How to increase the output speed of the vibrating screen?

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Linear vibrating screen is referred to as linear screen for short. It has many characteristics such as large screening output, high screening precision, good dustproof effect, simple structure and easy operation. It is widely used in many industries such as food, metallurgy, mining, chemical industry, medicine, agriculture, etc. . Some customers hope to speed up the discharge speed of the equipment during use, so as to increase the screening output. If you want to increase the discharge speed of the linear vibrating screen, there are three main methods that can be used, let’s take a look together below.

1. Increase the vibration motor model

The first and common one is to increase the model of the vibration motor. By increasing the model of the vibration motor, the excitation force of the vibration motor can be increased to speed up the movement of materials. Increasing the excitation force of the vibration motor can speed up the discharge speed. The screen body will be overloaded for a long time, which will affect the overall service life of the screen machine. Moreover, because the linear vibrating screen uses dual vibration motors as the excitation source, it cannot guarantee 100% synchronous operation of the two motors. This will not only affect the long-term operation. In the service life of the screen, there will be problems such as steel plate tearing and material deviation.

2. Increase the tilt angle

Banana screen
The second is to increase the inclination angle of the linear vibrating screen during the production process, usually the inclination angle can reach 7-10 degrees, which can increase the output and the discharge speed to a certain extent, but usually adopts a steel grid structure , The net frame is a steel structure as a whole, which is large in itself, and it is very inconvenient to change the net in the fragile net industry such as quartz sand or stones.

3. Increase the feed opening of the screen frame

The third is to heighten the inlet of the screen frame as a whole. Increasing the inlet of the screen frame will indeed increase the discharge speed, but this will increase the height of the equipment as a whole. The height of the screen frame is fixed. If other types are produced The materials need to be purchased separately, which will greatly increase the cost of purchasing equipment.

What are the differences between linear vibrating screen and circular vibrating screen?

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In the field of mining crushing,vibrating screens are widely used.Common types include linear vibrating screens and circular vibrating screens.There is no essential difference in the style and structure of the two.The materials are screened through the vibration of the screen surface.,What are the differences between the linear vibrating screen and the circular vibrating screen?

The working principle of vibrating screen

1.Linear vibrating screen

Vibration motor is used as the source of vibration,so that the material is thrown up on the screen while moving forward in a straight line.The material enters the inlet of the screening machine evenly from the feeder,and produces several kinds of screens through the multi-layer screen.The upper material and the lower material are discharged from their respective outlets.

2.Circular vibrating screen

The motor drives the eccentric block of the vibration exciter through the V-belt to rotate at a high speed,which produces a large centrifugal inertial force,which stimulates the screen box to produce a circular motion with a certain amplitude.The material on the screen is affected by the impulse transmitted by the screen box on the inclined screen surface.A continuous throwing motion is produced,and the particles smaller than the sieve hole are passed through the sieve when the material meets the screen surface,thereby achieving classification.

The differences between linear vibrating screen and circular vibrating screen

1.Movement track:the material on the linear vibrating screen moves forward in a straight line;the material on the circular vibrating screen moves in a circular motion.

2.Vibration exciter:The exciter of the linear vibrating screen is composed of two shafts,and it works by the principle of vibration motor excitation,so it is also called a double-shaft vibrating screen;because the exciter is a shaft,the circular vibrating screen uses The inertial motor works,so it is also called a single-axis vibrating screen.

3.Hole blocking:the material of the circular vibrating screen moves in a parabolic circular trajectory on the screen surface,so that the material is dispersed as much as possible,thereby improving the material’s bounce force,and the material stuck in the screen hole can also jump out,more than a straight line.The probability of the vibrating screen being blocked is small.

4.Installation arrangement:Due to the small inclination of the screen surface of the linear vibrating screen,the height of the screen is reduced,which is convenient for process layout.

5.Screen surface inclination:Generally speaking,the inclination angle of the screen surface of the linear vibrating screen in production is small;but according to the particle size of the material,the circular vibrating screen can change the inclination angle of the screen surface,thereby changing the moving speed of the material along the screen surface.Improve the processing capacity of the sieve machine.High frequency dehydration vibrating screen

6.Material:Under normal circumstances,the materials used in the production of linear vibrating screens are mainly light plates or stainless steel plates;while the circular vibrating screens are made of thicker plates,and the box body is made of manganese steel to resist the screening process.The impact of the material.

