Kev nkag siab ntawm kev sib txhuam coefficient kev ua haujlwm ntawm cov pawm nres (1)
Qhov zoo ntawm cov brakes yog ncaj qha ntsig txog kev ntseeg siab ntawm lub tsheb nres. Ntxiv nrog rau 100 feem pua kev nyab xeeb, cov tswv tsheb kuj xav tau qhov zoo tshaj plaws braking kev nplij siab, teb, tsis muaj suab nrov thiab smoothness txhua lub sijhawm. Rau cov brakes, qhov tseem ceeb tshaj plaws yog kev xaiv cov khoom siv sib txhuam, uas yog txiav txim siab qhov kev ua haujlwm ntawm lub nres nres. Cov ntaub ntawv sib txhuam tuaj yeem muab faib ua plaub hom raws li cov ntaub ntawv yooj yim: asbestos, NAO hom (uas yog, asbestos-dawb organic hom), semi-hlau thiab fiber tshwj xeeb. Xyoo 1999, kuv lub tebchaws tau txwv tsis pub siv cov asbestos hauv cov ntawv sib txhuam. Tam sim no, cov ntaub ntawv sib txhuam ib nrab yog siv nyob rau hauv Suav teb, feem ntau yog cov hlau los yog tooj liab.
Kev ua haujlwm ntawm kev sib txhuam phaj yuav tsum muaj plaub yam kev cai:
1. Tsim nyog thiab ruaj khov kev sib txhuam coefficient. Kev sib txhuam coefficient yog ib qho tseem ceeb tshaj plaws kev ntsuas ntawm cov ntaub ntawv kev sib txhuam, uas txiav txim siab qhov yooj yim braking torque ntawm brakes. Feem ntau nws tsis yog qhov tas li, nws hloov pauv los ntawm qhov kub, siab, nrawm lossis lub xeev nto, kev sib txhuam ib puag ncig. Thaum cuam tshuam los ntawm cov xwm txheej no, kev sib txhuam coefficient hloov tsawg dua, uas yog qhov zoo tshaj plaws kev sib txhuam coefficient. Lub teb chaws tus qauv nruj me ntsis kom cov neeg tsim khoom los qhia cov coefficient ntawm kev sib txhuam ntawm lub ntim. Lub coefficient ntawm kev sib txhuam yuav tsum tsim nyog, yog tias nws siab dhau lawm, nws yuav ua rau lub log xauv, cov kev taw qhia poob ntawm kev tswj thiab hlawv discs thaum lub sij hawm braking, yog tias nws qis dhau, lub braking deb yuav ntev dhau. Piv txwv li, tus coefficient ntawm kev sib txhuam ntawm Bosch kev ruaj ntseg nres ncoo yog 0.39.
Thib ob, txhim khu kev qha ruaj ntseg. Lub nres nres yuav ua kom muaj kub ceev ceev thaum nres, tshwj xeeb tshaj yog thaum tsav tsheb ntawm kev kub ceev lossis nres thaum muaj xwm ceev. Thaum kub kub, qhov coefficient ntawm kev sib txhuam ntawm cov phaj txhuam yuav txo qis, uas yog hu ua thermal recession. Lub thermally decaying siab kub txiav txim siab txog kev nyab xeeb ntawm lub xeev kub kub thiab thaum muaj xwm ceev braking. Kev sib txhuam phaj tuav nws txoj kev ruaj ntseg thiab kev ua haujlwm rov qab nyob rau hauv ntau yam kev ua haujlwm, uas yog, nws yuav tsum tau ua kom muaj cua sov zoo, thiab nws tseem tuaj yeem ua haujlwm ruaj khov ntawm qhov kub thiab txias. Nws tsis tshua nkag siab hauv cov av sib txawv thiab tom qab tso rau hauv dej, thiab tuaj yeem rov qab sai li sai tau tom qab raug dej. kev ua tau zoo. Nyob rau tib lub sijhawm, nws yuav tsum muaj lub cev zoo thiab cov khoom siv kho tshuab, uas tuaj yeem tsis tsuas yog ua tau raws li qhov yuav tsum tau ua hauv cov txheej txheem ua haujlwm, tab sis kuj tseem muaj kev ua haujlwm zoo.
