Muaj ntau ntau hom bearings muaj niaj hnub no nrog cov ntaub ntawv me me ntawm qhov sib txawv ntawm lawv.Tej zaum koj tau nug koj tus kheej "qhov twg bearing yuav zoo tshaj rau koj daim ntawv thov?"Los yog "Kuv yuav xaiv qhov bearing li cas?"Kab lus no yuav pab koj teb cov lus nug no.
Ua ntej ntawm tag nrho cov, koj yuav tsum paub hais tias feem ntau bearings nrog ib tug dov lub caij poob rau hauv ob pawg:
Pob bearings
Cov menyuam bearings
Nyob rau hauv cov pab pawg no, muaj cov pab pawg ntawm cov kabmob uas muaj cov yam ntxwv tshwj xeeb lossis kev tsim qauv zoo los txhim kho kev ua haujlwm.
Hauv tsab xov xwm no, peb yuav hais txog plaub yam uas koj yuav tsum paub txog koj daim ntawv thov txhawm rau xaiv qhov zoo ntawm cov kabmob.
Nrhiav Cov Kabmob Load & Load Capacity
Cov kabmob loads feem ntau txhais tau tias yog cov tshuaj tiv thaiv quab yuam ib qho chaw ntawm cov kabmob thaum siv.
Thaum xaiv cov kabmob zoo rau koj daim ntawv thov, ua ntej koj yuav tsum pom cov kabmob lub peev xwm thauj khoom.Lub peev xwm thauj khoom yog tus nqi thauj khoom uas tus kabmob tuaj yeem ua tau thiab yog ib qho tseem ceeb tshaj plaws thaum xaiv cov kabmob.
Cov kabmob loads tuaj yeem yog axial (thrust), radial lossis ua ke.
Lub axial (los yog thrust) bearing load yog thaum lub zog sib npaug mus rau lub axis ntawm lub ncej.
Lub radial bearing load yog thaum lub zog yog perpendicular rau lub ncej.Tom qab ntawd ib qho kev sib xyaw ua ke ntawm cov kabmob yog thaum sib npaug thiab qhov sib npaug ua rau lub zog ntawm lub kaum sab xis ntawm lub ncej.
Yuav Ua Li Cas Pob Bearings Distribute Loads
Pob bearings yog tsim los nrog cov npas kheej kheej thiab tuaj yeem faib cov khoom thauj thoob plaws thaj tsam nruab nrab.Lawv zoo li ua haujlwm zoo dua rau cov khoom me me mus rau nruab nrab, kis cov khoom thauj ntawm ib qho kev sib cuag.
Hauv qab no yog ib qho kev siv ceev ceev rau hom bearing load thiab qhov zoo tshaj plaws pob bearing rau txoj hauj lwm:
Radial (perpendicular mus rau ncej) thiab lub teeb loads: xaiv radial pob bearings (tseem hu ua sib sib zog nqus groove pob bearings).Radial bearings yog qee yam ntawm cov kabmob feem ntau ntawm kev ua lag luam.
Axial (thrust) (piav mus rau lub ncej) loads: Xaiv lub pob bearings
Ua ke, ob qho tib si radial thiab axial, loads: Xaiv ib qho kev sib cuag angular.Cov npas hu rau raceway ntawm lub kaum sab xis uas zoo dua txhawb nqa kev sib xyaw ua ke.
Cov Menyuam Bearings & Bearing Load
Cov menyuam bearings yog tsim los nrog cov cylindrical rollers uas tuaj yeem faib cov khoom thauj mus rau thaj tsam loj dua li pob bearings.Lawv nyiam ua haujlwm zoo dua rau cov ntawv thov hnyav.
Hauv qab no yog ib qho kev siv ceev ceev rau hom bearing load thiab qhov zoo tshaj plaws cov menyuam bearing rau txoj hauj lwm:
Radial (perpendicular mus rau ncej) loads: Xaiv tus qauv cylindrical roller bearings
Axial (thrust) (thaum mus rau lub ncej) loads: Xaiv cylindrical thrust bearings
Ua ke, ob qho tib si radial thiab axial, loads: Xaiv lub taper roller bearing
Kev sib hloov ceev
Kev sib hloov ceev ntawm koj daim ntawv thov yog qhov tseem ceeb tom ntej los saib thaum xaiv cov kabmob.
