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Design and optimization of an airflow-vibration sieving device for the effective cleaning of cyperus esculentus *** mixture

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International Journal of Agricultural and Biological Engineering 2024年第4期17卷 77-88页

作者： Shan Chen Shiguan An Za Kan Lidong Huang hewei meng Jiangtao Qi Huijie Peng College of Mechanical and Electrical Engineering Shihezi UniversityShihezi 832000XinjiangChina Engineering Research Center for Production Mechanization of Oasis Special Economic Crop Ministry of EducationShihezi 832000XinjiangChina Guilin Mike Machinery Co. LtdGuilin 541000GuangxiChina

The threshing mixture of Cyperus esculentus(Tiger nut)planted in sandy areas is complex during harvesting,and there are problems of high impurity rate and high cleaning loss rate of the *** this paper,the threshing mixture of Cyperus esculentus is taken as the research object,and the suspension speed of each component is measured to design an“airflow+vibration”sieving *** the vector polygon method to explore the law of motion of the vibrating sieve,establish the force model of the seeds on the sieve surface,and analyze the conditions for the seeds to penetrate the *** to the principle of seeds penetrating the sieve and long stalks not penetrating the sieve,the geometric model of sieve blades opening degree adjustment mechanism is *** of the conditions under which long stalks can be thrown out of the *** experiment bench of the cleaning device was built,and the evaluation indexes were the rate of seed impurity and the rate of cleaning loss of the device,and the crank speed,sieve blades opening degree and fan speed were used as the experiment factors to study the influence law of each influencing factor on the evaluation index through single-factor *** response surface methodology to find the optimal combination of working parameters of the cleaning *** verify the device’s application on the combine harvester to improve the effectiveness of the cleaning operation of the Cyperus esculentus combine harvester.

关键词： sand cultivation Cyperus esculentus wind sieve type cleaning device optimization

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肉苁蓉种子离散元仿真参数标定

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农机化研究 2025年第2期47卷 19-26,53页

作者：白志业蒙贺伟彭慧杰戚江涛李亚萍坎杂石河子大学机械电气工程学院新疆石河子832000

为寻求肉苁蓉种子离散元模型的物料特性参数,采用物理和仿真试验相结合的方法,以不同物性参数组合下肉苁蓉种子休止角为响应值,采用Plackett-Burman试验对参数进行筛选,获取显著性参数,即肉苁蓉种间静摩擦因数、肉苁蓉种间动摩擦因数、... 详细信息

为寻求肉苁蓉种子离散元模型的物料特性参数,采用物理和仿真试验相结合的方法,以不同物性参数组合下肉苁蓉种子休止角为响应值,采用Plackett-Burman试验对参数进行筛选,获取显著性参数,即肉苁蓉种间静摩擦因数、肉苁蓉种间动摩擦因数、肉苁蓉种子-钢板静摩擦因数、肉苁蓉种子-钢板恢复系数。通过Box-Behnken试验建立休止角与显著性参数回归模型并优化,获取接触参数最优值,即肉苁蓉种间静摩擦因数为0.65、肉苁蓉种间动摩擦因数为0.07、肉苁蓉种子-钢板恢复因数为0.54、肉苁蓉种子-钢板静摩擦因数为0.43。通过仿真与物理试验对比验证,得到二者相对误差为2.05%,表明标定参数可为肉苁蓉种子播种机械仿真提供数据依据。

关键词：肉苁蓉种子休止角离散元参数标定播种机械

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果园厩肥深施机土肥混合覆土装置设计与试验

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石河子大学学报（自然科学版） 2024年第4期42卷 422-430页

作者：戚江涛牛扬张纪元彭慧杰李明睿蒙贺伟石河子大学机械电气工程学院新疆石河子832000 农业农村部西北农业装备重点实验室新疆石河子832000

针对果园厩肥传统深施方式存在肥料过于集中、利用率低等问题,本文设计了一种土肥碰撞混合覆土装置,主要由开沟机构、导流机构、排肥机构等组成;进行了螺旋搅龙输肥机构内厩肥颗粒的运动学分析以及切削抛送过程、导流分层过程土壤颗粒... 详细信息

