Installation method of vibrating motor of linear vibrating screen

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The reason why the linear vibrating screen has a high screening efficiency is because of the exciting force generated by the vibrating motor. The vibration motor is equipped with a set of adjustable eccentric blocks at both ends of the rotor shaft, and the excitation force is obtained by the centrifugal force generated by the high-speed rotation of the shaft and the eccentric block.

The installation steps of the vibrating motor are very simple, as long as the bolts and the screen frame are used for fixing, but the key to installation is to choose the appropriate installation method, so what are the installation methods of the linear vibrating screen vibrating motor? Below, the editor of Hiside will introduce four installation methods.

Installation method of vibrating motor of linear vibrating screen

High frequency dehydration vibrating screen

1. Front-end installation

It is not very common to install the vibrating motor at the front end of the feed inlet of the linear vibrating screen, and many vibrating screen manufacturers will not mention this installation method because it is suitable for small linear vibrating screens. Unless the user has such special requirements, please consult the staff for details.

2. Bottom installation

Install the vibrating motor at the bottom of the linear vibrating screen. This is a relatively common installation method. For example, the width of the customer’s site is limited. In addition to the linear screening machine, there should be a certain width on both sides of the linear screen to facilitate feeding, maintenance and other operations. If the overall equipment is too wide , There will be a problem of being unable to put it down or reluctantly putting it down, but it is inconvenient to use in the future.

Of course, this problem can also be solved by reducing the overall width of the screen frame of the linear screen, but this will reduce the effective screening area of ​​the equipment, resulting in a smaller processing capacity, affecting screening efficiency and production progress, so you can choose to use the vibration motor It is installed at the bottom of the equipment to reduce the overall width of the linear screen, which ensures the effective screening area of ​​the equipment, does not affect the processing capacity and screening efficiency, and greatly reduces the overall width of the linear screen equipment.

3. Top installation

Install the vibrating motor on the top of the linear vibrating screen. This installation method is quite special. For companies that have requirements for the height and width of the discharge port of the linear screen equipment, if the height and width of the customer’s linear screen equipment outlet are restricted, the vibration motor will be installed at the bottom or on both sides. Will not be able to meet the requirements. At this time, the vibration motor can be installed in the middle of the top of the unit, so that it will not increase the width of the unit or the discharge height of the unit. This installation method is very common in heavy linear vibrating screens, such as mine screens and dewatering screens.

4. Install on both sides

This installation method is also a common method for the vibration motor of linear vibrating screen equipment. It is usually used when the customer has restrictions on the overall height of the equipment, but there is no restriction on the width of the equipment. The vibrating screen with this installation structure is again called a side-vibration linear screen. For example, due to the special requirements of some materials, the discharge port of the equipment cannot be too high from the ground. In this case, if the vibrating motor is still installed at the bottom of the linear screen, the overall height of the equipment is difficult to control.

The height of the screen box of the linear screen is usually fixed, so the height of the screen box cannot be adjusted, then the vibration motor can be installed on both sides of the linear screen instead of the bottom of the equipment, which can greatly reduce the equipment. The overall height meets the customer’s restriction requirements on the overall height of the linear screen without affecting the working efficiency of the equipment.

Arc vibrating screen

The characteristics of different installation methods of vibration motor

1. The characteristics of the vibration motor installed at the bottom of the equipment: the overall width of the linear screen is reduced, thereby ensuring the effective shielding area of ​​the equipment without affecting the output and shielding efficiency, reducing the width of the sieve machine, and saving A certain amount of space. That is safe and reliable, but also save space. However, this method will reduce the effective screening area of ​​the linear screen, reduce the processing capacity, and affect the screening efficiency and production schedule.

2. The characteristics of the vibration motor installed on the top of the equipment: a good way to effectively solve the customer’s restrictions on the height and width of the linear screen. This installation method is feasible under the condition of a certain work site.

3. The characteristics of the vibration motor installed on both sides of the equipment: the height of the linear screen is reduced. This installation method can be adopted when the material processing requires a certain restriction on the discharge opening from the ground, but the height of the linear screen is fixed.

In summary, four installation methods of linear vibrating screen vibration motors are introduced. Among them, the common installation methods are the bottom and two sides installation, while the top and front installation are special and not very common. When we choose the installation method, we can choose according to the actual situation, such as site requirements, material requirements, vibrating screen model, etc. If we cannot make a choice, we can consult the manufacturer.

Safety Operation Regulations for High Frequency Dewatering Vibrating Screen

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The safety operating procedures of the high-frequency dewatering vibrating screen should be familiar with the process flow and equipment control of the system to ensure the standard operation and regular maintenance. The vibrating screen should be overhauled once a year, and the overall parts should be carefully inspected, and the necessary parts should be checked carefully. Achieve timely replacement. Some safety operating procedures given by the vibrating screen manufacturer, I hope it will be helpful to everyone.

Instructions for safe operation of high-frequency dewatering vibrating screen

1. Must be familiar with the use range and technical performance parameters of the equipment.

2. It is necessary to have sufficient understanding and mastery of the structure, principle and common sense of maintenance of the equipment.

