Two kinds of noise produced by glass fiber reinforced plastic negative pressure fan

The noise generated by the negative pressure fan can be divided into two types. One is the own equipment factor, that is, the noise of the body, especially the vibration noise generated during the operation of the fan; the second type of wind noise, the air outlet nozzle The noise radiates outward through the air, which has a huge impact on the surrounding environment.China External Rotor Motor axial Fans manufacturers

1.We can start from the structure and choose according to the negative pressure fan model to reduce the noise of the product.
When choosing a negative pressure fan model, first look at whether the designed structure is reasonable, compare carefully, and decide according to production needs. If it is in a residential area, first of all, you still need to choose some low noise (optimized structure) The model controls the noise level of the negative pressure fan.

2. The efficiency of the negative pressure fan is a very critical point. The efficiency of the negative pressure fan is a very critical point. The motor efficiency of the fan is generally 50%-90%. The larger the fan, the higher the motor efficiency. We require that the negative pressure fan and the ventilation cooling equipment in the ventilation project must be close to the highest efficiency once they are in operation. The negative pressure fan of the same model basically shows the higher the efficiency and the lower the noise.

3. Controlling the speed of the negative pressure fan to reduce the noise The control of the speed of the negative pressure fan is a more critical point. Once it is found that the speed of the negative pressure fan does not match the environment itself, the first thing that needs to be changed is the speed of the negative pressure fan, because once the speed is lowered, it can also reduce the noise.

4. Increase the bypass pipe and reduce the gas flow rate in the pipeline. It is a key point to reduce the flow rate of the gas in the wind noise pipeline. The flow rate should not be too high, which will cause more intense noise. The flow rate of the gas in the pipeline should be selected in accordance with the regulations according to different requirements. In addition, the flow and pressure in the air duct can be dispersed by increasing the air duct to reduce noise at the end of the air outlet.