While two vibration motors doing synchronous rotation or counter rotation, the exciting force generated by eccentric block is canceled out with transverse exciting force, and the longitudinal exciting resultant force is passed on the whole screen surface of liner vibrating screen. In this way, the motion track of vibrating screening machine is a straight line. There is an inclination between the exciting force direction and screen surface, under the action of the resultant force of exciting force and material gravity, the materials on screen surface of liner vibrating screen are thrown up and jumped forward in a straight line. In this way, the materials screening and classifying are achieved.
We usually believe that one's character decides products' high quality, the details decides products' excellent ,with the REALISTIC,EFFICIENT AND INNOVATIVE staff spirit for Mining Vibrating Screen, Vimarc Vibrating Motor , Industry Vibrating Feeder , Vibrating Mining Machine ,Motor Vibration Feeder Machine . If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future. The product will supply to all over the world, such as Europe, America, Australia,Johor , Italy ,Hyderabad , Nepal .Since its foundation , the company keeps living up to the belief of "honest selling , best quality , people-orientation and benefits to customers. " We are doing everything to offer our customers with best services and best products . We promise that we'll be responsible all the way to the end once our services begin.
Designed for high-volume screening of powders and liquid slurries, our vibrating sieves will enable you to double your throughput capacity, without increasing floor space. Half the size of a conventional mechanical screening machine, our innovative vibratory sieves require minimal headroom and will fit comfortably into your existing production line; allowing you to increase production capacity whilst minimising investment costs.
Ideal for wet and dry applications, the circular vibratory screener removes impurities and oversized contaminants from products as diverse as paracetamol, powdered milk and anti-corrosive paint. The Russell industrial screens are available in a variety of sizes and mesh options, can be tailored to meet your specific screening and sieving requirements. Variable size and mesh options enable Russell Compact Sieve to deliver a significantly higher throughput, relative to its mesh area, than conventional vibratory screens.
To upscale production of paracetamol, Sri Krishna Pharma required a high quality, high volume screening solution. The Russell Compact Sieve and Vibrasonic Deblinding System was selected as it would allow the pharmaceutical powders to be screened on finer meshes, improving quality without compromising flow rates. A powerful mesh deblinding system applies an ultrasonic frequency to the mesh which breaks the surface tension and prevents fine particles from blocking the mesh screen. Three Russell screeners were installed, improving product consistency and increasing the production yield. Read more
Nestl's new state-of-the-art factory in Chile produces a range of milk powders. Rotary sifters had been used for screening milk powders, but Nestl found that the impeller could force oversized powder through the mesh, compromising product quality. Nestl was looking for a solution that would enable it to improve product quality by screening milk powders using fine meshes, without reducing flow rates. The Russell Compact Sieve more than met the manufacturer's exacting requirements, enabling Nestl to screen the large volume production of milk powder using ultra-fine 2mm meshes (10 mesh). Read more
Profel Extrusion & Finishing, a leading supplier of window and door frames, manufactures its own anticorrosive paint. The small vibratory sieves deployed on its production line did not provide the level of screening required, compromising product quality. Keen to improve product quality and increase its production capacity, Profel replaced their existing sieve with a Russell Compact Sieve and Vibrasonic Deblinding System. The Russell system enabled Profel to eliminate quality issues by accurately screening powders at 150 microns. The low-profile in-line design of the Russell screener significantly improved throughput capacity. Read more
What are the uses of an industrial vibratory sieve?Vibratory sieves are widely used in the processing industries as an efficient way of protecting ingredients and end-products from contamination and lumps. Industrial vibratory screeners are generally made of a single deck containing a mesh which is used for screening out oversize, agglomerates and foreign bodies from liquids and powder. The motor attached to the screen uses an out of balance force to create vibration, which sends the materials through the mesh.
Is a sieve and strainer the same thing?While the word sieves and screens can be used interchangeably, sieves and strainers are not the same thing. Generally sieves can be used to screen powders and liquids, while the term strainer (also referred to as filtration) is more commonly used when referring to screening liquids or slurries.
Whats difference between circular and linear vibratory sieves?The difference between circular and linear vibratory sieves are the way in which the machines are shaped and the motion they use to move materials through the mesh. In linear machines, the back and forth motion allows for powders to move linearly during the sieving process and are not typically used for liquid applications. Round vibrating screeners use a circular vibratory motion and are suited to both liquid and powder applications. While both linear and circular sieves use vibration to process materials, circular screening machines tend to be smaller in size and more hygienic in design, making them easier to fit into processing lines, improving process efficiencies, allow more sanitary screening and reducing labor costs.
This website places cookies on your computer or device to make the site work better and to help us understand how you use our site. Further use of this site (by clicking, navigating or scrolling) will be considered consent. You can review the cookies used at any time using the cookies link.
