自卸汽车液压系统设计

!##$%&’()*++#$,-./0*#1!#$%&’!#$%%$&’($$%%$&)(*#$%%$+,#$%%$&’(+#$%%$&-(’#$%%%&$(-#$%%%&!(.&$%%%($%%!)#$%%$&!(!%/0123456.%$!!720480189:7;57315=577?@315=577A5B35C#$%%%!!DE;4FF:GGH?9517I5J23B5E47H725K048LE421E=7M4N3455134N342;5M012;/EB34N048LE4721:J23E4O48:721H#91EJ55834N7EG?K513J04LE421E=LE4G5154J59;3=085=I;30#95447H=B0430PD:45#!)).!$Q;5E8E15RA0II0IE12315=577LEKK:43J023E479134J3I=57S910J23J5915423J5T0==O4J#!))’!*U03K34U;E4NL;04N=5V304N/:W30EU;54NF13B521034/E85=34N048/E85=?40=H737GE1A50=PQ3K5?II=3J023E4#!)))!,R:4NPX6550489H:4NT:4L;04NLE421E=EGT50BHP8:2HAEYE23JMZJ0B02E1:734NQ3K5F5=0HLE421E=C32;RC32J;34N?J23E4C32;O425N10=R=3834NR:1G0J591EJ55834N7EG2;5$%%!OMMMO42514023E40=LE4G5154J534AEYE23J7S?:2EK023E4R5E:=[E150P/0H$!P$’$%%!!&$%%$P!$P%*(&$%%*P%*P$+((()#*+,-!#.%)(/)(*!!%%%.*$!!$!)-’!!!!!K0Z\!!]!!!#!$@&!(%%\,!K0Z!^N&#!KK&$(’!\’%(^)^$^NB_K34&*()!\!%%%’!!^YBK_1&,(!!@!#!$%+#!+K_7$!%+#%-^N%-#%)&/90(^^NB)^$$%7!%#!+7^YB!$!$!!$$!$*!##$%&’()*++#$,-./0*#1!#$$%&$’!#$%!&’()!!()!’*!!)*!&+,!(-!!(-)./#,’(-!’($$./#0%1,).12345#0#6%1!(-(678918:2;7=1?@9A;78B87;--(!-$+!’’’%&5’,C.&5+’(’)%(D%!!E)*+%+-’’%!D’(F3,F.!-+!G,%GHI312J,K.!$+!’’’%--.-%GLI312J,M.’33(D!D’(K+33)#)%33GHIGLI,-()!)():00C’J2345-)’312J!’’J2345-)’312JM’J2345/-7NOK’*C’*$’*#)%-(-6,!.!##$%&’()*++#$,-./0*#1!#$%&’!!#$#%#%!&$$’#!#$#’&&’()*&!&&’(()&$&&’((*&%&&!++!!!!++$,+$,+*#SponsoredbyLuoyangMiningMachineryEngineeringDesignInstituteEdited&PublishedbyEditorialOfficeofMINING&PROCESSINGEQUIPMENTEditorinChiefMIN-GONGLIUAddressChongqingst.,Luoyang,Henanprov.,ChinaPostcode471039Tel&[e-mail]@sina.comGeneralDistributorChinaInternationalBookTradingCorporation(GUOJISHUDIAN),P.O.Box399,Beijing,ChinaDistributionCode4160MSubscriptionRatesInChina:10.00CNY(Postagefree);Inoverseas(USD):39.48perannum(Annualpostage:Seamail18.10;Airmail54.30)Beij[e-mail],ChinainAugest,2003Mining&ProcessingEquipment(M&PE)isalargestatelevelappliedtechnologyperiodicalpulishedinpublicathomeandabroad,approvedbytheMinistryofNationalScience&TechnologyandreportedtoNationalNewsPublicationBureaforregistration.HersponsorisLuoyangMiningMachineryEngineeringDesignInstitutewhichisanadministrationinminingandprocessingequipmenttradeofChina.M&PEisamajorinformationsourceandaconnectingtiewhichisstable,reliableandunseparate,servingformanagement,design,manufactureandoperationdepartmentsofthetrade.AlsosheisacorejournalinChineseonMineralengineeringcircleapprovedbythestate.CitedorIndexedbyDecadesofOtherJournalsorIndexLibrariesCONTENTSNo.8(Augestlssue)2003,Volume31,SerialNo.320SELECTEDTunnelers&ExcavatorsStudyonFullyMechanizedDrivingTechnologsofGatewayinSlicingMining.......................................................................................................................................................ZHAIXinxianetal.()Firstlythisthesisstudiesonthematingrelationshipamongtunnellingmachineanditslattermatingequipmentsillustratestheprincipleofselectingschemeofsupportingmaterialshaulaged.SecondlyaccordingtothecharacteristicsofgeologicalconditionofthickseaminEgroupandslicingminingwitheconomicalextractingequipmentofcoalfaces,themainproblemsandtheirtackledmethodsarecompletelydiscussedwhichexistsindrivinggatewaysoftheuppermediumanddownslicingbeddingsinthickseam.Finallythetwosortsofappliedproductivelinesoffullymechanizeddrivinggatewaysinslicingareputforward.Theycanbepopularizedincoalminesofthesimilargeologicalcondition.DescriptorsFullymechanizeddrivingFunnellingmachineGatewaySlicingminingResearchofNetworkVirtualAssemblyinRock-DrillingRobot...........YUNZhongetal.()ThispaperdiscussestheprocessofusingVirtualRealityModelingLanguage(VRML)tomakeavirtualassemblyinrock-drillingrobot.Notonlycheapnessbutalsoreality,nicermutualeffectareshowedviaapplyingVRtechnique.Meantime,asthevirtualmodelcanbetransportedthroughInternet/Intranet,canbeviewedongeneralcomputers,itwillhelprealizingthelong-distancedesignandmanagementofrock-drillingrobot.DescriptorsRock-drillingrobotNetworkvirtualassemblingVRMLStatusandDevelopmentTrendofCencreteWetoSpayer............................JINGuangfa()Thispaperdescribesthedevelopmentofconcretewet-spoymachinesandthestructures,operationprinciplesandapplicationresults.Thekeysubjecksshouldtoberesearchedanddevelopmenttrendsafterwordsareoffered.DescriptorsConcreteWet-spayerApplicationDevelopmentApplicationofBeadWeldingTechniqueinPick..................................YAOShuyuetal.()Highspeedsteellayerscoatedpick'sbasewithbeadweldingtechnology,andarebondedmetallurgically.Thecoatinghashigherhardnessandwearresistance.DescriptorsBeadweldingHighspeedsteelPickCoatingNewWaytoconcreteSupportinginUnderground....................................LUJiangzhu()Loaders&HaulersSituationoftheEngineeringMachineTechnologyandIntelligentizedInformationalEngineeringMachine.............................................................................................DINGGuoqiangetal.()Thisarticleintroducesthesi