针对果园厩肥传统深施方式存在肥料过于集中、利用率低等问题,本文设计了一种土肥碰撞混合覆土装置,主要由开沟机构、导流机构、排肥机构等组成;进行了螺旋搅龙输肥机构内厩肥颗粒的运动学分析以及切削抛送过程、导流分层过程土壤颗粒运动学分析,确定了关键参数范围,并以刀盘转速、搅龙转速和分土板偏角为因素、以土肥混合均匀度为评价指标进行台架试验,结果表明刀盘转速、搅龙转速和分土板偏角分别为152 r·min^(-1)、138 r·min^(-1)和29°时土肥混合均匀度为86.39%;对最优参数组合进行试验验证,结果显示混合均匀度为88.02%,与理论结果的相对误差为1.89%,表明该装置混合性能较好,可满足土肥混合作业要求。该研究结果可为土肥混合机械设计提供技术依据。

关键词：农业机械厩肥混合覆土

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Operation power consumption and verification tests of a trenching device for orchards in Xinjiang based on discrete element

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International Journal of Agricultural and Biological Engineering 2021年第1期14卷 133-141页

作者： Chen Ma Jiangtao Qi Za Kan Shaojie Chen hewei meng College of Mechanical and Electrical Engineering Shihezi UniversityShihezi 832000XinjiangChina College of Mechanical and Electronic Engineering Xinjiang Vocational UniversityUrumqi 830013China Key Laboratory of Northwest Agricultural Machinery of the Ministry of Agriculture Shihezi 832000XinjiangChina Ruiyida Machinery Equipment Co. Ltd.Shihezi Development ZoneShihezi 832000XinjiangChina

According to the agronomic requirements of orchard planting pattern and fertilization in Xinjiang,the soil particle models and a soil-trenching device interaction model were established by using discrete element simulation software in order to find out the law of influence of structure parameters and working parameters on the operation power consumption of a segmented cutting trenching device;moreover,its cutting process was simulated according to the response surface test *** to the results of research on the influence of forward speed,cutter disk speed and cutter disk combination on the operation power consumption of the segmented cutting trenching device,the law of their influence on the operation power consumption in descending order is forward speed,cutter disk combination,cutter disk *** to the response surface test result,the following influential factor parameter combination has been obtained:forward speed 815 m/h,cutter disk speed 112 r/min,cutter disk combination A(cut angle 150°,bent angle 60°and working width 133 mm),cutter disk combination B(cut angle 180°,bent angle 90°and working width 166 mm),and trenching operation power consumption-optimization results were verified through field *** to the verification,the results showed a high accuracy of the simulation,with a relative error mean of 3.18%between the theoretical value and the field test *** study can provide a reference for the energy-saving design of orchard trenching devices.

关键词： trenching device discrete element orchard power consumption simulation analysis parameter optimization

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Calibration of the simulation parameters of jujubes in dwarfing and closer cultivation in Xinjiang during harvest period

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International Journal of Agricultural and Biological Engineering 2022年第2期15卷 256-264页

作者： Shiqi Yao Gaokun Shi Baoshuai Wang Huijie Peng hewei meng Za Kan College of Mechanical Electrical Engineering Shihezi UniversityShihezi 832000XinjiangChina Key Laboratory of Northwest Agricultural Equipment Ministry of Agriculture and Rural AffairsShihezi 832000XinjiangChina

order to obtain accurate contact parameters of jujubes in dwarfing and closer cultivation in Xinjiang during the harvest period,based on the Hertz-Mindlin(no-slip)contact model in EDEM,the contact parameters,including the coefficient of restitution,static friction,and rolling friction,between jujube and machine components have been calibrated through physical and simulation *** coefficient of restitution,static friction,and rolling friction between the jujubes and steel(jujube-steel)were calculated as 0.33,0.46,and 0.04,*** coefficient of restitution,static friction,and rolling friction between the jujubes and polyvinyl chloride(PVC)(jujube-PVC)were calculated as 0.39,0.61,and 0.06,*** optimum contact parameters among jujubes(inter-jujubes)were 0.23,0.33,and *** accumulation test was applied for comparing the simulation and testing values of jujube’s repose *** the results,the relative error was 1.27%which means the discrete element model and the contact parameters of jujube can be used for the discrete element simulation *** addition,the results can be adequately used to simulate particle scale mechanics(grain commingling,flow/motion,forces,etc.)of jujube in harvest as well as the design and working mechanism study of post-harvest processing machinery and devices.

