密封槽结构形式对液压缸内泄漏的数值分析.pdf

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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．AviationGroundSpecialEquipmentsResearchBase，CivilAviationUniversityofChin

2、a，Tianjin300300，China2．HebeiSteelGroupChengdeBranch，Chengdeo67lo2，China．Abstract：Inthispaper，accordingtotheinternalleakageofthelow-frictionhydrauliccylinder，ithasbeencomparedthattheleakagerateofthesealinggrooveofthethreediferentstructuresbyusingCFDsoftware．Andtheoptimalstructureformofthecl

3、earancesealisobtained．Therefore．thispaperprovidesabasisfortherationaldesignandselectionofthehydrauliccylindersea1．Keywords：sealinggroove，internalleakage，numericalanalysis，hydrauliccylinderAlltheworksmentionedaboveprovidethebasisfor1．Introductionthereasonabledesigningofclearanceseal[1]．Inth

4、ehydraulicsystem，theeficiencyofthehy．drauliccylinderiscrucia1．Usuallywecanusetheringsealandclearancesealtoimprovetheeficiency．Foracylinderwithclearanceseal，thevolumetricefi—ciencywi11bedecreasedastheincreaseofworkingpressureandgap．Onthecontrary，themechanicalef-ficiencywillbejncreased．There

5、fore．accordingtothetheoryofenergyloss，thereisareasonableclearanceFig．1Low—frictionhydrauliccylinderandworkingpressurewhichcorrespondstotheoptimalefficiency．Simultaneously，thecylinderwi11become2．Theleakageoftheclearanceseallow—frictionastheexistenceofhydrauliccenteringforce(asshowninFig．1)．

6、ClearancesealcylinderAsshowninFig．2，thebasiccauseofleakageiscanminimizefrictiontothemaximalextentandim—thepressuredifferencebetweenAandBsides．Theprovethemechanicaleficiency．ItwillalsoenhancepressuredecreasesfromP1toP2，andthepressurethelowspeedperformance．Therefore，creepingphe—dropisPP1一P2．

7、Thepressuredropiscausedbynomenoncanbeavoided．frictionduringthemovementofliquid，whichisInthisarticle，CFDsoftwareisusedtoanalyzecalledflowresistanceforshort．Ifpartbisexposedtothehydrauliccylinderleakageofthreekindsofclear-atmosphere，thepressuredropisequaltothepr