磁流變液動(dòng)壓軸承設(shè)計(jì)說(shuō)明書(shū)[帶圖紙].doc

重慶理工大學(xué)畢業(yè)論文磁流變液動(dòng)壓軸承設(shè)計(jì)目錄摘要..............................................................IAbstract...........................................................II1磁流變液動(dòng)壓軸承介紹..............................................11.1磁流變液的介紹.............................................11.1.1磁流變液定義]1[....................................................................................11.1.2磁流變液的制備....................................................................................11.1.3磁流變液應(yīng)用范圍.................................................................................21.1.4磁流變液應(yīng)滿足的指標(biāo)：....................................................................31.1.5磁流變液發(fā)展其前景............................................................................31.2滑動(dòng)軸承簡(jiǎn)介................................................41.3磁流變液動(dòng)壓軸承............................................52方案設(shè)計(jì)以及選取..................................................52.1滑動(dòng)軸承的分類..............................................52.2滑動(dòng)軸承的選取.............................................72.3電磁場(chǎng)的添加................................................92.4密封方式選擇...............................................112.5軸承座選取以及建模.........................................122.5.1軸承座上端..........................................................................................132.5.2軸承座下端..........................................................................................142.5.3軸瓦......................................................................................................142.5.4軸承裝配圖..........................................................................................153.1滑動(dòng)軸承的處電磁引入.......................................163.2磁流變液的添加.............................................173.3磁流變液動(dòng)壓軸承原理.......................................193.3.1磁流變液添加以及電線接入..............................................................193.3.2磁流變液裝載位置..............................................................................193.3.3磁流變液的密封..................................................................................204主要尺寸以及主要計(jì)算.............................................214.1軸承座的具體尺寸...........................................214.1.1軸承座上端..........................................................................................214.1.2軸承座下端..........................................................................................224.1.3軸瓦......................................................................................................244.2滑動(dòng)軸承所涉及的主要計(jì)算.................................................................................244.2.1電磁場(chǎng)的計(jì)算......................................................................................244.2.2磁流變液粘度的計(jì)算..........................................................................254.2.3磁流變液油膜承載能力計(jì)算..............................................................255SolidWorks仿真分析..........................................................................................................265.1爆炸視圖...................................................265.2仿真運(yùn)動(dòng)...................................................28重慶理工大學(xué)畢業(yè)論文磁流變液動(dòng)壓軸承設(shè)計(jì)6總結(jié).............................................................30致謝...............................................................31參考文獻(xiàn)...........................................................32文獻(xiàn)綜述............................................