液压专业毕业设计外文翻译(有译文、外文文献)值得收藏哦!.doc

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1、外文原文：TheAnalysisofCavitationProblemsintheAxialPistonPumpshuWangEatonCorporation,14615LoneOakRoad,EdenPrairie,MN55344Thispaperdiscussesandanalyzesthecontrolvolumeofapistonboreconstrainedbythevalveplateinaxialpistonpumps.Thevacuumwithinthepistonborecausedbytherisevolumeneedstobecompensatedbythe

2、flow;otherwise,thelowpressuremaycausethecavitationsandaerations.Intheresearch,thevalveplategeometrycanbeoptimizedbysomeanalyticallimitationstopreventthepistonpressurebelowthevaporpressure.Thelimitationsprovidethedesignguideofthetimingsandoverlapareasbetweenvalveplateportsandbarrelkidneystocon

3、siderthecavitationsandaerations._DOI:10.1115/1.4002058_Keywords:cavitation,optimization,valveplate,pressureundershoots1IntroductionInhydrostaticmachines,cavitationsmeanthatcavitiesorbubblesforminthehydraulicliquidatthelowpressureandcollapseatthehighpressureregion,whichcausesnoise,vibration,an

4、dlessefficiency.Cavitationsareundesirableinthepumpsincetheshockwavesformedbycollapsedmaybestrongenoughtodamagecomponents.Thehydraulicfluidwillvaporizewhenitspressurebecomestooloworwhenthetemperatureistoohigh.Inpractice,anumberofapproachesaremostlyusedtodealwiththeproblems:(1)raisetheliquidlev

5、elinthetank,(2)pressurizethetank,(3)boostertheinletpressureofthepump,(4)lowerthepumpingfluidtemperature,and(5)designdeliberatelythepumpitself.Manyresearcheffortshavebeenmadeoncavitationphenomenainhydraulicmachinedesigns.Thecavitationisclassifiedintotwotypesinpistonpumps:trappingphenomenonrela

6、tedone(whichcanbepreventedbytheproperdesignofthevalveplate)andtheoneobservedonthelayersafterthecontractionorenlargementofflowpassages(causedbyrotatinggroupdesigns)inRef.(1).Therelationshipbetweenthecavitationandthemeasuredcylinderpressureisaddressedinthisstudy.EdgeandDarling(2)reportedanexper

7、imentalstudyofthecylinderpressurewithinanaxialpistonpump.Theinclusionoffluidmomentumeffectsandcavitationswithinthecylinderborearepredictedatbothhighspeedandhighloadconditions.AnotherstudyinRef.(3)providesanoverviewofhydraulicfluidimpactingont