Taw qhia rau Mechanical Seals
Mechanical seals yog ib qho tseem ceeb ntawm cov tshuab nrog precision thiab complex qauv, thiab yog cov khoom tseem ceeb ntawm ntau lub twj tso kua mis, cov tshuaj tiv thaiv synthesis kettles, turbo compressors, submersible motors thiab lwm yam khoom siv. Nws sealing kev ua tau zoo thiab kev pab cuam lub neej nyob ntawm ntau yam, xws li hom xaiv, tshuab precision, raug installation thiab siv, thiab lwm yam.
Kev paub yooj yim ntawm mechanical seals
1. Lub ntsiab lus tseem ceeb ntawm cov tshuab foob:
Mechanical foob yog hais txog cov cuab yeej uas tiv thaiv cov kua dej los ntawm yam tsawg kawg ib khub ntawm qhov kawg ntawm lub ntsej muag perpendicular mus rau lub axis ntawm kev sib hloov, nyob rau hauv qhov kev txiav txim ntawm cov kua siab thiab lub elastic quab yuam (los yog sib nqus quab yuam) ntawm cov nyiaj them nyiaj mechanism, thiab kev koom tes ntawm pab. seals kom haum thiab swb txheeb ze rau ib leeg. Lub auxiliary foob ntawm lub nplhaib them nyiaj yog ib lub tshuab hlau hu ua lub tshuab foob foob.
2. Muaj pes tsawg leeg ntawm mechanical seal:
Feem ntau muaj plaub yam nram qab no. a. Cov ntsaws ruaj ruaj tseem ceeb: txav nplhaib thiab lub nplhaib zoo li qub. b. Cov khoom siv foob: sealing nplhaib. c. Compression qhov chaw: caij nplooj ntoos hlav, laub nplhaib. d. Cov khoom siv kis tau tus mob: lub caij nplooj ntoos hlav hla lub rooj zaum thiab qhov tseem ceeb lossis kho cov ntsia hlau
yuav tsum xyuam xim rau qhov teeb meem
1. Cov teeb meem xav tau kev saib xyuas thaum lub sijhawm teeb tsa
a. Ua tib zoo saib xyuas kom tsis txhob muaj kev sib txawv ntawm kev teeb tsa thaum lub sijhawm teeb tsa
(1) Lub caj pas yuav tsum tau nruj tom qab lub coupling yog ua raws. Cov bolts yuav tsum sib npaug sib npaug los tiv thaiv lub ntsej muag kawg ntawm lub caj pas los ntawm deflecting. Kos txhua qhov taw tes nrog lub ntsuas ntsuas, thiab qhov yuam kev yuav tsum tsis pub tshaj 0.05 hli.
(2) Tshawb xyuas qhov kev sib haum xeeb (piv txwv li concentricity) ntawm lub caj pas thiab sab nraud ntawm lub ncej lossis bushing, thiab xyuas kom meej tias nws nyob ib puag ncig. Siv lub ntsuas ntsuas ntsuas ntsuas qhov ntsuas qhov siab ntawm txhua qhov taw qhia tsis ntau dua 0.01mm.
b. Tus nqi ntawm lub caij nplooj ntoos hlav compression yuav tsum tau ua raws li cov cai. Nws tsis raug tso cai kom loj lossis me dhau, thiab qhov yuam kev yuav tsum yog 2.00 hli. Yog tias nws loj dhau, qhov tshwj xeeb siab ntawm lub ntsej muag kawg yuav nce ntxiv, thiab lub ntsej muag kawg yuav hnav ntawm tus nqi nrawm dua. Qhov me me dhau yuav ua rau tsis txaus siab thiab tsis tuaj yeem ua lub luag haujlwm sealing.
c. Tom qab lub nplhaib txav tau teeb tsa, xyuas kom meej tias nws tuaj yeem txav tau yooj yim ntawm tus ncej, thiab nws yuav tsum rov pib dua tom qab nias lub nplhaib txav tawm tsam lub caij nplooj ntoos hlav.
