新版轮机英语unit3dieselengineconstructionppt课件

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1、Lesson3DieselEngineConstruction理解柴油机的主要固定件理解柴油机的主要运动件活塞的冷却CylinderblockA-Frame(Entablature)BedplateTierodSeatingCylindercoverExhaustvalveInletvalveFuelinjectorCylinderPistonPistonringConnectingrodFour-strokedieselengineCombustionchamberPistonpincrankshaftCrankwe

2、b词汇Bearing;journal;bolt;bore;Clearance;dowelpinBedplate(机座)andFrame(机架)Thebedplate,whichinmostcasesisoftheweldeddesign,isbolted(螺栓）totheseatingwhichformspartofthedoublebottomoftheship.CylinderblockA-Frame(Entablature)BedplateTierodSeatingCylindercoverItissecured

3、(固定)inthetransverse(横向的)directionbymeansofboltsknownasside-chockbolts(侧楔螺栓)andinlongitudinal(纵向的)directionbymeansofend-chockbolt(端楔螺栓).Thecrankshaftrests(放置、坐落)inbearing（轴承）builtintocrossgirders(横梁)ofthebedplate.BearingCrossgirderHousingThesebearings,knownasmain

4、bearings,eachconsistoftwoshells(轴瓦)whicharesupportedinhousings(轴承座)machined（用车床加工）inthebedplateandsecuredbymeansofstuds(双头螺栓)andbearingcaps(轴承盖).Thethrustblockorthrustbearing(推力轴承),locatedattheaftendoftheengine,maybeintegral（整体的）with,orseparatefrom,thebedplate.*

5、Ontheflat(平的)uppersurfaceofthebedplatearearrangedanumberofA-shapedframesorentablatures(机架)whichmaybemanufacturedofcastironorfabricatedsteel(结构钢).Theframesaremountedonandboltedtothebedplatecrossgirders.AtthetopoftheA-framesthereisastrongcastironframe（框架结构）calledt

6、hescavengingairbox,whichisbuiltofanumberofsectionsprovidedwithvertical（垂直）flanges(法兰)enablingthemtobeboltedtogethertoformablockfor1-3cylindersinfrontofthechaintransmission,andablockwith4-6cylindersaftofthechaintransmission.Thechaintransmission,formingtheconnecti

7、onbetweenthecrankshaftandthecamshaft,isenclosedinacastironcasing（盒，箱体）knownasthechaindrivecasing.CylindersandCoversOntopofscavengingairboxismountedastrongcastironframeforeachcylinder.Theseframesareknownascylinderblocks（汽缸体）orcoolingjackets(冷却水套),whichareprovided

8、withverticalflangesenablingthemtobeboltedtogetherintheforemostandaftmostgroupsinthesamewayasthescavengingairboxes.Thebedplate,framesandcylinderblocksaresecuredtogethe