扭矩过载保护器外文翻译.docx
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扭矩过载保护器外文翻译.docx
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扭矩过载保护器外文翻译
Torqueoverloadprotection
Valveelectricdeviceisusedtooperatethevalveandwasoneofthevalvesconnectedtothedevice.Thedeviceisdrivenbyelectricity,theirmotionprocesscanbestroke,torque,ortocontrolthesizeoftheaxialthrust.Asthevalveshouldbetheworkofelectricaldevicecharacteristicsandutilizationdependonthetypeofvalves,fittingsandvalvesregulatetheworkofthepipelineorequipmentlocation.Therefore,controlvalveelectricdevicetherightchoice;considerthepreventionofoverload(workingtorquehigherthanthecontroltorque)hasbecomeessentialtotheoccurrenceofaring.
Valveelectricdevicerightchoiceshouldbebasedon:
1.Operationtorque:
Operationtorqueistoselectthemainvalveelectricaldeviceparameters.Theoutputtorqueelectricactuatorvalveoperationshouldbethegreatestmomentof1.2~1.5times.2.OperationThrust:
thehoststructureofMOTORIZEDVALVEACTUATORthevalveelectricdevice,therearetwo,oneisnotconfiguredthrustplate,thistimedirectlytotheoutputtorque;theotherisequippedwiththrustplate,andthistimetheoutputtorqueofthevalvestemthroughthethrustdisknutisconvertedtotheoutputthrust.3.Numberofoutputshaftrotationcircle:
valveelectricactuatoroutputshaftrotationthenumberoflapsandthevalvenominaldiameter,stempitch,threadthefirstfewrelated,accordingtoM=H/ZScomputing(where:
Mfortheelectricalinstallationsshouldbetomeetthetotalnumberofrotatingring;Hofthevalveopeningheight,mm;Stostemtransmissionthreadpitch,mm;Ztostemthenumberofscrewheads.)4.StemDiameter:
Formulti-turntypevalvesforthenextshot,iftheelectricactuatorallowsthemaximumstemdiameterofthevalvestemcannotbedispensed,itcannotbeassembledintoelectricvalve.Therefore,theelectricaldevicehollowoutputshaftdiametermustbegreaterthanspecifiedunderthevalvestemdiameter.Forsomerotaryvalves,aswellasmulti-turnvalvesinthedarkbarvalve,althoughwithoutconsideringtheadoptionofstemdiameter,butshouldalsotakefullaccountofthematchingstemdiameterandkeywaysize,sothatworkcanbeassembled.5.OutputSpeed:
valveKai,closedfast,easytoproducewaterhammerphenomenon.Shouldthereforebeunderdifferentconditionsofuse,choosetheappropriateKaiandclosingspeed.6.Theinstallation,connectionmethod:
electricequipmentinstallationforverticalinstallation,theleveloftheinstallation,floorinstallation;connectionsasfollows:
Arethrustplate;stemthrough(Mingpolemulti-turnvalves);darkbarmulti-turn;withoutthrustdisk;stemisnotpassed;partoftherotationElectricdeviceiswidelyused,istoachieveproductionprogram-controlledvalves,automaticcontrolandremotecontrolcannotbealackofequipment,itsmainuseintheclosedvalve.Butwecannotignorethespecialrequirementsofvalveelectricdevice-mustbeabletolimitthetorqueoraxialforce.ValveElectricinstallationsareusuallylimitedtorqueCouplings.Whentheelectricaldevicespecificationisdetermined,thecontroltorqueisalsodetermined.Whileinapre-determinedperiodoftimetorunwhenthemotornormallydoesnotoverload.
However,ifthefollowingconditionssothatitcanbeoverloaded:
1.Powersupplyvoltageislow,arenotrequiredtorque,themotorstopsrotating.2.Mistakenlysetthetorquelimitadjustmentagencies,sothatitisgreaterthanstoptorque,generatedtoolargearesultofcontinuoustorque,themotorstopsrotating.3.Suchasthepointofactionasintermittentuseofheatgeneratedsavingsofup,morethantheallowabletemperatureriseofthemotor.4.Torquelimitforsomereason,institutionalcircuitfailure,sothattorqueistoolarge.5.Useofenvironmentaltemperatureistoohigh,relativetotheheatcapacityofthemotordown.Theaboveistheexcessivenumberofreasons,forthesereasonsshouldbegeneratedbymotoroverheatinginadvance,takingintoaccount,andtotakemeasurestopreventoverheating.Inthepasttoprotectthemotorwayistousefuses,overcurrentrelays,thermalrelays,thermostats,etc.,buttheseapproachesalsohavetheirprosandconsofthischangefortheelectricaldeviceloaddevices,isabsolutelyreliableprotectionmethodisnot.Mustthereforetakeallmethodscombinedapproach.However,astheloadoneachelectricaldeviceisdifferent,itisdifficulttoproposeaunifiedapproach.Inmostcases,butgenerally,youcanalsofindcommonground.
