| 摘要: |
| 针对我国现有水稻精量直播排种器对种子适应性差、伤种率高、排种速度低等问题,设计气吸辊式水稻精量直播排种器,并进行种子吸附条件分析,确定影响工作性能的参数;完成了参数的单因素试验和正交试验研究。结果表明:所设计的排种器能够满足水稻芽种的精量穴播和低伤芽率的要求;吸种针孔径与排种器吸种性能影响呈正相关趋势,吸种针孔径选择应大于0.60 mm;影响排种器播种性能的因素主次顺序依次为吸种针孔径、吸种真空度、吸种辊转速,当吸种针孔径为1.55 mm、吸种真空度为0.035 MPa、吸种辊转速为50 r/min时播种效果较好,吸种合格率为98%。 |
| 关键词: 水稻 气吸辊 精量直播排种器 结构设计 吸附条件 |
| DOI：10.11841/j.issn.1007-4333.2012.02.023 |
| 投稿时间：2011-09-07 |
| 基金项目:国家自然基金资助项目(51105363); 中国农业大学青年教师科研项目(15050103) |
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| Design and experimental research of air-suction roller rice precision direct seed-metering device |
|
LIU Cai-ling, SONG Jian-nong, WANG Qing-xu, WANG Ji-cheng
|
| (College of Engeering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| An air-suction roller rice precision direct seed-metering device was designed to solve the existing problem in seed-metering,such as poor adaptability,high rate of seed injury and low seed-metering rate.The conditions of seeds sucking were analyzed and the influencing parameters of performance were obtained.The experimental studies showed that the designed seed-metering device could meet the requirements of rice precision seeding and low rate of bud injury,and a positive correlation relationship was observed between the diameter of the sucking pinhole and suction performance.The diameter of the sucking pinhole should be greater than 0.60 mm.The main factors that affect suction performance were the diameter of the sucking pinhole,the degree of vacuum and roller speed respectively.The rate of qualified sowing is 98% when the diameter of the sucking needle was 1.55 mm,the degree of vacuum was 0.035 MPa and the roller speed was 50 r/min respectively. |
| Key words: rice air-suction roller precision direct seed-metering device mechanical design sucking condition |
