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XX大學(xué) 畢業(yè)論文（設(shè)計(jì)）開題報(bào)告 課題名稱 山藥挖掘收獲機(jī)的設(shè)計(jì) 學(xué)生姓名 學(xué) 號 所屬學(xué)院 機(jī)械電氣化工程學(xué)院 專 業(yè) 農(nóng)業(yè)機(jī)械化及其自動化 班 級 指導(dǎo)教師 起止時(shí)間2015.11.10-2016.5.28 機(jī)械電氣化工程學(xué)院教務(wù)辦制 填 表 說 明 一、學(xué)生撰寫《開題報(bào)告》應(yīng)包含的內(nèi)容： 1、本課題來源及研究的目的和意義； 2、本課題所涉及的問題在國內(nèi)（外）研究現(xiàn)狀及分析； 3、對課題所涉及的任務(wù)要求及實(shí)現(xiàn)預(yù)期目標(biāo)的可行性分析； 4、本課題需要重點(diǎn)研究的、關(guān)鍵的問題及解決的思路； 5、完成本課題所必須的工作條件及解決的辦法； 6、完成本課題的工作方案及進(jìn)度計(jì)劃； 7、主要參考文獻(xiàn)（不少于7篇）。 二、本報(bào)告必須由承擔(dān)畢業(yè)論文（設(shè)計(jì)）課題任務(wù)的學(xué)生在接到“畢業(yè)論文（設(shè)計(jì)）任務(wù)書”的兩周內(nèi)獨(dú)立撰寫完成，并交指導(dǎo)教師審閱。 三、開題報(bào)告要求手寫體，字?jǐn)?shù)在3000字以上，由學(xué)生在本報(bào)告冊內(nèi)填寫，頁面不夠可自行添加A4紙張。 四、每個(gè)畢業(yè)論文（設(shè)計(jì)）課題須提交開題報(bào)告一式三份，一份學(xué)生本人留存，一份指導(dǎo)教師存閱，一份學(xué)生所在學(xué)院存檔，備檢備查。 一 本題來源及研究的目的和意義 1.1 課題的來源：自選題 1.2 研究的目的 長期以來，山藥都是靠傳統(tǒng)的人力收獲，山藥的根莖較長，深入地下，難以采收， 如果收獲技術(shù)不夠成熟，根莖破損率就會很高。我國大部分地區(qū)山藥的收獲都是依靠人工來完成的。不但勞動強(qiáng)度大，作業(yè)效率低，而且在挖取時(shí)容易鏟斷、鏟傷山藥，影響其品質(zhì)和商業(yè)價(jià)值。因而研制開發(fā)山藥收獲機(jī)械，已成為山藥產(chǎn)業(yè)發(fā)展的迫切需求。 1.3 研究的意義 本課題設(shè)計(jì)采用螺旋提土機(jī)構(gòu)、送土板、分土器的等裝置對山藥進(jìn)行挖掘收獲。設(shè)備能在理論上為山藥的挖掘收獲提供一定的技術(shù)支撐。 二 課題所涉及的問題在國內(nèi)外現(xiàn)狀及分析 2.1 國內(nèi)現(xiàn)狀 為了克服山藥收獲過程中易折斷和損傷的難題，我國廣大設(shè)計(jì)者和科學(xué)家們進(jìn)行了刻苦的鉆研，以下是現(xiàn)階段我國對山藥收獲機(jī)械化得研究現(xiàn)狀。資料知識查自中國知識產(chǎn)權(quán)局專利檢索網(wǎng)站。 第一種是多功能山藥收獲機(jī)，履帶底盤，設(shè)置在履帶底盤上的操作臺、豎直機(jī)構(gòu)、電機(jī)、向上提升機(jī)構(gòu)、安裝在機(jī)架上并且能夠沿固定的機(jī)架上下移動的齒輪箱的總成， 安裝在齒輪箱結(jié)構(gòu)下面的用于開溝的螺旋鉆軸和提土板，所述電機(jī)結(jié)構(gòu)與齒輪箱結(jié)構(gòu)由傳動軸實(shí)現(xiàn)傳動連接；提升機(jī)構(gòu)與齒輪箱結(jié)構(gòu)連接，實(shí)現(xiàn)對齒輪箱結(jié)構(gòu)的升降操作；山藥收獲裝置還包括設(shè)于箱結(jié)構(gòu)一側(cè)，能夠?qū)㈤_溝軸開出的土，向外送給送土器，以及設(shè)于履帶下部前面的能夠?qū)崿F(xiàn)把土填回功能的送土器。這種山藥收獲機(jī)的結(jié)構(gòu)比較靈活，而且功能多樣化，能夠同時(shí)實(shí)現(xiàn)收獲山藥和溝內(nèi)填土的兩項(xiàng)功能，除了采收山藥外，還可以開電纜溝、管道溝、實(shí)現(xiàn)一機(jī)多種用法，省時(shí)省工，具有相當(dāng)大的市場價(jià)值。 第二種是鏈?zhǔn)缴剿幨斋@機(jī)，這個(gè)專利創(chuàng)新目的在于，克服現(xiàn)階段生產(chǎn)技術(shù)的不足之處，提供一種山藥收獲機(jī)的理論設(shè)計(jì)，在不損傷山藥塊莖的前提下，可以很大地提高生產(chǎn)效率，降低采收山藥時(shí)的成本。此專利所述的山藥收獲機(jī)，包括振動破土機(jī)構(gòu)、破土機(jī)構(gòu)的固定架、旋轉(zhuǎn)型軸承座、液壓油缸、可以左右移動的軸承固定支架、懸掛型四軸固定支架、手輪、擋土板、開溝刀片、開溝鏈條、鏈條固定支架和從動輪。破土機(jī)構(gòu)固定架是這個(gè)專利的主體支撐架，整體呈現(xiàn)方形的框架結(jié)構(gòu)，破土機(jī)構(gòu)固定支架的后端，連接著設(shè)置的振動破土機(jī)構(gòu)，破土機(jī)構(gòu)固定支架的前端，連接著旋轉(zhuǎn)式軸承座，旋轉(zhuǎn)軸承座的前面連接著液壓油缸，液壓油缸的前端連接到左右移動軸承座固定架，左右移動軸承座固定架設(shè)置在懸掛式四軸連接在固定架上，在懸掛型四軸固定支架的一邊，設(shè)計(jì)的有手輪，在懸掛型四軸固定支架的兩端后側(cè)，設(shè)計(jì)有擋泥板。在旋轉(zhuǎn)型軸承座的下端，連接設(shè)計(jì)有鏈條固定支架，鏈條固定支架的前端設(shè)計(jì)有主動輪，鏈條固定支架的后端設(shè)計(jì)有從動輪，繞過主動輪與從動輪，設(shè)計(jì)有開溝鏈條，開溝鏈條的外表面上設(shè)置有開溝刀片。連接到鏈條固定架上，設(shè)置有張緊固定架，張緊固定架的下端設(shè)置有張緊輪，張緊輪與開溝鏈條的內(nèi)表面相接觸。 2.2 技術(shù)創(chuàng)新 我國山藥收獲機(jī)的設(shè)計(jì)還處于初級階段，還需要生產(chǎn)推廣。 三、對課題所涉及的任務(wù)要求及實(shí)現(xiàn)預(yù)期目標(biāo)的可行性分析 3.1 課題任務(wù)要求 本裝置主要用于山藥的的挖掘收獲，通過選擇合適的方法設(shè)計(jì)挖掘收獲裝置，使裝置能夠?qū)崿F(xiàn)對山藥的收獲。 四、本課題需要重點(diǎn)研究的關(guān)鍵的問題及解決的思路 4.1 本課題需要研究的重點(diǎn)問題 設(shè)計(jì)產(chǎn)品時(shí)要考慮收獲機(jī)的挖掘深度要足夠；還要考慮利用收獲機(jī)進(jìn)行收獲時(shí)，避免損傷和弄斷山藥，盡量少的破壞山藥的塊莖。 4.2 本課題需要研究的難點(diǎn)問題解決的思路 通過對現(xiàn)有山藥收獲機(jī)的研究與考察，發(fā)現(xiàn)現(xiàn)階段山藥收獲機(jī)有兩個(gè)無法實(shí)現(xiàn)的難題：1、裝置在開溝后仍然需要大量的人力勞動來完成后續(xù)的采收。2、在后續(xù)人力采收的工程中，比較容易損壞山藥的塊莖。想要克服這些問題，必須盡量使山藥收獲機(jī)開溝后，山藥所在土塊要有所松動，使山藥與土壤的結(jié)合不在緊密。在裝置作業(yè)之后，人工收山藥的過程中，能夠更直接。這樣就能提高山藥的完整性，盡量少的破壞山藥的塊莖。 五 完成本課題需要的工作條件及解決的辦法 完成本課題所必須做的工作有利用學(xué)校圖書館及互聯(lián)網(wǎng)查閱大量資料，了解山藥的基本性質(zhì)、種植、山藥收獲機(jī)的原理等。