Muaj ntau ntau hom bearings muaj niaj hnub no, tab sis cov ntaub ntawv me me muaj nyob rau ntawm qhov sib txawv ntawm lawv. Tej zaum koj tau nug koj tus kheej "Qhov kev coj tus cwj pwm twg yog qhov zoo tshaj rau koj daim ntawv thov?" los yog "Kuv yuav xaiv cov kabmob li cas?
1. Kev faib cov kabmob
Ua ntej, koj yuav tsum paub tias feem ntau bearings nrog dov cov ntsiab lus poob rau hauv ob pawg dav:
Pob Bearings Cov Menyuam Bearings
Nyob rau hauv cov pab pawg no, muaj bearing sub-category nrog tshwj xeeb nta los yog optimized tsim los txhim kho kev ua tau zoo. Kev ua tau zoo heev, kub tsis kam, super zog, thiab lwm yam nyob rau hauv lub ntiaj teb no ntawm cov ntaub ntawv tshiab.
2. Paub meej txog plaub yam hauv daim ntawv thov thiab xaiv hom kabmob raug
1. Nrhiav bearing load thiab load peev
Bearing load feem ntau txhais tau tias yog cov tshuaj tiv thaiv quab yuam uas cov khoom siv tawm ntawm cov kabmob thaum nws siv.
Thaum xaiv txoj cai bearing rau koj daim ntawv thov, koj yuav tsum xub txiav txim siab lub peev xwm bearing. Load peev xwm yog tus nqi ntawm cov kabmob uas muaj peev xwm tuav tau thiab yog ib qho tseem ceeb tshaj plaws thaum xaiv cov kabmob.
Ua ntej, nkag siab txog hom thiab tus nqi ntawm cov kabmob load koj daim ntawv thov yuav tso rau ntawm cov kabmob. Pob bearings feem ntau yog qhov zoo tshaj plaws rau kev thauj khoom me me mus rau nruab nrab. Kev siv lub luag haujlwm hnyav feem ntau yog qhov zoo tshaj plaws rau cov menyuam bearings.
Cov kabmob loads tuaj yeem yog axial (thrust), radial lossis ua ke. Axial (los yog thrust) bearing loads yog thaum lub zog sib npaug mus rau lub axis ntawm lub ncej.
Radial bearing load yog thaum lub zog yog perpendicular mus rau lub ncej. Tom qab ntawd, cov kabmob sib xyaw ua ke yog thaum lub sijhawm sib npaug thiab qhov sib npaug ua rau lub zog angular txheeb ze rau lub ncej.
Pob bearings yog tsim los nrog cov npas kheej kheej los faib cov khoom thauj hla thaj tsam me me. Lawv zoo li tsim nyog rau me me mus rau nruab nrab loads, kis tus load los ntawm ib qho kev sib cuag.
Ntawm no yog ib qho kev siv ceev rau cov kabmob load hom thiab qhov zoo tshaj plaws pob bearing:
Radial (perpendicular rau axis) thiab lub teeb loads:
Xaiv radial pob bearings (tseem hu ua tob groove pob bearings). Radial bearings yog qee yam ntawm cov kabmob uas muaj nyob hauv khw.
Axial (thrust) (piav mus rau axis) load:
Xaiv lub Thrust Pob Bearing
Combined radial thiab axial loads:
Xaiv angular contact bearings. Cov npas hu rau raceways ntawm lub kaum sab xis uas txhawb nqa kev sib koom ua ke zoo dua.
Combined radial thiab axial loads:
Xaiv tapered roller bearings
duab
2. Paub qhov ceev ntawm koj cov cuab yeej siv
Txiav txim siab qhov kev sib hloov ceev ntawm daim ntawv thov. Kev kub ceev (RPM) feem ntau yog qhov zoo tshaj plaws nrog cov pob bearings, thaum qis qis feem ntau yog qhov zoo tshaj plaws nrog pob bearings. Kev sib hloov ceev ntawm daim ntawv thov cov cuab yeej yog qhov yuav tsum tau xav txog thaum xaiv bearings.
