Two-degree-of-freedom oscillating screen

Abstract

The invention discloses a two-degree-of-freedom oscillating screen. The two-degree-of-freedom oscillating screen comprises a base, front supporting rods, rear supporting rods, an oscillating driving device, a vertical shock excitation device, a screen frame and a screen mesh. The front end and the rear end of the screen frame are connected with the base through the front supporting rods and the rear supporting rods. The two-degree-of-freedom oscillating screen can generate shock excitation of two degrees of freedom. The oscillating driving device located in the middle portion of the base provides power for rotating and oscillating of the screen frame. The vertical shock excitation device mounted at the bottom of the screen frame provides power for vertical reciprocating vibration of the screen frame and the screen mesh. Materials on the screen surface can do front-back, left-right and vertical motion to realize screen passing. Under the condition of not changing the occupied area and the screen body structure, the processing capacity can be substantially increased, the production efficiency can be greatly improved, and the production cost can be reduced. The two-degree-of-freedom oscillating screen has the advantages of being simple in structure, high in overall machine reliability, good in comprehensive performance, stable in motion, convenient to maintain and the like and isapplicable to the fields of wood processing, coal, metallurgy, chemical engineering, food and environmental protection.

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 a dual-axis swinging screen, the dual-axis Shaft swinging screen includes multiple layers of parallel sieve plates, and a rotating shaft passing through each sieve plate is installed on both sides of the sieve plate, and eccentric weights are installed on the rotating shaft, but the eccentric adjustment device of this technical solution is inconvenient to adjust and free to vibrate. The Chinese utility model patent with the application number of 200620126137.2 discloses a three-layer swing screen. The screen frame assembly is separated by the upper screen and the middle screen to form a three-layer space. The lower part of the screen frame assembly and the eccentric shaft assembly connected, the eccentric shaft assembly includes counterweights, eccentric shafts, etc., but the eccentric adjustment device of this technical solution is inconvenient to adjust and operate, and the structure is unstable; the Chinese utility model patent with application number 201020501536.9 discloses a swing screening machine, At least four rigid telescopic limit sleeve rods are installed on the outer circle between the base of the swing screening machine and the sieve tray. Although the limit performance is good, the spring cannot swing left and right, and the freedom of movement of the screen frame is less, reducing the The flexibility of the swing screen; the Chinese invention patent with application number 201710319144.7 discloses a swing screen, which uses a metal spring to replace the original rubber spring of the swing screen, but the support part has less freedom and cannot meet the actual working needs of the swing screen

[0005] With the integration of vibrating screening equipment into the automatic production line and the improvement of the requirements for indicators such as processing capacity, screening efficiency and floor space, the existing single-degree-of-freedom oscillating screen can no longer meet the actual needs of production, and it is urgent to develop a small footprint. , a new type of oscillating screen with large processing capacity, high screening efficiency and strong adaptability

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