7.Applicable fields:Linear vibrating screen mainly screens fine particles,light specific gravity,and low hardness materials,mainly dry powder,fine granular or micro powder materials,usually in the food,chemical,building materials,and pharmaceutical industries.Wide;the circular vibrating screen mainly screens materials with high specific gravity,large particles and high hardness.It is widely used in mines,coal,quarries and other mining industries.

8.Processing capacity:For the circular vibrating screen,since the exciter is arranged above the center of gravity of the screen box,the elliptical long axis at both ends of the screen box is in a lower eight shape,and the upper end of the elliptical long axis at the feeding end faces the discharge The direction is conducive to the rapid spread of the material,and the upper end of the elliptical long axis of the discharge end is opposite to the discharge direction,which reduces the movement speed of the material,which is conducive to the penetration of the difficult-to-screen material,and the arc-shaped screen surface increases the screen size.Effective area,so the processing capacity is stronger than linear vibrating screen.In addition,for materials that are difficult to screen,the circular vibrating screen can turn the main shaft,so that the direction of vibration is opposite to the direction of material movement,and the speed of the material moving along the screen surface is reduced(when the inclination angle of the screen surface is the same as the rotation speed of the main shaft)to increase the screen.Sub-efficiency.

9.Environmental protection:The linear vibrating screen can adopt a fully enclosed structure without dust spillage,which is more conducive to environmental protection.

In the field of mining crushing,circular vibrating screens are widely used,but in actual production,the choice of circular vibrating screen or linear vibrating screen mainly depends on the type of material handled by the user and the application field.The purpose of screening is different,and the equipment selected is also Will be different.

What are the materials of the vibrating screen? Which material is better?

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In the sand and gravel production line, the vibrating screen is the basic equipment configuration, which is mainly used to screen and classify the crushed materials and finished sand and gravel. The screen is a key component of the yield and service life of the vibrating screen. So what are the materials of the vibrating screen?Which screen material is better? The following is a specific introduction to the commonly used screen materials of the vibrating screen.

Material of vibrating screen

1. Polyurethane rubber screen

Polyurethane has low stress performance and relatively large toughness. In order to resist the damage to the screen caused by the fall of sand and gravel from the belt conveyor, there are requirements for the diameter and thickness of the screen ribs. You cannot choose too thin or too thin. In the condition of the size of the vibrating screen, it is unavoidable to reduce the opening rate of the screen. This will reduce the penetration rate of the screen. Among the four screens, the penetration rate of the polyurethane screen is lower.

2. Reinforced screen

Reinforced screens have greater stress performance, strong resistance to impacts of sand and gravel materials, and the surface of the steel bars is smooth and flat, which can reduce the barrier to moving sand and gravel materials. It can also have good openings under the condition of the stress performance of the screen. Therefore, the penetration rate of the screen can be greatly improved.

Arc vibrating screen

3. Steel plate screen

Due to its own factors in the use of this kind of screen, the circular openings are often used. Because the holes are directly opened on the steel plate, the entire screen surface is smooth during use, which is convenient for the sliding of sand and gravel materials. However, because the shape of the opening is circular, the sand and gravel are mostly irregular polygons, and the probability of blocking the circular hole is greater than that of the square opening.

4. Square steel screen

The square steel screen has better stress performance, which is greater than that of the polyurethane screen. The square steel screen does not have the shortcomings of the polyurethane screen, and the opening rate and the penetration rate of the screen may be obtained.

Comparison of vibrating screen mesh material

1. Polyurethane screen has good toughness and strong wear resistance, but in actual use, it is understood that its use time is not very ideal. Through observation, it is because the sand and gravel fall from the belt conveyor to the screen during use. There has been a strong impact, which makes the screen ribs of the polyurethane screen easier to break, but perhaps the impact of sand and gravel on the screen can be reduced by modifying the blanking method, thereby increasing the use time of the screen.

2. Due to the use of 16Mn material, the wear resistance of the steel plate screen will be improved, but in the process of use, for the opening rate, the connecting plate between the holes will be thinner, so its resistance The impact is not good, and it will affect the end use time of the steel plate screen.

In addition, the steel plate screen requires frequent fastening of the connecting screws between the screen and the screen support body during use, otherwise relative movement between the steel plate screen and the screen support body will occur, which will greatly reduce its use time.

