Space transhipment unloading elephant trunk design method based on discrete element method

Abstract

The invention is suitable for the technical field of unloading elephant trunks, and provides a space transhipment unloading elephant trunk design method based on a discrete element method, wherein a space transhipment unloading elephant trunk is composed of discrete elements of each segment. The design method comprises the following steps of: building a three-dimensional model of the discrete element of each segment through a three-dimensional software, and importing the three-dimensional model in a discrete element model software EDEM; creating a particle model of the material to be conveyed by the unloading elephant trunk, and importing the particle model of the material in the EDEM; determining simulation parameters, wherein the simulation parameters include operating speed and particle conveying quantity of a superior unloading device and a lower receiving device, and also include own material attributes of the particle and the discrete element, and contact attribute between the two; finishing simulation, and outputting simulation result. According to the invention, the discrete element method is introduced in the design process of the space transhipment unloading elephant trunk, movement locus of material flow in the elephant trunk can be fitted accurately, and variation of stress on each part of the elephant trunk can be calculated.

Description

technical field [0001] The invention belongs to the technical field of unloading chute, and in particular relates to a design method for space reloading unloading chute based on discrete element method. Background technique [0002] In metallurgy, coal, building materials, mining, chemical and other industrial fields, bulk materials are transported and processed every year, and the reloading of materials is an indispensable link in the process of transportation. With the increase of material handling capacity year by year, the design problems of material reloading are becoming more and more prominent, and the research in this area has also received extensive attention. [0003] The reloading system is mainly composed of three parts: the upper unloading equipment, the chute and the lower receiving equipment. The main function of the reloading system is to unload the materials from the upper unloading equipment to the central part of the lower receiving equipment through the ...

AI Technical Summary

Problems solved by technology

The first method needs to build a solid model of corresponding proportions, and use similar materials for physical simulation. It is more intuitive to operate, but the process is cumbersome, expensive, and long-term, and cannot be used on a large scale.

The second method mainly relies on the experience accumulated by the designer in the past engineering practice, which requires the designer to have strong comprehensive quality and design experience, and has higher requirements for the designer. big difference

The above two methods can still cope with the design of the chute under general working conditions, but for large transport volume, high drop, complex material characteristics (such as high moisture content, high abrasiveness, high brittleness, easy to break, etc.), chute In complex working conditions where the pipe shape is a space-shaped structure, the above methods cannot meet the design requirements, and often cause material blockage, spillage of the chute, serious wear of the chute, high noise, large dust, high crushing rate, wear of the receiving conveyor belt, Severe damage to the idler roller and other faults

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