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A comparative study on design standards of screw conveyors in China,Germany,and the USA–Part II:Discrete element method

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Particuology 2024年第9期92卷 113-125页

作者： Yuan Tan Michael Rackl Weijie Yang johannes fottner Wenjun Meng Stephan Kessler Technical University of Munich Chair for Materials HandlingMaterial FlowLogisticsGarchingGermany Ibracon–Ingenieurbüro Dr.-Ing.Rackl ZornedingGermany School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuanChina

This part of the study aims to evaluate the advantages and disadvantages of technical standards of screw conveyors in China,Germany,and the USA for industrial *** source or determination method of empirical coefficients as well as the theoretical foundation of dimensioning-relevant diagrams in these standards is not explicitly documented in the ***,instead of less efficient on-site tests,the numerical simulation by discrete element method is *** on the geometrical and operational designs determined in three standards for horizontal,slightly inclined,and vertical conveyance of three representative bulk solids(barley,lignite,and sand),the potential influencing factors are *** constant particle and contact parameters,the potential deviations caused by particle models are ***,the accuracy of power consumption calculation of each standard and the divergence between accessible and required mass flows is comprehensively assessed based on the analysis of simulated *** main conclusions are drawn:(1)Particle fall back is barely considered by all three standards and leads to overestimated mass throughput;(2)The decrease in mass throughput caused by an increasing degree of filling can be compensated by slowing down the rotational speed.

关键词： Discrete element method Design standard Screw conveyor Screw auger Bulk solid

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A comparative study on design standards of screw conveyors in China,Germany and the USA-PartⅠ:Theoretical calculation and quantitative analysis

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Particuology 2022年第10期20卷 61-76页

作者： Yuan Tan Michael Rackl Weijie Yang johannes fottner Wenjun Meng Stephan Kessler Technical University of Munich Chair for Materials HandlingMaterial FlowLogisticsGarchingGermany Ibracon-Ingenieurbiiro Dr.-Ing.Rackl ZornedingGermany School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuanShanxiChina

Screw conveyors,widely used devices for transporting bulk materials,play an irreplaceable role in the modern industrial *** of their traditional advantages,designers of screw conveyors still heavily rely on their own country's experiments and standards,which are closely related to empirical ***,the same conveying task often results in different *** work aims to compare the design standards of screw conveyors in China,Germany and the *** on related standards acquired from renowned associations in the three countries,the similarities and particularities of these design guidances are *** preforming the geometrical and operational designs for horizon-tal,slightly inclined and vertical conveyance of three representative bulk solids(barley,lignite,sand),the advantages and disadvantages of these semi-empirical designs are comprehensively ***-thermore,the potential influence of empirical coefficients,which are not explicitly documented,are extensively *** analysing all outcomes,the compatibility and applicability of each standard are qualitatively assessed.

关键词： Design standard Screw conveyor Screw feeder Screw auger Bulk solids

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