Deciphering Compression Teem Caij: Ib qho taw qhia tseem ceeb uas cuam tshuam rau kev sib khi ua tau zoo
Hauv kev siv cov ntawv thov kev muaj, kev ua tau zoo ntawm cov tshuab roj hmab ncaj qha ncaj qha rau cov nyhuv sib khi thiab kev pabcuam lub neej. Raws li ib qho ntawm cov cim tseem ceeb, lub compression teeb tsis tsuas yog qhia txog kev ntseeg rov qab ntawm daim foob tom qab lub sij hawm ntev compression. Kab lus no yuav tshawb xyuas qhov taw qhia tseem ceeb no hauv qhov tob ntawm cov ntsiab lus ntawm kev tshawb fawb, thiab muab kev lag luam siab rau kev lag luam.
Teeb tsa kev teeb tsa: Kev txhais thiab tseem ceeb
Kev teeb tsa kev teeb tsa hais txog tus nqi ntawm cov nyiaj seem (feem ntau qhia raws li feem pua) nyob rau hauv uas cov khoom siv roj hmab tom qab tau compressed rau qee lub sijhawm, ntsuas kub, thiab siab. Qhov siab dua tus nqi, qhov tsis zoo ntxiv qhov muaj peev xwm ntawm cov khoom siv tom qab lub sijhawm sib tw ntev, uas yuav ua rau tsis ua haujlwm, tsis muaj teeb meem.
For example, the compression set of natural rubber (NR) is 10%-25% at room temperature, but may rise to 30%-50% at high temperatures (70-100 degree ); Silicone roj hmab (VMQ), ntawm qhov tod tes, khaws tau qhov tsis tshua muaj hnub kub ntawm 15%}}
Tsib Qhov Tseem Ceeb cuam tshuam rau kev teeb tsa compression
Cov Khoom Hom thiab Cov Qauv Tshuaj
Cov molecular saw qauv ntawm cov roj hmab sib txawv substrates ncaj qha cuam tshuam rau lawv txoj kev xav tau:
Cov roj hmab ntuj (NR): siab elasticity tab sis tsis muaj kev txom nyem tiv, haum rau chav ntsuas kub.
FluoroelAlastomer (FKM): Cov tshuaj kub thiab cov tshuaj tua kab mob siab, tab sis qis qis (20% {% ntawm chav tsev kub).
Silicone roj hmab (VMQ): Kev ruaj khov zoo tshaj plaws, deformation tus nqi ntawm tsuas yog 15% {% ntawm 200 degree, haum rau aerospace ntsaws ruaj ruaj.
Cov txheej txheem vulcanization thiab cov khaub lig crosslinking
Cov qib ntawm vulcanization thiab hom cross-txuas tau cuam tshuam rau cov khoom siv:
Kev sib txuas siab sib txuas cov tuab (piv txwv li, peroxide vangianization tshuab) txo cov nqi sib tw (cov kev sim tau pom muaj kev txo ntawm 20%).
Lub compression teeb ntawm tus qauv nyiaj polysulfide ntau dua li cov pa roj carbon-carbon-yuav tsum tau xaiv raws li daim ntawv thov kev pab.
Cov muab tub lim thiab cov qauv tsim qauv
Hom haujlwm hom: koob lossis ntxaiv cov fillers (piv txwv li, magnium carbonate) muaj txiaj ntsig zoo dua li spherical carbon dub los txo distortion.
Kua nplaum cov ntsiab lus: Cov Qauv Nrog Tsawg Dua cov ntsiab lus (<30%) usually have less deformation due to more fillers and compact structure.
Ib puag ncig ib puag ncig
Kev ntsuas kub siab, tshuaj lom neeg, thiab lub siab tas li tuaj yeem exacerbate muaj peev xwm excormation ruaj khov:
Muaj qhov kub nyob ntxiv nce qhov kev muaj zog ntawm cov molecular chains, uas ua rau muaj kev txo qis hauv cov roj hmab (piv txwv li, cov roj hmab nitrile tuaj yeem ua kom txog 60% ntawm 150 degree).
Tshuaj lom neeg corrosion: roj lossis acid-alkali media tuaj yeem ua rau o lossis embrittlement, yog li tshuaj lom neeg yuav tsum tau xaiv.
Kev laus thiab nkees
Ultraviolet lub teeb, ozone, thiab oxidation tuaj yeem cuam tshuam cov molecular chains thiab accelerate excormation. Ntxiv cov tshuaj antioxidants thiab UV Stabilizers txhim kho cov laus tiv taus thiab txo cov nqi deformation li 5%.
Txhim Kho Rau Lub Tswv Yim: Yuav Ua Li Cas Txo Kev Teeb
Xaiv Xaiv Cov Khoom thiab Kev Tsim Qauv
Kev Kub Siab Tshaj Tawm: Silicone Roj Hmab lossis FluoroelosTomer yog qhov zoo dua.
Tshuaj lom neeg tiv thaiv: Nitrile Roj Hmab (NBR) lossis hydrogenated nitrile roj hmab (HNBR) yog qhov haum rau cov xov xwm.
Tus piv sib piv: Tswj seb cov pa roj carbon dub kom tsis txhob muaj kev ua haujlwm ntau thiab txo qis elasticity thiab txo qis elasticity thiab txo qis elasticity thiab txo qis elasticity thiab txo elasticity.
Txhim Kho Txheej Txheem
Ntau txheej txheem vulcanization txheej txheem: Kev tswj kom meej ntawm vulcanization kub thiab sijhawm kom sib npaug sib npaug ntom ntom thiab elasticity.
Kev kho mob tom qab Vulcanization: Qhov kev ua kom sib luag ntawm kev sib cav sib ceg thiab txhim kho kev ruaj khov.
Tsim haum
Compression control: When designing seals, it is recommended to control the compression ratio at 15%-25% to avoid excessive deformation.
Kev ua kom zoo ntawm cov qauv kev txhawb nqa: ntxiv stiffeners lossis composite txheej txheej txheem kev tawg cov hluav taws xob hauv zos.
Xaus: Xaiv tus kws tshaj lij kom ntseeg tau tias ntev-ntev sealing
Lub teeb nyem nias tau siv los ntsuas cov kev ua tau zoo ntawm cov tshuab roj hmab, uas yuav tsum tau nkag siab txog kev ua kom tiav los ntawm ntau cov khoom siv, txheej txheem, thiab tsim qauv. Los ntawm kev xaiv science thiab customized daws, qhov kev ntseeg ruaj khov, kev ntseeg tau zoo, thiab cov cuab yeej siv txij nkawm yuav raug txo kom tsawg.
Tiv tauj peb txog hnub no kom paub ntau ntxiv txog kev ua haujlwm siab rau koj daim ntawv thov lossis kom paub ntau ntxiv txog cov ntsiab lus txuj ci!