9 differences between circular vibrating screen and linear vibrating screen
There is no essential difference in the style and structural composition of the circular vibrating screen and the linear vibrating screen. The materials are all screened by the screen surface vibration, but the difference of the vibration trajectory will directly affect the screen purpose.
➤ Round vibrating screen
The motor drives the eccentric block of the exciter to rotate at a high speed through the V-belt, generating a large centrifugal inertial force, exciting the screen box to produce a circular motion with 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 screen hole penetrate the screen when the material meets the screen surface to achieve classification.
➤ Linear vibrating screen
Using vibration motor excitation as the vibration source, the material is thrown up on the screen and moves forward linearly. The material enters the feed port of the screen evenly from the feeder, and several specifications of screens are generated through the multi-layer screen. The upper objects and the lower objects are discharged from their respective outlets.
➤ Motion track
The material on the circular vibrating screen moves circularly, and the material on the linear screen moves linearly forward.
The circular vibrating screen is also called a single-axis vibrating screen because the vibrator is a shaft and works with an inertial motor. The linear vibrating screen vibrator is composed of two shafts and works using the principle of vibration motor excitation, so it is also called double Shaft shaker.
➤ Hole blocking phenomenon
The material of the circular vibrating screen moves in a parabolic circular trajectory on the screen surface, so that the material is dispersed as much as possible to improve the springing force of the material, and the material stuck in the screen hole can also jump out, reducing the phenomenon of plugging.
➤ Installation arrangement
Due to the small inclination of the screen surface, the height of the screen is reduced for the linear vibrating screen, which is convenient for process layout.
➤ 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 movement speed of the material along the screen surface and increasing the processing capacity of the screen machine. Generally speaking, the inclination angle of the screen surface of the linear vibrating screen in production is small.
Under normal circumstances, the plate used in the production of the circular vibrating screen is thicker, and the box body is made of manganese steel, in order to resist the impact of the materials during the screening process. The materials used for making the linear vibrating screen are mainly light-weight plates or stainless steel plates.
➤ Fields of application
Circular vibrating screens are mainly used to screen materials with large specific gravity, large particles and high hardness, which are widely used in mining, coal, quarrying and other mining industries.
Linear sieves are mainly used to screen fine particles, materials with light specific gravity and low hardness. They are mainly dry powder, fine particles or fine powder materials. They are generally used in food, chemical, building materials and pharmaceutical industries.
➤ Processing capacity
For the circular vibrating screen, since the exciter is arranged above the center of gravity of the screen box, the elliptical long axes of the two ends of the screen box form a lower figure eight, and the upper end of the elliptical long axis of the feeding end faces the discharge direction, which is conducive to rapid material The upper end of the elliptical long axis of the discharge end is reversed to the discharge direction, which reduces the speed of material movement, which is conducive to the penetration of difficult-to-screen materials, and the arc-shaped screen surface increases the effective area of the screen machine, thereby increasing its Processing power.
In addition, for materials that are difficult to screen, the circular vibrating screen can reverse the main shaft, so that the direction of vibration is opposite to the direction of motion of the material, and the speed of movement of the material along the screen surface is reduced (if the inclination of the screen surface is the same as the speed of the main shaft) to improve screening effectiveness.
➤ Environmental protection
The linear vibrating screen can adopt a fully enclosed structure without dust spillage, which is more conducive to environmental protection.