Vibrating screen is a kind of filtering mechanical separation equipment for mud solid phase treatment, which is widely used in mining, building materials, transportation, energy, chemical industry and other industries. It is used for screening of material classification, washing, dehydration and demineralization. The vibrating screen is mainly divided into linear vibrating screen, circular vibrating screen and high frequency vibrating screen. The vibrating screen is composed of vibrator, screen, suspension device, transmission device and other parts. The screen is an important part of the vibrating screen. However, the damage of the screen is too fast, which is one of the common problems of the vibrating screen. What leads to the short service life of the screen? How to improve its service life? Today, experts will make in-depth analysis for you.
The main reasons for the short service life of the vibrating screen are clay accumulation, wrong direction of the motor, loose fit between the screen and the screen frame, and poor quality of the screen. In view of these problems, we will further analyze them.
一、 Clay Accumulation
The vibration amplitude of vibrating screen is too small to effectively overcome the viscous force of clay, which leads to the accumulation of clay on the screen and rapid damage to the screen.
Resolvent:
1. Increase the vibration amplitude;
2. The spraying water is used to wash the screen and clay to reduce the viscosity, but this method is only suitable for the occasion where water is allowed to be added;
3. The screen angle at the end of sand discharge port is adjusted downward to facilitate the discharge of materials by gravity;
4. Change the mesh number of screen or adjust the flow rate of single screen, so that the material can be discharged smoothly.
二、 Motor Steering Error
When adjusting the direction of motor, according to the past experience, the field operator thinks that as long as the material moves forward, this method is only applicable to the linear screen. If the motor rotates to the inside by mistake, the throwing angle is 45 ° forward, but the material has the force to roll backward. At this time, the forward moving speed is much slower, and the material stays on the screen for a long time, and even the material cannot be discharged.
Resolvent:
1. When the screen box is running, press the stop button of the electric control box. At this time, the vibrating screen will stop slowly. Observe the elliptical track formed by the small points on the side plate during the operation of the vibrating screen, and roll to the sand outlet to make the correct direction;
2. Remove the vibrator cover and check whether the eccentric shaft rotates to the outside;
3. Replace any two phase lines in the incoming power supply of the electric control box and sprinkle some sand on the screen. The one with faster sand discharge speed is the right direction.
三、 The screen does not fit tightly with the screen frame
After the rubber strip supporting the screen is worn, the screen can not contact with it reliably; the screen screen is not reasonably tight.
四、 Poor screen quality
Generally, there are upper layer and lower part of the screen. The two layers are required to fit closely. If the screen technology is poor, when the stress layer at the bottom of the screen is tight, the screen layer is not tightened, and the throwing force of materials is greatly reduced during operation, so the screening and discharging can not be carried out smoothly. Solution: replace the screen with high quality.
The main reasons for the short service life of the vibrating screen are clay accumulation, wrong direction of the motor, loose fit between the screen and the screen frame, and poor quality of the screen. In view of these problems, we will further analyze them.
一、 Clay Accumulation
The vibration amplitude of vibrating screen is too small to effectively overcome the viscous force of clay, which leads to the accumulation of clay on the screen and rapid damage to the screen.
Resolvent:
1. Increase the vibration amplitude;
2. The spraying water is used to wash the screen and clay to reduce the viscosity, but this method is only suitable for the occasion where water is allowed to be added;
3. The screen angle at the end of sand discharge port is adjusted downward to facilitate the discharge of materials by gravity;
4. Change the mesh number of screen or adjust the flow rate of single screen, so that the material can be discharged smoothly.
二、 Motor Steering Error
When adjusting the direction of motor, according to the past experience, the field operator thinks that as long as the material moves forward, this method is only applicable to the linear screen. If the motor rotates to the inside by mistake, the throwing angle is 45 ° forward, but the material has the force to roll backward. At this time, the forward moving speed is much slower, and the material stays on the screen for a long time, and even the material cannot be discharged.
Resolvent:
1. When the screen box is running, press the stop button of the electric control box. At this time, the vibrating screen will stop slowly. Observe the elliptical track formed by the small points on the side plate during the operation of the vibrating screen, and roll to the sand outlet to make the correct direction;
2. Remove the vibrator cover and check whether the eccentric shaft rotates to the outside;
3. Replace any two phase lines in the incoming power supply of the electric control box and sprinkle some sand on the screen. The one with faster sand discharge speed is the right direction.
三、 The screen does not fit tightly with the screen frame
After the rubber strip supporting the screen is worn, the screen can not contact with it reliably; the screen screen is not reasonably tight.
四、 Poor screen quality
Generally, there are upper layer and lower part of the screen. The two layers are required to fit closely. If the screen technology is poor, when the stress layer at the bottom of the screen is tight, the screen layer is not tightened, and the throwing force of materials is greatly reduced during operation, so the screening and discharging can not be carried out smoothly. Solution: replace the screen with high quality.