3. Familiar with the process flow and equipment control of this system.

The inspection before the start-up of the high-frequency dehydration vibrating screen

1. Check the area around the equipment to ensure that no people are stranded to avoid personal injury when starting up.

2. Follow the sequence of the process system to ensure that the empty screen is started and all safety equipment is in a safe and operable state.

3. Check whether the feeding and discharging chute and the chute under the screen are unblocked.

4. Check whether the sieve plate and bead bolts are loose, and the wear of the sieve plate.

5. Check whether the V-belt and flexible sheet are intact, whether the tightness is appropriate, whether there is any damage, if any, replace it in time.

6. Check the connection of the universal joint and the connecting bolt of the transition pressure plate, and whether the rubber spring is damaged.

7. The vibrating screen must be started under no load, and the material can be fed only after the amplitude is stable.

High frequency dehydration vibrating screen

Matters needing attention in the operation of high-frequency dehydration vibrating screen

1. Pay attention to check the distribution of materials on the screen and make appropriate adjustments if necessary to ensure uniform distribution of materials on the screen.

2. Observe whether the vibration frequency and amplitude of the vibrating screen are abnormal; whether the operation is stable.

3. Check the temperature of the motor, vibration exciter, and transmission bearing seat.

4. Check the vibration damping of the rubber spring.

5. Check whether there is any abnormal noise such as collision or knocking during the operation of the vibrating screen. If it is found, it must be stopped in time.

The high-frequency dehydration vibrating screen stop precautions

1. In any case, as long as a major personal and equipment accident occurs, the equipment should be stopped before contacting the centralized control room and related positions.

2. Under normal circumstances, the sequence of the process system should be followed. The vibrating screen should be stopped under no load, and it must not be stopped with materials.

3. Pay attention to the large-amplitude swing when parking to ensure the safety of the equipment, and remember to follow the safe operation regulations of the high-frequency vibrating screen.

Safe use

1. During the installation and maintenance of the exciter, there must be no hard knocks or other phenomena, to ensure that the original supporting use of the bearing is not interchangeable; the thickness and quantity of the eccentric block or counterweight plate attached to the eccentric block must be the same, and the radial direction of the bearing The clearance should be C3 level.

2. The connection of the universal joint and the exciters on both sides must be concentric, the eccentric blocks on both sides are in the free plumb position, the universal joint connecting bolts can pass through smoothly; if there is deviation during installation, check the universal joint Whether the joints at both ends are concentric, do not swing the angle of the eccentric block for installation.

3. The vibrating screen should be installed with springs with the same stiffness. The spring stiffness on both sides of the feeding end and the discharging end should be as consistent as possible, and the allowable height difference should not exceed 3mm.

4. Both sides of the support seat of the rubber spring of the vibrating screen should be in the same horizontal plane with an error between 2-4mm to ensure that the material on the screen advances evenly.

5. The safety operation regulations of high-frequency vibrating screen emphasize that after replacing the transmission belt, it is necessary to recheck whether the outer end surfaces of the two pulleys are in the same horizontal plane.

6. When using electric welding to install or disassemble parts, the ground wire must be directly fixed to the welded workpiece, and as close as possible to the welding point, and the welding current must not pass through any bearings or joints.

7. In principle, the safety operating procedures of high-frequency vibrating screens are not allowed to be welded on the side plates. If the components need to be connected according to the current environment, they should be connected with bolts after drilling holes on the side plates.

8. After the overhaul is completed or the electrical components are replaced, the steering must be checked to ensure the safe use and operation of the vibrating screen.

9. After the equipment is overhauled, the exciter must be turned by hand, and the main shaft should rotate flexibly without friction and jamming.

10. Under normal operating conditions, the bearing temperature should not exceed 45 degrees.

11. The over-resonance amplitude of the vibrating screen when it is started and stopped is 5 times the normal, and should not exceed 8 times no matter how large it is.

12. The universal coupling must be concentric, and a protective device must be installed to prevent breakage and injury.

Daily maintenance

1. Regularly check the connection parts of each bolt. It must be firm and reliable, and all bolts must not be loose.

2. Regularly check the wear and tear of the sieve plate.

3. Check the side plates and beams of the vibrating screen once a month.

4. Regularly check rubber springs, V-belts, flexible connecting pieces and universal couplings.

5. Lubricate each lubrication point and replace lubricating oil according to equipment requirements.

6. The vibrator is overhauled once a year, all the vibrators are removed for cleaning and oil change, the bearings are carefully checked individually, and can be replaced if necessary, and the safe operating procedures of the high-frequency vibrating screen are memorized to avoid unnecessary economic losses. .

How to improve the screening efficiency of the vibrating screen?

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Vibrating screens are used in the production process of mining, chemical, metallurgical and other industries. It is a sorting and grading equipment. The screening efficiency of a vibrating screen refers to the ratio of the product under the screen to the total amount of selected materials. The factors that affect the screening efficiency of the vibrating screen include material characteristics, structural parameters of the vibrating screen, and motion parameters. After understanding these influencing factors, you can learn from these On the aspect of how to improve the screening efficiency of the vibrating screen, this issue is analyzed.

