刘彩玲,都鑫,张福印,马拓,张皓瑒,黎艳妮.锥面导流水平盘式小麦精量排种器设计与试验[J].农业机械学报,2018,49(12):56-65.
LIU Cailing,DU Xin,ZHANG Fuyin,MA Tuo,ZHANG Haoyang,LI Yanni.Design and Test of Cone Diversion Type Horizontal Plate Wheat Precision Seed-metering Device[J].Transactions of the Chinese Society for Agricultural Machinery,2018,49(12):56-65.
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锥面导流水平盘式小麦精量排种器设计与试验   [下载全文]
Design and Test of Cone Diversion Type Horizontal Plate Wheat Precision Seed-metering Device   [Download Pdf][in English]
投稿时间:2018-07-12  
DOI:10.6041/j.issn.1000-1298.2018.12.007
中文关键词:  小麦  排种器  渐开线导条  离散元法  设计  试验
基金项目:国家重点研发计划项目(2016YFD0200607)
作者单位
刘彩玲 中国农业大学 
都鑫 中国农业大学 
张福印 中国农业大学 
马拓 中国农业大学 
张皓瑒 中国农业大学 
黎艳妮 中国农业大学 
中文摘要:为实现小麦低播量精密播种,提高小麦精密排种器播种精度,提出了一种锥面导流水平盘式小麦排种器,对关键参数进行了设计和理论分析,通过EDEM离散元软件完成了导条型式、型孔个数、锥盘转速、锥盘锥角对充种性能影响的单因素试验。在此基础上以锥盘转速、种层厚度和型孔长度为试验因素进行了多元二次回归旋转正交组合试验并应用Design-Expert 8.0.6软件对试验数据进行分析,得到回归模型和因素对指标影响关系,确定了对单粒率影响由大到小依次为锥盘转速、型孔长度和种层厚度;对合格率影响由大到小依次为锥盘转速、种层厚度和型孔长度,转速和种层厚度、种层厚度和型孔长度间存在交互作用。基于回归模型进行多目标参数优化并对最优组合参数进行排种性能的台架试验验证,结果表明,在转速19r/min、型孔长度8mm、种层厚度为8mm时排种合格率为90.13%、漏充率为9.87%、单粒率为49.50%,与仿真优化结果相吻合,验证了仿真优化结果的可靠性。与原锥盘排种器的性能对比试验表明,设计的锥面导流水平盘式排种器在速度为3、4、5km/h时,合格率分别提高了3.4、2.1、1.9个百分点,3km/h时破碎率降低了0.2个百分点,无论排种性能还是破碎率指标均优于原锥盘排种器。
LIU Cailing  DU Xin  ZHANG Fuyin  MA Tuo  ZHANG Haoyang  LI Yanni
China Agricultural University,China Agricultural University,China Agricultural University,China Agricultural University,China Agricultural University and China Agricultural University
Key Words:wheat  seed-metering device  involute guide bar  discrete element method  design  test
Abstract:In order to achieve precision seeding of low sowing quantity of wheat and improve the accuracy of precision seeding of wheat, a kind of cone diversion type horizontal plate wheat precision seed-metering device was proposed. The design and theoretical analysis of key parameters were carried out. Single factor test on the effects of the guide bar form, number of holes, cone disc speed and cone disc angle on seed-filling performance were studied by EDEM discrete element software, and then the parameters were determined. On this basis, the multiple quadratic regression rotation orthogonal combination test was carried out with cone speed, seed-layer thickness and length of hole, and then the test data was analyzed by Design-Expert 8.0.6 software. The regression model and the influence of factors on the index were obtained. The influence relation of factors on the single rate was determined and the order of importance was the cone disc speed, length of hole and seed-layer thickness in turn. The order of importance of the qualified rate was the cone disc speed, seed-layer thickness and length of hole in turn. Interaction between the length of a hole and the seed-layer thickness, cone disc speed and seed-layer thickness cannot be ignored. Based on the regression model, the parameters were optimized and the seed metering device under the optimized parameter combination was tested for seed-metering performance. The results showed that the qualified seed-metering rate, the leakage rate and single rate was 90.13%, 9.87% and 49.50%, raspectively, and the test results matched the simulation optimization results. The reliability of the simulation optimization result was verified. The performance comparison tests with the original cone seed-metering device showed that the designed cone diversion type horizontal plate wheat precision seed-metering device was better than the original cone disc seed-metering device in both metering performance and breakage index. The qualified rate was increased by 3.4 percentage points, 2.1 percentage points and 1.9 percentage points at 3km/h, 4km/h and 5km/h, respectively, and the damage rate was decreased by 0.2 percentage point at 3km/h. The designed cone diversion type horizontal plate wheat precision seed-metering device can effectively improve seed filling performance and qualification index and reduce sowing quantity and breakage rate. The research results provided a reference for the design of wheat precision seeder used in wide seedling strip.

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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