Как поддерживать линейный вибрационный грохот на углеобогатительной фабрике

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Линейные вибрационные грохоты обычно используются для обезвоживания и обезвоживания на углеобогатительных фабриках. Они в основном используются для операций по обезвоживанию и обезвоживанию на углеобогатительных фабриках.

There are many types of structure and transmission methods for linear vibrating screens, such as flexible connection, universal joint shaft connection, etc. The excitation methods include eccentric sliders, box-type vibration exciters and other forms. This article mainly introduces the current compact structure Regular operation and maintenance of linear vibrating screen in the form of box-type vibration exciter.

Новости

1. Main components of linear vibrating screen

1. Screen body: usually adopt ring-groove rivets to clean and seal assembly to avoid the corrosion of the bolt joint surface by wet objects. At the same time, the side panels are assembled without welding seams and rivets hydraulically to ensure that the overall structure has no residual stress.

2. Vibration beam: usually a box-shaped design, the main welds are fully penetrated, first-level UT inspection and magnetic particle inspection, and heat treatment to eliminate welding stress to ensure high strength. Before assembling, the mating surface of the excitation beam is precisely processed by CNC machine tools, which effectively guarantees the overall assembly quality of the screen.

3. Crossbeam: Usually circular special pipe design is adopted, and the main welds are all penetrated. First-level UT inspection and magnetic particle inspection are carried out, and heat treatment is carried out to eliminate welding stress and ensure strength. The surface can be treated with polyurethane spraying process to improve erosion and corrosion resistance.

4. Vibration exciter: It is composed of special vibration bearing, eccentric pendulum block, magnetic oil plug and other components, and uses splash lubrication to excite. The exciter can work normally under the temperature of -30℃~+80℃, usually with special respirator.

5. Intermediate shaft: Use an intermediate shaft to connect between the two exciters to ensure the synchronous rotation of the left and right exciters. Both ends of the intermediate shaft are connected with the pendulum block of the vibration exciter by a unique elastic rubber disc coupling. The intermediate shaft is a rigid shaft, maintenance-free and without lubrication.

6. ​​Main drive shaft: The main drive shaft is a universal joint shaft that connects the statically fixed installation drive mechanism and the dynamic vibrating screen body.

7. Drive mechanism: The drive mechanism is composed of a motor, a belt drive and a countershaft assembly. The main motor has a large starting torque and fast acceleration, so that the screen machine quickly passes through the resonance zone. The motor is installed on the rail seat to facilitate belt tensioning. The transmission mechanism adopts belt drive to adjust speed and reduce speed, transmit power, and adjust the belt tension with guide rail seat screw tension motor. The countershaft assembly is composed of a countershaft, a bearing, an adapter sleeve, a labyrinth seal and an open bearing seat.

8. Cushioning spring: steel coil spring is used for vibration isolation and cushioning between the vibrating screen body and the installation base. The spring stiffness is small, which reduces the dynamic load on the base. Rubber pads are added at both ends of the spring to reduce the friction and friction noise between the spring and the steel spring seat plate.

9. Screen surface: According to the purpose and user needs, the screen surface adopts different types of sieve plates. The main types are: continuous sieve slotted polyurethane sieve plate, polyurethane frame stainless steel slotted sieve plate, polyurethane frame stainless steel woven sieve plate, polyurethane frame stainless steel punch Hole sieve plate.

2. The operating procedures of the linear dewatering screen:

1. Before driving, check carefully whether the sieve plate is damaged, loose, whether the eccentric shaft bolt is loose, whether there is any debris on the screen surface, whether the chute is unblocked, the water spray device is intact, and no one is working on the equipment.

2. The screen surface should be flat, free from damage or looseness, and the joints should be tight. The sieve holes and sieve slits of the deintermediation sieve should not be too large, small, or excessively worn.

3. The exciter, vibration motor and other lubrication parts should be well lubricated; the support spring should be free from damage, lack and aging failure; all safety facilities should be complete and intact, and comply with relevant regulations.

4. Try to drive without load; the sieve that needs to be sprayed with water should not be blocked, otherwise it should be cleaned immediately.

Three, the start and stop sequence of the linear dewatering screen:

Start sequence:

1. The inspection before the start of the separation screen is completed, and the shift leader or production dispatcher has been given a driving instruction to confirm that the equipment in the next process has been started and operating normally before starting the screen.

2. After the sieve is started, first turn on the water spray and confirm that it is normal before allowing the material to be fed to the screen surface. Adjust the water spray size in time according to the material on the screen surface.

3. After the start-up is completed, perform a comprehensive inspection and make a record of the shift.

parking sequence

1. You must get a parking instruction before you can stop.

2. It must be known that the equipment in the previous process has indeed been stopped.

3. Before stopping, all materials on the screen must be unloaded, and then shut down after turning off the water spray.

Four, operation and maintenance

1. Check the incoming materials, discharge and spray pipes regularly during operation, and report them if they are blocked.

2. Frequently monitor the eccentric shaft, whether the sound is normal, whether the sieve plate is loose, whether there is water running on the sieve surface, report and deal with it in time.

3. During operation, pay attention to check the temperature of each bearing, the temperature of the motor, the sound, the working state of the coupling and the amplitude of the screen under different loads, and report the problem in time.

4. The screen box should vibrate smoothly during operation, and there should be no abnormal swings. If the screen box shakes, check the working conditions of the four support springs and the running direction of the motor.

5. Pay attention to the working conditions of the exciter and the vibration motor during operation. The spindle should rotate flexibly and the bearing should be well lubricated; pay close attention to the bearing temperature.

6. ​​The vibrating screen should regularly check the concentration and particle size composition of the water under the screen to determine the wear of the screen. If the wear is serious, it should be replaced in time.

