宝马格 液压回路培训资料 英文.pdf

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HydraulicHydraulicCircuitsCircuits

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FAYATGROUPHydraulicCircuits

Openloopcircuit,Closedloopcircuit,

Typicalfeaturesofopenloopcircuitare:Typicalfeaturesofclosedloopcircuitsare:

1)Suctionlines1)Directionalvalves

Largediameters,smalllengthsSmallsizesforpilotoperation

2)Directionalvalves2)Filter/coolers

SizesdependentonflowSmallopeningstoflow/smallsizes

3)Filters/coolers3)Tanksize

Cross–sectionalareas/sizesdependentonSmall–determinedonlybyflowofauxiliarypumps

flowflowandandsystemsystemflowflow

4)Tanksize4)Speeds

Multipleofmax.pumpflowinlitresHighlimitsduetoanti–cavitation

5)Pumparrangement5)Arrangement/installationposition

NexttoorunderthetankAny

6)Drivespeeds6)Drive

LimitedbyamountofsuctionCompletelyreversiblethroughzeroposition

7))Unloadingginthereturnlineviavalves7))Supppportofloads

Viadrivemotor

8)Returnofbrakingenergy

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