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ID:52361625
大小:1.09 MB
页数:24页
时间:2020-03-26
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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
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