您好，欢迎访问新疆农垦科学院 机构知识库！
新疆农垦科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Design and Experimental Analysis of an Air-Suction Wheat Precision Hill-Seed Metering Device

文献类型： 外文期刊

作者： Fang, Ziheng 1 ; Zhang, Jing 1 ; Chen, Jincheng 1 ; Pan, Feng 1 ; Wang, Baiwei 1 ; Ji, Chao 1 ;

作者机构： 1.Xinjiang Acad Agr & Reclamat Sci, Inst Mech Equipment, Shihezi 832000, Peoples R China

2.Shihezi Univ, Coll Mech & Elect Engn, Shihezi 832003, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Northwest Agr Equipment, Shihezi 832003, Peoples R China

关键词： precision seeding device for wheat; discrete element method (DEM); fluid simulation; DEM-CFD coupling; response surface methodology

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN：

年卷期： 2024 年 14 卷 11 期

页码：

收录情况： SCI

摘要： The uniformity of the wheat distribution within and between rows has a significant effect on crop population structure, leading to decreased yield as nonuniformity increases. Traditional drills are influenced by soil porosity and flatness in the field, making accurate control of sowing depth and amount challenging and resulting in an uneven spatial distribution of gramineous seedlings. Precision cave-sowing technology effectively enhances wheat population distribution uniformity. However, owing to limitations in existing mechanical precision cave planters, their operational speed is lower than that of drill planters. To address these issues, this study designed an air-suction precision wheat seed dispenser, described its basic structure and working principle, and developed a seed mechanical model. A theoretical analysis was conducted on the working process and key components of the seed feeder. A suitable mould hole diameter was determined to be 1.6 similar to 2.0 mm, and the rotation speed range for the seed plate was found to be 65 similar to 85 r.min(-1). Fluent simulations were used to determine the influence of orifice type on gas chamber flow fields; DEM-CFD-coupled simulation identified an appropriate negative pressure range of 2.6 similar to 3.4 kPa for optimal performance during seeding operations. Orthogonal experiments were carried out with mould hole diameter, negative pressure size, and seed plate speed as test factors alongside a qualification index, multiple sowing index, and missed sowing index as response indicators-leading to regression equation establishment, which yielded the optimal parameter combination: mould hole diameter at 1.8 mm; gas chamber negative pressure at 3.2 kPa; and a seed plate speed of 74 r.min(-1), with the corresponding forwards speed of the machine being 7 km.h(-1)-resulting in a qualification index of 91.66%, multiple sowing index of 5.98%, and missed sowing index of 2.36%. This pneumatic suction type wheat precision seeder achieves equivalent operational speeds as traditional drills while enabling precision seeding.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：新疆农垦科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台