Will you solve these common problems of vibrating screens?

The vibrating screen is a screening equipment capable of grading, dehydration, desliming, de-intermediation, and sorting. The vibration of the sieve body is used to loosen, stratify, and pass through the sieve to achieve the purpose of material separation. The screening effect of the vibrating screen not only has a great impact on the value of the product, but also has a direct impact on the efficiency of the next operation.

In daily production, vibrating screens will encounter various problems, such as bearing heating, parts wear, breakage, and screen hole blockage, wear, etc. These are the main reasons that affect the screening efficiency. Therefore, in order to improve efficiency, Solving these common problems is key to providing security for follow-up operations.

Arc vibrating screen

Vibrating screen bearing heating

In general, during the test run and normal operation of the vibrating screen, the bearing temperature should be kept in the range of 35~60°C. If the temperature exceeds this value, cooling treatment is required. The main reasons for the high bearing temperature are as follows:

1. The bearing radial clearance is too small

The radial clearance of the vibrating screen bearing is too small, which will cause the bearing to wear and heat up, mainly because the bearing carries a large load, the frequency is high, and the load is constantly changing.
Solution: It is recommended that the bearing adopt large clearance. If it is a bearing with ordinary clearance, the outer ring of the bearing can be ground to form a large clearance.

2. The bearing cover is too tight

There needs to be a certain gap between the gland of the vibrating screen and the outer ring of the bearing, so as to ensure the normal heat dissipation and certain axial movement of the bearing.
Solution: If the top of the bearing gland is too tight, it can be adjusted through the gasket between the end cover and the bearing seat, and it can be adjusted to a suitable gap.

3. Too much or too little bearing oil, oil pollution or inconsistent oil quality

The lubrication system can ensure the normal operation of the vibrating screen bearings, prevent the intrusion of foreign matter and sealing effect, and can also eliminate frictional heat, reduce friction and wear, and prevent the bearing from overheating. quality.

Solution: According to the requirements of the equipment, oil should be added to the bearing box regularly to avoid too much or too little oil. If there is a problem with the oil quality, it is necessary to clean, replace the oil and seal in time.

High frequency dehydration vibrating screen

Vibrating screen parts are worn or broken

Some parts of the vibrating screen may be severely worn or even broken after long-term operation. The common worn and broken parts include spring springs, bearings, pipe beams, beams and screen frames.

1. The spring is worn or broken

The spring should be an important part of the vibrating screen for shock absorption and noise reduction. If the spring is worn or broken, it will not only generate a lot of noise, but also cause disorder on the screen.

Solution: The spring should be replaced in time to prevent production accidents.

2. Bearing wear or fracture

The bearing is an important part of the vibrating screen of the vibrating screen. There are many reasons for the bearing to wear or break. Once the wear is serious or broken, it can only be replaced by parking.

3. Pipe beam fracture

Generally, during dehydration or de-mediation, the water scouring force is relatively strong, and water will leak from the gap between the screens to scour the pipe beam. If the wall of the pipe beam is too thin, the pipe beam is easy to break at the scoured place.

Solution: It is suggested that you can prepare with both hands. First, when selecting a vibrating screen, you should choose the same type of thick-walled pipe beam, or a larger model of pipe beam to increase the thickness of the pipe beam wall; The joints of each sieve plate of the screen are provided with horizontal and vertical beading to reduce water leakage from the gap.

Note: If the fracture of the pipe beam is not serious, in order not to affect the production, repair welding can be carried out on the pipe beam to continue to use. When repairing welding, the weld seam must follow the longitudinal direction of the pipe beam, and absolutely no transverse weld seam is allowed, otherwise the pipe beam will Easier to break from transverse welds.

4. Broken beam

The fracture of the crossbeam is mostly due to the long working time at the critical frequency, the looseness of a large number of high-strength bolts fastening the side plate, which seriously deforms the spring, and the difference in height between the left and right causes the crossbeam to break; it may also be that the weight error of the eccentric block is too large, causing Structural damage caused the beam to break.

Solution: Stop to replace the damaged structural parts and beams and tighten the bolts; adjust the quality of the eccentric block.

5. The screen frame is broken

The fracture of the screen frame is generally caused by the shaking of the vibrating screen frame of the vibrating screen.

Solution: The side plate can be thickened, or the side plate near the exciter can be partially thickened (or add additional plates) to enhance the rigidity of the entire screen frame.

Linear vibrating screen

Vibrating screen holes are clogged or worn

1. The sieve hole is blocked

Generally, the clogging of the vibrating screen hole is mostly due to the high mud content and water content in the incoming material, which makes the material stick to the sieve hole and block the sieve hole.

Solution: Firstly, clean the sieve holes, and then properly adjust the water spray volume and the inclination angle of the sieve surface.

2. Screen wear

When the vibrating screen is used for a long time, the screen holes will be severely worn and the screening effect will be affected.

Solution: If the wear of the screen hole is not serious, it can be repaired in time. If the wear of the screen hole is serious, it can be considered to replace the screen.

The above are the common problems of vibrating screens, and they are also the key problems that seriously affect the screening operation. When solving these problems, in addition to finding and solving problems in time, attention should also be paid to the purchase and selection of vibrating screens, so as to effectively improve the operating efficiency of the vibrating screen.

