外文翻译--液压传动系统设计与计算.doc

外文原文HydraulicActuationSystemDesignandComputationAbstractAcompletehydraulicsystemconsistsoffourparts,namely,dynamiccomponents,theimplementationofcomponents,controlcomponentsauxiliarycomponents(attachment).Hydraulicsystembythesignalcontrolandhydraulicpoweriscomposedoftwoparts,signalcontrolofsomepartsofthehydraulicpowerusedtodrivethecontrolvalvemovement.Partsofthehydraulicpowercircuitdiagramway,toshowthedifferentfunctionsoftheinterrelationshipbetweencomponents.(Intheanalysisanddesignoftheactualtask,thegeneralblockdiagramshowstheactualoperationofequipment.Hollowarrowsindicatesignalflow,whilethesolidarrowsthatenergyflow.Basichydrauliccircuitoftheactionsequence-Controlcomponents(reversingvalve2)andthechangetotheresetspring,theimplementationofcomponents(double-actinghydrauliccylinder)outandback,aswellasthereliefvalveopeningKaiandturnoff.Fortheimplementationofcomponentsandcontrolcomponents,presentationsarebasedonthecorrespondingcircuitdiagramsymbols,whichalsointroducereadymadecircuitdiagramsymbols.1isclearaboutthedesignrequesttocarryontheoperatingmodeanalysis.Whendesignhydraulicsystembelow,firstshouldbeclearaboutthequestion,andtakesitasthedesignbasisMainengineuse,technologicalprocess,overalllayoutaswellastohydraulicgearpositionandspatialsizerequest;Themainenginetothehydraulicsystemperformancerequirement,liketheautomaticity,thevelocitymodulationscope,themovementstability,thecommutationpointingaccuracyaswellastherequestwhichtothesystemefficiency,warmpromotes;Hydraulicsystemworkingconditions,liketemperature,humidity,vibrationimpactaswellaswhetherhassituationandsooncorrosivenessandheat-sensitivematerialexistence.Intheaboveworkfoundation,shouldcarryontheoperatingmodeanalysistothemainengine,theoperatingmodeanalysisincludingthemovementanalysisandthemechanicalanalysis,alsomustestablishtheloadandtheoperatingcyclecharttothecomplexsystem,fromthisunderstoodthehydrauliccylinderortheoilmotorloadandthespeedchangeasnecessarytherule,belowmakestheconcreteintroductiontotheoperatingmodeanalysi