Super phosphate (SP), triple super phosphate (TSP) or double super phosphate (DSP) as well as diammonium phosphate (DAP) and monoammonium phosphate (MAP) are mainly used as fertilizers and are subject to strict quality requirements. Since phosphate fertilisers are produced in large quantities of several hundred tonnes per hour, even small efficiency deficits lead to high product losses. The aim of the screening process is to achieve high product purities at maximum throughput - and this can only be achieved by preventing clogging of the screen meshes.
The screening tasks in the processing of nitrogenous fertilizers such as ammonium sulphate (AS), ammonium nitrate (AN), calcium nitrate (CN), potassium nitrate (KN), calcium ammonium nitrate (KAS) and urea range from lump separation to the demanding separation of product fractions as well as dust removal. Screening nitrogen fertilizer with high efficiency and throughput requires precise adjustment of all machine parts as well as a well-functioning self-cleaning system, since urea and co. tend to bind air humidity in the dust fraction and thus clog the screen cloth.
To properly separate sugar requires the application of a high frequency directly to the material. The reason is, that sugar can become sticky even at low humidity levels and also tends to clog the sieve mesh, due to its crystalline grain shape. Screening machines with direct excitation of the screen mesh have therefore proven to be not only energy efficient, but also extremely precise. Thanks to the high accelerations, they reliably separate even finest sugars into several fractions simultaneously.
Efficient separation of metal powdersHigh-alloyed metal powders for 3D printing (additive manufacturing/ rapid technology) should be extremely pure to guarantee a high-quality end product. Dust and agglomerates must therefore be reliably removed from the extremely fine powder during production and recycling. A suitable screening machine should not only be highly precise, but also reduce the loss of valuable product and machine downtime to a minimum.
When processing dry mortar into different fractions, the fluctuating grain size distribution of the crushed limestone, as well as its tendency to clog up the screen mesh, lead to great challenges during screening. Efficient and flexible screening equipment can prevent these negative effects. On the one hand, it must be possible to individually adjust the oscillation amplitudes on each screen deck, and on the other hand, an automatic cleaning system is required to keep the screen surface open and thereby ensure throughput and product quality.
In this particular type of drive, two unbalance motors with different speeds are used. Upstream, a large oscillation amplitude ensures the loosening and removal of the material, while downstream, a small oscillation amplitude at higher acceleration ensures that even difficult to screen products are classified accurately.
Linear and circular vibrating screens are a cost-effective alternative to directly excited screening machines. They can be supplied with several screen decks on request and are available in tailor-made special designs. Their low-maintenance unbalance motors and good accessibility through large inspection openings simplify maintenance tasks.
By overcoming cohesion forces, our high-performance dewatering screens achieve maximum dewatering of solid particles from suspensions with optimized residual moisture content for particles down to less than 1 mm. In wet processing, the precise screening technology ensures efficient disagglomeration of the material and thus optimum separation of coarse and fine material.
Believe it or not for over 70 years it has been our objective to manufacture the best screening machines in the world! For our customers, we always aim to deliver the most effective screening machines for their specific task. Of course, we consider our customers technical and commercial constraints, and adjust each screening machine exactly to their wishes and requirements.
RHEWUM screening machines are Made in Germany or more precisely Made in Remscheid for this reason it is no surprise that we are not the cheapest manufacturer of screening machines, but our sophisticated clientele appreciates our established quality. Still not convinced? We will test your material in our technical center and demonstrate to you the performance of our screening machines, live on site! Clear, committed answers instead of cryptic promises are what you can expect from RHEWUM.
There are many kinds of vibration screens, such as electromagnetic vibration screens, circular vibration screens, linear vibration screens, etc. The latter two belong to inertial vibration screens, which are commonly referred to as vibration screens. In daily production, vibration screen will encounter a variety of problems, such as poor screening quality, bearing overheating, abnormal sound, wrong technical indicators and so on.
Table of Contents 1. Poor screening quality1) Screen hole blockage2) serious wear of screen hole3) Non-uniform feeding of sieve4) too thick material on screen5) insufficient inclination of screen surface6) The motion direction of eccentric block is not in the same phase2. Bearing overheating1) too small radial clearance of bearing2) too tight top of bearing cover3) Bearing oil shortage or excessive, oil pollution or inconsistency3. Abnormal sound when the sieve is running1) Spring damage2) Bearing wear3) Bolt loosening of fixed bearings4) Untightened screen4. Technical indicators do not meet the requirements1) The sieve cannot start or its amplitude is too small.2) Insufficient rotational speed of sieve3) The Vibration Force of the Screen is Weak4) The amplitude of four points of the sieve is inconsistent5. Severe or damaged parts of sieve1) Pipe Beam Fracture2) Beam fracture3) Fracture of screen frame
There are many factors affecting the screening effect, including the nature of feeding, equipment factors, operation factors and so on. The reasons for poor screening quality include blocking of sieve hole, serious wear of sieve hole, uneven feeding of sieve, too thick material on sieve and insufficient inclination of sieve surface.
