Used Jaw Crusher

Customer's Background:

The solution of the jaw crusher returning phenomenon


The jaw crusher is mainly used for medium-sized crushing of various ores and bulk materials, and can crush materials with compressive strength of not more than 320Mpa, which are divided into coarse and fine broken. The PE series jaw crusher has complete specifications and its feeding size is 125mm~1200mm, which is the primary crushing equipment. The equipment is mainly used for coarse, medium and fine crushing of various ores such as limestone, calcium carbide, calcium carbide shale, shale, basalt, river pebbles and bluestone. It is used in cement plants, sand and gravel plants, stone plants, thermal power plants, desulfurization and calcium carbide plants. The effect is remarkable, and it is widely used in mining, metallurgy, chemical industry, building materials, water conservancy, transportation and other industries. The large and medium-sized jaw crusher is one of our company's fist products, especially in the design and production of large jaw crushers, which are already at home and abroad.

Jaw crusher working principle

Main structure: frame, eccentric shaft, large pulley, flywheel, side guard, bracket, bracket rear seat, gap screw, return spring, fixed raft and movable raft, etc. effect. The crushing method of this series of jaw crushers is a curved extrusion type. The motor drives the belt and the pulley, and moves the movable jaw up and down through the eccentric shaft. When the moving jaw rises, the angle between the bracket and the moving jaw becomes larger, thereby pushing the movable jaw to approach the fixed jaw, and at the same time the material is squeezed, Multiple crushing such as smashing and grinding. When the moving down, the angle between the bracket and the moving jaw becomes smaller, and the moving jaw leaves the fixed plate under the action of the pull rod and the spring, and the broken material is discharged from the lower opening of the crushing chamber. Mass production is achieved as the motor continuously rotates and crushes the machine for periodic crushing and discharging. The jaw crusher produced by Henan World Expo Machinery Co., Ltd. is at the domestic level.

Jaw Crusher Performance Features

  • 1. The crushing ratio is as high as 15 or so, and the particle size is uniform;
  • 2, gasket type discharge opening adjustment device, large adjustment range, reliable operation;
  • 3, high production efficiency, low energy consumption, compared with the ordinary fine jaw crusher, the processing capacity is 20-35% higher than the same specification, and the energy consumption is reduced by 15-20%;
  • 4. The crushing chamber is deep and there is no dead zone, which improves the feeding capacity and output;
  • 5. The wear of the double-curved raft is small, and the life of the raft can be extended by more than 3-4 times under the same process conditions, which is more obvious for high-abrasive materials;
  • 6. The lubrication system is safe and reliable, the parts are easy to replace, and the maintenance workload is small;

The solution of the jaw crusher returning phenomenon

The returning phenomenon occurs during the working process of the jaw crusher, which not only reduces the crushing capacity of the jaw crusher, but also affects its production capacity and must be eliminated. When the angle of the seesaw is enlarged, the jaw crushing machine will have a returning phenomenon. On the contrary, if the corner of the seesaw will not appear, the returning phenomenon will not occur.

The jaw crusher solves the problem of returning the material, which is to solve the problem of the angle of the seesaw. The specific measures taken are as follows:

In the processing and manufacturing of the Cangwu crusher, it is processed and produced in strict accordance with the drawings, ensuring that the slab angle meets the technical requirements of the drawing design. According to the situation of materials waiting to be broken, the user is provided with a crusher of suitable specifications. (3) When the seesaw wears, the returning phenomenon occurs, and the user should be instructed to replace the new seesaw in time. When the material particle size difference is too large, the first screening is carried out, so that the materials with the same basic difference are all broken together; for the material with stricter particle size requirements, the large jaw crusher is used for pre-processing, and then the fine jaw type is used. The crusher is finished to ensure the processing requirements of the material.

When there is a returning phenomenon, and other conditions cannot be changed, a wedge-shaped pad is added at the joint surface of the movable jaw and the movable jaw to reduce the angle of the seesaw to satisfy the angle of the seesaw.

The reason why the jaw crusher appears to return to the material during work is mainly the angle between the two jaws, which is too large for the friction between the material and the jaw, so that there is not enough between the jaw and the material. Due to the large friction force, the jaw crusher should not produce the phenomenon of returning material. The angle of the slab must be made, and a series of measures such as selecting materials, styling, structurally ensuring or reducing the angle of the slab can be adopted to eliminate The purpose of the return phenomenon.

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