How to adjust the roll gap of roll crusher is the key operation to control the granularity of the material and ensure the efficient operation of the equipment, according to the market common 3 different structure types of roller crusher, mainly through the following methods to achieve:
1、Wedge device adjustment
Change the position of the wedge by rotating the adjusting bolt:
Increase the gap: Pull up the wedge block, the movable roller is pushed away from the fixed wheel, and the granularity of the discharged material becomes larger.
Decrease the gap: the wedge block moves downward, the spring presses the movable roller, the gap is reduced, and the grain size of the discharged material is finer.
2、Adjustment of gasket
Increase or decrease the shims between the frame and the movable bearing:
Increase shims: the gap between two rollers increases, suitable for coarse grain size demand.
Decrease shims: the gap is reduced, the material is finer.
This method requires downtime operation, and the bolts need to be re-tightened and tested after adjustment.
3、Hydraulic adjustment method (applicable to fully hydraulic roller crusher)
fully hydraulic roller crusher
Adjust the distance between two rolls directly through the hydraulic system control panel, real-time display of values, higher precision.
Steps: Open the side cover after stopping the machine, adjust the hydraulic cylinder or replace the gasket, reset and try to run and fine-tune.
Test and optimisation after adjustment
1. No-load test run: make sure there is no abnormal vibration or noise.
2. Material test: put in a small amount of material to check the particle size, repeat the adjustment if necessary.
3. Parameter record: Record the number of gaskets, bolt position or hydraulic parameters after adjustment for subsequent maintenance.
Precautions
1. Safe operation: the machine must be shut down and disconnected before adjustment to avoid accidental starting of the equipment.
2. Matching of material characteristics: adjust according to the hardness of the material (e.g. pebbles need larger gap) and humidity to prevent clogging or excessive wear.
3. Regular maintenance: check the wear and tear of the roller surface, replace the liner in time; keep the bearing lubricated to prolong the life of the equipment.
4. Overload protection: The spring or hydraulic system needs to maintain proper pressure to ensure that non-crushed materials (e.g. metal) can automatically back off when they enter.
Adjustment suggestions for different scenarios
High hardness material: Increase the gap appropriately to reduce roll surface wear.
Fine grain size demand: adopt double adjustment of shim + wedge to ensure precision.
Frequent change of grain size: give priority to the hydraulic model to improve the adjustment efficiency.
Adjustment should be combined with the equipment model and operation manual, some traditional models rely on mechanical adjustment, while the new hydraulic models support dynamic adjustment. If the adjustment still fails to meet the demand, it may be necessary to check whether the roller surface is worn or the spring pressure is abnormal.
