PICS INTERNATIONAL Vibratory screens can be used in a variety of ways. Primary, secondary, and tertiary screening can all be done using them. The normal slope angle for PICS INTERNATIONAL VS screens is 18o, but this can be adjusted for specific purposes. It has spray pipes and can be used for wet screening.
The Vibrating screens are a sieving equipment which has advanced over the years. These efficient screens are used when the classification of the materials is required. High-speed vibrating helps to separate the lighter parts of the aggregate from the heavier ones. Usually, this is used in grading or screening of materials. The process of classifying a material into two or more favorable substances is nearly impossible without the Vibrating Screens. Vibrating Screens make this wondrous job possible because it breaks down the surface tension of the particles. We at PICS INTERNATIONAL , understand the importance of the screens in the world of construction hence we provide one of the finest quality Vibrating screens available in the market.
Excellent performance and high screening capacity.
Circular motion modular vibrators with two bearings per vibrator and a cardan shaft interconnecting them.
The circular motion has a unique angle. MVS Screens can help you get more done in less time.
The modular design is offered in one, two, three, or four decks, with outstanding segregation to meet the needs of the aggregate and mining industries.
Counterweight can be used to modify the stroke length. The grease lubrication system ensures low maintenance and convenience of use.
Vibratory Screen can be used in a variety of applications, including gravel, sand, limestone, granite, minerals, many types of ores, municipal waste, slag, wood and stumps, and shredded cars and metal.
The most crucial screening equipment is vibrating screening. A vibratory screener is a piece of machinery used to remove small quantities of large material from fine material and sort items by particle size. An electromagnetic vibrator that is positioned above and directly attached to the screening surface primarily controls the frequency of the screen.
Vibrating screens are renowned for their sturdy construction, their simple design, and intuitive operation. In comparison to other screeners, they are bought for a lot less money. Additionally, compared to their more complicated counterparts, vibrating screens operate at a far lower energy level and use less electricity. Consequently, the operational expenses of the machine are greatly reduced for the firm. Due to the high frequency vibrations, only the screen medium in this has to be changed on a regular basis. This also assisted in lowering the cost of peripheral equipment maintenance and repair.
Due to system failures and significant wear & tear during use, industrial equipment frequently requires more maintenance. Vibrating screens, on the other hand, are made such that the vibrating forces are exclusively focused on the screening surface. such that the vibration forces do not influence any other components of the machine. Consequently, the machine parts move less frequently, which lowers the total maintenance expenses.
Vibrating screens are the best option for the mining sectors since they provide a wealth of benefits in the overall operations and are set up to meet business needs. It is specifically engineered to produce enough force to distinguish between large particles and fines, improving product recovery. In the end, both improved material quality and increased efficiency to obtain yields.
Vibrating screens give the most robust method to regulate the flow of higher feed among the variety of screening equipment available on the industry market. Having said that, vibrating screens operate best at a constant flow rate. The same screener is capable of supporting material backflow, which calls for a slower feed.
The kind of feeding, equipment characteristics, operating factors, and other factors are only a few of the numerous variables that determine the screening effect. Poor screening quality is caused by clogged sieve holes, severe sieve hole wear, uneven sieve feeding, too much material on the sieve, and inadequate inclination of the sieve surface, among other factors.
When the feed has a high mud and water content, the material will clog the sieve hole and stick to the opening. At this point, it is best to clean the sieve hole before properly adjusting the spray pressure and angle of inclination of the sieve surface.
Long-term usage of the screen causes the screen hole to wear out severely and negatively impacts the screening performance. The worn screen hole has to be fixed right now. The replacement of screen mesh should be taken into consideration when the wear situation is particularly critical.
The material cannot be evenly dispersed throughout the whole sieve surface when the feeding trough of the sieve is too small, making the sieve surface ineffective to use and affecting the screening effect. To make the sieve feeding consistent at this time, the width of the feeding trough needs to be changed.
The increase in feeding volume, clogging of the screen hole, and a low angle of inclination of the screen surface can all contribute to an excessive thickness of material on the screen. It should now be modified in light of the particular circumstances.
The insufficient slope of the screen surface is the most frequent cause of the poor screening effect in circular vibrating screens, hence padding the back support is required. The inclination angle of the screen surface is best for practical applications when it is 20 degrees. Circular vibrating screens typically have an inclination angle of 16 to 20 degrees. The phenomena of the material on the screen not flowing smoothly or rolling upward will happen if the inclination angle is less than 16 degrees.