Yog tias koj daim ntawv thov yuav ua haujlwm ntawm kev sib hloov ceev, ces cov pob bearings feem ntau yog qhov kev xaiv.Lawv ua tau zoo dua ntawm kev nrawm dua thiab muaj kev ceev ntau dua li cov menyuam bearings.
Ib qho laj thawj yog vim li cas kev sib cuag ntawm lub dov lub caij thiab cov raceways nyob rau hauv lub pob bearing yog ib qho taw tes es tsis txhob ntawm ib txoj kab sib cuag, zoo li hauv cov menyuam bearings.Vim hais tias dov cov ntsiab lus nias rau hauv txoj kev sib tw thaum lawv dov saum npoo, muaj qhov deformation tsawg dua tshwm sim hauv cov ntsiab lus ntawm cov pob bearings.
Centrifugal Force thiab Bearings
Lwm qhov laj thawj ntawm lub pob bearing yog qhov zoo dua rau kev siv high-speed yog vim muaj zog centrifugal.Lub zog centrifugal txhais tau tias yog lub zog uas thawb tawm sab nraud ntawm lub cev txav mus los ntawm qhov chaw thiab tshwm sim los ntawm lub cev tsis muaj zog.
Lub zog centrifugal yog qhov tseem ceeb txwv rau kev coj tus kabmob nrawm vim nws hloov mus rau hauv radial thiab axial loads ntawm cov kabmob.Txij li cov menyuam bearings muaj ntau tshaj li ib lub pob bearing, cov menyuam bearing yuav tsim ib lub zog centrifugal ntau dua li ib lub pob bearing ntawm tib qhov loj.
Txo Centrifugal Force nrog Ceramic Balls Khoom
Qee lub sij hawm ib daim ntawv thov ceev yog siab tshaj lub pob bearing qhov kev ntsuas ceev.
Yog tias qhov no tshwm sim, ib qho kev daws teeb meem yooj yim thiab siv tau yog hloov cov khoom siv pob khoom los ntawm cov hlau mus rau ceramic.Qhov no ua rau cov kabmob loj tib yam tab sis muaj kwv yees li 25% kev ntsuas nrawm dua.Txij li cov khoom siv ceramic yog sib dua li cov hlau, cov khoom siv ceramic tsim tsawg zog centrifugal rau ib qho kev ceev.
High-Speed Applications Ua haujlwm zoo tshaj plaws nrog Angular Contact Bearings
Angular contact bearings yog qhov kev xaiv zoo tshaj plaws rau kev siv ceev ceev.Ib qho laj thawj yog tias cov khoom me me thiab cov khoom me me hnyav dua thiab tsim cov quab yuam centrifugal tsawg dua thaum tig.Angular hu rau bearings kuj muaj ib tug built-in preload ntawm cov bearings uas ua hauj lwm nrog centrifugal rog kom yob cov npas hauv cov kabmob.
Yog tias koj tab tom tsim daim ntawv thov kev kub ceev, ces koj yuav xav tau cov kabmob siab, feem ntau nyob rau hauv chav kawm ABEC 7 precision.
Qhov qis precision bearing muaj ntau qhov "wiggle room" thaum nws tau tsim dua li cov kabmob siab.Yog li ntawd, thaum lub bearing yog siv nyob rau hauv high speeds, lub npas sai sai dov tshaj lub bearing raceway nrog tsawg kev ntseeg siab uas yuav ua tau rau ib tug bearing tsis ua hauj lwm.
High precision bearings yog tsim nrog cov qauv nruj thiab muaj qhov sib txawv me ntsis ntawm cov specs thaum tsim.High precision bearings yog txhim khu kev qha rau daim ntaub ntawv mus ceev vim hais tias lawv xyuas kom meej zoo pob thiab raceway kev sib tshuam.
