Kunshan Sheng Tang ventilation introduction: industrial fan noise treatment method

Industrial fans often have some noise, often a lot of noise combined will exceed the noise emission standards. In the operation process, the noise generated by the fan is very high, generally in the range of 105 ~ 115dB (A), which is a strong noise source in the factory area of the manufacturer using this kind of equipment. The noise is far more than the requirements of Chinese "health Standards for Industrial Enterprises Design" (GBZ1-2002), seriously affect the health of workers, reduce work efficiency. According to the requirement of civilized production, the noise control of fan, which is the main noise source of manufacturers, is paid more and more attention by manufacturers. How can we reduce the noise as much as possible? Let's give you a detailed answer.

Causes of noise:

1. The noise of the motor itself: because the fan has low requirements for the motor, almost all the motors can be used as fan motors. If the motor with higher quality (can consider the motor with a level of energy efficiency) is used, the overall noise will be reduced.

2, fan impeller model: impeller blade agitates air to form air flow, the rapid flow of air will produce noise, this is the main noise source, the noise is proportional to the speed of the motor, the speed of the noise can be greatly reduced, but the exhaust air volume is small.

3, resonance problem: mechanical operation is noisy, but do not amplify the noise (like a sound box), the mechanical installation on the elastic medium (without any rigid contact with the wall), can put an end to the resonance problem.

How to solve it?

1. For the noise of the housing and motor, it can be controlled by adding sound insulation cover: using the theory of sound absorption and sound insulation, the sound level is calculated, and the sound insulation cover is set reasonably. Place the fan in the independent fan sound insulation cover.

2. Install a muffler at the exhaust air outlet with built-in muffler insert to reduce noise transmission

3. Damper spring hanger damper is used for fan hanging, and the whole vibration isolation treatment is carried out on its foundation.