Installation steps, debugging and precautions of vibrating screen exciter

A vibration exciter must be installed on the mine vibrating screen equipment to realize the screening of materials. The vibrating screen exciter is a device used to generate the exciting force, which can make the object to be excited obtain a certain form and magnitude of vibration, thereby vibrating the object. In addition to providing exciting force, the exciter also determines the vibration frequency and amplitude of the vibrating screen. Therefore, the correct installation of the vibration exciter is very important. Below, the editor of Hiside will talk about the installation steps and debugging of the vibrating screen exciter.

Installation steps of vibrating screen exciter

DVE4.1

1. Before installing the vibrating screen exciter, first refer to the packing list to check whether the parts are complete and damaged.

2. Refer to the installation drawing for installation. The supporting frame must be installed horizontally on the foundation. The foundation should have sufficient rigidity and strength to support all the dynamic and static loads of the vibrating screen.

3. The screen box trunnion can be used to lift the sieve machine, and the whole sieve cannot be directly hung on the exciter. Lift the exciter to the installation position, and use the bolts to locate at four points symmetrically. Install the exciter anchor bolts, and Preload.

4. When installing the vibration exciter, ensure that there is a 75mm gap between the screen box and non-moving parts such as hoppers and troughs.

5. Remove the spreader before tightening the anchor bolts, tighten the exciter anchor bolts diagonally with a torque wrench, and tighten the anchor bolts to a fixed torque.

6. Install the coupling and the protective cover, keep the eccentric block installed in a natural state, and install the vibration exciter and the coupling protective cover in turn. The installation must be firm and reliable.

7. Fill the exciter with lubricating oil, and the grease and oil level meet the requirements.

8. Clean up the scene. Count tools, materials, accessories, and debris on site. The site should be tidy and clean. Then began the debugging work of the vibrating screen exciter.

Debugging steps of vibrating screen exciter

JR608

1. The exciter must be rotated by hand (or other methods) before the test run. The machine can be started only when the rotation is flexible and there is no jamming phenomenon.

2. When debugging, adjust the excitation force, first remove the wind shield. Loosen the counterweight fastening bolts, adjust the eccentric block and counterweight of the exciter at the same phase and angle, or increase or decrease the number of counterweights, tighten the bolts, and reinstall the air hood. Adjust the size of the exciting force to meet the needs of different materials or processing capacity of various vibration equipment.

3. The exciter has no abnormal noise, no leakage, and the bearing temperature rise does not exceed 75 degrees Celsius.

4. The trajectory of the vibrating screen is a straight line, the amplitude difference of the four points is less than 2 mm, and the angle difference of the four points is less than 2 degrees.

Precautions for installation and debugging of vibrating screen exciter

DF401S

1. When hoisting the vibrating screen exciter, don’t bump it when transferring or installing it.

2. Do not disassemble parts and components at will during installation. When installing, check whether the anchor bolt holes are consistent with the bottom plate bolt holes.

3. After the seat type vibration exciter is installed, it should be horizontal horizontally and symmetrical to the center line of the screen body.

4. Turn on the machine for a short time and check whether the working direction of the exciter meets the requirements (the two shafts of the exciter should rotate in opposite directions).

5. The anchor bolts should use strength bolts and take anti-loosening measures to prevent damage to the exciter.

6. The thin oil lubrication exciter needs to open the cooler to supply oil first, check whether the oil circuit is dredged, whether there is oil leakage, and start the test run when the oil return pipe starts to return oil.

7. Do not disassemble parts at will during installation. After installation, the exciter should be horizontal.

8. The bolts connecting the exciter and the screen box are high-strength bolts, which are not allowed to be replaced by ordinary bolts. The tightness must be checked regularly and once a month. The loosening of any one of the bolts will also cause other bolts to be cut, causing damage to the screen machine.

