The commonly used vibrating screens now mainly include linear vibrating screens and rotary vibrating screens. In terms of appearance, linear vibrating screens are rectangular. Rotary vibrating screens are circular, also known as circular vibrating screens, which are used for screening and grading materials, but they also have some significant differences:　　Firstly, the linear vibrating screen is mainly used for screening materials with high production requirements, large particles, and low screening accuracy, such as sand, ore, coal, plastic particles, and various granular and powdery materials. However, the rotary vibrating screen is different. It is more suitable for screening small particle materials with low production and fine screening, such as starch, flour, milk powder, seasoning, chemical raw materials, medicinal powder, etc. It is mostly used in the food industry, chemical industry, pharmaceutical industry and other materials.　　Secondly, in addition to screening solid materials, the rotary vibrating screen can also be used in liquid filtration industry, such as juice filtration, soybean milk filtration, ceramic slurry filtration, paint filtration, sewage treatment and other slurry filtering operations. Overall, there is a significant difference between the two, and everyone needs to choose the appropriate vibrating screen equipment based on their industry and usage needs.

　　Linear vibrating screen is a widely used screening equipment nowadays, which has the characteristics of high output, low energy consumption, simple structure, and easy maintenance. It is also a fully enclosed structure with no dust overflow and automatic discharge, making it very suitable for assembly line operations. However, during the use of linear vibrating screens, it is sometimes necessary to adjust the amplitude. Generally, there are two ways to adjust the amplitude of linear vibrating screens:　　The amplitude of the linear vibrating screen is driven by a vibration motor. In this case, adjusting the amplitude mainly relies on the angle between the eccentric blocks at both ends of the motor shaft to change the magnitude of the excitation force. If the angle is large, the excitation force will be correspondingly small, and vice versa.　　1. The amplitude of the linear vibrating screen is driven by the exciter. Adjusting the amplitude can increase (or decrease) the weight of the eccentric block, achieving the goal of increasing or decreasing the secondary eccentricity;　　2. The amplitude can also be adjusted by adjusting the frequency converter. However, it needs to be within the allowable range of the motor. In general, the adjustment of the amplitude of a linear vibrating screen should be based on the characteristics of the vibration source.

　　1. Check whether the screen mesh and the discharge port are level or too high. Generally, they should be about 5mm higher, and the height of the discharge port should be designed differently according to the characteristics of different materials.　　2. When the linear vibrating screen or ultrasonic vibrating screen is working, check whether the screen surface or discharge port is in a horizontal state, which directly affects the screening effect of the equipment; If it is not horizontal, it should be adjusted in a timely manner. The vibrating screen is equipped with supporting feet, and customers can adjust the feet to make the vibrating screen meet the horizontal requirements and lower it appropriately.　　3. In addition to the above situations, the key point is that the angle of the upper and lower eccentric blocks of the vibration motor can be adjusted. A smaller angle allows the material to spread out faster, while a larger angle slows down the material's outward spread. When changing the angle of the eccentric block of the vibration motor, it should be adjusted by about 5 degrees. If you have strict requirements for screening accuracy, the angle of the motor should not be too small, otherwise the material will quickly scatter outward, which is not conducive to the screening effect. Generally, the eccentric block angle of the vibration screen is 45 degrees when it leaves the factory.

　　Just pay attention to the following operations when using the newly purchased linear vibrating screen, and the vibrating screen can achieve ideal screening for materials.　　1. Adjustment of excitation force:　　We all know that the magnitude of the excitation force affects the screening efficiency and output of materials, so adjusting the excitation force of the linear vibrating screen is also very important. Adjusting the eccentric blocks at both ends of the vibration motor can adjust the magnitude of the excitation force of the vibration motor.　　2. Connection of the line:　　Normally, the linear vibrating screen has reserved an outlet head for the indirect wiring of the vehicle. According to the operating steps in the "Motor Circuit Connection" section of the "Linear vibrating screen User Manual", when the vibrating motor is installed on the screen box, the eccentric blocks at both ends of the vibrating motor are not used in one direction, but are installed at a certain angle, and the motor structures on the left and right sides are exactly opposite. It is worth noting that the mating surface of the wiring port thread and the motor junction box must be coated with sealant to prevent water from entering during the screening process.　　3. Addition of lubricating oil:　　After the vibrating screen has been working for 2 months, it is necessary to lubricate each bearing. When adding lubricating oil, be careful not to add too much, as excessive addition will cause the vibration motor winding to overheat.　　4. Installation of screen mesh:　　Normally, the linear vibrating screen mesh is installed and does not need to be operated again, but the replacement of the mesh is also a common operation that needs to be done after later work. Therefore, it is also very necessary to learn how to install screen mesh. The installation steps for the mesh of the linear vibrating screen are very simple, only two steps are needed:　　1) Loosen the tension bolt that fastens the screen mesh, without completely removing the nut. Rotate it 90 degrees to retract it from the long hole of the screen hook plate and remove the screen mesh.　　2) Replace the screen with a new one, tighten the screen so that the left hook plate is in a vertical position, tighten the right screen hook plate, then tighten the left side, and tighten the bolts.

