Design of the Vibrating Sieving Mechanism for a Quinoa Combine Harvester and Coupled Analysis of DEM-MBD

Ruijie Shi, Xiaojing Ren, Fei Dai, Wuyun Zhao () and Tianfu Wang
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Ruijie Shi: College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China
Xiaojing Ren: College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China
Fei Dai: College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China
Wuyun Zhao: College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China
Tianfu Wang: Lanzhou Vacuum Equipment Co., Ltd., Huayu Branch, Lanzhou 730030, China

Agriculture, 2025, vol. 15, issue 12, 1-23

Abstract: Quinoa is renowned for its high nutritional value, which not only meets the nutritional needs of the human body but also makes it a suitable option for individuals with diabetes and celiac disease due to its low sugar and gluten-free characteristics. In China, the primary cultivation regions of quinoa are the Tibetan Plateau, the Yunnan–Guizhou Plateau, and Northwest China, which are predominantly characterized by hilly and mountainous terrain, resulting in the gradual development of mechanized harvesting processes. The efficacy of the mechanized harvesting process in these regions is suboptimal, exhibiting poor clearance and efficiency. In this paper, the design and MBD-EDEM coupling analysis of the quinoa combine harvester’s cleaning and screening mechanism is carried out to simulate the cleaning process of quinoa threshing materials. The results show that the vibrating screen can complete the forward sliding and dispersed throwing up of the materials and effectively avoid the accumulation of the threshing materials. The coupling results of the permeability of each material in the cleaning and screening mechanism, as well as the vibrating screen movement condition, indicate that when the herringbone screen opening degree is set in the range of 15° to 30°, the cleaning and screening device can achieve a high cleaning efficiency while maintaining a low impurity rate. Field trial data further confirm that within this opening range, the cleaning effect and efficiency both exhibit significant advantages.

Keywords: coupled simulation; cleaning; harvesting; quinoa; agricultural machinery (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: 2025
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