In summary, the installation procedure of the vibrating screen exciter is to first check whether the parts are complete, then lift the exciter to the installation position, install and pre-tighten the anchor bolts, and tighten the anchor bolts to a fixed specified torque. Add lubricating oil. Because of the exciting force of the vibrator, the vibrating screen can run smoothly without swinging and twisting, and produce low noise.

What happens to the uneven feeding of the vibrating screen? Affect screening efficiency

When using a vibrating screen to screen materials, we have repeatedly warned users and friends that the feeding should be uniform. Many users and friends may disagree, thinking that no matter what feeding method, the material will enter the equipment anyway, so we ignore the feeding problem. The idea is actually wrong. The uniformity of feeding has a great influence on the screening work of the vibrating screen. What happens to the uneven feeding of the vibrating screen? Next, the editor of Hiside will talk to everyone about the impact of uneven feeding.

The impact of uneven feeding of vibrating screen

Banana screen

1. Affect the service life of the screen

If the vibrating screen is fed unevenly, the screen will be damaged quickly and reduce the service life of the screen. Because if the feeding is uneven, there may be too much material at one time, which will exceed the working pressure that the screen can withstand, and the screen will also be weighed because of the weight of too much material, which will cause The screen surface is damaged faster.

2. Affect the output and accuracy

The uneven feeding of the vibrating screen will also affect the output and screening accuracy, which is also caused by the previous effect. Because the screen is damaged, the screen must be replaced, which in turn affects the output and screening accuracy. If this is the case for a long time, it will not only affect normal production but also increase equipment maintenance costs.

Another aspect that affects output and accuracy is reflected in the fact that when the feeding is uneven, there will be a phenomenon that there is material on one side of the screen surface and the other side is not. This will reduce the utilization rate of the overall screen surface and cause the output to fail to meet the requirements. . On the other hand, due to uneven feeding, it will be a problem of excessive accumulation of materials on one side. Once the accumulation of materials is too thick, it will affect the screening accuracy and output.

3. Affect the service life of the motor

When the vibrating screen is used, the uneven feeding or excessive feeding at one time in the production process will increase the load of the screen and the load of the motor, which will damage the vibrating motor and reduce the service life of the motor. Users are required to continuously maintain or replace the motors to increase equipment maintenance costs.

4. Affect the efficiency of screening

When using the vibrating screen, the uneven feeding will also affect the screening efficiency. If too much material is fed at a time, the screening load that the vibrating screen can bear will be exceeded, causing the material to be discharged from the discharge port before it has time to be screened, resulting in overfeeding. Too much fine material is discharged from the coarse material port, which will greatly reduce the screening efficiency.

The method of uniform feeding of vibrating screen

Arc vibrating screen

1. First, choose a reliable screen when choosing a vibrating screen.

2. Frequently check the tension of the screen surface and check whether the screen is compacted.

3. When there is strong impact force, a hopper or buffer can be added to the vibrating screen.

4. If there is material accumulation, find out the reason as soon as possible, such as adjusting the eccentric block of the vibration motor.

5. Carefully read the instruction manual of the ultrasonic vibrating screen, and feed the material strictly according to the processing capacity of the screen. If you need to increase the production capacity, you can find the vibrating screen manufacturer to further modify the screen machine.

6. The use of an automatic feeding system, that is, spiral feeding or bucket lifting, belts and other lifting and conveying devices for automatic feeding, not only solves the consequences of uneven feeding, but also improves the cost of the workshop.

The precautions of vibrating screen feeding

High frequency dehydration vibrating screen

1. Avoid too much feeding at one time

When feeding the vibrating screen, care should be taken to avoid excessive feeding at one time. A large amount of one-time feeding that exceeds the carrying capacity of the screen will cause the screen to become fatigued and loose, and severely damage the screen and affect the screening effect. When the vibrating screen is shipped from the factory, the vibrating motor and screen are matched according to user requirements. For example, one-time feeding will increase the load of the vibrating motor and reduce the life of the vibrating motor. The screening efficiency of the screen will also be greatly reduced.