　　The linear vibrating screen relies on two synchronous and out of phase horizontal vibration motors as exciters to make the material bounce up on the screen and perform a jumping linear motion. The linear vibrating screen is also a fine screening equipment with high sales volume among my major vibrating screen manufacturers. The quality can be seen from the following points:　　Carbon steel linear vibrating screen　　1. Thickness of steel plate: Some unscrupulous merchants often like to engage in price wars, but behind their price wars, they are reducing production costs in various aspects. The most direct manifestation is compressing the thickness of steel plates. For example, the thickness of the vibrating body itself should be 10mm, but they are made 8mm or even 6mm thick.　　2. The number of springs: For linear sieves with smaller gender numbers, one spring per corner is sufficient to support the vibration of the sieve surface at the four corners of the linear vibrating sieve. However, when the model of the linear vibrating sieve is larger, such as the 1560 type, there must be two springs supporting each corner, for a total of eight springs supporting the vibration of the entire sieve surface.　　3. There are also some details, such as the need for a single overall bending during molding to prevent powder and material leakage; Choose springs with high stiffness and elasticity; Polishing and polishing require achieving optimal gloss and brightness, among other details. As the saying goes, 'details determine success or failure'.　　By comparing the above points, we can basically see the product quality of the linear vibrating screen.

　　Linear vibrating screen is a screening equipment that uses two vibration motors as the vibration source, and the material moves forward in a linear jumping manner on the screen surface. The material can be successfully classified into two or more specifications through the linear vibrating screen equipment. This type of screening equipment has a large screening output. The numbers in the model of the linear vibrating screen represent the width and length of the equipment. For example, DZSF1020 indicates that the width of this equipment is 1 meter and the length is 2 meters. The width of the linear sieve determines the screening output of the material; And the length determines the screening accuracy of the material. Chemical powders are generally dry materials. In order to increase the screening output of chemical powders, linear vibrating screen equipment can be tried.　　The characteristics of using a linear sieve are:　　1. The output has greatly increased.　　2. The number of layers for a single screening is also higher than that of a rotary vibrating screen: the maximum number of layers for a single screening of a linear screen is generally 5; The maximum number of layers for a vibrating screen is 3. Therefore, if multiple particle sizes of materials are required, a linear vibrating screen is also an efficient choice.　　Therefore, the selection of equipment for material screening is not fixed, and it is necessary to consider its screening output and accuracy to comprehensively determine which equipment can better meet its production needs.

　　One of the effective measures to protect the linear vibrating screen is the wear-resistant coating.　　The functions and methods of using wear-resistant coatings generally include the following two aspects:　　1、 Linear vibrating screens are generally easy to operate, require a large amount of work, and have high efficiency. The materials screened are usually large or hard, and long-term use may inevitably cause wear on the coating.　　If the degree of wear is high, the function of the coating will also fail, so wear failure is one of the main forms of failure for these wear-resistant coatings on vibrating screens.　　The wear failure mechanism varies for different types of coatings. But in terms of the main aspect, it is deformation and wear caused by insufficient coating strength.　　In response to this issue, the linear vibrating screen industry has come up with a solution. When using coatings, we can introduce benzene rings or other rigid segments into the coating to increase the degree of polymer cross-linking and polar group content, and fully utilize hydrogen bonds to enhance intermolecular forces; It is also possible to increase rigidity by adding some corundum, quartz, or metal powder.　　Both methods have their own advantages, and we can make a choice based on actual needs. The latter may have some adverse effects to varying degrees.　　2、 The adhesion failure of the coating on the linear vibrating screen is another major reason for the failure of the wear-resistant coating.　　Ensuring that the coating does not peel off in practical applications is a key factor in the success or failure of coating applications.　　Some manufacturers use coating adhesion techniques that are unsuccessful, and the quality of the tree branches or adhesives used is poor, making them easy to peel off in water or cold conditions.　　Therefore, high-strength adhesives and improved resins should be used as much as possible to increase the content of polar groups and achieve better adhesion between the two in a straight line.　　The higher the viscosity of the improved coating, the stronger the coating on the linear vibrating screen, making it less likely to fall off easily. This is a great protective effect for the linear vibrating screen.