1. Reasonable choice of vibrating screen

In order to improve the screening efficiency of the vibrating screen, the vibrating screen should be selected reasonably according to the needs of the site. Different types of vibrating screens have different adaptability to the materials entering the screen, and the forms of screening movement of materials on different types of vibrating screens are also different. The material is vibrated on the vibrating screen surface in a direction approximately parallel to the screen surface, and the screening effect increases as the vibration frequency of the vibrating screen increases. Therefore, when selecting a vibrating screen, a comprehensive analysis of various factors such as on-site material characteristics and target products should be carried out, and a reasonable vibrating screen should be selected to maximize the screening effect.

At the same time, on the premise of meeting the product particle size requirements, try to choose a non-metallic sieve surface with a large sieve size and a high opening rate, and choose an appropriate sieve to improve the screening effect of the material. At the same time, when selecting the screen surface, it is necessary to satisfy that the screen surface has a reasonable aspect ratio, which can improve the efficiency of the vibrating screen without affecting the screening capacity.

2. Adjust the feeding mode

If the feed is insufficient during the screening process, the ore will be unevenly distributed on the screen; if the feed is too much, the screen will be too thick, resulting in large production, blocking the screen and reducing output. For the problem of uneven feeding, a distributor can be installed at the feeding port to evenly distribute the material on the surface of the screen to meet the requirements of improving output. Distributors can be installed to ensure uniform feeding. If the distributor is added unconditionally, care should be taken when manual feeding is required to ensure uniform feeding. Feeding must be carried out along the entire width of the screen to make full use of the screen surface.

3. Reasonably select the vibration motor and adjust the excitation force

Arc vibrating screen

(1) Reasonable choice of vibration motor

As the vibration source of the vibrating screen, the motor is closely related to the working performance, movement mode and screening effect of the vibrating screen. When choosing a vibrating screen motor, choose a motor with a relatively simple structure, high vibration excitation efficiency, and easy maintenance. Increasing the excitation force of the motor can increase the amplitude of the screen surface, accelerate the movement of the material, and reduce the blocking rate of the screen hole.

(2) Adjust the exciting force

Exciting force and material penetration rate and crushing rate show wavy changes to a certain extent, so the exciting force can be adjusted appropriately within a certain range, but the setting value of the exciting force must be within the range of the motor’s synthetic exciting force , Otherwise it is easy to cause material bounce and motor damage. Various measures should be taken when adjusting the excitation force.

4. Improve the movement of the screen surface

The movement mode of the screen surface has a great influence on the working efficiency of the vibrating screen. The ideal way of sieve surface movement is:

(1) The vertical amplitude at the feed end of the screen surface should be greater than the vertical amplitude at the discharge end. This is because the large vertical amplitude at the feed end can effectively stratify the thicker materials at this end, and at the same time, with the help of the inclination angle, the excess material at this end is quickly spread to the middle of the screen surface, so that the fine-grained materials are relatively thinner. The material layer is stratified through the screen, thereby improving the actual use efficiency of the screen surface; when the material reaches the discharge end, the material has been separated into layers, then only a small vertical amplitude is required to ensure the fine-grained material There are good penetrating conditions, but too large vertical amplitude disturbs the penetrating environment of fine-grained materials.

(2) Along the length of the screen surface, starting from the feeding end, the moving speed of the material should be in a decreasing state. This is because the moving speed of the material is decreasing, so that the material layer can maintain a certain thickness on the entire screen surface, so that the fine-grained material can be layered through the screen on a relatively longer range of screen surface, increasing the actual use area of ​​the screen, and at the same time, The amount of penetration of the screen surface along the length of the screen tends to be uniform, giving full play to the screen surface’s penetration potential.

High frequency dehydration vibrating screen

5. Reasonable design of vibration parameters

According to the different materials, the vibration parameters of the vibrating screen are reasonably designed to appropriately improve the throwing degree of the vibrating screen. For materials with larger particles, high-amplitude, low-frequency vibrating screens can be used, and for fine-grained materials, small-amplitude, high-frequency vibrating screens can be used. Under the premise of meeting the screening effect, the vibration direction angle of the vibrating screen can be reduced accordingly. , Appropriately increase the inclination angle of the vibrating screen surface, which is beneficial to improve the efficiency of material screening.

6. The use of non-metallic material screen

The use of a thin elastic screen as the screen base is very beneficial to improve the working efficiency of the vibrating screen. This kind of screen is generally made of rubber or polyurethane material. It can reduce the adhesion between the screen surface and the material being screened, cause the material to produce secondary high-frequency vibration, avoid the blockage of the screen hole, and enhance the permeability of the material. It can alleviate the mechanical effect of the material to be screened on the screen surface, and can withstand greater amplitude vibration than a steel wire screen.

The above is the answer to how to improve the screening efficiency of the vibrating screen, which can be improved by reasonable selection of the vibrating screen, adjustment of the feed mode, reasonable selection of the vibrating motor and adjustment of the exciting force. Improving the screening efficiency of the vibrating screen is conducive to improving the overall production yield, and also has an important impact on subsequent operations.