What should I do if the vibration force of the linear vibrating screen is light? Causes and solutions

The linear vibrating screen gets its name because the material’s motion trajectory is straight. It uses the exciting force as the source of vibration to throw up the material on the screen while the material moves forward in a straight line. After the material passes through the screen, the material is separated from the inlet. It is the oversieve and undersieve, which are then discharged from the discharge port respectively. The vibrating force of the vibrating screen is the source of throwing up the material, so it needs to have a certain vibration force, so what should I do if the vibrating force of the linear vibrating screen is light?

1. Reasons for the light vibration of the linear vibrating screen

High frequency dehydration vibrating screen

1. The power supply cannot operate normally

For the linear vibrating screen, the screen cleaning device is also the second power source to provide the vibrating force. Once the transducer is overheated or the power supply fails to operate normally, the vibrating force of the vibrating screen can be reduced. The inspection standard is that the normal temperature of the transducer is 60°C during operation. If the temperature is found to be abnormal, it should be shut down for maintenance, mainly due to material residues. Therefore, the contact part of the transducer and the screen should be cleaned before the screen is operated.

2. Vibration motor failure

The vibrating motor is the main power source of the vibrating screen. Once the motor fails, the vibration force will decrease. So what are the problems with the motor? The lack of oil in the motor will affect its operation, and once the lubricating oil consumption is severe, the friction of the motor components will increase and the vibration force will be reduced. Therefore, it is necessary to check the fuel consumption of the motor regularly, and immediately stop and add lubricating oil once it is found.

3. Design and production issues

At the beginning of the design of the vibrating screen, if there is no detailed communication, and the model is selected without understanding the characteristics of the material and the required output, the vibrating screen designed and produced will easily appear inconsistent with the requirements, and the vibration force will be too light and fail to meet the production requirements. The problem. Therefore, when we purchase vibrating screening equipment, we should also provide detailed material characteristics and required output, so that the vibrating screen manufacturer can also suggest suitable models for you according to the detailed parameters.

Second, the solution to the light vibration of the linear vibrating screen

1. Adjust the exciting force

First, adjust the excitation force to adjust the angle of the eccentric block. There are eccentric blocks at both ends of the motor, and this eccentric block has a certain angle. The excitation is different for different angles. The angle is smaller, the excitation force is smaller, and the angle is larger. , The excitation force is larger, at this time, you can adjust the angle of the eccentric block according to your own needs, and you can also change the movement trajectory and residence time of the material on the screen. In order to adapt the screening machine to the required separation state of various materials, such as various changes in the distribution of materials, output per hour, screening efficiency, penetration rate, etc., the angle of the eccentric block is adjusted to the ideal state.

2. Adjust the angle and gauge

To adjust the angle of the vibrating screen, you need to open the adjustment hole of the bottom barrel. Loosen the fixing bolts of the lower eccentric block. Screen the material trajectory according to the required. Adjust the phase angle of the upper and lower weights in the opposite direction of the discharge port. Then put a small amount of material on the screen surface, make the screen machine run, and check the movement trajectory of the screen surface material. If the processing parameters have reached the effect, stop the machine and tighten the fixing bolts, and the adjustment is over.

3. Adjust the weight of the eccentric block

The weight adjustment of the eccentric block can be equipped with additional weights on the upper and lower weights. The main function is to increase the exciting force output by the screen machine. According to the number of layers of the screen machine and the specific gravity of the material to increase or decrease the exciting force, increase or decrease the additional weight. Then test the machine to observe the weight, and wait until the screening machine reaches the screening effect. Sometimes due to the influence of the specific gravity of the material, the humidity, the tilt angle and other parameters, it is impossible to adjust the stagger angle one-time successfully, so Users are requested to have sufficient patience to make adjustments so that the screen machine can play its due efficiency.

3. Measures to prevent the vibration of the linear vibrating screen from being light

1. Feeding at a constant speed

When using the vibrating screen, some users find that there are a lot of objects on the screen and they feel that the machine can’t move. At this time, the reason is that there are more materials. When the material can be fed, the material is fed at a constant speed, so that the material is at a relatively uniform speed when the material is unloaded. Will not press the machine to reduce the exciting force.

The exciting force of the vibrating screen itself originates from the vibrating motor itself, so at the moment of its operation, the motor itself will have a high temperature rise, and it is precisely because of the existence of this cooperation gap that the shaft of the vibrating motor will expand after the temperature rises. The shaft after expansion happens to work closely with the bearing, and the rod reaches the normal operating condition. If it is not maintained, the excitation force may not be reached. Therefore, the motor needs to be maintained and maintained regularly.

