Composite crankcase tiv thaiv: yam ntxwv, txoj cai ntawm kev ua haujlwm, qhov zoo thiab qhov tsis zoo

2024 Tus sau: Erin Ralphs | [email protected]. Kawg hloov kho: 2024-02-19 16:10

Qhov xav tau rau nruab crankcase tiv thaiv tsis tau muaj kev sib cav los ntawm cov tswv tsheb ntev. Hauv qab ntawm lub tsheb npog ntau yam tseem ceeb, nrog rau kev sib kis, hloov rooj plaub, cav crankcase, chassis Cheebtsam thiab qhov chaw, thiab ntau ntxiv. Sib ntaus txhua yam teeb meem tuaj yeem ua rau lawv puas tsuaj. Txhawm rau zam qhov no, kev tiv thaiv crankcase raug teeb tsa - hlau lossis sib xyaw.

Txoj kev tiv thaiv kev sib xyaw

Cov khoom siv crankcase yog tsim los ntawm cov iav fiber reinforced polymer resin khoom. Cov yam ntxwv muaj zog nyob ntawm cov txheej txheem no. Rau txhua qhov kev tiv thaiv tshwj xeeb, qee cov txheej txheem thiab lawv cov tuab raug xaiv, uas cov ntsuas yav tom ntej nyob ntawm.

Cov duab geometric tsis yog tsuas yog lub zog ntawm kev tiv thaiv, tab sis kuj tseem tiv thaiv lub cav ntim ntawm cov dej noo thiab plua plav. Vim yog cov yam ntxwv ntawm cov khoom sib xyaw -Lub teeb yuag, siab lub cev thiab cov khoom siv kho tshuab, tiv thaiv corrosion thiab tshuaj lom neeg - kev tiv thaiv muaj qhov zoo tsis txaus ntseeg:

• Muab kev tiv thaiv crankcase zoo tshaj plaws ua tsaug rau cov duab uas ua raws li cov duab ntawm cov qauv anthers thiab cov txheej txheem ntawm chav nyob uas tsis txo cov av clearance thiab tsis hloov qhov kub thiab txias.
• High dabtsi yog khoov lub zog thiab nruj piv rau cov hlau counterparts.
• Lub yuag.
• Dav ua haujlwm kub ntau yam.
• Kev co zoo heev thiab lub suab rwb thaiv tsev.
• Resistant corrosion thiab tshuaj siv hauv kev kho mob.

Nyob rau hauv kev sib tsoo pem hauv ntej thiab kev thauj khoom ntau dhau, kev tiv thaiv crankcase sib xyaw raug puas tsuaj, tsis tiv thaiv lub cev los ntawm kev txav mus los.

Cov khoom sib xyaw khaws cia nws cov khoom nyob rau hauv qhov kub thiab txias ntawm +120 txog -60 degrees thiab tsis tawm cov khoom phom sij thaum cua sov. Cov khoom siv raw siv hauv kev tsim khoom muaj tag nrho cov ntawv pov thawj tsim nyog huv thiab kis kab mob.

Nyob rau hauv nuances

Qhov elasticity ntawm crankcase tiv thaiv ua los ntawm cov ntaub ntawv sib xyaw ua ke cov loads tawm ntawm nws thaum muaj kev cuam tshuam thiab kev sib tsoo nrog obstacles. Yog li ntawd, cov yas deformation tsis tuaj yeem ua tiav, uas tso cai rau koj ua haujlwm txuas ntxiv yam tsis muaj kev hloov pauv. Piv nrog rau cov khoom siv hlau uas yuav tsum tau hloov pauv hauv qhov xwm txheej zoo ib yam, cov ntaub ntawv sib xyaw tsis muaj qhov cuam tshuam tsis zoo acoustic thiabkhaws lawv cov yam ntxwv tseem ceeb yam tsis tau rhuav tshem cov sib sau ua ke thiab cov rooj sib txoos.

