轮机英语10课件

MarineEngineeringEnglish《轮机英语》APracticalCourseforEngineersWorkingonBoardShips

MarineElectricalSystemandAutomatizationLesson31

Unattendedmachineryspaces第31课无人值班机舱LearningObjectives:1.Graspsomeusefulwordsandexpressionsinthewholetext.2.Afterstudyingthelesson,heorshewillhaveabetterunderstandingofUnattendedmachineryspaces.3

4part1

NewWordsandExpressions5part2

TextAnalysisLesson31UMSThesophisticationofmodern

controlsystemsandthereliabilityoftheequipmentusedhaveresultedinmachineryspacesremainingunattendedforlongperiods.#现代控制系统的完善，以及所用设备的可靠性，使机舱可长时间处于无人值班的状况。Lesson31UMSInordertoensurethesafetyoftheshipanditsequipmentduringUMSoperationcertainessentialrequirementsmustbemet:为保证无人机舱运行期间船舶和设备的安全，必须满足以下基本要求：Lesson31UMS(1)Bridgecontrol.Acontrolsystemtooperatethemainmachinerymustbeprovidedonthebridge.Instrumentationprovidingcertainbasicinformationmustbeprovided.#驾驶台控制。驾驶台须安装有控制主机运行的操作系统。提供一些基本运行参数的仪表必须配备。Lesson31UMS(2)Machinerycontrolroom.Acentralizedcontrolroommustbeprovidedwiththeequipmenttooperateallmainandauxiliarymachineryeasilyaccessible.#机舱控制。集控室须提供有可方便地控制主机和辅机运行的设备。Lesson31UMS(3)Alarmandfireprotection.#报警和防火。Lesson31UMSAnalarmsystemisrequiredwhichmustbecomprehensiveincoverageoftheequipmentandabletoprovidewarningsinthecontrolroom,themachineryspace,mustalsobeprovidedthroughoutthemachineryspace,andafirecontrolpointmustbeprovidedoutsidethemachineryspacewithfacilitiesforcontrolofemergencyequipment.#需要一个报警系统，该系统必须全面覆盖设备，能够在控制室、机舱内提供警报，还必须在整个机舱内提供，并且必须在机舱外提供一个消防控制站，配备应急设备控制的设施。Lesson31UMS(4)Emergencypower.Automaticprovisionofelectricalpowertomeetthevaryingloadrequirements.#应急电源。自动提供电力以满足变化负荷的要求。Lesson31UMSEquipmentoperationfromthemachinerycontrolroomwillbebyatrainedengineer.#由受过培训的轮机员从机舱控制室操作设备。Lesson31UMSThevariouspreparatorystepsandlogicaltimedsequenceofeventswhichanengineerwillundertakecannotbeexpectedtooccurwhenequipmentisoperatedfromthebridge.轮机员承担的各种准备步骤和事件的逻辑定时顺序，当从驾驶台操作设备时，不可能期望发生。Lesson31UMSBridgecontrolmustthereforehavebuiltintothesystemappropriatecircuitstoprovidethecorrecttiming,logicandsequence.Theremustalsobeprotectiondevicesandsafetyinterlocksbuiltintothesystem.#因此，驾驶台控制必须在系统中内置适当的回路，以提供正确的定时、逻辑和顺序。系统中还必须内置保护装置和安全联锁装置。Lesson31UMSAbridgecontrolsystemforaslow-speeddieselmain

engineisshowninFig.31-1.#低速柴油主机的驾驶台控制系统如图31-1所示。Lesson31UMSControlmaybefromeitherstationwiththeoperatingsignalpassingtoaprogrammingandtimingunit.#控制可以从任一站点进行，操作信号通至编程和定时单元。Lesson31UMSVarioussafetyinterlockswillbeinputsignalstopreventenginestartingortoshutdowntheengineifafaultoccurred.#各种安全联锁装置将作为输入信号，以防止发动机起动或在发生故障时关闭发动机。Lesson31UMSTheprogrammingunitsignalwouldthenpasstothecamshaftpositionertoensurethecorrectdirectionallocation.#然后，程序单元信号会传递到凸轮轴定位器，以确保方向位置正确。Lesson31UMSAlogicdevicewouldreceivethesignalnextandarrangeforthesupplyofstartingairtoturntheengine.#接下来，逻辑装置会接收信号，并安排起动空气的供应，以转动发动机。Lesson31UMSAsignalpassingthroughthegovernorwouldsupplyfueltotheenginetostartandcontinueoperation.#信号通过调速器向发动机供给燃油，以启动并继续运行。Lesson31UMSAfeedbacksignalofenginespeedwouldshutoffthestartingairandalsoenablethegovernortocontrolenginespeed.#发动机转速反馈信号会关闭起动空气，并使调速器能够控制发动机转速。Lesson31UMSEnginespeedwouldalsobeprovidedasaninstrumentreadingatbothcontrolstations.#发动机转速作为两个控制站的仪表读数被提供。Lesson31UMSAbridgecontrolsystemforacontrollable-pitchpropellerisshowninFig.31-2.#图31-2显示了可调螺距螺旋桨的驾驶台控制系统。Lesson31UMSThepropellerpitchandenginespeedareusuallycontrolledbyasinglelever(combinator).#螺旋桨螺距和发动机转速通常由单杆(组合器)控制。Lesson31UMSThecontrolleversignalpassesviatheselectortotheenginegovernorandthepitch-operatingactuator.Pitchandenginespeedsignalswillbefedbackanddisplayedatbothcontrolstations.#控制杆信号通过选择器传递至发动机调速器和螺距操作执行器。螺距和发动机转速信号将在两个控制站被反馈和显示。Lesson31UMSTheloadcontrolunitensuresaconstantloadontheenginebyvaryingpropellerpitchasexternalconditionschange.#当外部条件变化时，负载控制单元通过改变螺旋桨螺距来确保发动机上负载恒定。Lesson31UMSTheinputsignalsarefromthefuelpumpsettingandactualenginespeed.Theoutputsignalissuppliedasafeedbacktothepitchcontroller.#输入信号来自油泵设置和实际发动机转速。输出信号作为反馈提供给螺距控制器。part3

Exercise&ExaminationForcrashmanoeuvrestheleverismovedfromoneextremetotheother,thesequenceofeventsisthencontrolledto_____.

A.starting,reachingfullspeedandbrakingB.stoppingoilsupply,braking,startingandreachingfullspeedC.reachingfullspeed,brakingandstartingD.starting,fullaheadthenasternIntheeventofminoremergencieswhenthemachineryspacesunattended,_____willbeinformedofmalfunctionsinthemachinerybyhiscabinmonitor.

A.thechiefengineerB.theengineeroncabinwatchC.thebridgeofficeronwatch D.themasterThemodernimprovementofcontrolsystemsandthereliabilityoftheequipmentusedhaveresultedinmachineryspaceremainingunattendedforlongperiods,knownas_____.

A.AVRB.UMSC.PSCD.CPPUMSaremainlyunattendedovernightandduringthistime_____shouldhavecontrolofthemainengine.

A.thechiefengineerB.theengineeroncabinwatch