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畢業(yè)設(shè)計(jì)（論文） 題目名稱 磨粉磨漿機(jī)的設(shè)計(jì)和研究 題目類別 畢業(yè)設(shè)計(jì) 學(xué)院（系） 專業(yè)班級(jí) 機(jī)械設(shè)計(jì)制造及其自動(dòng)化 學(xué)生姓名 指導(dǎo)老師 開題報(bào)告日期 2007年11月10日 外文翻譯 MME 新型磨粉機(jī)設(shè)計(jì) 【摘要】就MME 新型磨粉機(jī)的特點(diǎn), 如外觀布局、鑄鐵底座、磨輥組自承研磨力、彈性張緊結(jié)構(gòu)、變頻喂料系統(tǒng)、刮刀清理等進(jìn)行了簡要說明和分析。 【關(guān)鍵詞】磨粉機(jī); 磨輥; 變頻喂料系統(tǒng) 1. MME型磨粉機(jī)的介紹 ? ?MME磨粉機(jī)是2005年推出的一種新機(jī)型， 該機(jī)是在MDDK磨粉機(jī)近十年的實(shí)踐基礎(chǔ)之上，吸收國內(nèi)外的先進(jìn)經(jīng)驗(yàn)，開發(fā)的一種新型磨粉機(jī)，較MDDK磨粉機(jī)有如下特點(diǎn)： 1) 外觀合乎人機(jī)工程學(xué)原理，門式外置開啟，在工作中檢查、更換元件方便，省力。 鑄鐵底座綜合性能優(yōu)良 2) 觀察筒成橢圓錐形。橢圓形觀察筒不僅外形美觀，而且沒有死角，改進(jìn)存料條件，不易粘料。 3) 軋距調(diào)節(jié)省力、容易。調(diào)節(jié)原理不同，改變了受力點(diǎn)，在開機(jī)狀態(tài)下，容易調(diào)節(jié)到理想狀態(tài)。 4) 軋距調(diào)節(jié)機(jī)構(gòu)氣動(dòng)鎖緊。目前國內(nèi)外磨粉機(jī)幾乎全部為機(jī)械鎖緊，MME磨粉機(jī)實(shí)現(xiàn)為氣動(dòng)鎖緊，操作方便，絕對(duì)鎖緊。 5) 獨(dú)特的彈性自動(dòng)補(bǔ)償齒楔帶張緊裝置。該裝置能自動(dòng)補(bǔ)償帶長度的微量變化提高帶的使用壽命。 6) 刮刀清理自動(dòng)分離機(jī)構(gòu)。當(dāng)磨粉機(jī)磨輥離軋時(shí)，刮刀與磨輥?zhàn)詣?dòng)分離，杜絕刮刀與磨輥在無料情況下直接磨擦，保護(hù)磨輥，提高刮刀使用壽命。 7) 簡捷的喂料輥清理單元。喂料輥不須外移就能很方便地清理喂料輥后的積垢，活動(dòng)清理單元，改善了磨粉機(jī)內(nèi)衛(wèi)生狀況，降低了裝配和維修難度。 2. 獨(dú)特的外形設(shè)計(jì) 1) 磨粉機(jī)外形 磨粉機(jī)的機(jī)體高度、磨輥中心高度、微調(diào)手輪中心高度、外罩分體高度、機(jī)體過渡半徑、外罩圓弧半徑及整體外形比例分配等技術(shù)參數(shù)分別是通過形象設(shè)計(jì)進(jìn)行的; 該機(jī)的外觀設(shè)計(jì)獲國家專利, 專利號(hào)為ZL 01 3 4997216 。 2) 進(jìn)料筒 進(jìn)料筒為橢圓錐形, 采用優(yōu)質(zhì)有機(jī)玻璃板整體模壓成型, 不僅外形美觀、便于觀察, 而且能更好地使物料均勻自流地分布到喂料輥的全長上。 3) 旋轉(zhuǎn)護(hù)罩 磨粉機(jī)兩側(cè)護(hù)罩采用旋轉(zhuǎn)開門式結(jié)構(gòu), 只需反轉(zhuǎn)拉手即可打開, 關(guān)上后靠磁性自動(dòng)吸附在機(jī)體上, 不需要任何輔助工具即可實(shí)現(xiàn)快速開關(guān)護(hù)罩, 操作靈活方便, 防護(hù)效果更好。 4) 鑄鐵底座 該機(jī)采用鑄鐵底座, 與鋼板底座相比, 具有結(jié)構(gòu)堅(jiān)固、不變形、減震和抑制噪聲等優(yōu)點(diǎn); 機(jī)體采用上下剖分式結(jié)構(gòu), 上部側(cè)機(jī)架采用優(yōu)質(zhì)鋼板焊接而成, 上下部分用螺絲聯(lián)接, 中間有減震墊, 整機(jī)無論從功能、壽命、美觀、操 作和維護(hù)等方面都進(jìn)行了優(yōu)化設(shè)計(jì), 具有優(yōu)越的綜合性能。 3. 磨粉機(jī)結(jié)構(gòu)設(shè)計(jì) 1） 磨輥組 2.1 磨輥組自承研磨力結(jié)構(gòu) 單獨(dú)承受應(yīng)力磨輥組結(jié)構(gòu)簡單、操作靈敏?？燧佪S承座6 固定在支撐橫梁13 上, 慢輥軸承座8 騎跨在支撐橫梁上, 與偏心輪12 配合, 氣缸14 的活塞桿伸出與縮回使轉(zhuǎn)臂15 旋轉(zhuǎn), 同時(shí)偏心輪轉(zhuǎn)動(dòng), 使慢輥軸承座相對(duì)快輥中心平動(dòng), 完成磨輥離合閘動(dòng)作, 見圖2 。 2.2 粗調(diào)軋距 調(diào)整粗調(diào)螺母5 , 通過拉桿7 帶動(dòng)預(yù)壓碟形彈簧組10 、慢輥軸承座8繞偏心輪12 轉(zhuǎn)動(dòng), 使慢輥中心相對(duì)快輥中心前后移動(dòng), 使軋距得到調(diào)整。 2.3 微調(diào)軋距 轉(zhuǎn)動(dòng)微調(diào)手輪1 , 微調(diào)螺桿3 驅(qū)使微調(diào)杠桿4 繞支點(diǎn)旋轉(zhuǎn), 驅(qū)使氣缸移動(dòng), 使轉(zhuǎn)臂15 旋轉(zhuǎn), 帶動(dòng)偏心輪、慢輥軸承座移動(dòng), 使慢輥中心與快輥中心產(chǎn)生相對(duì)位置的改變。由于杠桿比較大, 軋距調(diào)整準(zhǔn)確, 更為省力。 2） 輥間傳動(dòng) 2.4 三輪系傳動(dòng)結(jié)構(gòu) MME 新型磨粉機(jī)的輥間采用三輪系傳動(dòng)結(jié)構(gòu), 布局合理、結(jié)構(gòu)緊湊, 并選用齒楔帶傳遞動(dòng)力。該齒楔帶具有軸向定位功能, 在傳遞過程中不跑偏、不跳齒。該齒楔帶采用了性能優(yōu)良的新型材料, 抗拉體采用強(qiáng)度高、延伸率小的進(jìn)口玻璃纖維和鋼絲繩, 本體層為綜合性能優(yōu)良的氯丁橡膠, 齒楔帶表面覆蓋的尼龍織物具有低摩擦和高耐磨性, 因此齒楔帶是目前磨粉機(jī)輥間傳動(dòng)的最佳選擇。 2.5 張緊輪 原張緊輪為楔輪, 在加工、裝配過程中難度大, 尤其是裝配時(shí)快輥輪和張緊輪的軸線必須平行, 相關(guān)的三帶輪的軸向定位必須確保每一根齒楔帶在垂直于輪軸的各自的運(yùn)動(dòng)平面內(nèi)運(yùn)動(dòng), 若有一輪發(fā)生軸向位移, 勢必造成齒楔帶與輪上齒槽的嚙合發(fā)生偏離, 使齒楔受力不均, 齒楔磨損快,最終導(dǎo)致整條帶搓齒、斷齒以致于斷裂。