2. Kev ceev faj thaum disassembled
a. Ceev faj thaum disassemble lub tshuab foob. Nws yog nruj me ntsis txwv tsis pub siv tes rauj thiab shovels tiaj tus, thiaj li tsis ua kom puas lub sealing Cheebtsam. Ib khub ntawm cov hlau hlau hooks tuaj yeem siv los txuas ntxiv mus rau qhov sib txawv ntawm lub rooj tsav tsheb hauv qhov kev taw qhia tus kheej nyiaj txiag kom rub tawm cov khoom sib khi. Yog tias qhov ntsuas tsis tuaj yeem disassembled, nws yuav tsum tau ntxuav ua ntej disassembly.
b. Yog tias cov khoom siv foob siv rau ntawm ob qho kawg ntawm lub twj tso kua mis, lawv yuav tsum tau saib xyuas ib leeg thaum sib dhos thiab disassembly los tiv thaiv ib qho los ntawm kev poob.
c. Rau cov neeg kho tshuab foob uas tau ua haujlwm, yog tias lub caj pas xoob thiab lub foob txav mus, lub nplhaib dynamic thiab zoo li qub yuav tsum tau hloov, thiab nws yuav tsum tsis txhob rov nruj dua kom siv txuas ntxiv. Vim tias tom qab lub zog zoo li no, tus thawj khiav khiav ntawm kev sib txhuam khub yuav hloov, thiab kev sib khi ntawm qhov chaw sib cuag yuav yooj yim puas.
Kev ua haujlwm kom raug thiab kev saib xyuas ntawm Mechanical Seals
1. Kev npaj ua hauj lwm thiab cov teeb meem xav tau kev saib xyuas ua ntej pib
a. Ua tib zoo tshuaj xyuas lub tshuab foob, thiab seb lub installation ntawm cov cuab yeej pabcuam thiab cov kav dej puas ua tiav thiab seb nws puas ua tau raws li cov kev cai.
b. Ua ib qho kev ntsuas siab zoo li qub ua ntej pib lub tshuab foob txhawm rau xyuas seb puas muaj qhov xau ntawm cov tshuab foob. Yog tias muaj cov dej ntws tawm ntau, nrhiav qhov laj thawj thiab sim tshem tawm nws. Yog tias nws tseem siv tsis tau, nws yuav tsum tau disassembled rau kev tshuaj xyuas thiab rov nruab dua. Feem ntau, qhov ntsuas qhov siab zoo li qub yog 2 ~ 3 kg / cm2.
c. Nias lub twj tso kua mis lub log los xyuas seb nws puas yog brisk thiab txawm. Yog hais tias lub cranking yog ib qho nyuaj los yog tsis txav, koj yuav tsum xyuas seb lub rooj sib txoos loj yog tsis ncaj ncees lawm thiab seb lub installation puas tsim nyog.
2. Kev teeb tsa thiab kaw
a. Ua ntej pib, khaws lub kaw lus kaw nrog cov kua. Thaum thauj khoom nruab nrab, chav yuav tsum tau siv los ua kom sov lub kaw kab noj hniav kom yaj qhov nruab nrab. Lub tsheb yuav tsum tau cranked ua ntej pib los tiv thaiv lub nplhaib mos ntawm kev tawg vim yog pib tam sim ntawd.
b. Rau cov neeg kho tshuab cov ntsaws ruaj ruaj uas siv cov roj sealing sab nraud ntawm lub twj tso kua mis, cov roj sealing system yuav tsum tau qhib ua ntej. Nres cov roj sealing system kawg tom qab nres tsheb.
c. Tom qab lub twj tso kua mis roj kub tsis ua haujlwm, cov dej txias hauv cov roj foob kab noj thiab qhov kawg lub ntsej muag foob tsis tuaj yeem nres tam sim ntawd. Cov dej txias yuav tsum tau nres tsuas yog thaum cov roj kub ntawm qhov kawg ntawm lub ntsej muag lub ntsej muag poob qis dua 80 degrees, thiaj li tsis ua kom puas lub sealing qhov chaw.
