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1、外文原文：TheverticalBoom-typeRoadheaderdesign1IntroductionMechanicaldesignisintheprocessofproductdesignandanimportantpartofthemainlinks,itisfollowedinprogrammedesignafterthedesignwork.TheverticalBoom-typeroadheader(theroadheader)totheoveralldesignofthemeritsofcompletemachineplayad
2、ecisiverole,andthedecisionoftheassembly,thesystem,coordinationbetweenthevariouscomponentsoftheunityandmatch,toobtainthehigh-endperformanceandoverallbettereconomicefficiencytechnology.Roadheaderdesign,includingthefollowing:1)Accordingtodesignprojectdescriptionchoicetypeandvario
3、uscellularconstructionpattern2)Decidesthecompletemachinethemaintechnicalperformanceparameter,Includingsizeparameter,heavyparameter,theparameterofmovementandthetechnicaleconomyreferparameter,3)Accordingtosystemdesignperformancerequirement,definitecompletemachinesystemcompositio
4、nandbetweenthemmatchaswellaseachpartmaintechnicalsenateparameter,4)Thenecessarywhole,andthemappingoftransmission,hydraulic,electroniccontrolsystems,andotherplans.2theselectedmodelsandvariouscomponentsandstructuraltype,drive,andtheoveralllayoutofthereasonableIndeterminingthecon
5、tent,firsttaskshouldbedesignedtomeetthecontents,especiallytheusersofthemaindemandsoftheinvestigation,thetwosidesexchangedviewsrepeatedly,tosatisfybothusers(orsuperior)conditions,canbettermeettheproductdevelopmentoftheoverallplan.2.1theselectedmodelsAccordingtoroadheaderuse,for
6、thecoalminetunnelboringorusedforothersectorsoftheworks,roadheaderworkingconditionsforcuttingcoalroadwayorsemi-CoalLane,thecompressivestrengthofcoalandrockone-way(orthevalueofplattscoefficientf)andtherockabrasionfactor.AtthesametimethecontrollineshouldbesuperscriptMT138~1995"ca
7、ntileveredRoadheadertypesandparameters",accordingtocuttingcoalandrockthebiggestone-waycompressivestrength,thetypeofselectedmodels.2.2thestructureofthevariouscomponents,thewaythedriveridentifiedRoadheaderbycuttinggeneralagencies,shippingagencies,walking,hydraulicsystem,electron
8、iccontrolsystemsandauxiliarydevices(suchasdustremovaldevices,
