O-shaped rubber sealing nplhaib, uas ua lub luag haujlwm sib khi hauv ntau yam khoom siv tshuab, feem ntau xav kom nws cov khoom siv roj hmab yuav tsum muaj elasticity zoo, tsis tshua muaj compression teeb thiab aging kuj. Tsis tas li ntawd, cov cuab yeej siv tshuab sib txawv thiab kev sib khi xov xwm sib txawv, thiab cov khoom siv roj hmab kuj yuav tsum muaj qee yam khoom tshwj xeeb.
Nyob rau hauv hydraulic system, cov roj hmab compound yuav tsum muaj cov roj zoo, kub tsis kam, tsis tshua muaj compression teeb thiab qee lub zog tensile. Raws li lub foob dynamic, ntxiv rau cov kev xav tau saum toj no, kev hnav tsis kam thiab tsim kua muag ntawm cov compound yuav tsum tau xav txog. Cov ntsaws ruaj ruaj siv nyob rau hauv lub tshuab nqus tsev ib puag ncig yuav tsum tau zoo huab cua nruj thiab tsawg volatility.
Cov ntsaws ruaj ruaj siv rau cov xov xwm tshwj xeeb yuav tsum tau hloov me me hauv ntim thiab hardness ntawm cov roj hmab hauv nruab nrab, thiab kev hloov me ntsis ntawm lwm yam khoom. Nyob rau hauv luv luv, tus qauv tsim yuav tsum tau muab xam raws li cov kev ua hauj lwm tej yam kev mob, nruab nrab hom, siv kub, ua hauj lwm siab thiab daim ntawv thov lub xeev. Los ntawm cov kev cai thiab kev siv ntawm O-ring seals, nitrile roj hmab siv cov roj hmab ntau tshaj plaws, ua raws li cov roj hmab fluorine, neoprene roj hmab thiab silicone roj hmab, thiab acrylate roj hmab thiab ethylene propylene roj hmab yog siv me me.
Raws li qhov sib txawv ntawm qhov sib txawv hauv qhov system sealing, O-ring sealants nrog qhov sib txawv hardness yog tsim raws. Yog hais tias lub siab yog siab, high-hardness roj hmab yuav tsum tau siv, thiab yog hais tias lub siab yog tsawg, medium-hardness los yog low-hardness roj hmab yuav tsum tau siv. Yav dhau los, tsis txaus siab tau them rau qhov nyuaj ntawm cov roj hmab sib xyaw siv rau O-ring seals, thiab kev siv tsis meej pem. Muaj ntau qhov teeb meem tshwm sim vim qhov tsis zoo ntawm kev sib tw hardness, xws li kev ua haujlwm tsis zoo ntawm cov ntsaws ruaj ruaj thiab lub neej ua haujlwm luv luv.
Raws li kev txheeb xyuas, qee qhov yog cov teeb meem zoo ntawm cov tuam txhab tsim khoom, tab sis kuj tseem muaj ntau yam kev puas tsuaj thaum ntxov los yog xau los ntawm kev xav tsis zoo ntawm hardness ntawm cov roj hmab compound. Txhawm rau txhim kho cov khoom zoo thiab kev pab cuam lub neej, lub hardness ntawm cov roj hmab compound tau raug serialized nyob rau hauv lub teb chaws tus qauv. Piv txwv li, cov roj hmab nitrile siv nyob rau hauv hydraulic system, tshwj tsis yog rau cov kev cai tshwj xeeb, muaj plaub hardnesses: 60 degree ± 5 degree, 70 degree ± 5 degree, 80 degree ± 5 degree, 88 degree ± 5 degree (Shore A) Hardness theem kom haum cov kev xav tau sib txawv. Feem ntau, 60-70 yog qhov hardness tsawg, 80 yog nruab nrab hardness, thiab 88 yog siab hardness. Thaum lub sealing siab nyob rau hauv thaj tsam ntawm 30-60MPa, lub hardness ntawm O-ring foob yog 85-90.