卡特312c挖机液压原理图.pdf

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1、RENR5514-01FLUIDPOWERSYMBOLSSeptember2003BASICCOMPONENTSYMBOLSMAINAUX.PUMP:VARIABLEandPUMPorMOTORFLUIDCONDITIONERSPRINGCONTROLVALVESRESTRICTIONLINERESTRICTION2-SECTIONPUMPPRESSURECOMPENSATED(FIXED)RBL2VARIABILITYSPRINGLINERESTRICTIONPRESSUREHYDRAULICPNEUMATICLINERESTRICTION(ADJ

2、USTABLE)(VARIABLE)COMPENSATIONENERGYTRIANGLES(VARIABLEandPRESSURECOMPENSATED)MRVALVESVALVEENVELOPESVALVEPORTS34NRLPTAbL6bL5bR4bR5ONEPOSITIONTWOPOSITIONTHREEPOSITIONTWO-WAYTHREE-WAYFOUR-WAYbL4bL3bL2bL1bR1bR2bR3CONTROLVALVESCHECKVALVESABABPPPSWRBr3PTPTNORMALPOSITIONSHIFTEDPOSITIO

3、NINFINITEPOSITIONBASICSYMBOLSPRINGLOADEDRBL4RBL3MEASUREMENTROTATINGSHAFTSCLa2PRESSURETEMPERATUREFLOWUNIDIRECTIONALBIDIRECTIONALFLUIDSTORAGERESERVOIRSbL4bL3bL2bL1bR1bR2bR3312CExcavatorVENTEDPRESSURIZEDRETURNABOVEFLUIDLEVELRETURNBELOWFLUIDLEVEL33PBR320HydraulicSystemCOMBINATIONCO

4、NTROLSRBL4dB1PB1PBR3PPPSWRBL3BL2CBA1-UPSOLENOIDSOLENOIDSOLENOIDSOLENOIDandSERVOTHERMALDETENTorMANUALandPILOTPILOTorMANUALBR3FA1CAE1-UPMANUALCONTROLSYMBOLSBRCBR2ARCBL1BR1BNN1-UPdA1BL4BL3LCb1LCsLCPa1FDS1-UPPUSH-PULLLEVERGENERALMANUALPUSHBUTTONPEDALSPRINGLCa2LCBRCBT1-UPPILOTCONTRO

5、LSYMBOLSLCORELEASEDPRESSUREREMOTESUPPLYPRESSUREAL4AL3AL2AL1AR1AR2BWH1-UPLCa1DBN1-UPAR3EXTERNALRETURNINTERNALRETURNSIMPLIFIEDCOMPLETEINTERNALRAL3SUPPLYPRESSUREACCUMULATORSCROSSINGANDJOININGLINESHYDRAULICANDPNEUMATICCYLINDERSaL4aL3aL1aR1aR2aR3RAL4RAL2SPRINGLOADEDGASCHARGEDLINESCR

6、OSSINGLINESJOININGSINGLEACTINGDOUBLEACTINGHYDRAULICPUMPSHYDRAULICMOTORSINTERNALPASSAGEWAYS3228FIXEDVARIABLEDISPLACEMENTFIXEDVARIABLEDISPLACEMENTINFINITETHREETWODISPLACEMENTNON-COMPENSATEDDISPLACEMENTNON-COMPENSATEDPOSITIONINGPOSITIONPOSITION18151413191211UNIDIRECTIONALUNIDIRECT

7、IONALFLOWINONEPARALLELCROSSFLOWALLOWEDINBIDIRECTIONALBIDIRECTIONALDIRECTIONFLOWFLOWEITHERDIRECTION©2003CaterpillarPrintedinU.S.A.AllRightsReserved35313025249MainControlValvePAC50DR249DR6T-OUT(2)T-OUT(1)PSA148DR1DR5PSA247Pi2P-INPi1DR4P2P151PilotManifoldf06377HydraulicSchematic41

8、58-8235123MAINCONNECTORLINEPILOTLINEDRAINLINER/GR/G939