滑阀节流棱边圆角对流量特性影响的三维模型仿真

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1、机床与液压Jun．2013HydromechatronicsEngineeringVo1．41No．12DOI：10．3969／j．issn．1001—3881．2013．12．002NumericalSimulationStudyontheInfluenceofArris-edgeFilletofSpoolValveonFlowCharacteristicsWANGDongwei，YEZhengmaoSchoolofMechatronicsEngineering，HarbinInstituteofTechnolog

2、y，Harbin150001，ChinaAbstract：Theflowcharacteristicofthespoolvalveafectstheperformanceoftheservovalve．U·singFluent，thispaperdiscussesthefollowingfourcases：theidealspoolvalve，thespoolvalveswitharris-edgefilletsof5，8and10tam．Theefectsofdiferentfilets0nthevalve’sfl

3、owcharac-teristicsarediscussedandacorrectionformulafortheflowcoeficientofidealspoolvalveispro-posedbypolynomialapproximationofthesimulationresults．Keywords：flowcharacteristics，Fluent，theworkingarris-edgefilletTheresearchontheflowcharacteristicsofspool1．Introduc

4、tionvalveisquitedifficultforthefollowingtworeasons：①Itisdifficulttodetectaopeningofonlyafewmi-Athree—stageelectro—hydraulicselwovalveisthecronsintheexperiment．(Thetheoreticalformulakeycomponentofhighpowerelectro—hydraulicservoisderivedfromthesimplifiedmodelandt

5、husthefor．controlsystems．Becauseofitsoutstandingfeaturesmulaisnoteffectiveincertaincircumstancesl5f．suchaslargecapacity，high-frequencyresponse，Numericalsimulationcanovercometheseshortcom．highresolutionandhighreliability，etc，three-stageings，anditisrelativelyeasy

6、toapply，sothispaperelectro．hydraulicservovalveshavebeenwidelyusedstudiestheeffectoftheworkingarris—edgefilletofinmanyhigh-performanceapparatusincluding6一DOFvalvespoolontheflowcharacteristicsusingFluent．motionsimulators．vibratingtablesandloadsimula-tors，etc『1—2]

7、．Generally，themainvalveofa2．Theoreticalformulaoftheslidevalvethree—stageelectro．hydraulicservovalveisaspoolflowcharacteristicsvalve．anditsfluidflowrateiscontrolledbychan．gingtheflowareaofthevalveportbytherelativemo—Theidealmodelofthespoolvalveisshownintionofthe

8、valvespoolandsleeve『3]．Fig．1，itshowsthat，asidefromthetwoleftandfightTheflowcharacteristicofthespoolvalveaffectscontrolchannels，thevalvehasfourchannelscon-theperformanceofthe