齒輪泵的結(jié)構(gòu)改進設(shè)計說明書[帶圖紙].doc

編號無錫太湖學(xué)院畢業(yè)設(shè)計（論文）題目：齒輪泵的結(jié)構(gòu)改進設(shè)計信機系機械工程及自動化專業(yè)學(xué)號：學(xué)生姓名：指導(dǎo)教師：（職稱：副教授）（職稱：）2013年5月25日無錫太湖學(xué)院本科畢業(yè)設(shè)計（論文）誠信承諾書本人鄭重聲明：所呈交的畢業(yè)設(shè)計（論文）齒輪泵的結(jié)構(gòu)改進設(shè)計是本人在導(dǎo)師的指導(dǎo)下獨立進行研究所取得的成果，其內(nèi)容除了在畢業(yè)設(shè)計（論文）中特別加以標(biāo)注引用，表示致謝的內(nèi)容外，本畢業(yè)設(shè)計（論文）不包含任何其他個人、集體已發(fā)表或撰寫的成果作品。班級：機械97學(xué)號：0923807作者姓名：2013年5月25日I摘要齒輪泵是液壓系統(tǒng)中最重要的動力源,在液壓傳動系統(tǒng)中應(yīng)用廣泛,因此,吸引了大量學(xué)者對其進行研究,其主要部件是內(nèi)部相互嚙合的一對齒輪?，F(xiàn)代機械工程對齒輪泵提出很多新要求，如壓強高、排量大、脈動低、噪音低等，所以對齒輪泵的性能分析與改進成為了很重要的課題。本課題以齒輪泵為研究對象，總結(jié)了齒輪泵的特點，深入研究了齒輪泵整體結(jié)構(gòu)及其原理，并利用UG三維建模軟件對其進行實體建模，對齒輪泵的流量特征、徑向嚙合力進行理論分析和數(shù)值計算，為齒輪泵的設(shè)計提供必要的理論依據(jù)。研究了多種齒輪泵的齒廓類型，并推導(dǎo)出這些齒廓線方程。最后學(xué)習(xí)了流體動力學(xué)相關(guān)的基礎(chǔ)理論知識，利用CFD前處理軟件Gambit和后處理軟件Fluent對以上五種齒廓齒輪泵進行流體分析，并比較不同齒廓分析后的結(jié)果，分別計算了齒輪泵齒間區(qū)的流量、齒輪嚙合區(qū)域的流量，最后就得到了齒輪泵的流量。在時間和轉(zhuǎn)速確定的情況下，得到齒輪泵的流速。外嚙合齒輪泵的結(jié)構(gòu)對其內(nèi)部的流場有很大的影響，采用fluent有限元法求解計算模型，就不同齒廓的變化特點進行對比，可以得出每種類型齒廓的相應(yīng)的優(yōu)缺點，從而得出最優(yōu)的分析結(jié)果并在此基礎(chǔ)上改進設(shè)計出新的齒廓線。本文對齒輪泵的輸出特性研究，推到出齒廓線方程，最后結(jié)合流體動力學(xué)理論，運用CFD前處理軟件Gambit和后處理軟件Fluent對以上五種不同的齒廓齒輪泵進行流體分析，在相同的轉(zhuǎn)速下，比較不同齒廓的分析結(jié)果，漸開線齒廓在齒輪泵中的增壓效果最好，并提出一些優(yōu)化方案。關(guān)鍵詞：齒輪泵；齒廓；有限元法；輸出特性；流體分析`IIAbstractGearpumpisthemostimportantsourceofpowerinthehydraulicsystem,widelyusedinthehydraulicdrivesystem,therefore,attractedalargenumberofscholarsstudy,anditsmaincomponentsareapairofgearsmeshingwitheachotherbytheinternal。Modernmechanicalengineeringhavemadealotofnewrequirementstogearpump,suchashighpressure,largedisplacement,lowrippleandlownoise,PerformanceAnalysisandImprovementofthegearpumphasbecomeaveryimportantissue.Thetopicstogearpumpforthestudy,summedupthecharacteristicsofthegearpump,in-depthstudyoftheoverallstructureandprincipleofthegearpumpandUGthree-dimensionalmodelingsoftware,solidmodeling,theflowcharacteristicsofthegearpump,theoreticalanalysisandnumericalcalculationoftheradialdirectionmeshingforceofradialdirection,toprovidethenecessarytheoreticalbasisforthedesignofgearpump.Avarietyofthetypetoothprofileofthegearpumpandderivetheequationsofthesetoothprofile.Finallylearnthebasictheoreticalknowledgeoffluiddynamics,toCFDpre-processingsoftwareGambitandpost-processingsoftwareFluentformorethanfivetoothprofilegearpumpfluidanalysis,andcomparisonresultsofdifferenttoothprofileanalysiswerecalculatedflowrateoftheareaoftheinterdental,gearmeshingareaofflowofthegearpumpthe,andfinallygottheflowofthegearpump.Inthecaseoftimeandspeeddeterminedtoobtainflowrateofthegearpump.Structureoftheexternalgearpumphasagreatinfluenceonitsinternalflowfield,usingthefluentfiniteelementmethodforsolvingthecalculationmodel,comparisonofthechangesinthecharacteristicsofthedifferenttoothprofilecanbedrawnfromthecorrespondingadvantagesanddisadvantagesofeachtypeoftoothprofiletoarriveatthebestresultsoftheanalysistoimprovethedesignofanewtoothprofileonthisbasis.Theoutputcharacteristicsofthegearpumpontothetoothprofileequationandfinallythetheoryoffluiddynamics,theuseofpre-processingofsoftwareCFDGambitandpost-processingsoftwareFluentfluidanalysismorethanfivedifferenttoothprofileofthegearpumpinthesamespeed,differenttoothprofileanalysisresultofthatthebestofboostereffectisinvolutelinetoothprofileofthegearpump,andputforwardsomeoptimizationprogramofit.Keywords:gearpump；toothprofile；finiteelementmethod；outputcharacteristics；fluidanalysisIII目錄摘要........................................................................................................................................IAbstract..................................................................................................................................II目錄.......................................................................