關(guān)鍵問題可請求老師指導(dǎo)或通過同學(xué)討論，選擇適合山藥收獲機(jī)類型，對擬定的收獲機(jī)進(jìn)行設(shè)計(jì)，計(jì)算，利用Auto CAD等繪圖軟件繪制出山藥收獲機(jī)的零件圖，裝配圖，反復(fù)對設(shè)計(jì)內(nèi)容進(jìn)行檢驗(yàn)、校核。 六 工作方案及進(jìn)度計(jì)劃 工作方案：設(shè)計(jì)總體含括→螺旋提土機(jī)構(gòu)設(shè)計(jì)→送土板設(shè)計(jì)→分土器設(shè)計(jì)→機(jī)體及外圍設(shè)備設(shè)計(jì)→機(jī)體有機(jī)組合。 進(jìn)度計(jì)劃： 第1周—第2周 通過查找文獻(xiàn)資料，了解山藥收獲機(jī)的國內(nèi)外現(xiàn)狀。 第2周—第5周 設(shè)計(jì)山藥挖掘收獲機(jī)的總體方案。 第6周—第9周 對山藥收獲機(jī)的結(jié)構(gòu)進(jìn)行具體設(shè)計(jì)。 第10周—第12周 撰寫設(shè)計(jì)說明書，對部分問題修改、調(diào)整。 第13周—第14周 整理資料準(zhǔn)備答辯。 七 參考文獻(xiàn) [1]劉衛(wèi)華.邱建興.劉敏.沈啟揚(yáng).江蘇農(nóng)機(jī)化[M].江蘇：中國學(xué)術(shù)期刊網(wǎng)絡(luò)出版總庫,2015:18-20. [2]濮良貴.紀(jì)名剛.機(jī)械設(shè)計(jì)(第八版)[M]. 北京：高等教育出版社.2006 [3]梁學(xué)強(qiáng).張景崎.翟雯雯.丁潤鎖.尚立.運(yùn)杰.農(nóng)業(yè)技術(shù)裝備[M].天津：2012 [4]孫桓，陳作模，葛文杰.機(jī)械原理[M].北京：高等教育出版社.2006.5 [5]劉鴻文.材料力學(xué)I（第五版）[M].北京：高等教育出版社.2011.1 [6]洪忠德.簡明機(jī)械設(shè)計(jì)手冊.上海：同濟(jì)大學(xué)出版社.2002.5 [7]孫桓，陳作模，葛文杰.機(jī)械原理[M].北京:高等教育出版社.2006.5 [8]于萬勝.河北工業(yè)大學(xué)[M].河北.2014 [9]許波.韓有泉.王亞旭.關(guān)玉明.農(nóng)機(jī)化研究[M].河北.2015 [10] 江洪，酈祥林，李仲興.SolidWorks 2006基礎(chǔ)教程[M]. 北京：機(jī)械工業(yè)出版社，2006.1 [11] 繆明;山藥機(jī)械化種植技術(shù)的研究與開發(fā)[J];江蘇農(nóng)機(jī)化;2002（2） [12] 李壘，李善文. 多功能山藥收獲機(jī)[P].中國專利：201310650116.5，2013.12.06 學(xué)生簽名 年 月 日 指導(dǎo)教師審閱意見 指導(dǎo)教師簽名 年 月 日 2950 Niles Road, StJosepli _ 49085-9659, USA 269.429-0300 fax 26S.4293SS2 hc|#asabe.org www.asabe.org An ASABE Meeting Presentation Paper Number: 084469 7760 Cotton Picker Jason D. Wattonville John Deere Des Moines Works, Ankeny, Iowa, USA Written for presentation at the 2008 ASABE Annual International Meeting Sponsored by ASABE Rhode Island Convention Center Providence, Rhode Island June 29 - July 2，2008 Abstract. The John Deere 7760 Cotton Picker, with on-board module building technology, offers customers the next revolution to cotton harvesting machinery. The 7760 breaks through the productivity barrier by way of virtual non-stop harvest. The 7760 can harvest non-stop or continuously pick while forming, wrapping, ejecting and carrying a round module. Building round modules on-board the machine eliminates most field support equipment and the additional labor and costs associated with it. Wrapping the round modules in waterproof plastic wrap provides better protection to preserve cotton fiber and cotton seed quality while containing the cotton in the module so minimal cotton is lost during handling and transport. Some other key features of the 7760 include a Tier III emissions compliant 13.5L engine (500 hp), Pro Drive? powershift transmission, CAN BUS electronics, updated operator station, and improved serviceability and diagnostics. Keywords. Agricultural Equipment, Cotton, Cotton Harvesters, Farm Machinery, Harvesting Machinery The authors are solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of the American Society of Agricultural and Biological Engineers (ASABE), and its printing and distribution does not constitute an endorsement of views which may be expressed. Technical presentations are not subject to the formal peer review process by ASABE editorial committees; therefore, they are not to be presented as refereed publications. Citation of this work should state that it is ftorn an ASABE meeting paper. EXAMPLE: Author's Last Name, Initials. 2008. Title of Presentation. ASABE Paper No. 08-—. St. Joseph, Mich.: ASABE. For information about securing permission to reprint or reproduce a technical presentation, please contact ASABE at iutter@asabe.org or 269-429-0300 (2950 Niles Road, St. Joseph, Ml 49085-9659 USA). 