資源描述：
《油液含氣量對(duì)液壓機(jī)械換段性能的影響》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、學(xué)兔兔www.xuetutu.com第51卷第14期機(jī)械工程學(xué)報(bào)V01．51NO．142015年7月JOURNALOFMECHANICALENGINEERINGJu1．2015DoI：l0．3901／JME．2015．14．122油液含氣量對(duì)液壓機(jī)械換段性能的影響水楊樹軍焦曉娟鮑永王文鋒丁健(燕山大學(xué)車輛與能源學(xué)院秦皇島066004)摘要：研究油液含氣量對(duì)液壓機(jī)械無級(jí)傳動(dòng)換段過程中動(dòng)態(tài)性能的影響規(guī)律。開展油液體積模量的理論分析，進(jìn)行油液不同含氣量時(shí)體積模量的試驗(yàn)研究，將理論曲線與試驗(yàn)曲線進(jìn)行比較，結(jié)果表明，油液正割體積模量理論值和試驗(yàn)值基本一致，其數(shù)學(xué)模型可用于液
2、壓機(jī)械閉式液壓回路換段過程仿真分析。采用將液壓機(jī)械閉式液壓回路等效為雙作用液壓缸系統(tǒng)的方法，建立液壓機(jī)械無級(jí)傳動(dòng)閉式液壓回路換段過程數(shù)學(xué)模型，并在Mattab／Simulink中進(jìn)行仿真分析。結(jié)果表明，油液含氣量越大，體積模量越小，換段時(shí)定排量液壓元件轉(zhuǎn)速波動(dòng)越大，換段品質(zhì)降低；控制變排量液壓元件排量變化和延長負(fù)載反向時(shí)間，可以有效減小換段中液壓回路壓力和定排量液壓元件轉(zhuǎn)速波動(dòng)。關(guān)鍵詞：油液含氣量；體積模量；液壓機(jī)械；復(fù)合無級(jí)傳動(dòng)中圖分類號(hào)：U463FluidAirContentAffectingthePowerShiftPerformanceoftheHydro
3、-mechanicalVariableTransmissionYANGShujunJIAOXiaojuanBAOYongWANGWenfengDINGJian(CollegeofVehicleandEnergy,YanshanUniversity,Qinhuangdao066004)Abstract：Theinfluencerulesaboutfluidaircontentafectingdynamicbehaviorofthehydro—mechanicalvariabletransmissionduringpowershiftiSresearched．Thet
4、heoreticalanalysisaboutoilbulkmodulusiscarriedout．a(chǎn)ndtheexperimentalresearchofoilbulkmoduluswithdiferentaircontentiSdone．Thetheoreticalcurvesofthefluidsecantbulkmodulusareinaccordwiththeexperimentalresults．whichshowsitsmathematicalmodelcanbeusedinpowershiftsimulationanalysisofthehydro
5、．mechanicalvariabletransmissionclosedhydrauliccircuit．Thepowershiftmathematicalmodeloftheclosedhydrauliccircuitinhydro．mechanicalvariabletransmissionisbuiItwiththemethodthattheclosedhydrauliccircuitisequivalenttoa1oopconsistingoftwodouble。actinghydrauliccylinders，anditissimulatedinMat
6、lab／Simulink．Theresultsshowthatthemoreairinfluid，thelowerbulkmodulusandthegreaterspeedfluctuationofthefixeddisplacementhydrauliccomponentduringthepowershift，SOthepowershift．qualityisworse；controlofthehyrdrauliccomponent’SdisplacementandextensionofloadtorquereversetimeCaneffectivelyred
7、ucethefixeddisplacementcomponentspeedandpressurefluctuationoftheclosedhydrauliccircuit．Keywords．fluidaircontent：bulkmodulus：hydro．mechanical；infinitelyvariabletransmission機(jī)構(gòu)M中的一種工況相配合(稱為一段)，最后兩路0前言功率流經(jīng)匯流機(jī)構(gòu)C匯流形成由若干無級(jí)段相銜接并逐段升高的全程無級(jí)變化輸出速度。該傳動(dòng)綜合液壓機(jī)械無級(jí)傳動(dòng)(Hydro—mechanicalvariable了液壓和機(jī)械傳動(dòng)的優(yōu)點(diǎn)
8、，具有無級(jí)
