Seed movement characteristics and filling performance of seed metering device for baby bok choybased on CFD-DEM approach Seed movement characteristics and filling performance of seed metering device for baby bok choy based on CFD-DEM approach*

doi:10.12398/j.issn.2096-7217.2020.01.005

Journal of Intelligent Agricultural Mechanization (in Chinese and English) ›› 2020, Vol. 1 ›› Issue (1): 32-43.DOI: 10.12398/j.issn.2096-7217.2020.01.005

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Seed movement characteristics and filling performance of seed metering device for baby bok choybased on CFD-DEM approach Seed movement characteristics and filling performance of seed metering device for baby bok choy based on CFD-DEM approach^*

Tong Hu^1,2, Xindan Qi², Hua Li ^1,3, Song Yang^1,3, Yongjian Wang^1,3, Suyang Xu^1,2, Mingchao Bai^1,2

1. Key Laboratory of Intelligent Agricultural Equipment in Jiangsu Province/Nanjing Agricultural University, Nanjing, 210031, China;
2. Nanjing Tech University, Nanjing, 211816, China;
3. College of Engineering, Nanjing Agricultural University, Nanjing, 210031, China

Received:2019-12-26 Online:2020-08-15 Published:2021-11-30
Corresponding author: Hua Li, Doctor, research direction: precision agriculture and harvesting techniques and equipment. E-mail: lihua@njau.edu.cn.
About author:Tong Hu, postgroduate, research direction: intelligent agricultural equipment. E-mail: hutong_93@163.cm.
Supported by:
National Key R&D Program of China “Vegetable Intelligent Fine Production Technology and Equipment R&D” (Grant No. 2017YFD0701300)

Abstract

Abstract: To investigate the movement characteristics and filling performance of seeds in the working process of seed metering device, the movement characteristics of seed A which successfully completed the seeding process and seed B that dropped in advance during the working process were studied based on computational fluid dynamics and discrete element method (CFD-DEM) coupling approach. The analysis of seed velocity, compressive force and position were found that the movement characteristics of the two types of seeds in the process of moving to the leftmost side of the seed plate were basically the same. During the movement from the leftmost side of the seed plate to the positive pressure zone, the velocity and compressive force of the seed change greatly. The process was relatively unstable, and seeds were prone to fall early. The effects of seed agitator's rotational speed and seed layer thickness on seed filling performance were studied by single factor simulation test. The results showed that the seed filling performance was better when the seed agitator's rotational speed and seed layer thickness were 3 rad/s and between 35 and 40 mm respectively. The research results provided a reference for improving the structure and seed filling performance of seed metering device.

Key words: Seed metering device, CFD-DEM, Movement characteristics, Seed filling performance

Tong Hu, Xindan Qi, Hua Li , Song Yang, Yongjian Wang, Suyang Xu, Mingchao Bai. Seed movement characteristics and filling performance of seed metering device for baby bok choybased on CFD-DEM approach Seed movement characteristics and filling performance of seed metering device for baby bok choy based on CFD-DEM approach^*[J]. Journal of Intelligent Agricultural Mechanization (in Chinese and English), 2020, 1(1): 32-43.

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Seed movement characteristics and filling performance of seed metering device for baby bok choybased on CFD-DEM approach Seed movement characteristics and filling performance of seed metering device for baby bok choy based on CFD-DEM approach^*

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