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1、分類號UDCY997746《密級編號十．初大學CENTRALSOUTHUNIVERSTTY碩士學位論文論文題目液壓挖掘機功率匹配節(jié)能控制立鎏區(qū)達墜盟塞學科、專業(yè)機械設(shè)計及理論研究生姓名常毅華導師姓名及專業(yè)技術(shù)職務(wù)何清華教授中南大學碩士學位論文ABSTRACTHydraulicexcavator,knownasakindofconstructionmachinewithhighpowerandhi曲energyconsumption，playsanimportantroleintheconstructionofthenationaleconomy．However,duetothes
2、everewasteofenergyresultedbyitshi曲energyconsumptionandlowenergyusage，itcallsforurgentlytheresearchonenergy—savingofhydraulicexcavator．Thisthesisfirstgivesageneraldescriptionofthestatus—quooftheresearchesbothhomeandabroadontheenergy—savingofhydraulicexcavator，andthenfocusesonreducingtheenergyl
3、ossbytheimproperpowermatchingaftertheanalysisofthemainenergylossesofhydraulicexcavator．Next，thethesisexploredtheworkingcharacteristicsoftheengine，advisestooperatetheenginebytheinductionofrotatespeedandalsodesignstheauto—idlingoftheengine．Intheworkingprocessofthehydraulicexcavator，theabsorbedp
4、owerofthehydraulicpumpissetoverthehighestoutputpoweroftheengineandthepowermarginoftheengineiscancelled，whichmakesitpossibletoexertthepotentialsoftheenginebetter．Thisthesisalsoputsforwardamethodnamed“P·Qcurvecorrespondcontrol”，namely,throughthecontrolofrotating—speedinduction，thepumpunderthewo
5、rkingconditionCanadjustthequantumtochangeP—Qcurveaccordingtotheload．ThisCanmaketheengineworksunderthebestworkingareaandsavethefuelconsumption．Atthesametime，confirmthedifferentpoweroutputmodeandworkingcondition，operatetheengineandpumpdifferentlyaccordingtOthedifferentrequirementsunderdifferent
6、workingconditions，andalsomakecontrolstrategies．Taketheengine，thehydraulicpumpandtheloadasadynamicwholetostudyanddesigntheenergy-savingcontrolsystemofthehydraulicexcavatorinordertOmakefulluseoftheoutputpoweroftheengine，improvetheworkingeffectandreducethefuelconsumption．Experimentisanotherstres
7、sinthisthesisandthreepurposesareattainedthroughalargenumberofexperiments：firstly,itprovesrespectivelythatthefluctuationofrotatingspeedofengineundertheII中南大學碩士學付論文ABSTRACTconditionoftheidlingandoverloadoftheenginehassomeeffectonthefuelconsumpt
