发布时间 : 星期一 文章内充种气吸玉米免耕播种机的设计 - 镇压部分的设计 - 图文更新完毕开始阅读4916b4dd71fe910ef12df8db
本科毕业设计（论文）通过答辩
本科毕业设计
题 目：内充种气吸玉米免耕播种机的设计—镇压部分的设计
本科毕业设计（论文）通过答辩
摘 要
针对一年两熟地区夏玉米整秆覆盖下免耕直播冬玉米易产生堵塞这一难题，提出了对行播种思路，研制了玉米对行免耕施肥播种机。根据玉米免耕播种的特定农艺要求，阐述了气吸式玉米免耕播种机的设计原则和思想，介绍了其结构特点和技术参数，并对切茬开沟器部件和镇压部分提出了合理的工作参数及设计。该机能在留茬地上一次完成破茬开沟、施肥、播种以及覆土镇压等作业工序。作业时，土壤扰动少，并可满足高速精量播种质量要求。；对播种机构进行了改进，设计了单圆盘和双圆盘两种播种镇压单体，采用单体仿行，田间防堵性能试验表明双圆盘播种单体结构简单，防堵性能好，播深一致性好，有效解决了原样机相邻两组种管之间的壅堵问题。
样机试制成功后进行了整机播种性能试验，试验表明改进后的机具在玉米整秆覆盖下对行免耕播种玉米防堵效果显著，种、肥播深变异系数较改进前明显变小，整机结构设计合理，为一年两熟地区冬玉米免耕播种提供了技术支持。
关键词： 保护性耕作； 一年两熟；内气吸玉米免耕播种机；防堵；设计
本科毕业设计（论文）通过答辩
Abstract
According to the two crops a year in summer corn whole stalk mulching under no-tillage direct seeding of winter maize the problem of clogging, proposed to the row seeding ideas, development of corn on no-tillage fertilizing and seeding machine. According to the requirements of specific agronomic no-till maize, expounds the design principles and ideas of the suction maize no-tillage planter, the structure characteristics and technical parameters are introduced, and put forward the reasonable working parameter and design about ground-working opener and repression of. The function completed crop open ditch, fertilization, sowing and soil-covering press once in the stubble on the work process. During the operation, less soil disturbance, and can meet the requirements of high-speed precision sowing quality. The seeding mechanism; improved design, single disc and double-disc two planting monomer, the monomer to follow, the anti-blocking performance test shows that the disc seeding single body has the advantages of simple structure, good anti-blocking performance, sowing depth consistency is good, effective solution to the original machine two sets of adjacent pipe. Blocking problem.
After the success of the prototype of the seeding performance test, test show that the improved machine in the whole corn stalk mulching under no-tillage corn of anti-blocking effect, a fertilizer seeding depth, coefficient of variation than before improvement becomes small, the structure design is reasonable, and provides technical support for the year two land area of winter maize no-tillage planter.
Keywords: conservation tillage; two crops a year; the gas suction maize no-tillage planter anti-blockage; design;
本科毕业设计（论文）通过答辩
目 录
第一章 绪论???????????????????????1
1.1 国内外耕播种机的研究概况????????????????1 1.2 精密播种的发展趋势???????????????????4 1.3 课题研究的意义与内容??????????????????5 1.4 课题研究内容与技术路线?????????????????6
第二章 内气吸玉米免耕播种机单体的设计??????????8
2.1 开沟器性能分析及设计????????????????????8 2.2 播种单体整体结构分析????????????????????12 2.3 镇压机构的总体设计?????????????????????13
参考文献????????????????????????21 致 谢????????????????????????23