According to the different motion curve, there are two types of jaw crushers, that is, simple pendulum and complex pendulum jaw crusher crusher jaw. At present, jaw crushers in China mainly are complex pendulum jaw crushers; This is because complex pendulum jaw crusher as the new type have better performances. Jaw crusher adopts to discontinuous crushing principle, so the productivity is lower for its impact vibration, energy consumption is higher, and coexistence of the products is not as regular as that of the gyratory crusher. But it possesses the merits of small height of the machine, simple structure, reliable working, easy manufacturing and easy maintenance. No matter what type of crusher is, according to the comparison between the practical requiring the parameter and the basic parameter of the crushers instructions, first the demand of feeding coexistence, discharging coexistence as well as the productivity should be satisfied. Working principles of simple pendulum jaw crusher: Movable jaw hangs in the central shaft, moves from side to side; eccentric shaft rotates, connecting rod moves up and down, thus drive movable jaw move from side to side, to realize the crush and discharge. This crusher adopts crank double linkage structure.
Though movable jaw accepts much crush power, its eccentric shaft and connecting rod don not bear much power. Simple pendulum jaw crusher has simple compact structure, its eccentric shaft and other transmission part bear little power; for the little vertical displacement, its overcrushing ratio is small during the crushing of materials, and its movable jaw plate wears little. Working principles of complex pendulum jaw crusher: Compared with simple pendulum jaw crusher, complex pendulum jaw crusher has the features of light weight, little construction member, compact structure, good admission in chamber, even crush crush of materials. In addition, the productivity is higher20% – 30% than simple pendulum jaw crusher under the same standard. The upper end of movable jaw hangs in the eccentric shaft directamente.