Yuav ua li cas khi ib tug ncej?
Lub luag haujlwm tseem ceeb ntawm ib qho sealant yog los tiv thaiv cov kua dej los ntawm kev xau tawm ntawm ib qho chaw kaw. Ib yam yog qhov tseeb rau cov ntsaws ruaj ruaj, uas ntxiab roj ntawm ob qho tib si nyob ruaj ruaj thiab rotating ncej. Txhawm rau ua lawv txoj haujlwm zoo, lawv yuav tsum tau tsim kom zoo thiab nruab nrog cov khoom sib khi uas tiv taus hnav thiab kub hloov pauv. Qhov kawg - uas tsim nyog paub - muaj lwm txoj haujlwm tseem ceeb. Qhov no tiv thaiv cov roj nws tus kheej los ntawm sab nraud impurities thiab ya raws.
Lawv ua li cas?
Ib qho ntawm cov ntsiab lus tseem ceeb ntawm qhov nrov tshaj plaws boil ncej foob yog lub nplhaib hlau. Nws muab cov qauv kev txhawb nqa tshwj xeeb rau cov khoom sib khi kom zoo. Tsis tas li ntawd, lub luag haujlwm tseem ceeb yog ua los ntawm lub caij nplooj ntoos hlav, uas nias lub sealing di ncauj tawm tsam lub ncej nrog lub zog tsim nyog. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum cov ncej tig, vim qhov no yog qhov loj tshaj qhov kev pheej hmoo ntawm cov roj tsis tuaj yeem tshwm sim. Cov tom kawg tsis tuaj yeem tawm vim qhov tsim nyog ntawm lub sealing ntug, nrog rau kev siv lub npe hu ua. dynamic meniscus nyhuv.
NBR thiab tej zaum PTFE?
Cov ntsaws ruaj ruaj siv cov ntaub ntawv sib txawv nyob ntawm qhov piv txwv. sealant qhov chaw, kev khiav hauj lwm tej yam kev mob (xws li roj siab thov rau lub sealant), thiab kev khiav hauj lwm kub. Vim li no, fluidized ncej ntsaws ruaj ruaj muaj ntau hom sealing cov ntaub ntawv, los ntawm nitrile roj hmab (NBR) mus rau polytetrafluoroethylene (PTFE). Lub undoubted kom zoo dua qub yog heev hnav tsis kam nrog zoo kam rau ua rau kub hloov nyob rau hauv thaj tsam ntawm -40 rau +100 degrees C. Nyob rau hauv lem, polytetrafluoroethylene sealants yuav siv tau nyob rau hauv ntau yam tsis zoo kub tej yam kev mob, vim hais tias -80 txog +200 ° C. Lawv kuj pom tias muaj roj ntau heev, thiab tib lub sij hawm muaj kev cuam tshuam ntau dua rau hnav piv rau cov ntsaws ruaj ruaj raws li cov roj hmab nitrile. Qhov ntau ntawm cov ntsaws ruaj ruaj tseem suav nrog lwm cov kev hloov kho ntawm cov roj hmab: polyacrylic thiab fluoride. Nyob rau hauv lawv cov ntaub ntawv, qhov kom zoo dua yog siab tsis kam mus rau high kub, nrog rau nruab nrab kam rau ua rau qis kub (nyob rau hauv thaj tsam ntawm -25 mus rau -30 ° C). Fluoroelastomer seals kuj tseem muaj roj resistant.
Thawj tiam thib ob?
Cov ntsaws ruaj ruaj yog tus cwj pwm los ntawm qhov hu ua directionality. Nws yog dab tsi? Yog hais tias tus ncej tig mus rau sab xis, peb tab tom tham txog lub foob sab xis. Txwv tsis pub, sab laug-tes ntsaws ruaj ruaj raug ntsia. Tam sim no muaj ob tiam ntawm boiling seals nyob rau hauv ncej seals. Lawv tau ua tib zoo xaiv coj mus rau hauv tus account, tshwj xeeb tshaj yog, tsim, qauv thiab xyoo ntawm lub tsheb, nrog rau qhov tsis sib xws ntawm sealant nws tus kheej, xws li thickness thiab diameters: sab hauv thiab sab nraud. Nyob rau hauv cov ntaub ntawv ntawm thawj tiam sealants, sealing daim di ncauj nrog 3 los yog 4 notches yog siv. Lawv qhov tsis zoo, uas cov tiam tom ntej tsis muaj lawm, yog lub convex sealing ntug. Qhov tsis yooj yim no yog qhov tshwj xeeb tshaj yog pom thaum sib dhos lub foob, thaum yuav tsum tau saib xyuas tshwj xeeb kom nws cov ntug tsis khoov. Qhov teeb meem no tsis muaj nyob nrog cov cim thib ob. Lub sealing daim di ncauj yog tiaj tus thiab sib dhos yog yooj yim heev: tsuas yog xaub lub foob mus rau lub ncej, tsis muaj cov cuab yeej tshwj xeeb yuav tsum tau. Tsis tas li ntawd, nws ntug yog 5- lossis 6-toothed. Txawm li cas los xij, nco ntsoov muab lub sealant kom raug rau hauv qhov flare. Lub tswv yim yog tshem tawm nws txoj kev txav mus los thiab qhov hu ua axial caij nplooj ntoos hlav.
