There are many types of vibrating screens. According to the movement track of materials, they can be divided into circular vibrating screens and linear screens. These two types are common screening equipment used in daily production. Want to know how to choose, today we will compare and see the difference between the two.

Classification of vibrating screen

The material trajectory according to the vibrating screen can be divided into:

Fine screening machines are used less in the production of grinding, and we will not make too many comparisons here. There is no essential difference between the pattern and the structural composition of the circular vibrating screen and the linear vibrating screen. The materials are sieved by the vibration of the screen surface, but the difference of the vibration trajectory directly affects the purpose of the screening.

Working principle 1 circular vibrating screen

The motor is driven by a V-belt to produce a high-speed rotation of the exciter eccentric block, which generates a large centrifugal inertial force, which excites the screen box to generate a circular motion of a certain amplitude, and the material on the screen is subjected to the impulse transmitted by the screen box on the inclined screen surface. A continuous throwing motion is generated, and the particles smaller than the mesh holes are sieved during the encounter of the material and the sieve surface, thereby achieving classification.

2 linear vibrating screen

The vibrating motor is used as the vibration source to make the material be thrown up on the screen, and the linear motion is moved forward. The material enters the feeding port of the screening machine evenly from the feeder, and several kinds of sieves are produced through the multi-layer screen. The upper and lower objects are discharged from their respective outlets.

Difference contrast 1 motion track

The material on the circular vibrating screen is circularly moved, and the material on the linear sieve is linearly moved forward.

2 shaker

The circular vibrating screen is a single shaft and uses an inertial motor to work. Therefore, it is also called a single-axis vibrating screen. The linear vibrating screen exciter consists of two shafts and works on the principle of vibration motor excitation, so it is also called double. Shaft vibrating screen.

3 plugging phenomenon

The material of the circular vibrating screen moves in a parabolic circular path on the screen surface, so that the material is dispersed as much as possible to improve the material jumping force, and the material stuck in the sieve hole can also jump out, thereby reducing the hole blocking phenomenon.

4 installation layout

Due to the small inclination angle of the screen surface, the height of the sieve is reduced, which facilitates the process layout.

5 screen inclination

According to the particle size of the material, the circular vibrating screen can change the inclination angle of the screen surface, thereby changing the moving speed of the material along the screen surface and increasing the processing capacity of the screen machine. In general, linear vibrating screens have a smaller screen angle in production.

6 materials

In general, the thicker the sheet used for making a circular vibration sieve box with manganese steel production, in order to resist the impact of material during screening. The material used for the linear vibrating screen is mainly made of light or stainless steel.

7 applicable fields

Circular Vibrating Screen screening mainly heavy, large particles, high hardness of the material, in mining, coal, quarries and other mining industries wider use.

Linear screen mainly screens fine particles, light weight and low hardness materials. It is mainly dry powder, fine granule or micro powder. It is widely used in food, chemical, building materials and pharmaceutical industries.

8 processing capacity

For the circular vibrating screen, since the exciter is arranged above the center of gravity of the screen box, the elliptical long axis at both ends of the screen box is formed into a lower figure-shaped shape, and the upper end of the elliptical long axis of the feeding end faces the discharge direction, which is advantageous for the material to be quickly Dispersion, and the upper end of the elliptical long axis of the discharge end is opposite to the discharge direction, which reduces the moving speed of the material, is beneficial to the screening of the difficult-to-screen material, and the arc-shaped screen surface increases the effective area of ​​the sieve machine, thereby improving its Processing capacity.

In addition, for difficult-to-screen materials, the circular vibrating screen can make the main shaft reverse, so that the vibration direction is opposite to the moving direction of the material, and the moving speed of the material along the screen surface is reduced (in the case where the screen inclination angle is the same as the spindle rotation speed) to improve the screening. effectiveness.

9 environmental protection

The linear vibrating screen can adopt a fully enclosed structure without dust and dust, which is more conducive to environmental protection.

summary

In the field of mine crushing, circular vibrating screens are used more. In actual production, whether the circular vibrating screen or the linear vibrating screen is selected mainly depends on the type of material and the application field handled by the user. The purpose of the screening is different, and the selected equipment is also different.