Precautions for maintenance and overhaul of vibrating screen exciter

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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?

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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 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?

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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

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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.

What should be paid attention to when selecting vibrating screen accessories?

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Vibrating screen is a mechanical equipment used for screening, filtering, and impurity removal, and the quality of a piece of equipment is determined by the quality of its related accessories in addition to the design and production problems. So what should users pay attention to when choosing vibrating screen accessories? Vibrating screen accessories include: vibrating motor, damping spring, bearing, sealing tape, screen, and cleaning device. When selecting, you need to choose according to production materials and production requirements. The following points need to be paid attention to when choosing vibrating screen accessories.

1. Vibration motor
As the power source of the vibrating screen, the greater the power of the motor, the higher the output and screening accuracy of the equipment. However, the power of the vibrating motor configured for different types of vibrating screens is also different, so it should be selected reasonably. On the other hand, vibration motors can be divided into two types: ordinary and explosion-proof. If the production environment or materials cannot have open flames or overheating, please use explosion-proof vibration motors.

2. Damping spring
The damping spring can not only reduce the resonance of the equipment, but also play a role in connecting the base and the screen frame. The damping spring can be divided into steel springs, composite springs, and rubber springs. The damping springs used by different types of equipment are also different. So please make a reasonable choice when choosing.

3. Bearing
The bearing is an important component linking the vibrating motor and the screen frame, and is the component that realizes the vibration of the screen frame. The selection of bearings can be divided into domestic bearings and imported bearings. The price of imported bearings will be higher than that of domestic ones, but both quality and noise Better than domestic bearings. Therefore, please choose according to actual production requirements when selecting;

NE Series Vibrating Screen Exciter

 

4. Sealing tape
Nowadays, vibrating screen manufacturers generally use silicone sealing strips. When selecting, please choose the corresponding sealing strips reasonably according to the diameter of the screen frame;

5. Screen
For the parts directly in contact with the material, the quality of the screen determines the output and screening accuracy. The screen can be divided into metal woven mesh and perforated plate. When screening small particles, powder, and slurry materials, metal can be used. Woven screen, if the material diameter is larger, you can choose perforated screen.

6. Net cleaning device
When the vibrating screen is produced due to the shape of the material, it will be embedded in the mesh and block the mesh. This requires the use of a mesh cleaning device for cleaning. Net cleaning devices include: bouncing ball cleaning device and ultrasonic cleaning device. The bouncing ball cleaning device is more commonly used. The material is silica gel. After the device is started, the bouncing ball receives the vibration of the equipment’s exciting force and hits the screen surface to achieve the net cleaning effect. It can clean up the blocking problem of materials below 200 mesh. Ultrasonic net cleaning device is a new type of net cleaning equipment. The screen surface material is floated by high-frequency and low-amplitude ultrasonic waves to achieve the net cleaning effect. The ultrasonic net cleaning device can clean up problems such as blocking, sticking, adsorption, and theater troupes of materials below 500 mesh.

The above are some of the issues that need to be paid attention to when selecting vibrating screen accessories. A high-quality vibrating screening equipment needs good accessories for auxiliary work, so that the performance of the equipment can reach the ideal state.

How to reduce the noise of the vibrating screen? Introduction to noise reduction methods

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As a kind of mining machinery,the vibrating screen will inevitably produce various mechanical noises during operation.Of course,in addition to the normal mechanical noise,there are also some abnormal noises.How can the vibrating screen reduce noise?Here is a list of noise reduction methods for vibrating screens for your reference.

Solution to abnormal noise of vibrating screen

When the vibrating screen is in operation,once there is an abnormal sound,it should be shut down for inspection immediately to avoid damage to other parts of the screen,or even the production line is stopped.Generally,the inspection can be started from the following aspects:

1.The transportation support of the vibrating screen has not been removed,and the transportation support should be removed immediately.

2.If the ring bolt is not locked or the ring is not fully fitted,immediately tighten the nut or lock the copper nut,and hit the ring with a wooden hammer.

3.The foundation of the vibrating screen is uneven,so the foundation should be stabilized.A rubber plate on the base of the vibrating screen is better.

4.The vibrating screen spring is broken or dislocated,replace the spring or reset.

5.The vibrating screen body and the discharge port are in contact with hard objects,and the space between them is greater than 0.5 meters.

6.If the fastening bolts of the vibration motor are loose,immediately tighten the bolts of the vibration motor.

7.The connection of the feed port and the discharge port of the vibrating screen cannot be rigid connection,but flexible or cloth bag connection.

8.If the vibrating screen bearing is damaged,stop and replace it immediately.

9.If the vibrating screen beam is broken,it should be shut down immediately for maintenance and replacement.High frequency dehydration vibrating screen

Vibrating screen noise reduction measures

1.Replace the perforated steel screen with a polyurethane screen or rubber screen with small elastic modulus and low impact noise;

2.Use rubber springs instead of steel springs to reduce impact;install a soft sound insulation cover outside of the exciter;

3.Fasten all parts on the vibrating screen,especially the screen plate that needs to be replaced frequently,to avoid additional vibration caused by the loosening of individual parts;

4.Apply damping treatment between the inner and outer shells of the vibrating screen bearing.The rolling elements of the bearing can be made into hollow rolling elements or damping materials can be added to the hollow rolling elements,which can reduce the vibration of the bearing and reduce the noise of the bearing;

5.Rubber plates are added to the side plates of the screen box,the feeding port,the discharge port and the receiving chassis,which can effectively suppress the high-frequency vibration of the side plates of the vibrating screen and reduce the radiation noise;

6.Use flexible web gears instead of steel gears,and use rubber elastic bodies to transmit torque on the webs of the gears to absorb vibrations caused by gears meshing in and out.

