首页 | 本学科首页   官方微博 | 高级检索  
     检索      

稻麦轮作区气动式小麦精准投种装置设计与试验
引用本文:王超,李洪文,何进,王庆杰,卢彩云,王景旭.稻麦轮作区气动式小麦精准投种装置设计与试验[J].农业机械学报,2020,51(5):43-53.
作者姓名:王超  李洪文  何进  王庆杰  卢彩云  王景旭
作者单位:中国农业大学工学院,北京100083;温州大学机电工程学院,温州325035
基金项目:现代农业产业技术体系建设项目(CARS-03)
摘    要:为实现稻麦轮作区黏湿土壤条件下的小麦精量播种,设计了一种气动式小麦精准投种装置,该装置通过气动加速将小麦种粒高速精准投置于清洁土壤内。以稳态气体流速、入口负压为试验指标,出气室直径、喉嘴距和接收室直径为影响因素,利用Fluent分析进行气动式小麦精准投种装置的关键结构参数设计。Fluent分析结果表明:该装置的较优组合为出气室直径为6 mm、喉嘴距为10 mm、接收室直径为32 mm,此时稳态气体流速为524 m/s,入口负压为15.966 kPa。较优参数组合下的投种性能台架试验结果表明:当作业速度为1.2 m/s、投种高度为0.1 m、进气室压力为0.5 MPa时,小麦种粒可高速冲击进入土壤,实现高速精准稳着床点播、且无破损,平均投种速度为43.8 m/s,平均投种深度6.78 mm,投种速度、投种深度变异系数分别为8.3%、5.8%,投种性能稳定。

关 键 词:稻麦轮作区  小麦  精准投种  气动式
收稿时间:2019/8/12 0:00:00

Design and Experiment of Pneumatic Wheat Precision Seed Casting Device in Rice-wheat Rotation Areas
WANG Chao,LI Hongwen,HE Jin,WANG Qingjie,LU Caiyun,WANG Jingxu.Design and Experiment of Pneumatic Wheat Precision Seed Casting Device in Rice-wheat Rotation Areas[J].Transactions of the Chinese Society of Agricultural Machinery,2020,51(5):43-53.
Authors:WANG Chao  LI Hongwen  HE Jin  WANG Qingjie  LU Caiyun  WANG Jingxu
Institution:China Agricultural University; Wenzhou University
Abstract:In order to realize wheat precision seeding under clay-wet soil conditions of rice-wheat rotation area, a pneumatic wheat precision seed casting device was developed that casting wheat to clean seedbeds fast and accurately by pneumatic acceleration. The influence of key structural parameters of outlet chamber diameter, throat distance and convergent chamber diameter on velocity of steady gas flow and inlet negative pressure, as test indicators, were studied by numerical simulation and analysis of Fluent software. Analysis results by Fluent showed that the parameter combination of pneumatic wheat precision seed casting device was as follows: diameter of outlet chamber was 6mm, throat distance was 10mm and convergent chamber diameter was 32mm obtained by single factor test as well as three factors and three levels orthogonal experiment. Under this parameter conditions, the velocity of steady gas flow was 524m/s and inlet negative pressure was 15.966kPa, by simulation. Wheat seed casting performance experiment, based on better parameter combination, by test-bed indicated that wheat seed can be casted into soil at high speed to achieve accurate and stable single seed sowing without damage while working speed was 1.2m/s, casting height was 0.1m and air pressure was 0.5MPa. Moreover, the average vesting velocity was 43.8m/s, average depth was 6.78mm, and the coefficient of variation of vesting velocity and average depth was 8.3% and 5.8%, respectively, which showed the stable performance of pneumatic seed casting.
Keywords:rice-wheat rotation areas  wheat  precision seed casting  pneumatic
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《农业机械学报》浏览原始摘要信息
点击此处可从《农业机械学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号