油封机械密封旋转轴漏油唇形密封圈新材料石棉纸防油材料漏油工艺整体设计规划.docx
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油封机械密封旋转轴漏油唇形密封圈新材料石棉纸防油材料漏油工艺整体设计规划.docx
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油封机械密封旋转轴漏油唇形密封圈新材料石棉纸防油材料漏油工艺整体设计规划
Influenceofanappliedelectricfieldonthetorqueofrotarylipsealsonmetalshafts.PartII:
Effectsofoiltype
TribologyInternational
TheexperimentalresultsarepresentedofresearchonthetribochargingofselectedengineoilsandontheeffectofanauxiliaryexternalDCelectricfieldontheworkofrotarymachinery.Thereexistsaneffectofthetypeofoil,itstemperature,andtheelectricfieldonthebrakingtorqueofrotatingpartssuchasshafts,crankshafts,etc.sealedwithlipseals.Theresearchwasespeciallyaimedatthepossibilityofreductioninthetorqueunderexternalelectricfieldsfordifferentengineoils.ToobtaintheauxiliaryelectricfieldtheDCvoltagewasappliedbetweenthestiffeningringofafluorocarbonlipsealandtherotating,earthedshaftinthemetalshaft–oilfilm–lipsealsystem.Themeasurementsofthetorquewereperformedundersteadystateconditionsforgivendifferentoiltemperatures,angularshaftvelocities,andvoltages;alsothreedifferentoilswereused.Itwasfoundthatforthelipsealundertestthenegativevoltageappliedproducedabeneficialeffectonthetorquedependingonthetypeofoils.
ArticleOutline
1.Introduction
2.Researchfacilityandprocedure
3.Resultsofexperiments
3.1.Materialstested
3.2.Measurements
3.3.Resultsandtheirdiscussion
3.3.1.OilA
3.3.2.OilB
3.3.3.OilC
3.4.Physicalinterpretationoftheresults
3.4.1.WithouttheexternalDCelectricfield
3.4.2.WiththeexternalDCelectricfield
4.Concludingremarks
Acknowledgements
References
金属件油封油的类型分类与密封工艺选择
Tribocharginginarotatingshaft–oil–sealsystemandtheeffectofanexternalelectricfield
JournalofElectrostatics
旋转件-冷却油-油封系统和密封效果分析扩展到外部环境研究
TheresultsareshownoftestsontheeffectofanauxiliaryexternalDCelectricfieldonthebrakingtorqueofarotatingshaft.Experimentswerecarriedoutonasimplifiedmodelofanengineinwhoseinteriorametalshaftrotatedwithgivenangularvelocities.Theshaftwaslubricatedwithdifferentoilsproducinganoilfilmbetweentheshaft'ssurfaceandalipseal.Theinfluenceofdifferentoiltemperaturesonthebrakingtorquewasalsoexamined.TheresultsarepresentedhereforfreshPolishoilLOTOS15W40andalipsealdiameterof88 mm.AnincreaseinthenegativeDCvoltageappliedbetweentheshaftandstiffeningringofthelipsealcausedareductioninbrakingtorque.
ArticleOutline
1.Introduction
2.Descriptionofexperiments
2.1.Experimentalset-up
2.2.Materialstested
2.3.Experimentalproceduresandconditions
2.4.Experimentalresultsanddiscussion
3.Concludingremarks
Acknowledgements
References
Influenceofanappliedelectricfieldonthetorqueofrotarylipsealsonmetalshafts.PartI:
Effectsoflipsealtype
旋转轴密封圈的类型选择方法配套表电力拖动与工业传动领域金属工件漏油预防的常用设计
TribologyInternational
ThepaperpresentssomeresultsofexperimentsonthetribochargingofselectedengineoilandontheeffectofanauxiliaryexternalDCelectricfieldontheworkofmachineswhichcontainrotatingpartssuchasshafts,crankshafts,etc.TheresearchwasespeciallyaimedatthebrakingtorqueofarotatingmetalshaftsealedwithalipsealandapossibilityofreductioninthetorqueunderexternalDCelectricfields.DCvoltagewasappliedbetweenthestiffeningringoffourdifferentlipsealsundertestandarotating,earthedshaftinametalshaft-oilfilm-lipsealsystem.Therelationshipsofthetorquetothevoltageofpositiveandnegativepolaritieswereestablishedonthebasisofmeasurementsofthetorqueundersteady-stateconditionsforaconstantoiltemperatureandgivendifferentangularshaftvelocities.Ingeneral,itwasfoundthatpositiveandnegativeDCelectricfieldsproduceadverseeffectsonthetorquedependingonthetypeofoilsandonthematerialofwhichthelipsealsweremade.Inonlyonecase,thetorquedecreasedwiththeincreasingabsolutevalueofthenegativevoltageapplied.