The above is the answer to what to do if the vibration force of the linear vibrating screen is light. First of all, we must know that the reason for the light vibration force may be caused by the power supply failure, motor failure and design and production problems. Secondly, we want to solve this problem. It can be solved by adjusting the excitation force, the angle gauge, and the weight of the eccentric block. If you want to prevent it, you need to maintain the motor and feed evenly.

Summary of common problems and solutions for coal centrifuges

Coal centrifuge is a machine that uses centrifugal force to separate liquid and solid particles or each component in a mixture of liquid and liquid. It is mainly used to separate the solid particles in the suspension from the liquid; or to separate the two incompatible liquid substances in the emulsion with different densities; it can also be used to remove the wet solid For liquids, special ultra-velocity tube separators can also separate gas mixtures of different densities; taking advantage of the different settling speeds of solid particles of different densities or particle sizes in liquids, some sedimentation centrifuges can also determine the density or size of solid particles. To classify. So in the process of use, how to maintain the coal centrifuge? Let us follow the coal centrifuge manufacturers to learn more about it!

Common problems of coal centrifuge

Reasons for the power supply and the motor not running:

1. The power cord is disconnected internally, and the plug and socket are in poor contact.

2. The speed regulator switch is out of order, the power supply is not turned on, or the connection wire is disconnected.

3. The brush is open, and the brush is stuck or severely worn out of contact with the commutator.

Maintenance method:

1. Check the power lead and replace the plug and socket with poor contact.

2. Open the bottom cover, check the speed regulator with a universal meter, repair the open circuit, and replace damaged parts, such as worn-out brushes.

 Reasons for the motor not reaching the rated speed:

1. The power supply voltage is too low, and the speed is obviously slowed down when the power supply voltage is below 190V.

2. The bearing is damaged and the rotation is not flexible, or the bearing is lack of oil and dirt, which causes the bearing to heat up and increase the friction resistance.

3. Poor contact between the two brushes.

Clean Coal Centrifuge

Maintenance method:

1. Find out the reason for the low power supply voltage, adjust the voltage to 220v with a power supply regulator, and when the voltage reaches normal, polish the rectifier with sandpaper to make the brush and the rectifier have good contact.

2. When the bearing is short of oil or dirty, it should be cleaned first and then refueled. It is acceptable to add butter or petroleum jelly. The lubrication amount is 1/3~3/2 of the bearing clearance. If the bearing is damaged, replace the bearing.

The vibration is large when rotating, the centrifuge jitters back and forth, and the noise is large. The causes:

1. The bearing or bearing sleeve on the motor is severely worn.

2. The upper end of the motor is mainly bent.

3. The load is unbalanced, the two test tubes are asymmetrical, the weight of the sleeve is different, there are more broken glass in the sleeve, and the centrifuge tube sleeve does not meet the requirements.

4. The rotor of the motor is not in the center of the magnetic field, that is, the space around it is inconsistent or the outer cover is deformed in the wrong position, friction and noise will occur.

5. The motor and the bottom screw are loose, the shaft is not vertical, and the machine feet are not flat.

6. The centrifuge fixing screws with damping springs are loose or the springs are broken.

Maintenance method:

1. Replace with new bearings or sleeves.

2. Remove the main shaft for straightening or replace the main shaft.

3. The test tube and the casing must be balanced and weighed at the same time. High-speed centrifugal balance is more important. The centrifuge tube sleeve cannot be changed at will.

Slime Centrifuge

Reasons for long-term shutdown or low-speed startup in cold weather:

1. Lubricant solidification.

2. Lubricating oil deteriorates and sticks.

Maintenance method:

1. After power on, it can be started with manual help, and it will return to normal after running at high speed for a period of time.
2. Clean the bearing and re-oil it.

Causes of damp and leakage:

1. The centrifuge is useless for a long time, the indoor humidity is high, and the moisture is eroded.

2. Insulation between the live part of the centrifuge and the casing of the machine is not good or the insulation performance of the insulator decreases after being damp.

Maintenance method:

1. The centrifuge that has not been used for a long time should be kept dry. Generally, it should be energized at least once a month and rotated for 15 minutes. If moisture is found, it can be rotated continuously for 2 hours to drive off the moisture in the machine.

2. When the cabinet is leaking, the contact point between the live wire and the cabinet should be found and replaced with a new one. The case must have a good grounding wire.

How does the vibrating screen work?

Vibrating screens have been widely used in mining, metallurgy, coal, water conservancy, transportation, and chemical industries to complete various processes, such as screening, grading, washing, de-intermediation and dehydration of materials . As an intermediate link between mining and smelting, mineral processing efficiency not only directly affects mineral processing productivity, but also has a profound impact on the rational use of national resources.

