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Critical equation of seedling block falling off in transplanting process and the optimization experiment of rape blanket seedling transplanter

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International Journal of Agricultural and Biological Engineering 2019年第5期12卷 87-96页

作者： Lan Jiang chongyou wu Qing Tang Min Zhang Gang Wang Jun wu Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China

Considering both high efficiency and high seedling standing quality is a significant objective for crop mechanized *** blanket seedling transplanting is an innovative and efficient transplanting ***,falling off phenomenon has become a common problem facing rape blanket seedling transplanting fields that causes seedling standing quality decrease and restricts crop *** this study,the rape blanket seedling of Ningza-1838 varieties and 35 d of seedling age was taken as the research *** critical falling off equations of seedling was established by dynamic *** factors affecting seedling falling off were *** critical value of each factor was calculated which were as follows:the rotation speed of the planting mechanism was 24.6 rad/s,the substrate moisture content was 50.4%and the longitudinal picking seedling quantity was 14.7 *** the seedling falling off rate as evaluation index,the measured critical value of seedling falling off was determined by high speed photography *** the condition that substrate moisture content was 55%and the longitudinal seedling quantity was 15 mm,the seedling falling off rate sharply increased when the transplanting mechanism rotation speed was increased from 24 rad/s to 26 rad/*** the condition that the rotation speed was 22 rad/s and the longitudinal picking seedling quantity was 15 mm,the seedling falling off rate rapidly decreased when the moisture content was increased from 47%to 53%.When moisture content exceeded 53%,this exhibited no obvious *** the condition that the moisture content was 50%and the rotation speed was 22 rad/s,the seedling falling off rate swiftly raised when the longitudinal picking seedling quantity was increased from 14 mm to 17 *** experimental results showed that the seedling falling off rate increased significantly near the critical *** experimental results showed that the seedling falling off rate changed signific

关键词： rape blanket seedling transplanter planting mechanism seedling falling off

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Simulation and analysis of the pneumatic recovery for side-cutting loss of combine harvesters with CFD-DEM coupling approach

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International Journal of Agricultural and Biological Engineering 2022年第2期15卷 117-126页

作者： Tao Jiang Min Zhang Zhuohuai Guan Senlin Mu chongyou wu Gang Wang Haitong Li Nanjing Institute of Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China Synergistic Innovation Center of Jiangsu Modern Agricultural Equipment and Technology Zhenjiang 212013JiangsuChina

A novel pneumatic recovery method was proposed to curb the problem of high losses caused by side-cutting in a rapeseed combine harvester *** influence of recovery method and material status changes on the recovery effect was studied via the CFD-DEM(computational fluid dynamic-discrete element method)coupling *** effect of airflow action on the recovery effect was compared and analyzed,and the composite pneumatic recovery method was *** addition,the influence of material status changes and material feeding rate on the recovery effect was explored,and the critical condition of material blockage in the recovery device was *** such,the relationship model between air velocity and recovery rate was constructed and the air distribution ratio of the flow field in the device under this condition was optimized,had verified the rationality of this pneumatic recovery method was verified by a series of field *** average rapeseed recovery rate of 92.95%was achieved with the application of the recovery device,and the total loss rate of the header reduced by 52.26%,which is of great significance in reducing the total loss rate of the combine harvesters and improving the operation performance of *** research results can provide a reference for the design of the header structure of a rape combine harvester.

关键词： rapeseed combine harvester side-cutting loss coupled simulation pneumatic recovery

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Effects of harvesting method and date on yield loss and seed quality of rapeseed

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Oil Crop Science 2019年第3期4卷 166-174页

作者： Min Zhang chongyou wu Mei Jin Senlin Mu Suning Liang Qing Tang Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture and Rural Affairs

China is one of the major rapeseed production countries in the world,but harvesting mechanization was still backward,and high harvest loss was a key inhibiting factor for rapeseed *** obtain optimum harvesting date for winter rape in the Yangtze River Valley of China,artificial simulated combine harvesting and artificial two-stage harvesting were adopted to find correlations between harvesting date,rape variety,seed oil content,protein content,grain moisture rate,rapeseed straw moisture content,rapeseed unthreshing rate,grain drop loss rate,thousand seeds weight(TSW),and harvesting economic coefficient(HEC).Analysis of variance showed that rapeseed oil content,protein content and TSW were correlated with rape variety;HEC was correlated with harvesting method and rape *** variety was the dominant factor of rapeseed oil content,protein content,TSW and *** moisture rate,un-threshing rate,grain drop loss rate and straw moisture content were correlated with harvesting method and *** date was the dominant factor of rapeseed moisture rate,un-threshing rate,grain drop loss rate and straw moisture *** factor tests further proved that harvesting date had less impact on rapeseed oil content,protein content,TSW and *** showed little correlation with rapeseed quality except grain moisture *** optimum harvesting date could be known by change in straw moisture *** combined harvesting should be carried out during the grain moisture content of 15%-20%with TSW stabilized in the highest *** twostage harvesting cutting should be carried out at the grain moisture content of 35%-40%.This research offered a reference to harvesting method and date for rape cultivated in the Yangtze River Valley.