Application of coal centrifuge in coal industry

With the development of clean coal technology, the coal slime water process in coal preparation plants shall be limited by 0.5mm to determine the classification of coal slime. In order to meet the needs of the market, especially the requirements for dehydration of coal slime with particle size of 2~0.5mm in the separation process segmentation , it is necessary to develop a new type of centrifuge.

In this way, the coal can be recovered to the maximum extent, thereby improving the recovery rate of clean coal, improving the economic benefits of coal preparation enterprises, protecting the environment, and saving energy. Such a centrifuge product has a large processing capacity and low product moisture, which greatly reduces the burden on the coal slime water treatment system, achieves good results, and can simplify the coal slime water treatment process.

The centrifuge machine developed this time is mainly used for the dehydration of 2~0.5mm fine coal. The coal centrifuge has the characteristics of small investment, small system transformation, and good process effect. It will become the first choice for the transformation of old plants and new coal preparation plants. , due to the small particle size of the separated solid particles, it can not only be used in the coal preparation industry, but also suitable for solid-liquid separation in the chemical, pharmaceutical, food and environmental protection industries, with good business and social prospects!

The separation and dehydration of coal centrifuge is to use gravity, mechanical force or heating and drying methods to separate solids and liquids to reduce the moisture content of wet materials. The use of wet dehydration operation is an important part of coal preparation in coal preparation plants. The main purpose of coal centrifuge dehydration separation is:

https://www.ly-gaifeng.com/calcium-hydroxide-production-line/hydrated-lime-production-line

 

(1) Reduce the moisture in coal preparation products to ensure the transportation needs. In coal preparation plants, the comprehensive moisture content of various clean coals is generally required to reach 8% to 10%, and the requirement in alpine regions is below 8%. Wet coal preparation will contain a lot of moisture. If coking coal is used for coal preparation, the coal moisture will be high, not only the coking time will be longer, the production volume will be reduced, the amount of gas used for the coke oven will be larger, and the service life will be shortened.

(2) Wash and reuse to save water. Wet coal preparation consumes a lot of water. Under normal circumstances, the jig machine uses 3 tons of water for processing 1 ton of raw coal; 1 ton of raw coal uses 0.7 tons of water, and 1 ton of fine coal requires about 1.2 to 2.0 tons of water, so our water resources will cause a lot of waste.

In addition, before wind coal preparation, if the coal contains a lot of water, it needs to be dehydrated first. Coal separation and dehydration methods include: gravity dehydration, mechanical dehydration, thermal dehydration, physical chemistry, etc. Several commonly used methods are: gravity dehydration, mechanical centrifugal dehydration and thermal heating dehydration. In the coal preparation plant, the dehydration of coal is carried out in stages.

Commonly used dehydration systems in coal plants are:

(1) Block clean coal: dehydration screen dehydration bin.

(2) Fine coal: Douzilaokeng dehydration screen centrifugal dehydrator dryer.

(3) Medium coal or gangue: Dehydration bucket elevator dehydration bin, etc.

(4) Coarse slime: sedimentation tank (cyclone), dehydration screen, centrifugal dehydrator, dryer.

(5) Fine coal slime: thickener filter dryer.

(6) Flotation clean coal: filter dryer.

(7) Flotation tailings: centrifugal dehydrator and filter press, etc. In the coal preparation plant, in addition to the final dehydration of the product, sometimes dehydration is also required in the middle of the coal preparation.

In short, the design features of coal mine centrifuges used in the coal field have significant advantages, large inlet volume, large processing capacity, pressurized lubrication system can prolong the service life, and the maintenance cost is small, the dehydration efficiency is high, and the installation cost is low. Not only that, solid particle recovery High efficiency, convenient replacement of sieve blue lining, flexible structure, durable, easy to maintain, along with our manufacturer’s technical support and on-site service, make our customers better experience, supply to fill the demand of centrifuges in the coal industry.

How should the linear vibrating screen be installed?

The linear vibrating screen is driven by double exciters. When the two exciters are rotated synchronously and in opposite directions, the exciting forces generated by the eccentric blocks cancel each other in the direction parallel to the motor axis, and in the direction perpendicular to the motor axis The stack is a resultant force, so the motion trajectory of the screen machine is a straight line.

The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the self-gravity of the material, the material is thrown up on the screen surface and moves forward in a straight line, so as to achieve the purpose of screening and grading the material. Can be used to automate operations in the assembly line. It has the characteristics of low energy consumption, high efficiency, simple structure, easy maintenance, and fully enclosed structure without dust spillage. The highest sieving mesh number is 400 meshes, which can screen out 7 kinds of materials with different particle sizes.

Working principle: The multi-layer powder linear vibrating screen is driven by double vibration motors, and works by the principle of vibration motor excitation. When the two motors rotate synchronously and in opposite directions, the vibration force generated by the eccentric block cancels each other out in the direction parallel to the axis of the motor. Under the combined action of the vibration force and the self-gravity of the material, the material is thrown on the screen surface. Jumping and moving forward in a straight line to reasonably match the screen to achieve the purpose of screening.

Linear vibrating screen

Usually, the linear vibrating screen produced is delivered as a complete machine, so the user basically does not need to consider the assembly of the linear screen equipment. After the equipment is installed, it is self-assembled; sometimes the linear screen user has an irreparable failure in the box and needs to replace the box, or disassemble the equipment when repairing the equipment or moving the equipment over a long distance, which also involves the problem of self-assembly.