The vibrating screen works by using the double-rotation vibration generated by the vibrator. The upper rotating weight of the vibrator makes the screen surface vibrate in plane, while the lower rotating weight makes the screen surface vibrate the cone surface. Its combined effect The effect is that the screen surface produces double-rotating vibration. Its vibration trajectory is a complicated spatial curve. The curve is projected as a circle on the horizontal plane, and projected as an ellipse on the vertical plane. The amplitude can be changed by adjusting the excitation force of the upper and lower rotating weights. Adjusting the spatial phase angle of the upper and lower weights can change the curve shape of the screen surface movement trajectory and change the movement trajectory of the material on the screen surface.

High frequency dehydration vibrating screen

Vibrating screen equipment can be divided into: mining vibrating screen, light fine vibrating screen, and experimental vibrating screen according to its weight.

Mine vibrating screens can be divided into: heavy-duty screens, self-centering vibrating screens, elliptical vibrating screens, dewatering screens, circular vibrating screens, banana screens, linear vibrating screens, etc.;

Light fine vibrating screen can be divided into: rotary vibrating screen, linear screen, straight row screen, ultrasonic vibrating screen, filter screen, etc.;

Experimental vibrating screen: flapping screen, top-strike vibrating screen, standard inspection screen, electric vibrating screen, etc.

According to the material running track of the vibrating screen, it can be divided into:

According to the linear motion trajectory: linear vibrating screen (the material moves forward on the screen surface in a straight line);

According to the circular motion trajectory: circular vibrating screen (materials move circularly on the screen surface);

According to the reciprocating motion trajectory: fine screening machine (materials reciprocate forward on the drying surface).

Arc vibrating screen

In recent years, although vibrating screening machinery has achieved unprecedented development, the theoretical framework of vibrating screens has been stable and becoming mature. Various types of vibrating screens have been introduced one after another, but vibrating screens with high screening efficiency and large output have always been vibrating. The new direction of sieve research and development.

The coal or ore mined in the mining field, or the crushed material, before the material is used or further processed, it needs to be divided into several grades of similar particle size or be dehydrated, de-intermediated, de-slimed, and sometimes a combination of several items. Yes. When performing the above work, there is always the problem of grading materials through the holes of the screen surface, and the grading of materials through the holes of the screen surface is called sieving. Through the research on the screening process of materials, it is found that the screening of materials can be divided into two stages:

1. Fine-grained materials smaller than the mesh size reach the screen surface through the material layer composed of coarse-grained materials;

2. The fine particle material passes through the sieve holes on the sieve surface to complete the sieve.

When the vibrating screen is working, the two motors synchronously and reversely rotate to make the exciter produce a reverse excitation force, forcing the screen body to drive the screen to move longitudinally, so that the material on it is periodically thrown forward for a range due to the excitation force. So as to complete the material screening operation. It is suitable for screening sand and gravel materials in quarries, and can also be used for product classification in coal preparation, mineral processing, building materials, electric power and chemical industries.

The working part of the vibrating screen is fixed, and the material is screened by sliding along the working surface. Fixed grid sieve is one of the most widely used in concentrators, generally used for pre-screening before coarse crushing or medium crushing. It has a simple structure and is convenient to manufacture. It does not consume power and can directly unload the ore onto the screen surface. The main disadvantages are low productivity and low screening efficiency, generally only 50-60%. The working surface of the vibrating screen is composed of horizontally arranged rolling shafts. There are plates on the shafts, and fine-grained materials pass through the gaps between the rollers or plates.

In order to smoothly complete the screening process of the material, the condition of relative movement between the material and the screen surface must be satisfied. Therefore, the screen box of the vibrating screen should have suitable movement characteristics, on the one hand, it can make the material on the screen surface become loose.

On the other hand, it can make the coarse particles blocked on the sieve holes escape, and keep the fine-grained materials smoothly through the sieve. In the actual production process, the actual screening process is: “After a large number of broken materials with different particle sizes and mixed coarse and fine particles enter the screen surface, only a part of the material contacts the screen surface. In this part of the material contacting the screen surface, It is not entirely a fine particle material smaller than the mesh size,
Most of the remaining fine particles smaller than the mesh size are distributed throughout the entire material layer.

Through the movement of the screen box, the material layer on the screen surface is loosened, so that the gap that exists between the large particles is further expanded, and the small particles take the opportunity to pass through the gap and transfer to the lower layer; at the same time, due to the small particles between the materials The gap is small, and large particles cannot pass through. Therefore, the position of large particles increases continuously during the movement. As a result, the original messy material particle group separates, that is, it is layered according to the particle size, forming an arrangement rule with small particles on the bottom and coarse particles on the top.