7760 Cotton Picker Introduction Feedback from a worldwide customer base, representing all segments of the cotton industry, expressed the need to enhance and improve the entire cotton production chain — a chain that includes harvesting, handling, transporting and ginning seed cotton. The overall customer request was to "help us- reduce our labor, reduce our assets, increase our flexibility and help us preserve fiber quality." To provide a solution of increased efficiency and profitability, we needed a systematic paradigm shift (see Figure 1) which involved 3 groups of constituents: farmers, transporters and ginners. Input from those constituents helped define the requirements for a new generation cotton harvester, the John Deere 7760 Cotton Picker. Equipped with built-in module-building technology, the 7760 is a revolutionary cotton-harvesting machine which streamlines the stages of cotton production, from the initial picking of the plant to the completion of the lint bale. Figure 1, 7760 Harvesting System Approach  project Description FigCire 2. Current Basket Picker Harvesting Process Typically, every 6 row cotton picker requires four pieces of support equipment along with labor to operate that equipment (see Figure 2). The labor, cost and management challenges associated with supporting cotton harvest is one of the primary drivers and inspiration for the 7760 and producing round modules on-board the harvester. Development of producing modules on-board cotton pickers began as far back at the 80’s. John Deere began experimenting with various packaging techniques to determine optimum size and shape for building cotton modules on-board the cotton harvester. Since the industry had standardized on conventional modules, early experiments involved partitioning a conventional module builder to evaluate partial size modules. The major issues to be addressed with this concept were: 1) the lack of module integrity; 2) the low package (module) density; 3) the requirement of the vehicle to stop for module unloading. These issues would have contributed to higher transportation costs, lower ginning efficiency and unimproved or reduced harvesting productivity. Additionally, the smaller “mini” modules did not offer improvements in handling, transportation or improvements to fiber preservation. Since these issues resulted in not meeting the requirements that our customers were asking for, the focus was turned to an alternate package type, the round module (bale). The first advantage we saw in the round shape was that it sheds water naturally and lends itself to being covered automatically. A waterproof protective covering completely around the circumference of the round module helps preserve the fiber and reduce seed cotton losses incurred by handling and/or transportation. Additionally, the round module enables the 7760 to harvest non-stop resulting in a dramatic machine productivity increase of 20% or more. The 7760 eliminates the time spent unloading, waiting for boll buggies, or driving back and forth to a module builder as round modules can be wrapped, ejected, carried and dropped at the turn row without ever needing to stop themachine. The non-stop harvesting function of the 7760 Picker trims approximately five days off of the typical four-week harvest. The vision for this program is as follows: ? Reduce labor requirements ? Improve asset utilization ? Increase productivity ? Lower harvesting costs ? Preserve cotton fiber and reduce losses ? Increase handling and transportation option The performance requirements for this vehicle are outlined in Table 1. In many cases, our requirements were based against the current 9996 cotton picker since it has and continues to be the market leader in the 6 row class of cotton pickers. Table 1: 7760 Performance Requirements Model 7760 Productivity increase over 9996 20% Ability to non-stop harvest (up to 4 bale/acre yields at 4.2 mph) Yes Fluid capacity 12 hrs Continuous Improved shift-ability Yes Locked wheel during powered brake turn Yes Field transport height Equivalent to 9996 Shipping height Equivalent to 9996 Flotation Equal or greater than 9996 Tractive efficiency Equal or greater than 9996 Tractive effort Equal or greater than 9996 Standard front dual drive tires Yes Option single front drive tires No Improved maneuverability over 9996 Yes Tier III emissions compliant ? Yes  Accumulator Round Module Builder j Wrap Mechanism Figure 3. Machine Cut-Away Theory of Operation 'i he following section describes the theory of operation of the round module building process on-board the 7760. Please refer to Figure 3 in this section. Accumulator Accumulator technology and monitoring provides an 8.5 mA3 (300 ftA3) chamber or buffer that temporarily stores 1000-1200 lb seed cotton during the wrap and eject process. This buffer is what allows the machine to harvest non-stop. The accumulator working in conjunction with a double reverse flighted auger ensures an even and uniform flow of cotton is delivered to the round module builder resulting in consistent cylindrical formed round modules in all conditions. Mounted to the top of the accumulator is the lid extension and hood. It contains perforated screens and fingergrates that provide a means to separate trash from the cotton and also provides self-raising and lowering of the ducts. Sensors monitor the level of cotton within the accumulator to start and stop the feeding process f「om the accumulator into the round module builder. Feed rolls convey cotton from the accumulator to the feeder belt. The feed roll metering system is patented technology. Feeder Cotton received from the accumulator feed rolls is transported via a rubber belt and compressed between this belt and a laydown roller resulting in a uniform ribbon (or mat) of cotton presented to the entrance or throat of the round module builder. The feeder is also patented technology developed jointly between John Deere and PA Consulting. Round Module Builder The round module builder has the capability to automatically build, wrap, eject (on demand), and drop uniform and consistent modules without stopping the machine. The round module builder is powered by an electronic controlled hydrostatic system that operates in conjunction with the feeder system. The round modules can be variable in size up to the target diameter of 2439 mm (90，’）and a width of 2388mm (94，，）and will weigh approximately 5000 lbs depending on moisture content of the cotton. This size of module will allow unloading on one end of the field in all but extreme operating conditions (high yields and long rows). Portioned Wrap & Wrap System The round module covering consists of an industry first portioned wrap (eliminates a cutting mechanism) made of a non-contaminating LLDPE material. LLDPE, is the same material used for lint bale covers today and is recyclable. The wrap will provide package integrity, puncture resistance, and