Kev tsim kho tshuab hydraulic kis tau tus mob nyob rau hauv lub ntsiab Cheebtsam xws li gearbox torque converter (hu ua ob chav hloov) thiab lub chaw ua hauj lwm hydraulic system nyob rau hauv lub multi-txoj kev reversing valve nrog O-ring thiab lwm yam seals, feem ntau ntawm lawv tau siv fluorine roj hmab (FKM) rau sealing cov khoom muaj ib tug zoo roj kuj, puas kuj thiab kuj mus rau high kub thiab thiaj li nyob rau hauv kev txiav txim kom muaj nuj nqis. Txawm li cas los xij, vim muaj cov ntsaws ruaj ruaj, tus nqi siab, tsis zoo rau rancidity deterioration ntawm roj, txias tsis kam thiab lwm yam tsis zoo, ua rau tus nqi ntawm cov khoom nce, thiab cuam tshuam rau kev muag khoom ntawm cov khoom, yog li nws yog ib qho tsim nyog yuav tsum nrhiav kev lag luam thiab ruaj khov sealing khoom es tsis txhob ntawm cov khoom sib khi uas twb muaj lawm.
HNBR thiab Nws Cov Khoom
HNBR yog ib hom tshiab roj-resistant elastomer qhia los ntawm Nippon Zeon nyob rau hauv 1984, uas yog tsim los kom tau raws li qhov yuav tsum tau ceev rau cov roj hmab fittings nyob rau hauv hnyav hnyav nyob rau hauv lub tsheb kev lag luam. Nws yog cov roj zoo heev ntawm nitrile roj hmab (lub npe npe NBR) cov qauv molecular ntawm carbon-carbon ob daim ntawv cog lus xaiv hydrogenated (saturated) ua ntawm cov qauv molecular hloov, hloov NBR tshav kub-resistant, maroon tshuaj stability ntawm cov neeg pluag tsis muaj zog, zoo heev lub zog thiab tsis kam mus rau siab thiab tsis kub, tsis kam mus rau roj thiab tshuaj lom neeg kev lag luam xws li kev sib npaug zoo heev, tshwj xeeb thiab kev ua haujlwm. Nyob rau tib lub sijhawm tswj hwm kev hnav zoo heev thiab kev ua haujlwm ntawm NBR. Piv nrog FKM thiab NBR
HNBR cov yam ntxwv tseem ceeb ntawm kev ua haujlwm yog raws li hauv qab no:
(1) Kev hloov pauv kub: HNBR tuaj yeem siv rau lub sijhawm ntev ntawm l50 ℃ , siv sijhawm luv luv ntawm qhov kub txog li 75 ℃.
HNBR, tuaj yeem siv rau lub sijhawm ntev ntawm 230 ℃ , siv sijhawm luv luv ntawm qhov kub txog li 300 ℃ . HNBR tshav kub tsis kam ntawm NBR thiab FKM, tab sis nyob rau hauv cov nqe lus ntawm qhov kub thiab txias tsis kam, FKM lub txias kuj tsis zoo (-15 ℃ uas yooj yim rau brittle puas); thiab HNBR muaj qhov ua tau zoo ntawm qhov kub thiab txias, nrog qhov sib npaug zoo ntawm cov roj tsis kam
(2) Lub cev thiab lub cev muaj zog: roj hmab feem ntau tiv taus vim tsis muaj zog tensile, yog li nws txwv tsis pub dhau ntawm nws daim ntawv thov, xws li FKM tensile lub zog ntawm 19.6-21.6MPa, HNBR lub zog tshaj NBR, ACMXNBR, EPDM thiab FKM thiab lwm hom roj hmab siab dua, xws li Zeon ZSCPa roj hmab muaj zog ntau dua li cov roj hmab tseem ceeb, xws li Zeon ZSCPa roj hmab tseem ceeb dua. HNBR ntawm qhov kub thiab txias (Qhov tseem ceeb tshaj, HNBR ntawm qhov kub thiab txias (15O ℃ ) nyob rau hauv lub zog (14.7-29.4MPa) thiab chav tsev kub NBR kom tswj tau cov qib zoo tib yam ntawm qhov kub thiab txias hauv ntau yam roj thiab tshuaj lom neeg muaj peev xwm tseem tuav tau zoo heev txhua yam khoom, siab kub lub cev thiab cov cuab yeej cuab tam zoo dua li feem ntau ntawm lwm yam zoo elasticing lub cev.
