机械设计外文翻译

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1、西南交通大学本科毕业设计（论文）外文资料及翻译年级:2007级学号:20077657姓名:王雪扬专业:工程机械指导老师:李春林2011年5月13LoadingmachinesFormaterialshandinginconstruction,useismadeofloaders.Practicehasshownthatexcavatorsarelesseffectiveinthecapacityofloadsinquarriesandstoragesofnonmetallicmaterialsthanloaders.Bythekindofloadsha

2、ndled,loadersareclassifiedasforkliftloadsandscoopingloadersforloosematerials.Soopingloadersaredividedintosingle-bucketandcontinuous-actionMulti-bucketloaders.Single-bucketloadersaregeneral-purposemachinessuitedengineeringandinapplicationsrequringcontinuousworkingprocess.Dependin

3、gonthekindofrunninggear,crawlerandanailable.Crawlerloadershaveahighpassblibityanddevelopagreatthrustefftort.Wheeledloadersfeatureahighmanoeuvrabilityandhightravelingspeedsmakingnodamagetotheroadpavementandthestorageareas.Unloadersareusedforunloadingsand,gravel,crushedstone,cemen

4、tformrailwaycars.Powerandpneumaticunloadersareused,powerforunloadingmaterialsfromflatcarsorgondolacars(openwagons)andpneumaticforunloadingcement.Themainworkingmemberoffork-liftloadersistheforkservingtoloadandunloadpieceloads.Theseloadershavedifferentchangeattachments.Whenequippe

5、dwithbucketsorgrabs,theyareusedforloadinglooseandsmall-piecematerials,andtheboomattachmentmakestheseloaderssuitedforhoistingloadstoasmallheigheandsometimesforerectionworkinconstruction.Fork-liftloadersareoperatedonhard-pavementareas,thereforetheyaremainlyusedinstorehouseandasfac

6、torymaterials-handingequipment.Theyaremadeonthebasisofatruckthereforetheyarealsocalledtruckloaders.theyarepoweredbyinternalcombustionenginesorelectricmotorswithstoragebatteries.Enginepoweredtruckareusedforlargewarehouseandstock-handingapplication,forgeneralyardworkandfprloadinga

7、ndunloadingofvehicles.Torqueconvertertransmissionprovidessmoothoperation;powersteeringandall-weathercabsareoptionsavailable.13Single-bucketloadershaveacrawlertractororawheeledtruckasacarriermounting.Theloaderpermitsmechanizationofloadingconstructionanderectionandworkwiththeaidof

8、changeattachments,ofwhichthemainoneisthebucket.