The fine particle material that reaches the screen surface, because its size is smaller than the sieve hole size, can smoothly penetrate the screen, and finally realize the separation of coarse and fine particle materials and complete the screening process.” However, sufficient separation is impossible. In time-sharing, there is generally a part of the fine particles remaining in the coarse particles on the sieve and cannot penetrate the sieve. Research shows that although the size of the fine particles is smaller than the sieve hole, the difficulty of their penetration is not the same. Compared with sieve holes, the smaller the particle size, the easier it is to penetrate the sieve, and vice versa, the more difficult it is.

How to disassemble the bearing of the vibrating screen

In the production process of the coal industry, crushing equipment is first needed to crush the materials, and then the crushed materials are screened. The vibrating screen is here to undertake the screening task. In the vibrating screen equipment, the bearing is the key component of the equipment. Generally, heavy-duty bearings are selected to facilitate carrying a certain axial load. The working load of the bearing is very large, the speed is high, the temperature is high, and it is accompanied by strong vibration and shock. After time, the bearing needs to be replaced. Replacing the bearings also includes disassembly and installation, so how to disassemble and install the vibrating screen’s bearings? Now, the editor of Hiside will introduce it.

1. Disassembly steps of vibrating screen bearing

①Disassembly of outer ring bearing

Disassemble the outer ring with interference fit, set several screws for extruding the outer ring on the circumference of the shell in advance, tighten the screws evenly while disassembling. These screw holes are usually covered with blind plugs, vibrating screen tapered roller bearings, etc. Separate bearing, set several cuts on the shoulder of the shell, use a spacer, disassemble it with a press, or tap it to disassemble it.

Linear Vibrating Screen

②Disassembly of inner ring bearing

The bearing of the inner ring is generally a cylindrical bore bearing, and this kind of bearing is disassembled to be pulled out by a press machine. At this time, pay attention to let the inner ring bear its pulling force. The inner ring of the large-scale vibrating screen bearing is disassembled by oil pressure. Oil pressure is applied through the oil hole provided on the shaft to make it easy to draw. For bearings with a large width, the hydraulic method and the drawing fixture are used together for disassembly operations. The inner ring of the cylindrical roller vibrating screen bearing can be disassembled by the induction heating method. It is a method to heat the part in a short time to expand the inner ring and then pull it out.

③Disassembly of small bearings

Disassemble the relatively small bearing with adapter sleeve, support the inner ring with the stopper fastened on the shaft, turn the nut back several times, and then use the cushion block and hammer to knock to complete the disassembly.

2. Installation steps of vibrating screen bearing

When replacing a new bearing for a mine vibrating screen, the same bearing as the original model must be used.
①Wash 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 Adhesive fastening bolts compress the bearing gland;
②The 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 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 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 rotating shaft should have a certain axial movement;
⑥Put on the protective covers at both ends and fasten them with screws.

3. Precautions for disassembly and assembly of vibrating screen bearings

①When disassembling the bearing, pay attention to the removal of the protective cover 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.
③Remove the bearing seat compression bolts, screw into the bearing seat removal screw holes with appropriate bolts, and eject the bearing seat from the housing;
④Remove the bearing gland from the bearing seat, and press out the bearing from the bearing seat or push it out with a suitable bolt;
⑤If 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;
⑥ After the bearing is disassembled, pay attention to clean the oil stains of all parts. After disassembling the vibrating screen bearing, we need to replace it with a new bearing. Below we will talk about the installation steps of the bearing;
⑦The shaft of the bearing must be properly supported, otherwise the disassembly force is likely to damage the bearing.

The above is the answer on how to disassemble and install the bearing of the vibrating screen. We must follow the correct steps during the disassembly and assembly process, otherwise it may cause internal damage to the bearing, so you need to be careful regardless of disassembly or installation. Hiside Heavy Industries focuses on the manufacture of vibrating screen equipment. The products are high in strength. They are riveted with HUCK bolts, without any welds, and have low power consumption. If you need them, please contact Hiside for detailed inquiries~

What should I do if the vibrating screen box is cracked?

The main body of the vibrating screen is composed of a screen box,a tension plate and a screen mesh.After a long time use of the lifting screen box,there may be problems such as cracking.What should I do if the vibrating screen box is cracked?This article introduces the main reasons and treatment measures for the cracking of the vibrating screen box for your reference.

Reasons for cracking of vibrating screen box

1.The production load is too large,causing the equipment to run overloaded and cannot bear it,and the screen box cracks and the beam breaks failure;

2.The parts in the screen box such as the screen mesh are loose due to various reasons and resonate with the vibrating screen,causing cracking failure;

3.Due to the design of the equipment itself,the screen box steel beam is relatively thin and cannot adapt to the harsh production environment,causing the equipment to crack;

4.Deflection vibration of the vibrating screen causes cracking.Arc vibrating screen

Treatment measures for cracking of vibrating screen box

1.Appropriately increase the inclination angle of the vibrating screen to increase the sliding speed of the screen surface and reduce the thickness.

