В концентраторе вибрационный грохот является одним из наиболее часто используемых сортировочного оборудования. Эффект экранирования вибрирующего экрана имеет большое значение для последующей операции. Следовательно, как улучшить экранирующий эффект вибрирующего экрана — это проблема, которую необходимо рассмотреть. Проанализируйте, какие факторы влияют на эффект экранирования и как улучшить экранирующий эффект вибрирующего экрана, изменив эти факторы.

There are many factors that affect the screening effect of the vibrating screen for mines. Three of the more important factors are the characteristics of the material entering the screen, the parameters of the screen surface of the vibrating screen, and the movement parameters of the vibrating screen. We will analyze these three factors one by one and explore how to improve the effect of mine vibrating screen by changing these factors.

1. The characteristics of the material being screened

Different materials have different characteristics of their own, with differences in density, hardness, and water content. Generally speaking, the screening effect of materials with higher hardness and better brittleness is better than materials with lower hardness and poor brittleness. For the materials that enter the screen, there are two aspects that can directly affect the screening effect: the particle size of the material and the water content of the material.

When the particle size of the material is close to the mesh size, the screening efficiency will be significantly reduced. These particles may block the mesh and reduce the screening area. This is a common phenomenon in the closed-circuit crushing process. This situation can be improved by increasing the vibrating screen. The amplitude can be improved. The increase of the amplitude can promote the fine-grained material to pass through the screen surface and reduce the occurrence of clogging. In addition, it can increase the pass rate of the middle part of the screen to improve the screening effect. It can also be improved by changing the feeding method The utilization rate of the screen surface of the vibrating screen can be multi-channel feeding, which reduces the time and distance of the material on the screen moving on the screen surface and improves the screening effect.

When the material has a large water content, the material is prone to adhesion, which reduces the screening efficiency. Generally speaking, the wet material with a large water content can be improved by increasing the screen hole. However, if the material contains mud ,when the amount is greater than 8%, wet screening or pre-washing methods should be used for treatment.

2. Vibrating screen surface parameters

The screen surface parameters of the vibrating screen include the shape of the vibrating screen mesh, the opening rate of the vibrating screen surface, the material of the screen surface and so on. Generally speaking, a long screen surface has a long material residence time, more chances to penetrate the screen, and high efficiency, while a wide screen surface has better processing capacity. Practice has proved that the appropriate ratio of screen surface aspect ratio is 2:1~3:1.

The opening rate of the screen surface of the vibrating screen here refers to the screening area of ​​the vibrating screen, which is the ratio of the screen area to the total area of ​​the screen surface. The larger the screen area, the higher the productivity per screen surface and the higher the screening efficiency. As for the shape of the sieve holes, the choice is made according to the particle shape of the material. Generally, it is better to use square sieve holes for sieving round particles.

In terms of materials, different screen surface materials will also have an impact on the screening effect, which can directly affect the adhesion coefficient of minerals and screens. For viscous minerals, rubber and polyurethane should be used for screen materials with greater elasticity. Ensure that the material on the screen is loose. However, this type of material usually has the disadvantage of a small open porosity.

After combining the above aspects, we can know that when selecting the vibrating screen surface, different materials and opening rates should be considered comprehensively.

3. Motion parameters of vibrating screen

The motion parameters of the vibrating screen include two factors: the vibration frequency of the vibrating screen and the direction angle of the vibrating screen. Vibration enables the material on the screen surface to be thrown away from the screen surface, so that the coarse material reaches the upper layer of the material layer, and the fine material reaches the lower layer of the material layer, close to the screen surface, the screen layer is evenly distributed, and the passing rate of fine materials increases accordingly. For materials with large particle size, generally the higher the frequency, the higher the number of bounces on the screen surface, the increased chance of contact between the material and the screen surface, and the reduction of the occurrence of clogging of the screen holes. Therefore, an appropriate increase in the vibration frequency can effectively improve the screening effect.

