Nov 11, 2020

Kev faib tawm ntawm cov pob zeb zeb thiab cov laj thawj cuam tshuam rau lawv lub neej kev pabcuam

Tso lus

Dov zeb kabmobhais txog kev lag luam dov, uas yog, cov hlau tsis muaj hlau, cov hlau tsis muaj hlau, thiab cov khoom lag luam uas tsis yog xim hlau calendering. Nws yog siv rau kev coj ua ntawm cov txheej txheem calendering yob thiab cov menyuam. Feem ntau, plaub-kab cylindrical roller bearings tau siv los ua lub nra hnyav radial, cov menyuam thawb lossis rub lub pob, thiab radial angular contact ball lossis radial roller bearings tau siv los ua lub nra hnyav. Tam sim no, roj-cua lubrication lossis roj mist lubrication thiab roj feem ntau yog siv rau lubrication thiab txias.

four row cylindrical roller bearings for rolling mills 1

Kev faib tawm ntawm dov zeb bearings

(1) Spherical roller bearing

Lub sijhawm ntawd, ob txheej ntawm tus kheej sib dhos rau cov menyuam tau teeb tsa ntawm tib lub caj dab yob ua ke. Kev nrawm tuaj yeem ncav cuag 600 rpm. Txawm li cas los xij, nrog kev nce nrawm, nws qhov tsis zoo dhau los ua ntau thiab ntau qhov tseem ceeb: lub neej luv luv, kev siv loj, tsis muaj qhov tseeb ntawm cov khoom tiav, hnyav hnyav ntawm lub caj dab, loj txav txav ntawm lub yob, thiab lwm yam.

(2) Plaub-kab cylindrical roller bearing+ ntsaws cov kabmob

Covcylindrical menyuam bearingmuaj qhov zoo ntawm lub peev xwm loj, qhov txwv tsis pub nrawm, qhov tseeb siab, sib cais tau thiab sib pauv tau sab hauv thiab sab nraud, ua kom yooj yim, raug nqi qis, thiab yooj yim teeb tsa thiab tshem tawm. Cov kabmob uas muaj zog nqa lub zog quab yuam, thiab cov yam ntxwv tshwj xeeb tuaj yeem raug xaiv raws li cov yam ntxwv ntawm lub zeb zeb

Nyob rau hauv qhov hnyav thiab qis qis, nws tau nruab nrog lub zog rau cov menyuam kom nqa lub zog nqa nrog kev tshem me me. Thaum lub nrawm nrawm yog siab, nrog lub ntsej muag sib sib zog nqus npas kabmob, tsis yog tsuas yog qhov txwv nrawm yog siab, tab sis kuj tseem tuaj yeem tswj tau nruj. Cov menyuam tuaj yeem tau txais phau ntawv qhia axial ze thiab tuaj yeem nqa lub dav dav dav dav. Hom kabmob no tsis tsuas yog muaj qhov zoo ntawm kev ua haujlwm ntev thiab muaj kev ntseeg siab tab sis kuj muaj qhov zoo ntawm qhov ua tau zoo thiab kev tswj tau yooj yim. Yog li ntawd, nws tau siv dav hauv cov hlau hlau zeb, phaj zeb, ntawv ci zeb, ob npaug thawb zeb zeb, txias zeb zeb, thiab kub dov zeb.

Backup roll bearings for rolling mills 2

(3) Plaub kab tapered menyuam cov kabmob

Cov menyuam uas muaj kab xev tuaj yeem dais ob lub zog radial thiab lub zog quab yuam yam tsis muaj kev cuam tshuam, yog li lub cav tseem ceeb dua. Sab hauv txoj kab uas hla ntawm cov menyuam kab sib dhos yog xoob haum nrog cov menyuam caj dab, uas yooj yim heev rau kev teeb tsa thiab tshem tawm. Txawm li cas los xij, qee zaum kev zawv zawg nkag tuaj yeem tshwm sim los ntawm qhov xoob haum. Yog li ntawd, txoj kab uas hla sab hauv feem ntau yog ua haujlwm nrog cov kauv roj zawj. Qhov kev teeb tsa no tseem siv dav, xws li ua haujlwm yob ntawm plaub qhov kub kub dov zeb thiab txias zeb zeb, tshuab paj ntoo, thiab hlau nqaj dov zeb.