When the mud content and water content in the feed are high, the material will stick to the sieve hole and block the sieve hole. At this time, the sieve hole should be cleaned first, and then the spray amount and the inclination angle of the sieve surface should be adjusted appropriately.
When the screen is used for a long time, the wear of the screen hole will be serious and the screening effect will be seriously affected. At this time, the wear screen hole should be repaired. When the wear situation is very serious, the replacement of screen mesh should be considered.
When the feeding trough of the sieve is too narrow, the material can not be uniformly distributed along the whole sieve surface, which makes the sieve surface inefficient to use, and will affect the screening effect. At this time, the width of feeding trough should be adjusted to make the feeding of sieve uniform.
The excessive thickness of material on screen may be caused by the increase of feeding quantity, blocking of screen hole and small inclination angle of screen surface. At this time, it should be adjusted according to the specific situation.
For the circular vibrating screen, the most common reason for the poor screening effect is the inadequate inclination of the screen surface, so it is necessary to pad the back support. In practical application, the inclination angle of screen surface is more suitable when it is 20 degrees. The inclination angle of circular vibrating screen is generally 16-20 degrees. If the inclination angle is lower than 16 degrees, the phenomenon that the material on the screen is not moving smoothly or rolling upward will occur.
For linear vibrating screen and high frequency vibrating screen, the poor screening quality may be related to the movement direction of eccentric block, because two groups of eccentric blocks with the same mass need to 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. If not in the same phase, the direction of excitation force and direction of vibration will not overlap, and the effect of efficient screening will not be achieved.
Because the bearing on the vibrating screen bears a large load, a high frequency, and the load is always changing, the bearing must adopt a large clearance. If the bearing with ordinary clearance is used, the outer ring of the bearing must be grinded again to make it a large clearance.
There must be a clearance between the cover and the outer ring of the bearing to ensure the normal heat dissipation and certain axial movement of the bearing. The clearance can be adjusted by a gasket between the end cap and the bearing seat.
The technical indicators of the operation of the sieve include the rotational speed, vibration force, amplitude and frequency of the sieve, etc. Common fault types are: the screen can not start or the amplitude is too small, the speed is not enough, the vibration force is weak, the four-point amplitude is inconsistent, and so on.
When the vibration screen can not start or the amplitude is too small, the first consideration should be whether there is an electrical fault. Damage of motor and insufficient voltage can lead to faults. When there are no problems in the above aspects, we should start with the mechanical aspects. Whether the material on the screen surface is heavily accumulated or not, if so, it should be removed in time; whether the bolts on the coupling of the exciter fall off or not, whether the grease is caked; if so, the bolts should be tightened in time and the grease should be replaced.
Insufficient rotational speed may be the electrical reason. At this time, we should find out the reason and deal with it in time. It may also be that the transmission tape is too loose. At this time, we should tighten the transmission tape.
The inconsistency of four-point amplitude of sieve may be caused by the asynchronism of two exciters on the same axis or material segregation. At this time, adjustments should be made to make the two exciters work synchronously and eliminate material segregation in time.
(a) The thin wall of pipe girder may lead to fracture. At this time, the same type of thick wall pipe or the first type of pipe girder should be selected, but it should not be too large or too thick, because this will increase the vibration quality of the sieve and bring many problems;
B) There must be horizontal and vertical pressure strips at the joints of the sieve plates of dehydration and de-mediation screens. If there is no longitudinal pressure strip, water will leak from the gap between the sieve screens and wash down the pipe girders, which are easy to break at the scouring point.
D) If the fracture of the pipe beam is not serious, in order not to affect production, the pipe beam can be repaired to continue to use. When repairing, the weld should be along the longitudinal direction of the pipe beam, and no transverse weld must be allowed, otherwise the pipe beam is more likely to fracture from the transverse weld.
Cross beam fracture is mostly due to the long working time at critical frequency, a large number of high-strength bolts to tighten the side plate are relaxed, serious deformation of the spring makes a great difference between left and right, or it may be that the weight error of eccentric block is too large, causing structural damage and cross beam fracture. At this time, the damaged structural parts and beams should be replaced, bolts should be tightened, and the quality of eccentric blocks should be adjusted.
The sieve frame is liable to break because of tremor. The best way to solve this problem is to thicken the side plate or add additional plate to the local area of the side plate near the exciter to enhance the rigidity of the whole sieve frame.
Thanks for explaining that you should replace screen mesh if it has been used for a long time. This makes sense, because that way you can save money by getting more efficient results. Ill have to look for a wire mesh screen.