| 正反转动力式玉米切茬防堵装置设计与试验 |
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| 引用本文： | 朱惠斌,钱诚,白丽珍,赵浩然,马世骜,张旭,李慧.正反转动力式玉米切茬防堵装置设计与试验[J].农业工程学报,2022,38(1):1-11. |
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| 作者姓名： | 朱惠斌 钱诚 白丽珍 赵浩然 马世骜 张旭 李慧 |
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| 作者单位： | 1. 昆明理工大学现代农业工程学院，昆明 650500;;2. 山东省农业机械科学研究院，济南 250010; |
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| 基金项目： | 国家自然科学基金项目（51865022）；云南省科技厅面上项目（2015FB125） |
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| 摘 要： | 针对西南地区免耕播种作业存在秸秆覆盖量大、秸秆整杆覆盖和地块较小的问题,该研究基于有支撑切割原理设计了一种正反转动力式切茬防堵装置.通过参数分析设计了仿生切茬圆盘刀,对防堵装置进行力学和运动学分析揭示其防堵机理.基于离散元法建立防堵装置的数值仿真模型,选取机具前进速度、刀盘间距、正转转速和反转转速为试验因素,以粘结键断...
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| 关 键 词： | 设计 农业机械 离散元法 免耕播种机 防堵装置 粘结键断裂数量 |
| 收稿时间： | 2021/11/12 0:00:00 |
| 修稿时间： | 2021/12/20 0:00:00 |
Design and experiments of active anti-blocking device with forward-reverse rotation |
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| Zhu Huibin,Qian Cheng,Bai Lizhen,Zhao Haoran,Ma Shiao,Zhang Xu,Li Hui.Design and experiments of active anti-blocking device with forward-reverse rotation[J].Transactions of the Chinese Society of Agricultural Engineering,2022,38(1):1-11. |
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| Authors: | Zhu Huibin Qian Cheng Bai Lizhen Zhao Haoran Ma Shiao Zhang Xu Li Hui |
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| Institution: | 1. Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China;; 2. Shandong Academy of Agricultural Machinery Science, Ji''nan 250010, China; |
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| Abstract: | Conservation tillage has been a widely defined practice to maintain crop residues on at least 30% of the soil surface after tillage activities, in order to increase soil organic carbon and microbial biomass for less soil erosion in sustainable agriculture. However, a furrow opener of sowing can be twined and clogged by surface crop residues, leading to seed exposure and break ridge in fields. Furthermore, the current no-tillage seeder equipped with an anti-blocking device cannot fully meet the large crop residues with the whole straw coverage on the small plot in Southwest China. In this study, an active anti-blocking device with down-cut and up-cut was designed for the maize no-tillage planter using the support cutting principle. The bionic enlightenment of the anti-blocking device design was obtained from the movement mode and morphological structure of Batocera Horsfieldi. The profile curve of Batocera Horsfieldi mouthpart was extracted as the cutter edge of the right and left disc coulter using image processing. The parametric equation of the left and right disc coulter teeth was established using the fitting curves. A solution analysis was used to determine the functional relationship of tooth number and tooth height of the left and right disc coulter, according to the geometrical relation. A mechanical model of cutting straw was established to reveal the anti-blocking mechanism. A kinematic analysis was implemented to obtain the motion trajectory of the blade tip in the left and right disc coulter. The discrete element method (DEM) was selected to simulate the operation process of the anti-blocking device. A Hertz-Mindlin with a bonding contact model was also established for the crushable corn straw under EDEM software. Furthermore, the single-factor experiment demonstrated that the down-cut disc coulter was in the right disc type, and the number of teeth was 9. A quadratic regression rotatable orthogonal experiment was carried out to obtain the optimal parameter combination. Specifically, the forward speed, spacing, down-cut speed, and up-cut speed were taken as experimental factors, whereas, the number of broken bonds and power were as the experimental indexes. The Design-Expert was selected to establish the regression model for the number of broken bonds and power. A variance analysis showed that the forward speed presented an effect (0.01
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| Keywords: | design agricultural machinery discrete element method no-tillage seeder anti-blocking device number of broken bonds |
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