【正文】 致了糧食增產(chǎn)與施用化肥成本的報酬遞減現(xiàn)象，造成農(nóng)民施肥積極性的下降。數(shù)據(jù)顯示，近10年中國農(nóng)田面積減少10億畝，隨著退耕還林、退田還草等工程的實施，農(nóng)田面積還會減少，勢必影響化肥的需求。s chemical fertilizer industry, in particular, BB fertilizer industry should unite together to play the whole advantage of their big, fat BB from abroad against a strong impact.So, BB fertilizer production facilities in China are bound to have good prospects for the development, the design issue is (9BB Ⅱ type) BB fertilizer production equipment design and drive system design. The main subject of the overall program, including the identification and determination of transmission and calculation of the size. The pletion of this subject, can we learn how to learn in class by the application of theoretical knowledge to the society a better practice. In this paper, there is bound to be a lot of fault and error please ment criticism teachers.Key words: Opportunity Challenge Development目錄1 緒 論 5 研究的目的和意義 5 我國與世界其他國家BB肥生產(chǎn)設(shè)備發(fā)展現(xiàn)狀 6 BB肥生產(chǎn)設(shè)備的特點 7 BB肥及其生產(chǎn)設(shè)備在我國的發(fā)展展望 82 總體方案確定 10 總體設(shè)計要求 10 總體設(shè)計 10 設(shè)計思想 10 主要結(jié)構(gòu) 10 工作原理 10 工藝流程 10 技術(shù)要求 11 總體尺寸綜合 11 總體圖 113 提升系統(tǒng)的設(shè)計計算 13 料斗倉重量計算 13 提升系統(tǒng)的設(shè)計計算 14 導軌強度校核 14 導軌剛度校核 18 提升系統(tǒng)電動機選擇 21 選擇電動機類型和結(jié)構(gòu)型式 21 選擇電動機的容量 21 選擇電動機的型號 234 機架的設(shè)計及校核 27 機架結(jié)構(gòu)類型 27 按機架外形分類 27 按機架的制造方法和材料分類 27 機架結(jié)構(gòu)的選擇 27 機架設(shè)計計算的準則和要求 27 機架設(shè)計的準則 28 機架設(shè)計的一般要求 28 機架的形式及主要參數(shù) 28 機架的強度校核 30 機架的剛度校核 35 立柱的強度及穩(wěn)定性校核 415 檢驗安裝和使用維修 43 檢驗規(guī)則 43 吊裝，安裝和調(diào)整 43 使用操作 43 維修保養(yǎng)和故障排除 446 總結(jié) 45參考文獻 46致 謝 471 緒 論現(xiàn)今世界化肥產(chǎn)量每年增長率約為2%～3%，而中國的增長率一直在 10%以上，而且這一勢頭還將延續(xù)。s agricultural market has long been coveted for a long time, China39。s fertilizer industry BB thinking, if we say that the first Development Forum BB fertilizer industry victory held for us a clear development goals, so this session should be convened to develop the Forum is to explore to achieve this objective we need to do efforts. BB fertilizer Industry in China39。關(guān)鍵詞：機遇挑戰(zhàn)發(fā)展AbstractSince Chinese accession to the World Trade Organization, China access to a more stable international trading environment, businesses are faced with major opportunities and challenges, the fertilizer industry is no exception, BB fertilizer soil testing as an important fertilizer Fertilization species, the more to more attention from all sides, the Chinese cooperation conform to the trend of the times Times special agricultural development, the industry39。由于水平有限。這個課題主要包括總體方案的確定和傳動系統(tǒng)尺寸的確定及計算。涅盤之后得到的將是永生。中國BB肥行業(yè)的發(fā)展正處在一個十分關(guān)鍵的時期，面臨著各種機遇和挑戰(zhàn)，機遇就是黨和政府對“三農(nóng)”問題的高度重視、社會主義新農(nóng)村建設(shè)、國家對測土配方施肥工程的大力提倡，社會大環(huán)境給BB肥提供了廣闊的發(fā)展空間，農(nóng)資人的睿智為BB肥描繪了光明的發(fā)展前景，但是還要看到，隨著市場經(jīng)濟對農(nóng)資行業(yè)的浸透，WTO保護期的結(jié)束，國外農(nóng)資大鱷對中國農(nóng)資的分銷市場早已垂涎已久，我國化肥行業(yè)面臨著前所未有的挑戰(zhàn)。BB肥生產(chǎn)設(shè)備提升系統(tǒng)設(shè)計 本 科 畢 業(yè) 設(shè) 計題目： BB肥生產(chǎn)設(shè)備提升系統(tǒng)設(shè)計 學 院： 姓 名： 學 號： 專 業(yè)： 年 級： 指導教師： 45摘 要自從我國加入世界貿(mào)易組織以來，我國獲得一個更加穩(wěn)定的國際貿(mào)易環(huán)境，各行各業(yè)都面臨著重大的機遇和挑戰(zhàn)，肥料行業(yè)也不例外，BB肥作為實現(xiàn)測土配方施肥的重要肥種，越來越受到各方面的重視，中華合作時報農(nóng)資?？槕?yīng)時勢發(fā)展，組織業(yè)內(nèi)精英共聚一堂、各抒己見，共同探討中國BB肥行業(yè)的發(fā)展思路，如果說第一屆BB肥行業(yè)發(fā)展論壇的勝利召開為我們指明了發(fā)展目標，那么此屆發(fā)展論壇的召開應(yīng)該是探討達到這個目標我們所需要做的努力。中國化肥行業(yè)，特別是BB肥行業(yè)，應(yīng)該團結(jié)起來、發(fā)揮整體優(yōu)勢，做大自己，抵御來自國外BB肥的強烈沖擊。這樣，BB肥生產(chǎn)設(shè)備在我國也必然有很好的發(fā)展前景，本設(shè)計課題是（9BBⅡ型）BB肥生產(chǎn)設(shè)備總體設(shè)計及傳動系統(tǒng)設(shè)計。完成這個課題，能夠讓我們學會如何將課堂上所學的理論知識更好的應(yīng)用到社會實踐中去。本論文中必然存在不少紕漏和錯誤，敬請評閱老師們批評指正。s elite organizations together to express their views and to discuss China39。s development is at a very critical period, facing a variety of opportunities and challenges, opportunities and the government is the party of Three Rural Issues attached great importance to building a new socialist countryside, the state soil testing Fertilization a strong proponent of the project, social environment to BB fertilizer provides a broad space for development of human wisdom for agricultural fertilizer BB painted a bright future, but would also like to see, with the market economy on the agricultural industry immersion, the end of protection period WTO, foreign agricultural predators of the distribution of China39。s fertilizer industry is faced with unprecedented chal