摘要
为提高落地红枣收获效率,设计了一种以气吸捡拾为核心的红枣收获机。通过对红枣物料特性的测定、收获时所含杂物的物理特性分析以及收获过程中吸拾管道弯曲状态的探究,借助EDEM软件建立吸拾管道、红枣及主要杂物模型,并结合ANSYS软件Fluent模块对物料在最大和最小弯曲状态下吸拾管道中的运动分别进行流固耦合仿真。以含杂率、拾净率为机具评价指标,通过对影响机具性能的其它因素进行控制,展开吸拾管道最大和最小弯曲状态的对比试验。仿真结果显示:物料在管道弯曲程度最大、最小状态下最高速度分别接近10m/s、8m/s;对比试验结果显示:管道弯曲程度最大、最小状态下含杂率平均差值为0.15%,拾净率差值为0.27%。仿真结果和对比试验结果表明:机具所选吸拾管道的弯曲状态对机具性能影响较小,相对于物理特性差异较大的物料而言,可不做考虑。
In order to improve the harvest efficiency of landing jujubes,a jujube harvester with air suction picking as the core was designed.Through the determination of the material characteristics of jujube and the physical characteristics of the debris in the harvest,as well as the analysis of the bending state of the suction pipe in the harvest process;EDEM software was used to establish the suction pipe,jujube and main sundry objects model,combined with ANSYS Flunt software to carry out fluid-structure coupling simulation of material movement in the suction pipe under the maximum and minimum bending state.Taking the impurity rate and the clean rate as the evaluation index,and controlling the other factors that affect the performance of the machine and tools,the comparative test of the maximum and minimum bending state of the suction pipe is made.The simulation results show that the maximum speed of materials under the maximum and minimum bending conditions of the pipeline is close to 10 m/s and 8 m/s respectively.The comparison test results show that the average difference of impurity content under the maximum and minimum bending conditions of the pipeline is 0.15% and the difference of cleaning rate is 0.27%.Through the analysis of the simulation results and the comparative test results,it is concluded that the bending state of the selected suction pipe has little influence on the performance of the machine.
作者
杜许怀
韩长杰
朱雪峰
李光新
燕长辉
Du Xuhuai;Han Changjie;Zhu Xuefeng;Li Guangxin;Yan Changhui(College of Mechanical and Electrical Engineering,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《农机化研究》
北大核心
2023年第12期204-209,共6页
Journal of Agricultural Mechanization Research
基金
新疆维吾尔自治区重点研发计划项目(2017B01002-2)
新疆维吾尔自治区天山创新团队项目(2021D14010)
新疆农业大学研究生科研创新项目(XJAUGRI2019-016)。
关键词
红枣收获机
吸拾
物料特性
运动仿真
red jujube harvester
sution
material characteristics
motion simulation