关键词： jujube EDEM contact parameter experiment calibration

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Calibration and test of the contact parameters for chopped cotton stems based on discrete element method

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International Journal of Agricultural and Biological Engineering 2022年第5期15卷 1-8,F0003页

作者： Rongqing Liang Xuegeng Chen Bingcheng Zhang Xinzhong Wang Za Kan hewei meng College of Mechanical and Electrical Engineering Shihezi University Shihezi 832000XinjiangChina Engineering Research Center for Production Mechanization of Oasis Special Economic Crop Ministry of EducationShihezi 832000XinjiangChina School of Agriculture Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

In view of the fact that the existing cotton stem simulation models are simplified and have a large discrepancy from the actual appearance and the contact parameters have not been *** this study,the simulation model and numerical simulation were established using the discrete element software *** a second-order response model between contact parameters and repose angle had been *** test result showed that the static friction coefficient,rolling friction coefficient,and coefficient of restitution between cotton stems were crucial factors affecting the repose *** determination coefficient corrected determination coefficient and p-value of the second-order response model were R^(2)=0.959,R^(2)_(adj)=0.921,and p<0.0001 *** error values of the comparison between the simulation test results and the corresponding physical test values were all less than 10%,which showed that the model was reliable and had high interpretation and predictability,this study can provide a certain theoretical basis and data support for the setting of contact parameters in the data simulation of cotton stem harvesting and processing,mechanically-harvested film residue crushing and film stem separation,etc.

关键词： discrete element method cotton stem repose angle contact parameters calibration

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Calibration of the simulation parameters of the particulate materials in film mixed materials

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International Journal of Agricultural and Biological Engineering 2020年第4期13卷 29-36页

作者： Rongqing Liang Xuegeng Chen Peng Jiang Bingcheng Zhang hewei meng Xiangbin Peng Za Kan College of Mechanical Electrical Engineering Shihezi UniversityShiheziXinjiang 832000China Key Laboratory of Northwest Agricultural equipment Ministry of Agriculture and Rural AffairsShiheziXinjiang 832000China

In order to obtain accurate contact parameters of a particulate material in residual film mixture collected by cotton field machine in Xinjiang,the angle of repose test and inclined plane test were carried *** the tests,the angles of repose of the particulate material with the water content of(6.26±1.5)%and(14.1±2.1)%were measured respectively,as well as the static sliding friction angle between the particulate material and the residual *** the same time,the EDEM software was used to calibrate the coefficient of restitution,static friction coefficient and dynamic friction coefficient between the material and the ***,the second-order response model between contact parameters and the angle of repose and static sliding friction angle was *** addition,the optimal contact parameters between the granular materials and the mulch were obtained by fitting the physical test *** results indicated that the errors between the physical test results and the numerical simulation results are *** was proved that the second-order response model could predict the repose angle of granular materials and the static sliding friction angle between granular materials and farmland *** study could provide theoretical support for the subsequent model construction of the residual film mixture collected by the cotton field machine.

关键词： cotton field agricultural film particulate material EDEM contact parameter response model calibration

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Cotton stalk restitution coefficient determination tests based on the binocular high-speed camera technology

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International Journal of Agricultural and Biological Engineering 2022年第4期15卷 181-189页

作者： Bingcheng Zhang Xuegeng Chen Rongqing Liang Jiali Li Xinzhong Wang hewei meng Za Kan College of Mechanical and Electrical Engineering ShiHezi University Shihezi 832000XinjiangChina School of Agriculture Engineering Jiangsu University Zhenjiang 212013JiangsuChina Engineering Research Center for Production Mechanization of Oasis Special Economic Crop Ministry of EducationShihezi 832000China