錯(cuò)誤!未定義書(shū)簽。重慶理工大學(xué)畢業(yè)論文磁流變液動(dòng)壓軸承設(shè)計(jì)I摘要磁流變液是可磁極化的固體微顆粒在基液中形成的懸浮液，其流變特性可由外加磁場(chǎng)連續(xù)控制。當(dāng)不加磁場(chǎng)時(shí)，磁流變液表現(xiàn)出類似牛頓流體的行為；當(dāng)外加磁場(chǎng)時(shí)，磁流變液中的磁性顆粒沿磁場(chǎng)方向排成鏈狀，這些鏈狀結(jié)構(gòu)阻止了液體的流動(dòng)，因而改變了磁流變液的流變特性，其流動(dòng)表現(xiàn)出Bingham塑性體行為，具有粘性和塑性特性。隨著磁流變液在機(jī)械應(yīng)用中的不斷發(fā)展，越來(lái)越多的將磁流變液運(yùn)用于各種機(jī)械器件中。磁流變液在外加磁場(chǎng)增強(qiáng)的過(guò)程中，液體的粘度隨之增大并最終失去流動(dòng)性變?yōu)楣虘B(tài)，此過(guò)程耗能小、可逆、能產(chǎn)生較大屈服應(yīng)力且在豪秒級(jí)內(nèi)完成。利用此一系列性能，在充分考慮磁場(chǎng)、溫度、顆粒尺寸、壁面效應(yīng)和體積濃度等諸因素對(duì)應(yīng)用器件影響的基礎(chǔ)上，可開(kāi)發(fā)各種磁流變阻尼器件。由于磁流變液相變的過(guò)程在毫秒量級(jí)內(nèi)完成，因此可以做成敏捷度極高的控制元件，用于聯(lián)接和傳遞兩部件之間的力或力矩。如汽車用離合器、制動(dòng)器等。磁流變液動(dòng)壓軸承也是基于這個(gè)原理設(shè)計(jì)的。關(guān)鍵詞：磁流變液動(dòng)壓軸承設(shè)計(jì)重慶理工大學(xué)畢業(yè)論文磁流變液動(dòng)壓軸承設(shè)計(jì)IIAbstractMagnetorheologicalfluidisamagneticpoleofthesolidparticlesinsuspension,formedinthebaseofitsrheologicalpropertiescanbemadeofcontinuouscontrolplusamagneticfield.Whenwithoutmagneticfield,themagneticrheologicalfluidshowedsimilarbehaviorofNewtonianfluid；Whenappliedmagneticfield,themagneticparticlesofmagnetorheologicalfluidalongthemagneticfielddirectioninchain,thechainstructuretopreventtheflowoftheliquid,andthuschangetherheologicalpropertiesofMRF,theflowshowtheBinghamplasticbodybehavior,viscousandplasticcharacteristics.AstheMRFinmechanicalapplicationsdevelopment,moreandmoreapplicationofMRFtovariouskindsofmechanicaldevice.Magnetorheologicalfluidintheprocessofplusenhancedmagneticfield,theliquidviscosityincreaseandeventuallyloseliquidintoasolid,theprocessenergyconsumptionofsmall,reversible,canproducealargeyieldstressandinhousefinishinsecondgrade.Usingthisseriesofperformance,infullconsiderationmagneticfield,temperature,particlesize,surfaceeffectandvolumeconcentration,etc.Variousfactorsinfluence,onthebasisoftheapplicationcomponentscandevelopallkindsofmagnetorheologicaldampingdevices.Duetomagneticrheologicalliquidphasechangeisaccomplishedwithinmillisecondlevel,soyoucanmakeithighagilitycontrolelement,isusedtojoinandtransferforceormomentbetweenthetwoparts.Suchasautomotiveclutch,brake,etc.Magnetorheologicalfluiddynamicpressurebearingisdesignedbasedonthisprinciple.Keywords:magnetorheologicalfluiddynamicpressurebearingdesign重慶理工大學(xué)畢業(yè)論文磁流變液動(dòng)壓軸承設(shè)計(jì)11磁流變液動(dòng)壓軸承介紹1.1磁流變液的介紹1.1.1磁流變液定義]1[磁流變液（MagnetorheologicalFluid,簡(jiǎn)稱MR流體）屬可控流體，是智能材料中研究較為多的一種材料。磁流變液一般由鐵磁性易磁化顆粒、母液油和穩(wěn)定劑三種物質(zhì)構(gòu)成。磁流變液是由高磁導(dǎo)率、低磁滯性的微小軟磁性顆粒和非導(dǎo)磁性液體混合而成的懸浮體。這種懸浮體在零磁場(chǎng)條件下呈現(xiàn)出低粘度的牛頓流體特性；而在強(qiáng)磁場(chǎng)作用下，則呈現(xiàn)出高粘度、低流動(dòng)性的Binghan體特性。由于磁流變液在磁場(chǎng)作用下的流變是瞬間的、可逆的、而且其流變后的剪切屈服強(qiáng)度與磁場(chǎng)強(qiáng)度具有穩(wěn)定的對(duì)應(yīng)關(guān)系，因此是一種用途廣泛、性能優(yōu)良的智能材料。1.1.2磁流變液的制備磁流變液一般由鐵磁性易磁化顆粒、母液油和穩(wěn)定劑三種物質(zhì)構(gòu)成。鐵磁性（軟磁性）固體顆粒有球狀、棒狀和紡錘狀三種形態(tài)，密度為7～8g/cm3，其中球形顆粒的直徑在0.1～500μm范圍內(nèi)。目前可用作磁流變液的鐵磁性固體顆粒是具有較高磁化飽和強(qiáng)度的羰基鐵粉、純鐵粉或鐵合金。由于羰基鐵粉飽和磁化強(qiáng)度為2.15特斯拉，且物性較軟、具有可壓縮性、材料成本低、購(gòu)買(mǎi)方便，已成為最常用的材料之一。磁流變液的母液油（分散劑）一般是非導(dǎo)磁且性能良好的油，如礦物油、硅油、合成油等,它們須具有較低的零場(chǎng)粘度、較大范圍的溫度穩(wěn)定性、不污染環(huán)境等特性。穩(wěn)定劑用來(lái)減緩或防止磁性顆粒沉降的產(chǎn)生。因?yàn)榇判灶w粒的比重較大，容易沉淀或離心分離，加入少量的穩(wěn)定劑是必須的。磁流變液的穩(wěn)定性主要受兩種因素的影響：一是粒子的聚集結(jié)塊，即粒子相互聚集形成很大的團(tuán)；二是粒子本身的沉降，即磁性粒子隨時(shí)間的沉淀。這兩種因素都可以通過(guò)添加劑或表面活性劑來(lái)減緩。由超精細(xì)石英粉形成的硅膠是一種典型