried out for the fan foundation.

Roots blower is a typical positive displacement blower. It changes the mechanical energy added by the prime mover into the pressure and kinetic energy of gas by the change of rotor volume. The advantages of Roots blower are high pressure head, low flow rate affected by resistance, stable air supply and other advantages. However, it is generally low efficiency and high noise in the process of use.

I believe that after you have read the above content, you should also have some understanding of the way to reduce the noise of roots blower. I hope it will be helpful to you.