Linear vibrating screen is mainly composed of screen box, screen frame, screen mesh, vibration motor, motor pedestal, vibration damping spring, bracket and so on.

1. Screen box: It is welded by several kinds of steel plates with different thicknesses. It has certain strength and rigidity and is the main component of the screen machine.

2. Screen frame: made of pine or wood with less deformation, it is mainly used to keep the screen flat and achieve normal screening.

3. Screen: There are several kinds of screens such as low carbon steel, brass, bronze, stainless steel wire.

4. Motor pedestal: When installing the vibration motor, the connecting screws must be tightened before use, especially three days before the trial of the new screen machine, it must be repeatedly tightened to avoid loosening and causing accidents.

5. Vibration damping spring: prevent the vibration from being transmitted to the ground, and support the full weight of the screen box at the same time. When installing, the spring must be perpendicular to the ground.

6. Bracket: It consists of four pillars and two channel steels, which support the screen box. When installing, the pillars must be perpendicular to the ground, and the channel steels below the two pillars should be parallel to each other.

High frequency dehydration vibrating screen

Installation method of linear vibrating screen

1. Nail mesh: the screen layer on the screen frame, the trawl layer, and mark the mark with a marker to facilitate remembering the position; remove the layer with a hammer or a flat-blade screwdriver; use a rectangular object to raise the two ends of the screen frame (bricks). , square wood, square tube, etc.). The middle of the screen frame naturally sags to form a bow. The screen is 3-5 cm longer than the screen frame. After the screen is cut, one end is nailed to the screen frame with large-headed shoe spikes. The screen is aligned with the outer end of the screen frame, and the shoe spikes are spaced 10-12 cm apart. Then go to the other end and pull the screen tight, and nail the screen to the screen frame in the same way.

2. Equipment installation: Put the sieve support of the linear vibrating screen on the level ground. Note that the support should be placed upwards, not upside down. Take the spring base on the support as a reference, and the spring base should face upwards.

Put the spring on the spring coil of the outrigger and fix it well; lift the screen machine, align the spring coil of the screen machine with the corresponding spring, slowly lower the screen machine and put it down; install the vibration motor. Before use, the connecting screw must be tightened, especially three days before the trial of the new mesh screen machine, it must be tightened back and forth to avoid accidents caused by loosening; avoid vibration transmission to the ground and support the overall weight of the screen box. When installing, the spring must be perpendicular to the ground; lift the prepared linear vibrating screen box and place it on the spring stably. At this point, the linear vibrating screen box is installed.

Precautions:

1. The customer must remove the transport bracket during installation, otherwise it will affect the normal operation of the linear screen and even cause equipment damage.

2. Check the insulation resistance of the vibration motor winding to the ground. If it is less than 20MΩ, it must be dried before use.

3. On the screen body and the upper and lower spring seats of the machine base, the springs should be completely embedded in the spring seats to ensure the balance of the screen body. The vibration part of the screen machine should not have any rigid connection or contact with other objects outside the machine.

4. When starting the machine for the first time, pay attention to observe the running track of the material. If it is wrong, it can be reasonably adjusted to the correct running track according to the screened material.

In summary, this is the whole introduction of the installation method of the linear vibrating screen. Before installation, you must understand its working principle and installation instructions in detail. During the installation process, you must strictly follow the installation regulations, so as to truly improve the working efficiency of the linear vibrating screen.

What is the reason for the slow feeding of the vibrating screen?

As a commonly used screening equipment in the mining industry, the vibrating screen is in a long-term working state and the operation is also a fine operation, so there will be more or less problems. If the feeding is too slow, it will affect the screening efficiency of the vibrating screen. The reasons for the slow feeding of the vibrating screen and the adjustment methods have been introduced in detail below. Let’s take a look.

The reason why the vibrating screen feeds slowly

High frequency dehydration vibrating screen

1. Vibration motor problem

(1) The motor power cannot reach or the motor power is normal but the speed is slow, and the 1500 rpm that cannot be used will also cause the feeding to be slow.

(2) The steering problem of the vibration motor: the steering of the motor is divided into two types: forward rotation and reverse rotation. Under normal circumstances, the steering of the two motors is in the opposite direction, but if the user connects the positive and negative poles incorrectly when the power is connected, it will cause When the motor rotates in the same direction, there will be a problem of slow or no material feeding on the screen surface.

(3) The problem of the installation position of the motor: There are three installation positions of the vibrating motor of the linear screen, which are the bottom, the two sides, and the upper part. If the vibration motor is installed close to the feeding port, the screen surface material will run for a certain distance and then the speed will decrease and stay on the screen surface.

2. The amount of screen cloth is too large

The excessive amount of cloth on the screen surface is also the reason for the slow feeding of the vibrating screen. When the screen is added, the load of the motor is also added accordingly, and there will be a problem of slow feeding.

Arc vibrating screen

3. The discharge port is higher than the screen surface

If the discharge port is higher than the screen surface, the material cannot be discharged from the discharge port in time, which will cause the material in the screen machine to stagnate on the screen surface and not discharge, thus causing the problem of slow feeding of the linear vibrating screen.

