Cooling fanDuring use, there must be sound, but different fans produce different noises. There are large and small. How are these sounds produced and how to deal with them?
1. Due to the vortex generated by the blade will also produce noise
During the operation of the fan, the back of the moving wing will produce eddy currents, which will not only reduce the efficiency of the fan, but also generate noise. During the operation of the fan, the back of the moving wing will produce eddy currents, which will not only reduce the efficiency of the fan, but also generate noise. In order to reduce this phenomenon, the installation angle of the blade should not be too large, and the bending of the fan blade should be smooth, and the sudden change should not be too large. In order to reduce this phenomenon, the installation angle of the blade should not be too large, and the bending of the fan blade should be smooth, and the sudden change should not be too large.
2. Noise due to blade rotation
When the blade rotates, it will cause friction with the air, or impact. When the blade rotates, it will cause friction with the air, or impact. The faster the speed, the higher the frequency of the air and the sharper the noise. The faster the speed, the higher the frequency of the air and the sharper the noise. This phenomenon is more pronounced as the width or thickness of the blade increases. This phenomenon is more pronounced as the width or thickness of the blade increases. The frequency of the noise is compounded by a variety of frequencies, which are related to the speed of the fan. The frequency of the noise is compounded by a variety of frequencies, which are related to the speed of the fan.
3. Noise caused by fans other
In addition to the fixed noise of the fan itself, there are many noise sources, such as: bearings due to lack of precision, improper assembly or poor maintenance will cause abnormal noise. In addition to the fixed noise of the fan itself, there are many noise sources, such as: bearings due to lack of precision, improper assembly or poor maintenance will cause abnormal noise. The motor part also produces noise, some of which is caused by poor design or poor manufacturing quality control, but sometimes it is caused by the internal and external cooling fans of the motor. The motor part also produces noise, some of which is caused by poor design or poor manufacturing quality control, but sometimes it is caused by the internal and external cooling fans of the motor. Gears and belts also generate noise due to friction. Gears and belts also generate noise due to friction. The noise generated by the resonance of other structures can not be ignored, which is sometimes caused by the imbalance of the body. Resonance of other structures
4. Resonance with the air duct shell and noise
The inner seam of the air duct and the fan housing should be smooth to avoid rough and uneven, resulting in tearing sound. The inner seam of the air duct and the fan housing should be smooth to avoid rough and uneven, resulting in tearing sound. However, due to the resonance of the successive pipelines, the subtle sound becomes louder and causes greater noise. However, due to the resonance of the successive pipelines, the subtle sound becomes louder and causes greater noise. When designing, it is sometimes possible to cover the air duct with sound-proof materials to reduce noise. When designing, it is sometimes possible to cover the air duct with sound-proof materials to reduce noise.
The above is the cause of the noise generated by the cooling fan and the small knowledge sharing of the treatment measures. Shenzhen Jiangshanlai Electronic Technology Co., Ltd. is a large-scale enterprise specializing in the customization, research and development, manufacturing, sales and service of DC brushless motors, DC cooling fans, DC brushless fans, DC bracket fans, pressurized cooling fans, micro cooling fans, DC blowers, and non-standard fans, DC fan wholesale manufacturers and DC fan suppliers. Products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places.
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