The reasons for the bending of the eccentric shaft of the jaw crusher during the operation of the ore processing production line are as follows:

Learn more about jaw crusher

1. Improper lifting of the main engine, causing the main engine to overturn

When the main body of the jaw crusher is hoisted, it is easy to tip over, resulting in uneven force on one side of the eccentric shaft, which in turn causes accidents such as unilateral bending or even breakage. Therefore, the operator must lift the main machine correctly to ensure that the eccentric shaft is evenly stressed, prevent it from bending due to uneven stress, and ensure the safety of the lifting process.

2. Reasons for feeding

When the material fed into the jaw crusher is too large, too hard, or contains impurities such as iron blocks, and does not meet the equipment feeding standards, the load impact force of the eccentric shaft will be significantly increased, causing the eccentric shaft to bend. Therefore, the nature of the input material must be strictly controlled during production to ensure that the material meets the requirements of the crusher and non-crushed materials are strictly prohibited from entering.

3. The toggle plate or pad does not meet the standards, and it acts as a self-breaking protection when non-crushed objects enter the crushing chamber. When this situation occurs, multiple aspects should be evaluated and it is strictly prohibited to use toggle plates and toggle plate pads that do not meet the design standards.

4. Improper heat treatment of the eccentric shaft. When the heat of the eccentric shaft is not dissipated in time, stress concentration may easily cause fracture in a short period of time. At this time, the appropriate method is to replace the eccentric shaft with a new one and use an eccentric shaft that has passed the heat treatment.

5. The main engine has been overloaded for a long time, and the equipment has aged and caused bending. Replace the eccentric shaft with a new one, adjust the operating load or replace the crusher with a suitable one.

The eccentric shaft is equipped with a pulley and a flywheel at both ends. It needs to withstand huge bending and torsion during work. Therefore, the manufacturing material of the eccentric shaft needs to have high strength, toughness and wear resistance. Otherwise, the eccentric shaft will be subjected to long-term Large bending and torsion causes wear.

When selecting the material for the eccentric shaft of Shibang Industrial Crusher, carbon steel and alloy steel are used. Carbon steel is cheaper than alloy steel and less sensitive to stress concentration. The commonly used carbon steel is 45 steel. Alloy steel has high mechanical strength and good hardenability. It can be used when transmitting high power and requiring reduced mass and improved shaft wear resistance.