提升系统和安全装置 毕业论文外文翻译

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1、英语原文HoistingSystemAndSafetyDevicesThomasD.BarkandSeniorMember,IEEEMineSafetyAndHealthAdministrationPittsburgh,Pennsylvania15236Abstract–Asnoted,therearetwomainoperatingmalfunctionswhichcanoccurinahoistsystemthatcankillmenanddamageequipment.1.Overtravelattheshaftext

2、remity.2.Overspeedduringthedutycycle.Whatisrequiredinthecasejustillustratedisadevicethatwouldcheckhoistspeedfarenoughdowntheshaftsothatiftheconveyanceweretravelingtoofastatthatpoint,thehoistwould“E”stopsoonenoughtobringtheskiptoastopbeforeitovertraveleditsstoppingp

3、ointanddiddamage.Thispaperdiscussestheapplicationofasuspensionropebraketoasingleropeminehoist.Technicalchallengesassociatedwithacceleratedropebrakeliningwearandsuspensionropelubricationareaddressed.HOISTINGSYSTEMThehoisttogetherwithitsassociatedplantforanundergroun

4、dmineisthesinglemostimportantandexpensivelementofthemineplant.Thehoistplantconsistsofallthosecomponentsofmineplantthatarenecessarytoelevateore,coal,stone,orwasteandtoraiseandlowerpersonnelandmaterielinthemine.Itiswiththehoistingsystemitself-thesecomponentsofthehois

5、tplantlocatedinthehoistroom-thatengineeringdesignismainlyneeded.Thesekeyfactorsgovernhoistselection:1.Productionrate,ortonnagetobehoistedperunitoftime2.Depthofshaft3.NumberoflevelstobeaccessedTherearebasicallyonlytwohoistingmethods,plussomemodifications,inusetoday:

6、drumandfriction.Thedrumhoiststorestheropenotextendedintheshaft.Thefriction-sheavehoistpassestherope(ortheropes)overthedrivewheelbutdoesnotstoreit.Aminormethodthathasfallenintodisuseisreelhoisting,inwhichasinglewidthofropeiswrappedinmanylayers.AnewmethoddevisedinSou

7、thAfricaforverydeepshaftsismultidrumhoistingusingmultipleropes.DESIGNOFHOISTINGSYSTEMThedesignprocessforaminehotstingstytemshouldbeunderstoodbytheminingengineer,enenthoughthedesignandinstallationarecontractedtoanengineer-constructorfirmandtheequipmentbidtoahoistman

8、ufacturer.Typically,theminingcompanydevelopingthemineassignsitsownengineeringdepartmenttomonitortheentireprocess,includingboththeplanningandconst