毕业设计论文资料[精编].doc

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1、TowercranetowercraneHistoricalproductionStackercranepillarcranetower,alsobeknownastowercrane,whichisoriginatedinWesternEurope.Accordingtotherecord,thefirstpatentonthetowercraneisawardin1900.Appearedin1905withafixedtowercranejib,.In1923,thereisaprototypeofmoderntower

2、crane,inthesameyearthefirstrelativelycompletemoderntowerappeared・In1930,Germanybeganmassiveproductingtowercranes,andusedforbuildingconstruction.Tn1941,thetowercraneindustrystandardDIN8770waspublishedinGermany.Thestandardssetoutbyhanging(t)andamplitude(m)oftheproduct

3、(tm)tore-torquewiththetowercrane'sliftingcapacity.Chinatowercraneindustrystartedinthe1950s.ComparedtothecraneindustryofWesternEuropeancountrieswhichwascausedbytheweakconstructionindustry,thetowercraneindustryinChinaisinaperiodofrapiddevelopment.FeaturesFromthetechno

4、logicaldevelopmentoftowercrane,althoughthenewproductisendless,newproductsinproductionefficiency,easyoperation,easymaintenanceandreliableoperationwereimproved,butthetowercraneisnotafundamentalchangeoftechnology.Theresearchofthetoweristowardmodulardevelopment.Theso-ca

5、lledmodular,whichisthecoreofthetowerstructure.Accordingtothestructureandfunctionalcharacteristics,thetowercranecouldbedividedintoseveralpartsandseveralmodulesbasedonuniversalseriesandtherequirementsofthesystem.Implementationofmodulartow,towercranewillhelptospeeduppr

6、oductdevelopment,productdevelopmentcostsavings,andbetterserveourcustomers.Thetowercraneawaysbeseparatedintotherotarytowercraneandslewingtowercraneundertwocategories.ThcCarryingCapacityofformerishigherthanthelatter,inmanyoftheconstructionsite,weawayscanseethetopofthe

7、rotarysectionthataddahighrisetower.Accordingtowhetherthemobileltisdividedinto:Travelingandfixedbasedonthetowercanmoveornot.Towercranefixedstationaryswitchinstalledintheconcretefoundationblock,orinstalledtheformofX-shapedsectionconcretefoundation.Productionpointsofth

8、einspectionoftowercranes1)Checktheconditionofmetalstructures,especiallyhigh-strengthbolts,whichconnectthesurface,shouldbeclearedofdust,pai