4. Screen box problem

(1) The screen box of the vibrating screen should be installed horizontally on the same horizontal plane. If the horizontal level of the screen box is not balanced, the screen surface will be offset to a certain extent, and the material cannot flow in a straight line;

(2) When the rigidity of the support spring of the screen box is too large, it is easy for the material to be subjected to excessive excitation force, resulting in violent vibration. If the support spring is damaged, it will also cause uneven force on the material and abnormal flow.

Linear vibrating screen

5. Other reasons

Voltage instability will reduce the efficiency of the motor and cause the problem of slow feeding; when the vibrating screen feeds unevenly, the material cannot be subjected to a uniform exciting force, so it will also lead to the phenomenon of slow material flow on the screen surface of the linear vibrating screen; vibration After the screen of the screen is damaged for a long time, the material will not flow normally on the screen surface.

The above are the reasons for the slow feeding of the vibrating screen. The specific reasons are the problem of the vibrating motor, the large amount of cloth on the screen surface, the discharge port is higher than the height of the screen surface, etc. The slow feeding can be adjusted by adjusting the motor and changing the angle of the heavy hammer.

When we find that the vibrating screen equipment has the problem of slow feeding, we must find out the reason in time to better solve the problem. It is also necessary to maintain the equipment on a daily basis, so as to prevent the equipment from malfunctioning.

What is the general slope of the linear vibrating screen?

The slope of the linear vibrating screen refers to the angle between the screen surface and the horizontal direction. This slope is related to the screening efficiency, because only if the slope is appropriate, the screening of the material can be more accurate. If the slope is too large, the material will be on the screen surface. The residence time will be short, although the discharge is easier, but the material is not carefully screened, if the slope is small, the material will stay on the screen surface for a long time, but the output per unit time will be low, so the slope of the linear vibrating screen is still To be within a reasonable range, what is the general slope of the linear vibrating screen?

What is the general slope of the linear vibrating screen

High frequency dehydration vibrating screen

The slope of the linear vibrating screen is generally between 0-15°. If you want to screen special materials, you can increase the slope, but it does not exceed 25°. The material of the linear vibrating screen equipment moves in a straight line on the surface of the screen. Generally, the screen of the linear screen will have a certain inclination angle to promote the flow of the material on the screen. The angle between the screen and the horizontal plane is the slope of the linear vibrating screen. Appropriate slope screening effect is better, not only can the material classification be clear, but also can screen efficiency, but in actual production, the installation slope of the vibrating screen should be adjusted according to the specific properties of the processed materials and the different output requirements, but this The process should also be strictly in accordance with the implementation of the vibrating screen manufacturer.

The slope setting of the linear vibrating screen is related to the material to be screened. The linear vibrating screen is suitable for screening non-viscous dry powders and granules with a moisture content of less than 7%. When the moisture content of the material increases slightly, the linear vibrating screen can adjust the slope appropriately.

The influence of the slope of the linear vibrating screen

Linear vibrating screen

1. Affect the screening efficiency

The slope of the linear vibrating screen will directly affect the efficiency of the vibrating screen. If the slope is too large, the residence time of the material on the screen surface is short, and it is easy to discharge, but it will cause uneven screening of the material and affect the screening fineness.

2. Affect the screening output

The material of the linear vibrating screen equipment moves in a straight line on the surface of the screen. Generally, the screen of the linear screen will have a certain inclination angle to promote the flow of the material on the screen. Under normal circumstances, if the customer does not require the screening fineness and has requirements for the screening output, we can appropriately increase the slope of the linear vibrating screen to increase the jumping speed of the material on the screen surface and promote the material passing rate.

Arc vibrating screen

3. Affect material classification

The slope of the linear vibrating screen will affect the classification of materials. The screening principle of the linear vibrating screen is that the material is forced to move forward in a jumping motion, and the material is moved upward by the parabolic movement of the force driven by the screen machine. If the slope is too small, the jumping height of the material is low, the force of falling on the screen becomes smaller, and the classification of the material is not sufficient. Only the appropriate slope can make the classification of the material clear.

Regarding the question of the general slope of the linear vibrating screen, the above answers have been made. The general slope is between 0 and 15 degrees. If you want to screen special materials, you can increase the slope, but it does not exceed 25 degrees. Only the slope range is suitable and reasonable, which is very beneficial for material screening.

What should I do if the vibrating screen discharges?

In daily production, during the use of the vibrating screen, a relatively obvious material conveying is suddenly not smooth, followed by the problem that the discharge is biased in a certain direction. To solve this problem, we must first find out the reason for the deviation of the material, and then find out how to solve the problem of the deviation of the vibrating screen. In response to the above problems, the vibrating screen manufacturer gave us a detailed introduction.

The reason for the deviation of the vibrating screen

High frequency dehydration vibrating screen

1. The vibrating screen has a long working time

The vibrating screen has a large workload and a long working life. For a large linear vibrating screen, due to its heavy weight, if coupled with repeated vibration and strong inertia for many years, some parts of the body will be loose, which will lead to vibration. The angle of the motor changes, so the phenomenon of discharge deviation occurs.

2. Uneven feeding

If the vibrating screen is feeding more or less, it is easy to cause unstable screening accuracy, and because of the more or less material, the force deviation of the material is large, and there is a problem that the discharge is biased to one side.

3. Exciter installation problem

The transportation and screening of materials by the vibrating screen is pushed by the vibration exciter to the material with a fixed magnitude of excitation force in a designed fixed direction. Therefore, if the material conveying is not good, it can basically be judged as a vibration exciter. There is a problem with the installation angle. Under normal circumstances, the manufacturer will perform precise installation, testing, and adjustment before the equipment leaves the factory to avoid the deviation of the excitation force direction, so this problem is generally not the cause of the new machine.

