In the field of mining crushing,vibrating screens are widely used.Common types include linear vibrating screens and circular vibrating screens.There is no essential difference in the style and structure of the two.The materials are screened through the vibration of the screen surface.,What are the differences between the linear vibrating screen and the circular vibrating screen?
The working principle of vibrating screen
1.Linear vibrating screen
Vibration motor is used as the source of vibration,so that the material is thrown up on the screen while moving forward in a straight line.The material enters the inlet of the screening machine evenly from the feeder,and produces several kinds of screens through the multi-layer screen.The upper material and the lower material are discharged from their respective outlets.
2.Circular vibrating screen
The motor drives the eccentric block of the vibration exciter through the V-belt to rotate at a high speed,which produces a large centrifugal inertial force,which stimulates the screen box to produce a circular motion with a certain amplitude.The material on the screen is affected by the impulse transmitted by the screen box on the inclined screen surface.A continuous throwing motion is produced,and the particles smaller than the sieve hole are passed through the sieve when the material meets the screen surface,thereby achieving classification.
The differences between linear vibrating screen and circular vibrating screen
1.Movement track:the material on the linear vibrating screen moves forward in a straight line;the material on the circular vibrating screen moves in a circular motion.
2.Vibration exciter:The exciter of the linear vibrating screen is composed of two shafts,and it works by the principle of vibration motor excitation,so it is also called a double-shaft vibrating screen;because the exciter is a shaft,the circular vibrating screen uses The inertial motor works,so it is also called a single-axis vibrating screen.
3.Hole blocking: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,thereby improving the material’s bounce force,and the material stuck in the screen hole can also jump out,more than a straight line.The probability of the vibrating screen being blocked is small.
4.Installation arrangement:Due to the small inclination of the screen surface of the linear vibrating screen,the height of the screen is reduced,which is convenient for process layout.
5.Screen surface inclination:Generally speaking,the inclination angle of the screen surface of the linear vibrating screen in production is small;but 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.Improve the processing capacity of the sieve machine.
6.Material:Under normal circumstances,the materials used in the production of linear vibrating screens are mainly light plates or stainless steel plates;while the circular vibrating screens are made of thicker plates,and the box body is made of manganese steel to resist the screening process.The impact of the material.
7.Applicable fields:Linear vibrating screen mainly screens fine particles,light specific gravity,and low hardness materials,mainly dry powder,fine granular or micro powder materials,usually in the food,chemical,building materials,and pharmaceutical industries.Wide;the circular vibrating screen mainly screens materials with high specific gravity,large particles and high hardness.It is widely used in mines,coal,quarries and other mining 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 in a lower eight shape,and the upper end of the elliptical long axis at the feeding end faces the discharge The direction is conducive to the rapid spread of the material,and the upper end of the elliptical long axis of the discharge end is opposite to the discharge direction,which reduces the movement speed of the material,which is conducive to the penetration of the difficult-to-screen material,and the arc-shaped screen surface increases the screen size.Effective area,so the processing capacity is stronger than linear vibrating screen.In addition,for materials that are difficult to screen,the circular vibrating screen can turn the main shaft,so that the direction of vibration is opposite to the direction of material movement,and the speed of the material moving along the screen surface is reduced(when the inclination angle of the screen surface is the same as the rotation speed of the main shaft)to increase the screen.Sub-efficiency.
9.Environmental protection:The linear vibrating screen can adopt a fully enclosed structure without dust spillage,which is more conducive to environmental protection.
In the field of mining crushing,circular vibrating screens are widely used,but 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 application field.The purpose of screening is different,and the equipment selected is also Will be different.