Hammer crusher is the use of high speed rotary hammer impact material, so that it along the natural cracks, bedding surface and joint surface and other weak and broken broken machinery. Hammer crusher is widely used in cement, coal preparation, chemical industry, electric power, metallurgy and other industrial sectors, mainly used for limestone, coal, coke, shale, white to, gypsum, slag and other hard and soft materials for medium and fine crushing.
There are many types of hammer crusher structure, according to the number of rotating shaft, can be divided into single rotor and double rotor two categories; According to the rotation direction of the rotor, it can be divided into irreversible and reversible two types; According to the arrangement of hammer head, it can be divided into single row type and multi row type. According to the connection mode of hammer head on the rotor, it can be divided into fixed hammer type and movable hammer type; According to different uses, it can be divided into general uses and special uses.
No matter what kind of hammer crusher, they are mainly by impact to break the material. The material is fed into the crusher and immediately crushed by the impact of the hammer head of high speed rotation. The crushed material, which receives kinetic energy from the hammer head, is crushed a second time by striking at high speed against the lining and basketry of the inner wall of the housing. After that, the material smaller than the gap of the hedge strip will be discharged from the gap, and the granular material with larger particle size will be broken by the additional impact of the hammer head. During the whole process of material crushing, the materials will also impact and smash each other.
The advantages of hammer crusher: high productivity, large crushing ratio, simple structure, compact size, less power consumption, product particle size uniformity, less crushing phenomenon, simple maintenance, repair and replacement of vulnerable parts easy.
The disadvantages of hammer crusher: hammer head, hedge strip, lining plate, rotor disc wear faster, especially in the crushing of hard materials, wear faster; When the moisture content of the crushed material exceeds 12% or it contains mottled soil, its labyrinth is easily blocked, resulting in a significant decrease in productivity and increasing energy consumption and wear of hammer and other parts.