Kev tu lub cav yog qhov tseem ceeb rau kev ncua lub neej ntawm koj lub conveyor.Qhov tseeb, kev xaiv thawj zaug ntawm lub cav zoo tuaj yeem ua qhov sib txawv loj hauv kev saib xyuas.
Los ntawm kev nkag siab txog qhov yuav tsum tau muaj lub zog ntawm lub cev muaj zog thiab xaiv cov yam ntxwv kho kom raug, ib tus tuaj yeem xaiv lub cev muaj zog uas yuav kav ntau xyoo dhau qhov lav nrog kev saib xyuas tsawg.
Lub luag haujlwm tseem ceeb ntawm lub tshuab hluav taws xob yog tsim kom muaj lub zog torque, nyob ntawm lub zog thiab ceev.Lub koom haum National Electrical Manufacturers (NEMA) tau tsim cov qauv kev faib tawm uas txhais tau ntau lub peev xwm ntawm lub cev muaj zog.Cov kev faib tawm no yog hu ua NEMA tsim nkhaus thiab feem ntau yog plaub hom: A, B, C, thiab D.
Txhua qhov nkhaus txhais cov qauv torque xav tau rau kev pib, nrawm thiab ua haujlwm nrog cov khoom sib txawv.NEMA Design B motors yog suav tias yog cov qauv motors.Lawv yog siv nyob rau hauv ntau yam kev siv uas qhov pib tam sim no qis dua me ntsis, qhov twg siab pib torque tsis tas yuav tsum tau, thiab qhov twg lub cev muaj zog tsis tas yuav txhawb nqa hnyav.
Txawm hais tias NEMA Design B npog kwv yees li 70% ntawm tag nrho cov motors, lwm qhov kev tsim torque yog qee zaum xav tau.
NEMA A tsim zoo ib yam li tsim B tab sis muaj siab dua pib tam sim no thiab torque.Tsim Ib lub cev muaj zog yog tsim nyog rau kev siv nrog Variable Frequency Drives (VFDs) vim yog lub siab pib lub zog uas tshwm sim thaum lub cev muaj zog ua haujlwm ze rau tag nrho cov load, thiab qhov siab dua qhov pib tam sim no tsis cuam tshuam rau kev ua haujlwm.
NEMA Design C thiab D motors yog suav tias yog siab pib torque motors.Lawv siv thaum xav tau ntau lub zog thaum ntxov hauv cov txheej txheem kom pib hnyav hnyav.
Qhov sib txawv loj tshaj plaws ntawm NEMA C thiab D tsim yog tus nqi ntawm lub cev muaj zog kawg nrawm nrawm.Kev nrawm nrawm ntawm lub cev muaj zog ncaj qha cuam tshuam rau kev ceev ntawm lub cev muaj zog ntawm tag nrho cov load.Plaub-ncej, tsis muaj lub cev muaj zog yuav khiav ntawm 1800 rpm.Tib lub cev muaj zog nrog ntau plam yuav khiav ntawm 1725 rpm, thaum lub cev muaj zog nrog qis dua yuav khiav ntawm 1780 rpm.
Feem ntau cov chaw tsim khoom muaj ntau yam qauv qauv tsim rau ntau yam NEMA tsim nkhaus.
Tus nqi ntawm torque muaj nyob rau ntawm qhov sib txawv ceev thaum pib yog qhov tseem ceeb vim qhov xav tau ntawm daim ntawv thov.
Conveyors yog daim ntawv thov torque tas li, uas txhais tau hais tias lawv qhov xav tau torque tseem nyob tas li thaum pib.Txawm li cas los xij, conveyors yuav tsum tau pib torque ntxiv kom ntseeg tau tias kev ua haujlwm torque tas li.Lwm yam khoom siv, xws li kev hloov pauv zaus thiab hydraulic clutches, tuaj yeem siv tawg torque yog tias txoj siv conveyor xav tau lub zog ntau dua li lub cav tuaj yeem muab ua ntej pib.
Ib qho tshwm sim uas tuaj yeem cuam tshuam tsis zoo rau qhov pib ntawm lub load yog qhov tsis tshua muaj hluav taws xob.Yog hais tias lub input mov voltage poob, lub generated torque poob ho.
Thaum txiav txim siab seb lub cev muaj zog torque puas txaus los pib lub nra, qhov pib voltage yuav tsum tau txiav txim siab.Kev sib raug zoo ntawm voltage thiab torque yog ib qho kev ua haujlwm quadratic.Piv txwv li, yog tias qhov hluav taws xob poob mus rau 85% thaum pib, lub cev muaj zog yuav tsim tau kwv yees li 72% ntawm lub zog tag nrho.Nws yog ib qho tseem ceeb los ntsuas qhov pib torque ntawm lub cev muaj zog nyob rau hauv kev sib raug zoo nrog lub load nyob rau hauv cov xwm txheej phem tshaj.
Lub caij no, qhov kev khiav hauj lwm qhov tseem ceeb yog tus nqi ntawm overload uas lub cav muaj peev xwm tiv taus nyob rau hauv qhov kub thiab txias yam tsis muaj overheating.Tej zaum nws yuav zoo li tias qhov kev pabcuam siab dua, qhov zoo dua, tab sis qhov no tsis yog ib txwm muaj.
Kev yuav lub cav loj loj thaum nws tsis tuaj yeem ua haujlwm ntawm lub zog siab tshaj plaws tuaj yeem ua rau cov nyiaj pov tseg thiab qhov chaw.Qhov zoo tshaj plaws, lub cav yuav tsum khiav tsis tu ncua ntawm 80% thiab 85% ntawm lub zog ntsuas kom ua tau zoo tshaj plaws.
Piv txwv li, lub cev muaj zog feem ntau ua tiav kev ua haujlwm siab tshaj plaws ntawm kev thauj khoom ntawm 75% thiab 100%.Txhawm rau kom ua tau zoo tshaj plaws, daim ntawv thov yuav tsum siv li ntawm 80% thiab 85% ntawm lub cav fais fab uas teev rau ntawm daim ntawv teev npe.