Qhov txawv ntawm tus nqi ntawm cov hlau thiab kev tiv thaiv kev sib xyaw

Composite crankcase yog kim dua hlau vim qhov nyuaj ntawm kev tsim khoom thiab qhov tsis sib xws ntawm cov khoom siv raw. Kev tsim cov qauv ntawm cov hlau thiab txhuas tsis xav tau cov khoom siv kim thiab nyuaj - nqus, txhaj tshuaj thiab ua haujlwm. Kev tiv thaiv kev sib xyaw yog tsim los ntawm cov khoom siv raw khoom - fiberglass, resins, modifiers thiab hardeners.

Kev faib tawm

Muaj ntau hom kev tiv thaiv sib xyaw nyob ntawm cov khoom siv txhawb zog, uas yog ib feem ntawm lawv cov muaj pes tsawg leeg thiab uas txiav txim siab cov khoom siv kho tshuab:

• Kevlar (aramid fiber).
• Fiberglass.

Kevlar tiv thaiv

Cov qauv Kevlar yog tsim los ntawm luv luv para-aramid fibers faib hauv cov thermosetting yas. Lub zog txhua yam ntawm cov thermoplastics txawv nyob ntawm seb hom khoom siv raw; tawg lub zog ntawm fibers - los ntawm 280 mus rau 550 kg / mm². Nyob rau tib lub sijhawm, nws tau ua ke nrog qhov ntom ntom - txog li 1500 kg / m ^{3. Qhov hnyav tsis tseem ceeb ntawm kev tiv thaiv crankcase feem ntau yog txiav txim siab los ntawm cov ntsuas no.}

Cov npe nrov tshaj plaws ntawm para-aramid fiber ntau yog Kevlar, tsim los ntawm DuPont, thiab Twaron, los ntawm Japanese-Dutch tuam txhab Teijin.

Hauv xyoo 2007, Heracron-branded Kevlar tau tshwm sim hauv khw. South Korean tuam txhab Colon Industries.

Cov Qauv Kevlar muaj cov thermal stability thiab tshuaj lom neeg. Lub zog ntawm para-amide yog 2.5 npaug ntau dua lub zog ntawm cov hlau, uas muab lub zog siab sib xyaw crankcase tiv thaiv. Tsis zoo li fiberglass, Kevlar muab kev poob siab zoo heev.

tiv thaiv carbon

Carbon fiber, lossis carbon, yog tsim los ntawm polymer resins ntxiv nrog carbon fiber filaments. Hauv kev tsim cov kev tiv thaiv, carbon fiber yog siv tsis tshua muaj vim qhov tseeb tias nws cov nqi siab dua, thiab kev tsim khoom qis dua.

Cov qauv ntawm matrix thiab txoj kev tso carbon fiber cuam tshuam rau cov khoom ntawm carbon fiber. Nyob ntawm qhov xwm txheej tshwj xeeb thiab xav tau, cov pa roj carbon tuaj yeem ua kom nruj lossis hloov tau.

Tus nqi siab ntawm carbon yog txiav txim siab los ntawm qhov nyuaj ntawm nws cov thev naus laus zis ntau lawm. Cov txheej ntawm cov khoom yog glued nrog high-zoo thiab kim resins. Cov cuab yeej xav tau los tsim cov pa roj carbon monoxide kuj tseem kim.

CFRP yog 1.5 npaug zog dua hlau ntawm qhov hnyav dua.

Ib qho tsis zoo ntawm cov pa roj carbon monoxide yog nws qhov tsis txaus ntseeg rau qhov cuam tshuam: tom qab kev puas tsuaj, kev tiv thaiv tsis tuaj yeem rov qab los. Yog tias muaj qhov tsis xws luag, koj yuav tau hloov qhov kev tiv thaiv tag nrho.

Fiberglass tiv thaiv

Feem ntau Toyota composite crankcases yog tsim los ntawm fiberglass, ib qho ntawm feem ntauthov cov ntaub ntawv. Cov khoom siv ntxiv hauv fiberglass yog fiberglass ntaub, lossis quartz. Cov fiberglass matrix yog ua los ntawm cov thermoplastic thiab thermosetting polymers.

