Analysis of the motion characteristics of jaw crusher

The crushing of material in jaw crusher is mainly realized by the mutual movement of moving jaw plate and fixed jaw plate, which mainly depends on the movement law of moving jaw, so it is very necessary to study the movement characteristics of moving jaw, and it is especially important to make the movement of moving jaw more in line with the actual needs by changing some parameters, these variable parameters can be suspension height, crank length, inclination angle of moving pellet, etc., and adjusting one or several of these parameters can provide a design space. Adjusting one or more of these parameters provides a design space that can be analyzed point by point to obtain a breakable design area. In fact, the compound jaw crusher is a four-rod mechanism from the structure, and it is a crank rocker mechanism, and the crank rocker trajectory of the jaw crusher shows that the jaw crusher has both horizontal and vertical strokes, and its trajectory is basically closed and oval-like, and the closer it is to the discharge port, the flatter it is.

The crushing performance of jaw crusher depends on one important factor, that is, the stroke characteristic value of the moving jaw, if the horizontal stroke of the moving jaw is expressed by S, the vertical stroke of the moving jaw is expressed by h, and the stroke characteristic value is expressed by m, then the stroke characteristic value can be expressed by the formula m=h/s. In general, the upper part of the moving jaw crushes a single particle material, the particles are generally larger, and the particles of larger materials require a larger compression when crushing, which requires a large horizontal stroke, i.e., the stroke characteristic value should be small, which is beneficial to the crushing of materials. The crushing space in the lower part of the moving jaw is generally small, and if the material cannot be discharged in time, it may cause blockage of the material, which requires the vertical stroke at the discharge port of the moving jaw to be large, because the vertical stroke is beneficial to the discharge of the material, that is, the stroke characteristic value should be large, and the vertical stroke at the discharge port is larger than the stroke at the inlet port. However, the jaw stroke should not be too small or too large at the inlet or discharge. If the value at the inlet is too small, the horizontal stroke will exceed the compression required for material crushing, resulting in unnecessary energy consumption. If the value at the discharge opening is too large, it will cause the dynamic collar plate to grind too quickly, which will reduce its service life. We are mainly discussing the multi-parameter adjustable jaw crusher, through the above analysis, we can see that the stroke characteristic value of the moving jaw is more important, which provides the basis for the design of this type of crusher in the future, i.e.: the design of the crusher, by adjusting one or some parameters can make its moving jaw stroke characteristic value reach the ideal value. Therefore, it is especially important to understand the characteristics of jaw movement trajectory for designing multi-parameter adjustable jaw crusher.

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