施工升降机的创新设计外文翻译.docx

施工升降机的创新设计外文翻译.docx

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施工升降机的创新设计外文翻译

TheInnovativeDesignofConstructHoist

JiaWenhua,YinChenbo

InstituteofAutomobileandConstructionMachinery,NanjingUniversityoftechnology,Nanjing210009,P.R.China

AbstractInthispaper,thecurrentdevelopmentofconstructionhoistisreviewed.Thestructureandthecharacteristicsoftheconstructionhoistaredescribed.Thekeytechnologiessuchasthestructureofthediversityoftheconstruction,thetraction-liftconstruction,theintegratedwinchsystemandthecomputeraideddesignarediscussed.

KeywordsConstructionmachineryhoist;Innovativedesign;Electro-hydraulic.

1Introduction

Theconstructionhoistisakindofmechanicalmachineryusedtoliftpassengersandmaterialsalongtheverticalorrail-dumpingmast.Itiscomposedofplatforms,hopper,cageandsoon.Itcanhelptoimproveproductivityandreducecosts.Tomeettheneedsofdifferentkindsofconstructions,manynewtypesofconstructionhoistshavesprungupwhichhaveadvancedfunctions.

2Innovativedesignofstructure

2.1Commonstructure

Constructionhoistscanbedividedintofourtypesaccordingtothenumberofcageandmast.TheirrelativepositionisshowninFig.1.

ab

cd

（a）doublemastandsinglecage

（b）Singlemastandcagesonbothsides

（c）Singlemastandacagesinoneside

（d）Singlemastandacageinside

Fig.1Commonstructurediagram

Thehoistshavebeenwidelyappliedinconstructiontoenhanceproductivityandconstructioncostsgreatly.Thestandardsectionsofhoistswitheithersinglemastsectionsordoublemastsectionsareallconnectedbybolts,andfixedonthewallbyconnections.Therearemechanicalspringsfixedonthebottomframeofthisinordertoincreasethereliabilities.

2.2Severalnewtypesofstructure

Thetilthoisthasrail-dumpingmasts,whichcanbeappliedwherethebuildingisnotvertical.Itsmastisparalleltothefadeofbuildings.Itiswidelyusedforchimneys,towers,bridgesandotherhigh-risetiltbuildings.

Onefoldingandremovalhoistforlow-risebuildings’hasemergedinrecentyears.HefoldingandremovalhoistmadebyGermanBOCKERandithasagoodperformance.Thishoistcanpassthroughnarrowpassengerways,whenthestructureiscompact.Therailsectionsofthishoistcanrotate360aroundthebase,operatingeasilyandefficiently.Furthermore,therailsectionscanbeextendedandbendedsothatmaterialscanbetransportedconvenientlytotheroofofthebuildings.Accordingtothosesuperiorities,thistypehoistwillbeappliedwidelyinlow-risebuildings.

Toadaptthetrendofenergy-savingandsafety,theeffectivewaystooptimizethemachineryhoistsarereductionofself-weightanddiversityofproductforms.TheMB-hoistsmadebyItalyMABERhasatrilateralcross-sectionmast.Thistypeofmastsectionscanreduceself-weightbutnotlowerperformance,anditcanreducecostandbeinstallmentquicklyandeasily.TheCM-doublemastcansharethemastwithothercageorplatform,sothatitovercomestheproblemoflowutilizationaboutthetraditionaldoublemasthoist,increasestheloadcapacity.Ingeneral,thistypehoistissuitableinthelarge-scalebuildingsformaterialorpassenger.

3drivesysteminnovativedesign

Thedrivesystemisthecorepartofahoist,anditplaysasignificantroleintheadvanced,safeandcomfortablecharactersofahoist.

3.1Rack-and-piniongearsdrivesystem

Usingrack-and-piniongears,thedrivesystemhashighefficiencyandreliability.Therearetwotypesofconnectionbetweenthecageandthedrivesystem.Thefirsttypeisthatthedrivesystemarrangedwithinthecage.Itisfastenedonthehoist,drivingthehoistmovingdirectly.Anotheristhatthedrivesystemarrangeduponthecage,itisconnectedthecagebypins,drawingthehoistmovingindirectly.Theformoftheelasticfixingissimplerthanoftherigidfasteningandcancompensatefortheinfluenceandcancompensatefortheinfluenceofrack-and-piniongears,theseinfluencesincurredbytheerroroftheproductionandassembly.Theelasticfixingcanalsoavoidofthedamagesofthedrivesystemandplayabuffersothatthehoisthasastablebrake.

3.2Tractiondrivesystem

Thedrivesystemisdrivenbythetractor,andthespeedreduceroutputsthetorquetothedrayround.Thetractordriverthroughtheropesandthedrayroundthehoistmoving.

Thetractorhastwotypesofrelativeplacement,underneathtypeandtop-installedtype.Becauseofthecomplexofthestructureandthehighercost,theunderneathtypehasnotbeenappliedwidely.AsshowinFig.2,themannedhoistwithtop-installedtractionmachinedevelopedbytheauthorsofthis

Fig.2Mannedwithtop-installedtractionmachine

paper,whosetractorisfixedonbeam.Thishoistusestheover-speedgovernorandthesafetygears.Whenthespeedreachesorsurpassesagivenvalue,theover-speedgovernorwillstopandpullthesafetygears