Classification and working principle of vibrating screen

A vibrating screen is a mechanical equipment suitable for sieving particles, powders, and mucus. It is currently used in the food, medicine, chemical, and metallurgical industries. During the operation of the vibrating screen, the maximum screening force is always maintained. It has the characteristics of high screening efficiency, large processing capacity, and convenient screen replacement. This article introduces the classification and application principles of vibrating screens.

1. Classification of vibrating screen

Vibrating screening equipment can be divided into mining vibrating screens, fine screening vibrating screens, and laboratory special vibrating screens according to their weight.

1) Mining vibrating screen can be divided into

Eccentric circular vibrating screen, dewatering screen, probability screen, circular vibrating screen, drum screen, linear vibrating screen, etc.

2) fine screening vibrating screen can be divided into

Three-dimensional rotary vibrating screen, ultrasonic vibrating screen, swing screen, linear vibrating screen, straight row screen, high-frequency vibration
Please refer to the vibrating screen series for screens, horizontal airflow screens, inspection screens, etc.

2. The working principle of the vibrating screen

1) Three-dimensional rotary vibrating screen

It uses a vertical motor as the excitation source, and eccentric weights are installed at the upper and lower ends of the motor. Convert the rotating motion of the motor into a horizontal, vertical, and inclined three-dimensional motion, and then transfer this motion to the screen surface. Adjusting the phase angle of the upper and lower ends can change the movement trajectory of the material on the screen surface. Suitable for food, pharmaceutical, chemical, metallurgical and other industries.

2) Linear vibrating screen

The linear vibrating screen is driven by dual vibrating motors. When the two vibrating motors rotate synchronously and in opposite directions, the exciting forces generated by the eccentric masses cancel each other out in the direction parallel to the axis of the motor. Stacked in the direction perpendicular to the motor shaft is a resultant force, so the trajectory of the screen is a straight line. The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the material’s self-gravity, the materials are thrown up and jump forward on the screen surface for linear motion, to achieve the purpose of screening and grading the materials. It can be used to realize automated operations in the assembly line. It has the characteristics of low energy consumption, high efficiency, simple structure, easy maintenance, and a fully enclosed structure without dust spillage. The maximum sieving mesh is 400 meshes, which can screen out 7 kinds of materials with different particle sizes.

3) Swing screen

The rocking vibrating screen is a low-frequency rotary vibrating screen imitating artificial shaking. Its principle is that the instantaneous motion is a combination of a radial displacement and a circular motion with the displacement as an axis (spiral motion). The exciter that can adjust the eccentricity produces a nonlinear three-dimensional movement, and the material also produces the same movement similar to manual operation, to achieve the purpose of screening. Coupled with the screening accessories can get a more ideal screening effect. It is suitable for spherical, cylindrical, flake, or even irregularly shaped materials that are easy to block the net and require precise screening.

4) Vibrating screen for mine

The power device of this series of linear two forms: direct drive by vibrating motor and indirect drive by ordinary motor driven by the vibration exciter through the coupling, which can meet the needs of different environments. The screen surface has various forms such as metal woven mesh, rods, casting, welding, punching, etc. The screen surface has a single-layer structure or a multi-layer arrangement, which can meet the requirements of different screening operations. Used as a screening machine in metallurgy, mining, coal, building materials, electric power, chemical, and other industries.

Different vibrating screens have different characteristics and functions. After reading this article, if you have any other questions, you can contact us. We will give you a detailed answer for your reference.