4. The weight error of the screen body itself is large

The weight error of the vibrating screen body itself is large, and the position of the center of gravity is not accurate. Usually, this kind of problem does not exist in regular manufacturers, but now the market is chaotic, some manufacturers sell inferior imitation vibrating screens at abnormal market prices, although the appearance is the same, but in fact there is no technical content.

Linear vibrating screen

5. Inconsistent damping spring stiffness

The stiffness of the damping spring is inconsistent, and if damaged, it will also cause the vibrating screen to discharge. The importance of the damping spring to the vibrating screen is no less than that of the vibrating motor. If the quality of the shock-absorbing spring does not meet the market requirements, it will inevitably cause a series of production problems.

6. Changes in the position of the spring support

The change of the installation base plane and the position of the spring support will cause the discharge of the vibrating screen to be biased. In addition to the vibration exciter providing the main screening source power to the vibrating screen, the vibration damping spring, bouncing ball, sealing rubber ring, etc., which exist due to shock absorption, also affect the vibrating screen force and the vibrating screen more or less. The level of the body is stable. If a certain part has problems such as aging, it will be caused by the uneven screen surface and the instability of the screen machine, which will cause the problem of deviation of the discharge direction. The problem is greatly reduced, so regular inspection and maintenance are particularly important.

7. Screen box deformation

The screen box refers to the screen above the exciter and below the feeding port, which is composed of the screen frame and the screen surface fixed around it. When the vibrating screen is working normally, especially the large-scale and high-frequency equipment, the screen frame needs both the gravity of the bulk screening material and the strong excitation force of the vibrating motor. If the strength is not enough, it is easy to cause deformation and damage. , The large-scale mining vibrating screen needs to pay special attention to this problem.

The solution to the deviation of the vibrating screen

Arc vibrating screen

1. If the working time of the vibrating screen equipment is too long, the equipment must be maintained regularly.

2. The feeding should be uniform and continuous.

3. Reinstall the exciter and adjust the position of the exciter correctly.

4. Users should shop around and choose carefully.

5. The strength of the screen box requires not only high-quality consumables, but also a unique welding process and additional stable design.

The above is about the reasons for the deviation of the vibrating screen and the corresponding solutions. In fact, it can be seen from the reasons that to solve the problem of the deviation of the discharge, the main thing is the regular maintenance of the vibrating screen equipment, uniform feeding, etc., and at the same time when choosing When selecting equipment, choose high-quality vibrating screen equipment produced by regular manufacturers.

How to use the vibrating screen exciter correctly?

We all know that when some machinery and equipment need to generate excitation force, if the machine itself does not have this function, it needs to add some vibration devices. The vibrating screen needs to use mechanical vibration to screen materials. Therefore, vibration The screen exciter has become one of the important components of the vibrating screen.

When purchasing a vibrating screen exciter, many users generally focus on the quality and performance of the exciter. However, as long as the quality is passed, can the use of the vibrating screen exciter be completely assured? This is not the case. Although the quality of the exciter is the focus of attention, the use of the exciter is correct and reasonable, and it is also an important factor affecting the performance of the vibrating screen. If it is improperly operated for a long time, it is easy to cause the failure of the exciter, thus affecting the normal operation of the vibrating screen. As an old-fashioned vibrating screen exciter manufacturer, Luoyang Haiside Heavy Industry Co., Ltd. shares with you the precautions for the use of vibrating screen exciters, so that more people can learn the correct use of vibrating screen exciters.

The correct use of the vibrating screen exciter is summarized as follows:

1. Before starting the work, check the tightness of all the bolts, and after the initial work for 8 hours, check whether there is looseness and tighten again.

2. Check the oil level in the exciter. If the oil level is too high, the temperature of the exciter will rise or it will be difficult to operate. If the oil level is too low, it will lead to insufficient lubrication and damage to the bearing. Normally, 2/3 of the lubricating cavity should be filled. should.

vibrating screen exciter

3. Ensure a minimum clearance between all moving parts and fixed objects.

4. When the load of the vibrating screen starts, it will cause greater pressure on the bearing of the exciter and reduce the service life. Therefore, it is necessary to check the screen surface of the vibrating screen before opening to ensure that the vibrating screen is started under no load, and then start feeding after the vibrating screen runs smoothly. Before shutting down, the feeding should be stopped first, and the machine should be shut down after the material on the screen surface is drained.

5. During the operation of the vibrating screen, pay attention to whether the exciter is hot or has abnormal noise. If there is abnormal operation, stop it in time to check to avoid accidents.

6. When disassembling the exciter, it needs to be powered off in advance, and should refer to the assembly drawing of the exciter. It should be disassembled with special tools to avoid artificial damage to the parts. After cleaning and testing the parts, if cracks, wear and other problems are found, they should be replaced in time.

Haiside Heavy Industry believes that as long as an old brand exciter that meets the standards of various countries is selected, and the vibration exciter is operated in accordance with the standards during the use of the vibrating screen exciter, the performance of the exciter can basically be guaranteed. The vibrating screen exciters produced by Haiside Heavy Industry have a complete range and excellent quality, and are widely used in a variety of vibrating screens. If you have related needs, you can call us at any time.

