中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > Design and test of an inside-filling pneumatic precision centralized seed-metering device for rapeseed 国际农业与生物工程学报 2017,10 (2)
Position: Home > Articles > Design and test of an inside-filling pneumatic precision centralized seed-metering device for rapeseed International Journal of Agricultural and Biological Engineering 2017,10 (2)

Design and test of an inside-filling pneumatic precision centralized seed-metering device for rapeseed

作  者：
Yitao Liao;Lei Wang;Quan Lia
单  位：
Engineering College,Huazhong Agricultural University,Wuhan 430070,China;Engineering College,Huazhong Agricultural University,Wuhan 430070,China)
关键词：
pa;pneumatic;the prototype;precision;rapeseed;seed-metering devic
摘  要：
The pneumatic precision seed-metering devices used in combination with negative air pressure to suck seed and positive air flow to drop seed could overcome the problem of rapeseed precision planting. However, these devices can only plant a single row at a time or need high airflow pressure, which complicates the seed-metering system and the seeder structure, deteriorate the working reliability and have high power consumption. To overcome above shortcomings, a novel prototype of pneumatic precision centralized seed-metering device with seed inside-filling, sowing six rows at a time, was developed. The main structure and working principle of the prototype were described and the technical parameters were given. Experiments were conducted to investigate the influences of positive pressure, negative pressure, and rotating speed on the seeding performance. The stability of each row and the consistency between all rows associated with the seeding precision were analyzed to evaluate the performance of the prototype. The results indicate that the prototype can meet the requirements of precision seeding and the seeds keep intact without any obvious damage. The performance of the prototype was no significant difference when the positive pressure was fluctuated from 200 Pa to 1200 Pa. The best seeding precision parameters in one row of the prototype was 92.48% of the qualified seeding index (I-qs) and 2.55% of the missing-seeding index (I-miss), when the rotating speed was 16 r/min, the positive pressure was 200 Pa and the negative pressure was -1600 Pa. When the rotating speed was 16 r/min, the positive pressure was 200 Pa, and the negative pressure was -1400 Pa or -1600 Pa, the I-qs of six rows were above 86.5%, the stability coefficient of variation (CV) of each row were below 4.6%, and the consistency CV were below 0.9%. Further field experiment showed that the rapeseed sowed by the prototype had acceptable seeding precision. The CV of the numbers of rapeseed seedlings in the field of the total and each row were 6.17% and 6.32% respectively. The research confirmed that the inside-filling pneumatic precision centralized seed-metering device satisfied the agronomic requirements of rapeseed planting and can be a reference for the development of precision seed metering devices.

相似文章

导出引用
计量
文章访问数: 16
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46