2.Replace the original plate screen with a bar screen.

3.Improve the support ribs on the screen surface of the vibrating screen,increase the number of support ribs in the middle of the screen(increased from 3 to 5),and each of them is consistent with the middle one.It has the function of installing fixing bolts and passing multiple pressure plates.Press tightly to ensure that the screen is fixed and reliable,and resonance cannot be achieved.

4.By processing the reinforcing ribs,using the original bolt holes on the screen box,install the reinforcing ribs near the 4 supporting feet to strengthen the strength of the side plates of the screen box.

5.Through the rectification of the vibrating screen into the hopper,the feeding situation is improved,and the height of the support foot damping spring is regularly measured to ensure the balance of the support foot.

6.Regularly check all parts to ensure that the equipment is fault-free,and when lubricating,each vibration exciter bearing adopts quantitative lubrication to ensure that the resistance of the grease in each vibration exciter to the vibration exciter is roughly the same,and the vibration track is normal.

From the above content,it is not difficult to see that if you want to avoid cracking of the vibrating screen box,you must first ensure that you buy a high-quality vibrating screen,and secondly,you must do a good job in the maintenance of the vibrating screen.As a vibrating screen manufacturer,Haiside Heavy Industry produces vibrating screens with stable performance and reliable quality.If necessary,you can leave us a message for detailed consultation.

Causes and solutions of blockage of vibrating screen

Linear vibrating screen is an important equipment in coal preparation, mineral processing, building materials, electric power and chemical industries, and various faults often occur in daily use, which affect the use. For example, vibrating screens often encounter the problem of screen clogging when sieving materials. Today, the editor summarizes the reasons for the blockage of the linear vibrating screen, and solves the problem of blockage through corresponding methods.

Causes of blockage of vibrating screen

The processing capacity of the vibrating screen is positively correlated with the effective opening rate of the screen. The larger the effective opening rate, the better the penetration of the material and the greater the processing capacity of the vibrating screen. In actual production applications, there are two factors that cause the effective opening rate of the vibrating screen to decrease (ie, the screen is blocked): one is the proximity effect, which refers to the formation of particles with the same diameter as the screen being embedded in the mesh. Clogging; there is also the accumulation effect, which is mostly caused by the stickiness of materials or the blocking of the screen caused by accumulation and agglomeration caused by electrostatic mutual adsorption. Therefore, to ensure the throughput, the cleanliness of the screen mesh must be maintained. There are generally two main reasons for the blockage of the vibrating screen: the first material and the second screen. Specifically, the reasons for the blockage of the vibrating screen can be summarized as follows:

1. The density of the material is high, and the selection of the screen is inappropriate;
2. The material to be screened is wet;
3. The material to be screened has static electricity or is easy to stick;
4. The screened materials are lighter;
5. The screen wire has a large diameter and is not easy to blank;
6. The bottom of the screen lacks a net cleaning device (rubber bouncing ball), also known as a clear tennis ball;
7. The woven screen wire is too thick;
8. Spherical particles or materials with multiple contact points to the sieve holes;
9. There are more flaky particles;
10. Thicker screens, such as rubber screens, have unreasonable hole shape design, which does not reach the upper and lower sizes, which causes the particles to get stuck. Because most of the material particles that need to be screened are irregular, the causes of blockage are also diverse.

The solution to the blockage of the vibrating screen

In order to effectively prevent the blockage of the linear vibrating screen, measures should be taken to address the reasons for the blockage of the screen:
1. Analyze and judge the materials to be screened, and select the appropriate screen. If the screen is blocked, the first thing to consider is whether the particle size of the screened material is appropriate, and more importantly, the characteristics of the screened material. If it is viscous, it will easily stick to the screen and cause the screening efficiency to drop. You can properly adjust the amplitude of the vibrating screen to see the effect.
2. In addition, the poor self-cleaning ability of the screen may also cause the mesh to be blocked. At this time, if the vibrating screen permits, a ball support plate can be installed, which uses the principle of a bouncing ball to make the screen Clean up.
3. When sieving materials with fine particles, high moisture content and mud content, the materials are easy to bond, and when the moisture content is greater than 5%, they need to be dried, dehydrated and then screened. If the moisture content is greater than 8%, wet screening is required. .
4. For materials with more flake particles, pay attention to adjusting the crushing method of the materials and the particle size matching of different crushing processes.
5. The vibrating screen is equipped with different numbers of rubber bouncy balls under different meshes.
6. Reasonable adjustment of the tension of the vibrating screen is an effective way to reduce the hole blocking of the screen. The reasonable tension makes the screen and the supporting beam produce a slight secondary vibration, thereby effectively reducing the phenomenon of hole blocking. Occurrence, this can better make the screen work properly. The specific method is: the tension hook is made into a constant tension mechanism, that is, a spring is installed on the tension bolt, so that the phenomenon of blocking the holes of the vibrating screen can be avoided, and the screening effect can be improved, so that the vibrating screen can be screened. higher efficiency.

