气吸式谷子排种装置吸种孔的结构设计与试验

为实现气吸式谷子排种装置的精少量穴播,解决播种时伤种、吸种孔堵塞、成穴性差等问题,在研究了谷子机械物理特性的基础上,对气吸式排种装置的排种盘进行了设计,设计了圆柱孔、倒角截顶圆锥体孔、截顶圆锥体孔和四棱台孔4种结构,并对排种装置进行了谷子排种效果对比试验以及排种性能试验。试验结果表明,在所设计的多种排种盘结构中,吸种效果最好的排种盘吸种孔为四棱台结构,堵塞情况最少,相对成穴性最好,此时平均穴粒数3.3个,穴粒数合格率89%,穴距合格率94%,平均成穴距离1.24 cm。同时确定了排种器的最佳工作参数：真空度？2 k Pa,排种轴转速28 r/min。初步实现了采用气吸式排种装置下的谷子精少量穴...

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Bibliographic Details
Published in农业工程学报 Vol. 33; no. 8; pp. 30 - 36
Main Author 王芳 吕冰 王洪明 赵满全
Format Journal Article
LanguageChinese
Published 内蒙古农业大学机电工程学院,呼和浩特,010018 2017
Subjects
农业机械
吸种孔
气吸式排种装置
设计
试验
谷子
millet
设计
吸种孔
agricutural machinery
试验
气吸式排种装置
design
experiments
谷子
air -sucking seed- metering device
农业机械
suction hole
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Summary:为实现气吸式谷子排种装置的精少量穴播,解决播种时伤种、吸种孔堵塞、成穴性差等问题,在研究了谷子机械物理特性的基础上,对气吸式排种装置的排种盘进行了设计,设计了圆柱孔、倒角截顶圆锥体孔、截顶圆锥体孔和四棱台孔4种结构,并对排种装置进行了谷子排种效果对比试验以及排种性能试验。试验结果表明,在所设计的多种排种盘结构中,吸种效果最好的排种盘吸种孔为四棱台结构,堵塞情况最少,相对成穴性最好,此时平均穴粒数3.3个,穴粒数合格率89%,穴距合格率94%,平均成穴距离1.24 cm。同时确定了排种器的最佳工作参数：真空度？2 k Pa,排种轴转速28 r/min。初步实现了采用气吸式排种装置下的谷子精少量穴播,对以后设计谷子精密排种装置及相关研究提供参考。
Bibliography:11-2047/S
Wang Fang, Lv Bing, Wang Hongming, Zhao Manquan （College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China）
agricutural machinery; design; experiments; millet; air -sucking seed- metering device; suction hole
Millet is the main crop in China. At present, due to the lower mechanization level of millet cultivation in China, it is easy to damage seeds and clog suction holes when sowing. In view of the problem of poor hole formation, precision sowing has become a modem technological means to improve grain yield. In order to realize precision sowing, the mechanical and physical properties of three domestic typical millets were firstly studied by measuring size, sphericity degree and the maximum coefficient of static friction between the millet and the steel plate. And to make our design of the suction hole have a good adaptability, the comparative analysis was performed in the Jingu 21 millet. According to the physical characteristics of the millet, air -
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.08.004