Kev sib xyaw ua ke ntawm kev siv tshuab, koj tuaj yeem tau txais kev ua haujlwm siab kub compression mus tas li deformation kev ua tau zoo, thiab qhov kev ua tau zoo ntawm FKM tsis zoo li.
(3) chemical media resistance: HNBR muaj cov roj ua haujlwm zoo ntawm qhov kub thiab txias, tsis kam mus rau ntau yam lubricants hydraulic roj, roj roj uas muaj ntau yam additives, muaj zog corrosive oxidizing roj thiab hlau slag kev ua tau zoo, thiab muaj ozone kuj zoo heev, kub-kub hluav taws xob tiv thaiv thiab dej kub.
Los ntawm cov yam ntxwv saum toj no ntawm HNBR, piv nrog FKM, yav dhau los zoo tag nrho kev ua tau zoo, FKM, txawm hais tias nyob rau hauv lub tshav kub tsis kam, roj tsis kam, tsis kam mus rau combustion roj yog zoo dua li HNBR, tab sis HNBR nyob rau hauv lub kub ua hauj lwm ntawm lub mechanical zog ntawm chav ua hauj lwm, kuj rau roj additives, kuj oxidation thiab rancidity degradation ntawm cov roj thiab lwm yam tshuaj muaj zog, xws li FKM. Tsis tas li ntawd, FKM nyob rau hauv kev tsim thiab molding txheej txheem vim tsis zoo fluidity ntawm cov khoom, raw cov ntaub ntawv thiab cov khoom ua tau zoo tsis ruaj khov, yog li nws cov nqi. Tsis tas li ntawd, FKM tseem kim dua nyob rau hauv cov txheej txheem ntawm kev tsim thiab molding vim cov khoom siv tsis zoo, cov khoom siv tsis ruaj khov thiab cov khoom ua tau zoo, thaum HNBR tsis tshua kim dua FKM vim cov khoom zoo molding thiab kev ua haujlwm, kev ua haujlwm ruaj khov thiab qis dua.
Daim ntawv thov xwm txheej ntawm HNBR thiab kev tshuaj xyuas ntawm nws daim ntawv thov hauv kev tsim kho tshuab
Vim muaj kev ua tau zoo ntawm HNBR, nws tau siv dav hauv ntau yam los hloov FKM hauv txawv teb chaws: nws tau siv hauv kev lag luam tsheb los tsim tsheb crankshaft pem hauv ntej thiab nram qab thiab gearbox roj foob, H-hom ncej ntsaws ruaj ruaj, ntsaws ruaj ruaj rau roj txhaj tshuaj, piston lub tog raj kheej vibration damping seals, carburetor thiab lwm yam. thiab nyob rau hauv metallurgical kev lag luam, nws yog siv nyob rau hauv lub tsim ntawm metallurgy high-line dov zeb qag txoj kab uas hla ob-sided seals, thiab cov ntsaws ruaj ruaj rau kiv cua-zoo li tus kheej kheej kheej kheej nyob rau hauv domestic nruam casting tshuab; thiab nyob rau hauv kev lag luam oilfield, nws yog siv nyob rau hauv lub tsim ntawm drilling rigs, thiab cov ntsaws ruaj ruaj rau drilling rigs. Hauv kev lag luam oilfield, lawv tau siv los ua lub foob ntawm cov tho me ntsis tiv thaiv rau kev sib tsoo lub taub hau sealing, roj ntsaws twj tso kua mis sealing, thiab lwm yam.