3. There is not much difference between the reinforced screen and the square steel screen in terms of stress performance and toughness. Therefore, the difference in the impact resistance of the two against sand and gravel is not very large. However, due to the different material choices of the two, they are In terms of performance, the square steel screen is better than the steel screen.

4. The characteristics of the steel screen mesh of square steel than round steel is that the screen mesh is made of square steel and steel under the same diameter condition, and the wearable surface of square steel is larger than that of steel.

In summary, the materials of the vibrating screen are polyurethane rubber screen, steel screen, steel screen and square steel screen. Through the comparison of these materials, it can be found that screens of different materials have their own advantages and disadvantages. When choosing, you can choose according to your own use and needs.

What are the components of the vibrating screen?

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Vibrating screen is a very important material screening equipment in the mining industry.The material can be divided into multiple different levels through a single-layer or multi-layer screen with evenly distributed holes,so as to facilitate the use of subsequent processes.What are the components?The following vibrating screen manufacturer will give you a detailed answer.

The composition of the vibrating screen

1.Vibrator

There are generally two types of vibrators for single-shaft vibrating screens and dual-shaft vibrating screens according to the way of eccentric reconfiguration.The block eccentric type is better for the configuration of the eccentric weight.

2.Screen box

The screen box is composed of a screen frame,a screen surface and a pressing device.The screen frame is composed of side plates and beams.The screen frame must be sufficiently rigid.

3.Supporting device

The supporting device of the vibrating screen has two types:hanging type and seat type.The seat type installation is relatively simple,and the installation height is low,generally should be preferred.The supporting device of the vibrating screen is mainly composed of elastic elements.Commonly used are coil springs,plate springs and rubber springs.

4.Transmission

The vibrating screen usually adopts a V-belt transmission device.The structure of the vibrating screen is simple,and the number of revolutions of the vibrator can be selected arbitrarily,but the belt is easy to slip during operation,which may cause the screen hole to be blocked.Vibrating screens are also directly driven by couplings.The coupling can maintain a stable number of revolutions of the vibrator and has a long service life,but it is difficult to adjust the number of revolutions of the vibrator.High frequency dehydration vibrating screen

Screening process of vibrating screen

The actual screening process is:after a large number of broken materials with different particle sizes and mixed thicknesses enter the screen surface,only a part of the particles contact the screen surface.Due to the vibration of the screen box,the material layer on the screen is loosened,so that large particles exist.The gap is further enlarged,and small particles take the opportunity to pass through the gap and transfer to the lower layer or conveyor.Because the gap between small particles is small and large particles cannot pass through,the original disorderly arrangement of particle groups separates,that is,they are layered according to particle size,forming an arrangement rule with small particles on the bottom and coarse particles on the top.The fine particles that reach the sieve surface can pass through the sieve of those smaller than the sieve hole,and finally realize the separation of coarse and fine particles and complete the screening process.

However,there is no sufficient separation.During sieving,there is generally a part of the under-sieve remaining in the over-sieve.When fine particles are sieved through the sieve,although the particles are smaller than the sieve openings,they have different degrees of difficulty in passing through the sieve.It is more difficult for materials and particles with similar sieve openings to penetrate the sieve,and even more difficult to penetrate the gap between the particles in the lower layer of the screen.

How to replace the vibrating screen bearing? Detailed disassembly steps

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Mine vibrating screens are a powerful partner for crushing equipment in the beneficiation industry, and their bearings are generally heavy-duty bearings in order to carry a certain axial load. In daily work, the bearings that have been used for a certain period of time need to be replaced, so how to replace the bearings of the mine vibrating screen? I will share with you here.

Disassemble the bearing

1. Remove the protective covers at both ends and record the percentage value of the excitation force when the eccentric block is working, so that it can be restored to the original working state during installation;
2. Remove the shafts at the two shaft ends with retaining rings;
3. Loosen the fastening bolts of the outer eccentric block, remove the outer eccentric block, and remove the shaft key if there is a shaft key. Loosen the fastening bolts of the inner eccentric block and remove the inner eccentric block;
4. Remove the bearing seat compression bolts, screw into the bearing seat removal screw holes with appropriate bolts, and eject the bearing seat from the housing;
5. Remove the bearing gland from the bearing seat, press out the bearing from the bearing seat or eject it with a suitable bolt;
6. If the bearing is a cylindrical roller bearing with a separable inner and outer sleeve, remove the inner sleeve of the bearing from the shaft and put it into the original bearing outer sleeve;
7. Clean the greasy dirt of various parts.

