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1、河北工業(yè)大學(xué)畢業(yè)設(shè)計(jì)說明書(論文)作者:李銀寶學(xué)號:110316學(xué)院:機(jī)械學(xué)院系(專業(yè)):車輛工程題目:微型轉(zhuǎn)子發(fā)動(dòng)機(jī)結(jié)構(gòu)方案設(shè)計(jì)與分析指導(dǎo)者:石維佳教授評閱者:年月日微型轉(zhuǎn)子發(fā)動(dòng)機(jī)結(jié)構(gòu)方案設(shè)計(jì)與分析摘要微小型機(jī)電系統(tǒng)概念的提出為微型動(dòng)力系統(tǒng)的發(fā)展奠定了良好基礎(chǔ),體積微小、儲能較高、功率輸出范圍寬且性能穩(wěn)定的特點(diǎn),使微小型動(dòng)力機(jī)械具有良好的發(fā)展前景及應(yīng)用市場,但目前該領(lǐng)域的發(fā)展還不成熟?;诖?,本文提出一種微小型隔離扇柔性轉(zhuǎn)子發(fā)動(dòng)機(jī),其中隔離扇-轉(zhuǎn)子的柔性特點(diǎn)使其具有諸多獨(dú)特優(yōu)勢。本文針對其性能和結(jié)構(gòu)動(dòng)
2、力學(xué)特性展開研究工作,具體研究內(nèi)容如下:1.依據(jù)發(fā)動(dòng)機(jī)工作原理對整機(jī)結(jié)構(gòu)和各子系統(tǒng)進(jìn)行設(shè)計(jì),建立了工作過程的熱力學(xué)模型、燃燒過程的三維數(shù)值模擬,校核了放熱模型。以上述模型計(jì)算燃燒室的性能指標(biāo),討論了對燃燒室性能有影響的諸多因素,明確了具體的影響規(guī)律。結(jié)果表明,燃燒室排量為,設(shè)計(jì)轉(zhuǎn)速下燃燒室的指示熱效率為,考慮全部損失時(shí)發(fā)動(dòng)機(jī)整機(jī)的最大輸出功率為,有效效率為。2.燃燒室流動(dòng)和燃燒過程的三維數(shù)值模擬。通過對燃燒過程的數(shù)值模擬計(jì)算分析了燃燒室氣流流動(dòng)和燃燒性能。此基礎(chǔ)上,又展開了對燃燒室尺寸和工作條件對其性能
3、影響規(guī)律的研究。3.針對發(fā)動(dòng)機(jī)工作過程中隔離扇-轉(zhuǎn)子剛-柔耦合特性以及隔離扇的幾何非線性彈性變形,為考察隔離扇的動(dòng)態(tài)結(jié)構(gòu)強(qiáng)度和發(fā)動(dòng)機(jī)動(dòng)力學(xué)特性,建立了大范圍轉(zhuǎn)動(dòng)的隔離扇-轉(zhuǎn)子剛-柔耦合非線性動(dòng)力學(xué)理論模型,為準(zhǔn)確計(jì)算其動(dòng)力學(xué)特性奠定基礎(chǔ)。關(guān)鍵詞:隔離扇柔性轉(zhuǎn)子發(fā)動(dòng)機(jī)燃燒室性能幾何非線性數(shù)值模擬微小型機(jī)械DesignofMicro-powerEngine’sStructureanditsAnalysesAbstract:Theproposaloftheconceptofmicroelectro-mecha
4、nicalsystempromotesthedevelopmentofmicro-powersystem,whosesmallersize,higherenergystorageandawiderrangeofpoweroutputandapplyingstable,whichmakesitawiderangeofapplicationmarketandbrightprospectsforitsdevelopment.Whilenowthisfieldisnotmature.Basedonthisbac
5、kground,thisarticlepresentsamicroisolated-wingflexiblerotaryengine,whoseflexiblecharacteristicsmakeitauniqueadvantage.Basedontheconceptprototypeandtounderstanditsperformanceandstructuraldynamics,themaincontentsofthisarticleareasbelow:1.Accordingtotheprin
6、cipleoftheengine,thewholestructureandsub-systemsweredesigned,andthermodynamicmodeloftheengine,combustionheatreleasemodelrevisedbasedonthethree-dimensionalnumericalsimulationprocesswasestablishedinthearticle.Onthisbasis,thearticlecalculatedthecombustionpe
7、rformanceanddiscussedtheinfluenceofthecombustionperformancefactorsandpointedouttherulesofitsimpactonperformance.Theresultsshowthatthedisplacementofcombustionchamberoftheengineis,andtheindicatedthermalefficiencyunderthedesignspeedconditionsisandtakinginto
8、accountthemechanicallosstheenginemaximumoutputpowerreachesandtheeffectiveefficiencyis.2.Thisarticlebuiltcombustionheatreleasemodelrevisedbasedonthechamberfuelgasflowprocessandthethree-dimensionalnumericalsimulationprocess.