Smoke exhaust axial fan is a unique type of exhaust fan. It has the characteristics of good heat resistance, high efficiency, small footprint, and convenient installation, so it has been liked by many manufacturing industries. But sometimes, after applying it for a period of time, we will find that there will be noise in the exhaust fan. Why? Below thisStainless steel fan manufacturersLet me introduce you.
1. When the blades of the exhaust fan are thin and excessively tilted forward, and the center of gravity is offset from the blade cross section, the centripetal force caused by the higher speed rotation and the change of the blade lift caused by the unstable intake rotation are very easy to arouse the blade vibration. In addition, due to fluid-solid coupling, it may also cause the galloping of the blades of the exhaust fan, which will destroy the blades early, reduce the efficiency of the centrifugal fan, and cause a lot of aerodynamic noise.
2. It is also related to the blade vibration frequency of the exhaust fan. The low-frequency vibration shape of the blade is mainly dominated by the overall blade torsion, while the high frequency is mainly dominated by the blade bending wave. From the point of view of the effect on noise, the first six modes have a greater impact, because its sloshing heat is very harmful to the flow field, which leads to the change of the pitch angle of the blade inlet, which in turn causes the fluctuation of the surface lift of the blade. Severe conditions can cause galloping, resulting in aerodynamic noise and reduced efficiency.
The above is the reason for the noise of the smoke exhaust axial fan introduced by the stainless steel fan manufacturer. In order to reduce the frequency of this kind of phenomenon, everyone should apply it properly when using it to ensure its service life.