freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內容

小型蔬菜移栽機的研究與設計論文(存儲版)

2025-07-28 18:39上一頁面

下一頁面
  

【正文】 構、彈簧、凸輪、導軌以及凸輪軸等組成。工作過程中,地輪不僅要承載整機及投苗手的重,而且還要作為驅動輪驅動栽植輪工作,因而輪上計若干凸起,以減少滑移,降低地輪滑移率。宋建農。陳永成。2.3地輪地輪的結構如圖4所示,主要由調節(jié)手柄、連接架、輪架及輪組成。min(一般人工喂苗頻率不超過60株/min);單行作業(yè);株距為250~400mm,可調;栽植深度為55~80mm,可調;倒苗率(缽苗與地面夾角小于等于45。1.2 工作原理工作時,懸杯式蔬菜移栽機通過三點懸掛與拖拉機相連,由拖拉機牽引完成移栽作業(yè)。因而,實現移栽作業(yè)機械化已成為我國蔬菜種植業(yè)迫切需要解決的問題。 主要參考文獻【1】萬霖,汪春,車剛,小型蔬菜移栽機的改進和設計實驗《農業(yè)工程學報》2011 30 (6)【2】 李其昀,汪遵元 雙輸送代式栽植器的試驗研究 《農業(yè)工程學報》1997 13(3) 124-127頁【3】 《我國棉花營養(yǎng)缽移栽機械現狀與發(fā)展趨勢》,夏俊芳本論文是在萬霖和車剛老師的直接指導下完成的,在課題研究和論文撰寫過程中,車老師言傳身教,自始至終都給予了我悉心的指導和深深的啟迪,設計和論文的每個細節(jié)都離不開您的細心的指導!感謝萬霖老師和車剛老師的指導!謝謝您們,我的老師們!感謝在一起度過快樂時光的144室的寢室室友們,祝你們學業(yè)有成。地輪軸的校核 受力分析:機架通過地輪、開溝器、覆土器和鎮(zhèn)壓輪和地面接觸,其中地輪為機架重力的主要承擔者,現假設地輪承受全部的重力,以便對地輪軸進行校核。鏈選取08A,內鏈節(jié)b1取8mm。由于輸送機構和栽植機構是本次設計的核心,所以主要闡述這兩個機構。這就栽植機械的零速原理 。 覆土器覆土器是蔬菜移栽機械的主要部件之一。(取R為270mm) 鎮(zhèn)壓輪鎮(zhèn)壓輪也是移栽機的主要部件之一。如土角過小,會使芯鏵尖而長,強度減弱。為此,將移栽機的地輪和開溝器設計的較近。當到達圖示位置時,吊杯在強制力的作用下打開,將缽苗放入由開溝器(9)開出的溝內,隨后在覆土器(11)的作用下缽苗被固定,然后在鎮(zhèn)壓輪(12)的作用下,缽苗被牢牢壓實,完成栽植工作。移栽質量不穩(wěn)定,尤其是沒有扶苗裝置的移栽機,秧苗的直立度、株距、深度等都不能完全達到農業(yè)技術要求。另一方面,喂入器是由多個水平轉動的喂入桶或者是較長的輸送帶構成,人工喂苗時,不必像上述移栽機一樣逐個喂入。如新疆農科院農機所的2ZT2型紙筒甜菜移栽機。鉗夾式移栽機典型代表是1979年山西省運城地區(qū)農機所研制的2ZMB2型缽苗移栽機。全自動的移栽機因結構復雜,成本高,而僅處在研究起步階段。通過提高種植技術的機械化水平,進一步完善與移栽配套的育苗設施及相應的配套技術,使育苗和移栽有機的結合,就可以降低種植成本,達到增加產量,提高經濟效益的目的【181。5).對不同種類栽植機械與作物缽苗相適應性的研究工作進行得不充分,對栽植機械工作原理以及機械與作物生長要求相適應性研究不足。吉林工業(yè)大學孫廷琮等應用美國B.K.Huan發(fā)明的空氣整根育苗技術研究開發(fā)了空氣整根營養(yǎng)缽育苗移栽系統,在此基礎上研制了空氣整根缽苗全自動移栽機。該移栽機的優(yōu)點:①.結構簡單;②.將開穴與移栽合為一體,無須開溝裝置;③.動力消耗小;④.缽苗損傷率低。當吊杯轉到上面時,由人工將秧苗喂入吊杯中,當吊杯轉動到下面預定位置時,吊杯上的滾輪4與導軌接觸,固定滑道使栽植器下部打開,秧苗落入苗溝內,隨即被覆土定植,吊杯在離開固定導軌后自動關閉,等待下一次喂苗。開溝器6移栽機械的研究始于20世紀50年代末60年代初,最早出現的是棉花營養(yǎng)缽育苗移栽機和甘薯秧苗栽植機的試驗研究。Magli)生產的沃夫(wolf)栽植機和艾德沃思(Edwards)農機廠生產的坡杜(PERDU)栽植機。這3種機型的典型代表依次為:荷蘭米啟根公司(Mehigan)生產的Model4000型栽植機、芬蘭勞尼思公司(Lannen)生產的RT2型栽相機和意大利切克基馬格利公司(Chedclli&Magli)生產的奧特瑪(OTMA)栽植機和荷蘭米啟根公司叫c11ig鋤)生產的MT栽植機,總體來說,該移栽機應用較少,有被淘汰的趨勢。移栽是蔬菜生產過程中的重要環(huán)節(jié)之一,栽具有對氣候的補償作用和使作物生育提早的綜合效益,可以充分利用光熱資源,其經濟效益和社會效益均非常可觀。我國是世界最大的蔬菜生產國,蔬菜產量占世界總產量的60%左右。通過提高種植技術的機械化水平,進一步完善與移栽配套的育苗設施及相應的配套技術,使育苗和移栽有機的結合,就可以降低種植成本,達到增加產量,提高經濟效益的目的。但目前國內缺乏適合這些特殊要求的栽植機,)農機部門適時引導,國家政策宏觀調控。我國沒有制定統一的技術標準,各種移栽機難以標準化,不利于其發(fā)展。  3.2 解決途徑分析  設計適合我國蔬菜移栽農藝要求,開提高移栽機自動化程度和機具性能。我國栽植機械的研究開發(fā)方面雖然已有四十年的歷史,并隨著育苗技術的發(fā)展,以及勞動力成本的上升,在移栽機的研制方面取得了較大的進展,并逐步轉向自動移栽機方面的研究,但目前仍然處于起步階段,研制的移栽機都沒有得到大面積推廣應用。關鍵詞:缽苗移栽機;移栽機構;計算機輔助設計;數字化設計關鍵詞:蔬菜 移栽 機械AbstractTransplanting is a key process of vegetables production, have a prehensive benefits of climate pensation and early crops growth.One Can make full use of its light and heat resources,and get an impressive economic benefit and social benefit as well.However,the previous Transplanting process possess disadvantage of labor intensity ,low working efficiency and difficult to realize its large scale production ,which restricts its production capacity, benefits and limits its development.Space omestic transplanters are mainly imitating the foreign transplanter,and have not maken any significant improvement and breakthrough for foreign transplanter.Furthermore,the foreign transplanter own