Industrial chillers always wear out during use. Therefore, we need to record and analyze its operating parameters regularly, listen to the sounds emitted during operation, check the use of snow and frozen oil, and regularly maintain them. operating.
Noise is an annoying sound, continuous noise, and polluting the surrounding environment. The causes of noise generated by general industrial chiller fans can be described as follows:
When the blade rotates, it will rub against the air or cause an impact. The frequency of the noise is a combination of multiple frequencies, which are related to the speed of the fan. Recommendation: If the axial fan has the configuration of the moving wing and the stationary wing, the number of blades of the two is preferably not equal, so as to avoid greater noise resonance.
Noise is also generated when the blades generate eddy currents. During the operation of the fan, eddy currents are generated on the back side of the moving wing, which not only reduces the efficiency of the fan but also generates noise. In order to reduce this phenomenon, the installation angle of the blade should not be too large, and the blade blade should be curved smoothly, so do not suddenly change too much.
Noise occurs when it resonates with the duct casing. The inner joint of the air duct and the fan casing should be flat to avoid roughness and tearing. In addition, at the time of design, it is sometimes possible to cover the outside of the duct with a soundproof material to reduce noise.
In addition, in addition to the fixed noise of the fan itself, there are many sources of noise. Such as: bearings due to insufficient precision, improper assembly or poor maintenance can cause abnormal noise. Noise is also generated in the motor part, some are caused by poor design or poor quality control, but sometimes caused by cooling fans inside and outside the motor. Therefore, the selection of the equipment must be strictly carried out in the selection of the equipment, taking into account the humanized design of the equipment and other factors.
