Causes of side channel thrower Noise

 Blower Technology     |      2019-09-26 15:09
Noise is a kind of noise that makes people feel noisy and bored, and its degree sometimes varies with people's mood. But continuous noise also pollutes the whole week. But continuous noise also pollutes the whole week. The causes of noise generated by general fans can be classified as follows: the causes of noise generated by general fans can be classified as follows:
1. Noise due to blade rotation
When the blade of high pressure blower rotates, it will produce friction or impact with air. When the blade rotates, it rubs against the air or impacts it. The faster the speed is, the higher the frequency of air connection is, and the sharper the noise is. The faster the speed is, the higher the frequency of air connection is, and the sharper the noise is. This phenomenon is more evident when the width or thickness of the blade increases. This phenomenon is more evident when the width or thickness of the blade increases. Noise frequencies are composed of multiple frequencies, which are related to the speed of the fan. Noise frequencies are composed of multiple frequencies, which are related to the speed of the blower.
When the side channel thrower has the configuration of moving wing and stationary wing, the number of blades of the two should be different, so as to avoid more noise resonance. When the axial flow fan is equipped with movable wing and static wing, the number of blades should be different between them, so as to avoid more noise resonance. But no matter it is an axial or centrifugal fan, the noise produced by the fan is also great when the wind speed is fast and the wind pressure is high. But no matter it is an axial or centrifugal fan, the noise produced by the fan is also great when the wind speed is fast and the wind pressure is high.
2. Noise also occurs when the blade produces eddy current.
During the operation of the fan, eddy current will be generated on the back of the moving wing, which will not only reduce the efficiency of the fan, but also produce noise. During the operation of the fan, eddy current will be generated on the back of the moving wing, which will not only reduce the efficiency of the fan, but also produce 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 suddenly change too much. 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 suddenly change too much.
3. Noise due to turbulence
When air is flowing, turbulence easily occurs when it meets sharp obstacles. Although this turbulence is different from the eddy current, it will also produce noise or high frequency whistle, which will also cause efficiency loss for the fan. Although this turbulence is different from the eddy current, it will also produce noise or high frequency whistle, which will also cause efficiency loss for the fan.
4. Noise due to resonance with duct housing
The inner seam of air duct and blower shell should be smooth to avoid rough and uneven, resulting in tearing sound. The inner seam of air duct and fan shell should be smooth to avoid rough and uneven, causing tearing sound. Because of the resonance of the connecting pipes, the small sound becomes louder and the noise is greater. Because of the resonance of the connecting pipes, the small sound becomes louder and the noise is greater. In design, sometimes the noise can be reduced by covering the air duct with sound-proof material. In design, sometimes the noise can be reduced by covering the air duct with sound-proof material.
5. Noise outside blower
In addition to the fixed noise of the fan itself, there are many noise sources, such as: bearing due to inadequate precision, improper assembly or poor maintenance will cause abnormal noise. In addition to the fixed noise of the side channel thrower itself, there are many noise sources, such as: bearing due to inadequate precision, improper assembly or poor maintenance will cause abnormal noise. The motor part also produces noise, some of which are caused by poor design or poor quality control, but sometimes by internal and external cooling fans of the motor. The motor part also produces noise, some of which are caused by poor design or poor quality control, but sometimes by internal and external cooling fans of the motor. Gears and belts also cause noise due to friction. Gears and belts also cause noise due to friction. Noise generated by resonance of other structures can not be neglected, sometimes due to imbalance of the body. Noise generated by resonance of other structures can not be neglected, sometimes due to imbalance of the body.