Fiberglass tiv thaiv yog ib qho hnyav tshaj plaws hauv nws qeb.

Lub ntsiab lus ntawm Land Rover's fiberglass composite crankcase yog nws cov thermal conductivity tsawg. Nws yog resistant rau mechanical puas thiab translucent. Lub zog ntawm fiberglass yog corrosion kuj, zoo tuav thiab tsis raug tshav kub.

Lub zog ntawm fiberglass tiv thaiv qis dua cov hlau, tab sis qhov hnyav ntawm fiberglass kuj yog peb zaug qis dua.

Steel crankcase yog pheej yig dua fiberglass.

Qhov zoo ntawm kev tiv thaiv sib xyaw

Raws li cov lus tawm tswv yim ntawm kev tiv thaiv crankcase, ntau qhov zoo tuaj yeem paub qhov txawv:

• High lub zog qhov chaw. Tsis zoo li kev tiv thaiv hlau, cov khoom sib xyaw tiv taus 1.5-2.5 npaug ntau dua load.
• Lub teeb yuag ntawm cov khoom sib xyaw. Qhov siab tshaj plaws ntawm kev tiv thaiv sib xyaw yog 12 millimeters.
• Yuav luag tsis muaj suab nrov ntawm hom kev tiv thaiv no.
• Tsis zoo li hlau, kev tiv thaiv sib xyaw tuaj yeem muab cov duab geometrically complex.

Flaws

Nyob rau tib qhov kev tshuaj xyuas ntawm kev tiv thaiv crankcase sib xyaw, txawm li cas los xij, qhov tsis muaj zog ntawm cov khoom kuj tau sau tseg:

• High fragility ntawm kev tiv thaiv, uascuam tshuam qhov susceptibility ntawm point loads.
• Nws tsis tuaj yeem ntxiv ob peb lub qhov cua ntxiv yam tsis txo qis kev ruaj ntseg.
• Tsis ua raws li qhov yuav tsum tau ua ntawm ib puag ncig - thaum cua sov, lawv tso cov tshuaj phem.

Yuav ua li cas xaiv crankcase tiv thaiv

Thaum xaiv lub crankcase sib xyaw, qhov kev nyab xeeb ntawm thaj av thiab kev tsav tsheb yog feem ntau coj mus rau hauv tus account. Ib hom kev tiv thaiv tus kheej yog tsim rau yuav luag txhua lub tsheb, tab sis nws yog ib qho tseem ceeb los txiav txim siab qhov tuab ntawm cov khoom. Qhov kev ntsuas no nyob ntawm lub hom phiaj ntawm kev tiv thaiv thiab cov khoom siv los ntawm nws tau tsim. Thickness feem ntau cuam tshuam rau kev ruaj ntseg.

Qhov thib ob qhov tseem ceeb yog qhov hnyav ntawm cov khoom: cov khoom hnyav dhau los ntawm lub tsheb teeb tuaj yeem cuam tshuam rau qhov zoo thiab qhov zoo ntawm aerodynamic.

Qhov thib peb parameter yog qhov zoo tau lees paub los ntawm cov tuam ntxhab. Cov kws tshaj lij qhia kom yuav cov khoom sib xyaw tiv thaiv ntawm cov npe nrov, thiab nruab nws tsuas yog hauv cov kev pabcuam tsheb. Los ntawm kev soj ntsuam cov nuances ntawm cov txheej txheem installation, muaj kev tiv thaiv zoo.

Tus yam ntxwv kawg yog tus nqi ntawm cov khoom. Cov qauv hlau yog suav tias yog cov kev xaiv pheej yig tshaj plaws thiab nrov tshaj plaws, tab sis txawm li cas los xij, kev tiv thaiv kev sib xyaw ua tau zoo dua thiab muaj txiaj ntsig.