Pob bearings feem ntau yog thawj qhov kev xaiv yog tias koj daim ntawv thov yuav ua haujlwm ntawm kev sib hloov ceev. 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 cov dov cov ntsiab lus thiab raceways nyob rau hauv lub pob bearing yog ib qho taw tes es tsis yog ib txoj kab ntawm kev sib cuag, ib yam li cov menyuam bearing. Vim hais tias cov ntsiab lus dov nias rau hauv cov raceways raws li qhov chaw yob, qhov deformation tsawg dua tshwm sim hauv cov ntsiab lus ntawm cov pob bearings.
Lwm qhov laj thawj pob bearings zoo dua rau kev siv ceev ceev yog centrifugal quab yuam. Lub zog centrifugal txhais tau tias yog lub zog uas thawb ib qho khoom txav mus los ntawm qhov chaw sab nraud, thiab tsim los ntawm qhov inertia ntawm cov khoom. Lub zog centrifugal yog qhov tseem ceeb txwv rau kev coj tus kheej ceev vim nws hloov mus rau hauv radial thiab axial loads ntawm cov kabmob. Vim tias qhov loj ntawm cov menyuam bearing yog ntau dua li ntawm cov kabmob pob, cov kabmob cov kabmob yuav tsim kom muaj zog centrifugal ntau dua li cov kabmob ntawm tib qhov loj.
Qee lub sij hawm qhov ceev ntawm cov khoom siv yog siab tshaj qhov ntsuas ceev ntawm lub pob bearing.
Yog tias qhov no tshwm sim, ib qho kev daws teeb meem yooj yim thiab feem ntau yog hloov cov khoom siv pob bearing los ntawm cov hlau mus rau ceramic. Qhov no ua rau cov kabmob loj tib yam, tab sis nce qhov ntsuas nrawm ntawm li 25 feem pua. Vim tias cov ntaub ntawv ceramic yog sib dua li cov hlau, cov khoom siv ceramic ua kom muaj zog centrifugal tsawg dua ntawm qhov muab ceev.
Angular contact bearings yog qhov zoo tshaj plaws rau kev siv ceev ceev
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, cov khoom me me hnyav dua thiab tig nrog lub zog centrifugal tsawg. Angular contact bearings kuj muaj qhov ua ntej ua ntej ntawm cov kabmob, uas ua haujlwm nrog centrifugal quab yuam kom yob cov khoom hauv cov kabmob.
Yog tias koj tab tom tsim cov ntawv thov kev kub ceev ces koj yuav xav tau cov kabmob siab, feem ntau nyob rau hauv ABEC 7 cov chav kawm raug.
Lower precision bearings yog tsim nrog ntau qhov ntev "wiggle room" dua li qhov siab precision bearings. Yog li ntawd, thaum lub bearing yog siv nyob rau hauv ib tug high-ceev ceev, cov khoom dov ceev ceev ntawm lub bearing raceway, txo kev cia siab rau, ua rau bearing tsis ua hauj lwm. High-precision bearings yog tsim los rau cov qauv nruj thiab tsim nrog qhov sib txawv me me los ntawm kev qhia tshwj xeeb. High-precision bearings yog txhim khu kev qha rau cov ntaub ntawv khiav ceev vim tias lawv ua kom cov pob zoo thiab kev sib tw khiav.
3. Cov yam ntxwv ntawm bearing runout thiab 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 cov cuab yeej spindles, tso cai rau me me sib txawv hauv lawv cov khoom sib hloov. Yog tias koj tab tom tsim rau daim ntawv thov no, ces xaiv lub siab-precision bearing vim hais tias cov kabmob yog tsim los rau nruj heev kam rau ua thiab nws yuav ua rau tsawg dua system runout.
