立式浅盆型复合种盘大豆排种器结构设计与参数优化

摘要/Abstract

摘要： 为满足机械式精密排种器高速作业的要求，以增加充填力的方式对立式圆盘排种器进行改进，设计了一种利用重力与离心力以及种子间相互作用力作为复合力进行充种的双腔立式浅盆型复合种盘机械式精密排种器，并对排种盘的特征参数进行了优化。利用离散元仿真分析软件EDEM对立式浅盆型种盘进行了以排种盘直径、折边倾角、作业速度为影响因素，充填率为性能指标的三因素五水平二次正交旋转组合仿真设计，并运用Design-expert 8.0软件对数据进行了处理，获得了排种盘最优的结构参数组合，同时利用物理样机试验进行了验证。研究结果表明：立式浅盆型种盘的最佳结构参数组合为排种盘直径234mm、折边倾角68°，在8 ~12km/h高速作业时，合格率均能达到90%以上。研究结果为产品定型提供了定量的依据。

关键词: 机械式精密排种器, 浅盆型复合种盘, 结构设计, 参数优化

Abstract: To meet the working requirements of mechanical precision seed-metering device at high speed, a vertical shallow basin-type composite seed-plate seed-metering device with double cavity was designed, the seed-metering device might utilize gravity, centrifugal force and interaction force among the seeds to increase the filling force, improve the filling performance of seed-metering device at high speed. And in order to obtain the structure parameters of seed-metering devices to further improve the quality of precision seeding, the software of EDEM was utilized to make the three factors and five levels of all factors rotational quadratic orthogonal experiments which took the diameter of seed-plate, folding angle, working speed as the influence factors, and filling rate as the performance index， the experimental scheme was designed. And Design-expert 8.0 software was used to deal with the simulation data, the optimal structural parameters of the seed plate were obtained, the physical prototype test was made to verify the values of simulation. The experimental results show that when the diameter of seed plate is as 234mm, folding angle is as 68°, qualified rate may be beyond 90% at the high-speed area(working speed in the range of 8km/h to 12km/h), the optimized parameters may meet the demands of high speed operations, which will provide the basis and references for the product approval.

Key words: mechanical precision seed-metering device, shallow-basin type composite seed-plate, structure design, parameter optimization

中图分类号:

S223.23

刘宏新, 徐晓萌, 付露露, 王晨. 立式浅盆型复合种盘大豆排种器结构设计与参数优化[J]. 中国机械工程.

Liu Hongxin, Xu Xiaomeng, Fu Lulu, Wang Chen. Design and Parameter Optimization on Vertical Shallow-basin Type Composites Seed-plate Soybean Seed-metering Devices[J]. China Mechanical Engineering.

参考文献

[1]丛锦玲，廖庆喜，曹秀英，等. 油菜小麦兼用排种盘的排种器充种性能[J]. 农业工程学报，2014，30(8)：30-39.

Cong Jinling, Liao Qingxi, Cao Xiuying, et al. Seed Filling Performance of Dual-purpose Seed Plate in Metering Device for Both Rapeseed & Wheat Seed[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of The CSAE), 2014, 30(8):30-39.

[2]胡建平，毛罕平. 精密播种技术的研究与创新[J].农机化研究，2003(4):52-53,59.

Hu Jianping, Mao Hanping. A Study and Innovation on Precision Seeding Technology[J]. Journal of Agricultural Mechanization Research, 2003(4):52-53,59.

[3]林叙彬. 精密排种器的研究进展[J].现代农业装备，2012（7）:48-49. Lin Xubin. Research Progress of Precision Metering Device [J]. Moderm Agricultural Equipments, 2012(7):48-49.

[4]Deng Xiaoyan, Li Xu, Shu Caixia, et al. Mathematical Model and Optimization of Structure and Operating Parameters of Pneumatic Precision Metering Device for Rapeseed[J]. Journal of Food, Agriculture & Environment， 2010，8(3/4)（Part 1):318-322.