The restitution coefficient(RC)of cotton stalks is an important elementary physical parameter that is required to establish the crushing mechanical model and research the film residue separation *** this study,the calculation method of restitution coefficient considering the rotation motion of stalk-shaped agricultural materials was derived based on the principle of kinematics and the energy restitution coefficient method,and a test bench for measuring the RC was designed and *** effects of collision material,moisture content,length,diameter,release height,and collision angle respectively on the RC were investigated by single-factor experiments and orthogonal experiments,and the regression models between influence factors and the RC were *** results showed that Q235 showed the highest value of the RC,and it was followed by cotton stalks and soil lumps,*** RC of cotton stalks decreased with the increase of moisture content and diameter,while it increased at first and then decreased with the increase of *** the release height was less than 500 mm,the RC increased with the increased release *** the collision angle was less than 40°,the RC showed a linear increasing *** significance of the effects of factors on RC decreased with the following sequence:collision angle,length,release height,diameter,and moisture ***,collision angle,and release height were extremely *** contrast test results showed that the values based on Newton’s restitution coefficient method were smaller than that based on the energy restitution coefficient *** verification test showed that the predicted rebound height of cotton stalks calculated based on the energy restitution coefficient method was closer to the actual rebound height,and the relative error was less than 5%.

关键词： high-speed camera technology cotton stalk collision restitution coefficient determination test

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Design and test of a multi-edge toothed cutting device for membraneimpurity mixed material

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International Journal of Agricultural and Biological Engineering 2023年第2期16卷 73-84页

作者： Rongqing Liang Bingcheng Zhang Xuegeng Chen hewei meng Xinzhong Wang Congju Shen Yaping Li Za Kan College of Mechanical and Electrical Engineering ShiHezi UniversityShihezi 832000XinjiangChina School of Agriculture Engineering Jiangsu University Zhenjiang 212013JiangsuChina Engineering Research Center for Production Mechanization of Oasis Special Economic Crop Ministry of EducationShihezi 832000XinjiangChina College of Energy and Machinery Dezhou UniversityDezhou 253023ShandongChina

As the existing residual film crushing device in Xinjiang cannot directly crush membrane-impurity mixed material,by analyzing the compressive and cutting force characteristics of residual film material layer and cotton stalk,the cutting conditions of mixed materials were obtained,and the method of cutting was determined.A multi-edge toothed cutters was created,and a cutting device was *** was preliminarily determined that the number of teeth in the cutters was 8,the clearance between the teeth and between the tooth and fixed blade was 3 mm,the speed of the high-speed cutter was 800 r/min,and the speed difference between the high-and low-speed cutters was-300 r/*** results show that the ratio of residual film to total residual film sampling mass was(2.22±0.30)%,(19.19±2.02)%,(58.94±3.19)% and(20.65±2.05)%,respectively,when the maximum outer profile size in the range of[0,20)mm,[20,100)mm,[100,500)mm and[500,~)*** mass of cotton stalks with lengths of[0,50)mm,[50,100)mm and[100,~)mm accounted for(32.57±1.5)%,(27.77±1.3)%and(39.66±1.75)%,respectively,and the cutting power consumption was(85.41±15.63)*** test results can provide a basis for the subsequent membrane-impurity mixed material cutting technology,as well as some guidance for the separation of it.

关键词： Multi-edge toothed cutter membrane-impurity mixed material cutting device cutting conditions

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等径变螺距奶牛精确饲喂给料装置设计与试验

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农业工程学报 2011年第3期27卷 103-107页

作者：蒙贺伟高振江坎杂林海石河子大学机械电气工程学院石河子832000 中国农业大学工学院北京100083

要实现奶牛精细饲喂必须保证装备的给料精度,该文通过对传统给料装置进行研究,设计了基于等径变螺距的奶牛精确饲喂螺旋给料装置,并对不同螺旋主轴转速和投料时间对试验装置的投料稳定性影响进行了试验研究,确定了螺旋主轴转速并拟合出... 详细信息

要实现奶牛精细饲喂必须保证装备的给料精度,该文通过对传统给料装置进行研究,设计了基于等径变螺距的奶牛精确饲喂螺旋给料装置,并对不同螺旋主轴转速和投料时间对试验装置的投料稳定性影响进行了试验研究,确定了螺旋主轴转速并拟合出装置的投料模型。试验结果表明,给料装置在150r/min转速下投料最稳定,投料精度高于95%,最大投料时间11s,满足奶牛精细饲养给料精度的要求。

关键词：变螺距奶牛精确饲喂给料装置

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