Bearing Runout & Rigidity
Bearing runout yog tus nqi uas tus ncej orbits los ntawm nws qhov chaw geometric thaum nws tig.Qee daim ntawv thov, xws li txiav cov cuab yeej spindles, tsuas yog tso cai rau qhov sib txawv me me tshwm sim ntawm nws cov khoom sib hloov.
Yog hais tias koj yog engineering ib daim ntawv thov zoo li no, ces xaiv ib tug high precision bearing vim hais tias nws yuav tsim me me system runouts vim nruj tolerances lub bearing yog tsim rau.
Bearing rigidity yog qhov tsis kam mus rau lub zog uas ua rau cov ncej sib txawv ntawm nws cov axis thiab ua lub luag haujlwm tseem ceeb hauv kev txo qis ntawm cov ncej.Bearing rigidity yog los ntawm kev sib cuam tshuam ntawm cov khoom dov nrog lub raceway.Qhov ntau dov lub caij yog nias rau hauv txoj kev sib tw, ua rau elastic deformation, qhov siab dua qhov rigidity.
Bearing rigidity feem ntau yog categorized los ntawm:
Axial rigidity
Radial rigidity
Qhov siab dua cov kabmob rigidity, ntau lub zog xav tau txav lub ncej thaum siv.
Cia peb saib yuav ua li cas qhov no ua haujlwm nrog precision angular contact bearings.Cov kabmob no feem ntau tuaj nrog kev tsim tawm ntawm qhov kev sib tw sab hauv thiab sab nrauv.Thaum lub angular contact bearings raug teeb tsa, qhov offset raug tshem tawm uas ua rau cov pob nias rau hauv txoj kev sib tw yam tsis muaj kev thov sab nraud.Qhov no yog hu ua preloading thiab cov txheej txheem nce bearing rigidity txawm ua ntej cov kabmob pom ib daim ntawv thov quab yuam.
Bearing Lubrication
Paub txog koj cov kev xav tau ntawm cov kabmob lubrication yog qhov tseem ceeb rau kev xaiv cov kabmob zoo thiab yuav tsum tau txiav txim siab ntxov hauv kev tsim daim ntawv thov.Lub lubrication tsis raug yog ib qho ntawm feem ntau ua rau cov kabmob tsis ua haujlwm.
Lubrication tsim ib zaj duab xis ntawm cov roj ntawm lub dov lub caij thiab cov kabmob raceway uas pab tiv thaiv kev sib txhuam thiab overheating.
Feem ntau hom lubrication yog roj, uas muaj cov roj nrog cov thickening tus neeg sawv cev.Tus neeg sawv cev thickening khaws cov roj rau hauv qhov chaw, yog li nws yuav tsis tawm ntawm cov kabmob.Raws li lub pob (pob bearing) lossis cov menyuam (cov menyuam kabmob) yob hla cov roj, tus neeg sawv cev thickening cais tawm tsuas yog cov yeeb yaj kiab ntawm cov roj ntawm cov khoom sib tw thiab cov kabmob sib tw.Tom qab lub dov lub caij dhau los, cov roj thiab cov thickening tus neeg sawv cev koom rov qab ua ke.
Rau cov ntawv thov kev kub ceev, kev paub txog qhov ceev ntawm cov roj thiab cov thickener tuaj yeem sib cais thiab rov ua dua yog qhov tseem ceeb.Qhov no yog hu ua daim ntawv thov lossis cov kabmob n*dm tus nqi.
Ua ntej koj xaiv cov roj, koj yuav tsum nrhiav koj daim ntawv thov ndm tus nqi.Txhawm rau ua qhov no muab koj cov ntawv thov RPMs los ntawm txoj kab uas hla ntawm qhov nruab nrab ntawm cov pob hauv cov kabmob (dm).Sib piv koj tus nqi ndm rau cov roj max ceev tus nqi, nyob rau hauv daim ntawv teev cov ntaub ntawv.
