Vibrating Screen is an important sorting, grading equipment in mining, metallurgy, chemical industry production process, which works to promote inclusion and layered materials through the
sieve through the sieve body vibration, thus achieving material sorting, grading purposes. Finding faults and solving them in time to ensure stable operation of the vibrating screen is not only conducive to improving production efficiency, but also has important significance for subsequent sorting operations.
Troubleshooting
I. The circular vibrating screen cannot be started or the amplitude is small.
Possible causes and solutions:
1, the motor is damaged
The motor is damaged and the motor is replaced.
2. Damage to electrical components in the control circuit
The electrical components in the control circuit are damaged and the electrical components are replaced.
3, the voltage is insufficient
The voltage is insufficient to change the power supply.
4, the screen material piled up too much
The screen material is too much to be piled up and the screen material is cleaned.
5, the vibrator is faulty
The vibrator malfunctions and the vibrator is repaired.
6. Grease in the vibrator becomes thick and agglomerated.
the vibrator is cleaned, and the appropriate grease is added. 3# grease
II. the material flow movement is abnormal
Possible causes and solutions:
1, the screen box horizontal level is not found
The horizontal level of the screen box is not corrected, and the height of the bracket is adjusted.
2, the support spring steel is too large or damaged
The spring of the support spring is too large or damaged, and the spring is adjusted.
3, the circular vibrating screen is damaged
The surface of the circular vibrating screen is broken and the screen surface is changed
4, the circular vibrating screen feeding material is extremely unbalanced
The circular vibrating screen feedstock is extremely unbalanced, evenly operated, and stable feedstock.
Third, the vibrating screen screening quality is not good
III. Possible causes and solutions:
1. Screen hole blockage
When the mud content and water content in the feed are high, the material will stick to the mesh hole and block the mesh hole. At this point, the sieve hole should be cleaned first, and then the water spray volume and the screen inclination angle should be appropriately adjusted.
2, round vibrating screen into the sieve material moisture increase
The circular vibrating screen enters the sieve material to increase the moisture and change the screen box inclination.
3. Uneven feeding of the
Sieve Machine When the feed trough of the sieve is too narrow, the material cannot be evenly distributed along the entire sieve surface, so that the sieve surface cannot be effectively utilized, and the screening effect is affected. At this point, the width of the feed chute should be adjusted to make the feed of the sieve uniform.
4, the thickness of the circular vibrating screen is too thick
The excessive thickness of the material on the sieve may be caused by the increase of the feed amount, the obstruction of the sieve hole, and the small inclination of the sieve surface. At this time, it should be adjusted according to the specific circumstances.
5, the screen is not tight, the transmission belt is too loose
The screen is not pulled tightly, the drive belt is too loose, and the drive belt is tightened.
IV. When the vibrating screen works normally, the rotation of the screen machine slows down, and the bearing heat causes
Possible causes and solutions:
1, the bearing lacks lubricating oil
The bearing lacks lubricating oil and injects lubricant into the bearing.
2, bearing blockage
The bearing is blocked, the bearing is cleaned, the seal is replaced, and the labyrinth seal is inspected.
3, the bearing is overfilled or added to the unsuitable oil
If the bearing is overfilled or if an unsuitable oil is added, check the bearing lubricant.
4, the circular vibrating screen bearing damage or poor installation, the eccentric block on the round wheel off, the size of the eccentric block is different, the labyrinth seal is jammed
The circular vibrating screen bearing is damaged or poorly installed. The eccentric block on the round wheel falls off, the size of the eccentric block is different, the labyrinth seal is replaced by a jam, the eccentric block is installed, and the round wheel is adjusted.
5. The parts of the sieve are seriously worn or damaged.
V. Possible causes and solutions:
1. Tube beam fracture
If the wall of the tube beam is too thin, it may cause breakage. In this case, the same type of thick-walled tube or the larger type of tube beam should be used. However, it should not be too large or too thick, because it will increase the quality of the sieve and cause many problems. According to the experience, when the screen width exceeds 3m, it is better to use two channels.
2, the beam breaks
The beam breakage is mostly due to the working time at the critical frequency is too long, the high-strength bolts of a large number of fastening side plates are slack, and the springs are severely deformed, so that the difference between the left and right heights is extremely large, and the weight error of the eccentric mass may be too large, causing damage to the structural parts. The beam is broken. At this time, the damaged structural parts and beams should be replaced, and the bolts should be tightened to adjust the quality of the eccentric block.
3, sieve frame break
The screen frame is prone to breakage due to tremor. The best way to solve this problem is to thicken the side panels or add attachment to the local area of the side panels near the exciter to enhance the rigidity of the entire screen frame.
Sixth, the sound of the sieve is abnormal
VI. Possible causes and solutions:
1, spring damage
If the spring is damaged, it will cause a lot of noise. In this case, the spring should be replaced in time to prevent production accidents.
2, bearing wear
When the bearing wears seriously, large noise will be generated. In this case, the bearing should be stopped and replaced in time.
3. Loose bolts for fixed bearings
If the bolt of the fixed bearing is loose, the sound will be abnormal when the sieve is running. In this case, the bolt should be tightened in time.
4, the screen is not tightened
When the screen is not tightened, the sound will be abnormal when the sieve is running, and the screening effect of the sieve will be affected. At this time, the screen should be tightened in time.
Seven, the technical indicators of the sieve operation do not meet the requirements
VII. Possible causes and solutions:
1. The sieve cannot be started or the amplitude is too small
When the vibrating screen cannot be started or the amplitude is too small, first consider whether there is electrical fault. Damage to the motor, insufficient voltage, etc. can cause malfunctions. When there is no problem in the above aspects, then from the mechanical side. Whether the sieve surface material is seriously accumulated, if it is, it should be removed in time; if the coupling bolt on the vibration exciter is detached and the grease is agglomerated, if it is, the bolt should be tightened in time to replace the grease.
2, the sieve speed is not enough
Insufficient speed may be an electrical cause. In this case, the cause should be found and dealt with in a timely manner. It may also be that the drive tape is too loose, and the drive tape should be tensioned at this time.
3. The vibration of the sieve is weak.
The reason why the vibration force is weak may be that the weight on the flywheel is incorrect or too light, and the weight on the flywheel should be adjusted at this time.
4. The four points of the sieve are inconsistent.
At this time, it should be adjusted so that the two exciters work synchronously, and the segregation of
