毕业设计（论文）-小颗粒包衣种子排种器设计.doc

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小颗粒包衣种子排种器设计
摘要:排种器是实现精密播种技术的核心部件,其工作性能的好坏直接影响着播种精度、均匀性、种子的出苗率等。由于气吸振动式排种器具有对种子尺寸要求不高、不伤种子、通用性好、适应性强的优点,且易于提高播种速度,实现自动控制,是一种较为先进的排种装置,已成为当前国内外精密排种器发展的主要方向之一。本文在对国内外现有的精量播种装置进行深入研究的基础上,分析了多种形式的排种装置的优缺点,完成了气吸滚筒式包衣种子精量播种装置的机理。通过建立种子在吸种孔处受力的力学模型,得到了播种装置设计的主要结构参数。
关键字:气吸滚筒式;精密播种;包衣种子
Design of Seeder for Small Packed-grain Seed
Student:
Tutor:
(Oriental science & Technology College of Hunan Agricultural University , Changsha 410128)
Abstract:As a ponent of precision sowing technique, seeder’s working performance directly influenced the sowing accuracy, seed spacing uniformity and emergencerate . Vacuum-vibration seeder has e the major development trend of precision seeder because of its advantages including lower requirement of seeds size, lower harmful
tosseds , higher universality, widely adaptability, easy to improve the working efficiency and realize automatic paper analyzed the merits and ings of diversified plant devices, to plished the theory of mechanism for suction drum. Through build the dynamics model of the seed received force near the suction pore,gained the principal structural parameters to design the seeder device.
Key words: vacuum-vibration; precision seeder; lagging cover seed
1 前言
播种是农业生产中的关键性作业环节,由于播种的季节性,必须要在较短的农时内,根据农艺的要求将种子播到地里。播种质量的好坏将直接影响到作物的出苗、苗全和苗壮。精密播种是为了适应现代农业发展的需要而提出的,精密播种可以