What is the difference between a circular vibrating screen and a linear vibrating screen?

Whether it is a crusher production line or a sand making production line, basically vibrating screens are used. There are many types of vibrating screens, which can be divided into circular vibrating screens and linear vibrating screens according to the movement trajectory of the material. These two types of screening equipment are usually used in daily production. So, what is the difference between a circular vibrating screen and a linear vibrating screen? The following content teaches you to distinguish between circular vibrating screen and linear vibrating screen.

There is no essential difference in the style and structure of the circular vibrating screen and the linear vibrating screen. The material is vibrated and screened through the surface of the screen, but the difference of the vibration trajectory will directly affect the screening purpose.

Circular vibrating screen: The motor drives the eccentric mass of the exciter to rotate at a high speed through a triangular belt. The triangular belt generates a large centrifugal inertia force to stimulate the circular motion of the screen box with a certain amplitude. The material on the screen is transmitted through the screen frame on the inclined screen surface. A given pulse will produce a continuous throwing motion. When the material meets the surface of the sieve, particles smaller than the holes of the sieve can pass through the sieve to achieve classification.

Linear vibrating screen: The vibrating motor is used as the vibration source, so that the material is thrown on the screen and moves straight forward at the same time. The material enters the inlet of the screening machine evenly from the feeder and passes through the multi-layer screen to generate data. The above-mentioned sieve and under-sieve specifications are discharged from their respective outlets.

1. Material

Generally, the plates used to produce circular vibrating screens are thicker, and the boxes are made of manganese steel to resist the impact of materials during the screening process. The materials used to produce linear vibrating screens are mainly light plates or stainless steel plates.

2. Processing ability

For a 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 in the shape of a lower eight, and the upper end of the oblong is an ellipse. The axis of the feeding end faces the direction of discharging, which is conducive to the rapid flow of materials. Unfold, and the upper end of the elliptical long axis at the discharge end is opposite to the discharge direction, which will reduce the moving speed of the material, which is beneficial to the material that is difficult to screen, and the curved screen surface increases the effective screening machine area, thereby Increase its effective area. Processing power. In addition, for materials that are difficult to screen, the circular vibrating screen can reverse the main shaft to make the vibration direction opposite to the moving direction of the material, reduce the moving speed of the material along the screen surface, and improve the screening efficiency.

3. The hole is blocked

The material of the circular vibrating screen moves in a parabolic circular trajectory on the surface of the screen, so that the material is dispersed as much as possible to improve the bounce force of the material, and the material stuck in the screen hole will also jump to reduce the hole blockage phenomenon .

4. Screen angle

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 improving the productivity of the screen machine. Generally speaking, the linear vibrating screen has a smaller screen angle during the production process.

5. Installation layout

Due to the small inclination of the screen surface, the linear vibrating screen reduces the height of the screen and facilitates the process layout.

6. Movement trajectory

The material on the circular vibrating screen moves in a circular motion, while the material on the linear screen moves forward linearly.

7. Vibration exciter

The circular vibrating screen is also called a single-shaft vibrating screen, because the exciter is a shaft that works with an inertial motor. The linear vibrating screen vibrator consists of two shafts and works according to the principle of vibrating motor excitation, so it is also called a dual-axis vibrator.

8. Applicable fields

The circular vibrating screen mainly screens materials with high specific gravity, large particles and high hardness. It is widely used in mining industries such as mines, coal and quarries. Linear sieve mainly screens fine particles, light specific gravity and low hardness materials. It is mainly dry powder, fine particle or micro powder material. It is commonly used in the food, chemical, construction materials and pharmaceutical industries.

9. Environmental protection

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

The most widely used in the field of mining crushing is the circular vibrating screen. In actual production, the choice of circular vibrating screen or linear vibrating screen mainly depends on the type of material handled by the user and the field of application.