Analysis Of The Classification Of The Jaw Crusher
According to the different motion curve, there are two types of jaw crushers
, that is, simple pendulum jaw crusher and complex pendulum jaw crusher. At present, jaw crushers in China mainly are complex pendulum jaw crushers; this is because complex pendulum jaw crusher as the new type has better performances.
Jaw crusher adopts a discontinuous crushing principle, so the productivity is lower for its impact vibration, energy consumption is higher, and granularity 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 the crusher is, according to the comparison between the practical requiring parameter and the basic parameter of the crushers instructions, first the demand of feeding granularity, discharging granularity 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 crush chamber, even 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 directly. Connecting rod of crank-link mechanism drives directly by eccentric shaft, the lower end of movable jaw connect with the toggle plate and support to the back wall of the rack. When eccentric rotates, the motion curve of every point in movable jaw is circumference of the pendant point (radius equals to eccentricity) gradually down to become ellipse, the lower, the more slanting of ellipse, till the bottom becomes arc with the track of toggle plate junction point. As the motion curve of points in the movable jaw is complex, the machine is called as complex pendulum jaw crusher.
Due to the relatively low productivity of the jaw crusher, most large-scale dressing plants generally adopt the gyratory crusher as in the first-stage coarse crushing. Besides, the reduction ratio of the jaw crusher is smaller than that of the gyratory crusher. The reduction ratio of a gyratory is able to reach 6 to 9.5, on rare occasion it can reach 13.5. But jaw crusher is mostly applied in the first-stage coarse crushing (cone crusher) in the small concentrators as well as quarries. If measured from the feeding, discharging granularity and productivity and these two types of machine can meet the requirement, and then we should make a decision from many aspects as the secondary, tertiary crushers used in the process flow, investment and infrastructural expenditure.
Henan Hongxing Mining Machinery Co.,LTD is a large professional manufacturer of mining machinery. It researches and developments the advanced level jaw crusher by absorbing domestic and foreign advanced technology and combining with market trends. This series jaw crusher can greatly reduce the production costs and air pollution. Now the Hongxing brand jaw crusher is warmly welcomed in the market which is thought as the top one crushing equipment and the most valuable product.
Stone production line : http://www.ore-machine.com/stone-line.html
Hammer crusher : http://www.china-crusher.com/hammer-crusher1.html
by: libby
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