Common Faults Of Jaw Crusher

Jaw crushers may encounter various common faults during operation, which may be caused by multiple reasons. Here are some common faults and their possible causes and solutions:

1、 Mechanical malfunction

The host suddenly shuts down

Reason for malfunction: blockage of discharge port, loose triangular tape driving the pulley to rotate, loose eccentric shaft tightening bushing, damaged bearings, etc.

Solution: Remove the blockage at the discharge port, tighten or replace the triangular tape, reinstall or replace the tightening sleeve, replace the bearing, etc.

Crushing work stopped

Reason for malfunction: tension spring breakage, elbow plate detachment or breakage, etc.

Solution: Replace the spring with a new one, reinstall or replace the elbow plate, etc.

The output does not meet the factory standard

Reason for malfunction: Excessive hardness or toughness of the crushed material, incorrect motor wiring, improper discharge port size, jaw plate displacement, etc.

Solution: Replace the suitable crusher, change the motor wiring, adjust the size of the discharge port, check and adjust the position of the jaw plate, etc.

Jaw jumping or impact sound

Reason for malfunction: Loose or fallen jaw plate fastening bolts, too small discharge port, etc.

Solution: Tighten the bolts, adjust the discharge port, etc.

Eccentric axis bending or fracture

Reason for malfunction: improper lifting, excessive material hardness, long-term overload operation, etc.

Solution: Replace the eccentric shaft with a new one, select the crusher according to the compressive strength of the material, adjust the operating load, etc.

Fracture of movable jaw

Reason for malfunction: casting defects, direct impact of materials on moving jaws, etc.

Solution: Replace the movable jaw, increase the feeding hopper to ensure uniform feeding, etc.

The temperature rise inside the frame bearing seat or moving jaw is too high

Fault causes: bearing oil breakage or excessive oil, oil hole blockage, deviation of the counterweight block position of the flywheel, etc.

Solution: Refuel regularly and quantitatively, clean the oil hole, adjust the position of the counterweight of the flying groove wheel, etc.

Flying groove wheel axis swinging in the axial direction

Reason for malfunction: wear of the flying groove wheel hole, eccentric shaft or flat key, etc.

Solution: Replace worn parts, add protective covers, etc.

2、 Electrical malfunction

Although electrical faults are not directly related to mechanical faults, they may also affect the normal operation of the crusher in actual operation, such as motor wiring errors, unstable power supply, etc. This type of problem usually needs to be solved by checking the electrical system, adjusting the motor wiring, stabilizing the power supply, and other methods.

3、 Maintenance and upkeep

In order to prevent and reduce the occurrence of faults, daily maintenance and upkeep of jaw crushers are also very important. Here are some suggestions:

Regular inspection: Regularly check the lubrication of bearings, whether fasteners are tightened, and whether the transmission belt is in good condition.

Timely cleaning: Clean up the broken materials and other debris in the crushing chamber to avoid blockage.

Correct operation: Avoid side feeding and sudden load changes to reduce the impact on the crusher.

Shutdown processing: Before stopping the machine, the feeding should be stopped first, and the motor should be turned off after the material in the crushing chamber is completely discharged.

Replace worn parts: Regularly replace worn lining plates, jaw plates, and other components to ensure the normal operation of the crusher.

In summary, the common faults of jaw crushers involve multiple aspects such as mechanical and electrical issues, and need to be prevented and reduced through regular inspections, timely cleaning, correct operation, and shutdown treatment. At the same time, in the event of a malfunction, corresponding solutions should be taken according to the specific situation to restore the normal operation of the crusher.