首页|制种玉米与剥皮机构互作过程仿真与试验

制种玉米与剥皮机构互作过程仿真与试验

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
针对制种玉米利用大田玉米剥皮机作业籽粒损失大等现象,本文对剥皮过程中制种玉米果穗与剥皮机构间的碰撞和摩擦进行理论分析,得到了影响剥皮效果的主要因素,建立了玉米果穗-剥皮机构系统的离散元与多体动力学柔性模型,利用DEM-MBD联合仿真技术对制种玉米与剥皮机构互作过程进行模拟研究,采用Box-Behnken试验设计原理,以压送器与剥皮辊间距、剥皮辊转速和剥皮辊间隙为试验因素,以果穗平均前进速度和最大受力为试验指标,进行三因素三水平试验,最后进行台架试验和田间试验.理论分析结果表明:玉米果穗沿剥皮辊轴线方向的前进速度和剥皮过程中所受的作用力能够分别表征苞叶剥净率与籽粒损失率;试验结果表明,制种玉米剥皮机构最佳工作参数组合:压送器与剥皮辊间距为32 mm、剥皮辊转速为430 r/min、剥皮辊间隙为-0.3 mm,此时玉米果穗苞叶剥净率为93.33％,籽粒脱落率为1.802％,籽粒破损率为1.203％,机具田间试验与台架试验结果误差小于3％.试验所用剥皮辊满足制种玉米剥皮的性能要求,所用方法能够为制种玉米剥皮机构的改进提供参考.
Simulation and Experiment on Interaction Process between Seed Corn and Corn Husking Mechanism
In view of the phenomenon of large grain loss in corn production using field corn husker,the collision and friction between corn ear and husker mechanism in the process of husking was theoretically analyzed,the main factors affecting the husker effect was obtained,and the discrete element and multi-body dynamic flexible model of corn ear-husker mechanism system was established.DEM-MBD co-simulation technology was used to simulate the interaction process between seed making corn and husking mechanism.Box-Behnken test design principle was adopted,with the distance between the press-feed device and the husking roller,the speed of the husking roller and the gap between the husking roller as test factors,and the average forward speed and maximum force of the fruit ear as test indexes,three-factor and three-level tests were carried out.Finally,bench test and field test were carried out.The results of theoretical analysis showed that the advance speed of corn ears along the peeling roller line and the applied force during the peeling process could represent the stripping rate of bracts and grain loss rate respectively.The test results showed that the optimum working parameter combination of corn husking mechanism was as follows:the distance between the press feeder and the peeling roller was 32 mm,the rotating speed of the peeling roller was 430 r/min,and the gap between the peeling roller was-0.3 mm.In this case,the husk stripping rate was 93.33％,the kernel shedding rate was 1.802％,and the kernel breakage rate was 1.203％.The error between the field test and bench test results was less than 3％.The roller used in the experiment can meet the performance requirements of corn husking,and the method used can provide some reference for the improvement of corn husking mechanism.

seed cornhusking mechanismDEM-MBD co-simulationflexible modelinteraction process

陈俊志、史瑞杰、戴飞、赵武云、赵一鸣、辛尚龙

展开 >

甘肃农业大学机电工程学院,兰州 730070

制种玉米 剥皮机构 DEM-MBD联合仿真 柔性模型 互作过程

甘肃省农业农村厅农机装备补短板项目甘肃省农业农村厅农机装备补短板项目甘肃省科技重大专项甘肃省科技重大专项中央引导地方科技发展资金项目财政部和农业农村部:国家现代农业产业技术体系项目

njyf2022-02njyf2023-0221ZD10NF003-4-0123ZDNA00823ZYQF305-1CARS-14-1-28

2024

10.6041/j.issn.1000-1298.2024.04.009

农业机械学报
中国农业机械学会 中国农业机械化科学研究院

农业机械学报

CSTPCD北大核心
影响因子：1.904
ISSN：1000-1298
年,卷(期)：2024.55(4)
  • 28