外文文献翻译-犁式除雪车除雪装置设计

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1、北华航天工业学院毕业设计外文翻译北华航天工业学院本科毕业论文外文资料翻译设计(论文)题目犁式除雪车除雪装置设计作者所在系别机电工程学院作者所在专业车辆工程作者所在班级B13141作者姓名罗辉作者学号指导教师姓名刘志强指导教师职称讲师完成时间2017年3月北华航天工业学院教务处制北华航天工业学院毕业设计外文翻译HistoryOfTheSnowblowerSowhodidinventthesnowblowerorsnowthrower?Weneedtobeginbyqualifyingthatquestionsince

2、thereareanumberofanswersdependingonyourinterest.Somenotablefirstswouldbe:●Thefirstmachinetoclearsnowbythrowingorblowingit●Thefirstfullymobilesnowclearingmachine?●Thefirstdomesticwalk-behindsnowblowerThelatteristheonepeoplegenerallythinkofandhavethemostinterest

3、in.Itisalsotheonethathasthemostelusiveanswer.Chapter1Sowherediditallbegin?Lookingbackintimeweneedtoconsiderwherewouldtherebeaneedtoremovesnowwhilehavingasourceofpoweravailable?TheneedandtheenablingpowerwerefoundontherailwaysoftheU.S.snowbeltandinCanada.Theearl

4、iestdocumentedartbelongstoaTorontodentistknownasJ/WElliot.His1869patent#390designwasneverbuilt.ThestorynexttakesustoOrangevilleOntario,CanadawherewefindOrangeJull,agristmilloperatorandinventor.In1884heappliedforapatentandwassubsequentlygrantedpatent#18506.Jull

5、didnothavethemeanstobuildandcommercializehisinventionsohecontractedthelocalLesliebrotherstobuildthemachines.TheJull/Lesliemachineswereselfpoweredbutnotselfpropelled.Alocomotivewasusedtomovethemachine.TheJulldesignconsistedof2largeinlinefansrotatinginoppositedi

6、rections.Theleadfanchewedintoandpulverizedthesnowwhileblowingitbackintothedischargefan,whichpropelleditintothesky.Duetocloggingproblemsitwassimplifiedtoasinglefan.Furtherchangestoeffectivelycontrolthedischargeweremadeincludingamovabledeflectorandpitchingimpell

7、erblades.ProductionwasmovedtotheCooklocomotiveworksinseverallocations.Additionalmachineswerebuiltunderlicense.Finally5machineswere"homebuilt"byenduserswiththelastonefinishedin1971.Inall146werebuilt.Laterworkconsistedoffortifyingthedesigntodealwiththehazardsoft

8、heunknown.Trackswereoftenblockedwithfallentreesandotherdebristhatwereconcealedinthesnow.Legendhasitthatinonecaseaherdofcattleweretrappedandburiedunderthesnowontherailbed.Astherotar