Nyob rau hauv hydrogenation units, Orbit pob li qub nyob rau ntawm qhov hluav taws xob ntawm reciprocating compressors ua hauj lwm raws li ib tug tseem ceeb cais cov cuab yeej. Kev ua tsis tiav hauv cov li qub no feem ntau ua rau lub sijhawm ncua sij hawm rau cov khoom siv txawv teb chaws thiab cov nqi qis, ncaj qha cuam tshuam rau lub sijhawm ntev - kev ruaj ntseg ntawm chav tsev. Rau cov kev ua tsis tau zoo xws li "jamming" thiab "fracture" nyob rau hauv cov khoom siv no, kev kho vaj tse hauv tsev ua ke nrog cov khoom siv kho dua tshiab muaj kev daws teeb meem zoo. Cov kev txheeb xyuas hauv qab no qhia txog qhov xwm txheej tsis ua haujlwm, qhia txog cov hauv paus hauv paus thiab cov tswv yim kho kho.
Fault Background thiab Phenomenon
Lub ntsiab lus ntawm qhov kev tshuaj ntsuam no yog Orbit pob valve ntsia ntawm qhov hluav taws xob ntawm lub tshuab hluav taws xob reciprocating hauv chav tsev hydrogenation. Qhov tsis ua haujlwm tau tshwm sim thaum lub sijhawm pib thauj khoom. Lub valve kev nyab xeeb ntawm qhov thib ob - qhov hluav taws xob theem dheev nqa, yuav tsum tau kaw qhov xwm txheej ceev. Kev tshuaj xyuas txog keeb kwm kev kub ntxhov tau lees paub qhov txawv txav ntawm qhov hluav taws xob theem ob. Corroborated los ntawm anomalous qhia ntawm lub valve qia txoj hauj lwm ua ntej qhov teeb meem, nws tau txiav txim siab ua ntej tias lub valve tsis qhib, ua rau lub cev overpressure.
Thaum disassembly thiab tshuaj xyuas, kev puas tsuaj tseem ceeb tau pom:
Lub qia nrog lub cam khiav tau nthuav tawm cov kab nrib pleb, ntug crushing, thiab cov qhab nia hnyav.
Qhov chaw sib cuag ntawm tus taw qhia tus pin thiab qia khiav pom qhov txawv deformation.
Sab hauv ntawm cov lus qhia bushing tso tawm loj indentation thiab galling.
Qhov tseem ceeb tshaj plaws, lub qia tus pin tau txiav tawm.
Spectral tsom xam thiab hardness kuaj tau lees paub tias cov khoom ntawm cov khoom puas tau ntsib tus thawj SS410 specifications, zoo txiav txim siab raw khoom tsis xws luag.
Keeb Kwm Analysis
Lub Orbit pob valve ua haujlwm ntawmib qho "lift-thiab-tig", qhov kev sib cuam tshuam ntawm tus taw qhia tus pin ntawm lub kaus mom thiab lub cam khiav ntawm lub qia tig lub pob. Raws li kev tshawb pom thiab kev ua haujlwm ntawm kev sib tsoo, qhov tsis ua haujlwm tau raug ntaus nqi rau peb yam tseem ceeb: cov teeb meem kev sib dhos, nruab nrab corrosion, thiab hydrogen embrittlement.
Mechanical Assembly thiab Hnav
Kev tshuaj xyuas ntawm cov cim deformation ntawm lub cam khiav tau pom tias cov lus qhia tus pin tsis swb zoo nyob rau hauv lub helical zawj, tshwj xeeb yog jamming ntawm cov kev hloov pauv. Qhov kev sib tsoo no txwv lub pob kev sib hloov, ua rau taug qab hnav thiab deformation hauv kev caij tsheb kauj vab nquag. Tsis tas li ntawd, cov khoom tawg ntawm qhov tuav tus pin tau nyob nruab nrab ntawm lub cam qia thiab lub bushing, ua rau kom lub zog ua haujlwm tau zoo. Nyob rau hauv lub superposition ntawm cov neeg kho tshuab kev nyuaj siab, lub qia fractured ntawm lub point ntawm siab tshaj plaws kev nyuaj siab concentration.
