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1、西南交通大學(xué)碩士學(xué)位論文液壓系統(tǒng)變工況能量回收技術(shù)研究姓名:趙俊申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):驅(qū)動(dòng)技術(shù)與智能系統(tǒng)指導(dǎo)教師:鄧斌20070401西南交通大學(xué)碩士研究生學(xué)位論文第
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3、頁(yè)AbstractHydraulicpumpsandhydraulicmotorsareenergyconversiondevices.Hy—draulicpumpconvertsmechanicalenergyintotheoriginalmotivefluidpressureenergy,whichisthedrivingforceofhydrau
4、licsystemcomponents;hydraulicmotoristransformedintomechanicalenergy,whichistheimplementationofhy—drauliesystemcomponents.Researchinganddevelopinghydraulicpumpsandmotorsmustconductexperimentsforlife,whatkindofeconomicsystemismorereasonable,itisworthdiscussing.Espe
5、ciallythehigh-power&low-speed&high—torquehydraulicmotorandhydraulicpumpexperimentalmethoddeservesmorestudying.Generally,thehydraulicsystemconsumesmorethan60%oftheinputpowerintoheat,anditalsorequiresthecoolingsystemforcoolingequipment.Sothefundamentalsolvefurthese
6、problemsisenergyrecovery.Currently,theresearchresultsbyenergyrecoveryareplentiful,butmostareconcentratedinthestudyoftheworkingconditionsrated.Andresearchonchangeworkingconditionsarefewer.Inthispaper,changedconditionsforthepowerrecoverytechnologyonthebasisofratedc
7、onditionspowerrecovery.Matlabsimulationsoftwareusedtosimulatethesystem,thenthesystemanalysisofthesimulationresults,knowtheadvantagesanddisadvantagesofthesystemresponse,betterimproveenergyrecoverysystemdesign.Changeofpowerrecoverysystemsimulationconditions,thereco
8、veryofpowersystemdesignreference.Finalizetheselectionofthecomponentsofhydraulicenergyexperiment,andformationofmulti—experimentlinkingthefactorybeforethehydraulicpumpperformancetest..KeyWords:Variablepump(motor);PowerRecovery:simulation;Response;PIDalgorithm西南交通大學(xué)
9、碩士研究生學(xué)位論文第1頁(yè)第1章緒論液壓系統(tǒng)具有傳動(dòng)平穩(wěn)、控制簡(jiǎn)單、體積較小等優(yōu)點(diǎn),但液壓系統(tǒng)傳動(dòng)效率低,存在著能源浪費(fèi)。特別是我國(guó)日益突出的電力緊張問(wèn)題,導(dǎo)致電價(jià)大幅度上漲,所以在液壓系統(tǒng)中應(yīng)當(dāng)充分重視節(jié)能技術(shù)。在液壓系統(tǒng)的設(shè)計(jì)中,不但要實(shí)現(xiàn)其拖動(dòng)與調(diào)節(jié)功能,還要盡可能地利用能量,達(dá)到高效、可靠運(yùn)行的目的。液壓系統(tǒng)的功率損失會(huì)使系統(tǒng)的總效率下降、泊溫升高、油液變質(zhì),導(dǎo)致液壓設(shè)備發(fā)生故障。因此,設(shè)計(jì)液壓系統(tǒng)時(shí)必須多途徑地考慮降低系統(tǒng)的功率損失。1.1液壓系統(tǒng)能量損失的主要原因液壓系統(tǒng)要進(jìn)行兩次能量轉(zhuǎn)換,即由電機(jī)和泵把電能轉(zhuǎn)
10、化為液壓能,再通過(guò)液壓執(zhí)行元件把液壓能轉(zhuǎn)化為機(jī)械能,能量損失較大,所以效率較低。液壓系統(tǒng)的能量損失全部以熱能的形式釋放。(1)泵和馬達(dá)的發(fā)熱:在液壓傳動(dòng)當(dāng)中,旋轉(zhuǎn)式流體元件都在低于效率百分之百的情況下運(yùn)轉(zhuǎn),這就意味著輸入到系統(tǒng)的能量比輸出的能量多,其損失的能量主要為泵和馬達(dá)的內(nèi)部磨損形成溫升轉(zhuǎn)化成熱能。(2)節(jié)流引起