挖掘机论文中英文资料外文翻译文献Word文件下载.docx

挖掘机论文中英文资料外文翻译文献Word文件下载.docx

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挖掘机论文中英文资料外文翻译文献@#@挖掘机论文中英文资料外文翻译文献@#@外文文献@#@ASummaryofSmall-sizeExcavatorsHomeandAbroad@#@I.Thebriefintroductionofhydraulicexcavator@#@Partssuchasthehydraulicexcavatorisbyengine,hydraulicsystemandworksdeviceandwalksdeviceandelectriccontroletcareformed.Thehydraulicsystemisformedbyhydraulicpump,controlvalve,hydrauliccylinder,hydraulicpressuremotor,piperouteandfueltanketc.Theelectriccontrolsystemincludessupervisiondish,motorcontrolsystem,pumpbrainandvariouskindsofsensorandsolenoidvalvesetc.Thehydraulicexcavatorisgeneralbytheworkdeviceandturnsroundthedeviceandwalksdevicethreeismostlyformed.Accordingtohisconstructionanduse,wecandifferentiate:

@#@manykindsoftypessuchascaterpillartreadtype,tyretype,walktype,fullhydraulicpressure,halfhydraulicpressure,turnsroundentirely,notturnsroundentirely,utilityversion,mouldforaspecialpurpose,thejoiningwithahingetypeandarmtypestretchedoutanddrawnbacketc.@#@Theworkdeviceisdirectlyaccomplishingthedevicethatexcavatestheassignment.Ithasbeenjoinedwithahingebymovesthearm,fightsthepoleandshovelsthefilletcthreeparts.Movingthatthearmrisesandfallsandthepolefoughtstretchesoutanddrawsbackandshovelingfightingmovesallwithmovingbackandforthtypetwoeffecthydrauliccylinderscontrol.Inordertosuittheneedsofvariousdifferenceconstructionschoolassignments,thehydraulicpressureexcavatorcanbejoinedinmarriageloadingmanykindsofworkdevices,ifexcavatingandmanykindsofschoolassignmentmachinesandtoolssuchasliftingjob,loading,leveling,clampandpushessoilandshockhammeretc.@#@Turningroundandwalksthedeviceistheorganismofhydraulicpressureexcavator,uppersettinguppower-ondeviceandtransmissionsystemofturntable.Theengineisthepowersupplyofhydraulicpressureexcavator,andadoptsdieseloilwillalsocanmodifytheelectromotorintheconvenientplacemostly.@#@Thehydraulicdrivesystembywayofthehydraulicpumpwiththeenginethemotiveforcetransmissiontohydraulicpressuremotorandhydrauliccylinderetcactuator,thepromotionworkdevicemoves,thusaccomplishesthevariousschoolassignments.TakemorePV-200'@#@smouldhydraulicpressureexcavatorsofuseinbuildingsiteastheexample.Thismachineadoptsthetypetheopeningcenterloadofadvancedversiontobepassedfeelingsystem（OLSS）.Thissystemiswithobliqueofcontroltypeobliquethemethodofangle（exportvolumeofflow）variableplungerpump,andreducedthepowerdeliveryofengine,thusreducestheoilconsumptionburnt,andisonekindofsavingenergymouldsystem.Thecharacteristicofthiskindofhydraulicsystemis:

@#@thefixedtorqueiscontrolled,anditisunchangeabletokeepthehydraulicpumpdrivetorque,andyearabsolutelycontrolcanreducetheoff-loadinglossofschoolassignmenttime;@#@Oilcapacityiscontrolled,andtheexportvolumeofflowofhydraulicpumpinthetimeofcanreducingneutralgearandfinecontrolreducesthepowerloss.@#@Thehistoryofthefirsthandexcavatorwaspublisheduptonowtohavemorethan130years,andwentthroughfromthesteamdrivefilltoturnroundthatthemachineryturnsroundthedevelopingthecoursestepbystepofthecompleteautomatichydraulicpressureexcavatorofexcavatorandapplicationmechanicalandelectricalliquidintegrationtechnologytopowerdriveandtheinternal-combustionenginedriveinthetime.Theapplicationowingtothehydraulictechniquehadtojoininmarriageonthetractorloadinghydraulicpressuretoanti-thetypehangingwhichshoveledmachineryinthe1940’s,anddevelopingoutthepullingtypeattheinitialstageofinthe1950’swithmiddleperiodinsuccession,toturnroundthefullhydraulicpressureofhydraulicpressureexcavatorandcaterpillartreadtypeentirelymechanical.Initialstagethetrialhydraulicpressureexcavatoristhehydraulictechniquethatadoptsplaneandmachinetool,lackingthehydraulicpressurecomponentthatissuitableinthemechanicalvariousoperatingmodes,itisstableinadequatelytomakethequality,andnecessaryisnotcompletelyyet.Frominthe1960’s,thehydraulicpressureexcavatorisenteredthepopularizationandinvigorousdevelopmentstage,andmechanicalmanufacturingplantandthebreedofeachcountryincreasesveryfast,andtheoutputisrapidlyincreased.83%ofthemechanicalgrossoutputwasoccupiedtohydraulicpressureexcavatoroutput,andiscloseto100%atpresent1968-1970certainperiod.@#@ⅡSmallexcavatordevelopmentanditstendency@#@20thcentury80~90'@#@ssmallmechanicaldeviceinconstructionandsooninmunicipalengineering,transportation,pipelinehasdisplayedabiggersuperiorityandcanrapidlydevelop.Thesmallexcavatorforsavedthemanpower,thephysicalresourc