Overloadprotectiontakenbytheway,begroupedintotwotypes:
1.Changesininputcurrenttothemotortojudge;2.Tojudgetheheatofthemotoritself.Thesetwomethods,regardlessofthekindproductionSummarizeofmotorthermalcapacitymusttakeintoaccountthegiventimemargin.Ifasinglewaythatwillmaketheheatcapacitycharacteristicsofthemotorlineisdifficult.Therefore,over-loadshouldbeselectedaccordingtothereasonsfortheactioncanbeareliablemethod-combinationofcomplexwaysinordertoachieveacomprehensiveover-loadprotection.Rotorkelectricactuatormotor,itsembeddedinthewindingsinthemotorinsulationlevelconsistentwiththethermostat,whenthereachtheratedtemperature,motorcontrolloopwillbecutoff.Thermostatheatcapacityissmallinitself,anditstime-limitedfeaturesisthemotorheatcapacitycharacteristicsofthedecision,sothisisareliablemethod.
Thebasicmethodofoverloadprotectionare:
1.Continuousoperationofmotorjogoperation,oroverloadprotectionwithathermostat;2.Locked-rotorprotectionofmotorthermalrelay3.Pairsofshortcircuitfaultsusingfuseorovercurrentrelays.Valveelectricdevicetopreventoverloadoftherightchoiceandisverymuchrelatedandshouldpayattentionto.
InconsiderationofeconomicaspectslimitingtorquesisacontinuouschallengewhendevelopingTorqueLimitersasanoverloadprotection.Thenewgenerationofthebacklash-freeTorqueLimiters.Thenewgenerationofthebacklash-freeTorqueLimitershasbeendesignedforbeingusedinpower-transmissionandservoapplications.Importantrequirementssuchasbeing backlash-free,shortreactiontimesandlongservicelifehavebeenfurtheroptimized.Theconstructivebenefitisensuredthroughfastavailabilityofapplicationsafteracrash.
Forlimitedinstallations
Thefurtherdevelopmentandoptimizationofthealreadywellestablishedbacklash-freeTorqueLimiterseriesSKhasbroughtaboutanappropriatedesignforeachapplication.Thetransmittabletorquescanbeaccuratedefinedandset.Eveninregardtorestrictedinstallationspacenow,thecouplingsrepresentthelateststate-of-the-art. AreasofapplicationsoftheTorqueLimitersrangingfrom0.1to2,800Nmcanbefoundinanytypeofmechanicalengineering.HighlydynamicdrivesarebeingcontinouslyimprovedbytheuseofpresetTorqueLimiters.WhentheoverloadoccurstheTorqueLimitersdisengageinmilliseconds.ThemovementoftheActuationringcanbesensed,andusedtocontrolandshutdownthemachine.Immediateavailabillityofthemachineafterre-engagementoftheTorqueLimitercanbeassured.
Increasedeconomicefficiency
Optimizeddiscspringsandmaterialsadaptedtotheuseofthecouplingallowforthecompactandreliabledesign,betterperformanceandwermass.Alsoalongservicelifeandmaintenancefreeoperationareimporttantconsierationswhenselectingcouplings.
Smallercouplingscombinedwithahighertorquedensityadditionallyresultinacostadvantageduetosmallerdimensioning.
OnaveragethesizeoftheTorqueLimiterhasbeenreducedbyapprox.1/3comparedtootheravailableproducts.Thisresultsinareducedseparationofmassesincaseofacrashduetothereducedweightandasmallertechnicaldiameter.
Whencomparingthefacts,itisclearthatR+WdevelopsanddeliversthemostcompactTorqueLimitersavailableperiod.
Agreatvariety
TheadvantageofballdetentdesignTorqueLimitersistheseparationofthedriveandthedrivenelementsinmillisecondsincaseofanoverload.Easyhandlingreliabilityarefurtheradvantages.
Machinedesignswithlittleinstallationspaceordifficulttoaccessareasdohoweveroftenrequirespecialsolutions.TheR+Wrangefacilitatestheeasymodificationbymeansofamodularconcept.Thehubtypethatisappropriatefortheapplicationisselectedandintegratedfortheidealdesign.
Thepress-fitprinciplethathasbeendevelopedbyR+Wusestheaxialspringforceofthemetalbellowstopre-tensionataperedmalepartintothecorrespondingcounter-pieceslightlyaxially.Anaxialpre-tensioningofthemetalbellowsofonly0.2millimetersassurestheabsolutelybacklash-freetorquetransmission.Theself-adjustingtaperedsegmentguarantiesawearandmaintenance-freeoperation.
TorquelimiterswithdampingProperties
R+WhasdesignedandlaunchedanewoverloadprotectionwithdampingProperties.Thiscombinestheknownelastomercouplingswithatorquelimitingportion.
Betweenthesafetyelementwithclampinghubandtheothercouplinghalf,thereisanelastomerinsertmadeofthermoplasticpolyurethane(TPU)absorbingthedrivevibrations.Owingtoitselasticity,itisabletocompensateaxial,angularandlateralmisalignment,vibrations,andimpacts.Duringoperationinmachineswithfrequentimpact,changeorvibrationload,itshighdampingcapacitycanhaveapositiveeffectontheservicelifeoftheconnectedaggregates.Thishoweveronlyappliestofirst-qualitycouplingswhichconsistofindividualelementsshowingthenecessarytruthofrunningandconcentricityofthebores.
Poormanufacturedcouplingsmaycausepulsatingradialforcesontotherotationalaxleduringopera
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