Kev thov nce ntxiv los txhim kho kev ntseeg tau thoob plaws kev lag luam txhais tau tias engineers yuav tsum xav txog txhua yam ntawm lawv cov khoom siv.Cov kabmob kabmob yog qhov tseem ceeb hauv lub tshuab thiab lawv qhov tsis ua haujlwm tuaj yeem ua rau muaj kev puas tsuaj loj thiab raug nqi kim.Cov kabmob tsim muaj qhov cuam tshuam loj rau kev ntseeg tau, tshwj xeeb tshaj yog nyob rau hauv huab cua kev ua haujlwm nrog rau qhov kub siab lossis qis qis, lub tshuab nqus tsev thiab cov cua corrosive.Tsab ntawv xov xwm no qhia txog kev txiav txim siab los coj thaum qhia txog cov kabmob rau qhov nyuaj ib puag ncig, yog li engineers tuaj yeem ua kom muaj kev ntseeg siab thiab ua haujlwm zoo ntawm lawv cov khoom siv mus ntev.

Ib qho kev coj tus kheej muaj ntau yam xws li cov pob, nplhaib, tawb thiab lubrication piv txwv.Tus qauv bearings tsis feem ntau sawv ntsug ntawm qhov hnyav ntawm ib puag ncig hnyav thiab yog li kev txiav txim siab tshwj xeeb rau tus kheej yuav tsum tau ua.Cov ntsiab lus tseem ceeb tshaj plaws yog lubrication, cov khoom siv, thiab kev kho cua sov tshwj xeeb lossis cov txheej txheem thiab los ntawm kev saib txhua yam txhais tau tias cov bearings tuaj yeem tsim tau zoo tshaj plaws rau daim ntawv thov.

Ua haujlwm ntawm qhov kub thiab txias

Cov ntawv thov kub siab, xws li cov siv hauv kev ua haujlwm hauv kev lag luam aerospace tuaj yeem nthuav tawm cov teeb meem rau cov qauv bearings.Tsis tas li ntawd, qhov kub thiab txias tau nce siab hauv cov cuab yeej siv raws li cov cuab yeej ua kom me dua thiab muaj zog ntau zog, thiab qhov no ua rau muaj teeb meem rau qhov nruab nrab bearing.

Lubrication

Lubrication yog qhov tseem ceeb ntawm no.Cov roj thiab roj muaj qhov kub siab tshaj plaws ua haujlwm thaum lub sijhawm lawv yuav pib degrade thiab evaporate sai sai ua rau cov kabmob tsis ua haujlwm.Cov roj txheej txheem feem ntau txwv rau qhov kub siab tshaj plaws ntawm ib puag ncig 120 ° C thiab qee cov pa roj kub kub muaj peev xwm tiv taus qhov kub txog li 180 ° C.

Txawm li cas los xij, rau cov ntawv thov uas yuav tsum tau muaj qhov kub thiab txias tshwj xeeb fluorinated lubricating greases muaj thiab qhov kub thiab txias tshaj 250 ° C tuaj yeem ncav cuag.Qhov twg cov kua roj lubrication tsis tuaj yeem ua tau, cov khoom siv lubrication yog ib qho kev xaiv uas tso cai rau kev ua haujlwm tsis tshua muaj kev ntseeg siab ntawm qhov kub siab dua.Hauv qhov no, molybdenum disulphide (MOS2), tungsten disulphide (WS2), graphite lossis Polytetrafluoroethylene (PTFE) raug pom zoo ua cov roj nplua nyeem vim lawv tuaj yeem tiv taus qhov kub thiab txias rau lub sijhawm ntev.

Khoom siv

Thaum nws los txog rau qhov kub thiab txias tshaj 300 ° C lub nplhaib tshwj xeeb thiab cov khoom siv pob yog tsim nyog.AISI M50 yog cov hlau kub kub uas feem ntau pom zoo raws li nws nthuav tawm kev hnav thiab qaug zog ntawm qhov kub siab.BG42 yog lwm cov hlau kub kub uas muaj qhov kub zoo ntawm 300 ° C thiab feem ntau tau teev tseg vim tias nws muaj kev tiv thaiv corrosion siab thiab tseem tsis tshua muaj kev qaug zog thiab hnav thaum kub heev.

