Roj Hmab O-rings, raws li cov khoom siv sib khi feem ntau hauv kev lag luam, lawv qhov kev siv zoo cuam tshuam ncaj qha rau kev sib khi kev ntseeg siab, kev ua haujlwm zoo thiab kev pabcuam lub neej ntawm cov khoom siv. Los ntawm qhov kev xav ntawm daim ntawv thov engineering, kab lus no tau txheeb xyuas cov txheej txheem kev tshawb fawb, cov txheej txheem kev teeb tsa, cov ntsiab lus tseem ceeb ntawm kev saib xyuas tsis tu ncua thiab cov tswv yim tiv thaiv tsis ua haujlwm rau roj hmab O-rings. Ua ke nrog cov khoom siv thiab cov qauv kev ua haujlwm hloov kho, nws muab cov kws tshaj lij engineering thiab cov kws kho mob cuam tshuam nrog kev qhia txog kev kawm thiab kev siv tswv yim, pab txo qis kev pheej hmoo ntawm kev sib khi tsis ua haujlwm.
I. Kev xaiv kev tshawb fawb: Kev sib raug zoo raws li kev ua haujlwm thiab cov khoom siv
Lub hauv paus ntawm kev xaiv roj hmab O-rings yog ua kom tiav peb - qhov haum ntawm "cov ntaub ntawv kev ua tau zoo - cov kev xav tau ntawm kev ua haujlwm - cov yam ntxwv tsis zoo" kom tsis txhob muaj kev sib khi tsis ua haujlwm vim xaiv qhov sib txawv.
1. Cov kev ua haujlwm tsis zoo tswj hwm kev xaiv
Kev hloov pauv kub: Xaiv cov khoom raws li qhov kub thiab txias ntawm qhov chaw ua haujlwm. Rau qis- qhov kub thiab txias (-60℃rau -20 degree), silicone roj hmab (VMQ) lossis fluorosilicone roj hmab yog nyiam. Rau qhov kub thiab txias (150℃txog 260 degree), fluororubber (FKM) raug xaiv. Rau qhov kub thiab txias (-20℃txog 100 degree), nitrile roj hmab (NBR) lossis chloroprene roj hmab (CR) tuaj yeem siv.
Kev sib raug zoo nruab nrab: Thaum nyob rau hauv kev sib cuag nrog cov tsis yog -polar media xws li cov roj ntxhia thiab roj hydraulic, nitrile roj hmab (NBR) nyiam dua, vim nws qhov ntim qhov o tuaj yeem tswj tau li ntawm 10%. Thaum nyob rau hauv kev sib cuag nrog corrosive media xws li muaj zog acids, muaj zog alkalis thiab muaj zog oxidants, fluororubber (FKM) yuav tsum tau xaiv. Hauv kev lag luam khoom noj thiab kev kho mob, silicone roj hmab (VMQ) uas ua tau raws li USP Class VI tus qauv yuav tsum raug xaiv los xyuas kom meej biocompatibility.
Pressure adaptation: For low-pressure conditions (≤10MPa), conventional O-rings can be selected. For medium and high-pressure conditions (10MPa to 30MPa), retaining rings should be used in combination. For ultra-high-pressure conditions (>30MPa), cov qauv txhawb zog O-rings yuav tsum raug xaiv kom tsis txhob muaj kev puas tsuaj rau extrusion.
2. Kev xaiv tus qauv ntawm cov qauv tsis zoo
Hla -sectional txoj kab uas hla thiab compression piv: Tus ntoo khaub lig-sectional txoj kab uas hla ntawm O- nplhaib yuav tsum tau txiav txim raws li qhov loj ntawm lub sealing groove, thiab compression piv yuav tsum tau tswj nyob rau hauv ib tug tsim nyog thaj tsam ntawm 15% mus rau 30%. Lub compression piv uas tsawg dhau tuaj yeem yooj yim ua rau cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob
Dimensional kam rau ua: Xaiv O-rings uas ua raws li GB / T 3452.1 lossis ISO 3601 cov qauv, kom ntseeg tau tias lub puab txoj kab uas hla thiab tus ntoo khaub lig-sectional txoj kab uas hla tolerances nyob rau hauv qhov kev tso cai kom tsis txhob muaj kev cuam tshuam cov sealing nyhuv vim qhov sib txawv ntawm qhov sib txawv.
