装载机国内现状与市场开发之分析外文翻译.docx

装载机国内现状与市场开发之分析外文翻译.docx

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装载机国内现状与市场开发之分析外文翻译

毕业论文外文翻译

题目:

装载机国内现状与市场开发之分析

专业：

机械设计制造及其自动化

班级：

机升111班

学号：

姓名：

指导教师：

DomesticMarketPresentSituationAndTheDevelopmentOfTheExcavatingLoaderAnalysis

Theloaderdiggerissocalled“twofavour”.Becauseithasspecialstructure,loadsdevicebeingtheheadandtheequipmentfortheexcavationbehind.intheworkplace,youneedtoturnthechair,completingthechangefromloadertotheexcavatorloaderdiggerismainlyusedforthehighwayconstructionandprotectofthecityandvillage,theelectriccablebuild,electricpowerandairportengineering,municipalservicesconstruction,farmlandirrigationconstruction,villageresidenceconstruction,openingmountaintotakestoneandvarioussmallscaledandmulti-functionengineeringmachine,generallyusedinthesmallprojectafterthecompletionofthebigones.

FIRST:

ACLASSIFICATIONOFTHELOADERDIGGER

Theloaderdiggerissocalled“twofavour”havingtwokindsoffuncitionsofladingandscoopingoutinthemeantime.Theclassificationsareasfallows

ONE:

fromthestructure

Accordingtothestructure,loaderdiggershavetwokindsofforms:

oneiswithobliquetonesmoveframe,thedingingdevicecanbemovedwithside,whichiseasytoworkinthespecialplace,thecenterofgravityislowerwhenittransports.Itisadvantageoustoloadingandtransporting.Theweaknessis:

becauseoftherestrictionofthestructure,thegroundjackusuallyadoptsverticalleg.Thesupportingpointiswithinthewheeledge,thedistanceofthetwosupportingpointisrelativelysmall.Whilescoopingthewholemachine’sstabilityisbad.（especiallythescoopingdevicemovestooneside）.Thefunctionalmainpointofthiskindofmachineisintheaspectsofloading,producingmoreinEurope;theexcavationdeviceofthelattercan’tmovetoside,thewholeexcavationdevicecanmake180°turn-overthroughtherotarysupporting,thegroundjackislikethefrogleg,thesupportingpointcanstretchoutsidesidethewheel,thestabilityisgoodwhenexcavating,whichisadvantageoustotheexaltationofwithexcavationability.Becausehavingnoobliquetonesmoveframe,thecostofthewholemachineislower.Theweaknessisthebuckethangsatthetruck’stail,thesizeislong,whenthelocomotiveisinconveyanceandloads,thestabilityisbad,whichhascertainscooping,withtheUSproducingmost.

TWO:

fromthemotiveallotment

Fromthemotiveallotment,theloaderdiggerhastwokindsofforms:

two-wheel（rear-wheel）todriveandfour-wheel（wholeround）todrive.theformercan’tmakeuseofadherencetoweightcompletely,makingtheadhesivestrengthofmotorcycleandgroundandtheleadingforcearetodescend,butthecostismuchlowerthanthelatter.

THREE：

ofthebedrock

Fromthebedrock,amongthe3kindsofcommonbedrocksusedinthesmallscaledandmulti-functionengineeringmachine,themotiveoftheminiatureloaderdiggerismostlybelow20KW,theheightofthewholemachineis1000-3000Kg,adoptingtrack-runstructure,thespeeddosenotreach5km/husuallyusedfortheyardageprocessingofsmallscales,suchasfarmandpark…etc.

Becauseitsmodelispartialtosmall,costishigheris30-60KW,theweightisrelativelyheave,about5000-8000Kg,thescoopingabilityisstrong,useswheeledwalksthestructure,drivenbythewholeround,makinguseoftheturnrounddrivingaxleorhingejoint,thecarspeedishigher,reachingto20km/h,theabroadusuallyuseitasassistanceworkfortheyardageprocessingandlarge-scalefabricatingyardoffarm,capitalconstruction,roadmaintainance…etc.thismodel’sshapeisbigger,theflexibilityisworse,generallyithardtoadapttheworkofnarrowandsmallplace.

SECOND:

localpresentconditionanddevelopmenttrendofloaderdigger,localtechniquecondition

Atpresentinourcountrytheenterprisesproducingtheloaderdiggersaremorethan10hours,mainlyisSHANDONGmechanicalengineering,YANTAImechanicalengineering,LIAOLINGCHAOYANGmechanicalengineering,LIUZHOUmechanicalengineering,XIAMENmechanicalengineering,XUZHOUmechanicalengineering,etc..Currentlytheproduct’syearyieldisabout400pedestals.Fromthehistoryofoursmallscaledandmulti-functionloaderdigger,wecanseethatourmachinehasbeendroppingbehind,itsdevelopmentspeedisslow.Ourcountryjuststartedtodesignitbyourselvesatthebeginningof70’sinlastcentury,firsttheBEIJINGbuildingmechanicalengineeringdevelopedsuccessfullyWZ2AandWZ2hudraulicpressureloaderdigger,theYANTALmechanicalengineeringmanufacturesZW2AandWZ2Bhydraulicloaderdiggersuccessfullyin1987,AfterthattheFUJIANmechanicalengineering、SHANDONGGUANGRAOhydraulicpressureengineeringdeveloptheloaderdiggersofWZ25,DFH-904WZ,T55Z/W0-25respectively.TheLIUZHOUexcavateloading、LiuzhouProjectMechanicalLimitedliabilitycompanydevelopedWZ30-25andWZ25-20loaderdiggersrespectivelyin1992.injuly,2001,theSHANDONGProjectMechanicalLimitedliabilitycompanysuccessfullydevelopedWZ30-25loaderdigger.

