When the blade generates a vortex, in
Cooling fanNoise will also be generated during operation, and eddy currents will be generated at the rear of the moving wing, which will not only reduce the efficiency of the fan, but also generate noise. During the operation of the fan, a vortex will be generated at the rear of the moving wing, 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 blade should be smooth and should not change too much suddenly. In order to reduce this phenomenon, the installation angle of the blade should not be too large, and the bending of the blade should be smooth and should not change too much suddenly.
2 Blade rotation noise
When the blade rotates, it will cause friction or impact with the air. When the blade rotates, it will produce friction or impact with the air. The faster the speed, the higher the frequency of the connecting air and the greater the noise. The faster the speed, the higher the frequency of the connected air and the greater the noise. This phenomenon is more pronounced when the width or thickness of the blade is increased. This phenomenon is more pronounced when the width or thickness of the blade is increased. The frequency of the noise is synthesized by multiple frequencies, all of which are related to the speed of the fan. The frequency of the noise is synthesized by multiple frequencies, all of which are related to
Cooling fanrelated to speed.
3 Fans
The noise generated is not only the fixed noise of the fan itself, but also many noise sources, such as abnormal noise caused by insufficient accuracy, improper assembly or poor bearing maintenance. In addition to the fixed noise of the fan itself, there are many noise sources, such as abnormal noise caused by insufficient accuracy, improper assembly or poor bearing maintenance. The motor also produces noise. Some noise is caused by poor design or poor manufacturing quality control, but sometimes it is also caused by the internal and external cooling fans of the motor. The motor also produces noise. Some noise is caused by poor design or poor manufacturing quality control, but sometimes it is also caused by the internal and external cooling fans of the motor. Gears and belts also produce noise due to friction. Gears and belts also produce noise due to friction. The noise generated by the resonance of other structures cannot be ignored, which is sometimes caused by body imbalance. Resonance of other structures
4 Noise generated by the resonance of the joint between the pipe and the inner surface of the fan housing
It should be flat to avoid rough and tearing sounds. The connection between the inner surface of the pipe and the fan shell should be smooth to avoid roughness and tearing. However, due to the resonance of the connecting pipe, the subtle sound becomes louder, resulting in greater noise. However, due to the resonance of the connecting pipe, the subtle sound becomes louder, resulting in greater noise. In the design, sometimes the outside of the duct can be covered with sound insulation material to reduce noise. In the design, sometimes the outside of the duct can be covered with sound insulation material to reduce noise.
The above cooling fan explains the cause and solution of the noise. Shenzhen Jiangshanlai Electronic Technology Co., Ltd. is a company specializing in DC brushless motors, DC brushless fans, DC bracket fans, boosting cooling fans, micro cooling fans, DC cooling fans, DC blowers, non-standard fan customization, R & D, manufacturing, Sales and service of large enterprises. It is a wholesale manufacturer of DC fans and a supplier of DC fans. The products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places
