Design and Test of a Crawler-Type Tiger-Nut Combine Harvester

Zhe Qu, Minghui Han, Yanliu Lv, Zheng Zhou, Zhijun Lv, Wanzhang Wang and Xun He ()
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Zhe Qu: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Minghui Han: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Yanliu Lv: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Zheng Zhou: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Zhijun Lv: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Wanzhang Wang: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Xun He: College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China

Agriculture, 2023, vol. 13, issue 2, 1-20

Abstract: Traditional harvesters of tiger nuts ( Cyperus esculentus ) face problems including low harvesting efficiency, high loss rate, high impurity rate, and high labor intensity. To solve these problems and improve the harvesting efficiency and quality of tiger nuts, a crawler-type tiger-nut combine harvester that integrates digging, soil removal, picking, screening, and collection was designed. The machinery comprises crawler devices and working devices. The key devices were designed through theoretical analysis. Therein, the digging and hoisting devices consist of digger blades, combined soil-breaking blades, and vibrating hoisting chains. The tuber picking and screening device is composed of the tuber picking drum, double-deck heterodromous vibrating screens, impurity removal blowers, and soil-crushing guide rollers. The crawler devices include the track assemblies and the hydraulic driving systems. SolidWorks was used to establish the virtual prototype model. Combined with simulation using the discrete element software, the law of motion of tiger-nut tubers in the digging, elevation, and screening processes was studied, which verified the feasibility of the design. Finally, a prototype was manufactured and fabricated to conduct field harvesting tests on tiger nuts. Field test results indicate that the harvesting efficiency, harvest rate, and impurity rate of the tiger-nut harvester are separately 0.216 ha/h, 98.14%, and 3.24%, which meet the harvesting requirements for tiger-nut growers.

Keywords: tiger nut; combine harvester; efficient harvesting; mechanical design; field test (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: 2023
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