In the mineral processing equipment inside, crushing machine is mainly used to crush ore preliminary materials, which work environment is bad, therefore its constituent bodies need a certain amount of optimization and enhanced, should have the necessary knowledge in order to maintain efficiency in production to improve and equipment stability.
As the jaw crusher set by the dynamic E and E constitute the work of the chamber formed under enormous crushing force and friction materials, easy to wear bad, in order to protect the jaw, Hongsen Mining moving surfaces E and E be installed wear of the liner, this liner is also known as broken boards. Broken plates are usually made of tooth surface, and broken plates tooth peak angle 90 ° ~ 120 °, its size has been broken by the fragmentation properties of the materials and determined, breaking bulk materials, the angle should be bigger; broken small piece of material, the angle can be smaller. Pitch depends on the product size, usually get about equal to the width of the discharge port, the high gear ratio with the preferred pitch of 1 / 2 to 1 / 3.
Work, the broken plate wear rate under the two parts is not the same, lower wear faster than the upper, broken plates in the jaw crusher work, direct contact with materials to withstand the great crushing force and friction materials, broken board lifetime is directly related to jaw crusher efficiency and production costs, therefore, to extend the broken jaw crusher plate life is particularly important. E-board to enhance service life can be broken breaking design, material selection, assembly and use of process improvement and other considerations.
At design time, dynamic E and E of the broken board should be set teeth on the tooth peak valley. Thus, when breaking materials in addition to compression, there are bending and breaking of materials easier. To enhance the life of broken plates, small and medium sized crusher broken down into a board design symmetrical shape, a U-turn immediately after the Department of wear use; large jaw crusher broken board designed a few pieces of each symmetry to be worn exchange use the broken board. Broken plate white cast iron materials can be used. Large white cast iron hardness, good wear resistance, the source is easy and cheap; drawback is brittle, easily broken, short life.
In order to improve the life of broken boards, materials with more than 12% manganese steel manganese better common is ZGMn13. Manganese steel toughness, although the hardness is not high (about 210HB), however, because a cold hardening characteristics, under pressure and will continue to be strengthened, so continue to wear it at work continued to strengthen until the wear and tear can not be used to was scrapped. . Manganese steel casting broken board after going through the tough water treatment, water treatment operations generally tough and quenching the same, that is broken is cast out of manganese steel plate heated to 1000 ~ 1100 ℃ in the water after the rapid cooling. Ren treated water can be uniform microstructure, the microstructure and to fixed to avoid the use of the natural deterioration of the phase change not needed. Manganese disadvantage is more expensive, but life, cost, general considerations, ZGMn13 than the white cast iron long life, low cost.
Assembly, the broken plate must be securely attached to E-board, should be pad level between the two, broken plates and the jaw between the use of soft metal (such as lead, zinc, etc.) for gaskets and bolts tightened. Crusher work, broken plate should not be loosening, or easily broken or worn broken plate, reducing the life of broken plates. Therefore, the assembly must be installed, broken plates, thus extending the life of broken plates.
In the production process, broken plates and materials directly, broken very great, especially when broken material hardness greater, leading to installation of bolts broken plate vibration, nut loose, so that broken plate wear and greatly increase the noise, severe broken off or broken plate to equipment downtime, affecting the normal production. In this situation, just before the start tightening bolts, nuts, can not completely resolve the problems, according to the actual situation on site concrete analysis of concrete, practical ways to methods to solve the problem. For example, you can use spring anti-vibration device to resolve broken loose at work in the loose board, thus prolonging the life of broken boards and improve efficiency.
Specific approach is to use spring anti-loose bolts and self-made compact device, which from the inside spring cover, spring, spring cover is composed of outside, to wear the device in the bolt tightening nut, nut because spring is compressed to a certain degree, have a very strong vibration effect produced by the tremendous force of the bolt broken loose by the spring tension automatically power up, so loose bolts Bu Zhiyu, thus extending the life of broken plates, to increase productivity. In short, the process can be used for specific situations to find ways to solve specific problems, to prevent the broken plate loosening, wear increased, broken, etc., thus extending the life of broken plates, reduce costs and enhance efficiency.
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