Precautions for maintenance and overhaul of vibrating screen exciter

The vibration exciter of the vibrating screen is the power source of the entire equipment.The principle is to install a set of adjustable eccentric blocks at both ends of the rotor shaft,and use the centrifugal force generated by the high-speed rotation of the shaft and the eccentric block to obtain the exciting force.If improperly,failures will frequently affect the entire screening production work of the vibrating screen.Here,the vibrating screen manufacturer introduces the maintenance and overhaul precautions of the vibrating screen exciter,hoping to be helpful to everyone.

Maintenance of vibrating screen exciter

1.Maintenance of vibration exciter bearing

The supporting vibration exciter bearing on the vibrating screen should be refilled with grease regularly,usually every 2 to 3 months.The oil filling amount is 1/3 to 1/2 of the volume of the bearing chamber.When disassembling the bearing,record the position of the eccentric block and the value of the excitation force.After the bearing is replaced,check that the shaft of the exciter should have a certain axial movement.First,install the eccentric block and test the vibration exciter.After the operation is normal The eccentric block needs to be reset according to the original record.If replacing a new bearing,the original bearing model should be used.BE Series Vibrating Screen Exciter

2.Operating temperature of the exciter

The normal operating temperature of the shaker of the vibrating screen is about 45℃,and the maximum temperature should be controlled within 60℃.After starting the vibrating screen,do not start the shaker.Check whether the shaker has problems such as noise and heat.Once the temperature of the shaker is found to be too high It should be shut down for maintenance.

3.Maintenance of the exciter circuit

The vibrating screen exciter requires regular overhaul and minor repair.During minor repairs,it is necessary to remove the dust inside,check the insulation resistance of the coil and whether the wiring is firm.During major repairs,check the wear of the bearings and joints,grounding,and whether the fastening bolts are loose and fastened in time.Replace with new grease.Outgoing cables are vulnerable parts that are often damaged by vibration and friction,causing the exciter to run out of phase and damage the exciter.The condition of the cable should be checked frequently,and the cable of the same type should be replaced in time if it is worn.

4.Maintenance of the eccentric block of the exciter

The eccentric block protective cover of the vibrating screen exciter should be well sealed to prevent dust from entering and affecting the operation of the exciter.When adjusting the excitation force of the eccentric block,the eccentric blocks on both sides need to be kept coincident with the axial direction,and then the eccentric blocks on the two ends of the shaft should be adjusted to the same angle in the same direction,otherwise the vibration exciter will have a great misalignment.Exciting force,and even damage to the exciter.

Precautions for overhaul of vibrating screen exciter

1.Replace a larger flexible cable

When repairing the vibrating screen exciter cable,because its outgoing cable will bear part of the vibration force during use,it is necessary to select a more flexible cable as the lead when repairing and replacing it,and at the same time,because the lead of the vibrator is easy to break at the root Or wear and damage,so when repairing such failures,you must open the exciter and re-wiring from the inside.

2.Choose heavy-duty bearings

Heavy-duty bearings should be selected when repairing the bearings of the vibrating screen exciter,which can carry higher axial loads,and the bearing life is not affected by the axial load regardless of the installation direction.It is necessary to record the position of the eccentric block and the value of the exciting force when repairing and disassembling the bearing.After the bearing is replaced,check whether the exciter shaft has axial movement.After the operation is normal,reset the eccentric block according to the original record.High frequency dehydration vibrating screen

3.The eccentric block should be at the same angle

When adjusting and installing the eccentric block of the vibrating screen exciter,the two inner sides need to be fixed eccentric blocks,which should be kept coincident in the axial direction,and then the outer adjustable eccentric blocks on the shafts at both ends are adjusted to the same direction and adjusted to the same angle,Otherwise the motor will produce a huge staggered excitation force,and even damage the vibrating screen.

4.Do a good job of sealing the protective cover

After the vibrating screen exciter is overhauled,the protective cover of the eccentric block should be sealed to prevent materials and dust from entering the interior during the working process,thereby affecting the normal operation of the vibrating motor.

