液压计算公式

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1、FluidPowerFormulaTheseFormulaCoverAllFluidPowerApplicationsInThisManualForComputerProgramsToWorkProblemsBySimplyFillingInTheBlanksSeeYourLocalFluidPowerDistributorManyCompaniesWebSiteOrCDAlsoSeeTheFluidPowerDataBookPackagedWithThisManualForChartsandOtherFluidPowerI

2、nformationFluidPowerFormulaMiscellaneousFluidPowerFormulaFluidPressure=Force(Pounds)2UnitArea(in)VelocityThroughPipesinFeet/Second(FPS)=0.320833xGPM(FlowThroughConduit)2InternalAreaofConduit(in)33ExtraHydraulicOilRequiredtoFillaVolume(in)=PSIxVolume(in)250,000Based

3、on½of1%/1,000PSICompressibilityofaFluid=1BulkModulusoftheFluid3SpecificGravityofaFluid=Weightof1ftoftheFluid3Weightof1ftofWaterOrificeFlowPressureDrop(∆P)AcrossanOrifice=(FlowinGPM(Q)xS2G)Cd=OrificeCoefficient229.81xdx∆PFrom0.61-0.98AccordingtoOrificeLengthandShape

4、.0.65isaNominalFigureFlowGPM(Q)AcrossanOrifice=29.81xC2dxd∆PSGSG=SpecificGravityRange.87-.90ForHyd.Oil2DiameterofanOrificed=FlowinGPM(Q)xSG.88isaNominalFigure29.81xCdx∆PCircleFormula:2CircumferenceofaCircle=πD(3.1416xDiameterSquared)22222AreaofaCircle(in)=πr(3.1416

5、xradius)ORπDOR.7854D4VolumeFormula:32Volume(in)ofRoundObject=Area(in)xLengthVolumeofSquareorRectangularObject=LengthxWidthxDepthTubeBurstCalculations:2STBarlowFormulap=p=BurstPressurePSIDS=UltimateStrengthofTubeMaterial,PSIT=NominalWallThickness,InchesD=NominalODof

6、Tubing,InchesBoylesLaw:PV11=PV22P1=Pressure1Absolute.(GaugePressurePlus14.7)PV22P1=P2=Pressure2Absolute.(GaugePressurePlus14.7)V1PV11P2=V1=ActualGasVolumeatPressure1V2PV22V1=V2=ActualGasVolumeatPressure2P1PV11V2=P21FluidPowerFormulaMiscellaneousFluidPowerFormula(Co

7、nt’d.CharlesLaw:TV12=TV21T1=AbsoluteTemperatureofGasatVolume1(Temp.DF+459.7)TV21T1=T2=AbsoluteTemperatureofGasatVolume2(Temp.DF+459.7)V2V1=VolumeofGasatTemperature1TV12T2=V2=VolumeofGasatTemperature2V1TV12V1=T2TV21V2=T1GeneralGasLaw:PV11PV22=P1=Pressure1Absolute.(G

8、augePressurePlus14.7)TT12P2=Pressure2Absolute.(GaugePressurePlus14.7)PVT221P1=V1=ActualGasVolumeatPressure1TV21V2=ActualGasVolumeatPressure2PVT11