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1、機床與液壓Dec．2012HydromechatronicsEngineeringVo1．40No．24DOI：10．3969／j．issn．1001-3881．2012．24．019TheCFDAnalysisofPilotTypeZeroSteady—stateErrorofWaterHydraulicOverflowValve’sFlowFieldHENGYang，LUOJing，TANXinping，ZHUGengyinFacultyofMechanicalandElectricalEngineering，K
2、unmingUniversityofScienceandTechnology，Kunming650500，ChinaAbstract：TheanalysismethodofCFD(ComputationalFluidDynamics)candescribethemotionofhydrauliccomponentsandpipeinfluidrapidlyandaccurately．Throughthesimulationanalysisoftheflowfield，theaspectsinflucingthedev
3、iceperformancecanbedirectlyobtained，whichprovidesbasisandmethodsforthestructureanalysisandsimulationofthecomponents．Keywords：pilottypewaterhydraulicoverflowvalve，zerosteady。stateerror，CFDanalysisofflowfield1．Introduction2．ThemainvalveflowfieldoftheCFDmodelestab
4、lishmentandtheparametersHydrostatictransmission．whichhasthehydrau—licpressurecontrollingvalveastheimportantcompo—Consideringtocavitation，vibration。etc．，innent，hasbecomeanimportantresearchdirectionofthispaper，thestructureofzerosteady—stateerrorwa—fluidpowettrans
5、missionandcontrolwithitsadvan—terhydraulicoverflowvalve．whichisthedesignedtageofnopollution，flameretardancy，goodeconomi—mainvalvestructure，ismorecomplexthanthatofpi—ty，andextensivesources[1]．Traditionalpressurelotvalve．a(chǎn)ndalso．theflowfieldmodelisrelativelycontr
6、ollingvalveisthesteady—stateerrorvalve．hav—complicated．So．a(chǎn)3modelisusedtoestablishtheingalowaccuracyofconstantpressure．Inaddition，fluidmodel『4]．Autodesk．Inventorisusedtoestab．hydraulictransmissiondefectswithlargeleakage，1ishedthe3dflowmodelofthemainvalvecoreint
7、hepoorlubrication，easycorrosionandsoon[2]．openstateof2．5mm，asshowninFig．1andFig．Therefore，theresearchonhowtoimprovetheper—2．Theinletpressureis32MPa，andtheoutletpres—formaneeofhydraulicpressurevalvehasanimportantsureis1．05×10Pa『5—6]．theoreticalandpracticalengine
8、eringvalue．Thispa—perfocusontheCFDanalysisoftheflowfieldaroundthepilotandpowerleversofthezerosteady—-stateer-Forwaterhydraulicoverflowvalve．Theflowfieldmodelisestablished．a(chǎn)n