full surface coverage with an edge-wrap feature (CoverEdge?) to provide weather resistant protection for the seed cotton package. Wrap will be provided in rolls that weigh 100 kg (220 lbs) and contain 22 portions. The wrap mechanism will have the capability to separate the portioned wrap as it is applied to the round module during the wrapping process. Fully loaded, the machine can carry 110 wraps (five rolls). One roll is positioned in the wrap mechanism with four .additional rolls in the magazine. This provides more than enough wraps to complete a 12 hour harvest day. Handler The handler carries a round module to the desired field staging location. It also provides a means to lower the round module builder down to an acceptable shipping and field transport height. The rear gate of the round module builder rests in slots located on the handler which guides the builder into this configuration. Figure 4 shows the machine in field transport configuration. Figure 4. Field transport position ltAuto" Mode Module Building "Auto" mode enables the machine via electronics, hydraulics, software and sensors to automatically control the building of each round module. “Auto” mode is engaged by pushing one button on the hydro handle alleviating the complexity of module making. During the automated round module building process, the comerpost and armrest displays provide clear and concise feedback to the operator indicating exactly where the machine is at in executing the process. The round module builder or baler does not run continuous, but rather cycles on and off as needed. The cycle is controlled by 2 sets of infrared through-beam sensors. The upper sensors sense when the accumulator is full, initiating the module building cycle to start. The cycle continues until the lower set of sensors are activated stopping the cycle. This repeats itself until the round module reaches its maximum diameter of 90，，. When it reaches 90”，the cotton flowing from the accumulator is stopped and the wrap cycle is automatically initiated wrapping the round module. After the round module is wrapped, the operator interface asks the operator to eject. Confirmation is required to eject the round module out onto the handler. Cotton continues to pour into the accumulator during the wrap and eject cycle. After the round module has been ejected and the gate closes, the system is ready to repeat itself. Key Features Non-Stop Harvest “Auto" mode, described in the previous section, enables the machine to automatically control the building of each round module allowing the picker to harvest continuously while forming, wrapping, ejecting and unloading round modules from the machine. Eliminating stops, for any reason, keeps the picker harvesting cotton. Operator Station The 7760 features a newly designed cab for a much improved operator's environment. New operator interfaces have been added that include a CommandCenter display mounted to the revised and updated armrest (see Figures 5 and 6). The cab layout has been revised to provide for an LCD based Cornerpost Display, updated armrest control locations, Harvest Doc Cotton ready, and overhead console revisions. With the addition of the CommandCenter display, information such as internal alarms, diagnostic trouble codes, diagnostic addresses, calibrations, mode management setup screens, set point adjust, and text displayed messages are available to the operator. The addition of the LCD based Cornerpost Display Unit provides for a dedicated round module builder display (see Figure 6), as well as a display for general harvest monitoring. Harvest warning indicators have been added for complete operator warning annunciation. Figure 5. The all-new CommandCenter display and CommandTouch console ■jepijnq a|npoiu punoj pjeoq-uo am oj |o」iuoo o!6o| 6u!p!AOJd Aq e|q!ssod BujiseAjeq dojs-uou se>iBLU Lp!i|M BunseAjeii epoiu ?。