Dab tsi yog atwj tso kua mis foob?
Cov ntsaws ruaj ruaj tiv thaiv cov kua dej tawm ntawm lub rotating lossis reciprocating ncej. Qhov no yog ib qho tseem ceeb rau txhua lub twj tso kua mis thiab nyob rau hauv cov ntaub ntawv ntawm centrifugal twj tso kua mis ob peb sealing kev xaiv yuav muaj: packings, di ncauj ntsaws ruaj ruaj, thiab tag nrho cov hom ntawm mechanical seals - ib zaug, ob npaug rau thiab tandem nrog rau cartridge seals. Rotary zoo hloov twj tso kua mis zoo li lub iav twj tso kua mis thiab cov twj tso kua mis vane yog muaj nyob rau hauv ntim, di ncauj thiab cov khoom siv foob. Reciprocating twj tso kua mis ua rau muaj teeb meem sib khi sib txawv thiab feem ntau cia siab rau ntawm daim di ncauj los yog ntim khoom. Qee cov qauv tsim, xws li cov twj sib nqus tsav, cov twj diaphragm lossis cov twj tso kua mis peristaltic, tsis tas yuav cov ntsaws ruaj ruaj. Cov twj no hu ua 'sealless' twj muaj xws li cov ntsaws ruaj ruaj ruaj ruaj kom tiv thaiv cov kua dej tawm.
Dab tsi yog hom twj tso kua mis ncej ntsaws ruaj ruaj?
Ntim
Packing (tseem hu ua shaft packing lossis gland packing) muaj cov khoom muag muag, uas feem ntau braided los yog tsim rau hauv cov nplhaib. Qhov no yog nias rau hauv lub chamber nyob ib ncig ntawm lub tsav ncej hu ua lub thawv ntim khoom los tsim lub foob (Daim duab 1). Feem ntau, compression yog siv axially rau cov ntim tab sis nws tseem tuaj yeem siv radially los ntawm hydraulic nruab nrab.
Kev lig kev cai, kev ntim khoom yog tsim los ntawm tawv, hlua lossis flax tab sis tam sim no feem ntau muaj cov khoom siv tsis zoo xws li nthuav dav PTFE, compressed graphite, thiab granulated elastomers. Kev ntim khoom yog kev lag luam thiab feem ntau siv rau cov kua tuab, nyuaj-rau-sau xws li cov resins, tar lossis adhesives. Txawm li cas los xij, nws yog ib qho kev sib khi tsis zoo rau cov kua dej nyias nyias, tshwj xeeb tshaj yog nyob rau hauv siab dua. Kev ntim khoom tsis tshua muaj kev puas tsuaj loj, thiab nws tuaj yeem hloov tau sai thaum lub sijhawm kaw.
Cov ntsaws ruaj ruaj yuav tsum tau lubrication kom tsis txhob muaj kev sib txhuam ntawm cov cua sov. Qhov no feem ntau yog muab los ntawm cov twj tso kua mis nws tus kheej uas nyhav me ntsis los ntawm cov khoom ntim. Qhov no tuaj yeem cuam tshuam thiab hauv cov ntaub ntawv ntawm corrosive, flammable, los yog kua tshuaj lom yog feem ntau txais tsis tau. Nyob rau hauv cov ntaub ntawv no muaj kev nyab xeeb, lubricant sab nraud yuav siv tau. Ntim yog tsis tsim nyog rau sealing twj siv rau cov kua uas muaj abrasive particulates. Cov khoom tuaj yeem nkag mus rau hauv cov khoom ntim khoom thiab qhov no yuav ua rau lub twj tso kua mis los yog lub thawv ntim khoom puas.
Daim di ncauj
Lip Seals, tseem hu ua radial ncej ntsaws ruaj ruaj, tsuas yog ncig elastomeric cov ntsiab lus uas tau tuav nyob rau hauv qhov chaw tiv thaiv tus ncej tsav los ntawm lub tsev nyob sab nraud (Daim duab 2). Lub foob tshwm sim los ntawm kev sib txhuam ntawm ' di ncauj ' thiab ncej thiab qhov no feem ntau yog txhawb los ntawm lub caij nplooj ntoos hlav. Di ncauj ntsaws ruaj ruaj yog muaj thoob plaws hauv kev lag luam hydraulic thiab tuaj yeem pom ntawm cov twj, hydraulic motors, thiab actuators. Lawv feem ntau muab cov khoom sib txuas, thaub qab foob rau lwm lub tshuab sealing xws li cov tshuab ntsaws ruaj ruaj Lip seals feem ntau txwv rau qhov tsis tshua muaj siab thiab kuj tsis zoo rau cov kua dej nyias nyias, uas tsis yog lubrication. Ntau lub di ncauj foob tshuab tau siv tau zoo tiv thaiv ntau yam kua nplaum, tsis yog abrasive. Daim di ncauj tsis haum rau kev siv nrog cov kua nplaum los yog cov kua dej uas muaj cov khib nyiab vim lawv raug hnav thiab qee qhov kev puas tsuaj me me tuaj yeem ua rau tsis ua haujlwm.
