Variable ellipticorbit equal-thickness vibrating screen

Abstract

The invention relates to an variable ellipticorbit equal-thickness vibrating screen, which is suitable for size grading and drainage of raw coal, ores and other materials and comprises a screen box, an elastic support, a single shock excitation transmission shaft, two eccentric exciters, a motor, a motor base and a tyre type coupler, wherein the screen box is composed of a screen plate and a screen net; the elastic support supports the screen box and comprises a front support and a rear support; the single shock excitation transmission shaft is arranged on the screen box; the eccentric exciters are arranged at the two ends of the single excitation transmission shaft; and the single shock excitation transmission shaft is arranged to a position which deviates from a centroid of the screen box, is arranged diagonally above the whole centroid of the screen box and does not coincide with the whole centroid of the screen box. The ellipticorbit stroke generated at a screen surface charge-in end is larger, and the long shaft of an ellipse tapers from the inlet to the middle part of the screen body is decreasing, thus changing the characteristic of same movement mode of a traditionally translational ellipse and mode of the constant strength acted on the screen box. The vibrating screen has strong material delivery capability at the charge-in end so as to realize uniform and layering particle size distribution; and the vibrating screen has simple structure, high screen-penetrating rate and good use effect.

Description

technical field [0001] The invention relates to a vibrating screen, in particular to a constant-thickness vibrating screen with a variable ellipse trajectory suitable for particle size classification and deintermediation of materials in coal mines, metallurgy, chemical industry, environmental protection and other fields. Background technique [0002] The elliptical vibrating screens currently used at home and abroad are generally biaxial or triaxial, and are usually composed of a screen box, a base and a vibrator. The vibrator includes a motor and a vibrating shaft with an eccentric block. The motor drives the vibrating shaft. The rotation generates centrifugal inertial force (exciting force), which makes the vibrating screen move in translation. When the center of gravity of the centrifugal inertial force coincides with the center of mass of the vibrating screen box, the vibrating screen box will move in translation, and the trajectory of each point on the screen box is the...

AI Technical Summary

Problems solved by technology

That is, the movement trajectory, conveying speed and throwing index of each point of the screen box are the same, the movement trajectory of the screen surface is single, and the movement mode of the screen surface is not ideal, so the screening efficiency is not high; at the same time, the structure of the three-axis vibrating screen is complex and the installation accuracy is high. It is not conducive to the large-scale development of vi

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