Design and Experimentation on a Pneumatic Corn Seed Metering Device with Assisted Seed-Filling and Airflow-Guided Seed Release

Jiahua Yan, Guangwei Wu (), Rui Liu, Liwei Li, Yuejin Xiao, Junxian Guo and Bingxin Yan ()
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Jiahua Yan: College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China
Guangwei Wu: College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China
Rui Liu: Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Liwei Li: Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Yuejin Xiao: Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Junxian Guo: College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China
Bingxin Yan: Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China

Agriculture, 2025, vol. 15, issue 7, 1-20

Abstract: In view of the problem that the qualified index of grain spacing deteriorates during high-speed operation of the pneumatic corn seed dispenser, a new method of homologous dual-action positive-pressure-assisted seed filling and seed release is proposed, and a pneumatic corn seed dispenser with assisted inflow filling is designed. The structure and working principle of the seed dispenser are explained, and a theoretical analysis is carried out on the seed filling and seed release process in the seed guide tube. The key structural parameters of the conical deflector-groove seed metering disc and the homologous airflow-assisted seed release mechanism are determined. The test factors were working pressure and operating speed, and the evaluation indicators were the qualified particle spacing index, missed sowing index, resowing index, and qualified particle spacing variation coefficient. A full-factor bench test was carried out, and the test results showed that when the sowing speed was 6 km/h and the working pressure was 5 kPa, the qualified particle spacing index was 96.37%, the missed sowing index was 0.30%, the resowing index was 3.33%, and the coefficient of variation in the qualified particle spacing was 17.37%. The results of the field test showed that when the operating speed was 6 km/h and the working pressure was 5 kPa, the qualified particle spacing index was 95.30%, the missed sowing index was 2.33%, and the resowing index was 2.37%. All indicators met the technical requirements for precision single-seed maize sowing.

Keywords: corn; pneumatic-assisted seed metering device; pneumatic-assisted guided seed-filling; same-source airflow-assisted seed release; precision sowing (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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