Detailed maintenance and maintenance work of vibrating screen

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The coal industry often uses vibrating screens to classify and screen materials. The vibrating screen is dynamic during operation, so in addition to correct operation and use, strict maintenance work is conducive to the smooth operation of the vibrating screen and improves the screen. The service life of the machine reduces maintenance costs. Below we will give a detailed introduction to the maintenance and maintenance of the vibrating screen.

Maintenance of vibrating screen

The maintenance of the vibrating screen is divided into daily maintenance and regular maintenance. The following is the maintenance content:

1. Daily maintenance

Arc vibrating screen
The daily maintenance of the vibrating screen includes the surface of the vibrating screen, especially the fastening of the vibrating screen, and the vibrating screen should be tightened in time when it is loose. The vibrating screen regularly cleans the surface of the screen. The vibrating screen should repair, rust and paint the peeled parts of the paint in time. The exposed processing surface should be coated with industrial lubricant to prevent rust.

Before starting, check whether the coarse and fine meshes are damaged; whether each group of beam rings are locked; check whether the V-shaped ring of the screen frame of the rotary vibrating screen is damaged. If there is damage, it needs to be repaired in time to prevent material leakage. When starting, pay attention to whether there is abnormal noise, whether the current is stable, and whether there is abnormal vibration. The vibrating screen can only stop working after the feeder has finished supplying materials, remove the dirt and oil on the vibrating screen, clean and repair the screen in time, when the screen is blocked, it can only be hooked up with a hook.

2. Regular maintenance

Regularly check the coarse mesh, fine mesh and spring for fatigue and damage, and whether various parts of the fuselage are damaged due to vibration. The parts that need to be lubricated must be lubricated.
(1) Overhaul once a year, replace the liner, and refurbish the two screen surfaces. The vibration motor should be removed for inspection, and the motor bearing should be replaced with oil. If the bearing is damaged, it should be replaced.
(2) Check the sieve compression device for each shift. If there is any looseness, press it tightly. Check whether the connection of the feed box is loose. If the gap becomes larger, it will cause a collision and cause the equipment to rupture; check the sieve body support device and observe Whether the hollow rubber pad is obviously deformed or degummed, when the rubber pad is damaged or excessively flattened, two hollow rubber pads should be replaced at the same time.
(3) The screen grid should be removed frequently, and the screen surface should be checked regularly for damage or unevenness, whether the screen hole is blocked, etc.; the sealing strip should be checked frequently, and if worn or defective, it should be replaced in time.

Maintenance of vibrating screen

1. Weekly inspection: check whether the vibrator and each part of the bolts are loose, check whether the rubber spring is damaged, check whether the screen surface is damaged or the screen hole is too large, and deal with it if any.
2. Monthly inspection: check the screen frame structure itself or the weld seam for cracks. If cracks are found on the beam or side plate, the surface should be cleaned, and 5mm holes should be drilled at the end to shovel the groove and preheat the repair welding. The repair welding should ensure penetration , After welding, the seam is ground flat, and the reinforcement plate is added. In order to avoid stress concentration, it is not allowed to open holes and welding accessories on the screen frame.
3. Annual inspection: The vibrator should be overhauled. The vibrator should be completely disassembled for cleaning. If the rolling bearing is pitted or broken, it should be scrapped. When reassembling, pay attention to the position of the eccentric block of the vibrator to keep the same phase.

The maintenance and maintenance of the vibrating screen is very necessary. Only regular maintenance can find the problem in time and deal with it in time to ensure the low efficiency of the vibrating screen, reduce mechanical wear, ensure safe production, and avoid small losses. It happened. Hiside Heavy Industries has been focusing on the research, development and manufacturing of vibrating screens for mines for many years. Each screen is fully assembled before leaving the factory and undergoes an 8-hour idling test run. The amplitude and frequency are tested with a VB instrument to ensure the quality and performance of the vibrating screen. And it’s easy to maintain. If you need it, please contact Hiside for detailed inquiry~

Vibrating screen theory and selection principle

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Vibrating screen is a very important stone grading and screening equipment in the mining industry.It can greatly increase the utilization rate of stone and reduce the failure rate of mechanical equipment in the subsequent processes.It is different from traditional manual screens.To help everyone For a good understanding of this equipment,Hiside has compiled the principles and selection techniques of vibrating screens for your reference.

