Abstract
An incorrect formula of the average axial speed can lead to the incorrect derivation of the conveying volume formula, which in turn can produce an incorrect design of the vertical screw conveyor. In this study, the conveying model of the vertical screw conveyor and the raw coal particle model are established. Using the discrete element method, the influence of various parameters, such as the spiral speed, filling rate, pipe diameter, and pitch, on the axial velocity of the raw coal particles is calculated, simulated, and analyzed. Corresponding to the average axial velocity distribution histogram and the derivation of the particle average axial velocity formula, a theoretical basis for the optimization design of the vertical screw conveyor is provided.
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The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by National Natural Science Foundation of China under Grant No. 52075356, Shanxi Province Applied Basic Research Project under Grant No. 201801D221219, and Taiyuan University of Science and Technology Research Startup Fund Project.
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Sun Xiaoxia received her Ph.D. degree from the Department of Mechanical Engineering, Taiyuan University of Science and Technology. She is now a Professor at the Department of Mechanical Engineering, Taiyuan University of Science and Technology. Her research interests include continuous transport machinery, intelligent logistics equipment and gas-solid-liquid multiphase flow.
Zhao Yang is a graduate student at Taiyuan University of Science and Technology. His research interests include continuous conveying machinery and spiral ship unloading machinery.
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Yang, Z., Xiaoxia, S. & Wenjun, M. Research on the axial velocity of the raw coal particles in vertical screw conveyor by using the discrete element method. J Mech Sci Technol 35, 2551–2560 (2021). https://doi.org/10.1007/s12206-021-0526-z
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DOI: https://doi.org/10.1007/s12206-021-0526-z