而現(xiàn)在張緊輪設(shè)計(jì)改進(jìn)為光輪,降低楔輪的加工難度, 提高了加工精度, 當(dāng)帶輪在裝配發(fā)生較小位移時(shí),齒楔帶的楔齒不再受張緊輪齒槽的限制, 從而減少齒楔帶的磨損, 提高了 齒楔帶的使用壽命。 2.6 　彈性張緊結(jié)構(gòu) 　 過去張緊結(jié)構(gòu)為剛性調(diào)整結(jié)構(gòu),齒楔帶在傳遞過程中, 齒楔帶的長度有微量變化時(shí), 就必須調(diào)整張緊輪的位置, 否則就會(huì)影響齒楔帶的使用壽命。現(xiàn)用彈性張緊結(jié)構(gòu)能自動(dòng)補(bǔ)償,齒楔帶長度的微量變化不需隨時(shí)調(diào)整張緊輪的位置。我廠通過反復(fù)實(shí)踐對(duì)比, 證明了改用彈性張緊結(jié)構(gòu), 齒楔帶的壽命延長了3～5 倍。 3） 喂料系統(tǒng) 磨粉機(jī)要保持穩(wěn)定、高產(chǎn)、高效地運(yùn)行, 喂料系統(tǒng)就應(yīng)將一定流量的物料, 以一定的速度均勻準(zhǔn)確地喂入研磨區(qū)。喂料效果的好壞直接影響研磨效果及出粉率的高低。同時(shí), 喂料連續(xù)均勻, 對(duì)減少磨輥的磨損, 延長磨輥及軸承的壽命也有著重要的意義。 3.1 簡單有效的喂料機(jī)構(gòu) 確保喂料的均勻性為了達(dá)到最好的喂料效果, 對(duì)喂料輥與磨輥之間的位置關(guān)系進(jìn)行了合理的定位。應(yīng)用特殊的喂料活動(dòng)擋板機(jī)構(gòu), 使進(jìn)料筒與喂料輥之間有足夠的自由散落角度與空間; 加之喂料門的開啟靈活方便, 喂料輥的齒形根據(jù)用戶工藝位置以及來料的不同在梯形齒、螺紋齒、矩形齒、絞龍齒及光軸 之間方便地選擇。 3.2 變頻喂料系統(tǒng) 為了保證喂料的穩(wěn)定性, 采用最先進(jìn)的變頻喂料系統(tǒng), 其基本工作程序是: 磨粉機(jī)料位的高低由料位傳感器檢測后, 通過接口板的A/ D 轉(zhuǎn)換輸入PLC 控制器, 控制器再根據(jù)輸入的料位信號(hào), 輸出一個(gè)模擬信號(hào)到變頻器, 由變頻器控制喂料電機(jī)的轉(zhuǎn)速, 從而準(zhǔn)確控制磨粉機(jī)的料位。喂料輥電機(jī)的轉(zhuǎn)速可在40～260r/ min的范圍內(nèi)根據(jù)料位的高低自動(dòng)無級(jí)變速, 上下喂料輥由同步齒形帶按一定的速比傳遞, 使入磨物料保持基本穩(wěn)定, 面粉質(zhì)量也得到了保證。 3.3 簡單、方便、衛(wèi)生的清理活動(dòng)單元 在料倉的清理方面, 我們沒有機(jī)械地照搬國外的磨粉機(jī), 把喂料輥?zhàn)鰹橐粋€(gè)整體移出, 增加零部件的作法, 而是從生產(chǎn)實(shí)際出發(fā), 在中心橫梁與喂料輥之間加活動(dòng)板, 方便簡單的機(jī)構(gòu)達(dá)到了同樣的清理效果, 很方便地清理喂料輥后面的積垢, 從而提高了衛(wèi)生標(biāo)準(zhǔn), 也降低了裝配和維修 的難度。 3.4 增加負(fù)壓吸風(fēng)裝置, 改善喂料狀況, 提高研磨效果 在喂料輥下部與研磨區(qū)之上設(shè)計(jì)了一種特殊的吸風(fēng)道, 即負(fù)壓吸風(fēng)裝置。該裝置能降低物料入磨時(shí)因兩輥相向旋轉(zhuǎn)產(chǎn)生的“泵氣”現(xiàn)象, 并降低磨膛的溫度和濕度, 這對(duì)于心磨、渣磨可提高流量, 不噴粉, 并提高研磨效果。同時(shí), 上磨門的玻璃能經(jīng)常保持清潔、透明, 可以很好地觀察喂料室的工況。 4） 　刮刀清理光輥 先進(jìn)的磨粉機(jī)都是用刮刀清理光輥, 刮刀比刷子清理得更干凈衛(wèi)生。我廠設(shè)計(jì)的刮刀清理機(jī)構(gòu)裝配簡單、調(diào)整容易, 耗電量降低了30 %左右,現(xiàn)已在多數(shù)面粉廠家使用, 用戶反映效果比刷子好得多。 5） 　電控系統(tǒng) 整個(gè)控制系統(tǒng)的元件、顯示面板、模塊、PLC 都選用進(jìn)口電器, 整個(gè)編程控制系統(tǒng)的設(shè)計(jì)更科學(xué)、更準(zhǔn)確、更齊全、抗干擾能力更強(qiáng)。單臺(tái)磨粉機(jī)的控制箱安裝在機(jī)體的正前方, 多臺(tái)磨粉機(jī)的電器元件也可集中安裝在遠(yuǎn)離磨粉機(jī)的控制柜里面, 實(shí)行分別控制, 從而遠(yuǎn)離粉塵源, 保護(hù)電器元件, 提高控制質(zhì)量, 便于安裝維修。 6） 　質(zhì)量的保證 為了保證磨粉機(jī)的整體質(zhì)量, 我廠對(duì)該機(jī)各零部件的加工工藝和精度做了高技術(shù)的要求。在加工、裝配、檢查等各個(gè)環(huán)節(jié)都嚴(yán)格地按質(zhì)量標(biāo)準(zhǔn)執(zhí)行。為了保證整體的使用性能, 關(guān)鍵的零件如軸承采用瑞典SKF 自動(dòng)調(diào)心滾子軸承; 氣動(dòng)元件采用日本SMC 公司的元件; 磨輥、碟形彈簧、標(biāo)準(zhǔn)件等采用國內(nèi)最好廠家的產(chǎn)品。 4. 結(jié)束語 綜上所述, 我們推出的MME 新型磨粉機(jī), 具有外觀布局更合乎人機(jī)工程學(xué)原理, 鑄鐵底座綜合性能更優(yōu)良, 承受研磨應(yīng)力的獨(dú)立單元結(jié)構(gòu)更先進(jìn), 調(diào)節(jié)軋距更省力方便, 先進(jìn)的齒楔帶、自動(dòng)補(bǔ)償?shù)膹椥詮埦o裝置,易調(diào)整的刮刀清理結(jié)構(gòu), 國際領(lǐng)先的控制系統(tǒng)等突出的優(yōu)點(diǎn)。同時(shí), 該機(jī)在用戶的需求下也可安裝氣控伺服喂料系統(tǒng)。總之, MME 新型磨粉機(jī)被專家認(rèn)為是當(dāng)今國際領(lǐng)先、國內(nèi)一流 的磨粉機(jī)。 MME new milling machine design Author: Patton WJ Translator: 程本 【Abstract】: MME on the characteristics of a new milling machine, such as the appearance of the layout, cast iron base, since the mill for grinding roll group, and elastic tension Structure, frequency feeding system, scraper, such as cleaning up a brief description and analysis. 