In the daily use of the jaw crusher , wear is inevitable. How to reduce the wear, not only can improve production efficiency, but also improve economic efficiency, so we have long-term in the jaw crusher, eccentric shaft and bearing bush of the jaw crusher. Maintenance.
The working mode of the jaw crusher is a curved extrusion type. The working principle is: the motor drives the belt and the pulley, and the moving shaft moves up and down through the eccentric shaft. When the moving jaw rises, the angle between the bracket and the moving jaw becomes larger, thereby Pushing the moving jaw to approach the fixed jaw, at the same time the material is crushed or crushed to achieve the purpose of crushing; when the moving down, the angle between the bracket and the moving jaw becomes smaller, the moving jaw is in the tie rod, and the spring acts Next, leave the fixed jaw, and the broken material is discharged from the lower opening of the crushing chamber. As the motor rotates continuously, the crushing maneuvering cycle motion crushes and excretes the material to achieve mass production.
First, if the shaft wears little, just to repair its geometry, it can be turned on a lathe to bring the journal to the correct geometry and then reduce the bearing inner diameter accordingly. However, after several such treatments, if the journal size is reduced by 5% compared to the original, no turning is allowed, and the new shaft should be replaced.
Again, jaw crusher is working under the impact load, Pap bearing alloy lining on the working period of about two years or so, the deadline, you will need to re-cast. If the eccentric shaft and the bearing bush, the mandrel and the bearing bush are worn, and the top clearance is greater than 1.5 times of the original assembly clearance, it needs to be adjusted or replaced; if the oil groove wears 1.5 mm, the oil groove should be re-opened and adjusted. The gap between the upper cover of the connecting rod head and the eccentric shaft, when worn to more than 1.5 times the assembly clearance, also needs to be adjusted or replaced with a new one. When the Babbitt alloy on the bearing shell has a deep peeling or a large abrasion, it should be recast. For the quality of the bearing bush, the following requirements are required: the surface of the babbitt alloy should be uniform, dull, silvery white; the surface layer of the babbitt should not have ash, cracks, blisters, shrinkage holes, etc.
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