What are the vibrating screen models?

In mining operations, vibrating screen is one of the screening equipment that is often used. Nowadays, most of the vibrating screens on the market are linear vibrating screens and circular vibrating screens. These two types of vibrating screens can also be divided into various types according to the screening materials, usage scenarios and output. The output corresponding to the model is basically different. Therefore, the understanding of the vibrating screen model can be directly started from the circular vibrating screen and the linear vibrating screen.

1. Circular vibrating screen

The circular vibrating screen, as the name implies, has a circular running track. Therefore, when the material is screened on the circular vibrating screen, it performs circular motion, which is a new type of multi-layer vibrating screen. Circular vibrating screen is often used in quarries to screen sand and gravel materials due to its fast screening speed, high work efficiency, simple structure, reliable operation and low noise, and of course it can also be used in coal preparation, mineral processing and other industries.

YK series is the most commonly used circular vibrating screen at present. The circular vibrating screen of this series is named according to the number of screen layers and screen size, such as 2YK1548. The motion trajectory is similar to a circle, 15 represents the width of the screen, and 48 represents the length of the screen. Therefore, the meaning of this model refers to a two-layer circular vibrating screen with a screen width of 1500mm and a length of 4800mm. Generally, several layers of sieves can produce several kinds of finished products, and the top layer is the return material.

Linear vibrating screen

The processing capacity of YK series circular vibrating screen is between 12-720m/h. The larger the model number, the wider the screen width and the longer the length, and the higher the vibrating screen output. The mesh size of the screen can be determined according to the feeding size of the screening material.

Commonly used circular vibrating screen models:

2YK1230, 2-layer screen, the screen area is 7.2㎡, and the processing capacity is 12-78m/h;

3YK1230, 3-layer screen, the screen area is 10.8㎡, and the processing capacity is 13-80m/h;

2YK1237, 2-layer screen, the screen area is 8.88㎡, and the processing capacity is 15-86m/h;

3YK1237, 3-layer screen, the screen area is 13.32㎡, and the processing capacity is 16-90m/h;

2YK1548, 2-layer screen, the screen area is 14.4㎡, and the processing capacity is 22.5-162m/h;

3YK1548, 3-layer screen, the screen area is 21.6㎡, and the processing capacity is 22.5-162m/h;

4YK1548, 4-layer screen, the screen area is 28.8㎡, and the processing capacity is 22.5-162m/h.

2. Linear vibrating screen

The characteristics of the linear vibrating screen are high efficiency, simple structure, convenient maintenance, low power consumption, and no dust spillage during operation. It has good screening effect in dry and wet classification and dehydration of medium and fine materials. Therefore, this type of vibrating screen is widely used in light industry, metallurgy, coal and other industries.

When the linear vibrating screen is working, its power source is the vibration of the vibration motor. Under the combined action of the material’s own gravity and the exciting force, the material is thrown up on the screen surface and moves forward in a straight line, and then is screened out through the screen. Various specifications of materials, different specifications of materials, corresponding to different specifications of the discharge port.

The processing capacity of the linear vibrating screen is generally between 10-600t/h, the feeding particle size is not more than 300mm, the screening particle size is relatively fine, and the maximum screening mesh number is 400 mesh, which can screen out 7 kinds of materials with different particle sizes.

High frequency dehydration vibrating screen

Commonly used linear vibrating screen models:

ZSG1237, 1-layer screen surface, the processing capacity is 10-100t/h, and the total weight is 2250kg;

2ZSG1237, 2-layer screen surface, the processing capacity is 10-100t/h, and the total weight is 3345kg;

ZSG1443, 1-layer screen surface, the processing capacity is 10-150t/h, and the total weight is 4100kg;

2ZSG1443, 2-layer screen surface, the processing capacity is 10-150t/h, and the total weight is 4900kg;

3ZSG1443, 3-layer screen surface, the processing capacity is 10-150t/h, and the total weight is 5870kg;

2ZSG1548, 2-layer screen surface, the processing capacity is 15-200t/h, and the total weight is 5836kg;

3ZSG1548, 3-layer screen surface, the processing capacity is 15-200t/h, and the total weight is 6900kg.

The linear vibrating screen is generated by the double motor to generate the exciting force, so that the material is thrown up on the screen and moves forward in a straight line. It is mostly used for small mining or the screening of finer materials. The circular vibrating screen uses an eccentric block as the exciting force (its exciting force is relatively strong), and then performs circular motion, which is suitable for large-scale mining or screening of large materials. Generally, it is used to process materials of about 5mm. Compared with the linear vibrating screen, the efficiency will be higher.

The above content is the relevant introduction of the vibrating screen model. I hope it can be helpful to you. If you need to know more about the vibrating screen, or intend to purchase vibrating screen products, you are welcome to log in to our official website to browse and consult, and look forward to cooperating with you !

How to choose the length and width of the vibrating screen?

When we choose a vibrating screen, we generally pay attention to its model size. If it is used in different industries, the selected model size is also different. For example, if it is used in the mining production industry, then the vibrating screen must be of the heavy-duty type. Relatively speaking, the size of the model is relatively large, and the parameters that determine the size of the vibrating screen to a certain extent are the length and width of the vibrating screen, so how to choose the length and width of the vibrating screen?

