Design and experiment of air-suction roller corn precision dibbler based on DEM-CFD coupling

Authors

  • Yong Chen 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
  • Junwu He 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
  • Xing Yu 2. Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Zhengzhou 450003, China
  • Bin Hu 3. College of Mechanical and Electronic Engineering, Shihezi University, Shihezi 832000, China
  • Lianhao Li 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
  • Xiuli Zhang 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
  • Xiaochan Liu 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
  • Ruonan Mao 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China

DOI:

https://doi.org/10.25165/ijabe.v18i5.9326

Keywords:

corn, air-suction roller precision dibbler, sawtooth seed cleaning, DEM-CFD coupling, orthogonal test

Abstract

Addressing the issues of poor performance and low single-seed rate during seed filling and cleaning for corn, an air-suction roller precision dibbler was designed, and its main structure and working principle were elaborated. Based on the structure of the seed metering disk and the tri-axial dimensions of corn seeds, an auxiliary filling type hole boss was designed with a radius of 4 mm and a thickness of 1.5 mm. A sawtooth-type seed cleaning device was also designed, with an installation angle greater than 3° and a serrated chamfer less than 62.1°. By coupling the Discrete Element Method (EDEM) with Computational Fluid Dynamics (CFD), the flow field structure and seed metering performance were simulated and analyzed, examining the movement states of the seed population and individual seeds during the processes of filling, cleaning, carrying, and initial seed dropping. The variation patterns of the internal flow field pressure and fluid velocity of the seed metering device under different negative pressures and operating speeds were studied. Through the construction of a test bench and single-factor and three-factor orthogonal experiments, along with multi-objective optimization methods, the primary and secondary factors affecting the qualification index were determined. The optimization results showed that when the flow field negative pressure was 3.52 kPa, the operating speed was 5.81 km/h, and the suction hole diameter was 4.15 mm, the qualification index of the seed metering device was 93.2%, the missed seeding index was 3.3%, and the multiple seeding index was 3.5%. An adaptability test was conducted to verify these results, revealing that the qualification index for all three varieties of corn seeds exceeded 92.4%, the missed seeding index was less than 3.7%, and the multiple seeding index was less than 3.9%, satisfying the precision seeding requirements for corn seeds. Keywords: corn, air-suction roller precision dibbler, sawtooth seed cleaning, DEM-CFD coupling, orthogonal test DOI: 10.25165/j.ijabe.20251805.9326 Citation: Chen Y, He J W, Yu X, Hu B, Li L H, Zhang X L, et al. Design and experiment of air-suction roller corn precision dibbler based on DEM-CFD coupling. Int J Agric & Biol Eng, 2025; 18(5): 142–153.

Author Biography

Yong Chen, 1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China

Yong Chen, PhD, Associate Professor, research interest: design and performance test of agricultural machinery. College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China. Tel: +86-15699338891, Email: chenyong@henau.edu.cn

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Published

2025-10-27

How to Cite

Chen, Y., He, J., Yu, X., Hu, B., Li, L., Zhang, X., … Mao, R. (2025). Design and experiment of air-suction roller corn precision dibbler based on DEM-CFD coupling. International Journal of Agricultural and Biological Engineering, 18(5), 142–153. https://doi.org/10.25165/ijabe.v18i5.9326

Issue

Vol. 18 No. 5 (2025): IJABE

Section

Power and Machinery Systems

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