Cov tawb kub kub kuj tseem yuav tsum tau thiab lawv tuaj yeem muab cov khoom siv tshwj xeeb polymer xws li PTFE, Polyimide, Polyamide-imide (PAI) thiab Polyether-ether-ketone (PEEK).Rau cov roj kub kub lubricated tshuab bearing tawb kuj tuaj yeem tsim los ntawm tooj liab, tooj dag lossis nyiaj-plated steel.

Txheej thiab kev kho cua sov

Cov txheej txheem siab heev thiab kev kho saum npoo tuaj yeem siv rau cov kabmob los tiv thaiv kev sib txhuam, tiv thaiv corrosion thiab txo qis hnav, yog li txhim kho cov kabmob kev ua haujlwm ntawm qhov kub thiab txias.Piv txwv li, steel tawb yuav coated nrog nyiaj los txhim kho kev ua tau zoo thiab kev ntseeg tau.Nyob rau hauv cov ntaub ntawv ntawm lubricant tsis ua hauj lwm / kev tshaib kev nqhis, cov nyiaj-plating ua zoo li cov khoom siv roj nplua nyeem, cia cov kabmob txuas ntxiv mus rau lub sijhawm luv luv lossis thaum muaj xwm txheej ceev.

Kev ntseeg tau ntawm qhov kub thiab txias

Ntawm qhov kawg ntawm qhov ntsuas, qhov ntsuas kub qis tuaj yeem ua teeb meem rau cov qauv bearings.

Lubrication

Hauv cov ntawv thov kub tsis tshua muaj, piv txwv li cov ntawv thov cryogenic siv nrog qhov kub thiab txias hauv thaj tsam ntawm -190 ° C, cov roj lubrication ua waxy ua rau cov kabmob tsis ua haujlwm.Khoom lubrication xws li MOS2 lossis WS2 yog qhov zoo tagnrho rau kev txhim kho kev ntseeg tau.Tsis tas li ntawd, nyob rau hauv cov ntawv thov no, cov xov xwm raug tso tawm tuaj yeem ua cov roj nplua nyeem, yog li cov bearings yuav tsum tau tsim tshwj xeeb rau kev khiav lag luam ntawm qhov kub qis no siv cov ntaub ntawv uas ua haujlwm zoo nrog kev tshaj tawm.

Khoom siv

Ib qho khoom siv uas tuaj yeem siv los txhim kho tus kabmob lub neej qaug zog thiab hnav tsis kam yog SV30® - martensitic los ntawm-hardened, siab nitrogen, corrosion-resistant steel.Ceramic npas kuj raug pom zoo raws li lawv xa cov kev ua tau zoo dua.Lub hauv paus ntawm txhua yam khoom ntawm cov khoom txhais tau hais tias lawv muab kev ua haujlwm zoo hauv cov txheej txheem lubrication tsis zoo, thiab nws yog qhov zoo dua rau kev khiav lag luam kev ntseeg siab ntawm qhov kub thiab txias.

Cov khoom siv tawb yuav tsum raug xaiv kom hnav tsis taus raws li qhov ua tau thiab cov kev xaiv zoo ntawm no suav nrog PEEK, Polychlorotrifluoroethylene (PCTFE) thiab PAI plastics.

Kev kho cua sov

Rings yuav tsum tau tshwj xeeb cua sov kho los txhim kho qhov seem stability ntawm tsawg kub.

Sab hauv tsim

Ib qho kev txiav txim siab ntxiv rau kev ua haujlwm hauv qhov kub thiab txias yog qhov kev coj tus kheej tsim sab hauv.Bearings yog tsim los nrog ib theem ntawm kev ua si radial, tab sis raws li qhov kub thiab txias, cov khoom bearings undergo thermal contraction thiab tus nqi ntawm radial plays yog li ntawd txo.Yog tias qib ntawm radial ua si txo mus rau xoom thaum lub sijhawm ua haujlwm, qhov no yuav ua rau cov kabmob tsis ua haujlwm.Cov kabmob uas tau npaj rau kev siv qhov kub thiab txias yuav tsum tau tsim nrog kev ua si radial ntau dua ntawm chav tsev kub kom tso cai rau qib kev ua haujlwm radial ua si ntawm qhov kub qis.