Arc vibrating screen

Install the bearing

When replacing a new bearing for a mine vibrating screen, the same bearing as the original model must be used.

1. Wash the bearing with kerosene, press it into the bearing seat, fill the ball of the outer ring of the bearing with No. 3 lithium base grease to two-thirds full, apply it evenly with clean hands, install the bearing gland, and use coated bolts to prevent loosening Glue fastening bolts compress the bearing gland;
2. The bearing is a cylindrical roller bearing with a separable inner and outer sleeve. The inner sleeve of the bearing should be placed on the shaft and in place;
3. Install the bearing seat on the casing. If there is a grease filling hole, it must be aligned with the position. Tighten the bearing seat with fastening bolts coated with bolt anti-loosening glue;
4. Install the inner and outer eccentric block on the rotating shaft and place it in place. If there is a shaft key, install the shaft key in the keyway and then install the outer eccentric block, and install the shaft retaining ring on the rotating shaft;
5. Tighten the fastening bolts of the eccentric block, turn the adjustable eccentric block to the angular position before removal and tighten the fastening bolts. After the above assembly is completed, the shaft should have a certain axial series movement;
6. Put on the protective covers at both ends and fasten them with screws.

Installation method of vibrating screen filter and matters needing attention

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In many production industries,vibrating screens are very efficient material screening equipment,but in the process of long-term use,it is inevitable that the screen will wear out,so it needs to be replaced and reinstalled.Here is the sorting out for everyone:The installation method and precautions of the vibrating screen filter,I hope it can be helpful to everyone.

Installation method of vibrating screen filter

1.Remove the net frame of the processing machinery,put the net face down,put it in the PU ring,and bounce the ball;

2.Install the sealing tape evenly around the vibrating screen of the processing machinery;

3.Install the screen assembly and place it flat on the bottom frame of the vibrating screen of the processing machine;

4.Spread the fine mesh evenly on the vibrating screen;

5.Remove the middle frame,press down the screen gently and evenly,and the discharge port of the screen frame of the processing machine can be placed in the circumferential direction as needed;

6.Gently pull up the screen around the vibrating screen,remove the excess part,buckle the ring,and use an open-end wrench with both ends to lock the copper nuts evenly.During the locking process,use the random rubber hammer to beat the beam evenly around.Ring,and then tighten.

Installation Precautions

1.Since the tension of the screen will directly affect the screening efficiency of the screen,the screen must be tensioned when installing the screen;

2.It is necessary to determine the installation of clear rubber balls according to the number of meshes of the materials to be screened and the difficulty of screening,and avoid blindly installing them;

3.When the mesh number of the screen is high or the proportion of the material is relatively large,a supporting mesh with a suitable mesh size should be installed under the screen(the supporting mesh mainly plays a supporting role,which can effectively reduce the pressure of the material on the screen and extend the screen.Service life);

4.In order to avoid the phenomenon of mixing,the screen frame must be assembled to the screen box as required,and the grown screen should be extended into the corresponding outlet;

5.When installing the pressure plate,pay attention to maintaining the flatness of the pressure plate,and line it with a sponge sealing tape with strong flexibility to evenly lock it.This is the key to preventing the occurrence of mixing,and it is also an important factor affecting the life of the screen;

6.After the vibrating screen is installed as required,a small amount of material must be used to test the distribution and screening of the screen.The material is uniformly transported forward,the classification is accurate,and there is no mixing phenomenon,then the screen can be put into use.On the contrary,if the unevenness of material deviation,accumulation,etc.occurs,the flatness and uniformity of the screen surface of the screen should be adjusted.If mixing of materials occurs,check the sealing of the screen and whether it is tight.

The above are the installation methods and precautions of the vibrating screen filter,for your reference only.If you need to replace it,it is recommended to find a professional maintenance personnel to operate it to avoid accidents.

