挖掘机论文中英文资料外文翻译文献.docx
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挖掘机论文中英文资料外文翻译文献.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
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