Variable-amplitude constant-thickness sieve

Abstract

The invention discloses a variable-amplitude constant-thickness sieve. The variable-amplitude constant-thickness sieve comprises a sieve box body, vibration exciters, a sieving surface, damper springs and a bottom support, wherein bearing beams, vibration exciting beams and a strengthening beam are installed at the bottom, the middle and the top between two sieve box side plates separately, the sieving surface is installed on the bearing beams, and the vibration exciters comprises a feeding end vibration exciter which is installed on a feeding end vibration exciting beam and a discharging end vibration exciter which is installed on a discharging end vibration exciting beam; the sieve box body is installed on the bottom support through the damping springs which are symmetrically arranged on the outer sides of the two sieve box side plates; and each vibration exciting beam can rotate by any angle along the center line of the vibration exciting beam, so that adjustment of the vibration exciting direction of the vibration exciters on the vibration exciting beams is achieved, the amplitude and movement locus of the sieving surface from the feeding end to the discharging end are changed, and constant-thickness sieving of materials is achieved. The variable-amplitude constant-thickness sieve is simple in structure, convenient to use, stable and efficient, variable-amplitude sieving from the feeding end to the discharging end is achieved by means of the vibration exciters arranged at the feeding end and the discharging end, the utilization rate of the sieving surface is high, the unit-area treatment capacity is large, and the working condition adaptability is high.

Description

technical field [0001] The invention relates to a variable-amplitude equal-thickness screen, which belongs to the technical field of screening machinery and is suitable for efficient equal-thickness screening of materials. Background technique [0002] Sieving is a grading process in which loose mixed materials pass through the sieve holes of a single-layer or multi-layer sieve surface, and are divided into several different particle sizes according to the particle size. It can be divided into wet and dry sieving. There are many types of screening machinery, among which vibrating screens have become the main screening equipment due to their simple structure, high screening efficiency, small footprint, large processing capacity, easy disassembly and maintenance, and strong adaptability to working conditions. Applied in coal, metallurgy, petroleum, chemical industry, building materials, food, environmental protection and other fields, it is an important link in the production ...

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Problems solved by technology

[0003] At present, the equal-amplitude vibrating screen is widely used. Since the amplitude and vibration intensity from the feeding end to the discharging end are the same, the materials at the feeding end are prone to pile up, the thickness of the material layer is large, the layering is slow, and the efficiency of the screen is low. The layer of material on the sieve at the discharge end becomes thinner rapidly, the residence time of the material at the discharge end is short, the amount of sieve through the screen is small, the utilization rate of the screen surface is low, and the processing capacity per unit area is small, which restricts the large-scale and efficient processing of coal in my country

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