7. The de-intermediation vibrating screen should adjust the pressure and water volume of the water spray to ensure that the heavy medium of the product on the screen is flushed; often check (see, touch by hand) the de-intermediation effect and moisture of the product on the screen, and adjust according to the inspection result The amount of water sprayed can improve its cleaning effect; closely contact the density control driver to jointly adjust and ensure the deintermediation effect and dehydration effect of the deintermediation screen.

8. The technical indicators of de-intermediation and dewatering include: unit consumption of water spray, concentration of under-sieve and super-grain content, product on-screen and moisture. The driver should strive to complete the above-mentioned indicators stipulated by the factory.

Five, the main measures to complete the index of removal of referral and dehydration

1. In order to strengthen the maintenance of the equipment, keep the vibrating screen in a good working condition; clean the nozzles frequently to ensure uniform spraying; strengthen the management of the screen surface and observe the dynamics during operation. After parking, check frequently, clean up frequently, fill loopholes frequently, and clear blockage frequently to ensure the effective separation (water) area of ​​the screen surface.

2. It is strictly forbidden to put the scattered coal into the funnel under the sieve; it is strictly forbidden to run without water.

3. Regularly check, adjust and replace the coupling and support spring; clean the screen surface and chute; check the tightness of the screen surface, and deal with it if it is loose.

4. Используйте время стоянки для обслуживания оборудования и устранения проблем, возникающих во время работы, и проверки после парковки.

5. Хорошо поработайте с оборудованием и очисткой окружающей среды, заполняйте рабочий журнал по мере необходимости и хорошо меняйте смены.

Как настроить частоту вибрации вибрирующего экрана

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Как мы все знаем, работа вибросита неотделима от вибродвигателя. Вибрационный грохот приводится в движение вибродвигателем. Частота вибрации зависит от скорости вибромотора. Скорость вибрирующего грохота уменьшается или передаточное число системы трансмиссии увеличивается. Большой, может снизить частоту вибрации вибрирующего экрана. Точно так же, увеличивая скорость вращения вибрирующего двигателя или увеличивая коэффициент ускорения системы трансмиссии, можно увеличить частоту вибрации линейного вибрирующего экрана.

Конкретные этапы работы: Откройте торцевую крышку на одном конце вибрационного двигателя на вибросите. Внутри есть кулачок, а вверху шкала. Частота может быть достигнута регулировкой количества кулачков.

There are many different classification methods for vibrating screens. For example, according to the movement trajectory, there are linear screens, circular screens and high frequency screens. So no matter what kind of vibrating screen, you have to buy it back. If we encounter the problem of slow discharge, how can we solve it?

The vibrating screen is a machine that uses a vibration exciter or a vibrating motor to drive the screen surface to perform high-frequency vibration, so as to screen materials and have the characteristics of high precision and high efficiency.

The vibrating screen discharges slowly or does not discharge, I believe most users have encountered it, so many users first feel that this is a problem with the machine, it must be designed by the manufacturer without designing, and in fact, this phenomenon is very common, and There are very easy to solve problems, because the root cause of these problems is the vibration source of the vibrating screen.

It is not difficult to find the root cause, and then solve the problem of slower discharge of the vibrating screen, that is, adjust the weight of the upper and lower ends of the vibrating motor. You can start from two aspects:

1. Increase the weight of two weights: increasing the weight of the eccentric mass can increase the excitation force of the entire machine. Users can increase the weight according to the number of layers of the vibrating screen and the specific gravity of the material, so the vibrating screen and the material can achieve the desired ideal effect.

2. Change the angle between the upper and lower weights: the angle of the weight changes, the movement trajectory and residence time of the material on the screen will change. The larger the angle, the smaller the eccentric force generated, and the longer the material is on the screen. The finer the screen, the slower the discharge speed. Conversely, the smaller the angle, the greater the eccentricity, and the shorter the residence time of the material. Accordingly, the discharge speed will increase. This type of adjustment is more suitable for coarse drying and screening of larger particles. Therefore, the user should adjust the angle between the two weights according to the nature of the material to be screened, so that the distribution of the material, the processing capacity and the super-netting speed can reach the ideal screening state.

При производстве и проектировании однотипного вибросита определяется настройка. Для разных материалов требуются разные методы регулировки. Пользователи могут регулировать угол наклона молота в соответствии со своими потребностями. Вибрационный грохот находится в идеальном рабочем состоянии.

Общие проблемы и решения вибровозбудителя

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Просеивающее оборудование — важное вспомогательное оборудование в горнодобывающей, строительной, химической и других отраслях промышленности. Его производительность напрямую влияет на производственные мощности и технико-экономические показатели. Следовательно, очень важно понимать некоторые распространенные неисправности и способы решения проблем с виброситами в производственной практике. В этой статье рассказывается об общих проблемах вибровозбудителей, основных причинах и способах устранения трещин и деформации рамы экрана и боковых пластин.

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

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

Виброгрохот серии FE (HE)

1. Start under heavy load

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

Решение: Избегайте перезапуска вибрирующего экрана при большой нагрузке.

2. Повреждение демпфирующей системы.

Если демпфирующая пружина выходит из строя или слишком много материала под экраном и т. Д., Система демпфирования выйдет из строя и вызовет повреждение вибровозбудителя.

Решение: регулярно проверяйте демпфирующую пружину и вовремя заменяйте пружины, которые выходят из строя и деформируются. При замене заменяйте все демпфирующие пружины одновременно, насколько это возможно, и убедитесь, что жесткость каждой группы пружин до и после замены одинакова.

Таким образом, существует две общие проблемы с вибровозбудителями и соответствующие решения. Возбудитель с вибрирующим грохотом должен строго следовать соответствующим инструкциям по эксплуатации во время установки и использования, чтобы обеспечить безопасную работу оборудования.