　　Analysis on the problem of material deviation during the use of linear vibrating screen:　　The use of linear vibrating screens is becoming increasingly common due to their widespread application in various industries, and the problem of material deviation has been a long-standing issue. The following is a summary of the reasons for material deviation in linear vibrating screens.　　1. Installation issues with vibration motors　　Due to the fact that the transportation and screening of materials by the linear vibrating screen is carried out through the vibration source body - the vibration motor - which provides a designed fixed direction and fixed size of excitation force to push the material. Therefore, when there is poor material transportation, it can be basically judged that there is a problem with the installation angle of the vibration motor.　　2. Not feeding evenly as required　　If you have read the manual of the linear vibrating screen in detail, you should know that the repeated requirement is: uniform feeding. If there are fluctuations in the amount of material fed, it is easy to cause unstable screening accuracy, and the deviation of material stress due to the amount of material can lead to the problem of discharge deviation.　　3. Aging and loosening of components　　In addition to the vibration motor providing the main screening power for the linear vibrating screen, the damping springs in the linear vibrating screen also affect the screen force and the horizontal stability of the screen body to some extent. As the saying goes, one pull can move the whole body. If a component experiences aging or other issues, it can cause the discharge direction to deviate due to uneven screening surfaces, unstable screening machines, etc. In severe cases, there may even be sudden abnormal noise, severe wear of vibrating screens, and reduced lifespan. Therefore, it is very necessary to regularly inspect and maintain the equipment, and the materials used for the components are also crucial.　　4. Screen box deformation　　The sieve box refers to the part above the vibration motor and below the feeding port, consisting of a sieve frame and the sieve surface fixed around it. Under normal operation of the linear vibrating screen, especially for large and high-frequency linear vibrating screens, the screen frame requires both the gravity of a large batch of screened materials and the strong excitation force of the vibration motor. If the strength is not sufficient, it is easy to cause deformation, damage, and other problems. The strength of the screening box mainly depends on the manufacturer's material selection, welding process, and additional stable design.　　In summary, the operation of a linear vibrating screen is related to many aspects, including the manufacturer's material selection quality, manufacturing process, and whether the customer's installation, operation, and maintenance are standardized. When there is a problem of material deviation, customers can eliminate the problem one by one based on the above factors and find corresponding solutions.

