浅析密封槽结构形式对液压缸内泄漏的数值

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1、机床与液压Mar．2013HydromechatronicsEngineeringVo1．41No．6DOI：10．3969／j．issn．1001-3881．2013．06．015NumericalAnalysisaboutEffectoftheDifferentClearanceSealonHydraulicCylinderLeakageRateTANGJie，WANGLiwen，CHAIXiaoming。，LIUJingJ．AviationGroundSpecialEquipmentsResearchB

2、ase，CivilAviationUniversityofChina，Tianjin300300，China2．HebeiSteelGroupChengdeBranch，Chengdeo67lo2，China．Abstract：Inthispaper，accordingtotheinternalleakageofthelow-frictionhydrauliccylinder，ithasbeencomparedthattheleakagerateofthesealinggrooveofthethreedife

3、rentstructuresbyusingCFDsoftware．Andtheoptimalstructureformoftheclearancesealisobtained．Therefore．thispaperprovidesabasisfortherationaldesignandselectionofthehydrauliccylindersea1．Keywords：sealinggroove，internalleakage，numericalanalysis，hydrauliccylinderAll

4、theworksmentionedaboveprovidethebasisfor1．Introductionthereasonabledesigningofclearanceseal[1]．Inthehydraulicsystem，theeficiencyofthehy．drauliccylinderiscrucia1．Usuallywecanusetheringsealandclearancesealtoimprovetheeficiency．Foracylinderwithclearanceseal，th

5、evolumetricefi—ciencywi11bedecreasedastheincreaseofworkingpressureandgap．Onthecontrary，themechanicalef-ficiencywillbejncreased．Therefore．accordingtothetheoryofenergyloss，thereisareasonableclearanceFig．1Low—frictionhydrauliccylinderandworkingpressurewhichcor

6、respondstotheoptimalefficiency．Simultaneously，thecylinderwi11become2．Theleakageoftheclearanceseallow—frictionastheexistenceofhydrauliccenteringforce(asshowninFig．1)．ClearancesealcylinderAsshowninFig．2，thebasiccauseofleakageiscanminimizefrictiontothemaximale

7、xtentandim—thepressuredifferencebetweenAandBsides．Theprovethemechanicaleficiency．ItwillalsoenhancepressuredecreasesfromP1toP2，andthepressurethelowspeedperformance．Therefore，creepingphe—dropisPP1一P2．Thepressuredropiscausedbynomenoncanbeavoided．frictionduring

8、themovementofliquid，whichisInthisarticle，CFDsoftwareisusedtoanalyzecalledflowresistanceforshort．Ifpartbisexposedtothehydrauliccylinderleakageofthreekindsofclear-atmosphere，thepressuredropisequaltothepr