Txog thaum tag nrho cov motors tau tsim los nrog kev tiv thaiv kev tiv thaiv, cov neeg ua haujlwm tu cov nroj tsuag thiab cov khw kho lub cev yuav txuas ntxiv hloov cov kabmob puas. Tab sis yog tias lub cev muaj zog' qhov teeb meem kev coj tus kheej raug kho kom raug thiab txhim kho kom zoo, nws tsuas yog yuav tsum tau ua ib zaug xwb.
Qhov zoo dua, cov kws tshaj lij tuaj yeem siv cov txheej txheem kuaj mob tshiab (kev tshuaj xyuas kev vibration, thermography, ntsuas qhov ntsuas hluav taws xob, thiab lwm yam) txhawm rau tiv thaiv hluav taws xob kev puas tsuaj txij thaum pib. Rau lub cev muaj zog tshiab lossis ib qho uas twb tau ua haujlwm lawm, qhov no yog qhov txhais tau los ntawm" kev coj ua zoo tshaj."
Qhov Ua rau
Cov kabmob tsis ua haujlwmCov nqi sib txawv, tab sis cov pov thawj qhia tias ib feem tseem ceeb ntawm cov kev ua tsis tiav no tsuas yog tshwm sim peb mus rau 12 lub hlis tom qab lub kaw lus pib. Vim tias niaj hnub no ntau' cov motors tau kaw cov kabmob kom tsis txhob muaj av thiab lwm yam khoom paug, hluav taws xob puas tsuaj tau dhau los ua qhov feem ntau ua rau cov kabmob tsis ua haujlwm hauv AC motors nrog VFDs.
Lub siab hloov zaus ntawm hnub no' s VFDs tsim cov kab mob parasitic capacitance ntawm lub cev muaj zog' s stator thiab rotor. Los ntawm tam sim no nws yog dav to taub hais tias ib zaug lub resulting ncej voltages overcome lub dielectric zog ntawm bearing roj, lawv tawm raws txoj kev ntawm tsawg kawg nkaus kuj - feem ntau los ntawm cov bearings (Daim duab 1).
Daim duab 1.Voltages arcing los ntawm cov bearings ntawm VFD-tsav motors tsim ntau txhiab pits, uas ua rau muaj kev sib txhuam thiab suab nrov thiab lub peev xwm rau cov nqi uas tsis tau npaj tseg downtime li bearing roj deteriorates.
Cov kev tso tawm no nquag heev uas lawv tsim ntau lab tus me me fusion craters. Ua ntej ntev, tag nrho cov kabmob sib tw phab ntsa tuaj yeem ua cim nrog suav tsis txheeb pits hu ua frosting. Ib qho tshwm sim hu ua fluting kuj yuav tshwm sim zoo li, shaping lub frosting rau hauv washboard-zoo li ridges thoob plaws bearing haiv neeg (Daim duab 2). Qhov no ua rau lub suab nrov, kev vibration, nce kev sib txhuam thiab kev puas tsuaj rau cov kabmob tsis ua haujlwm.
Hloov pauv
Rau ib puag ncig uas lub cev muaj zog yuav raug ntau dhau ntawm cov av, plua plav lossis lwm cov khib nyiab, nws yuav tsim nyog los tiv thaiv lub nplhaib' s fibers nrog O-ring lossis V-slinger. Bearing isolators nrog built-in circumferential grounding rings kuj muaj. Rau qhov chaw ua haujlwm hnyav xws li ntau daim ntawv thov mining, txawm li cas los xij, mounting lub nplhaib hauv av hauv lub cev muaj kev tiv thaiv zoo tshaj plaws los ntawm kev sib kis (Daim duab 5).
Daim duab 5.Internal installation ntawm lub nplhaib grounding muab
ntxiv kev tiv thaiv los ntawm hmoov av, avthiab lwm yam kab mob hauv lub luag haujlwm hnyav
daim ntawv thov.
Siv cov khoom siv hluav taws xob epoxy lossis cov ntsia hlau, lub nplhaib tuaj yeem txuas ncaj qha mus rau cov kabmob tuav. Ib qho ntxiv machined spacer yuav khaws lub nplhaib kom deb ntawm cov kabmob roj kab noj. Kev sib cuag hlau-rau-hlau tseem yog qhov tseem ceeb, yog li tus tuav cov kabmob yuav tsum tsis pub muaj cov txheej txheem lossis lwm yam khoom siv tsis zoo uas nws yuav kov lub nplhaib.
Rau kab rov tav los yog ntsug mounted motors nrog horsepower ntawm 100 los yog tsawg dua thiab ib-kab radial pob bearings ntawm ob hnub, ib tug ncej grounding nplhaib tuaj yeem ntsia tau rau ntawm qhov kawg. Rau kab rov tav mounted motors nrog horsepower ntau dua 100 thiab ib-kab radial pob bearings ntawm ob qho kawg, cov kabmob vaj tsev nyob ntawm qhov kawg tsis muaj zog yuav tsum tau muab hluav taws xob cais tawm kom cuam tshuam cov dej ntws. Cov kev xaiv kom ua tiav qhov kev sib cais muaj xws li lub tes tsho insulated, nonconductive coatings, ceramic bearings lossis hybrid bearings. Lub nplhaib grounding yuav tsum tau nruab rau ntawm qhov kawg tsav.
Rau txhua lub cev muaj zog uas cov bearings ntawm ob qho kawg tau raug rwb thaiv tsev, qhov kawg tsav yog qhov zoo dua rau kev teeb tsa lub nplhaib hauv av los tiv thaiv cov kabmob hauv cov cuab yeej txuas xws li lub gearbox, twj tso kua mis, kiv cua lossis encoder.
Rau txhua lub cev muaj zog nrog cov menyuam cylindrical, Babbitt lossis lub tes tsho bearings, qhov kawg nrog cov kabmob no yuav tsum raug cais tawm, thiab lub nplhaib hauv av yuav tsum tau nruab rau ntawm qhov kawg.