Judgment of the replacement time of roller skin of roller crusher

Judgment of the wear degree of roller skin

1. Visual inspection: Regularly visually inspect the roller skin to observe whether there are obvious wear marks on its surface, such as grooves, cracks or wear below the limit line. If the roller skin surface is severely worn, it will not provide sufficient crushing force and needs to be replaced.
2. Measure the thickness: Use a caliper or special measuring tool to measure the thickness of the roller skin regularly. When the roller skin is worn to a certain proportion of the original thickness (usually 70%), it should be considered for replacement.
3. Check the roller skin gap: The change in the roller skin gap is also an important basis for judging whether it needs to be replaced. As the roller skin wears, the gap between the rollers will increase. If the gap exceeds the maximum allowable value, the roller skin should be replaced immediately.
   Evaluation of production efficiency
4. Decreased output: If the output of the crusher drops significantly under the same operating conditions, this may be a signal that the crushing efficiency is reduced due to roller wear.
5. Changes in crushing particle size: If the particle size of the crushed material does not meet the requirements and cannot be improved after adjusting the roller gap, this indicates that the roller may have been worn to the point where it needs to be replaced.
   Monitoring of equipment operation status
6. Vibration and noise: When the roller is unevenly worn or cracked, the crusher may produce abnormal vibration and noise during operation. These phenomena indicate that the roller may need to be replaced.
7. Current changes: By monitoring the working current of the crusher, the wear of the roller can be indirectly judged. If the current fluctuates abnormally or continues to rise, it may be because the wear of the roller causes the crusher load to increase.
   Safety considerations
8. Risk of roller shedding: When the roller is severely worn or not firmly fixed, there is a risk of shedding, which will pose a threat to the safety of operators and equipment. Once the roller is found to be unstable, it should be replaced immediately.
9. Regular replacement plan: Even if the roller skin is not obviously worn, a regular replacement plan should be formulated according to the equipment usage and the manufacturer’s recommendations to ensure the stable operation of the equipment and production safety.

Conclusion
The timing of roller skin replacement of the roller crusher needs to comprehensively consider factors such as the degree of roller skin wear, production efficiency, equipment operation status and safety. Through regular inspection and monitoring, the wear of the roller skin can be discovered in time and replacement decisions can be made, thereby ensuring the efficient and stable operation of the crusher, reducing production costs and ensuring operational safety.