The vibration direction angle is the angle between the vibration direction line and the screen surface. The larger the value of this angle, the smaller the horizontal movement distance of the material during the screening process, and the lower the movement speed on the screen. It is obtained through practice. For materials that are easy to screen, the direction angle should be small, and for materials that are difficult to screen, the direction angle should be large. In general, the direction angle of the linear vibrating screen is between 30 degrees and 60 degrees, and the direction angle of the circular vibrating screen is 90 degrees.

После проведенного выше анализа мы понимаем некоторые факторы, которые влияют на экранирующий эффект вибрационного грохота шахты, и понимаем, как повысить эффективность вибросита. Короче говоря, мы должны выбрать вибрационный грохот в соответствии с реальными потребностями и выбрать подходящий материал поверхности экрана, насколько это возможно, чтобы улучшить возбуждение регулировки двигателя. Сила вибрации, и постарайтесь обеспечить более низкое содержание воды в материале и улучшить эффект просеивания под предпосылкой обеспечения производительности обработки.

В вибрационном грохочущем оборудовании в качестве источника возбуждения обычно используется вибрационный двигатель, чтобы грохот мог достигать эффективной мощности. Различные формы установки и комбинации вибродвигателя на вибрирующем теле могут создавать различные траектории спортивной одежды для материала с помощью вибрационного грохота, тем самым достигая эффективности. Целью сортировки и сортировки является выполнение собственных операций. Траекторию вибросита условно можно разделить на следующие типы:

1. Линейная вибрация

Linear vibration: the projection of the vibration trajectory of the vibrating body (vibrating box and material) on the horizontal and vertical planes is linear, and its vibration form is called linear vibration. This type of vibrating screen is called linear vibrating screen or linear screen. Install two vibration motors of the same model on the body of the vibration equipment so that the shafts of the two vibration motors are parallel to each other. When the two vibration motors rotate in opposite directions, the two vibration motors must run synchronously, and the body produces linear vibration. .

2. Rotational vibration

Rotary vibration is also called three-dimensional vibration: the projection of the vibration track of the vibrating body on the horizontal plane is a circle or ellipse, and its vibration form is called rotational vibration. This type of vibrating screen is called rotary vibrating screen. Rotary vibration can be divided into three forms: flat-rotation type vibration, vortex type vibration and double-rotation type vibration. When the projection of the vibration trajectory of the vibrating body on the vertical plane is a horizontal straight line, the vibration form is called pan-rotation vibration; when the projection of the trajectory of the vibrating body on the vertical plane is a diagonal line, the vibration form is called Vortex type vibration; when the vibration track of the vibrating body is projected as a circle or ellipse on the vertical plane, its vibration form is called compound-rotation type vibration. Rotary vibration is usually generated by the vibration equipment excited by the vertical vibration motor, and the vibration form depends on the angle between the vibration blocks at both ends of the vertical vibration motor. It is also possible to install two foot-mounted vibration motors on both sides of the vibration device, so that the rotating shaft is at a set angle, and the vibration device will also produce rotational vibration.

3. Compound vibration

The vibration of the vibrating body is produced by two sets of excitation systems, and its vibration form is called compound vibration. There are generally two types of dual-frequency compound type and double-amplitude compound type. Some special performance vibrating screening equipment uses two vibration motors of different models and different speeds, which are installed at the receiving end and the discharge end of the screening equipment, so that the receiving end exhibits large amplitude and low frequency vibration, and the output The material end presents a small amplitude and high frequency vibration, and the middle of the screening equipment overlaps two kinds of vibrations, so that the screening equipment plays a more effective screening role.

4. Circular or elliptical vibration

Проекция траектории колебаний вибрирующего тела на горизонтальную плоскость представляет собой прямую линию, а проекция на вертикальную плоскость — круг или эллипс, а его форма колебаний называется колебанием круга или эллипса. Этот вид вибрационного грохота называется круглым вибрационным грохотом или круглым вибрационным грохотом. Обычно на корпусе вибрационной машины устанавливается вибродвигатель для создания такого движения. Круговая или эллиптическая вибрация возникает в плоскости, перпендикулярной оси вращения вибродвигателя, и ее форма зависит от относительного положения вибромотора и центра тяжести всей машины.

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.