Cone crushers are widely used in mining and aggregate production for secondary and tertiary crushing. However, during operation, they may develop abnormal noise and excessive vibration. How to solve these problems?
1. Unbreakable materials such as tramp iron (e.g., excavator teeth, broken bolts, or other metal debris) enter into the crushing chamber. When these hard objects get stuck between the mantle and the concave, they produce a sharp, metallic knocking sound and cause violent vibration.
Solution: Immediately stop the crusher, remove the blockage safely, and install a reliable metal detector and magnetic separator upstream to prevent future incidents.
2. Loose or worn components, including improperly fixed concave liners, a loose eccentric bushing, or worn transmission gears. Loose parts create rhythmic knocking or rattling sounds, while gear wear may produce a high- pitched squeal or irregular impact noise.
Solution: Regularly tighten all fastening bolts (such as the locking bolts on the concave and the mantle), check gear backlash, and replace any worn or broken gears or bushings without delay.
3. Improper feeding conditions also play a key role. If the feed is unevenly distributed (feeding only on one side of the crushing chamber) or contains excessive fines mixed with moisture, it can lead to uneven crushing forces, causing the adjustment ring to bounce, the main frame to vibrate strongly, and a low-frequency thumping noise.
Solution: Ensure that the feed material is evenly distributed across the entire chamber circumference, use a level indicator or a surge bin, and maintain a proper material-to-cavity fill ratio.
4. Oil system problems, such as too low oil temperature (which increases viscosity and reduces lubrication), or insufficient oil pressure/flow, can lead to bearing seizure or metal-to-metal contact inside the eccentric assembly. This often produces a heavy, irregular grinding noise and intense vibration.
Solution: Monitor oil temperature (keep it between 35–55?°C), maintain correct oil pressure, use the recommended grade of lubricant, and clean oil filters regularly.
In summary, abnormal noise and vibration in a cone crusher are urgent warnings. Common causes are tramp metal, loose parts, uneven feeding, and lubrication failures. Prompt inspection and corrective actions—such as clearing obstructions, tightening components, optimizing feed, and maintaining proper lubrication—will prevent major damage, extend equipment life, and ensure safe operation. If you have any questions, please contact Online Service or Whatsapp: +86 13938852499.