Mechanism Analysis and Experimental Verification of Side-Filled Rice Precision Hole Direct Seed-Metering Device Based on MBD-DEM Simulations

Jinwu Wang, Zhigang Yao, Yanan Xu, Fangyu Guo, Rui Guan, Heng Li, Han Tang () and Qi Wang
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Jinwu Wang: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Zhigang Yao: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Yanan Xu: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Fangyu Guo: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Rui Guan: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Heng Li: College of Electrical and Information, Northeast Agricultural University, Harbin 150030, China
Han Tang: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Qi Wang: College of Engineering, Northeast Agricultural University, Harbin 150030, China

Agriculture, 2024, vol. 14, issue 2, 1-23

Abstract: In order to solve the problems of poor hole-filling performance and the high seed-breakage rate of conventional rice bud seed precision hole direct seed-metering devices, a side-filled rice precision hole direct seed-metering device was developed, and the mechanism and force analyses for seeding operations were carried out. The key factors affecting seeding quality were determined: rotation speed, seeding angle and seeding height. By coupling the discrete element method (DEM) and multi-rigid body dynamics (MBD), the seed breakage rate and seeding performance at different rotation speeds were analyzed. Single-factor bench testing was used to analyze the effect of a duckbill unit on seeding performance under different factor levels. The three-factor and five-level quadratic regression orthogonal rotation center combination test methods were used to obtain the optimal working parameter combination. The test results showed that when the rotation speed was 47 r/min, the seeding angle was 19°, and the seeding height was 180 mm, the qualified index of seeding was 92.03%, the hole diameter qualified index was 91.62%, and the hole distance variation index was 7.17%. This study provides a reference for the research of mechanical rice sprouting seed-metering devices.

Keywords: mechanism analysis; high-speed camera; seeding track; seed breakage rate; hole direct seeding (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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