| 离心式油菜精量排种器型孔结构设计与试验 |
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| 引用本文： | 曹秀英,廖庆喜,丛锦玲,廖宜涛.离心式油菜精量排种器型孔结构设计与试验[J].农业机械学报,2014,45(S1):40-46. |
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| 作者姓名： | 曹秀英 廖庆喜 丛锦玲 廖宜涛 |
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| 作者单位： | 华中农业大学;华中农业大学;华中农业大学;石河子大学;华中农业大学 |
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| 基金项目： | 国家自然科学基金资助项目（51275197）、“十二五”国家科技支撑计划资助项目（2013BAD08B02）、国家油菜产业技术体系专项资助项目（CARS-13）、中央高校基本科研业务费资助项目（2014PY033）和武汉市高新技术产业科技创新团队资助项目（2014070504020240） |
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| 摘 要： | 针对传统机械离心式油菜排种器型孔易出现堵塞导致后续断条的问题，进行了离心式油菜精量排种器型孔结构的研究，分析了型孔囊取1、2、3粒油菜种子的临界直径；结合EDEM种子运动轨迹的仿真分析得到了型孔囊取1、2、3粒种子的临界值分别为2.6、3.5、3.8mm；同时试验研究了型孔直径、转速与排种性能关系，进行了型孔堵塞统计试验。结果表明：改进后型孔直径取3.8mm时，其总排量稳定性变异系数不大于14.8%，各行排量一致性变异系数不大于16.4%，型孔无堵塞现象。
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| 关 键 词： | 离心式排种器 油菜 型孔堵塞 型孔结构 |
| 收稿时间： | 2014/6/28 0:00:00 |
Design and Experiment on Metering Hole Structure of Centrifugal Precision Metering Device for Rapeseed |
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| Cao Xiuying,Liao Qingxi,Cong Jinling and Liao Yitao.Design and Experiment on Metering Hole Structure of Centrifugal Precision Metering Device for Rapeseed[J].Transactions of the Chinese Society of Agricultural Machinery,2014,45(S1):40-46. |
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| Authors: | Cao Xiuying Liao Qingxi Cong Jinling and Liao Yitao |
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| Institution: | Huazhong Agricultural University;Huazhong Agricultural University;Huazhong Agricultural University;Shihezi University;Huazhong Agricultural University |
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| Abstract: | Based on problem that metering holes of centrifugal metering device were easily blocked and led to broken rows, the influential factors on blocking of metering hole was analyzed to develop a new structure of metering hole. The critical diameter of metering hole which only took one seed, two seeds or three seeds were determined via the model of relationship among rotation speed, structural parameters of hole and geometric properties of rapeseed. Combined with simulation of trajectory of seeds via discrete element method (DEM) software EDEM, the relevant critical diameter values of metering hole which only took one seed, two seeds or three seeds were 2.6mm, 3.5mm and 3.8mm, respectively. The test research was carried out to achieve the relationship of hole diameter, rotate speed and the performance of metering device. Experiment results showed that when the hole diameter was 3.8mm, variation coefficient of spacing row consistency and stability of full seeding quantity were less than 16.4% and 14.8%, respectively, and there was no blocked hole. |
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| Keywords: | Centrifugal metering device Rapeseed Metering hole blocked Metering hole structure |
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