The noise of industrial cooling fan mainly includes two parts, aerodynamic noise and mechanical noise, in which the intensity of aerodynamic noise is the largest, and it is the main part of the noise of centrifugal fan. Let's look at how to reduce the noise of industrial air coolers. Ningbo Air Cooler, Ningbo Air Cooler

(1) Reasonable selection of industrial cooling fan models. In the case of high noise control requirements, low noise industrial air cooler should be selected. Under the same air volume and pressure, the noise of the centrifugal industrial air cooler with airfoil blade is less than that of the centrifugal industrial air cooler with forward blade.

(2) The working point of industrial cooling fan should be close to the maximum efficiency point. The higher the efficiency of the same type of industrial cooling fan, the smaller the noise. In order to keep the operating point of the industrial air cooler in the high efficiency area of the industrial air cooler, the valve should be avoided as far as possible. If the valve must be installed at the extrusion end of the industrial air cooler, the optimum position is 1 m away from the outlet of the industrial air cooler. It can reduce the noise below 2000 Hz. The air flow should be uniform at the entrance of industrial cooling fan.

(3) Reduce the speed of industrial air cooler properly under possible conditions. The Rotational Noise of industrial cooling fan is proportional to the 10 power of impeller circumferential velocity, and the eddy current noise is proportional to the 6 power (or 5 power) of impeller circumferential velocity. So reducing the speed can reduce the noise.

(4) The noise level of the inlet and outlet of industrial air-cooler is that of ventilation and air pressure increased. Therefore, when designing the ventilation system, the pressure loss of the system should be minimized. When the total volume and pressure loss of the ventilation system are large, it can be divided into small systems.

(5) The velocity of air flow in the pipeline should not be too high, so as not to cause regenerative noise. The determination of airflow velocity in pipeline should be selected according to different requirements and relevant regulations.

(6) Pay attention to the driving mode of industrial air cooler and motor. The noise of industrial air cooler with direct drive is the lowest, followed by coupling, and slightly worse with triangular belt without joint. Low noise motor should be used in industrial air cooler.