Two-degree-of-freedom oscillating screen

Abstract

The invention discloses a two-degree-of-freedom swing screen, which comprises a base, a front support rod, a rear support rod, a swing drive device, a vertical vibration device, a screen frame and a screen cloth. The front and rear ends of the screen frame are connected with the base through the front support rod and the rear support rod. The present invention can generate vibrations with two degrees of freedom. The swing driving device located in the middle of the base provides power for the rotary swing of the screen frame, and the vertical vibration device installed at the bottom of the screen frame is the vertical reciprocating vibration of the screen frame and the screen mesh. With the power provided, the materials on the screen surface can move forward and backward, left and right and vertically and achieve through-screening. Without changing the occupied area and the structure of the sieve body, the present invention can greatly increase the processing capacity, greatly improve the production efficiency, and reduce the production cost. It also has the advantages of simple structure, high reliability of the whole machine, good comprehensive performance, stable movement and easy maintenance. Convenient and other advantages, it can be applied to wood processing and coal, metallurgy, chemical industry, food, environmental protection and other fields.

Description

technical field [0001] The invention belongs to the technical field of vibrating screening equipment, in particular to a two-degree-of-freedom oscillating screen. Background technique [0002] The traditional swing sieving machine (also known as swing screen) is installed with a swing sieve disc on a base through the main shaft, and a driving motor is installed on the main shaft in the base, and the upper and lower screens are moved between the sieve disc and the periphery of the base. At least four elastic rubber rods are installed vertically. It is precisely because elastic rubber rods are used to limit the swing range between the sieve plate and the base, the material of the rubber rods is easily fatigued and damaged, and the rubber rods are easily corroded and have a short service life. At the same time, there is still a common problem in the existing oscillating screens, because the screen frame and the screen mesh only rotate and swing around the vertical axis, so tha...

AI Technical Summary

Problems solved by technology

However, the adjustment of the eccentric block of the existing rectangular oscillating screen is inconvenient, and the adjustment range is limited, resulting in a small amplitude range of the oscillating screen; moreover, the positioning springs of the existing oscillating screen mostly use rubber springs, because the frequency and amplitude of the oscillating screen are large , causing the rubber parts to be easily fatigued, aged, and easily broken, thus greatly reducing the screening efficiency and service life of the vibrating screen

[0004] Many domestic inventors have made some explorations in the design and research of the oscillating screen. For example, the Chinese invention patent with the application number 201611234361.8 discloses a self-balancing single-sided vibrating screen with two-way vibration damping device for wet fine coal screening. Driven oscillating screen, through the crank linkage mechanism, the screen frame and the connected frame produce relative motion back and forth, and at the same time, the vertical component of centrifugal force generated by the rotation of the pulley with eccentric weight makes the screen frame swing, and the transmission system is complicated. , the efficiency is low and the screen frame cannot move in the left and right directions; the Chinese utility model patent with the application number 201620089541.0 discloses a double-layer sieve grid swing screen, which is installed on a swing frame with at least two layers of sieve grids. Compared with the prior art Only a layer of screen is added; the Chinese utility model patent with application number 201620018651.8 discloses a new type of large-capacity swinging screen. There are several layers of swinging screens inside the screen frame, and the bottom of the support base is equipped with a main shaft counterweight iron. , there is a driven shaft counterweight iron above the support plate, but the eccentric adjustment of this technical solution is inconvenient, and there is only one vibration degree of freedom; the Chinese utility model patent with application number 201220576041.1 discloses

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