Impact crusher is a new type of high efficiency crushing equipment. It is characterized by small volume, simple structure, big crushing ratio (up to 40), less energy consumption, large production capacity, uniform end product size, and selective crushing effect, is a very promising devices. But it is the chief drawback of plate hammer and counterattack plate is easy to wear and tear, especially broken hard ore and abrasion is more serious, often need to change. At present due to the emergence of some wear-resisting material, has been applied in some metal concentrator.
Impact crusher, because of the number of the rotor are different. Is divided into two kinds of single rotor and dual rotor. The Impact crusher rotor is fixed on the main shaft, the rotor on the cylinder is equipped with three (or more) hard board hammer. The ends of the shaft installed in the body of the two roller bearing, by a motor to drive directly (or the pulley). A friend before and after the rotor casing wall hanging above have two back plate. Counterattack plate and indirect has many chain consisting of a chain of feed. It covered the whole of the crushing cavity, in order to avoid the material being counterattack plate collision spill feed, one end of the back plate is hung on the chassis suspension shaft, on the other side is through the pull rod, nut hanging over the chassis, the Angle of the back plate can be adjusted by rod and nut and its spacing with board hammer. Chassis, counterattack plate and plate hammer is the most easily worn parts, so on the chassis, counterattack plate and plate hammer are equipped with a layer made of high manganese steel wear-resisting material plate.
Impact crusher despite the plate hammer and counterattack plate wear big shortcoming, but with the constant improvement of the quality of wear-resistant materials as well as the improvement of crusher structure will gradually be overcome.