Vibrating screen theory

The working process of the vibrating screen will use the reciprocating vibration generated by the oscillating excitation,and the upper rotary hammer of the vibrator will cause the surface of the vibrating screen to form plane vibration.The lower rotating weight makes the screen surface produce cone-shaped rotary vibration,and its combined effect makes the screen surface produce double-rotation vibration;

The process of dividing the scattered materials with different particle sizes through a single or multi-layer sieve surface with evenly distributed holes multiple times into several different levels is called sieving.The particles larger than the sieve hole remain on the screen surface,and the particles smaller than the sieve hole pass through the sieve hole,and finally the coarse and fine particles are separated and the screening process is completed.

Vibration screening factor

The characteristics of the material to be screened(the content of the material under the sieve,the content of the difficult-to-sieving particle,the content of moisture and clay in the material,the shape of the material,the specific gravity of the material,etc.);

The structure of the screening machine(screen area,number of screen layers,screen hole size and shape,screen hole area ratio,screening machine movement mode,amplitude and frequency,etc.);

The requirements of the beneficiation process(processing capacity,screening efficiency,screening method,screening machine inclination),etc.High frequency dehydration vibrating screen

Selection principle of vibrating screen

(1)After determining the screening area,the width of the screen surface should be at least 2.5 to 3 times the size of the largest piece of material to prevent the screen from being blocked by large pieces of material.

(2)In order for the sieve to be in good working conditions,the ratio of the length to the width of the sieve should be selected within the range of 2 to 3.

(3)A reasonable screen surface material and structure should be selected to adapt to the working conditions.

(4)Determination of the sieve hole size.For fine sieves and curved sieves,when linear vibrating sieves are used for fine particle screening,the sieve slit size is 2 to 2.2 times the separation particle size,and the maximum is not more than 3 times;for vibrating sieves,For the screening of medium-grained materials,the mesh size is 1.2 times the separation particle size;when used for coarse-grained materials,the mesh size is 1.05 of the separation particle size;for probability screens,the mesh size is generally the actual separation 2 to 2.5 times the particle size.

(5)Determine whether to use double-layer or multi-layer sieves.When the size range of the material to be screened is wide,when the double-layer screen is used as a single-layer screen,the processing capacity of the screening machine can be improved,and the lower screen can be protected,and the life of the lower screen can be prolonged.The selection of the sieve hole size of the upper sieve of the double-layer sieve should generally be determined according to the characteristics of the feed particle size,and the amount of the material under the upper sieve,which is equivalent to 55-65%of the original feed amount,can be considered as the sieve hole.size.

Note that when the content of the under-sieve particle in the raw material exceeds 50%,there are many difficult-to-sieve particles,the material contains more viscous mud and high water content,you should try to avoid using a double-layer sieve as a single-layer sieve.

(6)Determine the effective working area of the sieve.The sieving area calculated according to the production process requirements is the effective area of the sieve,and the size of the sieve is the nominal area of the sieve.For the vibrating screen used for the screening of medium-sized materials,the effective sieving area should be 0.8～0.85 of the nominal area of the sieve Times.Of course,this is closely related to the opening rate of the sieve on the screen.

(7)Heavy-duty vibrating screens are mostly used for materials above 200mm;circular motion screens are mostly used for materials above 10mm;linear vibrating screens and high-frequency vibrating screens are mostly used for desilting,dewatering and grading.

(8)When conditions permit,the seat screen should be selected first to facilitate inspection and maintenance.When a hanging screen must be selected,the lifting height should be minimized to reduce the swing range of the vibrating screen and facilitate production operations.

The above is the principle and selection principle of the vibrating screen that Hiside has compiled for you.I hope it can be helpful to everyone.

Analyze what factors affect the efficiency of linear vibrating screen?

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Linear vibrating screen is indeed very common in the machinery industry.It is mainly used to throw items up during the process of transporting goods,and then place the items accurately in a certain position.So this vibrating screen is very popular.So is the linear vibrating screen always hits every time and works efficiently?It depends on whether there is no problem with the linear vibrating screen,sometimes the linear vibrating screen has a problem,there will be mistakes,resulting in lower work efficiency.So what factors affect the efficiency of linear vibrating screen?