2. Avoid large impact when feeding

Avoid large impact when feeding. This is also what the vibrating screen should pay attention to when feeding. The impact force of the one-time feeding will seriously affect the tension of the screen, and the loosening of the screen will affect the screening efficiency. Relatively, it will seriously affect the life of the screen plate. It is recommended to communicate clearly with the vibrating screen manufacturer when ordering a vibrating screen. A buffer hopper can be installed if the impact force of the feed is large.

The above is the answer about the uneven feeding of the vibrating screen. It can be seen that the uneven feeding will affect the service life of the vibrating screen, causing rapid damage to the screen, which in turn reduces the output and screening accuracy, and affects the service life of the motor. Affect the screening efficiency. These effects will increase the maintenance cost of the equipment, which is not conducive to stable production. Therefore, uniform feeding is very important. When feeding, it is necessary to avoid excessive investment or high impact at one time. If you need high-quality vibrating screen equipment such as banana vibrating screen and linear vibrating screen, please contact Hiside for detailed inquiry~

 

How to extend the service life of the vibrating screen?

In the mining industry, the work task of the vibrating screen is still very important. It is necessary to screen the materials on the entire production line, and its processing capacity is large, and the screening effect is good. It is also indispensable screening equipment in many other industries. When we use vibrating screen equipment, of course we hope that the equipment can be used for a long time. This is also inseparable from the service life of the equipment, so how to extend the service life of the vibrating screen? Below, the vibrating screen manufacturer gave us the following specific introduction on how to extend the service life of the vibrating screen.

1. Install the vibrating screen correctly

The correct installation of the vibrating screen will help to extend the service life of the equipment. Before, we also specifically talked about how to install and debug the vibrating screen. One of the more important is the installation of the vibration motor. Heavier eccentric blocks are installed at both ends of the vibrating motor. During operation, we can control the excitation force by adjusting the number of eccentric blocks of the vibrating screen. However, due to the heavier eccentric blocks, such as vertical or inclined installation, The bearing has to bear the weight of the eccentric block in the axial direction, which will greatly affect the service life of the bearing. Therefore, when we do not require it, we generally recommend to choose a vertical vibration motor and try to avoid vertical or inclined installation.

2. Keep the vibrating screen stable

Maintain the stability of the vibrating screen equipment during use. Because the proportion of materials handled by the vibrating screen equipment is relatively large, and the work intensity is relatively high, various failure problems may occur during operation. If a failure problem occurs, it must be consuming the life of the vibrating screen. Therefore, the stability of the equipment must be maintained, which is also conducive to prolonging the service life.

Linear Vibrating Screen

3. Maintain the symmetrical balance of the eccentric block

When adjusting the eccentric blocks on both sides of the vibration motor, pay attention to the symmetry as much as possible, that is, the eccentric blocks at both ends should correspond to each other, or the connecting line of the eccentric blocks at both ends should be parallel to the axis of rotation and cannot be different planes. Otherwise, it is easy to make the vibrating screen unstable during operation, which may cause damage or burnout of the vibrating motor.

4. Dust the vibrating screen

Since the working environment of the vibrating screen is mostly harsh and dusty, if the vibrating screen equipment is operated in an open-air environment or in an environment where the protective cover is not tightly sealed, it is easy to get dust and cause the eccentric block to run by friction, thereby burning the motor. Therefore, in places where the working environment is harsh, firstly, increase the sealing of the protective cover, and secondly, frequently clean the dust inside the protective cover. This can also extend the service life of the vibrating screen.

5. Heat dissipation of the vibration motor

The bearing or main parts of the vibration motor are easily burned or burned when the temperature is too high under operation or abnormal operation. We can often vibrate the surface of the motor by vibrating the dust on the motor surface to make it work in good conditions. When working in a large environment, consider subtracting the heat dissipation ribs on the surface of the case. In addition, the equipment can be shut down to dissipate heat after operation.

