Vibrating screen is a very important material screening equipment in the mining industry.The material can be divided into multiple different levels through a single-layer or multi-layer screen with evenly distributed holes,so as to facilitate the use of subsequent processes.What are the components?The following vibrating screen manufacturer will give you a detailed answer.
The composition of the vibrating screen
There are generally two types of vibrators for single-shaft vibrating screens and dual-shaft vibrating screens according to the way of eccentric reconfiguration.The block eccentric type is better for the configuration of the eccentric weight.
The screen box is composed of a screen frame,a screen surface and a pressing device.The screen frame is composed of side plates and beams.The screen frame must be sufficiently rigid.
The supporting device of the vibrating screen has two types:hanging type and seat type.The seat type installation is relatively simple,and the installation height is low,generally should be preferred.The supporting device of the vibrating screen is mainly composed of elastic elements.Commonly used are coil springs,plate springs and rubber springs.
The vibrating screen usually adopts a V-belt transmission device.The structure of the vibrating screen is simple,and the number of revolutions of the vibrator can be selected arbitrarily,but the belt is easy to slip during operation,which may cause the screen hole to be blocked.Vibrating screens are also directly driven by couplings.The coupling can maintain a stable number of revolutions of the vibrator and has a long service life,but it is difficult to adjust the number of revolutions of the vibrator.
Screening process of vibrating screen
The actual screening process is:after a large number of broken materials with different particle sizes and mixed thicknesses enter the screen surface,only a part of the particles contact the screen surface.Due to the vibration of the screen box,the material layer on the screen is loosened,so that large particles exist.The gap is further enlarged,and small particles take the opportunity to pass through the gap and transfer to the lower layer or conveyor.Because the gap between small particles is small and large particles cannot pass through,the original disorderly arrangement of particle groups separates,that is,they are layered according to particle size,forming an arrangement rule with small particles on the bottom and coarse particles on the top.The fine particles that reach the sieve surface can pass through the sieve of those smaller than the sieve hole,and finally realize the separation of coarse and fine particles and complete the screening process.
However,there is no sufficient separation.During sieving,there is generally a part of the under-sieve remaining in the over-sieve.When fine particles are sieved through the sieve,although the particles are smaller than the sieve openings,they have different degrees of difficulty in passing through the sieve.It is more difficult for materials and particles with similar sieve openings to penetrate the sieve,and even more difficult to penetrate the gap between the particles in the lower layer of the screen.