【Key words】: Mill; Roll; frequency feeding system 1. MME-milling machine introduced MME Mill Food Machinery Factory is the 2005 launch of a new model, The aircraft is in MDDK Mill for nearly 10 years on the basis of the practice, absorbing the advanced experience at home and abroad, the development of a new milling machine, a milling machine MDDK have the following characteristics: 1） appearance in line with ergonomic, an external door opened, the work of the inspection, to facilitate the replacement of components, and effort. Cast iron base of integrated high-performance 2） observe the tube into a cone-shaped oval. Oval tube observed not only beautiful shape, and no dead ends, the expected improvement of the conditions and difficult to stick materials. 3） rolling from the adjustment effort, easily. Regulating different principle, to change the force, under the boot, easy to adjust to the ideal state. 4） rolling bodies from the air conditioning locking. Milling machine at home and abroad for almost all the mechanical locking, MME Mill for the realization of pneumatic locking, easy to operate, the absolute lock. 5） the unique flexibility with automatic compensation tooth wedge tensioning device. The device can automatically trace the length of compensation with improved with the changes in life. 6） Blade automatic clearance from agencies. When Mill from the rolling mill roll, and Roller Blade automatic separation, eliminate scraper and roller mill in the absence of direct friction material circumstances, the protection of Roller, raising scraper life. 7） simple feed roller clean-up unit. Feeding roll relocation can not be very easy to clean up after fouling feed roller, clean-up activities unit, milling machines to improve the health status and reduce the assembly and maintenance difficult. 2. A unique form factor 1) Mill appearance As shown in Figure 1, the body height of the milling machine, grinding roll centre height and fine-tuning hand wheel center height, the housings of height, the body radius of the transition, Housing radius and the overall shape of the distribution, and other technical parameters were by Image Design Conducted; aircraft designs of national patents, patent No. ZL 01 3 4997216. 2) The entrance of materials The entrance of materials into the cone-shaped oval for the use of quality plexiglass plate overall molding, not only aesthetic appearance, for observation, but also better able to make materials distributed evenly gravity feed to the full-length on the roll. 3) rotating shielding Mill use of revolving door on both sides of shielding structure, simply reverse handle to open and close automatically after rely on magnetic absorption in the body, do not need any tool to achieve rapid switch shielding, operating flexibility, protection Better. 4) cast iron base The aircraft used cast iron base, compared with the base plate, a solid structure, deformation, damping and noise suppression, and other advantages of using the body from top to bottom mesh structure, the upper side of a high-quality steel frame welded together, from top to bottom part with a spring-connected , Damping the middle pad with two in terms of function, life, beauty, operation and maintenance, and other aspects of the design has been optimized, integrated with superior performance. 