Introduction to the classification of jaw crushers

  As far as jaw crushers are concerned, although the structure types are different, their working principles are basically similar, except that the movement trajectory of the moving jaw is different. In a nutshell, when the movable jaw plate cyclically reciprocates to the fixed jaw plate around the suspension axis, and sometimes approaches and leaves, when the movable jaw plate approaches the fixed jaw plate, the ore between the two jaw plates , It is crushed by the combined action of crushing, splitting and bending; when the movable jaw leaves the fixed jaw, the crushed ore is discharged through the discharge port of the crusher under the action of gravity.

  Single pendulum jaw principle. The movable jaw is hung on the spindle and can swing left and right. When the eccentric shaft rotates, the connecting rod reciprocates up and down, driving the two thrust plates to also reciprocate, thereby pushing the movable jaw to reciprocate left and right to realize crushing and unloading. This type of crusher adopts a crank double-link mechanism. Although the movable jaw is subjected to a great crushing reaction force, its eccentric shaft and connecting rod are not subjected to much force. Therefore, large-scale and medium-sized machines are often used in the industry. To crush hard materials. In addition, when this type of crusher works, the motion trajectory of each point on the movable jaw is an arc centered on the mandrel, the arc radius is equal to the distance from the point to the axis, the upper arc is small, and the lower arc is large. The crushing efficiency is low, and the crushing ratio is generally 3-6. Because of the simple movement track, it is called simple swing jaw crusher. The structure of the simple pendulum jaw crusher is compact and simple, and the eccentric shaft and other transmission parts are less stressed; because the vertical displacement of the movable jaw is small, the material is less excessively crushed during processing, and the wear of the movable jaw plate is small. [2]

  The principle of compound pendulum jaw type The upper end of the movable jaw is directly suspended on the eccentric shaft as a crank connecting rod mechanism

  The connecting rod of the jaw crusher work simulation diagram is directly driven by the eccentricity of the eccentric shaft, and the lower end of the movable jaw is hinged and supported on the rear wall of the frame with the thrust plate. When the eccentric shaft rotates, the trajectory of each point on the movable jaw is from the circumferential line of the suspension point (the radius is equal to the eccentricity), and gradually becomes an ellipse downwards. The locus of the connection point is a circular arc. Because the movement trajectory of each point on the movable jaw of this kind of machine is more complicated, it is called a complex swing jaw crusher. Compared with the simple pendulum jaw crusher, the compound pendulum jaw crusher has the advantages of lighter weight, fewer components, more compact structure, better filling degree in the crushing cavity, uniform crushing of the loaded material, and moving the lower end of the jaw The unloading of finished products is mandatory, so the productivity is higher, which is 20-30% higher than the productivity of the simple pendulum jaw crusher of the same specification; the material block has a large up and down movement under the movable jaw, which is easy to assume a cube shape Unload


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