The above is the precautions for maintenance and overhaul of the vibrating screen exciter introduced by the vibrating screen manufacturer.I hope it can be helpful to everyone.If you have other related questions,you can leave a message on our website and we will reply as soon as possible.

What are the sieve methods of linear vibrating screen?

The linear vibrating screen uses a vibrating motor 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 generates data through the multi-layer screen. The oversieve and undersieve of various specifications are 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. So do you know what are the sieving methods of the linear vibrating screen? Let me explain it to you next. In the sieving process of materials, the powder sample is passed through a series of standard sieves with different sieve holes, separated into several particle grades, and weighed separately. The particle size distribution expressed as a mass percentage is called the sieve analysis method. That is, sieve analysis, the purpose of which is to determine the particle size composition of the material. There are three common screening methods; these three screening methods can roughly meet the screening requirements of users for different materials. The linear vibrating sieve analysis method can be divided into several types, such as dry sieving, wet sieving, hand sieving, dry and wet mixing, mechanical sieving, air jet sieving, acoustic sieving, panning sieving and self-organizing sieving. And so on, the results of sieve analysis often use frequency distribution and cumulative distribution to express the particle size distribution. There are many methods mentioned above, it depends on which material the user screens, so as to choose the appropriate screening method, but the more commonly used are the first three, let’s take a look together next.

1. Dry sieving method

The so-called dry sieving method, as the name implies, is to calculate the difference between the sum of the sieving balance and the bottom inventory of each sieving meter and the total dry mass m0 of the sample before sieving, as the loss during sieving, and calculate the loss rate. A certain weight of powder sample in the sieve is used to make the fine powder pass through the sieve with the help of mechanical vibration or manual tapping until the sieving is completed. The sieve residue of the powder sample is calculated according to the weight of the residue on the sieve and the weight of the sample. When determining the particle size distribution, dry sieving is generally used.

Linear Vibrating Screen
2. Wet sieve method

Put a certain weight of powder sample in the sieve and wash it for a certain period of time with a suitable dispersion water stream (with a certain water pressure), and then the sieving is complete. According to the weight of the sieve residue and the weight of the sample, the wet sieve method is used to obtain the sieve residue of the powder sample. If the sample contains more water and the particles have strong cohesiveness, wet sieving should be used (the accuracy is higher than that of dry sieving), especially for materials with finer particles. If it is allowed to mix with water, it is best to use wet sieving. . Because the wet method can prevent very fine particles from adhering to the sieve holes and blocking the sieve holes. In addition, the wet method is not affected by the material temperature and atmospheric humidity, and the wet method can also improve the operating conditions. Therefore, the wet method and the thousand method have been listed as the national standard method for the determination of the fineness of cement and raw materials.

3. Combined sieve analysis of wet and dry

Combined dry-wet sieve analysis is to combine the two methods and choose the best. When the material contains more water and mud, and the materials are bonded to each other, the combined dry-wet sieve analysis method should be used, and the results obtained by the sieve analysis are more accurate. . The specific method is to pour the sample into a fine-hole sieve and screen it in a basin containing water. Change the water in the basin every 1 to 2 minutes until the water in the basin is no longer turbid. The material on the sieve is dried and weighed, and the quality of the washed fine mud is calculated based on the difference between the weighed mass and the mass of the original sample.

The three screening methods mentioned above use simple equipment and easy operation, but the screening results are easily affected by the shape of the particles. The size of the particle size distribution is relatively coarse. When the lower limit of the test exceeds a certain value, the screening time will be reduced. Extending, it is easy to block the screen. Therefore, when screening, the particle size of the material should be adjusted as much as possible to avoid the material from blocking the screen.

How to eliminate the static electricity of the vibrating screen?

In daily life,we often encounter static electricity.Similarly,machines will also.If the vibrating screen is disturbed by static electricity,when sieving materials,due to the effect of static electricity,the materials will tend to attract each other and clump,and filter through the sieve.Decrease,which will cause difficulties for the screening work and affect work efficiency.How to eliminate the static electricity of the vibrating screen?

Method to eliminate static electricity of vibrating screen

1.Connect the ground wire on the vibrating screen to lead out the current generated on the screen.Just like common household appliances,grounding is to eliminate static electricity.

2.Measures to eliminate static electricity can be carried out on the materials.The materials can be dried,high temperature and a series of treatment measures before being screened.The degree of dryness and wetness of the materials can be mastered,so that part of the static electricity can be eliminated.

3.Antistatic agents can be added to the screening materials if conditions permit.The generation speed and duration of antistatic protection can be increased by increasing the concentration of antistatic agents.For those products that come into contact with food,antistatic agents The amount of addition must comply with relevant regulations.