Theproductsproducedbythefollowingmanufacturersaremainlyrepresentingthetechniquelevelofdomesticloaderdigger.

①theWZ30-25loaderdiggerofCHANGLIN:

theenginesystemadoptscominsturbinepressurizationengine.theratedoutputis63kNs,thetapaccordswithEuropeanstandard.Theturnroundforstandardtruck（frontaxle）isnon-drivenswingaxle,thebearingsadoptimportedpieces.Choosetouseimporteddrivingaxle（backaxle）kittedtoloaderdigger.Havingnon-maintenancewetbrake,whichgreatlyraisethesafetyandthecredibilityofthetruckbeltdifferencespeedpadlockraisesthedrawbarperformanceofthewholetruck.Thestandardtruckdrivenbytwo-wheel,canbeequippedwithafour-wheeldriveaccordingtothecustomer’demand.Thehydraulicsystemadoptsefficientgearpumpsystem,themainpartssuchaspump,selectorvalveandredirector,allchooseforeignwell-knowncompanies’products.

②theWZ25-20ofYANTALProjectMechanicalLimitedliabilitycompany:

WZ25-20loaderdiggertakesloadingmachineformainpart,withtheheadrefittedtomulti-purposebucket,thebackendaddedexcavationdevice..The904WZloaderdiggerofonedragDONGFANGredisbasedontheLF90tractorwhosetechniqueisbroughtfromItalianFiat,withthecorollarydesignoftheagricultureengineeringmachineofvariousfunctions.

③TheWZ30-25ifLIUZHOUExcavationcarloaderfactory:

TheLIUZHOUExcavationcarloaderfactory’sproductofWZ30-25loaderdiggerandtheWZ30-25loaderdiggerofLIUZHOUengineeringmachineryincorporatedcompany,allarenewproductsbasedontheCATtechniqueandcombinewithourcraftsmanship.thesetwomodelsalladoptspecialbedrock,adoptthetechnologyoftheloadtelesthesiacontrolasthesameastheCATcompany.Asthesetwomodelsadoptvariablesystem,sotheyhavehigherrequesttocleannessandreliabilityofsystem.

④theLIUZHOUAOLIUmachinemachineryincorporatedcompanyseriesofloaderdiggersofHACH995

Engine:

providedwiththesophisticatedturbopressurizationdieselengine,theratedoutputreachesto95horsepowers,reachingtothetorsionalforceof384

attherotatespeedof1500ture/theminute.Thecorepartsadopttheimportedfamousbrandproductintheworld,thecredibilityishigher.Allnewexternalappearanceispleasingtoeyes,thecabroomisrelativelylarge;thestandarddisposalof4in1bucketmakesthemachinehavemoremulti-functionanduse.Variousworkenclosurescanbechosentogotogetherwith,beingcompetentwithmoreworks;adoptingspecialframeoftheloaderdigger.Thecabroomcanbereplacedrespectively,associatedwithframethroughfivedampingdecoupledevicesthehydraulictankandburningtankalsocanbereplaced,andlaidinlowbit,benefitinloweringthemachine’scenterofgravity,exaltingthestability,andissuitableforfueladdandfix-checkontheground.Theyalsobecomethepartofstairswhenascendingthetruck.

⑤TheWZ30-25ofTAIANSHIloadingmachineryincorporatedcompany:

Motivesystem:

Thismachineadoptsthe4BT3.9-C74turbinepressurizationengine,withthecharacteristicsoftightstructure,greatpower,lowoilconsume,littlenoise,workcredibilityandlonglifespanetc.Thehydraulicsystem:

ThismachineadoptstheoriginalpumpandmanoeuvringvalveofGermanLELISHI.Thesystemadoptsloadtelesthesiacontroltechnique,whenthevalveplugofthekingvalveissituatedinmesoposition,thedifferentialpressurethatisproducedbymanoeuvringvalvefeedbacktovarabledeliverypump,soastoreducetheoutputofthepumpautomatically,makethedischargenearlytozero;Atthistime,thepressureofpumpattainstosetpressureof22MP,inordertoguaranteethepressureofthehold-downcylinder.Whileworking,accordingtotheopeningofthemanoeuvringvalve’splug,thepumpprovidesthedischargeofwithdemand,avoidingthewayofcontrollingoverflowbythetraditionalhydraulicsystems,reducingtheemptyflowlossofhydraulicpowerwithmaximum.Workdevice:

Theanti-spadeequipsisthestructurewithobliquetonesmoveframe,fastenedbyfourhold-downcylinderandrearcarframe.Theanti-spadedevicecanmovesidealongtheslipperyway,extendingtheworkscope.

Themovablearmoftheanti-spadeequipsadoptsabigone,whentheswingtakesback,itisadvantageoustoreducethesizeofhorizontalshape.Whiletraveling,theanti-spadedevicefollowingaslipperywaymovetoleftorright,withthepoleandbucketputtingaway,thenswingingtotherearframeofthetruck.Thusreducingthelengthsizeconsumedly.Whenthewholemachineisrunningandtransferring,raisingtheflexibility,makingthemachinebeabletotransferint