How to reduce fan noise?

A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fan is China's customary abbreviation for gas compression and gas delivery machinery. The fan usually refers to ventilators, blowers, and wind turbines. Fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal and cooling, and in boilers and industrial furnaces for ventilation and draft, etc., where air flow is required.

In general, as the speed of the fan continues to increase, people will find that the noise caused by it continues to increase. This is the simplest explanation: if the fan output air volume is sufficient to meet the user's required working point, such as 1000Pa, the air volume is required to reach 5000m3/h, we should choose the motor with the smallest speed under the same working condition. That is to say, the speed is proportional to the noise.

Of course, we can also passively implement some fan noise reduction methods, such as adding a suction device to the shell, smoothing the inner wall of the inlet and outlet pipes to reduce wind resistance, which must be analyzed in specific circumstances.

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