Servoenergysavingisoneofthemostfashionablewordsatpresent,andhowtochooseoilpumpbecomesacontradictiontopic.Somesaythatthevanepumpcan'tbeappliedtotheservosystembecauseitsspeedcan'tbelowerthan600rpm,andsomesayitcan'tbereversed.Turning,etc.,infact,theseareone-sidedviews.Asamanufacturerengagedintheproductionandapplicationofvanepumpsfordecades,itisnecessarytomakeacomprehensiveintroductiontotheperformanceofthevanepumpandhowitisappliedintheservofield.

First,thebladepumpcharacteristics:

Highpressure,lownoise,lowpressurepulsation,highvolumetricefficiency,etc.Thesearethemostbasicperformances,butmaynotbeknownforothercharacteristics.Thedatarelatedtothevanepumpandservoapplicationparametersareasfollows:

Takingourexistingproductsasanexample,wechoosethreeproductswiththesamedisplacementbutdifferentpressuresforcomparison.

S25V-19A-1C.

S25VQ-19A-1C.

S25VQH-19A-1C.

Thepressureswere17.5,21,26.5MPa,andthedisplacementwas60ml/rev.

1.Theminimumstartingspeedwhenthevanepumpcanbeoiled:

TheS25V-19A-1Cpumpis480-540rpmforoiling.

TheS25VQ-19A-1Cpumpis500-550rpmforoiling.

TheS25VQH-19A-1Cpumpis450-550rpmforoiling.

2.Theminimumpressureholdingspeedofthevanepumpatratedpressure:

TheS25V-19A-1Cpumpis130rpm.

TheS25VQ-19A-1Cpumpis100rpm.

TheS25VQH-19A-1Cpumpis90rpm.

Ifyoudonotpursuetheratedpressureorvolumetricefficiency,youcankeepmorethan50kgbetween50-100rpm.Thereasonwhythevanepumpcanalsobestressedatlowspeedisbecausetheextensionofthevaneonlyneedstobecentrifugallypulledoutwhenthepressureisjuststarted.Whenthepressureisestablished,thevaneprotrudesnotbytheheliumbutbythepressureatthebottomofthevane.Ejected,sothebladecanbeejectedaslongasthevanepumpisunderpressure.

3.Thefasteststoptimeforvanepumpflowzerooutput:

TheS25V-19A-1Cpumpis4seconds.

TheS25VQ-19A-1Cpumpis4seconds.

TheS25VQH-19A-1Cpumpis3.5seconds.

4.Themaximumspeedandmaximumflowvaluethatthevanepumpcanreach:

TheS25V-19A-1Cpumpis3000rpm:180liters.

TheS25VQ-19A-1Cpumpis3000rpm:180liters.

TheS25VQH-19A-1Cpumpis3000rpm:180liters.

5.Volumetricefficiencymeasuredbythevanepumpatratedpressure:

TheS25V-19A-1Cpumpis89-91%.

TheS25VQ-19A-1Cpumpis86-89%.

TheS25VQH-19A-1Cpumpis91-93%.

Second, Second,howYangavoidsshort:

Theminimumstartingspeedofthevanepumpishigherthanthatofthegearpumpplungerpump.However,accordingtoouractualmeasurement,thestartingspeedofthegearpumpwiththehighestapplicationrateisbetween350and450,noworse,becausetheoilpumphasthesameoilabsorptionconditions.Thevacuumdegreegeneratedbytheinternalrotationoftheoilpumpistheonlyconditionforoilabsorption.Differentoilpumpshavethesameprincipleexceptforthematerialsize,strengthandshapeoftheparts,buttheapplicationfieldsaredifferent.

Ifthevanepumpmustbestartedabove600rpm,the1000-1500rpmisideal,andthe50-150rpmlowpressureismaintained.Thisiscalledthehighspeedstartandlowspeedholdingpressureprinciple.Changesintheseconditionscanbeeasilyimplementedinthepediatricsoftheservosystem.

Regardingreverseparking,thisisanon-compliantapproach,suchasacarrunningathighspeed.Whetherthefastestparkingbrakeisahardindicatorfortestingthemodel,thereisnoneedtoreversethecartoachievetheparkingposition,andthefastreversecanalsodamage.Thesameistrueformechanicalcomponentsandoilpumps.Itisfundamentaltostoptheoilsupplytostoptheoperationoftheequipment.Therearemanywaystoachievethisgoal,suchastransferringtheexcessflowtothebypasswhilerapidlyreducingthespeed.Itcanberealizedthatalthoughthemethodofreverseparkinghasachievedtheshortesttimeandzeroflow,theharddamagecausedtotheinternalpartsoftheoilpumpisinvisible,andanyoilpumpcannotwithstandthetorsionandreversal.Acceleratepartwearandaffectservicelife.

Thequickstopmadeaboveisanexperimentforthisrequirement.Thequickstopof3-5secondsisenoughtomeettheneedsoftheequipment.Itisnotnecessarytocareaboutthehalf-secondspeed.

Theminimumrequirementforstartingthespeedisalsounwise.Usingtheservocomputerprogramming,itcansolvetheproblemofhigh-speedstartoflow-speedpressurekeeping.Whydoyouwanttostartatalowspeed?Takealookatit.

Third,thebenefitsofthevanepumpappliedtotheservosystem:

1.Inadditiontolownoiseandsmallpressurepulsation,thevanepumphasmoreimportantpoints:maturetechnologyandlowproductprice.

2.Thepressureofthehighpressurevanepumpcanreach26.5MPa,whichiscomparabletotheplungerpump.

3.Bycomparingtheabovethreedifferentpressurelevelvanepumps,the25VQHserieshighpressurevanepumpisundoubtedlyoneofthemostidealoilpumps.Ifthepressureisnothigh,andtherearespecialrequirementsfornoise,thentheS25Vseriesvanepumpisthemostsuitableproduct.

4,thebladepumpproductsaremature,thetechnologyisexcellent,thepriceislow,thereisnoneedtodevelopanewvanepump.

Fourth,summary:

Intoday'senergy-savinghydraulicequipment,howtochooseandhowtoapplyitisreallytheEightImmortals.Thegearpump,vanepumpandplungerpumphavetheirowncharacteristics,butthegearpumpisnottheonlyone.Theapplicationofthevanepumpisverybroad.Theapplicationofthesub-bladepumpintheservofieldisjustthebeginning,anditispossibletodigoutnewfeatures,andtheworkersofthevanepumphavetoworkhard.