雨? 6u!p!Aaid joj euoq>|oeq s! ainpsijipje Sim S0SS9UJB4 6uu|m jo uo!pnp9J pue sAe|ej uo,!oi!|a ai|i ‘sesn“o jeqiunu am eonpej SJ01U9O j0Mod 9兩s-p!|0s Lji!M uo!!ounfuo3 u! pesn 'sjeea uiiop Xq pedo|ey\ep |sjs||ojituoo ,xoq xey, uo peseq s! ajeMpjei] ei|i sejijiiqedBO o!isou6e!p p9A0」duj! 9|q!jediuo3 JosjApy 90|AJ9S s! pue s|ooo!ojd NVO pjepue^s Aflsnpu! luejjno uo psseq s! ainp列ipje |eo!jp9|9 ei|j_ so!uono&i3 paseg ' Ae[ds;p jsodjaujoo _9 3jn6|j Electronic Unit Synchronization Currently, picking unit synchronization to ground speed is done via a mechanical link between the ground drive and unit drive hydrostatic pumps. Each machine requires adjustment as part of the manufacturing process. The 7760 program has developed the electronic unit speed synchronization system. This technology eliminates the synchronization adjustment in manufacturing and delivers synchronized unit speed at picking speeds up to 4.2 mph. The improved range of synchronization improves the picking efficiency of the machine. System calibrations provide for precise and accurate control of the picking unit speeds for the entire harvest range. ProDrive? Automatic Shift Transmission The 7760 also has a new electronic controlled 2-speed powershift transmission with automatic shifting and independent hydraulic wet disc brake design with an integrated spring applied, hydraulic released park brake. Increased tractive effort and higher loads will be carried through a high capacity four pinion differential with hydraulically actuated differential lock to more effectively and reliably transfer the power to the ground in adverse as well as normal conditions. Electronic Controlled Variable Speed Hydrostatic Ground Drive ProDrive? Automatic-ShiftTransmission (AST) ? Picking Mode 6.8 kph (4.2 mph) ? Scrapping Mode 8.1 kph (5.0 mph) ? Field Transport Mode 14.5 kph (9.0 mph) ? Road Transport Mode 27.4 kph (17.0 mph) Power Module The heart within the power module is a tier III emission certified 13.5L John Deere PowerTechPlus? engine rated at 373 kW (500 HP) @ 2100 RPM. Coupled to this powerplant is a direct drive pump drive gearbox which provides efficient transfer of power to the hydrostatic, hydraulic systems and cotton fans. Walk-under Mainframe The new mainframe design allows walk-under clearance into the power-module area to improve access into the engine compartment for daily service and maintenance. Air System In order to meet the increased cotton conveying demands due to increasing ground speed to 4.2 mph, twin high efficiency fans deliver improved air flow rates and consume less power. Mechanical Rear Drive Axle The on-board cotton handling/moduling system added nearly 20,000 lbs of weight to the rear axle compared to our current 9996 cotton harvester. A new rear axle and tire size (see Figure 7) were developed to address higher vehicle weights (without increasing ground compaction), increased tractive effort requirements and increased maneuverability requirements. Figure 7. Mechanical rear axle By converting to larger radial constructed rear tires, ground compaction under