1. We need to reasonably choose the type of tunnel fan. If we are required by high noise, then we need to choose a low noise fan. Under the same air volume and wind pressure, the centrifugal fan of the wing blades is less noise, and the front sheet is small. The blade of the blade is noisy.

2. The working point of the tunnel fan should be close to the high efficiency point. The higher the efficiency of the same type of fan, the smaller the noise. In order to keep the working point of the fan at the high efficiency zone of the fan, it is necessary to avoid using valves to adjust the working conditions. If the valve must be set at the end of the fan, the good position is 1 meter from the exit of the fan. This can reduce the noise to less than 2000 Hz, and the airflow at the entrance of the fan should be kept uniform.

3. The airflow in the pipe should not be too high to avoid noise. The airflow speed in the pipeline should be selected according to different requirements and relevant regulations. And we should pay attention to the method of transmission of tunnel fans and motors. The direct transmission noise of the fan is less, followed by a couplet, and the seamless V belt transmission is slightly worse. The fan should be equipped with a low noise motor.

The above three points are the three important ways to reduce the noise of fan noise through sound source. If you have other questions or any other questions about the fan, we welcome your consultation and look forward to cooperating with you.