Bearings yog qhov tseem ceeb hauv cov khoom siv niaj hnub tsim khoom. Yog tias lawv tsis ua haujlwm raws li qhov yuav tsum tau ua thaum sib dhos, sim, thiab siv, lub tawb nqa khoom yuav ua rau tawg, thiab thaum muaj xwm txheej hnyav, nws yuav poob tag nrho, lossis qhov ua tsis tiav loj dua. .
Tshwj xeeb tshaj yog rau cov motors high-voltage, nws kuj tseem tuaj yeem cuam tshuam qhov yaig ntawm cov ncej hluav taws xob ntawm cov kabmob, yog li yuav tsum tau them nyiaj tshwj xeeb thiab cov kev ntsuas cuam tshuam yuav tsum tau ua. Yog li dab tsi tiag tiag ua rau lub tawb nqa khoom tawg lossis txawm poob?
Cia's saib.....
Kev siv tsis raug thiab siv tsis raug yog qhov ua rau pob txha tawg
Peb feem ntau bearing tawg thiab tawg yam tseem ceeb:
yuam kev tawg
Ntsiab lus:
· Tensile zog
· Kev ntxhov siab ntau dhau
Qhov laj thawj feem ntau yog kev tuav tsis zoo (knocking) thaum lub sij hawm kev teeb tsa lossis tshem tawm. Ntaus lub nplhaib bearing nrog rauj lossis chisel ncaj qha, uas yuav ua rau tawg me me. Thaum cov kabmob tau muab tso rau hauv kev siv, qhov tawg ntawm lub nplhaib yuav tawg.
Loj spherical roller bearing nrog tawg puab nplhaib. Nres thaum lub sijhawm ua haujlwm thiab tshem tawm cov menyuam los xyuas qhov xwm txheej ntawm cov kabmob sib tw (kab qis). Ces" rauj" cov menyuam rov qab mus rau nws txoj haujlwm qub, ua rau ib feem ntawm lub nplhaib puab flange kom tawg. Qhov cuam tshuam tau kis los ntawm cov menyuam yaus hauv lwm kab, thiab ib feem ntawm cov flange sab nraud kuj tawg. Nyob rau tib lub sijhawm, lub nplhaib sealing tau tawg.
Kev cuam tshuam ntau dhau rau ntawm lub rooj zaum tapered valve lossis lub tes tsho yog lwm qhov ua rau tawg ntawm lub nplhaib puab. Tensile stress (hoop stress), vim yog kev cuam tshuam ntau dhau, yog tsim nyob rau hauv lub nplhaib puab, thiab thaum tawg, cov kabmob tau muab tso rau hauv kev ua haujlwm. (Piv nrog bainite, martensite hardened ferrules yog rhiab rau qhov no). Thaum cov kabmob yog rhuab thiab muab tso rau hauv lub ncej nrog tsis ncaj ncees lawm (ntxiv-loj) kam rau ua, qhov tshwm sim kuj tshwm sim.
Forced fracture yog ob qho piv txwv ntawm kev ntxhov siab concentration tshwm sim los ntawm lub zos overload los yog overstress uas tshaj lub tensile lub zog ntawm cov khoom.
qaug zog tawg
Ntsiab lus:
· Ntau dhau bending qaug zog
· Kev pib tawg / nthuav tawm
· Thaum kawg yuam kom so
· Lub nplhaib puab thiab tuav
Pib thaum khoov tshaj lub zog qaug zog. Cov kab nrib pleb pib thiab tom qab ntawd kis mus. Thaum kawg, tag nrho cov ferrule los yog retainer yog tawg.
Qhov no feem ntau tshwm sim thaum lub nplhaib sab nrauv tsis tau txais kev txhawb nqa hauv cov kabmob chamber, yog li lub nplhaib sab nraud muaj qee qhov kev kam rau siab, lossis lub nplhaib sab nrauv muaj cov ntsiab lus kev ntxhov siab.
Cov cua kub tawg
Ntsiab lus:
· Siab plam thiab/lossis lubrication tsis txaus
· Muaj kev sib txhuam kub
· Cov kab nrib pleb ntawm txoj cai rau txoj kev zawv zawg
Qhov zawv zawg ntawm ob qhov chaw ua rau muaj kev sib txhuam kub. Yog hais tias qhov zawv zawg ceev yog siab, thermal kev loj hlob ua rau tawg, uas feem ntau yog nyob rau ntawm txoj cai kaum rau zawv zawg kev taw qhia.
Ib qho piv txwv zoo yog lub nplhaib sab hauv uas muaj lub nplhaib xoob haum thiab cov kabmob axial loads. Vim yog creep, sab ntawm cov kabmob yuav tsim zawv zawg zog ntawm lub xub pwg abutment (los yog gasket zaum kawg) ntawm lub ncej. Kev sib txhuam generates (ntau heev) kub, uas ua rau smearing thiab nws thiaj li tawg ntawm lub ferrule.
Rolling zeb plaub-kab tapered menyuam bearings (feem ntau) yuav tsum tau clearance haum vim ceev disassembly/installation. Txhawm rau kom tsis txhob tawg, lub nplhaib puab yog" case hardened", thaum lub xub pwg nyom los yog zaum kawg gasket yog hardened.
