Crushing work takes 50% electricity consumption of a whole industry, so the technical principle of "more crushing, less grinding” is put forward to save energy and improve working efficiency.
Crushers are developing into fine crushing, powder crushing, high efficiency and energy saving.
What’s more, with the development of industrial automation, jaw crushers also develop towards automation, for example, foreign products have achieved automated adjustment of feeding speed, size of discharging port and crushing strength.
With the development of road, bridge, construction and other industries, gravel materials have been more and more widely used.
The compressive crushing equipment is most widely used in bulk material breakage.
With respect to the cone crusher, how to improve productivity, reduce energy consumption and improve life are the focus of concern.
And, compressive force of impact crusher has influence on equipment working performance.
So the research of compressive force has outstanding significance to dynamic performance analysis of the machine and wears and life prediction of broken parts.
According to the way of crushing force, crushers can be roughly divided into two categories: crusher and grinding machine.
The crusher usually handles larger pieces of material and coarser product, usually greater than 8 mm.
Its structure is characterized by a certain gap between the crushing members, and they are not in contact with each other.
The crusher can be divided into primary crusher, medium crusher and fine crusher.
Materials processed by grinding machine are generally smaller, and its product granularity is fine-grained, up to 0.074 mm, and even smaller.
Its structure is characterized by broken parts (or medium) coming into contact with each other, and the media are steel balls, steel bars, gravel or nuggets.
However, some machine has both crushing and grinding capacity, such as the roller crushers.
The two rollers of the double roll crusher can not only press the materials, but also grind them.
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