Design and Experiment of Precision Seed Metering Device for Flow Adsorption of Quinoa Seeds

Wendong Zhong, Xuan Zhao, Fei Liu (), Hongbin Bai, Wenxue Dong, Hengtong Hu and Xiang Kong
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Wendong Zhong: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China
Xuan Zhao: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China
Fei Liu: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China
Hongbin Bai: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China
Wenxue Dong: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China
Hengtong Hu: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China
Xiang Kong: College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 01000, China

Agriculture, 2024, vol. 14, issue 3, 1-18

Abstract: This paper proposes a solution to the problem of tight population in the filling area of traditional air suction seed metering devices during quinoa sowing, which leads to inaccurate adsorption. The proposed method disperses the population into a stable seed flow and absorbs the seeds in a flow posture. The flow adsorption precision seed metering device is designed and improved, and the key structure parameters are optimized based on the shape and size parameters of quinoa seeds. A four-factor and three-level response surface orthogonal test is conducted using the Box–Behnken experimental design. The number of seeds, flow angle, negative pressure at the suction hole, and advancing speed are taken as experimental factors, and the qualified index of grain number per hole, qualified index of hole distance, and coefficient of variation of hole distance are used as evaluation indices. The results are optimized using extreme value theory, and it is found that when the seed amount is 5.82 mm, the flow angle is 31.08°, the negative pressure of the air chamber is 1.7 kPa, and the advancing speed is 3.82 km·h −1 , and the qualified index of hole number is 94.37%, the qualified index of hole distance is 95.39%, and the coefficient of variation of hole distance is 4.51%. The results are in general agreement with the prediction through the bench validation test, which meets the requirements of quinoa seed metering devices.

Keywords: quinoa; air suction seed-metering device; mechanical–pneumatic coupling; flowing adsorption; small particle size seed (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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