我国液压挖掘机发展的几个重要阶段及其前景展望

:,,,(300131):,:1954,()W10012W50123040,10,1996123000,80,1967(711999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.),WY100;W460;WY60(,,),7080WY160WY250,,,,,,80:(Liebherr)A912R912;(Liebherr)R942;(Liebherr)A922R922;(Liebherr)R962R972R982,(Demag)H55H85;(O&K)RH6MH6,80,80,(Liebherr)();();,,,,90,,,,,:;;;;,,,90,,,811999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,8090,,(,,,);,,,,;,,,,(),,,,,,,,,;;;,PC100PC120PC200PC220PC300PC400(KES),,,,,2000911999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.12000,9021002300,6000(),,19941995,,,,,199870%,,,,,,30,:(1)(19671977),,,,(2)(19781986)(),70801230(3),(19871993),,,,2000(4),,(1994)1994,1995,;;;;,,,19983000021999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,19942150,19952336,1995199410%;19963104199531%;19973802199623%;19984500,199718%19941998,,,,,,,,,20%,,,,,()20t,405060708090100,40,90100,,1998300,7080,,2000,(),,,,,,;,,,,,,,::;;;;;;;121999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,58%,:();,,,200020,:94,,,,,10;;;;;;,,,,,,1998,,,,,,,,19984500,4300,199718%25%199819971998173331,5000,19989000,199810,,,1999,,:(1)7080100%WYWYL,(2),,,(3),199870%221999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,,1999,,,,,,21:,,1964,,30,1987,,:1998-12-09321999(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.CONSTRUCTIONMACHINERYNo.11999AbstractsandKeywordsTheCircumstancesofOurElectricPowerCon2structionandtheRequirementsforPowerCon2structionMachineryXiaoKeqinChinaHuadianPowerPlantEquipmentEngineeringCom2pany,Beijing,100073Abstracts:Thecircumstancesofelectricpowercon2structioninthelastfewyearsandnearfutureinourcountryareintroduced,whicharethemainkindsandcharacteristicsofconstructionmachineryinelectricpowerprojects,plansofdisposition,agapbetweenimportandhomemadeproductsandpowerconstructionmachinerysmarketandhisto2ry.Keywords:constructionmachinery,electricpowerconstruction,characteristicSeveralImportantPeriodsandtheProspectandFutureofHydraulicExcavatorsinOurCountryChenZhengliChinaConstructionMachineryIndustrialAssociationsExcavatorBranch,Tianjing,300131Abstracts:Thisarticleintroducesseveralimportantperiodsofourhydraulicexcavatorsdevelopment,pointsouttheshortcomingsincludedhomemadeandimportedproducts,estimatesanddiscussesthemarketofexcavators1Keywords:hydraulicexcavators,development,prospectADiscussiononEngineeringCranesintheHomeMarketYuanCunwuBeijingLiftingMachineryFactory,Beijing,100022Abstracts:Abriefintroductionofthehistoryandtendencyofengineeringcraneinourcountry,anal2ysisofthefactorsandinfluencesfromexternalen2vironmentandnationalpolicies,lawsandregula2tions,discussionontherequirementsofcustomers.Keywords:engineeringcranes,marketingFractalTheoryandItsApplicationProspectinConstructionMachineryChenGuoanCommandacademyofthecorpsofengineers,Xuzhou,221004Abstracts:Thispaperintroducedthebasicconceptsoffractaltheory,reviewedthecurrentstateandthedevelopmentsintheapplicationoffractaltheo2rytothecharacterizationofroughsurfaces,fric2tionaltemperaturedistribution,wearprediction,weardebrisanalysisandsoon,andanalyzedtheapplicationprospectoffractaltheoryinsolvingthefrictionandwearproblemsinconstructionmachin2ery.Keywords:fractalgeometry,constructionmachin2ery,friction,wear©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.