Regarding how to reduce the noise of the vibrating screen,the above is the entire content for everyone.I hope it can be helpful to everyone.It should be noted that when dealing with the abnormal noise of the vibrating screen,it should be carried out in a shutdown state to avoid danger.

What should I do if the sound of the vibrating screen is loud?

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Vibrating screen is a kind of heavy-duty screening equipment, which has the characteristics of large output, simple structure and long service life. However, it not only produces mechanical noise during operation, but the noise produced by the vibrating screen is unavoidable. It also produces a large amount of dust due to the screening, transportation and mutual impact of ore, which seriously pollutes the working environment. So what should I do if the sound of the vibrating screen is loud? Here are some measures to deal with loud noises.

Measures to deal with the loud noise of the vibrating screen

1. Use bearings with higher precision
The vibration produced during the operation of the bearing includes two aspects: one is the structure, the rolling elements cause a small change in the position of the axis through the compound action, which causes vibration; the other is the manufacturing, the rolling elements, inner and outer rings, The geometric error of the cage after rolling will cause vibration. Load, speed, lubrication and working clearance will affect the vibration of the bearing to varying degrees. Therefore, when selecting the bearing, it is necessary to meet the conditions of bearing life, and secondly, it is necessary to use smaller and higher-precision bearings as much as possible.

2. Polyurethane sieve plate replaces metal sieve plate
Because polyurethane material has small elastic modulus and large internal resistance, switching to polyurethane screen can effectively reduce noise. According to the information, as far as the screen itself is concerned, under the same excitation conditions, the noise of the polyurethane screen can be 15-20dB(A) lower than that of the ordinary metal screen. However, since the noise of the side panels and other components has not yet been reduced, in actual use, the overall noise of the vibrating screen can be reduced by 5dB(A).

3. Add constrained damping layer to the side plate of the screen box
The side plate and rear end plate of the screen box are all made of thin plates by welding or riveting. These large-area thin plates will radiate strong noise under the action of exciting force. The size of the radiated noise of the plate surface is related to the plate surface. The vibration speed is proportional to the square, and for this reason, constrained damping materials can be applied to the board surface to achieve the purpose of noise reduction.

High frequency dehydration vibrating screen

4. Use flexible spoke gears instead
In the vibration process, gear noise is also a noise source that is worthy of attention due to the meshing of gears. Synchronous gears used in general vibrating screens work in a strong vibration environment. Because of the greater impact of biting and biting, the impact noise is also higher. Due to the large internal resistance and large elastic deformation of rubber, it can not only reduce the impact of biting and biting, but also absorb more vibration energy. Therefore, flexible spoke gears can be used to achieve the purpose of noise reduction.

5. Use rubber springs instead
During the vibration, relative sliding occurs between the end of the spring and the support. Because it is dry friction, the frequency of friction noise is high and the sound is loud, so that the local noise at the position of the vibrating screen spring is significantly increased. After the rubber spring is used, part of the noise can be significantly reduced.

6, chute with rubber liner
The vibrating screen has an inlet chute and a discharging chute. The chute is welded with steel plates. The collision and friction of the material in the chute will also affect the noise of the vibrating screen. For this reason, rubber is laid on the inner wall of the feeding and discharging chute. The liner can also reduce the noise of the chute.

7. Regularly check the looseness of equipment parts
Attention should be paid to whether the noise is caused by the loosening of equipment parts. Therefore, to reduce the noise, all parts on the vibrating screen must be tightened first, especially the screen plate that needs to be replaced frequently, to avoid additional vibration caused by the loosening of individual parts.

How to cool down the vibrating screen?

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When the vibrating screen is in operation,the temperature generally cannot exceed 40 degrees.Once it exceeds 40 degrees,various failures are prone to occur.However,summer is basically hot weather,which makes the vibrating screen unable to work normally,so how to cool the vibrating screen?

1.Avoid direct sunlight

The vibrating screen is generally outdoors.Long-term exposure will not only make the machine easy to wear and aging,but also make the entire vibrating screen equipment too hot and unable to work normally.

Solution:For vibrating screens that work outdoors,you can build sunscreens or awnings to avoid direct sunlight.High frequency dehydration vibrating screen

2.Improve the indoor environment

Although there is no direct sunlight,the vibrating screening equipment that works indoors or mines cannot be ventilated,which leads to an increase in the indoor temperature,which eventually increases the temperature of the vibrating screen.

Solution:For vibrating screening equipment working indoors or in kilns,attention should be paid to the adjustment of indoor temperature,as well as ventilation and air permeability.The ambient temperature generally does not exceed 40°C,which provides a good working environment for the vibrating screen.

3.Reduce equipment heating

The high temperature of the vibrating screening equipment is partly related to the high temperature of the vibrating motor.Too high temperature will cause aging and shorten the life of the motor.

Solution:The temperature of each part of the vibration motor winding and other parts is restricted from time to time,which is to limit the allowable temperature of the vibration motor.

The high temperature of the vibrating screen not only affects the screening effect and production capacity,but also seriously affects the service life of the vibrating screen.To extend the service life of the equipment,the operator can carry out daily maintenance and maintenance of the vibrating screen.At the same time,when choosing a vibrating screen motor,the user must choose a motor of the appropriate power.Don’t choose a motor that is too small because it is cheap,which will eventually cause the motor to run under load,resulting in excessive temperature and shortening the life of the vibrating screen.

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.