the rear tires remains comparable to the 9996. The static loaded rolling radius increased 30% over the 9996. The new rear axle is powered 100% of the time by an electronically controlled hydrostatic system. This system works in conjunction with the front axle hydrostatic system to provide increased rim pull while maintaining current transport speed. This translates into a machine that is better at climbing hills and is less prone to getting stuck in muddy conditions. Improvements to turning radius over the 9996 cotton picker, in light of a 20% increase in vehicle wheelbase, are possible due to a 55-degree steer angle, a 34% increase in steer angle over the 9996. This results in improved vehicle maneuverability over the 9996 by actually reducing the vehicle turning radius by over 36%. This reduction allows the machine to turn back on the adjacent unpicked rows without requiring the use of power hydraulic brakes or making a three point turn, resulting in less structural stress, less power, and less time to make the turn. Spec Comparison Rear axle weight comparisons 9996= 18,000 lbs 7760 = 38,000 lbs 111% increase in rear axle weight Tread setting options Same for both a 9996 and 7760 - 30,32,36,38 & 40 in Oscillation comparison 9996 = 8.3 deg 7760 = 9.0 deg 8.4% increase oscillation angle Wheel base comparison 9996= 141" (3.58m) 7760 = 170" (4.32m) 20.6% increase in wheel base Steer angle comparison 9996 = 41 deg 7760 = 55 deg 34.1 % increase in steer angle Turning radius comparison (6 row heads require tighter turning radius to turn back on adjacent 6 rows) 9996 = 236” (5.99m) 7760 = 150”（3.81m) 36.4% reduction in turning radius Ground compaction Within 2-3 psi of 9996 Round Module Handling Figure 9. Round Module Handler CM1100 Figure 8. Staging Round Modules It was already mentioned that the round shape sheds water and the plastic wrap protects the fiber. Some other notable advantages of the round modules include water protection and reduced waste during moving. Notice how the cover-edge on the round module keeps the water away from the fiber (see Figure 10) when exposed to ponding rainfall. And when the round modules are moved, there’s typically less waste as well. Typical waste or cotton left behind in the field and gin yard when moving conventional modules (see Figure 11). Once the cotton is harvested, the round modules are easily staged for conventional module truck pick-up (see Figure 8), moved to high ground if necessary, or loaded for transport. The Frontier Round Module Handler CM 1100，coupled to an 8000 series John Deere tractor, provides an effective solution to move, stage or load round modules (see Figure 9) and also provides the flexibility to do these operations when convenient and when circumstances and manpower allow. 11 Table 2: Machine Specifications Figure 10. Round Modules in Standing Water Figure 11. Waste from Conventional Modules Module Transporting The round modules provide additional flexibility for transporting seed cotton to the gin as either a traditional module truck (see Figure 12), with the chain bed modified slightly, or a standard flatbed trailer can be used (see Figure 13). Figure 12. Conventional Module Truck Figure 13. Flatbed Trailers Ginning We’ve invested a tremendous amount of engineering time and energy to make sure that the round modules are uniform. Uniform in size, density and moisture. This uniformity has proven to be very beneficial to the ginning process. Ginning experts that hav