赖庆辉,高筱钧,张智泓.三七气吸滚筒式排种器充种性能模拟与试验[J].农业机械学报,2016,47(5):27-37.
Lai Qinghui,Gao Xiaojun,Zhang Zhihong.Simulation and Experiment of Seed-filling Performance of Pneumatic Cylinder Seed-metering Device for Panax notoginseng[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(5):27-37.
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三七气吸滚筒式排种器充种性能模拟与试验   [下载全文]
Simulation and Experiment of Seed-filling Performance of Pneumatic Cylinder Seed-metering Device for Panax notoginseng   [Download Pdf][in English]
投稿时间:2015-12-16  
DOI:10.6041/j.issn.1000-1298.2016.05.005
中文关键词:  三七  气吸滚筒式排种器  充种性能  数值模拟
基金项目:国家自然科学基金项目(51305187)、云南省重点新产品开发计划项目(2014BC007)、云南省科技计划青年项目(2015FD011)和昆明理工大学自然科学研究基金项目(KKSY201323067、KKSY201323025、14118940)
作者单位
赖庆辉 昆明理工大学 
高筱钧 昆明理工大学 
张智泓 昆明理工大学 
中文摘要:Panax notoginseng is one of rare medicinal herbs in China, and it is mainly grown in Yunnan Province. Market demand of Panax notoginseng is very large, and hence, until December 2014, the planting area of Panax notoginseng has reached 40000hm2. However, there is no precision seeding device suitable for Panax notoginseng. Seed filling performance is the key factor that influences the properties of metering device. In order to improve the seed filling performance of pneumatic cylinder seed metering device, Yunnan Wenshan notoginseng seeds were adopted as sowing objects, the method of coupling DEM-CFD was used as research technique, meanwhile, variance yields of average normal stress and height of supplying seeds were considered as the optimizing targets. Through single factor experiment, the blowing wind pressure, vibration frequency and vibration angle were numerically simulated. It can be found that the experimental phenomenon and effect were in consistent with the simulation ones. Results showed that the blowing wind pressure can break the original steady state, thus reduce seeds transient normal stress which lower seeds internal friction; vibration frequency increases variance yields of average normal stress of seeds, hence disturbance of seeds was enhanced; and adequate vertical oscillation can effectively improve height of supplying seeds. Reducing internal friction, enhancing disturbance, improving height of supplying seeds can effectively improve the seed filling performance. To find the best parameter combination, this paper used three factors and five levels orthogonal experimental method to test the metering performance, afterwards, the results of the test were optimized and verified. Results showed that at the vibration frequency of 85Hz, blowing wind pressure of 3kPa, vertical oscillation of 45°, experimental index is the best. Test indicators, including eligible index, missing index, multiple index can reach up to 93.02, 1.42 and 5.56, respectively.
Lai Qinghui  Gao Xiaojun  Zhang Zhihong
Kunming University of Science and Technology,Kunming University of Science and Technology and Kunming University of Science and Technology
Key Words:Panax notoginseng  pneumatic cylinder seed metering device  seed filling performance  numerical simulation
Abstract:

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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