Peb, txaus siab rau kev nplij siab. Kev nplij siab yog qhov cuam tshuam ncaj qha ntawm kev sib txhuam kev ua haujlwm, suav nrog kev xav nres, suab nrov, plua plav, pa taws, thiab tsw ntxhiab tsw. Nrog rau kev nce ntawm cov tsheb ntiag tug thiab kev txhim kho ntawm tib neeg txoj kev ua neej nyob, raws li lub hauv paus ntsiab lus ntawm kev txaus siab rau kev nyab xeeb, kev nplij siab tau dhau los ua qhov taw qhia tseem ceeb ntawm kev sib txhuam daim hlau. Ntawm cov ntsuas kev nplij siab, cov tswv tsheb feem ntau txhawj xeeb txog lub suab nrov ntawm cov pawm nres. Qhov tseeb, suab nrov kuj yog qhov teeb meem nyuaj tshaj plaws rau txhua qhov kev sib txhuam cov khoom lag luam los daws. Lub suab nrov yog tsim los ntawm qhov txawv txav ntawm kev sib txhuam phaj thiab kev sib txhuam disc. Cov laj thawj rau lub suab nrov yog qhov nyuaj heev. Lub braking quab yuam, qhov kub ntawm lub brake disc, lub tsheb ceev thiab huab cua tej zaum yuav tag nrho cov ua rau lub suab nrov. Tsis tas li ntawd, qhov ua rau lub suab nrov sib txawv nyob rau hauv peb theem sib txawv ntawm kev pib braking, kev siv braking thiab kev tso tawm braking. Yog hais tias lub suab nrov zaus nyob nruab nrab ntawm 0-500Hz, lub tsheb yuav tsis hnov nws, tab sis yog tias nws siab tshaj 1500Hz, tus tswv yuav pom tau tias lub suab nrov ntawm lub braking.
4. Zoo hnav tsis kam, kev ntseeg tau thiab kav ntev. Qhov no yog qhov ntsuas tseem ceeb los ntsuas lub neej kev pab cuam ntawm cov ntaub ntawv sib txhuam, thiab nws tseem yog cov khoom lag luam uas cov neeg siv feem ntau them rau. Kev tuav lub zog kom txaus ntawm chav tsev kub thiab qhov kub thiab txias yog ib qho tseem ceeb cuam tshuam rau kev ntseeg siab ntawm kev sib txhuam hauv ob sab phlu, tab sis tib lub sij hawm nws yuav tsum tsis txhob khawb lub nres nres lossis lub nruas nres. Nws hnav tsis kam yog lub ntsiab tseem ceeb cuam tshuam rau durability. Lub ntsiab tseem ceeb cuam tshuam rau kev hnav hauv kev siv yog siab, ceev thiab kub, ntawm qhov kub thiab txias yog thawj. Lub nres nres pem hauv ntej feem ntau tuaj yeem lav qhov kev pab cuam lub neej ntawm 30,000-50,000 mais, thiab lub tsheb nres tsheb feem ntau tuaj yeem lav lub neej kev pabcuam ntawm 60,000-80,{{6} }km ua. Qhov loj-grained graphite thiab tooj dag siv nyob rau hauv cov ntaub ntawv nres nres kuj txo qhov hnav ntawm cov nres discs. Hauv particular, lub suab nrov thaum siv yog txo kom qis qis, kom tsis txhob muaj kuab paug rau ib puag ncig. Tsis muaj suab nrov thaum braking, thiab tsis muaj ntxhiab tsw ntawm qhov kub thiab txias.