What is the influence of the angle on the vibrating screen

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Vibrating screen is a kind of screening equipment, usually used for impurity removal, filtration and classification in mining, metallurgy and other industries. When purchasing vibrating screen equipment, the manufacturer will according to the customer’s screening requirements, such as output, discharge type and screen. It is recommended that you use specific conditions, such as the purpose of the project, but in actual production operations, the processing capacity of the vibrating screen will be affected by the moisture content of the material and the production environment. By adjusting the angle of the vibrating screen, we can objectively control the processing capacity of the equipment. We often say that the angle of the vibrating screen can be divided into two types, one is the installation angle of the vibrating screen vibration motor, and the other is the screen surface angle of the vibrating screen equipment. Changes in these two angles will directly affect the output of the vibrating screen.

 

The influence of angle on the output of vibrating screen

1. The vibrating motor angle of the vibrating screen
The vibrating motor is the source of the vibrating force of the vibrating screen. The vibration motor drives two sets of vibration exciters installed on the screen frame to generate vibration through the flexible coupling. The vibration motor has an eccentric weight on the upper and lower sides of the vibration motor, also called an eccentric mass, and the shielding effect is basically achieved by the vibration motor. Adjust the eccentric blocks at the upper and lower ends. By adjusting the number of upper and lower eccentric blocks, the horizontal vibration amplitude and the vertical vibration amplitude of the screen surface can be controlled, thereby controlling the exciting force. The angle between the upper and lower eccentric blocks of the vibrating screen is what we often call the vibrating motor angle. By adjusting the angle of the vibrating screen motor, the running track of the screening material in the vibrating screen can be adjusted. Usually, the material is inside the vibrating screen. Speed ​​of operation and propagation. After the material enters the material inlet from the vibrating screen, it will fall onto the screen and then spread to the surrounding area. The diffusion will gradually complete the screening process. The smaller the angle of the vibration motor, the faster the material will diffuse to the surrounding area. If you want to screen the material in the vibrating screen for a period of time to improve the screening accuracy and further improve the screening effect, you can achieve this by lowering the angle of the vibrating screen a bit.

Banana screen

2. The inclination angle of the screen surface of the vibrating screen
The angle between the screen surface of the vibrating screen and the horizontal direction is called the inclination angle of the vibrating screen. The influence of the inclination angle of the screen surface on the screen hole size is relatively easy to understand. The inclination of the screen surface is large, and the time for the material to stay on the screen surface is short, so it is easy to discharge the screen material, and the processing capacity per unit time is large, but the speed of the screen is very high. The layer of material moving forward on the screen surface is fast, reducing the chance of particle penetration and reducing the efficiency of screening, which means that it is not easy to screen and clean. On the contrary, the smaller the inclination angle of the vibrating screen, the longer the material stays on the surface of the screen. Although the processing volume becomes smaller, the material has more chances to pass through the sieve, so the sieving consumption will increase. In the actual production process, we can control the tilt angle of the screen surface according to the specific characteristics of the material. Generally, the angle of the screen surface is about 15-25°. For high-viscosity or other materials that are not easy to screen, we can appropriately reduce the screen inclination angle of the vibrating screen to improve the screening accuracy.

 

Vibrating screen installation angle requirements

1. Generally speaking, without any special circumstances, the angle between the eccentric blocks of the vibration motor of the vibration screening machine is 45° when it leaves the factory.

2. The material of the linear vibrating screen machine moves linearly on the appearance of the screen. The skewness that the linear screen machine will have is based on the flow of stones in the screen. The angle between the screen and the degree surface is usually less than 15°, and the material can be processed. Screen and add skewness, but it should not exceed 25°. Linear screen machinery also needs to keep the bracket on the ground, so as not to stop moving during operation.

3. The skew angle of the discharge end of the dewatering vibrating screen is 5-10°.

Whether it is the adjustment of the vibrating motor angle of the vibrating screen or the adjustment of the inclination angle of the vibrating screen, it should be within a small range. Line control, so as not to damage the main components such as the motor. In the process of using the vibrating screen, installation and adjustment should be carried out in strict accordance with the manufacturer’s instructions, and attention should be paid to maintenance and maintenance during the operation, so that it can better use the vibrating screen.

How to adjust the vibration screen amplitude is insufficient?

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Vibrating screen is a kind of material screening equipment commonly used in the mining industry.It mainly uses the vibration of the multi-layer screen to make the material particles fall into the hopper,and then screen out materials of different particle sizes,but if the amplitude of the screen is not enough,it will Affecting the screening efficiency,how to adjust the amplitude of the ANA vibrating screen?Here is a summary of the impact of vibrating screen amplitude on screening efficiency,as well as methods to increase the amplitude,for your reference.