Arc vibrating screen

6. The vibrating screen feeds uniformly

The vibrating screen is a continuous operation equipment, so the vibrating screen equipment needs continuous feeding. If you use too much during feeding, materials will accumulate on the vibrating screen, which will cause the vibrating screen to loosen and reduce fatigue. Due to the high screening efficiency, the equipment itself also increases the work load and damages the vibrating motor, so it is uniform Ground conveying vibrating screen is very important.

7. The material on the sieve surface is sieved cleanly

When the equipment stops production, the material on the screen surface should be sieved clean. After the production is completed, the screen surface materials should be completely screened before the shutdown is performed. This is because the residual materials in the screen surface and the screen body will corrode the linear screen frame and the screen and affect the service life.

8. Regular maintenance of the vibrating screen

Regular maintenance and maintenance of the vibrating screen is also very conducive to prolonging the service life of the vibrating screen. General maintenance is divided into weekly inspection, monthly inspection and annual inspection. The annual inspection is to overhaul the vibrating screen and disassemble the vibrating screen for cleaning. Maintenance also includes regular maintenance and daily maintenance. Regularly check whether the coarse mesh, fine mesh and spring are fatigued and damaged, and whether various parts of the fuselage are damaged due to vibration, and the parts that need to be lubricated must be lubricated.

High frequency dehydration vibrating screen

9. Choose high-quality vibrating screen

The quality of the vibrating screen directly determines the service life of the screen. Many people buy poor quality vibrating screens at increasingly cheaper prices. This is not conducive to production. It is also possible that some unconscionable manufacturers will install bad parts on other vibrating screen equipment and sell them at a low price. This will not only have a low equipment life, but also affect production and safety. There are great negative effects.

10. Handover work must be in place

The production of some enterprises is assembly line operation, and the screening machine works 24 hours a day. This requires the operator to make a record of the shift during the shift, record the output of the screening machine during use, the problems encountered during use and the solutions Wait. This can provide a good review for the next shift and targeted maintenance and observation.

The above is the answer to how to extend the service life of the vibrating screen. In general, there are correct installation of the vibrating screen, maintaining the stability of the vibrating screen, maintaining the symmetrical balance of the eccentric mass, and removing dust from the vibrating screen. The ten measures introduced can effectively extend the service life of the vibrating screen.

Application of Banana Vibrating Screen in Coal Preparation Plant

Banana vibrating screen is a new type of vibrating screen applied to the screening and processing of large quantities of materials. It introduces its theoretical characteristics, development process, high efficiency and application effect in coal preparation plants. It is an ideal alternative to traditional inclined horizontal screens. , Is the development direction of vibrating screen in the future.

In the coal preparation industry, the vibrating screen is a widely used equipment for classification, dehydration, de-intermediation, and desliming. It is also a key screening equipment. The quality and efficiency of coal.

Banana screen

In order to improve production capacity and production efficiency, it is necessary to choose a high-performance vibrating screen to replace the traditional inclined horizontal screen. The banana vibrating screen, which is used in the screening and processing of large quantities of materials, is the choice.

Banana vibrating screen can be used for dry or wet sieving. So far, such screens have single-layer and double-layer structures. Compared with the traditional screen, the advantage of the banana vibrating screen is that it can handle a larger screening volume without taking up more space than other screening machines of the same size. For coal preparation plants that need to increase the sieve weight in the process of technological transformation, due to the constraints of site space conditions and unable to use larger sieves, the use of banana vibrating sieves can just solve this type of problem.

Arc vibrating screen

With the current major changes in coal washing technology and the booming coal market, a large number of coal preparation plants with backward production processes need to be transformed. How to install screening equipment with large processing capacity and high screening efficiency in existing plants is a key issue.

In the limited on-site space, the use of banana vibrating screens can successfully solve the problem of “cannot use larger screens but increase the screen weight”. It is a very good choice for screening equipment in the technical transformation of coal preparation plants. Moreover, the banana vibrating screen is undergoing further development in the washing industry, gradually extending to the application of desliming and media recovery.