................................................................III1緒論.....................................................................................................................................11.1齒輪泵的研究內(nèi)容及意義.......................................................................................11.2齒輪泵國內(nèi)外的發(fā)展概況.......................................................................................11.3本課題應(yīng)達到的要求...............................................................................................32齒輪泵的工作原理及三維建模.........................................................................................42.1外嚙合液壓齒輪泵的工作原理...............................................................................42.2齒輪泵分類、用途、應(yīng)用范圍...............................................................................42.2.1齒輪泵的分類.................................................................................................42.2.2齒輪泵的用途及應(yīng)用范圍.............................................................................52.3齒輪泵的三維建模...................................................................................................53齒輪泵的流量特性.............................................................................................................83.1齒輪泵流量的研究...................................................................................................83.1.1齒輪泵平均流量...........................................................................................103.1.2齒輪泵瞬態(tài)流量...........................................................................................103.2齒輪泵排量的研究.................................................................................................113.2.1根據(jù)齒槽有效容積的排量計算方法...........................................................113.2.2根據(jù)輪齒有效體積的排量計算方法...........................................................123.3本章小結(jié).................................................................................................................134流體動力學(xué)理論知識研究...............................................................................................144.1流體力學(xué)簡介.........................................................................................................144.2流體動力學(xué)的基本思想.........................................................................................144.3計算流體動力學(xué)的特點.........................................................................................154.4計算流體力學(xué)的基本步驟.....................................................................................154.5流體力學(xué)基本方程.................................................................................................174.6流體流動模型的確定.............................................................................................194.7一般結(jié)構(gòu).................................................................................................................194.7.1前處理...........................................................................................................194.7.2求解器...........................................................................................................194.7.3后處理...........................................................................................................194.8本章小結(jié).................................................................................................................195齒輪泵不同齒廓的流體動力學(xué)分析...............................................................................205.1Fluent簡介...............................................................................................................205.2齒輪泵的流體力學(xué)分析.........................................................................................20