Plaub-kab cylindrical roller bearing thiab plaub-kab tapered cov menyuam tau yuav luag txhua qhov siv hauv lub caj dab, cov menyuam, thiab cov xov xov ntawm lub zeb zeb. Piv nrog rau lwm cov menyuam cov kabmob, cov kabmob no muaj kev sib txhuam qis. Raws li cov kabmob no feem ntau tau teeb tsa rau ntawm lub caj dab yob nrog kev cuam tshuam haum, lawv tshwj xeeb tshaj yog haum rau kev siv lub tshuab ua kom nrawm nrawm. Qhov ntu ntu qis ntawm cov kabmob no tso cai rau siv cov ntawv xov xwm loj sib piv nrog rau txoj kab uas hla. Vim tias nws tuaj yeem thauj khoom nrog ntau lub chais, nws lub peev xwm thauj khoom radial siab heev.

double row tapered roller bearing for rolling mills 1

Cov teeb meem cuam tshuam rau kev pab cuam lub neej ntawm dov zeb bearings

Rolling mill bearing yog ib feem tseem ceeb ntawm cov milling. Hauv cov txheej txheem ntawm kev ua haujlwm zeb zeb, cov kabmob txhawb nqa cov yob, ua rau lub zog quab yuam, thiab ua kom txoj haujlwm raug ntawm yob. Txawm hais tias qhov ua tau zoo ntawm kev sib tsoo zeb yog kev ntseeg tau lossis tsis thiab qhov ntev ntawm kev pabcuam lub neej cuam tshuam ncaj qha rau kev ntseeg tau ntawm kev ua haujlwm zeb zeb Muaj ntau yam xwm txheej uas cuam tshuam rau kev pabcuam lub neej ntawm kev sib tsoo zeb bearings. Cov txheej txheem sab hauv thiab sab nraud, xws li cov khoom siv coj los ua, tsim qauv tsim, tsim khoom raug, teeb tsa thiab ntim khoom, lubrication, thiab txias, yuav cuam tshuam rau kev pab cuam lub neej ntawm kev siv zeb zeb

Qhov ua haujlwm tsis zoo yog qhov laj thawj tseem ceeb rau kev ua tsis tiav ntxov ntawm kev sib tsoo zeb bearings. Feem ntau hais lus, kev pabcuam cov kabmob ntawm cov kabmob feem ntau suav nrog lub nra thiab nws kev faib khoom, lubrication, sealing, kis tau tus mob, ua haujlwm kub, ua kom lub cev kub, thiab lwm yam. yog tias kev ua haujlwm sib txawv.

1. Cov nyhuv ntawm carbide ntawm kev coj' kev pab lub neej

Lub microstructure ntawm cov pa roj carbon siab hlau yuav hloov mus rau hauv cov khoom uas tsis tau muab pov tseg, cov khoom siv martensite, thiab khaws cia austenite tom qab ua kom sov thiab kub kho kom sov. Cov ntsiab lus thiab kev faib tawm ntawm cov carbide uas tsis tau daws, qhov loj ntawm acicular martensite, thiab khaws cia austenite cuam tshuam rau qhov pom tseeb ntawm cov kabmob. Qhov qis dua cov ntsiab lus ntawm cov carbide uas tsis tau daws hauv cov hlau yog, qhov siab dua ntawm qhov hnyav ntawm cov hlau yog qhov tsawg dua cov ntsiab lus, ntau dua cov pa roj carbon ntau dua thiab tawv ntawm martensite matrix.

Ib qho me me ntawm cov carbide uas tsis tau daws hauv cov quenched bearing steel yog qhov muaj txiaj ntsig zoo los txhim kho qhov hnav tsis kam ntawm cov kabmob thiab tau txais txiaj ntsig zoo cryptocrystalline martensite, yog li txhawm rau txhim kho qhov nruj thiab qaug zog ntawm kev coj tus kheej; qhov me me ntawm carbide muaj qhov cuam tshuam loj rau kev ua haujlwm lub neej, thiab kev pabcuam lub neej ntawm kev coj cov hlau nrog carbide particle tsawg dua 0.6um yuav raug txhim kho kom zoo Qhov loj ntawm cov carbide hais tau qis dua li ntawm cov kabmob hlau loj, thiab kev faib tawm ntawm cov carbide hais tau zoo dua qub, thiab nws yuav tsis tshwm raws li cov khoom faib tawm; lub network carbide faib yuav cuam tshuam rau kev sib raug zoo ntawm cov matrix nplej, uas yuav txo qis kev tiv thaiv kev qaug zog ntawm cov kabmob. Thaum qhov kev nyuab siab ntawm lub cev ntxeev thiab txoj kev sib tw hla dhau qhov txwv kev qaug zog, cov kab nrib pleb yuav maj mam tshwm sim, yog li ua kom luv tus ncej Bearing lub neej.