ArticleOutline
1.Introduction
2.Experimentalmethodsandset-up
2.1.Methods
2.2.Experimentalset-up
3.Resultsofexperiments
3.1.Materialstestedandexperimentalprocedure
3.2.Experimentalresultsanddiscussion
3.2.1.Black85 mmdiameterfluorocarbonlipseal
3.2.2.Brown85 mmdiameterfluorocarbonlipseal
3.2.3.Black88 mmdiameterfluorocarbonlipseal
3.3.Summary
4.Concludingremarks
Acknowledgements
References
Tribocharginginarotatingshaft–oil–lipsealsystemfordifferentenginebaseoils,additive,andtheirblends
JournalofElectrostatics
Thepaperpresentstheresultsofexperimentsontribochargingofdifferentmineral,semisynthetic,andsyntheticbaseoilsandtheirblendswithadditives.AnantiwearadditiveZDDP(zincdialkyldithiophosphate)istestedwhenaddedtobaseoilsindifferentpercentagesbyweight.Experimentsarecarriedoutonthespeciallybuiltexperimentalfacilitytobeasimplifiedmodelofanenginecrankcaseinwhoseinterioranearthedmetalshaftrotatesatgivenangularvelocities.Thepotentialofastiffeningringofalipsealismeasureddirectlywithanelectrometer.Thepotentialisameasureoftribocharginginarotatingshaft–oil–lipsealsystem,frictionjunction,andespeciallybetweenbothinterfaces:
shaftsurface–oilandoil–lipofalipseal.Theexperimentalresultsarepresentedintheformofsomecharacteristicsthatarerelationshipsofthepotentialinducedinthestiffeningringwithoil'stemperaturefordifferentangularshaft'svelocitiesandadditives,contents.Theoil'stemperaturerangesfrom60to110 °Candiscontrolledautomatically.Theangularvelocitiesofashaftusedare500and1500 rpm.Theadditivecontentsintheblendswithdifferentbaseoilsare0.1and0.2%.Thepurebaseoilsofallthetypesandsomelipsealsarealsoexamined.Moreover,theinfluenceofanexternalDCelectricfieldappliedbetweentheearthedshaftandthestiffeningringonthebrakingtorqueoftheshaftisexaminedforarangeoftemperaturesofthepureoilsandtheirblendswiththeadditiveused,angularvelocities,andadditivecontents.TheelectricfieldisproducedwhileapplyingthehighDCvoltageofbothpolaritiesbetweentheshaftandthering.Theabsolutevalueofthevoltageisinarangefrom500to1500 V.
ArticleOutline
1.Introduction
2.Teststands,materialstested,andmeasurements
2.1.Experimentalset-upandmeasuringsystems
2.2.Materialstestedandmeasurementprocedure
2.3.Uncertaintyofthebrakingtorqueandpotential
3.Experimentalandinterpretationofresults
3.1.Naturalcharging
3.2.DCexternalelectricfield
4.Concludingremarks
Acknowledgements
References
Analysisofflowfieldaroundaribbedhelixlipseal
Inthisstudy,adirectnumericalsimulationmodelhasbeendevelopedtoelucidatethepumpingmechanismofaradiallipsealwithhelicalribs.Theflowfieldaroundthecontactregionbetweentheseallipandtheshaftsurfaceintheenvironmentofapumping-ratetestrig,wherebothairandoilsidesarefilledwithoilinitially,wassimulated.Thestreamlinepatternandpressurefieldaroundtheseallipwereexamined.Complicatethree-dimensionalstreamlinetopologywasdepicted.Ontheairside,highpressuresbuiltuponthewindwardfacesofribbedhelicesnexttotheliphelpingtopumpoilbacktothesump.Thevortexgeneratednexttothelipontheoilsiderotatessuchtocreateaninwardpumpingeffecttoo.Thepumpingrateswerecalculatedatshaftspeeds,rangingfrom2000to6000 rpm,andcomparedtothemeasuredvaluesfromthetestrig.Goodagreementwasobserved.Bothcalculatedandmeasuredpumpingratesincreaseastheshaftspeedincreases.ThecurrentresultsdemonstratethepromisingapplicationofCFDinthedesignofradiallipseals.
ArticleOutline
1.Introduction
2.Experimentalapparatusandtestspecimen
3.Theoreticalanalysis
3.1.Model
3.2.Fluidmechanicsofsealingflowforaribbedhelixlipseal
4.Resultsanddiscussion
5.Conclusions
References
Interpretationoftheresultsofresearchontribocharginginarotatingshaft–oil–lipsealsystem
旋转工件-油料-唇形密封系统的机理及其效用/工作效果分析阐述
Arotatingshaft,rotarylipseal,andoilcreatingafilmbetweenthesurfacesofashaftandofalipofthesealsetsupasystem,whichisrelativelysimplegeometrically,butcomplexphysicallyandelectrochemically.Suchasystemischaracteristicofallmachinery,engines,etc.whererotatingpartsandsealsoccur.Intheexperimentsandtestsperformedtodatedifferentrealcommercialmotoroils,originalbaseoils,additivestobaseoils(antiwearandextremepressureadditives),lipseals,andshaftswithdifferentroughnesshavebeenusedforarangeofoiltemperaturesandshaftangularvelocities.Tribochargingintheinterfacialsystem:
rotatingshaft–oil–lipseal(thefrictionjunction)isobservedandanalysed.OtherexperimentswereperformedtocompensatefortheelectricfieldgeneratedinthesystemapplyinganexternalDCelectricfieldandtofinditseffectonfrictionandthebrakingtorqueoftheshaft.Theresultsshowthattribochargingcanexertinfluenceonthebrakingtorqueofarotatingshaft.Thereductionof thebrakingtorqueundertheactionofanexternalDCelectricfieldisalsoobserved.Thesimilar experimentsarerepeatedwiththeuseofpurebaseoilsandadditivesincludingzincdialkyldithiophosphate(ZDDP).TribochargingisevidentinthecaseofpurebaseoilsandwhentheseareblendedwithZDDP.TheexternalDCelectricfieldalsoreducesthebrakingtorquewhileapplyingtheDCvoltagetothesystem.Heretheauthorstrytointerprettheformerandlastresearchresultsintheirphysicalaspectandtoanswersomequestions.
ArticleOutline
1.Intr
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