CS240D

CS240D Cone Crusher: Fault Diagnosis

Material Blockage

Fault Phenomenon

When there is too much material accumulation or blockage in the crushing chamber, it will cause the crusher to operate poorly and generate vibration.

Possible Causes and Diagnosis Methods

Observe whether there is material blockage at the feed port and discharge port, or judge by checking the current change of the crusher. If the current increases abnormally, it may be because the material blockage causes the crusher load to increase.

Excessive Oil Temperature

Fault Phenomenon

The oil temperature of the lubrication system exceeds the normal working temperature range and may trigger the oil temperature alarm device.

Possible Causes and Diagnosis Methods

Insufficient or Deteriorated Lubricating Oil

Check the oil level of the lubricating oil tank. If the oil level is too low, it may be the cause of the excessive oil temperature. At the same time, check the quality of the lubricating oil, such as whether the color has turned black and whether there is an odor. If the lubricating oil deteriorates, its heat dissipation and lubrication performance will decline, resulting in an increase in oil temperature.

Cooling System Failure

Check whether the cooling water pipeline is unobstructed and whether the cooling water pump is working normally. The effectiveness of the cooling system can be judged by observing the temperature difference between the inlet and outlet of the cooling water pipeline. If the temperature difference is too small, it may be due to a blockage in the cooling water pipeline or a failure of the cooling water pump.

Severe Wear of Bearings or Gears

The worn bearings or gears will generate excessive frictional heat during operation and transfer it to the lubricating oil, resulting in an increase in oil temperature. Check the wear conditions of the bearings and gears, such as whether there is overheating discoloration, wear particles and other signs.

Sudden Shutdown of the Crusher

Fault Phenomenon

The crusher suddenly stops working during normal operation and the motor stops rotating.

Possible Causes and Diagnosis Methods

Electrical Fault

Check the electrical system, including the motor, control cabinet, fuses, etc. Check whether the motor has an overload protection action, and check whether the electrical components in the control cabinet are damaged, such as whether the contactor is normally closed and whether the relay has actuated. A multimeter and other tools can be used to measure the voltage, current and other parameters of the circuit to determine whether the electrical system is normal.

Operation of Overload Protection Device

If uncrushable foreign objects enter the crushing chamber or the feed amount suddenly increases, the overload protection device (such as a spring safety device or a hydraulic protection system) may operate and cause the crusher to shut down. Check whether there are foreign objects in the crushing chamber and check the state of the overload protection device, such as whether the spring is deformed and whether the pressure of the hydraulic system is abnormal.

Mechanical Fault

Check the key mechanical components of the crusher, such as whether the main shaft is broken and whether the transmission components are damaged. Make a preliminary judgment of whether the mechanical components are normal by visual inspection and manually rotating the main shaft. If the main shaft cannot be rotated, it may be due to the mechanical components being stuck and causing the shutdown.