Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Lin Niu, Zehao Zha, Haoran Yang, Jie Ma, Qinghao He, Yanan Wang, Yipeng Cui, Xiang Li and Duanyang Geng ()
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Lin Niu: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Zehao Zha: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Haoran Yang: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Jie Ma: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Qinghao He: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Yanan Wang: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Yipeng Cui: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Xiang Li: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China
Duanyang Geng: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255200, China

Agriculture, 2024, vol. 14, issue 6, 1-17

Abstract: In order to solve the problem of the high damage rate of corn with a high moisture content in the Huanghuaihai region, according to the mechanical characteristics of corn in the Huanghuaihai region, we designed a flexible threshing device with a threshing rasp bar and variable stiffness spring as the buffer carrier, and the elements of the device were nail teeth and a flexible threshing rasp bar, which could be replaced freely. The experiment was based on the threshing rotor speed, threshing gap, and spring stiffness as the influencing factors, with the grain breakage rate and the unthreshed rate as an indicator of three-factor three-level experiments, and in October in Zibo through bench experiments, to determine the best parameter combinations. When the spring compression stiffness was 20.83 N/mm, the rotor speed was 375 r/min, and the gap of the concave plate was 45 mm, the grain breakage rate of the corn ear was 4.7%, and the unthreshed rate was 0.48%, which is in line with the relevant national standards.

Keywords: low loss; conical spring; high moisture content (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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