Mechanical seals
Mechanical seals tseem ceeb muaj xws li ib los yog ntau khub ntawm optically tiaj tus, zoo polished lub ntsej muag, ib tug nyob ruaj ruaj nyob rau hauv lub vaj tse thiab ib tug rotating, txuas nrog lub tsav ncej (Daim duab 3). Lub ntsej muag yuav tsum tau lubrication, los ntawm cov twj tso kua mis nws tus kheej los yog los ntawm ib tug barrier kua. Nyob rau hauv qhov tseeb, lub ntsej muag foob tsuas yog nyob rau hauv kev sib cuag thaum lub twj tso kua mis so. Thaum lub sij hawm siv, lub lubricating kua muab ib tug nyias, hydrodynamic zaj duab xis ntawm opposing lub ntsej muag, txo hnav thiab pab thaum tshav kub kub dissipation.
Mechanical seals tuaj yeem tswj tau ntau yam dej, viscosities, siab, thiab kub. Txawm li cas los xij, lub tshuab foob yuav tsum tsis txhob qhuav. Ib qho txiaj ntsig tseem ceeb ntawm cov tshuab foob tshuab yog tias lub tog raj kheej thiab lub tog raj kheej tsis yog ib feem ntawm lub sealing mechanism (raws li cov ntaub ntawv ntim thiab di ncauj seals) thiab tsis yog li ntawd yuav tsum hnav.
Muab ob npaug rau
Ob lub ntsaws ruaj ruaj siv ob lub tshuab ntsaws ruaj ruaj nyob rau sab nraub qaum (Daim duab 4). Qhov chaw sab hauv mus rau ob pawg ntawm lub ntsej muag foob tuaj yeem ua hydraulically pressurized nrog lub barrier kua kom cov yeeb yaj kiab ntawm lub foob ntsej muag tsim nyog rau lubrication yuav yog cov kua barrier thiab tsis yog qhov nruab nrab yog pumped. Lub barrier kua yuav tsum tau sib xws nrog cov twj nruab nrab. Ob chav ntsaws ruaj ruaj yog qhov nyuaj rau kev khiav lag luam vim qhov xav tau ntawm kev siv zog thiab feem ntau tsuas yog siv thaum nws tsim nyog los tiv thaiv cov neeg ua haujlwm, cov khoom siv sab nraud thiab ib puag ncig ib puag ncig los ntawm cov dej txaus ntshai, tshuaj lom lossis nplaim taws.
Tandem foob
Tandem cov ntsaws ruaj ruaj zoo ib yam li ob lub foob tab sis ob pawg ntawm cov ntsaws ruaj ruaj ntsej muag nyob rau hauv tib txoj kev tsis yog rov qab-rau-rov qab. Tsuas yog cov khoom-sab foob rotates nyob rau hauv lub twj tso kua mis tab sis seepage hla lub foob ntsej muag nws thiaj li kis tau tus barrier lubricant. Qhov no muaj qhov tshwm sim rau lub atmospheric sab foob thiab ib puag ncig ib puag ncig.
Cartridge seals
Lub cartridge foob yog ib pob khoom ua ntej sib dhos ntawm cov khoom siv foob. Cartridge kev tsim kho tshem tawm cov teeb meem kev teeb tsa xws li kev xav tau los ntsuas thiab teeb tsa lub caij nplooj ntoos hlav compression. Lub ntsej muag foob tseem tiv thaiv kev puas tsuaj thaum lub sijhawm teeb tsa. Hauv kev tsim, lub foob foob tuaj yeem yog ib qho, ob npaug lossis tandem teeb tsa uas muaj nyob rau hauv lub caj pas thiab ua rau lub tes tsho.
Gas barrier seals.
Cov no yog cartridge-style dual lub rooj zaum nrog lub ntsej muag tsim los ua kom lub zog siv cov roj inert ua ib qho thaiv, hloov cov kua roj lubricating. Lub ntsej muag foob yuav raug muab cais los yog tuav hauv kev sib cuag xoob thaum lub sijhawm ua haujlwm los ntawm kev kho cov roj siab. Ib qho me me ntawm cov pa roj tuaj yeem khiav mus rau hauv cov khoom thiab qhov chaw.
Cov ntsiab lus
Cov ntsaws ruaj ruaj tiv thaiv cov kua dej tawm ntawm lub twj tso kua mis tig los yog rov ua dua. Feem ntau yuav muaj ntau yam kev xaiv sealing: packings, di ncauj ntsaws ruaj ruaj, thiab ntau hom kev sib tsoo tshuab - ib leeg, ob npaug thiab tandem nrog rau cov ntsaws ruaj ruaj.
Post lub sij hawm: May-18-2023