Selection of length and width of vibrating screen

Arc vibrating screen

1. Selection of the length of the vibrating screen

The selection of the length of the vibrating screen should be appropriate, because the screening efficiency of the linear vibrating screen is directly related to the length of the linear vibrating screen. If the length is too long, the screened materials will not be able to quickly leave the screen surface and affect the linear vibration. Screening effect. If the length is too short, the residence time of the material on the screen surface is too short, and it cannot be sufficiently screened. It is also unreasonable to increase the screening efficiency by using a longer screen surface to increase the screening time, so the length of the screen surface must be selected appropriately.

2. Selection of the width of the vibrating screen

At present, the width of the vibrating screen is at most 3.6m, and the width of the screen surface of the light-duty linear vibrating screen cannot exceed 1.5m. If the screen surface is too wide, it is difficult to ensure the uniformity of the material on the screen surface. In order to ensure the ability of the linear vibrating screen screening equipment, the material on the screen surface of the linear vibrating screen needs to have a certain thickness. When the thickness of the material on the screen surface reaches a certain level, the amount of the screen surface passing through it mainly depends on the linear vibrating screen. width. Therefore, the larger the production capacity, the wider the screen surface needs to be, but the width of the linear vibrating screen also has a certain limit.

The influence of the length and width of the vibrating screen

High frequency dehydration vibrating screen

1. Length affects the screening efficiency

As mentioned above, the length of the screen surface of the vibrating screen directly affects the screening efficiency of the screen machine, because the length of the screen surface affects the residence time of the screened material on the screen surface. The sieving test shows that when the sieving time is slightly increased, there are many particles smaller than the sieve hole, which pass through the sieve hole and pass through the sieve, so the sieving efficiency increases rapidly. However, as the sieving time increases, the easy-to-screen particles on the screen surface become less and less, and most of the remaining particles are difficult-to-screen particles, that is, the particle size of the material is close to the size of the sieve hole. It takes a long time to sieve these difficult-to-screen particles, and the increase of sieving efficiency is getting slower and slower. Therefore, the length of the screen surface is only within a certain range, which plays a role in improving the screening efficiency. The length of the screen surface cannot be excessively lengthened, otherwise the structure of the screening machine will be cumbersome and the expected effect will not be achieved.

2. Width affects processing power

The width of the vibrating screen determines the processing capacity. The width of the vibrating screen is not only affected by the processing capacity of the screening machine, but also by the structural strength of the screening machine. The larger the width, the larger the size of the vibrating screen, the more and more difficult the problem needs to be solved in the structural strength of the screening machine, so the width of the screen surface cannot be increased arbitrarily.

Linear vibrating screen

Relationship between length and width of vibrating screen

The relationship between the length and width of the vibrating screen is a mutual restriction and mutual influence. The length and width of the screen surface of the mining vibrating screen should maintain a certain proportional relationship, usually 2.5:1-3:1. Generally speaking, after the thickness of the material is given, the width of the screen surface of the mining vibrating screen affects the productivity of the screening machine, but the length of the screen surface directly affects the sorting efficiency of the screening machine, so the selection of the two should also be combined. In order to choose the parameters suitable for your own production conditions, that is to say, the length and width of the screen surface of the vibrating screen can be determined according to the comprehensive indicators of productivity and screening efficiency required by the use site.

The above is an introduction to how to choose the length and width of the vibrating screen. In general, the width should be at most 3.6m, and the length should be appropriately selected. The length and width affect the screening efficiency and processing capacity of the vibrating screen respectively, and there is a relationship between the two that restricts and affects each other, so the selection should be based on the specific working conditions. If you need high-quality mining vibrating screen, please contact Hiside for details~

What are the lubrication methods of vibrating screen?

In the mine production site, vibrating screen is a common equipment, which needs to screen and dehydrate materials. Since it is a large-scale equipment and the workload of the equipment is large, the maintenance work of the vibrating screen should be done well at ordinary times, and the lubrication and maintenance can ensure the normal production and operation of the vibrating screen. So what kind of lubrication is used for the vibrating screen? Generally, there are two types of lubrication, oil lubrication and grease lubrication. The following editors from Hiside will give you a detailed introduction.

1. Lubrication method of vibrating screen

Oil lubrication of vibrating screen

Lubricating oil has strong fluidity and dispersibility, so the oil-lubricated seal needs to be safe and reliable. The sealing device is more complicated than grease lubrication, and it is more difficult to disassemble and maintain. Oil lubrication is generally suitable for bearings operating at high speeds or in environments with high bearing temperatures. Commonly used oil lubrication methods include oil bath lubrication, circulating oil lubrication, drip oil lubrication, oil injection lubrication, and oil and gas lubrication.

Grease lubrication of vibrating screen

Grease has the characteristics of strong adhesion, not easy to run off, and good pressure resistance. Due to the weak fluidity of the grease, the grease lubricated sealing device is relatively simple, the disassembly and maintenance are more convenient, and a special oil supply system is not required. Grease lubrication is generally suitable for work in low and medium speed and moderate temperature environments. Commonly used greases are calcium-based grease, sodium-based grease, aluminum-based grease, general-purpose lithium-based grease, extreme-pressure lithium-based grease and molybdenum disulfide extreme-pressure lithium-based grease.