1.Material particle composition

In order to improve the screening efficiency,it is necessary to determine the sieve size of the vibrating screen when the gradation composition of the material to be screened is determined,so that the proportion of the difficult-to-screen material to the material that should be screened is small.

2.The relative size of the material particle size and the screen hole

The particle size of the mineral material should be strictly controlled within the technical parameters of the equipment.If the particle size index difference is too large,it will cause a large production cycle and restrict the quality and processing capacity of the product.

Linear Vibrating Screen

3.Material loose density

The bulk material with larger loose density is easy to penetrate the screen,and the screening efficiency is also higher.

The general introduction about what factors affect the efficiency of linear vibrating screen is the above.In order to ensure the quality of the vibrating screen,welcome to buy Hiside’s vibrating screen.The product is of excellent quality and outstanding performance.Please contact us if you are interested.

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How to improve the screening effect of mine vibrating screen?

Method for removing rust from vibrating screen

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Because the vibrating screen is usually produced in the open air, the screen of the vibrating screen is usually rusted due to rain, humidity and other reasons. So what should I do if the screen of the vibrating screen is rusted? How to prevent and remove rust? Let’s take a look!

1. Set up the isolation layer

The main reason for the rust of the vibrating screen is due to the chemical reaction between its surface and the moisture in the air. Therefore, to prevent the rust of the screen, the screen of the vibrating screen must be isolated from the air. At this time, we can set an isolation layer on the screen, for example, apply petroleum jelly, engine oil, paint, etc. on the screen, or use hot-dip, electroplating, spray coating and other methods to plate corrosion-resistant metal on the screen, usually forming an oxide film to isolate the air Corrosion to the screen, and then do a good job of anti-rust work, reduce the rust of the screen.

2. Do a good job of cleaning dirt and grease

After the vibrating screen is used for a period of time, grease or dirt will adhere to the surface. If it is not cleaned in time, the screen will be rusted. Therefore, the impurities on the screen should be cleaned up in time after using the vibrating screen. It can be cleaned with soap, warm water or weak detergent. If there is oil stains, wipe it with a soft cloth and then clean it with detergent; if there is rust on the surface of the vibrating screen, you can use nitric acid, other derusting items, etc. Rust removal acid cleaning; if rainbow patterns appear, you can dope with neutral detergent in warm water for cleaning.Vibrating Screen

3. Place the vibrating screen in a suitable place

The reason why the vibrating screen is prone to rust is due to the open-air production method. If you want to fundamentally solve the problem of vibrating screen rust, you can use closed production or place the vibrating screen in a relatively clean and dry environment. Reduce the contact between the vibrating screen and the moisture in the air and solve the rust problem of the screen. This method can also reduce the dust pollution problem of the vibrating screen.

Vibrating screen is rusty. Everyone knows that putting the vibrating screen indoors can solve it, but under normal circumstances, the site conditions are not available, so the first two aspects can only be used to make the vibrating screen screen longer. Rust has a great impact on production. If rust occurs, please deal with it in time. If you don’t know how to solve it, you can consult the vibrating screen manufacturer. After all, the rust of the vibrating screen will not only affect the production efficiency of the vibrating screen, but also the production efficiency of the entire machine-made sand production line, so when rust occurs, it must be dealt with in time.

What is the installation process of the linear vibrating screen

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The linear vibrating screen has been widely used in coal screening in the coal mine industry,and the material from the feeder is evenly sent to the entrance of the screening machine.Through multi-layer screens,several screens and screens are produced.The objects are then discharged from their respective outlets.The linear vibrating screen uses vibration motor excitation as the vibration source,so that the material is thrown onto the screen and moves forward in a straight line.From the feeder,the material enters the feed inlet of the linear screening machine evenly through multiple layers.So how do we install the linear vibrating screen correctly?