3. Kev ua haujlwm
a. Yog tias muaj qhov xau me ntsis tom qab lub twj tso kua mis pib, nws yuav tsum tau saib xyuas rau lub sijhawm. Yog tias qhov xau tsis txo qis tom qab 4 teev ntawm kev ua haujlwm tas mus li, lub twj tso kua mis yuav tsum tau nres rau kev tshuaj xyuas.
b. Kev ua haujlwm siab ntawm lub twj tso kua mis yuav tsum ruaj khov, thiab lub siab hloov pauv yuav tsum tsis pub tshaj 1 kg / cm2.
c. Thaum lub twj tso kua mis ua haujlwm, tsis txhob tso tawm kom tsis txhob muaj kev sib txhuam qhuav ntawm lub sealing nto thiab kev puas tsuaj rau lub foob.
d. Lub sealing mob yuav tsum tau xyuas ntau zaus. Thaum lub sijhawm ua haujlwm, thaum cov dej ntws tawm ntau tshaj tus qauv, cov roj hnyav tsis ntau tshaj 5 tee / min, thiab cov roj teeb tsis ntau tshaj 10 / min. Yog tias tsis muaj kev txhim kho nyob rau hauv 2-3 hnub, nres lub twj tso kua mis thiab xyuas cov khoom sib khi.
"Sealing" muaj keeb kwm ntev ntawm kev loj hlob hauv peb lub teb chaws. Cov ancients siv paj rwb, hemp thiab lwm yam fibers los ua cov ntsaws ruaj ruaj rau cov dej-lifting machinery, thaum txawv teb chaws lub teb chaws tsis siv packing mus txog rau thaum 1782. Qhov tseem ceeb ntawm sealing tsis tau hais txog ntawm no. Muaj kev qhuab qhia hu ua "Sealing Science" uas kawm txog kev cai lij choj ntawm kev sib khi, kev sib khi cov cuab yeej tsim tshuab thiab siv cov qauv kev tshawb fawb. Cov tsev kawm tshawb fawb tseem muaj cov kev kawm txuj ci tshwj xeeb rau kev kawm txog kev sib khi science. Nyob rau hauv peb lub teb chaws, txog tam sim no, raws li kuv paub, muaj cov kua dej Mechanics thiab hydraulic kis tau tus mob thiab lwm yam kev kawm, tab sis tsis muaj "seal system" tshwj xeeb nyob rau hauv sealing, yog li peb cov kev tshawb fawb theem tseem nyob deb dua piv rau txawv teb chaws.
Muaj ntau yam kev lag luam rau kev foob tsim, ntxiv rau cov khoom siv thiab cov tshuab, kuj tseem muaj cov tshuab tshuab (xws li cov tshuab ua kua, ciam txheej txoj kev xav, thiab lwm yam), tribology, tsis siv neeg tswj, thiab lwm yam. Yog li ntawd, rau kev sib khi, qhov nyuaj ntawm kev tshawb fawb yog. kuj loj. Qib ntawm kev lag luam sealing hauv tsev, kuv tus kheej xav tias piv nrog cov teb chaws txawv teb chaws, qhov sib txawv yuav tsum tsis pub tsawg tshaj 50 xyoo.
Hais txog txoj cai sealing
Yog tias koj xav kawm sealing, koj yuav tsum xub nkag siab txog kev xau. Thaum koj nkag siab txog lub hauv paus ntsiab lus ntawm kev xau, koj yuav muaj cov txheej txheem sealing zoo sib xws. Muaj peb hom kev xau ---
Ib qho yog leakage, uas yog, qhov sib txawv ntawm qhov khoob ntawm qhov chaw sealing
Qhov thib ob yog kev xau, uas yog, cov kua dej ntws tawm los ntawm lub capillary ntawm cov khoom sib khi
Qhov thib peb yog diffusion, uas yog hais txog kev hloov khoom siv uas tshwm sim thaum lub sealing nruab nrab dhau los ntawm qhov sib txawv los yog capillary ntawm cov khoom nyob rau hauv qhov kev txiav txim ntawm qhov sib txawv concentration.
