Jaw crusher nip angle design choices

Jaw crusher nip angle should be designed with the concept of a more accurate description of the work state nip angle , is to the mobile jaw crusher plate points to its direction of movement direction of force , and then nip angle design , we can achieve reasonable nip angle design value , thus improving the work of the jaw crusher effect . We originally used the concept should be the name of Nie Nie corner angle , jaw crusher is used to describe the geometry .
1 , the importance of nip angle
Crushing cavity jaw crusher is the crushing process to achieve a work area , its shape parameters directly affect the jaw crusher for mineral crushing force conditions and material environment , a number of parameters, the nip angle design choices is extremely important, it jaw crusher is an important condition for normal operation , the correct choice of nip angle is neither slide up the ore , nor from the crusher feed opening jump out. At present, the commonly used method is based on the design nip angle jaw plate and the friction between the material and the crushing force of the upward force component as the starting point and the calculated equilibrium , the nip angle less than the critical value nuggets will not be squeezed out.
2 , nip angle analysis
Through the jaw crusher main design parameters - Nie angle analysis, we found the current universal design concepts nip angle limitations . Because it is one of the basic assumptions of the force moving jaw direction normal to the direction of the jaw , but the jaw crusher work does not meet the fundamental trajectory of this assumption. It also suggests the concept of work state nip angle , ie jaw crusher actual direction of motion of each point to its direction of force , which truly reflects the meaning of nip angle , and we used the concept of nip angle is defined as the nominal nip angle , as the jaw crusher part geometry . The concept of work state nip angle jaw crusher to improve the performance of the work provides a new way of thinking.
3 , the impact of :
1 , excessive pressure caused by mineral slip angle , the loading effect is reduced , affecting the broken material .
2, the pressure caused by the slip angle is too large exacerbated jaw plate wear.
3, due to the lower third of the crushing chamber is loaded up , inevitably resulting in a lower part of the arch on the material , preventing the material 's natural whereabouts of discharge , the crusher can only unload ore discharge , thereby reducing processing crusher capability.
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