Common vibrating screen failures and treatment methods
Vibrating screens are mainly used for screening sand and gravel in quarries, and can also be used for product classification in coal preparation, mineral processing, building materials, electric power and chemical industries. More and more users pay attention to the failures and treatment methods of vibrating screens. The common vibrating screen failures of Henan DEWO stone crusher machine manufacturer are analyzed as follows:
1. The vibrating screen cannot be started or the amplitude is too small. Check the electrical barriers, whether the motor is damaged, or the components in the line are damaged, whether the voltage is insufficient, there is no problem in these three aspects, and then check mechanically, the vibrating screen Whether the material on the screen surface is accumulated too much, if it is, remove it immediately. Whether the coupling bolts on the vibration exciter have fallen off, whether the grease has thickened and agglomerated, the vibration exciter can be cleaned and repaired at this time, and then the position of the eccentric shaft weighting block or the auxiliary eccentric block can be adjusted appropriately.
2. Abnormal flow of materials on the screen surface of the vibrating screen. First, the rigidity of the screen box is insufficient, there is a critical frequency, and the connecting bolts have been vibrated loose, even to the extent of full vibration, namely tighten. Second, the horizontal level of the screen box is not accurate. Find the fault from the support seat of the supporting foot spring or the spring itself, change the spring or change the size of the support, and it may be caused by the damage of the screen surface. Just replace the screen. If the rigidity of the screen box has been insufficient and the horizontal level is not accurately determined, the beam will break, and the material will flow abnormally if it is still running. It may also be improper operation, that is, feed imbalance is also one of the reasons.
3. Poor screening quality of the vibrating screen is responsible for improper operation. It may block the mesh, increase the fine particles in the sieve material and increase the moisture, so that the material layer on the screen is too thick, and the feeding is uneven. It is possible that the two sides of the screen are not pulled tightly. If the shaft is eccentrically vibrating, it may be that the belt is weak in driving, the belt is too loose, and the mechanical problem is solved, and then reverse rotation for a period of time to improve the screening quality.
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