3. Mill structural design 1) Roller Group 1.1 Roller grinding of the group self-supporting structure Roller alone to bear the stress group structure is simple, sensitive operations. Express roller bearing fixed at 6 support beams 13, the slow roller bearing 8 to ride in support of cross-beams, and the round of 12 with eccentric, the 14-cylinder piston rod to turn out and the retractable arm 15 rotating, Eccentric round of rotation, so that at a relatively slow roller bearings fast-moving roller center, complete roll grinding moves from the reclosure, shown in Figure 2. 1.2 from the rough-rolling Rough-nut adjustment 5, 7 driven by drawbars preloading disc spring Group 10, Block 8 slow roller bearings around the eccentric round of 12 rotating, so that relatively slow roller center before and after moving faster roll center, rolling from the get adjusted. 1.3 fine-tuning before rolling Moment of fine-tuning a hand wheel, fine-tuning screw driven by three fine-tuning lever fulcrum around 4 rotation, driven by mobile cylinder, to arm 15 rotating, driven eccentric round, moving at slow roller bearings so that the slow roll center and a center roll faster relative position Changes. As more leverage, rolling from the adjustment accurate, more effort. 2) Roll of transmission 2.1 Three of the transmission structure MME New Mill between the use of the roll of three transmission structure, a rational layout, compact and optional power transmission belt tooth wedge. The tooth wedge With a axial targeting, in no deviation in the transfer process, not jump teeth. The tooth with a wedge of the excellent performance of new materials, high tensile strength of use, extension of the import of small glass fibers and rope, into an integrated body of the excellent performance of the chloroprene rubber, wedge tooth surface covered with nylon fabric with low Friction and high wear resistance, the tooth wedge milling machine with rollers is the best choice of transmission. 2.2 Take-up round The take-up round for the round of wedge in the processing and assembly process is very difficult, especially when the assembly is quick roll round and round the axis of tension must be parallel, related to the three pulley axial positioning must ensure that each wedge with tooth root Perpendicular to the axle in the respective sports plane of the movement, if one occurred axial displacement, it is bound to cause tooth wedge zone and on the alveolar round departure from the engagement occurred, the teeth are Shouli Bu wedge, wedge tooth wear faster, leading to The whole of rubbing with teeth, broken teeth resulting in the fracture. Now take-up round-round to improve design, reduce wedge round of the difficulty of processing and improve the accuracy of processing, when the pulley assembly in a smaller