Bearing stiffness yog qhov tsis kam mus rau lub zog uas ua rau lub taub hau sib txawv ntawm nws cov axis thiab ua lub luag haujlwm tseem ceeb hauv kev txo qis ntawm cov ncej. Cov kabmob rigidity yog los ntawm kev sib cuam tshuam ntawm cov khoom dov nrog cov raceways. Qhov ntau qhov dov ntsiab yog nias rau hauv txoj kev sib tw, elastic deformation tshwm sim, thiab lub rigidity yog siab dua.
Bearing stiffness feem ntau yog cais raws li hauv qab no:
Axial nruj
radial nruj
Qhov siab dua cov kabmob nruj, qhov ntau dua qhov yuav tsum tau txav cov ncej hauv kev siv.
Cia peb saib yuav ua li cas nws ua haujlwm nrog precision angular contact bearings. Cov kabmob no feem ntau muaj kev tsim tawm ntawm cov nplhaib sab hauv thiab sab nraud. Thaum 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 siv dag zog sab nraud. Qhov no yog hu ua preloading, thiab cov txheej txheem nce bearing nruj txawm tias ua ntej cov kabmob muaj kev siv zog.
4. Nrhiav cov roj nplua nyeem zoo rau cov kev xav tau ntawm cov khoom siv hauv daim ntawv thov
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 thaum ntxov ntawm kev tsim cov khoom siv. Lub lubrication tsis raug yog ib qho ntawm feem ntau ua rau cov kabmob tsis ua haujlwm.
Lubrication tsim cov roj zaj duab xis ntawm cov dov cov ntsiab lus thiab cov kabmob raceways, uas pab tiv thaiv kev sib txhuam thiab overheating.
Feem ntau hom lubrication yog roj, uas muaj roj nrog lub thickener. Lub thickener khaws cov roj nyob rau hauv qhov chaw kom nws tsis tawm ntawm cov kabmob. Thaum cov npas (pob bearings) lossis cov menyuam (cov menyuam bearings) yob ntawm cov roj, cov thickener cais, tsuas yog cov roj zaj duab xis ntawm cov dov cov ntsiab lus thiab cov kabmob raceways. Tom qab cov khoom dov dhau, cov roj thiab cov thickener recombine.
Rau cov ntawv thov kev kub ceev, nws yog ib qho tseem ceeb kom paub sai npaum li cas cov roj thiab cov thickener cais thiab rov ntxiv. Qhov no yog hu ua daim ntawv thov lossis cov kabmob n*dm tus nqi. Ua ntej xaiv cov roj, koj yuav tsum nrhiav tus nqi n dm rau koj daim ntawv thov. Ua li no, muab koj daim ntawv thov RPM los ntawm txoj kab uas hla (dm) ntawm qhov nruab nrab ntawm lub pob hauv cov kabmob. Sib piv koj tus nqi n dm rau tus nqi siab tshaj plaws rau cov roj ntawm cov ntaub ntawv.
Yog tias koj tus nqi n * dm siab dua li cov roj siab tshaj plaws ntawm daim ntawv teev cov ntaub ntawv, cov roj yuav tsis muab lubrication txaus thiab ua tsis tiav ntxov yuav tshwm sim.
Lwm qhov kev xaiv lubrication rau kev siv ceev ceev yog cov roj-mist system, uas sib xyaw cov roj nrog cov cua compressed thiab txhaj rau hauv cov kabmob sib tw ntawm cov metered. Qhov kev xaiv no yog kim dua li roj lubrication vim 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 khiav ntawm qhov nrawm dua thaum tsim hluav taws xob tsawg dua li cov kabmob uas muaj roj.
Rau kev siv ceev ceev, cov roj da dej muaj 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 lubricants qhuav tuaj yeem siv los ua cov roj av hauv cov roj av, tab sis vim tias cov roj nplua nyeem cov yeeb yaj kiab tawg dhau sijhawm, cov kabmob lub neej feem ntau raug txo. Muaj ob peb lwm yam yuav tsum tau xav txog thaum xaiv lub roj nplua nyeem rau koj daim ntawv thov.