Hais txog txoj kev sib khi
Muaj kwv yees li ob peb txoj kev sib khi ---
1. Txo tus naj npawb ntawm cov khoom kaw
2. Kev thaiv thiab kev sib cais
3. Extract los yog txhaj tshuaj
4. Ua kom cov dej tsis haum
5. Ntxiv cov khoom nquag hauv cov channel
6. Kev sib xyaw ntawm ntau txoj kev sib khi
Common Sealing Forms
Gasket seals, packing seals, mechanical seals, non-contact seals, and injection pressure plugging yog cov ntaub ntawv sealing ntau. Ntawm lawv, packing foob yuav tsum tau suav hais tias yog feem ntau, thiab nws kuj muaj xws li mos packing foob, nyuaj packing foob thiab tsim packing foob. Tsim cov ntim ntim khoom suav nrog peb cov O-rings, Y-rings, roj foob thiab lwm yam. Cov ntsaws ruaj ruaj tsis sib cuag muaj xws li cov ntsaws ruaj ruaj, labyrinth seals, floating seals, dynamic seals, magnetic fluid seals thiab hermetic seals.
Cov khoom ntawm cov khoom siv sib xyaw---thiab cov ntaub ntawv tshiab thiab thev naus laus zis
1) Feem ntau siv gasket kev ua tau zoo
Thaum siv lub valve, thawj gasket feem ntau hloov raws li qhov xwm txheej tshwj xeeb. Cov gaskets feem ntau yog: roj hmab ca gasket, roj hmab O-ring, yas ca gasket, PTFE hnab gasket, asbestos roj hmab gasket, hlau ca gasket, hlau tshwj xeeb zoo li tus gasket, hlau foreskin gasket, yoj gasket, lub qhov txhab gasket, thiab lwm yam.
(1) Rubber flat washer: yooj yim rau deform, yooj yim rau compress, tab sis tsis zoo nyob rau hauv lub siab thiab kub tsis kam, tsuas yog siv nyob rau hauv qhov chaw uas tsis muaj siab thiab tsis kub. Cov roj hmab ntuj muaj qee cov kua qaub thiab alkali tsis kam, thiab kev ua haujlwm kub yuav tsum tsis pub tshaj 60 degree; neoprene roj hmab kuj tuaj yeem tiv taus qee cov kua qaub thiab alkalis, thiab kev ua haujlwm kub yog 80 degree; nitrile roj hmab yog roj-resistant thiab siv tau mus txog 80 degree; Qhov kev ua haujlwm kub kuj tseem muaj zog dua li cov roj hmab zoo tib yam, thiab nws tuaj yeem siv hauv 150 degree nruab nrab.
(2) Roj Hmab O-puab lub tshuab ntxhua khaub ncaws: cov duab seem yog lub voj voog zoo meej, thiab nws muaj qee qhov kev nruj ntawm tus kheej. Cov nyhuv sealing zoo dua li ntawm lub tshuab ntxhua khaub ncaws, thiab lub zog nias me me.
(3) Yas ca gasket: Qhov loj tshaj plaws ntawm cov yas yog nws cov corrosion kuj zoo, thiab cov yas feem ntau muaj qhov kub tsis zoo. PTFE yog cov yas yas. Nws tsis tsuas yog muaj kev tiv thaiv corrosion zoo heev, tab sis kuj muaj qhov kub thiab txias ntau yam. Nws tuaj yeem siv tau ntev li ntawm -180 degree - ntxiv rau 200 degree .
