基于DEM的玉米低损伤脱粒装置设计与试验

IF 2.2 2区 农林科学 Q2 AGRICULTURAL ENGINEERING
Xiaoyu Li, Yuefeng Du, Enrong Mao, Yan’an Zhang, Lei Liu, Dafang Guo
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引用次数: 0

摘要

碎粒率是评价玉米籽粒直接采收质量的重要指标。针对现有玉米收获机破碎率高的问题,设计了一种新型脱粒滚筒。该装置利用锉刀棒实现玉米穗的低损伤脱粒。为了确定脱粒装置的结构和工作参数,首先基于离散元法建立并分析了“作物-作物”接触模型和“作物-机械”相互作用系统,得到了玉米籽粒在外力作用下相关运动响应的数学表达式。然后,通过EDEM模拟实验研究了锉条的结构参数,并通过试验台实验确定了工作参数。最后,通过现场试验对仿真实验结果和试验台实验结果进行了验证。结果表明,当脱粒滚筒转速为356 r/min,凹间隙为40 mm,磨条安装距离为250 mm, 50Mn钢,给料量为8 kg/s时,籽粒破碎率为1.93%,满足玉米收获标准要求。本研究证明了采用离散元法(DEM)可以指导机械结构的优化设计,对其他农作物作业设备的研发具有一定的参考价值。关键词:DEM,玉米脱粒,低损收获,破粒率,仿真[DOI: 10.25165/ j.j ijabe.20231603.7042]引用本文:李晓燕,杜云峰,毛恩荣,张艳安,刘玲,郭德峰。基于DEM的玉米低损脱粒装置设计与试验农业与生物工程学报,2023;16(3): 55 - 63。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design and experiment of corn low damage threshing device based on DEM
Kernel broken rate is an important index to evaluate the maize kernel direct harvesting quality. In view of the problem of the high kernel broken rate in the present maize harvester, a new threshing cylinder was designed in this study. This device utilized rasp bar to achieve low damaged maize ears threshing. In order to determine the structure and working parameters of threshing device, the "crop-crop" contact model and the "crop-mechanical" interaction system were established and analyzed based on the discrete element method first, and the mathematical expressions of the related kinematic response of maize kernel under the external force were obtained. Then, the structure parameters of rasp bar were studied through EDEM simulation experiment, and the working parameters were determined through test-bed experiment. Finally, the simulation experiment results and test-bed experiment results were verified through field experiment. The results showed that when the threshing cylinder speed was 356 r/min, the concave clearance was 40 mm, the installation distance of rasp bar was 250 mm with 50Mn steel, and the feeding amount was 8 kg/s, the kernel broken rate was 1.93%, which satisfied the requirements of maize harvest standard. This study proved that the DEM (Discrete Element Method) can be adopted to guide the optimization design of mechanical structure, and it has certain value for the research and development of operation equipment of other agricultural crops. Keywords: DEM, maize threshing, low damage harvesting, kernel broken rate, simulation DOI: 10.25165/j.ijabe.20231603.7042 Citation: Li X Y, Du Y F, Mao E R, Zhang Y A, Liu L, Guo D F. Design and experiment of corn low damage threshing device based on DEM. Int J Agric & Biol Eng, 2023; 16(3): 55–63.
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来源期刊
CiteScore
4.30
自引率
12.50%
发文量
88
审稿时长
24 weeks
期刊介绍: International Journal of Agricultural and Biological Engineering (IJABE, https://www.ijabe.org) is a peer reviewed open access international journal. IJABE, started in 2008, is a joint publication co-sponsored by US-based Association of Agricultural, Biological and Food Engineers (AOCABFE) and China-based Chinese Society of Agricultural Engineering (CSAE). The ISSN 1934-6344 and eISSN 1934-6352 numbers for both print and online IJABE have been registered in US. Now, Int. J. Agric. & Biol. Eng (IJABE) is published in both online and print version by Chinese Academy of Agricultural Engineering.
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