Large linear vibrating screen with inclined screen surface employing four-axis vertical force screening

Abstract

The invention discloses a large linear vibrating screen with an inclined screen surface employing four-axis vertical force screening, belongs to the field of vibrating screening machinery, and solves the problem of large-scale development of linear vibrating screens. A vibration excitation source of a screening machine is four shaft-type vibration exciters or block-type eccentric vibration exciters, wherein the four shaft-type vibration exciters are divided into two groups, each group of shaft-type vibration exciters are connected through a synchronous toothed belt pulley and a synchronous toothed belt located at the shaft end, the two groups of shaft-type vibration exciters are symmetrically arranged at two sides of a gravity center G of a screen frame separately, the two groups of shaft-type vibration exciters rotate oppositely in the working process and operate synchronously to generate a linear motion trail, and the resultant force line L of the linear motion trail is perpendicular to the screen surface; the screen surface is composed of 2-4 layers, and the dip angle alpha of the screen surface is 20-30 degrees; and one end or two ends of each shaft-type vibration exciter are connected with a motor transmission device. The screening machine has the characteristics of good performance, high processing capacity, high screening efficiency, long service life and the like. The vibrating screen can be suitable for screening various materials in the fields of mines, coal mines, road building and life.

Description

technical field [0001] The invention belongs to the field of vibrating screening machinery, and mainly relates to a large-scale linear vibrating screen with a four-axis vertical force screening inclined screen surface, which is large in excitation force, strong in bearing capacity, convenient for the development of large-scale screening area and high in screening rate. Background technique [0002] Most of the existing grading screens with inclined screen surfaces have single-axis or double-axis structures, and the motion track of the screen surface is circular. The sieving area and vibration parameters of the sieving screen with such a structure The weight is limited by the service life of the vibrator bearing, which hinders the large-scale development of the grading screen and affects the improvement of its processing capacity. For the screening of fine particle materials, the projectile force obtained by the circular motion track material particles is small and the penetr...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing grading screens with inclined screen surfaces have single-axis or double-axis structures, and the motion track of the screen surface is circular. The sieving area and vibration parameters of the sieving screen with such a structure The weight is limited by the service life of the vibrator bearing, which hinders the large-scale development of the grading screen and affects the improvement of its processing capacity

For the screening of fine particle materials, the projectile force obtained by the circular motion trajectory material particles is small and the penetration force is weak, which makes the material stuck in the hole and the screening efficiency is low.

In addition, the distance between the upper and lower screen surfaces of the grading screen with the existing inclined screen surface is too small, and it is inconvenient to maintain and replace the vibrator and the screen mesh.

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