1. There is a lot of dust on the blade surface
When the blades of centrifugal fan are full of dust, it is easy to produce vibration. This vibration often shows sudden vibration rise, mainly because there is a certain angle between the gas entering the impeller and the rotating blades during operation. Anyone who has studied physics should know the principle of hydrodynamics, The non working surface of the gas blade will start to produce vortices, and the dust particles in the gas will accumulate on the non working surface. With the increase of dust, after reaching the peak, when the centrifugal fan is used to start operation, the dust particles will be unevenly dispersed, and the weight of the fan blade is also different, so the vibration frequency increases at this time.
2. It is not firm before fixing the connecting equipment
The fixing parts of centrifugal fan mainly include the following, base, foot bolt, volute and connecting pipe. During the independent inspection, it was found that the vertical vibration of the bearing increased, and the vibration value was abnormal. The centrifugal fan was randomly checked as a whole, but there was no problem with these devices. After more detailed investigation, it was found that the bearing seat foundation was a flat steel plate, which was fixed on the grouting foundation with anchor bolts. During the inspection, it was found that the foot bolts of the foundation were loose. After tightening, there was no problem.
3. Interaction between moving parts and fixed parts
We know that when the centrifugal fan body runs for a long time, the impeller and air outlet of the centrifugal fan are located on an axis, which is prone to deformation, resulting in collision between dynamic and static parts, as well as body vibration.
