Crushing is a step in the whole beneficiation process. Jaw crushers are widely used in coarse crushing and medium crushing. However, most concentrators will encounter the bending of the eccentric shaft of the crusher, we can solve this problem only by clearly knowing what causes the bending of the eccentric shaft.
The main reasons for the bending of the eccentric shaft of the jaw crusher are as follows: if the hardness of the crushed object exceeds that specified in the product operation manual, the bending will also be caused by excessive work; Long term overload operation of main engine; Bending due to equipment aging; The elbow plate or the base plate of the desulfurized gypsum ball pressing machine does not meet the standard, and the non broken objects play the role of self breaking protection when they enter the crushing chamber; Improper heat treatment of eccentric shaft leads to stress concentration, resulting in short-term fracture.
The elbow plate or base plate does not conform to the standard, and the non broken objects play the role of self breaking protection when they enter the crushing chamber, in case of such a situation, it shall be assessed in many aspects, and it is strictly prohibited to use elbow plates and elbow pads that do not meet the design standards. Improper heat treatment of eccentric shaft,when the thermal power of the eccentric shaft is not dispersed in time, the stress is concentrated, which is easy to cause short-term fracture,at this time, the appropriate method is to replace the new eccentric shaft and use the eccentric shaft that has passed the heat treatment. The main engine runs over the negative load for a long time, and the equipment is aged and bent, replace the new eccentric shaft, adjust the operation load or replace the corresponding four roll crusher. Improper lifting of the main machine, the main machine overturns, it is easy to overturn during the lifting of the main machine of the jaw crusher, resulting in uneven stress on one side of the eccentric shaft, resulting in unilateral bending of the eccentric shaft, and even accidents such as fracture of the eccentric shaft, therefore, during hoisting, the operator of jaw crusher shall hoist the main machine correctly to prevent the eccentric shaft from bending due to uneven stress on one side.
If the materials to be crushed put into the jaw crusher have large particle size and high hardness, which do not meet the feeding standard of the jaw crusher, or there are impurities such as iron blocks in the production, the load impact force of the materials on the eccentric shaft of the jaw crusher will be increased, resulting in the bending of the eccentric shaft. Therefore, during production, attention should be paid to controlling the feeding properties, defining the feeding properties specified by the jaw crusher, and forbidding unqualified materials and other non broken objects from entering the equipment.
The measures to make up for bending of eccentric shaft of jaw crusher are as follows: replace the eccentric shaft of briquette briquetting machine and lift the main machine correctly; Adjust the operating load or replace the appropriate ball press or crusher according to the compressive strength of the crushed materials; Do not use elbow plates and elbow pads that do not meet the design standards; Replace the eccentric shaft of the high-pressure ball press, adjust the operating load or replace the appropriate ball press or crusher; Replace the eccentric shaft of the slime pellet press with a new one, and do not use the elbow plate and elbow plate pad that do not meet the design standards; Use the eccentric shaft qualified by heat treatment to solve the problem.