关键词： winter oilseed rape (Brassica napus L.) combine harvesting two-stageharvesting yield loss seed quality

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2BSF-4型种水同位施肥坐水播种机

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农业机械学报 2007年第7期38卷 71-74页

作者：金诚谦吴崇友农业部南京农业机械化研究所

在分析2BSF-4型种水同位施肥坐水播种机技术参数和工作原理的基础上,研究了种水同位穴播-间歇注水装置的工作过程和工作机理,研制了穴播装置同步信号发生器、间歇注水装置受信执行器。穴播排种过程中产生的同步信号传输给间歇注水装置... 详细信息

在分析2BSF-4型种水同位施肥坐水播种机技术参数和工作原理的基础上,研究了种水同位穴播-间歇注水装置的工作过程和工作机理,研制了穴播装置同步信号发生器、间歇注水装置受信执行器。穴播排种过程中产生的同步信号传输给间歇注水装置并控制其动作,使两者频率相同,相位协调。配以活门机构,使水和种子同时落入播种开沟器后方的动态土壤空穴中,有效保障种、水同位,真正实现穴播、穴灌。在作业过程中,联合检测落种和注水情况,防止漏播和漏灌。

关键词：坐水播种种水同位性能检测

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Research on vibration reduction test and frame modal analysis of rice transplanter based on vibration evaluation

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International Journal of Agricultural and Biological Engineering 2022年第32期15卷 116-122页

作者： Xin Jin Qun Cheng Qing Tang Jun wu Lan Jiang chongyou wu Huankun Wang Nanjing Institute of Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471003China Science&Technology Innovation Center for Completed Set Equipment Longmen LaboratoryLuoyang 471000China

The chassis of rice transplanter tends to vibrate severely in the severe working environment,causing a severe effect on the operational performance and driving *** order to avoid this situation,this paper constructs a vibration evaluation system of the rice transplanter and carries out experimental *** to the optimal acceleration sensor placement scheme,a test platform system was *** the high-speed transplanter chassis as the research object,this study carried out the experiments modal analysis and optimization on the *** three-dimensional model of the transplanting machine chassis established by SolidWorks was imported into ANSYS Workbench for finite element modal simulation *** the two modal analyses,it is found that the results data of the two analysis methods were very *** optimization,the length x1,the section width x2 and the thickness of the hollow beam x3 of the main load-bearing beam of the frame were as follows:x1=1641.5 mm,x2=26.7 mm,x3=5 mm,*** maximum overshoot of the low-level system was reduced by 28.57%.It has been verified that the vibration of the whole machine has been effectively reduced.

关键词： chassis high-speed rice transplanter vibration evaluation modal analysis

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油菜联合收获与分段收获效果比较

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农业工程学报 2014年第17期30卷 10-16页

作者：吴崇友肖圣元金梅农业部南京农业机械化研究所南京210014 合肥市农业科学研究院合肥238014

为了研究油菜联合收获与分段收获2种收获方式的差异,采用人工模拟联合收获和分段收获方法,对2种收获方式收获效果进行对比试验,对不同收获时间的收获经济系数、籽粒和茎秆含水率、收获损失率以及菜籽品质进行测试。同时通过2种收获机具... 详细信息

为了研究油菜联合收获与分段收获2种收获方式的差异,采用人工模拟联合收获和分段收获方法,对2种收获方式收获效果进行对比试验,对不同收获时间的收获经济系数、籽粒和茎秆含水率、收获损失率以及菜籽品质进行测试。同时通过2种收获机具进行田间生产试验,对2种收获方式的机具性能、经济性、适应性等方面进行全面的比较分析。结果表明:人工模拟分段收获平均损失率为3.2%,比人工模拟联合收获(平均损失率6.51%)下降50.8%,菜籽含油量和蛋白质含量没有明显差别。机械化分段收获比联合收获每公顷经济效益提高361元,腾地时间提早4.8 d,对作物适应性强,籽粒和秸秆含水率较低,利于菜籽保存和秸秆粉碎,但存在机器2次下地作业,适应阴雨天能力差等缺点。联合收获具有便捷、高效的优点,但对作物适应性差,损失率高。通过比较分析得出2种收获方式的优缺点,为油菜收获方式的选择以及油菜机械化的发展方向提供参考依据。

关键词：农业机械收获试验油菜比较

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穴灌坐水播种机水阀结构参数优化与试验

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农业机械学报 2006年第9期37卷 64-67,78页

作者：王利强吴崇友江南大学机械工程学院农业部南京农业机械化研究所现代农业生产装备中心

为解决坐水播种作业中种子与施水同位问题,提出了种、液同时播施的机械化坐水播种作业工艺,并对水路系统进行分析设计,建立了设计参数的数学模型,通过对模型的优化求解,获得了作业要求范围内水阀的设计参数。在此基础上进行了播种整机... 详细信息

