颜丙新,张东兴,杨丽,崔涛,钟翔君,李玉环.重力辅助充种盘室同步气吸式排种器性能分析[J].农业机械学报,2018,49(s1):117-124.
YAN Bingxin,ZHANG Dongxing,YANG Li,CUI Tao,ZHONG Xiangjun,LI Yuhuan.Performance Analysis of Gravity Assist Filling Precision Seed-metering Device with Synchronously Rotating Seed Plate and Vacuum Chamber[J].Transactions of the Chinese Society for Agricultural Machinery,2018,49(s1):117-124.
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重力辅助充种盘室同步气吸式排种器性能分析   [下载全文]
Performance Analysis of Gravity Assist Filling Precision Seed-metering Device with Synchronously Rotating Seed Plate and Vacuum Chamber   [Download Pdf][in English]
投稿时间:2018-07-15  
DOI:10.6041/j.issn.1000-1298.2018.S0.016
中文关键词:  玉米  气吸式排种器  盘室同步  重力辅助  充种性能
基金项目:国家重点研发计划项目(2017YFD0700703)、现代农业产业技术体系建设项目(CARS-02)和农业部土壤-机器-植物系统技术重点实验室项目
作者单位
颜丙新 中国农业大学 
张东兴 中国农业大学 
杨丽 中国农业大学 
崔涛 中国农业大学 
钟翔君 中国农业大学 
李玉环 中国农业大学 
中文摘要:为探究重力辅助对盘室同步气吸式精量排种器充种性能的影响,以盘室同步气吸式精量排种器为载体,对其充种过程进行了受力分析,建立了重力辅助充种受力数学模型,结果表明:型孔充填过程中,待充种子重力在排种盘径向的分量与气流曳力方向一致;已充种子脱离种群过程中,种子重力沿径向分量与压力梯度力方向一致,种子重力对充种有辅助作用。运用EDEM(Engineering discrete element method)软件仿真分析了300、600、900、1200粒种群数量条件下,待充种子对排种盘平均法向力随低、中、高3种不同充种区域变化的影响,仿真结果表明:种群数量300粒时,各区域平均法向力随区域位置的变化不明显,种群数量为600、900、1200粒时,平均法向力随区域位置的变化规律一致,此时种群数量对充种效果影响可忽略。对仿真结果进行试验验证的结果表明,盘室同步气吸式精量排种器台架试验3个区域漏充率由大到小为:低位、中位、高位。通过盘室同步气吸式精量排种器重力辅助充种和无重力辅助充种对比试验表明:重力辅助充种下,排种器作业风压3~5.5kPa时,合格指数均高于94%;无重力辅助充种情况下,排种器作业风压6kPa才开始满足国标需要,重力辅助充种显著降低了排种器作业风压需求,提高了作业质量。
YAN Bingxin  ZHANG Dongxing  YANG Li  CUI Tao  ZHONG Xiangjun  LI Yuhuan
China Agricultural University,China Agricultural University,China Agricultural University,China Agricultural University,China Agricultural University and China Agricultural University
Key Words:maize  air-suction metering device  synchronous seed plate and chamber  gravity-assisted  filling effect
Abstract:To explore the influence of gravity assist on the filling performance of the vacuum precision seed-metering device with synchronously rotating seed plate and vacuum chamber, taking the vacuum precision seed-metering device as the carrier, stress analysis of filling process was carried out, and mathematical model of gravity-assisted filling was shown. The results showed that gravity radial component along the seed tray was consistent with direction of dragging force, during the filling process;gravity radial component along the seed tray was consistent with direction of pressure gradient force, during filled seeds detachment process from population. Effects of different numbers of seeds to be filled seed on average normal force of seed tray under low, medium and high states were analyzed by simulation using engineering discrete element method (EDEM) software. Simulation results showed that average normal force was not changed significantly within low, medium and high states under population of 300;the average normal force was varied within low, medium and high states under population of 600, 900 and 1200, the influence of the population on the filling effect can be neglected. Laboratory tests results showed that missing index of seed-metering device from big to small was satisfied as low condition, medium condition and high condition. Comparison test between gravity-assisted filling and non-gravity-assisted filling of the seed-metering device showed that qualified index was above 94% under operating pressure of 3~5.5kPa with gravity-assisted filling, which met national standard under operating pressure above 6kPa with no gravity-assisted. Gravity-assisted filling significantly reduced operating pressure demand and improved the quality of work.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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