Analysis of Crash Phenomenon of Jaw Crusher Working
“When the jaw crusher was working, it (jaw crusher) stopped there for some reason, and then I had to hurry up to prevent the motor from burning out.” The person who said this was a concentrator. The operator of the jaw crusher, he said that if you can’t grasp its temper, it will often cause the jaw crusher to crash. Therefore, when crushing the material, you must pay attention to the uniformity of the cutting. In addition, the hardness of the material should be based on the hardness of the local material. If it is hard, an additional process can be added.
Under normal circumstances, the factors affecting the work of the jaw crusher are the angle of engagement and the number of revolutions.
The angle of engagement is the angle between the movable jaw and the fixed jaw. According to the calculation, the large engagement angle can reach 32 degrees. In actual use, it is less than 25 degrees, generally around 18-20 degrees. If the biting angle is too large, the ore in the crushing cavity will squeeze upwards, which may hurt people or damage other equipment. At the same time, as the biting angle increases (the crushing ratio increases), the productivity decreases. Adjusting the size of the discharge port will also change the size of the angle of engagement. In actual life, the size of the discharge port is adjusted according to the requirements of the discharge particle size. Therefore, it is reasonable to enlarge the discharge port as much as possible under the requirement of ensuring the product size. The size of the discharge port can be adjusted by adjusting the block. When adjusting the size of the discharge port, pay attention to the relationship between the crushing ratio and the productivity.
Within a certain range, increasing the number of revolutions of the eccentric shaft can increase the production capacity of the jaw crusher, but it will also increase the power consumption per unit weight of ore. If the rotation speed is too large, the crushed ore in the crushing cavity will not be discharged in time, and blockage will occur. On the contrary, the production capacity will be reduced and the power consumption will increase. Therefore, the jaw crusher should have a more suitable number of rotations.
The eccentric shaft, connecting rod, movable jaw plate, shaft and liner of the jaw crusher are the main wearing parts, which require frequent attention to lubrication and replacement.
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