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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

CRANKRODSYSTEMCRANKRODSYSTEMISTHEMAINMECHANISMSRECIPROCATINGINTERNALCOMBUSTIONENGINECRANKRODSYSTEMISREALIZINGWORKCYCLEENGINE,ANDCOMPLETETHEENERGYCONVERSIONMAJORSPORTSPARTSINDOINGWORKSTROKE,ITWILLFUELBURNINGTHEHEATENERGYPRODUCEDISTHEPISTONRECIPROCATINGMOTION,CRANKSHAFTROTATIONMOVEMENTINTOMECHANICALENERGY,FOREIGNPOWEROUTPUT;INOTHERSTROKE,RELIESONTHEROTATIONOFTHEFLYWHEELCRANKANDINERTIA,THROUGHTHECONNECTINGRODDRIVINGTHEPISTONMOVEMENTUPANDDOWN,TOCREATETHECONDITIONSFORTHENEXTTODOWORKTHEFUNCTIONOFTHECRANKRODSYSTEMCRANKRODSYSTEMROLEISTOPROVIDEBURNINGTHEPLACE,AFTERBURNINGFUELGASINTHEPISTONTOPROLEINFLATIONARYPRESSUREINTHEROTATIONOFTHECRANKSHAFTINTOTORQUE,ANDCONSTANTLYPOWEROUTPUT1WILLGASPRESSUREINTOCRANKSHAFTOFTORQUE2THERECIPROCATINGMOVEMENTOFTHEPISTONTOTHEROTARYMOTIONOFTHECRANKSHAFTTHECOMPOSITIONOFTHECRANKRODSYSTEMCRANKRODSYSTEMBYTHEBODYSGROUP,THEPISTONCONNECTINGRODGROUP,CRANKSHAFTFLYWHEELOFTHREEPARTS1THEBODYGROUPSTHECYLINDERBLOCK,CYLINDERCUSHION,THECYLINDER,ANDTHECRANKCASEOILSUMP2THEPISTONLINKAGEGROUPSTHEPISTON,PISTON,PISTONPINS,CONNECTINGROD3THECRANKSHAFTFLYWHEELTHECRANKSHAFTFLYWHEEL1THEGROUPTHEBODYISASKELETONOFTHEENGINE,ISTHEENGINEAGENCIESANDTHESYSTEMINSTALLATION,WHICHTHEFOUNDATION,THEINSTALLATIONOFALLTHEMAJORENGINEPARTSANDACCESSORIES,UNDERVARIOUSLOADTHEREFORE,THEBODYMUSTHAVETHEENOUGHSTRENGTHANDRIGIDITYTHECYLINDERBLOCKTHECYLINDERBLOCKISTHEENGINEOFALLAGENCIESANDSYSTEM,ISINTHEENGINEASSEMBLYWASONEOFTHEMOSTIMPORTANTCOMPONENTSTHECYLINDERBLOCKHAVEWATERCOOLEDAIRFILLEDTYPECYLINDERANDTHECYLINDERBLOCKWATERCOOLEDTHECYLINDERBLOCKINGENERALANDCASTINTEGRATIVECRANKCASETHECYLINDERBLOCKUPPERTOOKOUTALLCYLINDER,AIRCYLINDERSURROUNDINGCAVITYMUTUALCONNECTEDMAKEWATERSETSTHELOWERPARTISUSEDTOSUPPORTOFTHECRANKSHAFTCRANKCASETHECYLINDERBLOCKHAVEINLINE,VANDLEVELTOTHETHREEKINDSOFFORMS,INCARSANDVINLINECOMMONLYUSEDTWOTHELOWERPARTOFTHECYLINDERBLOCKSTRUCTUREGENERALTYPE,GANTRYGATE,ANDTUNNELTYPETHREEFORMSOFTHEAIRFILLEDTYPETHECYLINDERBLOCKANDTHECRANKCASEADOPTFISSIONSTYLESTRUCTURE,THECYLINDERBLOCKANDTHECRANKCASESEPARATE,THENASSEMBLEDINTOCASTINGTOGETHERTHECYLINDERBLOCKANDTHESURFACEOFCYLINDERHEADCASTHASMANYHEATSINKTOENSURESUFFICIENTHEATDISSIPATION,THECYLINDERBLOCKOFMATERIALSWITHGREYCASTIRON,INORDERTOIMPROVETHEGENERALTHEWEARRESISTANCEOFTHECYLINDER,ANDSOMETIMESINCASTIRONTOADDASMALLAMOUNTOFALLOYELEMENTSSUCHASNICKEL,MOLYBDENUM,CHROMIUM,PHOSPHORUS,ETCBUT,INFACT,BESIDESTHEPISTONANDCYLINDERWALLSURFACEWITHTHEOTHERPART,TOREQUESTISNOTHIGHWEARRESISTANCEINORDERTOTHEECONOMYOFTHEMATERIAL,WIDELYUSEDTHECYLINDERINSERTEDINTOTHECYLINDERLINERTOFORMINCYLINDERSURFACESO,CYLINDERLINERWEARRESISTANCECANBETTERALLOYCASTIRONORSTEELALLOYMANUFACTURE,INORDERTOPROLONGTHESERVICELIFE,ANDCYLINDERCYLINDEROFLOWPRICECANBEUSEDORDINARYCASTIRONANDALUMINUMALLOYMATERIALSMANUFACTURINGTHECYLINDERLINERISDRYANDWETTYPETWOKINDSDRYCYLINDERLINEROUTSIDESURFACEARENOTDIRECTWITHCOLDWATERCONTACT,THEWALLTHICKNESSGENERALFOR13MMONTHESURFACEOFTHECYLINDERLINERANDASSEMBLYOFTHECYLINDERBODYSURFACEUSINGINTERFERENCEFITTEDWETCYLINDERLINERSURFACEDIRECTLYCONTACTWITHTHECOOLINGWATERANDGOODCOOLINGEFFECTTHEWALLTHICKNESSTHANDRYCYLINDERLINER,GENERALLYFOR5TO9MMCYLINDERHEADTHECYLINDERHEADISTHEMAINPURPOSEOFTHEPISTONANDCYLINDER,CLOSEDTHETOPANDCYLINDERWALLSTOGETHERMAKEUPTHECOMBUSTIONCHAMBERGENERALWATERCOOLEDENGINEWITHINTHECYLINDERHEADCASTAJACKET,UNDERTHECYLINDERHEADENDANDCYLINDERFORTOPCORRESPONDINGTOTHEWATERJACKETISTHESAME,USEWATERTOCOOLTHECIRCULATIONOFTHECOMBUSTIONCHAMBERWALLOFHIGHTEMPERATURE,SUCHASPART;THEAIRFILLEDTYPEENGINECYLINDERHEADONMANYHEATSINK,CASTBYINCREASINGHEATAREATOREDUCETHETEMPERATUREOFTHECOMBUSTIONCHAMBERTHEENGINECYLINDERHEADSHALLHAVETHEEXHAUSTPORTACATHETERHOLEANDINTOTHEEXHAUSTPASSAGE,ETCTHEGASOLINEENGINECYLINDERHEADALSOSHOULDHAVETHESPARKPLUGHOLE,ANDALSOHASINSTALLEDTHEDIESELENGINEINJECTORDOHOLESCYLINDERCUSHIONTHECYLINDERANDTHECYLINDERBLOCKWITHCYLINDERLINER,THEBETWEENTHEROLEISTOENSURETHATTHECYLINDERANDTHECYLINDERBLOCKOFBETWEENSEALEDTOPREVENTLEAKAGEOFCOMBUSTIONCHAMBER,WATERLEAKINGOILPANISTHEOILPANISMAINEFFECTISTOBESTOREDANDSEALEDTHECRANKCASEOILTHEOILPANISFORCEISSMALL,GENERALLYUSESTHETHINSTAMPINGSTEELANDINTO2THEPISTONSCONNECTINGRODGROUPTHEPISTONCONNECTINGRODGROUPOFPISTON,PISTON,PISTONPINS,CONNECTINGROD,CONNECTINGRODBEARINGSETCPISTONTHEPISTONISTHEROLEOFCYLINDERHEAD,CYLINDERWALLSWITHTOGETHER,ANDHEIRSOFTHECOMBUSTIONCHAMBEROFGASCYLINDERPRESSURE,THROUGHTHEPISTONPINSWILLFORCETOTHECONNECTINGROD,INORDERTOPROMOTETHEROTATIONOFTHECRANKSHAFTTHEPISTONCANBEDIVIDEDINTOTHEHEAD,RINGGROOVEDEPARTMENTANDTHESKIRTTHREEPARTSTHEPISTONHEADTHEPISTONISPARTOFTHECOMBUSTIONCHAMBER,ITSSHAPEDEPENDSONTHEFORMOFTHECOMBUSTIONCHAMBERCOMMONPISTONHEADSHAPEHASFLATTENEDTYPE,CONCAVEANDCONVEXROOFTOPTYPETYPE

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