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.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
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