[5]Raji A O, Favier J F. Model for the Deformation in Agricultural and Food Particulate Materials Under Bulk Compressive Loading Using Discrete Element Method. Ⅰ. Theory, Model Development and Validation[J]. Journal of Food Engineering，2004，64(3):359-371.

[6]Zhang X, Vu-Quoc L. A Method to Extract the Mechanical Properties of Particles in Collision Based on a Newelasto-plastic Normal Force-displacement Model [J]. Mechanics of Materials, 2002, 34: 779-794.

[7]LoCurto G J, Zhang X, Zakirov V， et al.Soybean Impacts: Experiments and Dynamic Simulations[J].Transactions of the ASAE, 1997, 40(3): 789-794.

[8]廖庆喜，张朋玲，廖宜涛，等. 基于EDEM的离心式排种器排种性能数值模拟[J]. 农业机械学报，2014,45（2）：109-114.

Liao Qingxi, Zhang Pengling, Liao Yitao, et al. Numerical Simulation on Seeding Performance of Centrifugal Rape-seed Metering Device Based on EDEM[J].

Transactions of the Chinese Society for Agricultural Machinery, 2014, 45(2): 109-114.

[9]于建群，王刚，心男，等.形孔轮式排种器工作过程与性能仿真[J].农业机械学报, 2011, 42(12): 83-87.

Yu Jianqun, Wang Gang, Xin Nan,et al. Simulation Analysis of Working Process and Performance of Cell Wheel Metering Device [J]. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(12): 83-87.

[10]李政权，于建群，张尉林，等.内充式排种器工作过程和性能的离散元法仿真分析[J].农业工程学报，2011,27(11): 32-36.

Li Zhengquan, Yu Jianqun, Zhang Weilin, et al. Simulation Analysis of Working Process and Performance of Inside-filling Seed Metering Device by Discrete Element Method[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE), 2011, 27(11): 32-36.

[11]于建群，申燕芳，牛序堂，等. 组合内窝孔精密排种器清种过程的离散元法仿真分析[J].农业工程学报，2008，24(5) :105-108.

Yu Jianqun, Shen Yanfang, Niu Xutang, et al.DEM Simulation and Analysis of the Clearing Process in Precision Metering Device with Combination inner-cell[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE), 2008,24(5) :105-108.

[12]刘宏新，徐晓萌，郭丽峰，等. 具有复合充填力的立式浅盆型种盘排种器充种机理[J]. 农业工程学报，2014，30(21)：9-16.

Liu Hongxin, Xu Xiaomeng, Guo Lifeng, et al. Research on Seed-filling Mechanism of Vertical Shallow Basin Type Seed-metering Device With Composite Filling Force[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE), 2014, 30(21): 9-16.

[13]刘宏新. 大豆密植平播机关键部件研究及整机设计[M]. 北京：中国农业出版社，2007.

[14]胡国明. 颗粒系统的离散元素法分析仿真[M]. 武汉：武汉理工大学出版社，2010.

[15]王国强，郝万军，王继新. 离散单元法及其在EDEM上的实践[M]. 西安：西北工业大学出版社，2010.

[16]Resort G S, Nevada C R. Material and Interaction Properties of Selected Grains and Oil Seeds for Modeling Discrete Particles [J]. ASABE Annual International Meeting, 2009(7): 3-16.

[17]王福林，尚家杰，刘宏新，等. EDEM颗粒体仿真技术在排种机构研究上的应用[J]. 东北农业大学学报，2013，44(2)：110-114.

Wang Fulin, Shang Jiajie, Liu Hongxin, et al. Application of EDEM Particles Simulation Technology on Seed-metering Device Research [J]. Journal of Northeast Agricultural University, 2013, 44(2): 110-114.

[18]辛涛. 回归分析与实验设计[M]. 北京：北京师范大学出版社，2010.

[19]GB-6973-86单粒（精密）播种机试验方法[S].北京：中国标准出版社，1986.

[20]JB/T 10293-2001中耕作物精密播种机产品质量分等[S].北京：中国标准出版社，1999.