The impact crusher mainly relies on the high-speed rotating rotor to impact and crush. Due to the direct contact between the material and the rotor, the rotor may break after a period of use, and the crusher cannot produce normally. What is the reason for the rotor fracture of the impact crusher?
1. Process issue: The casting process of the rotor has a significant impact on the service life of the rotor. If the rotor body is not subjected to heat treatment, it will lead to stress problems in the rotor, which can easily lead to cracks or fractures.
2. There is some ferrite in the organization: if there is a large amount of block like free ferrite and coarse tissue ferrite in the organization, these structures will reduce the overall strength and performance of the rotor body.
3. Casting defect: there are a large number of Casting defect in the original structure, such as pores, shrinkage porosity, inclusions, etc., which are Casting defect on the fracture surface that seriously exceed the size limit. These Casting defect are also one of the main reasons for rotor body failure and fracture.
4. Failure to timely repair the equipment: There are old cracks installed at the plate hammer, which are large in size. These old cracks are caused by encountering high-strength ore or other non-ore materials during equipment operation, and are the main cause of overall damage to the rotor.
To prevent the breakage of the crusher rotor, it is necessary to carry out daily maintenance on the crusher rotor, and the correct use method is also a factor in the normal operation of the crusher rotor.
Normal operation method for crusher rotor:
When the rotor is running at high speed, due to the deviation of the rotor casting and the deviation of the total mass of the plate hammer, unbalanced centrifugal force will be generated during the rotation of the rotor, causing the shaking of the impact crusher and causing damage to the rotor bearings. Therefore, after the installation of the rotor structure, a static balance test needs to be carried out, and reasonable adjustments should be made based on the diameter of the rotor body to achieve accurate balancing and maintain the rotor's running balance. Therefore, the correct installation method can extend the service life of the rotor.