Analysis of the causes of the wear of the swaying machine of the compound pendulum jaw crusher

Compound pendulum jaw crusher is widely used in mining, metallurgical and construction industries broken equipment, the actual production process, is the main force jaw jaw crusher parts, as well as the most serious part of the equipment wear . In order to increase the weight of the product and extend the life of the seesaw while saving costs, the Red Star machine considered it necessary to analyze the cause of the wear of the seesaw.

At present the material used on the jaws of the jaw crusher common mostly high-manganese steel, high Meng material upon crushing due to work hardening due to the constant, over time can be seen on the surface of the tooth flank of the plate material due to the constant pressure Rugged, as well as scratches formed by the cutting of the material. It can be seen that the tooth surface wear of the raft is mainly due to the continuous extrusion of the material and the relative sliding between the rafts.

1. Displacement analysis of any point on the movable jaw

Movement characteristics of the discharge end of the compound pendulum jaw crusher: the swing in the vertical direction is larger than the stroke in the horizontal direction. The larger the swing in the vertical direction, the longer the slippage of the material here, resulting in increased wear on the toothed plates here, especially near the discharge opening. Moreover, the chisel wear is larger than the crush wear, and the lower wear of the seesaw is faster than the upper wear. In order to improve the service life of the slab material in actual production, the slab is often adjusted after a period of use, so that the upper and lower parts can be balanced.

2, material movement force analysis

When the moving motion moves upwards, the material first slides relative to the fixed one; when the moving motion moves downward, the material and the moving jaw first slide relative to each Other. In general, the wear of the moving jaws when the material flows in the crushing chamber is mainly due to the extrusion of the material and the jaws, and the relative sliding of the fixed jaw material and the jaw is also the main cause of wear.

3. Failure analysis of the surface wear of the raft

The main factors controlling the wear of the jaw are the hardness and humanity of the material. The hardness of the material determines the depth and size of the material puddle. The hardness of the material is high, the depth of the material pressed into the raft is shallow, the deformation of the surface material of the raft is small, and the amount of material for short-range sliding cutting is also small. The toughness of the material indicates its ability to resist fracture. The toughness of the material is good, the brittle fracture during the extrusion process of the material can be eliminated, and the change process of the slab material before the deformation fatigue is formed is greatly increased.

In short, from the user's point of view, there are many factors affecting the wear of the jaws of the crusher. The Red Star machine believes that in addition to the above points, there are many other factors in the actual production process that will cause the wearer of the crusher to wear. Maximize investment costs.

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