Banana screen

2. Characteristics of vibrating screen lubrication method

Characteristics of oil lubrication of vibrating screen

Name Features and uses
Oil bath lubrication The rotation of the bearing itself is used to drive the lubricating oil to lubricate the bearing, and the lubricated lubricating oil flows back to the oil tank: but this lubrication needs to control the oil amount. In general, the upper height of the lubricating oil is slightly lower than the center line of the bearing: too much oil , The increase of bearing resistance causes the bearing to heat up, the oil amount is too small, and the lubrication effect is not achieved, thereby reducing the bearing service life: it is mainly used in bearings with low and medium speeds, and has a wide range of applications.
Circulating oil lubrication The oil inlet and outlet are provided on the seat. When the bearing is running, the oil pump is used to pump the lubricating oil from the oil inlet to the bearing, and the oil flowing out of the oil outlet is filtered and cooled. This method not only lubricates the bearing It also plays a role in cooling and cooling; it is generally used in bearings with high speed.
Drip lubrication The lubricating oil is dripped onto the friction pair by its own weight, generally 3-8 seconds a drop is appropriate, because too much oil will cause the bearing temperature to increase; this lubrication is mostly used for gears, racks and other frictions that are small in number and easy to approach On the pair and bearing parts that require a quantitative supply of lubricating oil.
Oil injection lubrication The high-pressure injection method is used to spray lubricating oil from one end of the bearing into the bearing to lubricate it, and the lubricated oil flows into the oil tank from the other end; this method can effectively lubricate the bearing, but the position of the high-pressure nozzle and the injection speed have certain It is required that the high-pressure nozzle is located between the inner ring and the cage, the injection speed is greater than 15 meters per second, and the lubricating oil is directly injected into the bearing; this lubrication is suitable for high-speed running bearings with medium and low loads.
Oil-air lubrication The compressed air is mixed with a little lubricating oil to form oil mist and sprayed into the bearing in the working state; this method also plays a role in cooling and cooling while lubricating the bearing. Compared with other lubrication methods, it can make it run at a lower temperature and allow the bearing speed to reach up. This lubrication is suitable for bearings under high speed, high temperature and heavy load work.

Characteristics of grease lubrication of vibrating screen

Name Features and uses
Calcium based grease Good water resistance, poor heat resistance. The operating temperature is less than 60 degrees, and the shear resistance is poor under high-speed conditions. It is suitable for low temperature, medium and low load, medium and low speed humid environment or lubricating places in contact with water, and the price is low.
Sodium Grease Poor water resistance, average heat resistance and rust resistance, suitable for lubricating low-speed, medium-load mechanical equipment in the temperature range of -10 to 100 degrees, not suitable for lubricating parts in contact with water, and the price is low.
Aluminum base grease It has high water resistance and poor heat resistance, and the operating temperature is less than 50 degrees. It is suitable for corrosion protection of metal surfaces and friction parts of shipping machines under medium and high loads and low speeds. The price is low.
General Purpose Lithium Grease It has good water resistance, heat resistance, mechanical stability, corrosion resistance and oxidation stability. It is suitable for the lubrication of rolling bearings and sliding bearings and other friction parts of various mechanical equipment within the working temperature range of -20 to 120 degrees. It is mostly used under medium and high load and medium and low speed. fair price.
Lithium grease It has good heat resistance, water resistance, rust resistance, and extreme pressure performance. It is suitable for high-load, medium-speed mechanical equipment bearings and gear lubrication at a working temperature of -20 to 120 degrees. It can also be used in centralized lubrication systems. Moderate.
Lithium Molybdenum Disulfide Grease It is suitable for the lubrication of heavy-duty gears and bearings such as internal rolling steel machinery, mining machinery, and heavy lifting machinery with a working temperature of -10 to 120 degrees.

High frequency dehydration vibrating screen

3. Comparison of vibrating screen lubrication methods

Compare items oil lubrication Grease lubrication
Sealing means More complicated, need to pay attention to maintenance Simple
Lubrication performance very good  good
Rotating speed Also available for high speed low speed medium speed
torque smaller bigger
Lubricant replacement Simple more troublesome
Lubricant life long shorter
cooling effect Good (requires loop) none
Filtration of impurities easy difficulty
leakage of lubricant Not suitable for places where oil leakage is not allowed Less oil spill pollution

4. Precautions for vibrating screen lubrication

(1) After the vibrating screen is delivered to the site, it should be refueled every four hours after starting up. The vibration exciter bearing is lubricated, and the bearing is made of lubricating grease, which should not be mixed with other varieties. When replacing new grease, the original grease should be cleaned.​​

(2) After starting production, add oil every 24 hours, 60-80g oil each time; also add grease according to the actual situation to ensure that the screen bearing works under the condition of sufficient grease.​​

(3) The initial oil filling of the bearing is 1/3-2/3 of the bearing space, and it should not be too much to prevent the bearing from heating. Use a high-pressure oil gun or oil pump to inject oil through the pipe joint.​​

(4) Remove the bearing and clean it every six months.​​

(5) All lubrication points and oil seals must not have oil leakage.

The above is the answer to what kind of lubrication is used for the vibrating screen. In order to make the bearing function fully, it is necessary to adopt appropriate lubrication methods and lubricants according to the influencing factors of the use environment, in order to achieve good lubrication protection effect. Lubrication affects the working state of the vibrating screen equipment to a large extent, so it is very important to do the lubrication and maintenance work for each part of the vibrating screen.