Ii. Standardized Installation: zam tib neeg kev puas tsuaj thiab sealing tsis xws luag
Tus txheej txheem ntawm kev teeb tsa kev teeb tsa ncaj qha txiav txim siab pib lub xeev sealing ntawm cov roj hmab O- nplhaib. Nws yog ib qho tsim nyog yuav tsum ua raws li plaub- cov txheej txheem ntawm "tu - haum - installation - kev tshuaj xyuas".
1. Kev npaj ua ntej kev teeb tsa
Kev kho kom huv: Ua tib zoo ntxuav lub sealing grooves, sealing nto thiab nto ntawm O-rings kom tshem tawm cov roj stains, hlau filings, plua plav thiab lwm yam impurities los tiv thaiv impurities los ntawm embedded rau hauv sealing nto thiab ua rau khawb.
Nto lubrication: Raws li qhov sib xws ntawm qhov nruab nrab, xaiv cov roj nplua nyeem uas tsim nyog (xws li silicon- roj raws, fluorine- raws roj), thiab sib npaug rau saum npoo ntawm O- lub nplhaib thiab sab hauv phab ntsa ntawm lub qhov sib khi kom txo qhov kev sib txhuam thaum lub sij hawm teeb tsa thiab tiv thaiv cov khoom siv roj hmab los ntawm kev sib tsoo ntau dhau.
Kev npaj cov cuab yeej: Siv cov cuab yeej tshwj xeeb rau kev teeb tsa (xws li cov khoom siv yas, lub tes tsho qhia), thiab zam kev sib cuag ncaj qha ntawm cov cuab yeej hlau ntse nrog O-rings los tiv thaiv khawb lossis punctures ntawm cov roj hmab nto.
2. Standardize installation kev khiav hauj lwm
Thaum txhim kho, tsis txhob ncab ntau dhau ntawm O-ntiv nplhaib (stretching npaum li cas tsawg dua lossis sib npaug li 5%) los tiv thaiv kev puas tsuaj rau cov qauv molecular ntawm cov khoom. Rau prefabricated seals, nws yog ib qho tsim nyog los xyuas kom meej tias O-rings yog tag nrho embedded rau hauv grooves yam tsis muaj distortion los yog offset.
Rau reciprocating motion sealing scenarios, nws yog ib qho tsim nyog los xyuas kom meej tias qhov haum clearance ntawm O-ring thiab cov khoom txav yog tsim nyog kom tsis txhob muaj kev txav ntau dhau vim qhov loj dhau los yog kev sib txhuam ntau dhau vim qhov kev tshem tawm me me.
3. Kev tshuaj xyuas tom qab kev teeb tsa
Saib xyuas seb O-ntiv nplhaib haum rau qhov zawj tag, tsis muaj wrinkles lossis puas. Tshawb xyuas cov nyhuv sealing los ntawm kev ntsuas huab cua nruj lossis kev ntsuas siab kom ntseeg tau tias tsis muaj qhov xau.
Iii. Kev Saib Xyuas tsis tu ncua: Ib qho kev ntsuas tseem ceeb rau Extend Service Life
Lub hauv paus ntawm kev tuav cov roj hmab O-rings yog nyob rau hauv kev saib xyuas tsis tu ncua thiab kev cuam tshuam raws sij hawm kom ncua sijhawm cov khoom qub thiab tiv thaiv qhov poob ntawm kev sib khi.
Kev saib xyuas tsis tu ncua thiab sau tseg - khaws cia
Tsim kom muaj ib daim ntawv teev kev saib xyuas thiab tsis tu ncua xyuas cov tsos mob ntawm O-rings, nrog rau seb puas muaj tej yam tshwm sim xws li tawg, tawv, o, los yog deformation. Rau cov cuab yeej tseem ceeb, kev ntsuas kev sib khi (xws li kev ntsuas kev tuav pov hwm thiab kev kuaj pom) yuav tsum tau ua txhua 3 mus rau 6 lub hlis.
Sau cov kev hloov pauv hauv kev ua haujlwm tsis zoo (xws li qhov kub thiab txias hloov pauv, hloov kho qhov nruab nrab, thiab qhov siab siab), ntsuas qhov cuam tshuam rau kev ua haujlwm ntawm O-rings, thiab kwv yees qhov yuav tsum tau ua ua ntej.
2. Cov phiaj xwm kev saib xyuas
Rau O-rings uas raug rau siab - kub thiab siab - cov kev mob siab, ua kom lub voj voog tu thiab hloov lawv txhua txhua 12 txog 24 lub hlis txhawm rau tiv thaiv kev foob tsis ua haujlwm los ntawm cov khoom laus.