为解决坐水播种作业中种子与施水同位问题,提出了种、液同时播施的机械化坐水播种作业工艺,并对水路系统进行分析设计,建立了设计参数的数学模型,通过对模型的优化求解,获得了作业要求范围内水阀的设计参数。在此基础上进行了播种整机的结构设计,并对单体进行了室内性能测试。试验表明,该机平均穴灌水量为94.5mL/穴,种子离穴灌水湿润中心距平均为14.2mm,穴粒数平均1.64粒,平均粒距27.5cm,重播指数小于1.48%,漏播指数不高于2.21%。试验单体各项测试性能均达到了设计要求。

关键词：坐水播种机参数优化性能试验

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吸盘式水稻育秧播种器吸孔气流场仿真分析

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农业工程学报 2011年第7期27卷 162-167,I0002页

作者：张敏吴崇友张文毅农业部南京农业机械化研究所南京210014

为分析吸盘式水稻育秧播种器工况参数和吸孔结构参数对种子吸附性能和吸孔堵塞的影响,运用ANSYS12.0/Fluent软件对3种形式的吸孔在不同边界条件下的气流场进行仿真分析。数值模拟正交试验和单因素试验分析表明吸孔导程对吸孔吸种空穴率... 详细信息

为分析吸盘式水稻育秧播种器工况参数和吸孔结构参数对种子吸附性能和吸孔堵塞的影响,运用ANSYS12.0/Fluent软件对3种形式的吸孔在不同边界条件下的气流场进行仿真分析。数值模拟正交试验和单因素试验分析表明吸孔导程对吸孔吸种空穴率和重吸率的影响较小,但减少吸孔导程有利于减少吸孔堵塞;吸种孔最大吸种距离在2mm左右;仿真结果与室内试验结果吻合。该研究对吸盘式水稻育秧播种器吸种孔优化设计和工作参数选择有参考价值。

关键词：播种流场模拟吸盘式吸孔吸种性能 CFD

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油菜耕整移栽联合作业机液压仿形系统设计与试验

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农业机械学报 2021年第11期52卷 95-102页

作者：汤庆吴俊蒋兰吴崇友肖体琼江涛农业农村部南京农业机械化研究所南京210014

油菜栽植深度一致性是评价移栽质量的重要指标,其直接影响秧苗缓苗和根系再生,以及油菜产量。为了提高油菜耕整移栽联合作业机栽植深度一致性,设计了基于仿形轮高度感应与液压联动的仿形系统。开展了±25 mm起伏高度的模拟路面仿形轮和... 详细信息

油菜栽植深度一致性是评价移栽质量的重要指标,其直接影响秧苗缓苗和根系再生,以及油菜产量。为了提高油菜耕整移栽联合作业机栽植深度一致性,设计了基于仿形轮高度感应与液压联动的仿形系统。开展了±25 mm起伏高度的模拟路面仿形轮和栽植器在不同前进速度下轨迹与相位试验,结果显示前进速度分别为0.3、0.6、0.9、1.2 m/s时,仿形轮和栽植器的轨迹变化趋势与路面一致,相位均有延迟,幅值分别下降5.8%、15.2%、17.7%、33.8%和14.9%、21.5%、41.5%、54.6%,相位差分别为0.0267、0.0119、0.0225、0.0366 s和0.182、0.1264、0.1278、0.1489 s。以前进速度、栽植单元质量、地面起伏高度差为影响因素,以栽植深度合格率为试验指标,进行三因素五水平二次正交旋转组合设计试验。试验结果表明因素影响强弱次序为:栽植单元质量、地面起伏高度差、前进速度,经寻优得最优参数为:栽植单元质量30 kg,地面起伏高度差20 mm,前进速度1 m/s,此参数组合下栽植深度合格率为90.27%,优于标准值,表明液压仿形系统可以有效控制栽深,提高栽深一致性。

关键词：油菜耕整移栽联合作业机液压仿形栽植合格率

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谷物收获机切割机构研究现状与展望

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中国农机化学报 2019年第2期40卷 25-34页

作者：冉军辉吴崇友农业农村部南京农业机械化研究所南京市210014

我国油菜机械化收获割台切割振动大,引起作业效率低、质量差、落粒损失大等一系列问题。针对这些问题,为寻求稳定、高效的切割机构,对国内外可用于油菜收获的不同类型谷物收获切割机构的应用及研究现状总结分析。对在不同传动机构驱动... 详细信息

我国油菜机械化收获割台切割振动大,引起作业效率低、质量差、落粒损失大等一系列问题。针对这些问题,为寻求稳定、高效的切割机构,对国内外可用于油菜收获的不同类型谷物收获切割机构的应用及研究现状总结分析。对在不同传动机构驱动下的割刀各项性能指标进行详细对比,最后提出存在的问题及对今后油菜收割机切割机构的研究方向和建议。

关键词：油菜谷物收获机械切割器双动刀驱动机构

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