How to reduce sound source noise of ventilation equipment?

(1) a reasonable choice of models. Noise control requirements in the high occasions, should use low-noise ventilation equipment. Different types of ventilation equipment, in the same amount of wind, wind pressure, wing-type centrifugal ventilation equipment leaves a small noise, forward-plate leaves centrifugal noise.

(2) Ventilation equipment operating point should be close to the highest efficiency point. The same type of ventilation equipment, the higher the efficiency, the smaller the noise. Ventilation equipment room of the intake and exhaust channels to reduce noise measures.

(3) under the conditions appropriate to reduce the speed of ventilation equipment. The rotating noise of the ventilation equipment is proportional to the impeller's peripheral speed of 10 times, and the eddy current noise is proportional to the impeller's peripheral speed of 6th power (or 5th power). So reduce the speed can reduce noise.

(4) ventilation equipment inlet and outlet noise level is ventilation, air pressure increases and increases. Therefore, the design of ventilation systems, the system should minimize the pressure loss. When the total air volume and pressure loss of the ventilation system is large, it can be divided into small systems.

(5) air flow in the pipe flow rate should not be too high, so as not to cause regeneration noise. Determine the air flow within the pipeline should be based on different requirements in accordance with the relevant provisions of the election.

(6) pay attention to ventilation and motor drive mode. Direct-drive transmission of the ventilation equipment with the minimum noise, followed by the coupling, with no seam V-belt drive slightly worse. Ventilation equipment should be equipped with low-noise motor.