Yog tias qhov chaw ua haujlwm muaj cov yam ntxwv ntawm kev laus xws li ozone thiab ultraviolet rays, kev tiv thaiv kev tiv thaiv yuav tsum tau ua rau cov khoom kaw (xws li txhim kho lub tes tsho tiv thaiv), lossis cov khoom siv uas muaj kev tiv thaiv zoo heev, xws li chloroprene roj hmab (CR) thiab fluororubber (FKM), yuav tsum xaiv.
Tsis txhob khaws O-rings nyob rau hauv lub xeev compressed ntev. Thaum khaws cia, muab lawv tso rau hauv qhov chaw txias thiab qhuav, kom deb ntawm qhov chaw sov, roj stains thiab corrosive tshuaj tiv thaiv kev laus ntxov ntxov.
Iv. Kev Tswj Failure: Cov Hom Kev Ua Tsis Taus Feem ntau thiab Kev daws teeb meem
Kev ua tsis tiav ntawm cov roj hmab O-rings feem ntau muaj feem xyuam rau cov khoom xws li kev laus ntawm cov khoom, kev hloov tsis raug rau kev ua haujlwm, thiab kev puas tsuaj. Lub hom phiaj tiv thaiv thiab tswj kev ntsuas yuav tsum tau ua.
Hom kev ua tsis tiav thiab ua rau
Compression set: Ntev -lub sij hawm kub kub los yog siab compression piv ua rau kev puas tsuaj ntawm tus ntoo khaub lig- txuas cov qauv ntawm cov roj hmab molecular chains thiab poob ntawm sealing kev nyuaj siab, uas feem ntau tshwm sim nyob rau hauv lub sij hawm ntev - siv nitrile roj hmab (NBR) nyob rau hauv siab - kub.
Tshuaj swelling thiab cracking: Incompatibility ntawm cov khoom thiab nruab nrab ua rau txawv txav volume expansion ntawm O- nplhaib thiab cov khoom brittleness thiab cracking. Qhov no feem ntau pom thaum cov roj hmab nitrile los rau hauv kev sib cuag nrog cov kuab tshuaj polar los yog fluororubber los rau hauv kev sib cuag nrog cov muaj zog oxidants.
Mechanical puas: khawb thaum lub sij hawm installation, stretching ntau dhau, los yog extrusion puas thiab kev sib txhuam hnav nyob rau hauv kev ua hauj lwm tej yam kev mob, manifested li tawg, notches los yog tsis sib xws thickness ntawm lub O- nplhaib.
Thermal aging thiab ozone aging: Siab - qhov kub thiab txias ib puag ncig ua rau oxidation thiab degradation ntawm roj hmab molecules, manifested li hardening thiab cracking. Nyob rau hauv ib puag ncig ozone, tsis yog -ozone- cov ntaub ntawv tiv taus yog cov kab nrib pleb, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej zoo sib xws.
2. Lub hom phiaj tiv thaiv thiab tswj thiab kev daws teeb meem
Rau kev ruaj khov compression deformation: Ua kom zoo dua qhov compression piv tsim kom tsis txhob dhau - ntau compression; Xaiv cov ntaub ntawv uas muaj kev tiv thaiv kev laus zoo, xws li hloov lawv nrog fluororubber (FKM) nyob rau hauv siab - qhov kub thiab txias ua haujlwm.
Rau cov tshuaj o thiab tawg: Re- soj ntsuam qhov sib xws ntawm qhov nruab nrab thiab cov khoom siv, thiab hloov cov khoom tsim nyog, xws li hloov cov roj hmab nitrile (NBR) nrog fluororubber (FKM) kom hloov mus rau corrosive media.
Rau kev puas tsuaj rau txhua yam: Standardize installation thiab ua haujlwm, thiab siv cov cuab yeej tshwj xeeb; Nruab cov nplhaib tuav rau nruab nrab thiab siab -siab ua haujlwm. Optimize qhov roughness ntawm sealing nto thiab txo cov coefficient ntawm kev sib txhuam.
Rau kev laus tsis ua hauj lwm: Tswj qhov chaw ua hauj lwm kub kom tsis txhob muaj ntau tshaj cov khoom siv kam rau ua; Rau cov xwm txheej uas yooj yim rau ozone, chloroprene roj hmab (CR) lossis cov khoom siv roj hmab nrog ntxiv ozone{0}} cov tshuaj tiv thaiv yuav tsum raug xaiv.