　　Classification of vibrating screens:　　Vibration screening equipment can be divided into mining vibrating screens, lightweight fine vibrating screens, and experimental vibrating screens according to their weight and usage.　　Mining vibrating screens can be divided into: high-efficiency heavy-duty screens, self centering vibrating screens, elliptical vibrating screens, dewatering screens, circular vibrating screens, banana screens, linear vibrating screens, etc.　　Lightweight fine vibrating screens can be divided into: rotary vibrating screen, linear screen, straight row screen, ultrasonic vibrating screen, filter screen, etc. You can refer to the vibrating screen series.　　Experimental vibrating screen: please refer to the experimental equipment for tapping screen, top impact vibrating screen machine, standard inspection screen, electric vibrating screen machine, etc.　　According to the material running trajectory of the vibrating screen, it can be divided into:　　Divided by linear motion trajectory: Linear vibrating screen (material moves forward in a straight line on the screen surface).　　Divided by circular motion trajectory: circular vibrating screen (material moves in a circular motion on the screen surface) structure and advantages.　　Divided by reciprocating motion trajectory: fine screening machine (material moves forward in a reciprocating motion on the screen surface).　　Vibration screens are mainly divided into linear vibration screens, circular vibration screens, and high-frequency vibration screens. The vibrating screen can be divided into single axis vibrating screen and double axis vibrating screen according to the type of vibrator. A single axis vibrating screen uses a single unbalanced weight to excite the screen box, causing the screen surface to tilt and the motion trajectory of the screen box to be generally circular or elliptical. Double axis vibrating screen is a type of screen that utilizes synchronous and opposite rotation of unbalanced weights to excite vibration. The screen surface is horizontal or gently inclined, and the motion trajectory of the screen box is a straight line. There are various types of vibrating screens, including inertial vibrating screens, eccentric vibrating screens, self centering vibrating screens, and electromagnetic vibrating screens.　　Linear vibrating screen:　　Vibration screen is a widely used screening machinery in industries such as coal, used for material classification, washing, dehydration, and media removal. Among them, the linear vibrating screen has been widely used due to its high production efficiency, good grading effect, and convenient maintenance. During the working process, the dynamic performance of the vibrating screen directly affects the screening efficiency and service life. The vibrating screen uses a vibration motor to excite the material as a vibration source, causing it to be thrown up on the screen while moving forward in a straight line. The material is evenly fed from the feeder into the feed inlet of the screening machine, and through multiple layers of screens, several specifications of sieved and undersized materials are produced, which are discharged from their respective outlets. Linear vibrating screen (linear screen) has the advantages of stability, reliability, low consumption, low noise, long service life, stable vibration mode, and high screening efficiency. It is an efficient and new type of screening equipment widely used in industries such as mining, coal, smelting, building materials, refractory materials, light industry, and chemical industry.　　Circular vibrating screen:　　Circular vibrating screen (circular vibrating screen) performs circular motion and is a multi-layer, high-efficiency new type of vibrating screen. The circular vibrating screen adopts a cylindrical eccentric shaft exciter and a bias block to adjust the amplitude. The material screening line is long, and there are multiple screening specifications. It has the characteristics of reliable structure, strong excitation force, high screening efficiency, low vibration noise, durability, easy maintenance, and safe use. The circular vibrating screen is widely used in product grading in industries such as mining, building materials, transportation, energy, and chemical industry. According to the material product and user requirements, high manganese steel woven screen, punched screen, and rubber screen can be used. There are two types of screen: single-layer and double-layer, and each type of screen can meet different screening requirements. This series of circular vibrating screens is seat mounted. The adjustment of the inclination angle of the screen surface can be achieved by changing the position and height of the spring support.　　Elliptical sieve:　　Elliptical sieve refers to a vibrating screen that follows an elliptical motion trajectory, which has the advantages of high efficiency, high screening accuracy, and wide applicability. Compared with ordinary screening machines of the same specifications, it has a larger processing capacity and higher screening efficiency. Suitable for solvent and cold sintered ore screening in the metallurgical industry, ore grading in the mining industry, and grading, dewatering, and desliming operations in the coal industry. It is an ideal substitute for existing large vibrating screens and imported products from abroad. TES three-axis elliptical vibrating screen is widely used for screening operations in quarries and sand and gravel materials, and can also be used for product grading in coal selection, mineral processing, building materials, construction, and power chemical industries.　　Screening principle: Power is transmitted from the motor to the active shaft of the exciter and the gear vibrator (with a speed ratio of 1) through a V-belt, achieving three shafts rotating at the same speed to generate excitation force. The exciter is connected to the high-strength bolts of the screen box, producing elliptical motion. The material moves along with the high-speed elliptical motion of the screening machine on the screen surface, quickly layering, sieving, and moving forward, ultimately completing the classification of the material.　　The obvious advantages of three-axis elliptical sieve:　　The three-axis drive can generate ideal elliptical motion in the screening machine, which combines the advantages of circular vibrating screen and linear vibrating screen. The elliptical trajectory and amplitude can be adjusted, and the vibration trajectory can be selected according to the actual material condition, which is more advantageous for difficult to screen materials;　　Three axis drive forced synchronous excitation can enable the screening machine to obtain a stable working state, which is particularly advantageous for screening with large processing capacity requirements;　　The three-axis drive improves the stress state of the screen frame, reduces the load on a single bearing, evenly distributes the force on the side plate, reduces stress concentration points, improves the stress conditions of the screen frame, enhances the reliability and lifespan of the screen machine, and lays a theoretical foundation for the large-scale development of the screen machine.　　Due to its horizontal installation, the height of the unit is effectively reduced, which can well meet the needs of large and medium-sized mobile screening units. Thin oil lubrication of bearings effectively reduces bearing temperature and improves service life; With the same screening area, the yield of elliptical vibrating screen can be increased by 1.3-2 times.　　Thin oil vibrating screen:　　The thin oil vibrating screen has a large processing capacity and high screening efficiency; The vibrator adopts a bearing lubrication with thin oil and an external block eccentric structure. Has the characteristics of high excitation force, low bearing load, low temperature, and low noise (bearing temperature rise less than 35 ° C); The vibrator is easy to disassemble, maintain, and replace as a whole, greatly reducing the maintenance cycle (replacing the vibrator only takes 1-2 hours); The side plate of the screening machine adopts whole plate cold work, no welding, high strength and long service life. The connection between the crossbeam and the side plate is made with high-strength bolts that resist torsion and shear, without welding, and the crossbeam is easy to replace; The screening machine adopts rubber spring vibration reduction, which has the advantages of low noise, long service life, smooth passing through the common vibration zone, and low dynamic load on each fulcrum of the screening machine compared to metal springs; The connection between the motor and the exciter adopts a flexible coupling, which has the advantages of long service life and low impact on the motor.　　This screening machine series is widely used for grading operations in industries such as coal, metallurgy, hydropower, mining, building materials, chemical, power, transportation, and ports.

