Date: Aug. 11, 2021
A vibrating screen is a very important auxiliary equipment in mine production. Once a failure occurs, it will directly affect the normal operation of the production line. As a common type of vibrating screen, what are the common problems of circular vibrating screens in daily operation? When encountering these problems, how should we solve them? This article analyzes the causes of three common circular vibrating screen problems and proposes countermeasures.
The circular vibrating screen is mainly driven by a motor to drive a vibrator with an eccentric mass to generate vibration. In the vibration process, the shaft is the key component that drives the circular vibrating screen to vibrate, and at the same time, it is subjected to a greater force. Therefore, in actual use, shaft fracture is a relatively common failure. Once the shaft fracture problem occurs, the circular vibrating screen will immediately stop working, and its maintenance is more complicated, so great attention must be paid.
The shaft of the circular vibrating screen is a metal material, which will be subjected to a combined moment of torque and repeated impact for a long time during use. Under the action of long-term impact torque, the internal material of the shaft will gradually fatigue, and when the fatigue limit is reached, the fracture will occur. In addition, there are big differences in the torsional strength of different materials. If the material is poor, it will inevitably lead to low bending strength and fatigue resistance, and it is prone to damage.
It is recommended that when purchasing a circular vibrating screen, you must choose a regular manufacturer to ensure that the selection of materials for each component is reasonable. At the same time, it is strictly forbidden to start the circular vibrating screen with materials to ensure that the circular vibrating screen is only started without materials. Strengthen daily maintenance and inspection, and check the shaft regularly. Once it is found to be bent or deformed, it must be replaced in time to avoid damage during the transmission process.
If the tension of the V-belt of the circular vibrating screen is too large, it will cause the shaft to increase the bending moment and the resultant moment. The stress during the belt work process will increase significantly, even exceeding the allowable stress of the shaft, which will directly cause the shaft to be damaged. Phenomenon. Therefore, it is necessary to adjust the tension of the V-belt in time. It is recommended to reduce the tension of the V-belt as much as possible under the premise of ensuring normal transmission. Of course, changing to a flexible connection can avoid this phenomenon.
The vibrating screen is mainly composed of a vibrator, screen box, support or suspension device, transmission device, and other components. Once a transmission failure occurs, the circular vibrating screen will be unusable, which will seriously affect normal production. At the same time, the transmission failure of the vibrating screen is more complicated to repair.
Common drive failures of the circular vibrating screen include wear of the coupling, fracture of the connecting bolt, cracking of the protective cylinder, damage to the bearing of the belt pulley, and belt tear.
For this reason, the operators of the circular vibrating screen need to conduct preventive inspections on the transmission part regularly. In the inspection process, special attention should be paid to the longitudinal and lateral clearance of the bearing to ensure that the clearance meets the requirements. It is also necessary to add lubricating oil in time to avoid serious wear. Check the bearing support every week and add lubricating oil in time. Observe the operation of the circular vibrating screen. If there is an abnormal situation, the operation must be stopped and the system checked to avoid larger accidents.
Excessive bearing temperature is also a common fault in the use of circular vibrating screens. Although the bearing temperature is too high, it will not immediately have a direct impact on production, but if the temperature continues to be too high for a long time, it will inevitably have a greater impact on the service life of the bearing. Therefore, technicians must also attach great importance to this issue.
Long-term work will inevitably generate a certain amount of heat, which will promote the volatilization of the lubricating oil, and the volatilization of the lubricating oil will further increase the friction and increase the temperature. Therefore, it is necessary to reasonably arrange the running time of the circular vibrating screen to improve the operating efficiency of the equipment, avoid long-term continuous work, and it can be shut down in time when the circular vibrating screen is not needed.
Insufficient lubricating oil will inevitably cause the temperature to rise continuously. It is necessary to check the bearings regularly and add lubricating oil to avoid excessive temperature caused by insufficient lubricating oil.
The above are the reasons and countermeasures for the three common failures in the use of circular vibrating screens. If you encounter other difficult-to-solve problems during use, you can contact LZZG at any time. We have professional technicians to answer you.
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