Installation steps of linear vibrating screen

1.Place the machine on a flat and firm level floor(concrete or steel structure floor),then insert the anchor bolts(the base bolts are provided by the user)and fix it.
2.The spring is placed on the upper and lower seat ring(place the screen),the spring should fully enter the spring seat to ensure that it is vertical and not twisted.
3.The vibration part of the screening machine must not be rigidly connected or contacted with other objects outside the machine.
4.The motor can be installed horizontally and should be fixed on the installation surface to ensure that the installation surface is smooth and flat.
5.The motor lead adopts four-core rubber cable YZ-500V.When the power supply is connected,the lead cable is not allowed to have sharp folds and be securely fixed with the vibrating body.
6.The motor should have reliable grounding.There is a grounding device in the motor.There is a mark on the front end.It can also be fixed with a strong anchor.
7.Adjust the exciting force.The linear vibrating screen will vibrate greatly when it is opened or stopped through its vibrating area.In order to improve this situation,you can connect an electric brake device.High frequency dehydration vibrating screen

Installation of linear vibrating screen

1.Note that you must choose a screen with a larger wire diameter,because the installation of a linear screen is relatively cumbersome.
2.When cutting,the screen width should be the same as the net frame,and the length must be 50~70mm longer than the net frame.
3.When installing,the screen must be tightened,because the tightness of the screen is an important factor that affects the screening.
4.When installing a clear net pinball,you must pay attention to the difficulty of screening the material and the number of meshes,and you cannot install it blindly.
5.If the specific gravity of the material is large or the mesh number of the screen is high,a suitable supporting mesh should be added under the screen.The purpose is to play a supporting role,reduce the pressure of the material on the screen,and prolong its service life..
6.After the mesh frame is assembled to the screen box as required,remember to extend the grown screen into the corresponding outlet to avoid mixing.
7.When installing the pressure plate,be sure to pay attention to its flatness,and line it with a more flexible sponge sealing tape to evenly lock it,because this is the key to preventing mixing and an important factor that affects the service life of the screen.

Installation of other parts of linear vibrating screen

1.Since the tension of the vibrating screen will directly affect the screening,the screen must be tightened and then installed.
2.When clearing the net bouncing ball,consider the number of meshes of the material and the difficulty of screening,and add the bouncing ball appropriately,not blindly.
3.If the mesh number of the screen is relatively high or the proportion of the material to be screened is relatively large,a layer of trawl with a suitable mesh size needs to be added under the screen to play a supporting role,thereby reducing the material to the screen.Pressure can also extend the service life of the screen.
4.The net frame is installed in the screen hammer breaker box as required,and the end of the screen should be extended into the corresponding outlet to avoid mixing.
5.After installation,you should use a little material to test the cloth and screening of the screen.If the material is transported forward uniformly,and the classification is accurate,there is no mixing phenomenon,then it can be put into use;on the contrary,if there is deviation or deviation For unevenness such as accumulation,the flatness and uniformity of the screen surface of the screen should be adjusted;if there is a mixing phenomenon,the sealing of the screen and whether it is compressed should be checked.

Common faults of linear vibrating screen and their solutions

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Linear vibrating screen is one of the commonly used screening equipment.It has the advantages of high screening efficiency,high screening quality,and large processing capacity,and is favored by customers.Then the editor of Hiside below analyzes the common faults during operation of the linear vibrating screen and gives solutions.

1. The problem of vibration

When the linear vibrating screen is screened,the material on the screen surface is discontinuous,and the vibrating screen has vibration problems when starting and stopping.The solution to such problems is to adjust the position of the eccentric wheel and increase the mass of the eccentric wheel.Another:The occurrence of such problems will reduce the service life of the spring and should be resolved in time.

2. The bearing is damage

The bearing seat of the linear vibrating screen is easy to vibrate,the bearing is easy to be damaged by heating,and the bottom beam of the screen is easy to weld or break.The problem is that the mass of the eccentric wheel of the sieve machine is too large,which results in the increase of the exciting force and the increase of the amplitude of the sieve.The common solution is to reduce the mass of the eccentric or change a spring with a larger stiffness to deal with it.Under the premise of ensuring the strength of the shaft,it can be dealt with by changing different types of bearings or changing the strength of the bearing seat.At the same time,the necessary reinforcement of the bottom beam of the screen machine can also extend the service life of the screen.