a plex structure and a high price,whichmake it difficult to popularize in China.Therefore,to design a new type of vegetables transplanter has bee an urgent demand of China’ S vegetable planting development.Based on the summary of the advantages and disadvantages of the domestic and foreign vegetables transplanter and absorbed the research achievements of laboratory ,the paper design a new type of vegetables transplanter on the basis of the ported—seedling transplanting mechanismthe lever ejection mechanism,which is more simple,reliably and efficently and economic,as well as easily realizing open ditch ,fertilization ,transplanting,furrow cover et e.This device has publicly vegetables transplanting invention patent(2008 1006301 3.8)and utility model patent(200820 121 1 05.2),And has publicly invention patent of vegetables transplanting device ofplaten(200910099278.8).The paper ’S main research are showed as follows:1.Make a research of the abroad vegetables transplanter and principle of research results of laboratory.Firstly ,determine the basic parameters of the transplanter based on the mechanism analysis of the ported—seedling transplanting mechanism and the requirement of design.Then definite the important structure parameters quickly and accurately, such as the transmission ratio,phase separation ofejector rob and time of ejection by establishing a mathematical model program.2.Establish the mathematical model of the core ponents一一the lever edit action mechanism according to abovementioned parameters of vegetables transplanter ,carry on the mechanism of kinematics and dynamic analysis and on base of MATLAB software to select the best parameter of the six groups of the lever ejection mechanism and related institutions.Model the transplanting mechanism based on its parameters by UG software.Then carry on the simulation analysis based on ADAMS software and determine whether the result is correct.3.Design the key ponents of vegetables transplanter based on CAD technology and UG software,including opening ditch device,furrow coveting device,platen device,fertilization device and transmission system.In the transmission system,in order to determine be width between centers quickly and solve pin shaft of virtual positioning and chain of virtual assembly problem,Cal Ty on parametric studies of chain based On UG software.4.Add Vb.net program custom to menu item of transplanting mechanism in CAD software SO as to achieve series design of the vegetables transplanting mechanism quickly and adapt to different vegetables requirements.Users Can input parameters onthe custom menu according to different agronomic requirements of vegetables,obtain the needed mechanism model by the digital deformation design ,And carry on the simulation analysis of the deformation model based on ADAMS software,determine whether the deformation model is correct.Acplished the assembly list update through the secondary development of UG software as well as improving the design efficiency ,reducing duplication of labor.5.Manufa
點擊復制文檔內容
公司管理相關推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號-1