Yog tias koj tus nqi n * dm siab dua cov roj max ceev tus nqi ntawm cov ntaub ntawv, cov roj yuav tsis muaj peev xwm muab lubrication txaus thiab ua tsis tiav ntxov yuav tshwm sim.
Lwm qhov kev xaiv lubrication rau kev siv ceev ceev yog cov roj pos huab uas sib xyaw cov roj nrog cov cua compressed thiab tom qab ntawd txhaj nws mus rau hauv cov kabmob sib tw ntawm cov metered.Qhov kev xaiv no yog kim tshaj li roj lubrication vim tias nws yuav tsum muaj kev sib xyaw sab nraud thiab ntsuas qhov system thiab lim compressed cua.Txawm li cas los xij, cov roj pos huab tso cai rau cov kabmob ua haujlwm ntawm qhov nrawm dua thaum tsim kom muaj cua sov tsawg dua li cov kabmob uas muaj roj.
Rau cov ntawv thov qis dua cov roj da dej yog qhov ntau.Cov roj da dej yog thaum ib feem ntawm cov kabmob yog submerged hauv cov roj.Rau cov kabmob uas yuav ua haujlwm nyob rau hauv ib puag ncig huab cua, cov roj nplua nyeem qhuav tuaj yeem siv los hloov cov roj av los ntawm cov roj av, tab sis lub neej ntawm cov kabmob feem ntau luv luv vim yog lub luag haujlwm ntawm lubricant zaj duab xis tawg dhau sijhawm.Muaj ob peb yam tseem ceeb uas yuav tsum tau xav txog thaum xaiv lub roj nplua nyeem rau koj daim ntawv thov, saib peb cov kab lus tob "Txhua yam koj Yuav Tsum Paub Txog Bearing Lubrication.
Summary: Yuav Ua Li Cas Xaiv Cov Kabmob
Yuav ua li cas xaiv txoj cai bearing rau koj daim ntawv thov:
Nrhiav Cov Kabmob Load & Load Capacity
Ua ntej, paub hom thiab tus nqi ntawm cov kabmob uas koj daim ntawv thov yuav tso rau ntawm cov kabmob.Cov khoom me me-rau-nruab nrab-qhov loj me feem ntau ua haujlwm zoo tshaj plaws nrog pob bearings.Cov ntawv thov hnyav hnyav feem ntau ua haujlwm zoo tshaj plaws nrog cov menyuam bearings.
Paub qhov kev sib hloov ceev ntawm koj daim ntawv thov
Txiav txim siab qhov kev sib hloov ceev ntawm koj daim ntawv thov.Kev kub ceev (RPM) feem ntau ua haujlwm zoo tshaj plaws nrog cov pob bearings thiab qis qis feem ntau ua haujlwm zoo tshaj plaws nrog cov menyuam bearings.
Qhov tseem ceeb hauv Bearing Runout & Rigidity
Koj kuj xav txiav txim siab seb hom kev khiav tawm koj daim ntawv thov yuav tso cai li cas.Yog tias daim ntawv thov tso cai tsuas yog qhov sib txawv me me tshwm sim, ces lub pob bearing feem ntau yog qhov koj xaiv zoo tshaj.
Nrhiav Txoj Cai Lubrication rau Koj Cov Kev Xav Tau Bearings
Rau cov ntawv thov kev kub ceev, suav koj tus nqi n * dm, thiab yog tias nws siab dua li cov roj max ceev, cov roj yuav tsis muaj peev xwm muab lubrication txaus.Muaj lwm txoj kev xaiv xws li roj misting.Rau cov ntawv thov qis qis, cov roj da dej yog qhov kev xaiv zoo.
Cov lus nug?Peb cov kws tshaj lij hauv chaw ua haujlwm yuav nyiam geek tawm nrog koj thiab pab koj xaiv qhov zoo tshaj plaws bearing rau koj daim ntawv thov.
Post lub sij hawm: Nov-16-2022