扭矩过载保护器外文翻译文档格式.docx

扭矩过载保护器外文翻译文档格式.docx

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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