Tong Chi mini car cooling fan manufacturers tell you what is the source of the noise of the car cooling fan
Of course, Tong Chi mini car cooling fan manufacturers know that the most 'hate' users for car cooling fans is noise, because no one can stand the noise that hinders people's work or activities, and even affects people's mood. So today, the editor of Tongchi mini car cooling fan manufacturer tells you about the sources of noise caused by car cooling fans! Let us take a look!
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u003cbru003e Tongchi mini car cooling fan manufacturers tell you that the noise of car cooling fans is related to friction and air flow. The higher the speed of the car cooling fan and the greater the air volume, the greater the noise caused. In addition, the vibration of the car cooling fan itself is also a factor that cannot be ignored. Of course, the self-vibration of high-quality car cooling fans will be small, but the first two are difficult to overcome. To solve this problem, we can try to use a larger car cooling fan. In the case of the same air volume, the operating noise of the cooling fan of a large car at a lower speed should be smaller than that of the cooling fan of a car at a high speed.
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u003cbru003e 1. Vibration, Tongchi mini car cooling fan manufacturer tells you that if the rotor of the car cooling fan is rotating, the physical center of mass of the rotor and the center of inertia of the shaft are not on the same axis, then it will cause the rotor to fail. balance. The closest distance between the physical center of mass of the rotor and the center of inertia of the shaft is called the eccentricity, and the unbalance of the rotor will cause the eccentricity. When the rotor is rotating, a force acting on the shaft support will be generated due to the centrifugal force, which will cause vibration. , And vibration will be transmitted from the base path to all parts of the machine.
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u003cbru003e 2. Wind noise. When the cooling fan of a large automobile is working, the blade will periodically bear the pulse force of the uneven air flow at the outlet, which will generate noise; on the other hand, the blade itself and the pressure on the blade The distribution is uneven, it is easy to disturb the surrounding gas and parts when rotating, and also constitute rotating noise; in addition, the manufacturer of Tongchi mini car cooling fan tells you that when the gas flows through the blades, turbulent layers, vortices and The separation of the vortex causes the pulsation of the pressure distribution on the blade to cause vortex noise. The noise caused by these three reasons can be comprehensively referred to as 'cutting wind noise.' Generally, fans with large air volume and pressure will have relatively large cutting wind noise.
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u003cbru003e 3. Abnormal sound, Tongchi mini car cooling fan manufacturer tells you that wind noise sounds only pure wind, but abnormal sound is different. When a large automobile cooling fan is running, if there are other sounds besides the wind noise, It can be judged that the big fan has abnormal noise. Abnormal sound may be caused by foreign matter or deformation in the bearing, collision due to improper assembly, or uneven winding of the motor winding, causing looseness, which may cause abnormal sound. The service life of automobile cooling fans refers to the trouble-free working time of radiator products. The service life of high-quality automobile cooling fans can generally reach tens of thousands of hours.
