Centrifugal fans are widely used in the kiln industry. For example, common tunnel kilns, rotary kilns, and lime kilns use centrifugal fans to achieve functions such as roasting, drying, and moisture removal. Some equipment operation and management personnel reported that the centrifugal fan of the kiln sometimes had abnormal vibration during the use process, and they did not know how to solve it. Next, Xiaobian will introduce the common causes of kiln fan vibration and the corresponding treatment methods for you.
The reasons for the vibration of the kiln fan and the corresponding treatment methods
1. The anti-vibration rubber fixing bolts are not adjusted properly
Glue uses bolts to connect the air base to the fan platform. If the bolts are too loose, the fan will vibrate and squeeze the anti-vibration glue. At the same time, the anti-vibration glue has a recoil force on it, which is easy to generate and resonate, thereby causing the vibration of the kiln fan; The anti-vibration glue screw is too tight, resulting in poor vibration damping effect, and the vibration is transmitted to the fan platform, which causes the platform to vibrate.
Treatment method: In this case, the vibration is generally slight, and it will not damage the equipment or cause the performance of the equipment to be reduced; the problem can be solved by adjusting the tightness of the anti-vibration rubber bolts under the base of the kiln fan to make them tight.
2. Bearing wear or clearance becomes larger
In the long-term operation of centrifugal fan equipment, if the bearing wears, the gap between the inner and outer rings and the balls or rollers is large, the main shaft will jump and cause vibration; the bearing wreath, balls, and rollers will also vibrate; at this time, the general kiln The furnace fan will be accompanied by a relatively strong abnormal noise.
Treatment method: In this case, it is necessary to stop the machine immediately for investigation. If it is indeed a bearing problem, the bearing should be replaced immediately to avoid equipment damage.
3. The plum blossom rubber pad is damaged
The damage of the plum blossom rubber pad will also cause the vibration of the fan, because the damage of the plum blossom rubber pad will cause the coupling iron to touch the iron, resulting in vibration and obvious abnormal noise of the equipment.
Treatment method: stop the machine in time and replace the plum blossom rubber pad.
4. Uneven distribution of soot and dust
The uneven distribution of soot and dust on the fan blades of the centrifugal fan of the kiln can easily lead to deviation of the mass distribution of the fan blades, thus causing the occurrence of vibration. Treatment method: Regularly check and maintain the fan equipment, and clean up the smoke and dust of the fan blades in time.
5. Deformation of main shaft or fan blade
The deformation of the main shaft or the fan blade will cause the vibration of the centrifugal fan equipment, and this vibration has the nature of a vicious circle, which needs to be checked and dealt with in time.
Treatment method: stop the machine in time and check, if the main shaft is deformed and needs to be replaced; if the fan blade is deformed or has poor mass distribution, it can be detected and corrected by static balance test.