　　Rotary vibrating screen is the most widely used in the vibrating screen family, because of its shape characteristics and the characteristics of screening materials, it is also called a round vibrating screen or a round screen powder machine. Its applicable materials are very wide, and liquids, granules, and powders can be sieved. It is precisely the liberalization of customization and high penetration that has created a high market share of rotary vibrating screens. Then, the precautions for the start-up operation of the rotary vibrating screen have become the things that the rotary vibrating screen manufacturers need to synchronize and popularize, so that users can use it better. The precautions before turning on the rotary vibrating screen will be popularized today.　　1. Remove the transportation support frame:　　In order to avoid damage to the shaker equipment during transportation, the rotary vibrating screen manufacturer will install three support frames made of flat steel before leaving the factory. The user requires that the support frame must be removed before the first startup. Otherwise, the rotary vibrating screen cannot operate normally, and there are signs to indicate the installation position of the support frame, and the general position is near the vibration spring.　　2. Check the tightening of the accessories of the rotary vibrating screen:　　Before using the equipment, carefully check the firmness of the vibration motor, locking ring, shock-absorbing spring and other components; check the fasteners of the vibrating screen, the bolts of the whole machine are tightened in place before leaving the factory, but the user is required After using for a period of time, the bolts of the whole machine are required to be tightened again, and the bolts will loosen under the condition of stress relief. If any looseness is found, it should be tightened in time.　　3. Fixed corner:　　Since the vibrating screen is a screening purpose achieved by vibrating motor, high-frequency vibration will be generated during screening, and the phenomenon of the overall movement of the screen machine will be generated. Therefore, the bottom barrel needs to be fixed at the corner when it is used for the first time, which can effectively protect the equipment and Improve screening efficiency.　　4. Screen tightness:　　The tightness of the screen of the rotary vibrating screen is generally installed in place before leaving the factory, but the equipment made by some small manufacturers is difficult to say. The user should pay attention to the tightness of the screen when using the rotary vibrating screen for the first time, the screen is too loose Material penetration rate will drop.　　5. Check the running direction of vertical vibration motor:　　Vertical vibration motor is the vibration source of the rotary vibrating screen equipment. The rotation direction of the vibration motor has a certain influence on the screening performance. The direction of the vibration motor normally rotates clockwise. In addition, users can flexibly adjust the angle of the eccentric block of the vibration motor and change the material screening method. The user should adjust the eccentric block to the appropriate position according to the different moisture content, viscosity and specific gravity of the material.　　6. After the feeding is completed, let the round sieve powder machine continue to run for about 5 minutes, so that the screen and bottom materials are completely discharged to avoid the residual materials from getting wet, the next screening effect of the sound, or due to the replacement of materials and mesh The problem of mixing.