displacement, with the teeth wedge wedge teeth no longer subject to the restrictions of tension round alveolar , Thus reducing tooth wedge with the wear and improve the Tooth wedge with life. 2.3 flexible tension structure (see Figure 3) Tension over the past rigid structure for structural adjustment, with teeth in the wedge in the course of transmission, gear wedge with a trace changes in the length of time, we must adjust the location of tension round, otherwise will affect the teeth wedge with life. Tension is flexible structure can be used automatic compensation, the length of the tooth wedge with no trace changes at any time take-up round of the location. I plant through repeated practice contrast to prove that the flexibility to switch to take-up structure, with teeth wedge to extend the life span of three to five times. 3) Feeding System Mill confidential remained stable, high-yield, efficient operation, the feeding system should be on a certain flow of materials to a uniform rate of accurate feeding ground area. Feeding results have a direct impact on the grinding effects and the level of extraction rate. At the same time, feed for uniformity, to reduce the wear and tear roll grinding, grinding to extend the life of roller bearings and also have an important Italian Justice. 3.1 Feeding the simple and effective institutions to ensure that Feeding the uniformity of the feed in order to achieve the best results, the feed roll and roll grinding relationship between the location of a reasonable position. Feeding activities of the special baffle institutions, and feed into the roll between Liaotong have sufficient freedom of the scattered point of view and space; In addition, feed the door open flexible, roll-feed the profile of users based on location and to The different materials in the trapezoidal teeth, tooth thread, rectangular teeth, teeth-cutter and optical axis To choose between convenience. 3.2 Frequency feeding system In order to ensure the stability of feed, using the most advanced frequency-feed system, and the basic procedures are: Mill at the level expected by Level sensors detect, through the interface board of A / D converter input PLC controller , Controller accordance with the expected signal input and output to an analog signal converter from the inverter control feed motor speed, accurate control of the Mill Level. Feeding roller motor speed in the 40 ~ 260 r / min within the scope of materials based on the level of automatic CVT, from top to bottom-feed roller by the timing belt on a certain ratio transmission, make the mill to maintain the basic stability of materials , Flour quality has been guaranteed. 3.3 a simple, convenient and clean-up activities of the health unit Silo in the clean-up, we did not mechanically copy the foreign Mill, the feed roll out as a whole, the increase in parts of practice, but from the production reality, in the centre between the beams and feed roller Increase activity boards, agencies to facilitate a simple cleaning up the same effect, it is easy to clean up after the feed roller fouling, thereby improving the health standards, but also reduce the assembly and maintenance more difficult. 