The influence of amplitude on the efficiency of vibrating screen

Generally,the larger the vibrating screen model,the larger the selected amplitude.Because the greater the amplitude of the vibrating screen,the less the blockage of the screen holes will be,which is more conducive to the screening and stratification of the ore,and better screening production capacity is obtained.

But it should be noted that if the amplitude of the vibrating screen is too large,the strong vibration will cause greater damage to the vibrating screen itself.The choice of vibrating screen amplitude is usually determined by the particle size and properties of the ore.When the ore particles are small,moist and still have a certain viscosity,low frequency and large amplitude are required.

In addition,the corresponding amplitude and frequency should be selected for different screening operation stages.For example,pre-selection screening operations generally use low frequency and large amplitude,while dehydration and de-intermediation operations use high frequency and small amplitude.

High frequency dehydration vibrating screen

Method of adjusting the amplitude of vibrating screen

1.If the vibration source is a vibration exciter,you can increase(decrease)the weight of the eccentric block(increase or decrease the secondary eccentricity).

2.If it is a vibrating motor,the amplitude adjustment depends on the angle between the eccentric blocks at both ends of the motor shaft to change the size of the exciting force.If the angle is small,the exciting force becomes larger,and the amplitude becomes larger;otherwise,the angle becomes larger and the vibration is excited.The force becomes smaller and the amplitude becomes smaller.

3.For the shaft eccentric vibrator,the counterweight on the flywheel and belt wheel can be increased or decreased to increase or decrease the amplitude of the vibrating screen.

It should be noted that the adjustment amount of the vibration source(vibrator or vibration motor)on the vibrating screen must be the same,otherwise the vibrating screen will be damaged.

In production,the screening efficiency of the vibrating screen is related to many factors,such as material properties,equipment structure and various performance parameters.Aside from the rigid factors of material properties and equipment structure,the parameters of amplitude,vibration frequency,vibration direction angle,screen tilt angle and ejection angle have a great impact on the production efficiency of the vibrating screen.During installation and commissioning Pay more attention to the adjustment of these parameters.

Seven reasons for the material deviation of the linear vibrating screen

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The linear vibrating screen uses a vibrating motor as the source of vibration, so that the material is thrown up on the screen and moves forward in a straight line at the same time.
The material enters the feed inlet of the screening machine evenly from the feeder, and passes through the multi-layer screen to produce several specifications of oversieve and undersieve.
Don’t exclude them from their respective outlets. During the operation of the linear screen, the material does not move in an arc-throwing straight motion and deviates to both sides of the box. This is the phenomenon of material deviation. So what are the reasons for the material deviation of the linear vibrating screen? Let’s take a look together!

1. Improper installation of vibration motor

Because the linear vibrating screen is used to transport and screen the material through the vibration source body, that is, the vibrating motor gives the material a designed and fixed direction and a fixed magnitude of excitation force. Therefore, when there is a poor conveying situation, basically It can be judged that there is a problem with the installation angle of the vibration motor.

2. The equipment runs for a long time

The equipment has a heavy workload and long running time. Whether it is a human or a device, there is a certain limit to the amount of work that can be undertaken every day. People who work for a long time will become tired or even sick, and the equipment will also fail. Compared with the large linear vibrating screen, due to its heavier weight, if coupled with the long-term large-scale screening work, some parts of the machine body will become loose due to this long-term repeated vibration and strong inertia. , Which may cause the angle of the vibration motor to change, and the phenomenon of material deviation.

3. Not evenly feeding as required

The requirement repeatedly mentioned in the manual of the linear vibrating screen is: uniform feeding. Because if the material is fed suddenly, it is easy to cause unstable screening accuracy, and due to the amount of material, the deviation of the force of the material is large, and the problem of the material being discharged to one side occurs.

4. Uneven excitation force

The uneven excitation force on both sides of the linear vibrating screen leads to deviation caused by the different amplitudes on both sides. Adjusting the eccentric weight of the two vibration motors to the same angle can basically solve this problem.

