a lotDC cooling fanCustomers will be concerned about the DC cooling fan in the use of the process, with the use of time growth, the fan will be more or less a little noise, this now belongs to the normal? In fact, it is normal, but many customers will mistakenly believe that these noises are abnormal sound, that the DC cooling fan seems to be a problem. In fact, noise is not equal to abnormal sound, which is a normal phenomenon.
Because the blades of the cooling fan are periodically subjected to the pulsation force of the uneven airflow at the outlet, for example, the uneven distribution of pressure on the blades themselves and the blades, the disturbance to the surrounding gas and parts during rotation also constitutes rotation noise. In addition, there is vortex noise caused by the fluctuation of pressure distribution on the blades due to the turbulence of the gas flowing through the blades, the vortex and the vortex detachment. In general, the noise of the cooling fan is closely related to the movement of its blades and belongs to physical noise.
For the same series of cooling fans, the greater the wind pressure, the greater the noise. Therefore, we have to choose a reasonable fan form according to the actual situation, because the surplus is too large not only waste electricity, but also increase noise,
For us, there are disadvantages. For the same type of cooling fan, should choose a low speed running fan: and for different types of fans, it is necessary to choose the lower noise, and not only consider the speed.
How does the noise of the cooling fan come about?
The noise of the cooling fan is different from the noise. The noise sounds only pure wind, and the noise, in addition to the wind, there are other sounds (with more than two sounds). The abnormal sound may be caused by foreign objects in the bearing or
Deformation, improper assembly and collision, or uneven winding of motor windings, resulting in loosening.
We generally use the method of close listening to the ear to detect abnormal sounds. The subjective factors are large, which is not easy to identify and is easy to dispute. If the number of fans used is large, it can be checked with the help of spectrum analysis equipment, and the distribution of noise spectrum energy can be identified.
Sounds.
At present, the industrial cooling fan to heat the equipment, dust removal, keep the air circulation in the workshop, etc., the application range of the cooling fan is very wide, so it is necessary to master how to distinguish the noise and abnormal noise in the cooling fan.
The above is the reason why the DC cooling fan has noise and abnormal noise during use. For more consultation, please consult our official website for details!