The industrial fan is a common industrial machine that is widely used in tall spaces such as industrial plants, logistics warehousing, waiting rooms, exhibition halls, gymnasiums, supermarkets, etc., as a means of space ventilation and personnel cooling. Large industrial fans can push a large amount of airflow to the ground, forming a horizontal movement of the airflow layer at a certain height on the ground, thereby promoting overall air circulation. The benefits of this are all-round ground coverage and three-dimensional circulation of air. However, large industrial fans in factories are bound to produce noise during operation. Today, the industrial fan manufacturer will summarize for you some reasons for the noise of large industrial fans.

1. Abnormal sound

Wind noise sounds like pure wind sound, but abnormal noise is different. When a large industrial fan is running, if there are other sounds besides wind sound, it can be judged that the industrial fan has abnormal noise. Abnormal noise may be caused by foreign matter or deformation in the bearing, collision due to improper assembly, or uneven winding of the motor winding, resulting in looseness, which may cause abnormal noise.

2. Wind noise

When an industrial large fan is working, noise is generated because the blades periodically bear the pulsating force of the uneven airflow at the outlet; on the other hand, due to the uneven distribution of pressure on the blades themselves and on the blades, the surrounding gas and parts are disturbed during rotation. Constitutes rotational noise; in addition, when the gas flows through the blades, the turbulent attachment surface, vortex and vortex detachment are generated, which causes the pulsation of the blade pressure distribution and generates eddy current noise. The noise caused by these three reasons can be comprehensively called "wind noise". Generally, large industrial fans with large air volume and pressure will also have larger wind noise.

3. Vibration

Assuming that when the industrial large fan rotor rotates, the physical center of mass of the rotor and the center of inertia of the rotating shaft are not on the same axis, it will cause imbalance in the rotor. The closest distance between the physical center of mass of the rotor and the center of inertia of the rotating shaft is called the eccentricity. The unbalanced rotor causes the eccentricity. When the rotor rotates, the centrifugal force generates a force on the rotating shaft bracket to form vibration, and the vibration is transmitted to the machine through the base path. Each part.

The above three points are what industrial fan manufacturers introduce to you about the noise problems of industrial large fans.