5. The sieve body parts are aging and loose

Linear Vibrating Screen
In addition to the vibrating motor that provides the main source of power for the linear vibrating screen, the linear vibrating screen shock absorber exists due to shock absorption
Springs, bouncing balls, sealing rubber rings, etc. more or less also affect the vibrating force and the horizontal stability of the linear vibrating screen body. If a certain component has problems such as aging, the linear vibrating screen surface is not flat, the screen machine is unstable, etc., which will cause the problem of the deviation of the discharge direction. In severe cases, there will be sudden abnormal noises and serious wear of the linear vibrating screen. The service life will be greatly reduced. And other issues. Therefore, it is necessary to carry out regular inspection and maintenance of the equipment, and the materials of the parts are also very important.

6. The position of the center of gravity is unstable

The unsteady position of the center of gravity of the linear screen itself or the unbalanced position of the eccentric block of the motor is also one of the reasons that cause the material of the linear vibrating screen to deviate.

7. Different materials for damping spring

It is also an old-fashioned quality problem. The damping spring is no less important to the linear vibrating screen than the vibrating motor. It plays a pivotal role in maintaining the stability of the linear vibrating screen and extending the life of the linear vibrating screen. Many prices are much lower than Manufacturers with normal sales prices rely on cutting corners for accessories and consumables to attract customers, causing some customers to suffer heavy losses.

8. Deformation of the screen box

The screen box refers to the screen above the vibrating motor and below the feeding port, which is composed of a screen frame and a fixed screen surface around it. Under normal operation of the linear vibrating screen, especially the large and high-frequency linear vibrating screen, the screen frame needs the strong excitation force from the gravity of the mass screening material and the vibrating motor at the same time. If the strength is not enough, it is easy to deform, The problem of damage. The strength of the screen box mainly depends on the manufacturer’s material selection, welding process, and additional stable design.

In the case of material deviation in production, you can check one by one according to the above 7 reasons to find the root cause of the failure and the corresponding solution. In addition, in daily production, you should be familiar with the working principle, performance and common failure phenomena of the vibrating screen, operate it correctly, and do daily maintenance to reduce the failure rate and improve work efficiency.

What to do if the vibrating screen has torsional vibration

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When the vibrating screen is in use,two motors are usually used to drive to ensure sufficient efficiency and vibrating force.However,it is easy to cause material deviation,resonance,and stagnation.This phenomenon is called torsional vibration.What should I do if the vibrating screen has torsional vibration?Here are the reasons and solutions for the torsional vibration of the vibrating screen for your reference.

Reasons for torsional vibration of vibrating screen

Generally speaking,the possible reasons for the torsional vibration of the vibrating screen are as follows:
1.The direction of the exciting force generated by the shaker of the vibrating screen is deflected and offset.
2.The spring damping system and different parts of the linear vibrating screen are malfunctioning.
3.The linear vibrating screen is not placed on a horizontal surface,and the screen surface cannot be kept level.

Solution to torsional vibration of vibrating screen

1.Design and manufacturing

1)Check whether the sieve frame is a standard rectangle,not a parallelogram.
2)Check whether the spring supports of the sieve machine are on the same level during the design and manufacturing process,and whether the selected springs have the same stiffness.
3)Whether the self-synchronization between the two vibrators is normal.
4)Whether the phase angles adjusted by the main and auxiliary eccentric blocks of the vibrating screen on both sides of the same shaft are consistent,because it is related to whether the exciting force that occurs is consistent.

2.Equipment

1)Whether the spring support of the screen machine can be installed on a uniform level,and whether the current shrinkage is the same,the error cannot exceed 5mm.
2)In the case of universal joint device,whether the phase angles on both sides are the same,other reasons should be further judged based on the detailed screen and the operating conditions.

Methods to prevent torsional vibration of vibrating screen

1.During each adjustment,the included angles of the eccentric blocks at both ends of the vibration motor must be equal,and they must be biased to the same side of the vibration motor.
2.Check the rubber springs to ensure that there is no height difference between the springs.If there is,replace the damaged parts to solve it.
3.Perform a comprehensive balance check on the linear vibrating screen equipment and ensure that the screen surface is in a horizontal position.
4.Recalculate the hoisting angle of the equipment to keep the hoisting force consistent.

The above are the reasons and solutions for the torsional vibration of the vibrating screen organized for everyone.I hope it can be helpful to everyone.If you want to know more about the vibrating screen,you can leave a message online or send an email,and we will reply to you as soon as possible.