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3. Low amplitude

The amplitude of the linear vibrating screen is lower than the required parameters.The detailed performance is that the amplitude is too low.If the amplitude is low,it will reduce the overall treatment effect of the linear vibrating screen;on the contrary,if it is the amplitude of the linear vibrating screen If the condition is too high,it will have a certain impact on the service life of the bearing seat,bearing,and bottom beam of the vibrating screen.Therefore,under normal conditions,the user can directly modify the quality of the eccentric wheel directly according to the conditions of the application site of the linear vibrating screen,or use springs of different stiffness to adjust the amplitude of the linear vibrating screen to a certain extent,thereby Meet the needs of production.

The general introduction to the common faults and solutions during the operation of the linear vibrating screen is the above.In order to ensure the quality of the vibrating screen,everyone is welcome to buy the vibrating screen of Hiside.The product is of excellent quality and outstanding performance.Please contact us if you are interested.

 

How long is the service life of the vibrating screen?

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The service life of the vibrating screen

The life cycle of a vibrating screen depends on the equipment production process and the actual use environment. The production process of a piece of equipment is equivalent to the foundation. If you want to have a long service life, you must lay a solid foundation! Regular vibrating screen manufacturers have a strict production process for the screening equipment at the sales office. Namely: detailed communication→design on demand→plate selection→actual production→assembly finished product→logistics delivery→installation and commissioning. The four links of communication, design, plate and assembly are directly related to the life of the vibrating screen.

Factors affecting the service life of vibrating screen

Vibrating Screen

1. The influence of vibrating screen design
Whether the communication is detailed or not affects whether the finished product meets the actual production requirements of the user. Whether the design is qualified or not is an important link related to the user’s actual production output and equipment service life. Therefore, only detailed communication in the early stage can design and produce screening equipment that meets the user’s production requirements.

2. The impact of using plates

Different thicknesses of the same plate and different element content will also affect the service life of the vibrating screen. Common materials for vibrating screens are Q235 carbon steel and 304 stainless steel. Take the round screen as an example: Q235 carbon steel plate thickness is 3mm for the screen frame and 5mm for the bottom barrel. , 304 stainless steel sheet thickness is 2mm for the screen frame and 5mm for the bottom barrel. Simply put, the thickness of the same material is different, and the different element content will directly affect the service life of the equipment.

3. The impact of vibrating screen production and operation

In the process of using the vibrating screen, the nature of the material, the production environment, and the feeding method will also affect the service life of the equipment. In the actual production process, the production staff must strictly follow the design drawings and requirements to produce so as to ensure that it will not be affected! In addition, the vibrating screen The operating environment is also one of the key factors affecting the service life, such as environmental problems such as humidity and corrosion.

Causes and solutions of the hole blocking of the vibrating screen

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The core component of the vibrating screen is the screen. A good screen is an important condition to ensure the accuracy and efficiency of the vibrating screen. However, if too much material is fed at a time, it is inevitable that the screen will block the holes, and the screen will wear out in the long run. The situation will affect the accuracy of the vibrating screen. The following are several common reasons and solutions for the blockage of the vibrating screen mesh for your reference.

Causes of blocking holes in vibrating screen

(1)Contain a large number of critical material particles close to the separation point. That is, the particle size of the crushed stone is critical to the mesh size of the screen. During the screening of the stone, such particles are stuck in the mesh and cannot pass through the screen smoothly, which is called critical hole blocking.

(2) There are many materials that have multiple contact points on the screen.

(3)There are many flake particles. Due to the crushing or the stone itself, there are many flake materials in the stone material, and the flake materials themselves cannot be smoothly passed through the screen during the screening. At the same time, the flake materials are intertwined into a net shape, which prevents other materials from passing through the screen and causes hole blocking.

(4)The diameter of the steel wire for the screen is too thick.

(5)The screened material contains high moisture and viscous substances such as mud and sand. Because there is a lot of mud in the stone, or when the stone requires water washing, the fine-grained stone will stick to each other into agglomerates due to the intervention of water on the one hand, and the soil will stick to the screen surface on the other hand, making it difficult to screen the material and causing blockage .

