本文選題：免耕移栽 + 育苗技術�。� 參考：《沈陽農業(yè)大學》2017年碩士論文

【摘要】：本文在查閱國內外免耕和移栽技術研究現(xiàn)狀的基礎上,針對遼西地區(qū)春小麥收獲之后移栽玉米過程中生產(chǎn)效率低、勞動強度大、移栽效果不佳、經(jīng)濟效益差等問題,研制玉米免耕移栽機。研究內容如下:(1)確定了玉米免耕移栽機的總體結構設計方案。首先對試驗田狀況考察,并對育苗方式和存在的問題進行分析,這是決定移栽機結構設計的重要組成,根據(jù)所獲取的信息對移栽機的整機的結構、工作原理、投苗原理和動力傳動系統(tǒng)進行設計。(2)利用Solidworks軟件對玉米免耕移栽機的所有零部件進行建模。各個零件建模完成后,進行了整機裝配并對所創(chuàng)建的模型進行裝配檢查,從而確定零件尺寸參數(shù)和裝配位置的合理性。并對關鍵部件波紋破茬圓盤刀和缺口破茬圓盤刀進行有限元分析,結果表明兩種破茬圓盤刀均能能夠滿足強度和剛度要求,設計結構參數(shù)合理。(3)對玉米免耕移栽機在田間進行試驗,分析了兩種不同的破茬圓盤對玉米穴盤苗的移栽深度合格率、株距合格率、立苗合格率的影響。試驗結果表明兩種破茬圓盤均能滿足玉米移栽的農藝要求,波紋圓盤的效果要優(yōu)于缺口圓盤。影響試驗指標的原因是兩種破茬刀對麥茬破壞程度不同,造成地表情況不同,對撓性圓盤、鎮(zhèn)壓輪、覆土器等部件產(chǎn)生影響。試驗結果為免耕移栽機的研制和推廣提供了參考。
[Abstract]:On the basis of consulting the research status of no-tillage and transplanting technology at home and abroad, this paper aims at the problems of low production efficiency, high labor intensity, poor transplanting effect and poor economic benefit in the process of transplanting maize after spring wheat harvest in western Liaoning. A no-tillage transplanter for corn was developed. The research contents are as follows: 1) the overall structure design scheme of corn no-tillage transplanter is determined. First of all, the condition of the experimental field is investigated, and the seedling raising mode and existing problems are analyzed. This is the important composition of the structure design of the transplanter. According to the information obtained, the structure and working principle of the whole transplanter are analyzed. Solidworks software was used to model all parts of corn no-tillage transplanter. After the modeling of each part is completed, the whole machine assembly is carried out and the model created is inspected to determine the rationality of the dimension parameters and assembly position of the parts. The finite element analysis of corrugated stubble disc cutter and notched stubble disc cutter is carried out. The results show that both kinds of cutter can meet the requirements of strength and stiffness. The experiment of corn no-tillage transplanting machine was carried out in the field with reasonable structural parameters. The effects of two kinds of stubble breaking disc on the qualified rate of transplanting depth, the qualified rate of plant spacing and the rate of standing seedling were analyzed. The results showed that the two kinds of stubble disc could meet the agronomic requirements of maize transplanting, and the effect of corrugated disc was better than that of notched disc. The reason of influencing the test index is that the damage degree of the two stubble cutters to wheat stubble is different and the ground condition is different, which has an effect on the flexible disc, the crushing wheel, the soil cladding device and so on. The results provide a reference for the development and popularization of no-tillage transplanter.
【學位授予單位】：沈陽農業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S223.9

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