4.For ordinary materials,the above three methods can be used,but when sieving fine particles,such as starch,powdered medicine,milk powder and other materials.Ultrasonic vibrating screen can be selected,which can effectively remove static electricity on the screen.Really solve the problem of strong adsorption,easy agglomeration,high static electricity,and other electrostatic screening problems,so that you will no longer be disturbed by static electricity.

The above methods can get rid of the interference of static electricity,and then improve the screening efficiency of the vibrating screen.I hope these methods can be helpful to everyone.

How to choose a vibrating screen? Six selection points

Vibrating screen is an important screening equipment in mining equipment. After the material is screened by the vibrating screen, the specifications are clearer and the quality is higher, so its work efficiency affects the benefit of the entire production line. Therefore, it is also very important to choose a suitable vibrating machine, but some novice users may not know how to choose a vibrating screen. Below, the editor of Hiside will summarize a few selection points to teach you how to choose the right one.

Choose according to material characteristics

Each material that needs to be screened has its own unique properties, so choose a vibrating screen suitable for screening the material according to the different properties of the material. These attributes include: density, shape, temperature, viscosity, particle size, mobility, particle size distribution, corrosiveness, etc. According to your different materials, you need to choose different vibrating screens. If you are not sure about this, you can ask the manufacturer’s technicians to help you.

Choose according to processing capacity

1. When the required processing capacity is small, some light linear vibrating screens are cheaper and meet the demand; when the required processing capacity is large, a steel frame is required to ensure the quality. The steel frame of the mine linear vibrating screen can meet the requirements.
2. According to the size of the vibrating screen and the rated processing capacity, select a vibrating motor or a vibrating exciter of appropriate power.
3. Choose different sieve plate angles according to the nature of the material and the processing capacity requirements.

Choose according to the structure of the screen

When selecting a vibrating screen, the screen area and number of layers, the shape, size and area rate of the screen hole, as well as the motion mode of the vibrating screen, the vibration frequency and amplitude and other factors should also be considered when selecting the vibrating screen. The screening efficiency of the vibrating screen is related to the movement form of the screen surface, so the screening efficiency of the fixed screen is relatively low, and the screening efficiency of the moving screen is relatively high. For the moving screen, the vibration of particles on the screen surface close to the vertical screen hole direction has a high vibration frequency and a better screening effect; if the particles slide in the direction of the screen surface, the screening effect is relatively poor.

Choose according to the screening purpose

According to different screening purposes, different types of vibrating screens need to be selected, such as: materials need to be pre-screened, generally linear vibrating screens; for grading and screening of crushed materials, large-scale vibrating screens, probability screens, etc.; for materials For de-intermediation and dewatering, it is better to choose a dewatering vibrating screen.

According to the production site selection

According to the customer’s production site, choose the right size vibrating screen. Technicians need to measure the site on the spot and need to ensure that the linear vibrating screen can be placed in the production line. The more basic is the length, width, and height of the vibrating screen, and the measured values ​​must be accurate, otherwise the vibrating screen produced cannot be placed on the site. The vibration motor and exciter can be placed in different places (bottom or both sides) according to the actual site conditions. In this regard, we must choose a good manufacturer, because to ensure the power of Zhenyuan, Hiside Heavy Industry has rich experience and a large number of talents in the technical department, so it is worth choosing. The excitation force produced by bad manufacturers may not meet the amplitude requirements, which affects production. In addition to the length, width, and height, different shapes of inlet and outlet must be designed according to the production line, such as round and square.

other selection elements

1. Easy to repair. Try to choose models that are easy to maintain under the same conditions. Mine vibrating screens are basically open-air operations, and the processed materials are all mineral materials. The harsh production environment is likely to cause large and small failures in the screen. The easy-to-repair screen can effectively save maintenance time and cost.
2. Parts and components. All parts and components of the selected models should be standardized and serialized. In this way, when replacing damaged parts, it can be directly replaced without modification and debugging.
3. Security. The selected mine vibrating screen model must ensure the safety of production. Safety in production is more important than Mount Tai, and you must not use unqualified models and accessories to save purchase costs or maintenance costs.

The above is an introduction on how to choose a vibrating screen. The vibrating screen is one of the indispensable equipment in the mining production line. The correct choice can help increase productivity. It can be selected according to the characteristics of the material, such as shape, particle size, density, etc.; Selection of processing capacity; selection according to the structure of the screen, such as screen area, number of layers, etc.; selection according to six aspects such as the selection of screening purposes. Choosing a vibrating screen requires a lot of experience accumulation. Heside has been engaged in the development and production of vibrating screens for many years, and has solved various problems for customers. Therefore, if you buy a linear vibrating screen, you are welcome to choose Heside.