Rau loaders thiab lwm yam kev tsim machinery, nws hydraulic kis tau tus mob Cheebtsam xws li gearboxes, torque converter nyob rau hauv ib txwm ua hauj lwm qhov kub thiab txias theoretically 8O-90 ℃ , lub siab tshaj plaws tsis tshaj 120 ℃ , tab sis xws li ntev teev ntawm overloaded ua hauj lwm. Txog li lossis ntau tshaj 130 ℃ nyob rau hauv lub voj voog ntawm cov kua dej kub kub thiab kev ua haujlwm tsis zoo nyob rau lub sijhawm, thaum lub sijhawm ntawm cov hlau slag (meshing txav ntawm cov khoom siv hlau thiab lub sijhawm ua haujlwm ntawm cov hlau shavings poob rau hauv nruab nrab ua haujlwm) hauv cov roj kub kub uas tau tsav los ntawm cov ntsaws ruaj ruaj tshwm sim los ntawm kev cuam tshuam ntawm cov sealing kev pab cuam lub neej.
Yog li, HNBR tuaj yeem siv rau hauv qhov kub thiab txias, tsis kub tsis kam, kub compression mus tas li deformation, oxidation thiab acid degradation ntawm cov roj thiab hlau sludge kev ua tau zoo thiab lwm yam ntawm tus nqi ntawm qhov zoo qhia, nrog rau nws hloov FKM foob tam sim no, ob qho tib si los txhim kho cov kev pab cuam lub neej ntawm cov ntsaws ruaj ruaj, tab sis kuj txo qhov zaus ntawm kev hloov ntawm qhov nruab nrab ua haujlwm; thiab kub tsis kam ntawm FKM yog qhov tsawg heev. Rau kev tsim kho tshuab ua haujlwm hydraulic system, lub kaw lus ua haujlwm siab feem ntau yog 16MPa (yog lub tshuab ua haujlwm siab), qhov nruab nrab ua haujlwm (HM46 lossis HM32 hydraulic roj) ntawm qhov kev ua haujlwm kub ntawm 45-55 ℃ , vim qhov kev ua haujlwm ntawm cov cuab yeej tsis zoo, ua ke nrog kev ua haujlwm tsis zoo ntawm tus neeg siv nrog rau kev nrhiav kev lag luam hydraulic ntawm kev siv roj ntau dhau los ua rau cov khoom siv hluav taws xob tsis zoo. deterioration ntawm hydraulic roj.
Tsis tas li ntawd, qhov muaj pes tsawg leeg ntawm hydraulic system Cheebtsam ntawm high-speed rotary txav (hydraulic twj tso kua mis) thiab nquag reciprocating zawv zawg (hydraulic lub tog raj kheej piston pas nrig thiab ntau txoj kev thim rov qab valve qia) kuj ua rau cov hlau slag thiab roj deterioration, cov ntsaws ruaj ruaj kuj tshwm sim los ntawm kev cuam tshuam ntawm kev sib txhuam, lub siab los ntawm lwm yam kev tsis ua hauj lwm los ntawm kev poob siab. Cov ntsaws ruaj ruaj muaj qhov cuam tshuam tsis zoo rau tam sim no NBR cov ntsaws ruaj ruaj, vim nws lub zog tensile thiab tsis kam rau degradation ntawm cov roj yam ntxwv Rau cov uas twb muaj lawm NBR cov ntsaws ruaj ruaj, vim nws lub zog tensile thiab tsis kam rau degradation ntawm cov roj thiab yooj yim heev rau poob, vim lub zog ntawm HNBR, zoo rov qab los, nyob rau hauv ib feem ntawm lub tam sim ntawd poob siab ntawm kev ua tau zoo ntawm cov ntsaws ruaj ruaj hydraulic valve muaj me ntsis kev cuam tshuam, li ntawd, nyob rau hauv hydraulic twj tso kua mis, thiab lwm yam. Cheebtsam ntawm kev siv HNBR cov ntsaws ruaj ruaj tuaj yeem txhim kho cov nyhuv sealing thiab kev pabcuam lub neej.
