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外文翻译--曲柄连杆机构.doc

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外文翻译--曲柄连杆机构.doc

CrankrodsystemCrankrodsystemisthemainmechanismsreciprocatinginternalcombustionengine.Crankrodsystemisrealizingworkcycleengine,andcompletetheenergyconversionmajorsportsparts.Indoingworkstroke,itwillfuelburningtheheatenergyproducedisthepistonreciprocatingmotion,crankshaftrotationmovementintomechanicalenergy,foreignpoweroutputInotherstroke,reliesontherotationoftheflywheelcrankandinertia,throughtheconnectingroddrivingthepistonmovementupanddown,tocreatetheconditionsforthenexttodowork.ThefunctionofthecrankrodsystemCrankrodsystemroleistoprovideburningtheplace,afterburningfuelgasinthepistontoproleinflationarypressureintherotationofthecrankshaftintotorque,andconstantlypoweroutput.1willgaspressureintocrankshaftoftorque2thereciprocatingmovementofthepistontotherotarymotionofthecrankshaftThecompositionofthecrankrodsystemCrankrodsystembythebodysgroup,thepistonconnectingrodgroup,crankshaftflywheelofthreeparts.1thebodygroupsthecylinderblock,cylindercushion,thecylinder,andthecrankcaseoilsump2thepistonlinkagegroupsthepiston,piston,pistonpins,connectingrod3thecrankshaftflywheelthecrankshaftflywheel1.ThegroupThebodyisaskeletonoftheengine,istheengineagenciesandthesysteminstallation,whichthefoundation,theinstallationofallthemajorenginepartsandaccessories,undervariousload.Therefore,thebodymusthavetheenoughstrengthandrigidity.ThecylinderblockThecylinderblockistheengineofallagenciesandsystem,isintheengineassemblywasoneofthemostimportantcomponents.Thecylinderblockhavewatercooledairfilledtypecylinderandthecylinderblock.Watercooledthecylinderblockingeneralandcastintegrativecrankcase.Thecylinderblockuppertookoutallcylinder,aircylindersurroundingcavitymutualconnectedmakewatersets.Thelowerpartisusedtosupportofthecrankshaftcrankcase.Thecylinderblockhaveinline,Vandleveltothethreekindsofforms,incarsandVinlinecommonlyusedtwo.Thelowerpartofthecylinderblockstructuregeneraltype,gantrygate,andtunneltypethreeformsoftheairfilledtypethecylinderblockandthecrankcaseadoptfissionstylestructure,thecylinderblockandthecrankcaseseparate,thenassembledintocastingtogether.Thecylinderblockandthesurfaceofcylinderheadcasthasmanyheatsinktoensuresufficientheatdissipation,thecylinderblockofmaterialswithgreycastiron,inordertoimprovethegeneralthewearresistanceofthecylinder,andsometimesincastirontoaddasmallamountofalloyelementssuchasnickel,molybdenum,chromium,phosphorus,etc.But,infact,besidesthepistonandcylinderwallsurfacewiththeotherpart,torequestisnothighwearresistance.Inordertotheeconomyofthematerial,widelyusedthecylinderinsertedintothecylinderlinertoformincylindersurface.So,cylinderlinerwearresistancecanbetteralloycastironorsteelalloymanufacture,inordertoprolongtheservicelife,andcylindercylinderoflowpricecanbeusedordinarycastironandaluminumalloymaterialsmanufacturing.Thecylinderlinerisdryandwettypetwokinds.Drycylinderlineroutsidesurfacearenotdirectwithcoldwatercontact,thewallthicknessgeneralfor13mm.Onthesurfaceofthecylinderlinerandassemblyofthecylinderbodysurfaceusinginterferencefitted.Wetcylinderlinersurfacedirectlycontactwiththecoolingwaterandgoodcoolingeffect.Thewallthicknessthandrycylinderliner,generallyfor5to9mm.CylinderheadThecylinderheadisthemainpurposeofthepistonandcylinder,closedthetopandcylinderwallstogethermakeupthecombustionchamber.Generalwatercooledenginewithinthecylinderheadcastajacket,underthecylinderheadendandcylinderfortopcorrespondingtothewaterjacketisthesame,usewatertocoolthecirculationofthecombustionchamberwallofhightemperature,suchaspartTheairfilledtypeenginecylinderheadonmanyheatsink,castbyincreasingheatareatoreducethetemperatureofthecombustionchamber.Theenginecylinderheadshallhavetheexhaustportacatheterholeandintotheexhaustpassage,etc.Thegasolineenginecylinderheadalsoshouldhavethesparkplughole,andalsohasinstalledthedieselengineinjectordoholes.CylindercushionThecylinderandthecylinderblockwithcylinderliner,thebetweentheroleistoensurethatthecylinderandthecylinderblockofbetweensealedtopreventleakageofcombustionchamber,waterleaking.OilpanisTheoilpanismaineffectistobestoredandsealedthecrankcaseoil.Theoilpanisforceissmall,generallyUSESthethinstampingsteelandinto.2.ThepistonsconnectingrodgroupThepistonconnectingrodgroupofpiston,piston,pistonpins,connectingrod,connectingrodbearingsetc.pistonThepistonistheroleofcylinderhead,cylinderwallswithtogether,andheirsofthecombustionchamberofgascylinderpressure,throughthepistonpinswillforcetotheconnectingrod,inordertopromotetherotationofthecrankshaft.Thepistoncanbedividedintothehead,ringgroovedepartmentandtheskirtthreeparts.Thepistonheadthepistonispartofthecombustionchamber,itsshapedependsontheformofthecombustionchamber.Commonpistonheadshapehasflattenedtype,concaveandconvexrooftoptypetype.

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