2. Cov nyhuv ntawm bainite ntawm kev coj' lub neej

Cov yam ntxwv ntawm bainite tus qauv tuaj yeem txhim kho qhov txwv txwv, khoov lub zog, tawm dag zog lub zog, thiab txo thaj tsam ntawm cov pa roj carbon chromium bearing steel, txhim kho qhov tawv ntawm cov kabmob steel, txhim kho kev muaj peev xwm ntawm kev cuam tshuam kev quab yuam, kev tawg, thiab kev sib txhuam, thiab pab txhawb kev saib xyuas zoo ntawm cov kabmob loj.

3. Cuam tshuam ntawm cov xwm txheej hnyav ntawm kev coj' lub neej

Cov kabmob uas siv hauv cov tshuab milling feem ntau suav nrog cov hauv qab no: ntau lub tog raj kheej rau cov menyuam, plaub kab kab sib dhos, thiab ob kab ib kab kheej kheej rau cov menyuam. Tsis xav txog qhov zoo ntawm cov kabmob nws tus kheej, kev pabcuam lub neej ntawm cov kabmob hauv kev ua haujlwm yog qhov txiav txim siab los ntawm kev thauj khoom ntawm cov kabmob.

Vim tias muaj zog ntxiv dag zog ntawm lub zeb zeb, tsuas yog cov kab ntau kab tuaj yeem siv rau hauv lub caj dab. Lub tswv yim tsim ntawm ntau kab ua kab yog tso siab rau ntau kab ua ntu cov khoom kom ua haujlwm zoo ib yam, thiab tom qab ntawd txhim kho cov peev txheej. Txawm li cas los xij, hauv qhov txheej txheem tiag tiag ntawm lub zeb zeb, kev muaj peev xwm ntawm cov kab sib dhos ua ke tsis tuaj yeem ua kom zoo ib yam, thiab txawm tias qhov sib txawv loj yuav tshwm sim. Lub hauv paus tseem ceeb ua rau muaj qhov sib txawv suav nrog Nyob rau tib lub sijhawm, kev faib khoom ntawm cov kabmob kuj tseem cuam tshuam los ntawm kev quab yuam, quab yuam quab yuam, thiab khoov quab yuam.

Qhov no yuav dhau mus ua qhov kev hloov pauv ntawm lub nra ntawm txhua lub caij sib dhos nyob rau hauv qhov xwm txheej uas qhov sib npaug ntawm cov kabmob uas tag nrho tsis hloov pauv, thiab thaum kawg ua rau ib nrab load. Thaum qhov kev ua haujlwm tsis txaus ntseeg tau tsim, nws yuav txuas ntxiv mus ntxiv nrog kev siv tas mus li, kom txog rau thaum cov khoom thauj los ntawm cov khoom siv tshwj xeeb tshaj li qhov muaj peev xwm kawg ntawm cov txheej txheem dov, uas ua rau muaj kev tawg hauv zos.

Lub nraub qaum yog qhov cuam tshuam loj rau kev ua neej. Ntxiv nrog rau qhov kev tshuaj xyuas saum toj no yuav ua rau kev thauj khoom tsis sib luag ntawm txhua kab ntawm cov menyuam, nws tseem yuav ua rau ib leeg kab rau cov menyuam qaij, ua rau muaj kev ntxhov siab rau hauv zos kev mloog lus, ua rau muaj cov txheej txheem zawv zawg. Thaum cov kev hloov pauv tau hloov pauv, kev sib tiv tauj ntawm cov menyuam cov kabmob thiab sab hauv thiab sab nrauv yuav tshwm sim, ua rau muaj cua sov thiab ua rau puas tsuaj.