3.4 increase vacuum suction device wind feeding conditions improve, enhance grinding effects In the bottom and feed roller Grinding area on the design of a special Suction Road, which winds vacuum suction device. The device can reduce the material to the mill roll in both directions due to the two rotating the "pump gas" phenomenon, and lower the mill bore the temperature and humidity, the heart grinding, grinding residue can increase traffic, dusting, polishing and improving results . At the same time, the grinding of glass doors kept clean, transparent, can be well observed feeding room conditions. 4) Scraper cleaning Roll Advanced milling machines are used scraper cleaning-roller, scraper brushes clean up more than clean health. I plant clean-up institutions designed scraper assembly simple, easy adjustment, reducing power consumption by 30 percent, is now in the majority of mills home use, users reflect the results are much better than the brush. 5) Electronic Control System The control system components, display panels, modules, PLC imports of electrical appliances are selected, the entire programming control system design more scientific, more accurate and complete, stronger anti-interference capability. Single milling machine installed in the control box in front of the body, multiple Mill electrical components can also be installed in focus away from the milling machine inside the control cabinet, the implementation of the respective control, away from the dust sources, protection of electrical components And enhance quality control, easy to install maintenance. 6) Quality assurance In order to ensure the overall quality of milling machine, I plant on the aircraft parts and precision processing technology to do high-tech requirements. In processing, assembly, inspection, and other areas are strictly according to quality standards. In order to ensure the overall performance, the key components such as the use of the Swedish SKF Bearing automatically aligning roller bearings, aerodynamic components used Japanese SMC company's components; Roll, disc spring, using standard parts, and other domestic manufacturers of the best products. ? 4. Conclusion To sum up, we launch the new MME milling machine, with exterior layout will be more ergonomic, cast iron base of comprehensive performance better, grinding bear the stress of an independent unit structure is more advanced, rolling from the adjustment effort to facilitate more advanced The tooth wedge zone, automatic compensation of flexibility tensioning device, easy to clean up structural adjustment of the scraper, a leading international control system, and highlights the advantages. At the same time, the aircraft on the user's needs can also be installed under the servo-controlled feeding system. In short, MME New Mill were experts believe is the leading international and domestic first-class The milling machine.