Noise control of cooling tower

Noise treatment methods of cooling tower include sound insulation, noise elimination and vibration isolation.

1, sound insulation

The sound insulation screen plays a sound insulation role for the direct sound of the cooling tower, which helps to protect the residents near the noise source. The installation position of sound insulation screen is generally selected near the sound source or sound receiving point. The sound insulation screen should be high enough, so the better the noise reduction effect.

2. Noise elimination

In order to reduce the noise of the fan, silencers are installed at the inlet and outlet of the fan. The muffler at the inlet and outlet is attached with a sound insulation screen to make it a local vent of the sound insulation screen, which can not only ensure that the setting of the sound insulation screen will not affect the air intake of the cooling tower and ensure the cooling effect, but also play the due role of the muffler.

3. Vibration isolation

Install a shock absorber on the foundation of the equipment, so that the rigid connection between the equipment and the foundation becomes an elastic support. Vibration isolation equipment should be selected according to vibration isolation requirements, location and allowable space. A movable base is designed, and an elastic shock absorber is installed on the base of the cooling tower to reduce the influence of vibration caused by the operation of the cooling tower.

Introduction of noise source of cooling tower;

1, the blade is too long, resulting in friction noise when contacting with the cooling inner wall. This kind of friction will not only produce annoying noise, but also wear the blades, leading to the failure of the cooling tower.

2. If the blades are improperly installed, the blades will generally be connected to the rotating shaft through bolts. However, if the bolts are not tight enough, the blades will generate uneven airflow because they are too loose, thus generating noise.

3. The rotating shaft of the fan blade is unbalanced. If the angle of the fan blade is not adjusted properly, it will be unbalanced.

4. There is too little lubricating oil in the retarder. Lubrication can make the shaft rotate smoothly and it is not easy to produce noise.

5. Bearing failure (motor or reducer).