Qhov tseem ceeb ntawm cov roj hmab O-ring yog daim ntawv thov kub, qhov kub thiab txias yuav ua rau cov khoom siv roj hmab aging. Qhov siab dua qhov kev khiav hauj lwm kub, qhov ntau dua qhov deformation mus tas li ntawm O-ring contraction. Thaum lub deformation mus tas li tshaj 40 feem pua, O-ring poob nws sealing, ua rau to. Vim yog shrinkage deformation, tus nqi pib ntawm kev ntxhov siab tsim nyob rau hauv cov ntaub ntawv O-ring roj hmab yuav maj mam tsaws thiab txo qis nrog kev cuam tshuam ntawm cov txheej txheem aerodynamic thiab kub tsaws ntawm O-ring.
Vim tias qhov kub thiab txias poob qis, qhov qub kev cog lus ntawm O-rings ua haujlwm ntawm qhov kub qis qis yuav raug txo los yog tag nrho. O Feem ntau siv cov nplhaib sib khi, sim xaiv ib feem loj ntawm O-ring. Nyob rau hauv tib rooj plaub, lub ntim ntawm O-ring nyem rau hauv qhov khoob yuav tsum qis dua qhov siab tshaj plaws. Silicone sealing nplhaib yog ua los ntawm cov khoom ntxeem tau, tuaj yeem nqus tau ntau yam tshuaj, yog tus neeg sawv cev zoo noo noo, absorbent thiab catalyst cab kuj. Lub adsorption ntawm silica gel feem ntau yog lub cev adsorption thiab tuaj yeem rov tsim dua thiab rov siv dua. Nyob rau hauv alkaline hlau silicate (xws li sodium silicate) tov rau ntxiv kua qaub, acidification, thiab ces ncuav ib co ntawm cov electrolyte tov, ua los ntawm silicate suspicious kua nplaum; Los yog ntxiv cov kua qaub lossis ammonium ntsev rau cov tshuaj sodium silicate tseem tuaj yeem tsim cov kua nplaum silicate. Nyob rau hauv rooj plaub ntawm -50 ~ -60 degree, cov khoom siv roj hmab yuav poob qhov kev ntxhov siab thawj zaug. Txawm tias cov khoom siv roj hmab uas tsis muaj qhov kub thiab txias, qhov kev ntxhov siab thawj zaug yuav tsis tshaj 25 feem pua ntawm qhov kev ntxhov siab thaum pib ntawm 20 degree. Qhov no yog vim hais tias tus thawj nruj npaum li cas ntawm O-ring nyob ntawm tus coefficient ntawm expansion. Yog li ntawd, thaum xaiv tus thawj nruj npaum li cas, nws yog tsim nyog los xyuas kom meej tias muaj txaus sealing muaj peev xwm tom qab qhov kev nyuaj siab tsaws tshwm sim los ntawm qhov kub thiab txias tsaws nyob rau hauv txoj kev nyuaj siab tsaws. Rau O-rings ua haujlwm ntawm qhov ntsuas kub qis, kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov ntsuas rov qab thiab deformation Performance index ntawm cov khoom siv roj hmab.
Feem ntau hais lus, hauv kev tsim qauv, peb yuav tsum sim ua kom ntseeg tau tias O-ring muaj qhov ua haujlwm zoo, lossis siv cov ntaub ntawv kub thiab qis O-ring los txhim kho lub neej kev pabcuam. Cov khoom siv silicone nrog silicone ua cov khoom siv tseem ceeb yog hu ua cov khoom siv silicone. Silica gel yog cov khoom ntxeem tau ntawm ntau qhov ntau thiab tsawg, ua los ntawm silicone acid suspicious kua nplaum. Nws yog ib tug zoo noo-pov thawj tus neeg saib xyuas nrog qhib ntxeem tau cov ntaub ntawv uas yuav adsorb ntau yam khoom, absorbent thiab catalyst cab kuj.
