Analysis of common failures of mine vibrating screen
Principle of mine vibrating screen:
The screen box relies on two identical vibration motors to do self-synchronous rotation in opposite directions to make the entire screen supported on the shock absorber vibrate linearly. After the material falls into the screen box from the feed end, it moves forward, loosely, and through the screen quickly. Complete the screening operation.
The composition of the mine vibrating screen:
The mine vibrating screen is composed of a screen box, a vibrating motor, a vibration damping system and a chassis.
The screen box is composed of a screen frame, a screen plate, and a lining board.
The vibration motor adopts the high-performance, long-life TZDC series vibration motor as the excitation source. Adjusting the size of the vibration motor’s excitation force can change the vibration amplitude of the screen machine.
The damping system is composed of rubber springs, clamps, and supporting seats. The bottom frame is composed of a silo and a chassis. The vibration motor installation methods of this series of vibrating screens can be divided into upper vibration type and down vibration type, and the vibration damper installation methods can be divided into seat type or hanging type. It can also be designed and manufactured according to user needs.
Mine vibrating screen application
It is mainly used in metallurgy, mining, coal, building materials, electric power, chemical industries and other industries, especially in the metallurgical industry. It has a wide range of uses. It is a commonly used screening machine for blast furnace troughs, coking plants, and mineral processing plants.
The main reasons for the rapid damage of the vibrating screen are the quality of the screen, the tension of the screen, and the problem of material feeding.
a. The quality of the screen is an important factor that causes the screen to break too quickly. If the material of the screen does not meet the screening requirements of the material, the screen will be damaged very quickly. We have listed the classification of the screen and how to choose a suitable screen in the customer’s considerations when choosing a rotary vibrating screen.
b. The tension of the screen is not enough, which causes the screen to vibrate, which is usually broken or damaged along the edge of the screen or at the edge bead.
c. The screen generally has an upper screen layer and a lower stress layer. The two layers are required to be closely attached. If the screen pre-tensioning process is poor, when the stress layer at the bottom of the screen is tightened, the screen If the stratification is not tightened, then the vibration distance of the screen when the screen is working is too large, and the part in contact with the screen frame cannot be effectively compressed, which is also one of the reasons for the rapid damage of the screen.
d. The feeding problem of materials. Because the vibrating screen is constantly feeding materials, if too much material is fed at a time, it will hinder the normal movement of the materials on the screen, which will not only make the screen fatigue and loose, but also greatly reduce the processing capacity of the materials. Giving a large amount of materials at one time will cause the load of the motor that is in unbalanced operation to increase suddenly, not only easy to damage the screen, but also easy to cause damage to the vibration motor, so the materials should be fed evenly when putting in the material. In the feeding method with strong impact force, the vibrating screen must be equipped with a buffer hopper. The direct impact of the material on the screen will consume the exciting force generated by the vibration source, which is more likely to cause damage to the screen and fatigue of the screen.
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