Force characteristics of top-mounted compound pendulum jaw crusher
There are many types of jaw crushers, such as compound pendulum jaw crusher, simple pendulum jaw crusher, top-mounted compound pendulum jaw crusher, etc. This article mainly discusses two of them: compound pendulum jaw crusher Analyze and compare the forces of the upper-mounted compound pendulum jaw crusher and the upper-mounted crusher to understand the characteristics of the upper-mounted crusher.
The two types of crushers are the same except for the different transmission angles and bracket fulcrum positions. They are calculated based on the concentrated crushing force. H is the force diagram of the traditional compound pendulum jaw crusher, and H’is the force diagram of the upper-mounted crusher. Try hard.
Comparison of crusher force
After calculation, it is found that when the other conditions of the two crushers are the same, only β1 β2, the bearing force of the upper-mounted crusher is improved than that of the traditional crusher, but the main bearing bolts of the upper-mounted crusher are not only under tension but also under shear. Bolts can withstand shear force, which is about half the capacity of tensile force.
The production practice has proved that the main bearing of the top-mounted crusher often breaks. The reason is that the main shaft structure of the machine is divided along the horizontal plane, and the bolts are installed vertically and horizontally, so that the bolts are not only subjected to tensile force, but also to shear force. This proves the correctness of the aforementioned force analysis.
The distance from the toggle point of the top-mounted compound pendulum jaw crusher to the center of the main shaft is far greater than that of the traditional crusher. In order to improve this shortcoming, negative suspension can be used to reduce the height of the crusher. But this will make the bolt almost bear pure shear force, so it is also another factor that makes the bolt break and cannot guarantee the normal operation of the crusher. When designing the top-mounted compound pendulum jaw crusher, these force characteristics must be paid attention to.
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