Because two groups of eccentric blocks with the same mass must rotate in self-synchronization and reverse direction to produce a single exciting force along the vibration direction at each instant, which has a fixed angle with the horizontal direction, so that the screen box can move in a reciprocating straight line, poor screening quality for linear vibrating screens and high frequency vibrating screens may be related to the movement direction of eccentric blocks. The direction of the excitation force and the direction of the vibration will not overlap if they are not in the same phase, and effective screening will not take place.
Generally speaking, the bearing temperature should be kept between 35 and 60. If the bearing temperature is too high during the test run, there may be the following reasons:
The vibrating screen bearing must adopt a big clearance since it supports a heavy load with a high frequency and an ever-changing load. The outer ring of the bearing has to be re-ground to provide a big clearance if the bearing with an average clearance is utilised.
To guarantee proper heat dissipation and the bearing's ability to move axially, there must be space between the cover and outer ring of the bearing. A gasket between the end cap and the bearing seat allows for adjustment of the clearance.
To verify the oil quality and oil injection, the bearings must now be oiled, cleaned, replaced, and sealed. There might also be issues with bearing wear or bearing quality.
The possibility of spring damage, bearing wear, bolt loosening of fixed bearing, unstretched screen, etc. as sources of anomalous sound during sieve operation.
There will be more noise if the spring is destroyed. The spring ought to be changed at this time to avoid production mishaps.
Serious bearing wear will result in loud noises. The machine should be halted at this point, and the bearing quickly changed.
When the sieve is operating, an unusual sound will be produced by the bolt of the fixed bearing loosening. At this point, the bolt has to be properly tightened.
While the screen is not fastened, it will produce unusual sound when it operates and lessen the screening effect. The screen should be timely tightened at this point.
The rotational speed, vibration force, amplitude, and frequency of the sieve are a few of the technical indications of sieve operation. The screen won't start, the amplitude is too tiny, the speed is insufficient, the vibration force is too weak, the four-point amplitude is inconsistent, and other common fault kinds.
The first thing to investigate is whether there is an electrical issue when the vibration screen won't start or when the amplitude is too tiny. Faults may result from motor damage and inadequate voltage. We should begin with the mechanical elements after there are no issues in the aforementioned areas. Whether there is a lot of material on the screen surface or not, it should be removed promptly if so. Similarly, whether the bolts on the coupling of the exciter break off or not, and whether the grease is caked or not, it should be changed promptly if it is.
The electrical issue might be due to insufficient rotating speed. Now is the moment to determine the cause and quickly address it. The transmission tape can potentially be too slack. We should now pull the transmission tape snug.
Weak vibration could be caused by improper or too little weight on the flywheel, thus it's important to change it now.
The asynchronism of two exciters on the same axis or material segregation may be the root of the inconsistent four-point amplitude of sieve. The two exciters should now be adjusted to operate simultaneously in order to get rid of material segregation in time.
After being used for a while, several sieve sections will show severe wear or even break. Fractures in pipe beams, cross beams, screen frames, and other common defects are examples.
Cross beam fracture is primarily caused by prolonged operation at critical frequency, numerous high-strength bolts that should be tightening the side plate are loose, serious deformation of the spring results in significant left-to-right differences, or it may be due to excessive weight error of the eccentric block, which results in structural damage and cross beam fracture. Bolts should be tightened at this time, broken structural components and beams should be replaced, and eccentric block quality should be modified.
Tremor makes the sieve frame vulnerable to breaking. The ideal solution to this issue is to increase the stiffness of the entire sieve frame by thickening the side plate or adding more plate to the local region of the side plate near the exciter.
Vibrating Screen selection is based on the following factors:
One, two, three, or four decks can be arranged for vibratory screens. Even eight screening decks are possible in very precise screening procedures. In the aggregate sector, three decks are quite typical, although the number of screen decks needed depends on how many products the facility has to produce.
The top deck(s) of the screen creates the coarse cut, the middle deck(s) makes a medium cut, and the bottom deck(s) makes the fine cut in a typical application where various products are being created.
PICS INTERNATIONAL has an unmatched commitment to after-sales service. For us, it's not limited to just supplying the parts in time via network of dealers. It's a notch above the competitors which gives us the upper hand.