Except for the fourth type, the first and second types are inevitable. The third and fifth types are more or less existent. The fixed mesh screen cannot effectively overcome the impact of critical material particles on the screen hole. Blockage, resulting in low screening efficiency of the vibrating screen. Generally, the screening efficiency of a vibrating screen with a fixed mesh screen is less than 50%. Even if the amplitude is increased, it cannot effectively solve the blockage. Moreover, increasing the amplitude may affect the service life of the screen.

Vibrating Screen

Method to solve the hole blocking of vibrating screen

In order to effectively solve the above-mentioned hole blocking problem, the effect of blocking holes can be achieved by changing the form of the mesh structure of the vibrating screen. Here are several kinds of blocking hole screens:

(1)Under the premise of meeting the construction requirements, deform the mesh and use a certain proportion of rectangular holes. For example, the original requirement of 3.5mm*3.5mm mesh is changed to 3.5mm*4.5mm rectangular holes. However, the direction of the mesh is different, which will affect the screening efficiency or the service life of the screen to a certain extent.

(2)It adopts diamond-shaped hole anti-blocking screen, which is made of the same two adjacent screen bars with small vibrations, which has a better anti-blocking effect.

(3)In order to further improve the anti-blocking effect of the vibrating screen, some manufacturers have introduced a triangular hole anti-blocking screen. The feature of this screen is that of the two adjacent screens, one is a static screen and the other The root is a moving screen.

In fact, there are many factors that affect the efficiency of vibrating screens, and we have also introduced them in detail in the article how to improve the screening effect of mine vibrating screens. In addition to the clogging of the screen, improper installation of the screen can also cause low efficiency of the vibrating screen. Therefore, every time you replace the vibrating screen, you must strictly follow the instructions provided by the manufacturer.

Instructions for use of linear vibrating screen

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The linear vibrating screen is mainly composed of a screen box, a mesh frame, a screen mesh, a vibration motor, a motor base, a damping spring, and a bracket. Using the vibrating screen exciter as the vibration source, 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 specifications through the multi-layer screen. The oversize and undersize items are respectively discharged from their respective outlets. It has low energy consumption, high output, simple structure, easy maintenance, fully enclosed structure, no dust spillage, automatic discharge, and is more suitable for assembly line operations.

Features of linear vibrating screen

(1) The design of the screen machine is exquisite and easy to assemble. One person can operate the screen machine.

(2) Compared with other related vibrating screens, it has a larger screening area and effective processing capacity.

(3) The unique structure design of the screen makes it easy and quick to replace the screen (only 3 to 5 minutes). In addition, this design allows the use of various material screens.

(4) The mother net completely supports the fine mesh, so the fine mesh can have a longer lifespan, and the use of fine mesh consumables is reduced, which can reduce many costs for the long-term production process.

(5) The linear vibrating screen has the characteristics of high screening accuracy, simple structure, convenient maintenance, low energy consumption, low noise, good sealing, reduced dust pollution, long screen life, and can be used for automated operations in assembly line production.

Working principle of linear vibrating screen

The linear vibrating screen is driven by dual vibrating motors. When the two vibrating motors are running synchronously and in opposite directions, the exciting force generated by the eccentric blocks cancels each other out in the direction parallel to the motor axis, and stacks in the direction perpendicular to the motor axis to form a resultant force, so the material is in the linear vibrating screen The motion trajectory on the machine is a straight forward parabolic motion. The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the material’s self-gravity, the materials are thrown up and jump forward on the screen surface for linear motion, so as to achieve the purpose of screening and grading the materials.

Linear vibrating screen installation

1. Screen box: It is welded from several steel plates with different thicknesses, with certain strength and rigidity, and is the main part of the screen machine.

2. Mesh frame: It is made of wood with less deformation, which is used to keep the screen flat and tight to achieve normal screening. If the specific gravity is large or the output is large, the metal screen frame can be used.

3. Screen: Use a composite national standard stainless steel screen.

4. The use and maintenance method of vibrating screen exciter can refer to its instruction manual.

5. Motor pedestal: The motor pedestal of the standard type (the motor is installed under the screen box) is movable. The connecting screws must be tightened before use, especially the new sieve must be tightened repeatedly three days before the trial to avoid loosening. accident.

6. Vibration damping spring: prevents vibration from being transmitted to the ground and supports the full weight of the screen box. When installing, the spring must be perpendicular to the ground.

