外文文獻(xiàn)翻譯-犁式除雪車除雪裝置設(shè)計(jì)

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1、北華航天工業(yè)學(xué)院畢業(yè)設(shè)計(jì)外文翻譯北華航天工業(yè)學(xué)院本科畢業(yè)論文外文資料翻譯設(shè)計(jì)(論文)題目犁式除雪車除雪裝置設(shè)計(jì)作者所在系別機(jī)電工程學(xué)院作者所在專業(yè)車輛工程作者所在班級(jí)B13141作者姓名羅輝作者學(xué)號(hào)指導(dǎo)教師姓名劉志強(qiáng)指導(dǎo)教師職稱講師完成時(shí)間2017年3月北華航天工業(yè)學(xué)院教務(wù)處制北華航天工業(yè)學(xué)院畢業(yè)設(shè)計(jì)外文翻譯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