王金武,唐汉,王金峰,沈红光,冯鑫,黄会男.指夹式玉米精量排种器导种投送运移机理分析与试验[J].农业机械学报,2017,48(1):29-37,46.
WANG Jinwu,TANG Han,WANG Jinfeng,SHEN Hongguang,FENG Xin,HUANG Huinan.Analysis and Experiment of Guiding and Dropping Migratory Mechanism on Pickup Finger Precision Seed Metering Device for Corn[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(1):29-37,46.
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指夹式玉米精量排种器导种投送运移机理分析与试验   [下载全文]
Analysis and Experiment of Guiding and Dropping Migratory Mechanism on Pickup Finger Precision Seed Metering Device for Corn   [Download Pdf][in English]
投稿时间:2016-09-20  
DOI:10.6041/j.issn.1000-1298.2017.01.005
中文关键词:  玉米  指夹式精量排种器  导种投送  机理  试验
基金项目:“十二五”国家科技支撑计划项目(2014BAD06B04)
作者单位
王金武 东北农业大学 
唐汉 东北农业大学 
王金峰 东北农业大学 
沈红光 东北农业大学 
冯鑫 东北农业大学 
黄会男 东北农业大学 
中文摘要:为研究指夹式玉米精量排种器籽粒投送运移规律,提高排种器导种性能,建立了导种投送过程的运动学和动力学模型,分析了各因素对运移稳定性及投送落种轨迹的影响。采用多因素二次通用旋转组合试验研究了工作转速和倾斜角对排种均匀稳定性的影响,运用Design—Expert 6.0.10软件对试验数据进行优化分析得到其最佳工作条件。在此基础上,运用镜面反射成像原理,搭建了排种轨迹测定试验台,结合高速摄像与图像目标追踪技术对落种籽粒轨迹运移规律进行了研究。试验结果表明,在工作转速为15~45r/min、倾斜角为0°工况下,籽粒正面轨迹及侧面轨迹的水平位移随工作转速增加而增加,株距变异系数随工作转速增加而降低;当工作转速大于35r/min时,籽粒轨迹及落点位置分布逐渐离散,株距变异系数明显增加,其正面水平位移稳定在12.9~14.3mm内,侧面水平位移稳定在3.7~4.8mm内,平均株距变异系数为15.13%。在工作转速为30r/min、倾斜角为-12°~12°工况下,轨迹投种角随倾斜角的增加而减小,其整体角度稳定在66.4°~79.6°内。该研究为优化设计指夹式玉米精量排种器关键部件及配套导种管提供了参考。
WANG Jinwu  TANG Han  WANG Jinfeng  SHEN Hongguang  FENG Xin  HUANG Huinan
Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University and Northeast Agricultural University
Key Words:corn  pickup finger precision seed metering device  guiding and dropping seed  mechanism  experiment
Abstract:In order to improve the guiding migration performance of pickup finger precision seed metering device, the steady migratory mechanism of guiding-seed system was studied. The kinematics and dynamics models of guiding-seed and dropping-seed processes were established based on its working principle. The influences of various factors on dropping trajectory and migration stability were analyzed. The quadratic general rotary unitized design was carried out by taking the rotational speed of seed meter and tilt angle as experiment factors, and the seeding qualified index and variation coefficient as experiment indexes. Based on experimental data, a mathematical model was built by using the Design—Expert 6.0.10 software, and the experiment factors were optimized, the best combination was achieved. On this basis, a kind of dropping trajectory measuring test platform was designed and built based on the theory of mirror reflection. And then the three-dimensional space velocities of the falling corn were measured and analyzed by high-speed photography and target tracking technology. The single factor tests for factors, including rotational speed and tilt angle, were carried out and the corresponding regression equations were obtained by analysis. Experimental results showed that when the rotational speed was between 15r/min and 45r/min and the tilt angle was 0°, the horizontal displacements of trajectories of frontal and profile dropping seed were increased with the increase of rotational speed and the variation coefficient of seeding was decreased with the increase of rotational speed. As the rotational speed was greater than 35r/min, the trajectories and landing positions of corn grains were gradually discrete and the variation coefficient of seeding was significantly increased, and its horizontal displacements of frontal trajectory were stabilized within the range of 12.9~14.3mm, the horizontal displacements of profile trajectory were stabilized within the range of 3.7~4.8mm, and the average variation coefficient was 15.13%. The dropping seed angle was decreased with the increase of tilt angle at rotational speed of 30r/min and tilt angle of -12°~12°. The results can provide guidance and direction for the research of mechanical precision seed metering device and its seed tube.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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