four row cylindrical roller bearings for rolling mills 2

4. Cuam tshuam ntawm cov roj nplua nyeem zoo ntawm kev coj' lub neej

Cov kabmob tsis tuaj yeem siv tau ntseeg tau rau lub sijhawm ntev yam tsis muaj kev lees paub ntawm kev ua kom zoo. Thaum lub sijhawm ua haujlwm ib txwm muaj, lub ntsej muag cov kabmob yuav raug kev txom nyem los ntawm ntau yam kev sib txhuam. Thaj chaw thauj khoom ntawm txoj kev sib tw ntiv nplhaib sab nraud yog qhov loj tshaj uas ua rau muaj kev sib txhuam sab hauv. Yuav tsum muaj qhov sib txawv ntawm cov roj hauv cov txheej txheem kev ua haujlwm, thiab cov menyuam dov yuav tsuas yog nyob hauv thaj chaw thauj khoom, yog li thaj chaw tsis thauj khoom yuav nyob hauv ib nrab thiab ib nrab zawv zawg lub xeev, Thaum cov menyuam nkag mus rau thaj chaw thauj khoom los ntawm thaj tsam tsis thauj khoom, qhov nrawm ntawm cov menyuam yuav nce sai. Hauv cov txheej txheem ntawm kev nrawm nrawm, cov menyuam thiab txoj kev sib tw yuav rub nrawm, thiab tib lub sijhawm, lawv yuav dais thiab tuaj ntawm qhov cuam tshuam rau hauv cov txheej txheem dov.

Hauv qhov no, yog tias lub lubrication ntawm cov kabmob tsis zoo, qhov ntxhib ntawm ib feem nto yuav txuas ntxiv mus, uas yuav ua rau maj mam nce ntawm hnav thiab siab ntawm cov menyuam chav tsev nto. Nyob rau tib lub sijhawm, kev sib txhuam zawv zawg tshwm sim nruab nrab ntawm txoj kab sib dhos thiab txoj kev sib tw, nruab nrab ntawm txoj kab sib dhos thiab lub tawb, nruab nrab ntawm lub tawb thiab sab hauv thiab sab nrauv thaum lub sijhawm ua haujlwm ntawm cov kabmob Nws yuav nce nrog qhov nce ntawm kev thauj khoom. Lub hav zoov ntawm kev sib txhuam zawv zawg yuav ua rau cov txheeb ze nkag ntawm cov kabmob sib xyaw. Txhawm rau txo qhov hnav los ntawm tus txheeb ze cuam tshuam ntawm cov khoom sib dhos, nws yog qhov tsim nyog los tswj kom muaj cov roj nplua nyeem zoo ntawm cov kabmob. Cov roj nplua nyeem zaj duab xis tuaj yeem cais qhov sib tiv tauj ntawm ntau qhov chaw thiab zam kev sib txhuam ncaj qha ntawm cov hlau. Nyob rau tib lub sijhawm, cov roj nplua nyeem zoo kuj tseem tuaj yeem ua lub luag haujlwm zoo hauv kev tso cua sov, uas tuaj yeem txo qis kev sib txhuam cua sov thaum ua haujlwm.

5. Cuam tshuam ntawm kev sib khi zoo ntawm kev coj' lub neej

Vim tias qhov tsis zoo ib puag ncig ntawm kev ua haujlwm ntawm cov menyuam kabmob, qhov tshwm sim ntawm kev kis kab mob sib kis yuav nce ntxiv. Yog li, nws yog qhov yuav tsum tau khaws cov kabmob foob kom zoo kom tsis txhob kis kab mob. Feem ntau, cov kabmob uas siv hauv cov khoom siv dov yog feem ntau ua paug los ntawm dej txias thiab ntsuas.

Tom qab cov roj tau ua paug los ntawm dej, qhov kev tiv thaiv kev qaug zog ntawm cov khoom siv yuav raug txo qis, yog li ua rau tawg. Yog tias cov roj tau ua paug los ntawm cov hlau oxide scale, qhov xwm txheej yuav phem dua. Cov hlau oxide nplai yuav ua rau puas sab hauv lub cev ntawm cov kabmob, thiab cov kabmob saum npoo yuav muaj kev sib txhuam.

Tom qab cov kabmob tau ua paug los ntawm cov dej txias thiab cov hlau oxide nplai, lub nplhaib yuav tsis zoo nyob hauv tus txheej txheem siv. Nrog kev nce ntawm cov pa phem, lub nplhaib yuav tawg thiab cov kabmob yuav raug puas tsuaj. Yog li ntawd, lub foob zoo tagnrho tuaj yeem txhim kho kev pabcuam lub neej ntawm cov kabmob thiab txo qhov tshwm sim ntawm kev ua kom cov kabmob puas ntsoog cuam tshuam rau kev tsim khoom.


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