7. Bracket: It is composed of channel steel and supports the main body of the vibrating screen. The pillars must be perpendicular to the ground during installation, and the channel steels under the two pillars should be parallel to each other. Rubber springs have been tested for static stiffness before they leave the factory. Springs with the same (or similar) stiffness should be selected and placed on different supporting positions of the same vibrating screen.

When installing, place the rubber spring on the lower support seat, make the boss on the support seat enter the inner hole of the spring, and then hoist the main body. Make sure that the inner hole of the rubber spring is centered on the boss of the support plate. The box is dropped vertically and placed on the rubber spring. At this time, the height of the rubber spring at each support point should be the same, and the error should not be greater than 2mm. The connection of each part of the sieve machine must be firm and reliable, all bolts must not be loose, and there must be no abnormal sound at each part. The small gap between the vibration-absorbing part on the main body and the surrounding fixed objects is 30-50mm.

High frequency dehydration vibrating screen

Regular inspection and maintenance of linear vibrating screen

1. The linear vibrating screen should be equipped with electrical protection devices.

2. In the early stage of operation, check the anchor bolts at least once a day to prevent loosening.

3. When the motor rotation direction does not meet the requirements, adjust the power phase sequence.

4. The motor should be well lubricated. Replenish lithium grease (ZL-3) every two weeks or so. When refueling, add an appropriate amount of lithium grease through the oil cup. When using sealed bearings, the motor is not equipped with an oil cup.

5. After the equipment has been running for 1500 hours, the bearings should be checked and replaced immediately if there is serious damage.

6. When the linear vibrating screen is used again after being parked for a long time, the insulation resistance should be measured. It should be greater than 0.5 megohm for 500V megohmmeter measurement.

Before starting the linear vibrating screen, check whether there are obstacles that hinder the operation of the screen machine and whether the connecting bolts are fastened everywhere, especially the fixing bolts of the exciter, support seat, and screen plate should be tightened again. Check whether the rotation directions of the two vibration motors or exciters are opposite. If the rotation directions are the same, change the power connection of one motor so that the rotation directions of the two motors are opposite. After 4 hours of continuous operation, measure the bearing temperature. The bearing temperature should not exceed 75°C. Before the screen machine is stopped, the feeding should be stopped first, and then stop after the screen surface material is finished. After the pause, clean up the materials and debris on the screen surface in time. The vibrating motor or vibrating screen exciter should be refueled once after 3 months of use, minor repairs every six months, and major repairs every year.

Common problems and solutions of vibrating screen exciter

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Screening equipment is an important auxiliary equipment in mining, building materials, chemical industries and other industries. Its performance directly affects production capacity and technical and economic indicators. Therefore, it is very necessary to understand some common fault diagnosis and solutions of vibrating screens in production practice. This article shares the common problems of vibrating screen exciters, the main reasons and solutions for the cracking and deformation of the screen frame and side plates.

The exciter is the vibration source of the screen body. The amplitude can be adjusted by the counterweight. When the exciter is working, the centrifugal force generated by the eccentric mass is selected as the exciting force. When the biaxial exciter rotates synchronously, The screen box performs reciprocating linear vibration, and the materials are screened through the gap of the drying surface, and then the screening work of the product mine is completed.

The failure of vibrating screen exciter generally has the following situations:

FE (HE) Series Vibrating Screen Exciter

1. Start under heavy load

Sudden shutdown due to production or other equipment failures makes the screen box full of minerals. If the exciter starts again under heavy load, it is very easy to cause damage to the universal coupling and other parts of the exciter.

Solution: Avoid restarting the vibrating screen under heavy load.

vibrating screen exciter NE100

2. Damage to the damping system

If the damping spring fails or too much material under the screen, etc., the damping system will be uncoordinated and cause damage to the vibration exciter.

Solution: Check the damping spring regularly, and replace the springs that fail and deform in time. When replacing, replace all the damping springs at the same time as much as possible, and ensure that the stiffness of each group of springs before and after replacement is consistent.

In summary, there are two common problems with vibrating screen exciters and corresponding solutions. The vibrating screen exciter must strictly follow the corresponding operating instructions during the installation and use process to ensure the safe operation of the equipment.