In the jaw crusher structure, wear often occurs, especially in the lower 1/3, the wear situation is more prominent. The wear of the dynamic and static frontal plates can cause the crusher to fail to operate normally and lose the crushing ability. There will be wear and tear in the crusher during its working process, which can be reduced and unavoidable. Wear will shorten the mechanical life, so try to reduce it. The crushing machinery also has some wear and tear in the process of processing ore. In order to minimize the loss of parts, it is necessary to adhere to the scientific selection of models, and rational use and selection of materials. Once the type selection is inappropriate, serious conditions will result in long-term passive production in factories, and light conditions will also result in frequent multi-consumption. The crushing methods are mixed crushing and pre-screening crushing. Mixed crushing refers to the production process in which two kinds of raw materials are fed into a crusher in a certain proportion for crushing. Common mixed crushing are limestone and marl, limestone and shale, limestone and clay, etc. Screening raw materials before crushing, only crushing the screening materials, often can achieve good results. For example, nowadays cement is produced by a new dry process with pre-decomposition, which improves the silicic acid rate in the raw material mixing, and often needs to be mixed with siliceous raw materials.
The contact between the jaw plate and the machine surface is not stable; the eccentric shaft rotates too fast to remove the crushed materials, which results in jamming of the crushing chamber and wear of the jaw plate. Material properties have changed, but the crusher has not been adjusted in time; the angle between the movable jaw plate and the fixed jaw plate is too large to exceed the normal range; The strength and wear resistance of the jaw plate are not good.
Solution of jaw crusher jaw plate wear
The newly installed jaw plate must be fixed tightly, installed well, and the surface of the machine contacts smoothly. A layer of material with good plasticity can be padded between the jaw plate and the surface of the machine. Every batch of materials entering the crusher should be sampled and checked. Once there is a great change in the nature of the materials, the parameters of the crusher should be changed in time to match the materials entering the crusher. We must choose materials with high hardness, wear resistance and strong resistance. Cement enterprises with mine crushing production line technology can exchange the same type of wear jaw plate of mine crushing and cement crushing. The worn jaw plate can be repaired by surfacing. Another is to pay attention to the working process: after the crusher is in normal operation, it can start feeding; The crushed materials should be evenly added into the crushing chamber, and side feeding or stacking feeding should be avoided to prevent unilateral overloading. Under normal conditions, the temperature rise of the bearing does not exceed 35 ℃, and the maximum temperature does not exceed 70 ℃. If the temperature exceeds 70 ℃, the machine should stop immediately and the cause should be found out to eliminate. Before shutdown, the feeding should be stopped first, and the motor can be shut down only after the crushed material is completely discharged from the crushing chamber. When crushing, if the material in the crushing chamber is blocked and stops, the motor should be shut down immediately, and the material must be cleared before starting again. After one end of the gear plate is worn out, it can be used with adjustable head.