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摘要
“保护生态环境,实现可持续发展”现在已经成为我们国家在谋求经济快速发展过程中所要遵循的基本方针。面对土地沙漠化面积的迅速扩大和沙尘暴的肆虐一年更盛一年,国家除了实施大规模的防沙治沙工程和全面退耕还草的重大举措之外,在农业方面则一直在积极倡导和推广应用保护性耕作技术。
小麦免耕播种机采用的是“动力圆盘断草、与动力圆盘贴合的夹持式开沟器同位分层播种”在已覆有秸杆的地中能一次性完成行方向秸杆切断、同位分层播种和中后镇压等多项作业的保护性耕作机具。
本文设计了一种新型免耕播种机,采用无动力双圆盘式开沟器,机具结构简单,使用方便,具有碎土作用强,不缠草以及具有播种深度精度高,播种均匀,一次作业能完成6行播种,利于种子的生长,满足在免耕播种后,对麦田行向杂草予于锄除。
关键词:保护性耕作机具;开沟器;免耕播种机
Abstract
“Ecological environment protection and sustainable development” e the basic policy of our country which now in the economy fast developing process must be followed. Facing the land desertification area's rapid expansion and the sand storm, the country not only implement the large-scale against sand to control the sands the project but also take back from agriculture grass's major prehensively, positively has been initiating and promotes the application protection culivation technique in the agricultural aspect.
The wheat exempts plows the seeder to use is “the power disc breaks the grass and with power disc fitting clamp type furrow opener isotopic lamination sowing seeds” after duplicate had in the straw place can disposable form a line the direction straw cut-off, isotopic lamination sowing seeds and the suppression and so on many work protection tillage implements.
I designed a new exempts in the wheat field work. Using the no power double circular disc type furrow opener, the structure is simple and easy to be operated, which broke earth strongly and does not entangle the grass, as well as has the sowing depth precision to be high, sowing seeds is even, The catcher no-tillage planter plete 6 sowing seeds, the seed can grows better.
Keywords: Protection tillage machine; Furrow opener; Exempts plows the seeder
目录
1 绪论 1
引言 1
背景及原理介绍 1
论文的主要工作和意义 2
总体方案的确定 3
2 动力性能的设计与校核 4
丰收180型拖拉机的配套适应性计算 4
拖拉机液压提升能力计算 6
机组操向稳定性计算 7
坡道极限倾翻角计算 8
3 主要部件的设计 9
轴的设计 9
传动轴的设计 9
轴的计算与校核 10
键的选择与校核 16
链轮的设计 18
链轮的计算 18