Chloride Ion Corrosion
Lub valve ua haujlwm ntawm 13.0 MPa nrog qhov nruab nrab uas muaj hydrocarbons thiab kab chlorides. Kev soj ntsuam ntawm cov sludge impurities los ntawm lub qhov hluav taws xob compressor qhia pom cov ntsiab lus chloride ion siab txog 3.10%. Txawm hais tias SS410 martensitic stainless hlau muaj qee qhov tsis kam rau cov tshuaj chlorides, cov concentrations siab tuaj yeem cuam tshuam cov zaj duab xis passivation, txhawb pitting thiab crevice corrosion. Ntev - raug cuam tshuam rau lub sij hawm txo qhov ua tau zoo ntawm cov ntoo khaub lig- ntu thiab kev ncaj ncees ntawm cov khoom.
Hydrogen Embrittlement thiab Pin Fracture
Nyob rau hauv ib puag ncig nrog siab hydrogen ib nrab siab, hydrogen atoms diffuse mus rau hauv cov hlau matrix, ua rau hydrogen embrittlement yam ntxwv los ntawm txo ductility thiab toughness. Thaum lub qia tus pin cov ntaub ntawv nthuav tawm zoo kev ntxhov siab corrosion tsis kam, kev sib xyaw ntawm hydrogen embrittlement thiab cov torque ntau dhau los ntawm kev sib tsoo tshuab ua rau tus pin raug cuam tshuam rau nkig tawg thaum phau ntawv khiav hauj lwm torque tshaj qhov tseem ceeb txwv.
Kev kho dua tshiab thiab cov khoom siv kho dua tshiab
Hais txog cov hauv paus hauv paus, lub tswv yim kho dua tshiab tau tsom mus rau "kev kho kom zoo, kev txhim kho hauv cheeb tsam, thiab kev ua kom zoo dua qub," nrog rau qhov tshwj xeeb ntawm kev hloov kho cov khoom siv rau cov khoom tsis zoo.
Laser Cladding rau cov khoom tseem ceeb
Txhawm rau txhim kho hnav tsis kam thiab tiv thaiv deformation, laser cladding tshuab tau ua haujlwm:
Qe nrog Cam Track: Qhov chaw taug kev helical tau clad nrog Stellite 12 alloy ntawm SS410 puag. Stellite 12 muaj kev ua haujlwm siab thiab kev hnav zoo dua, tiv thaiv kev khiav deformation.
Qhia Pin: Tus pin tau clad nrog Stellite 6 alloy ntawm SS410 puag. Stellite 6 muab qhov zoo dua toughness thiab thermal shock resistance, ua rau nws zoo tagnrho rau kev sib txhuam khub.
Tib lub sijhawm, cov lus qhia bushing thiab tuav tus pin tau rov ua dua -machined los xyuas kom meej haum haum.
Kev hloov kho hauv tsev ntawm Sealing System
Tus thawj lub kaus mom gasket yog ib qho kev cai-ua, ultra-thin imported Cheebtsam nrog lub sij hawm ntev. Tom qab txheeb xyuas cov npoo ntawm lub zog, lub kaus mom sealing nto tau raug tshuab los tsim cov qauv zawj rau graphite kauv- qhov txhab gasket. Qhov kev hloov kho no tau daws qhov teeb meem sealing thiab ua tiav cov khoom seem ntawm tus kheej -sufficiency. Tsis tas li ntawd, cov khoom ntim tau hloov kho dua tshiab rau hauv cov khoom siv graphite hloov tau yooj yim, sib npaug rau cov qauv GP-6 txawv teb chaws.
Cov txiaj ntsig kev ua haujlwm thiab cov lus xaus
Tom qab kev kho dua tshiab, lub valve dhau qhov kev sim hydrostatic thiab pneumatic thiab tau muab rov qab. Cov ntaub ntawv teb qhia tau hais tias qhov hloov kho Orbit pob valve ua haujlwm zoo nrog kev sib khi zoo heev. Txog rau tam sim no, lub valve tau ua haujlwm ruaj khov rau peb xyoos yam tsis muaj kev rov ua haujlwm dua.
Cov ntaub ntawv no qhia tau hais tias rau cov khoom xa tuaj Orbit pob li qub ua haujlwm nyob rau hauv cov xwm txheej hnyav zoo sib xws, kev kho dua tshiab hauv tsev siv cov thev naus laus zis thev naus laus zis, xws li laser cladding uas tuaj yeem tsis tsuas yog txo cov khoom seem ntawm kev sib tw tab sis kuj tseem ua rau muaj kev pab cuam lub neej hauv hydrogen - nplua nuj, chloride- muaj ib puag ncig. Qhov kev daws teeb meem no muaj txiaj ntsig zoo rau kev kho lub valve hauv cov chav petrochemical zoo sib xws.
