轮机英语78课件.pptx

MarineEngineeringEnglish《轮机英语》APracticalCourseforEngineersWorkingonBoardShips

Lesson3

DieselEngineConstruction

柴油机结构2

LearningObjectives:1.Graspsomeusefulwordsandexpressionsinthewholetext.2.Afterstudyingthelesson,heorshewillhaveabetterunderstandingofDieselEngineonstruction3

4part1NewWordsandExpressions

5Lesson3DieselEngineConstructionINewWordsandExpressionsfoundationn.基础rigida.坚固的，结实的flexiblea.柔性的，灵活的hogv.使拱起，上拱sagv.使下沉，下陷flexv.弯曲并伸展longitudinala.纵向的individuallyad.独立地erectv.建立，竖立fabricateda.锻造的reamv.铰孔holdingdownbolts底脚螺栓thrustcollar推力环fittedbolt紧配螺栓tie-rod贯穿螺栓bearinghousing轴承座bedplate机座castiron铸铁fabricatedsteel锻钢

6part2TextAnalysis

Thedieselenginemainlyconsistsoftwokindsofparts:thefixedpartsandthemovingparts.Inthepartoneofthisarticle,wemainlytalkaboutthefixedpartsofdieselengine.Lesson3DieselEngineConstructionI包括，包含Text7固定部件运动部件柴油机结构主要包括固定部件和运动部件；这篇课文主要讨论固定部件。

Typicallythefixedpartsincludebedplate,tie-rods,A-frameandcylinderliner,etc.Thereisastructuraldiagramoflargemarinedieselenginebelow.（Fig.3-1）Lesson3DieselEngineConstructionI机座Text8贯穿螺栓机架典型的固定部件包括：气缸套

Lesson3DieselEngineConstructionIText9典型的固定部件包括：

Thebedplate(Fig.3-2a)isthefoundationonwhichthe2-strokeengineisbuilt.Itmustberigidenoughtosupporttheweightoftherestoftheengine,andmaintainthecrankshaft,whichsitsinthebearinghousingsinthetransversegirders,inalignment.Lesson3DieselEngineConstructionI基础Text10足够坚固曲轴机座是发动机的基础。。。轴承座对中

Atthesametimeitmustbeflexibleenoughtohogandsagwiththefoundationplatetowhichitisattachedandwhichformspartoftheship’sstructure.Lesson3DieselEngineConstructionI包括，包含Text11拱腰和塌腰结构机座也必须有一定的柔性（弹性）

Ifthebedplatewastoorigid,thenasthehullflexed,theholdingdownbolts,whichsecuretheengineintoth