Tuav lub siab ntawm lub tshuab nqus tsev

Nyob rau hauv ultra-high lub tshuab nqus tsev ib puag ncig xws li cov uas tam sim no nyob rau hauv manufacturing electronics, semiconductors thiab LCDs, lub siab yuav qis dua 10-7mbar.Ultra-high lub tshuab nqus tsev bearings feem ntau yog siv rau hauv cov khoom siv actuation nyob rau hauv qhov chaw tsim khoom.Lwm daim ntawv thov lub tshuab nqus tsev yog cov twj turbomolecular (TMP) uas tsim lub tshuab nqus tsev rau qhov chaw tsim khoom.Hauv daim ntawv thov tom kawg no cov bearings feem ntau yuav tsum tau ua haujlwm ntawm kev kub ceev.

Lubrication

Lubrication nyob rau hauv cov xwm txheej no yog qhov tseem ceeb.Ntawm lub tshuab nqus tsev siab, cov qauv lubrication roj evaporate thiab outgass, thiab tsis muaj lubrication zoo tuaj yeem ua rau cov kabmob tsis ua haujlwm.Tshwj xeeb lubrication yog li yuav tsum tau siv.Rau qhov chaw nqus tsev siab (txog li 10-7 mbar) PFPE roj tuaj yeem siv tau vim lawv muaj kev tiv thaiv ntau dua rau evaporation.Rau qhov chaw nqus tsev vacuum ultra-siab (10-9mbar thiab hauv qab) cov khoom siv lubricants thiab txheej yuav tsum tau siv.

Rau nruab nrab lub tshuab nqus tsev ib puag ncig (nyob ib ncig ntawm 10-2mbar), nrog rau kev ua tib zoo tsim thiab xaiv cov roj av tshwj xeeb, cov kabmob uas xa lub neej ntev ntawm ntau tshaj 40,000 teev (kwv yees li 5 xyoos) ntawm kev siv txuas ntxiv mus, thiab ua haujlwm ntawm kev kub ceev, tuaj yeem ua tau. ua tiav.

Corrosion kuj

Cov kabmob uas tau npaj los siv rau hauv ib puag ncig corrosive yuav tsum tau teeb tsa tshwj xeeb vim lawv tuaj yeem raug cov kua qaub, alkalis thiab dej ntsev ntawm lwm cov tshuaj corrosive.

Khoom siv

Cov ntaub ntawv yog ib qho tseem ceeb rau kev corrosive ib puag ncig.Standard bearing steels nkag tau yooj yim corrode, ua rau ntxov bearing tsis ua hauj lwm.Nyob rau hauv rooj plaub no, SV30 cov khoom siv nplhaib nrog cov khoom siv ceramic yuav tsum raug txiav txim siab vim tias lawv muaj kev tiv thaiv corrosion heev.Qhov tseeb, cov kev tshawb fawb tau pom tias cov khoom siv SV30 tuaj yeem siv sijhawm ntev dua li lwm cov hlau tiv thaiv corrosion nyob rau hauv ib puag ncig ntsev tsuag.Hauv kev ntsuas tshuaj ntsev-tso tshuaj SV30 steel tsuas yog qhia me ntsis ntawm kev xeb tom qab 1,000 teev ntawm kev ntsuas ntsev ntsev (saib daim duab 1) thiab SV30's siab corrosion kuj tau pom meej ntawm cov nplhaib kuaj.Cov khoom siv tshwj xeeb ceramic pob xws li Zirconia thiab Silicon Carbide kuj tseem tuaj yeem siv los ua kom cov kabmob muaj zog ntxiv rau cov tshuaj corrosive.

Tau txais ntau dua los ntawm kev tshaj tawm lubrication

Qhov kawg nyuaj ib puag ncig yog cov ntawv thov uas cov xov xwm ua raws li cov roj nplua nyeem, piv txwv li cov tub yees, dej, lossis cov kua dej hydraulic.Nyob rau hauv tag nrho cov kev siv no cov khoom siv yog qhov tseem ceeb tshaj plaws kev txiav txim siab, thiab SV30 - ceramic hybrid bearings feem ntau tau pom los muab cov kev daws teeb meem zoo tshaj plaws thiab txhim khu kev qha.

Xaus

Ib puag ncig huab cua nthuav tawm ntau yam kev sib tw ua haujlwm rau cov qauv bearings, yog li ua rau lawv ua tsis tiav ntxov.Hauv cov ntawv thov no bearings yuav tsum tau ua tib zoo teeb tsa kom lawv haum rau lub hom phiaj thiab xa cov kev ua tau zoo ntev ntev.Txhawm rau kom muaj kev ntseeg siab ntawm bearings tshwj xeeb yuav tsum tau them rau lubrication, cov ntaub ntawv, txheej txheej thiab kev kho cua sov.