(4) PTFE-wrapped gasket: Txhawm rau muab kev ua si tag nrho rau qhov zoo ntawm PTFE thiab ua rau nws cov elasticity tsis zoo, nws yog tsim rau hauv lub gasket qhwv nrog PTFE roj hmab lossis asbestos roj hmab. Nyob rau hauv txoj kev no, nws tsis tsuas yog muaj tib lub corrosion kuj zoo li lub PTFE lub tshuab ntxhua khaub ncaws, tab sis kuj muaj elasticity zoo, uas txhim kho cov nyhuv sealing thiab txo lub zog nias. Nws cov duab hla ntu yog qhia hauv daim duab 4-20.
(5) Asbestos roj hmab gasket: txiav los ntawm asbestos roj hmab ntawv. Nws cov khoom xyaw yog 60-80 feem pua asbestos thiab 10-20 feem pua roj hmab, nrog rau cov fillers thiab vulcanizing agents. Nws muaj cov cua kub zoo, ua haujlwm txias, thiab tshuaj lom neeg ruaj khov, thiab nws muaj ntau yam khoom thiab pheej yig tus nqi. Thaum siv, lub zog nias tsis tas yuav tsum loj heev. Vim tias nws tuaj yeem ua raws li cov hlau, nws yog qhov zoo tshaj rau lub tsho tiv no nrog ib txheej ntawm graphite hmoov kom tsis txhob mob hnyav.
Muaj plaub xim ntawm cov ntaub ntawv roj hmab asbestos: grey, siv rau qhov tsis tshua muaj siab (hom XB-200, siab tsis kam tsawg dua lossis sib npaug li 16 kg / cm2, kub tsis kam 200 degree); liab, siv rau nruab nrab siab (hom XB-350, siab tsis kam mus txog 40kg / cm2, kub tsis kam 350 degree); ntshav, siv rau kev kub siab (qib XB-450, siab tsis kam 100kg / cm2 kub tsis kam 450 degree); ntsuab, siv rau roj, siab kuj kuj zoo heev.
(6) Hlau ca cua sov nplhaib: txhuas, kub tsis kam 100 degree; aluminium 430 degree; tooj liab 315 degree; qis carbon steel 550 degree; nyiaj 650 degree; npib tsib xee 810 degree; Monel (nickel-tooj liab) alloy 810 degree, stainless hlau 870 degree. Ntawm lawv, txhuas muaj qhov tsis zoo siab, txhuas tuaj yeem tiv taus 64 kg / cm2, thiab lwm yam ntaub ntawv tuaj yeem tiv taus siab.
(7) Hlau anisotropic ntxhua khaub ncaws:
Lens gasket: Nws muaj nws tus kheej-tightening nyhuv thiab yog siv rau high-pressure li qub.
Oval ntxhua khaub ncaws: kuj yog rau cov tshuab ntxhua khaub ncaws uas muaj kev kub siab.
Ob chav tapered gasket: siv rau high-pressure internal self-tightening foob.
Tsis tas li ntawd, muaj cov square, rhombus, daim duab peb sab, cov hniav zoo li, dovetail puab, B puab, C puab, thiab lwm yam, uas feem ntau tsuas yog siv nyob rau hauv siab thiab nruab nrab siab li qub.
(8) Hlau sheathed gasket: Hlau muaj qhov kub thiab txias tsis kam thiab zoo elasticity. Cov ntaub ntawv foreskin muaj xws li txhuas, tooj liab, qis carbon steel, stainless hlau, Monel alloy, thiab lwm yam. Cov ntaub ntawv sau sab hauv muaj xws li asbestos, polytetrafluoroethylene, iav fiber, thiab lwm yam.
(9) Wave washer: Nws muaj cov yam ntxwv ntawm lub zog nias me me thiab zoo sealing nyhuv. Nws yog feem ntau siv nyob rau hauv daim ntawv ntawm ib tug ua ke ntawm hlau thiab non-hlau.
(10) Qhov txhab gasket: Nws yog ib txoj hlua hlau nyias thiab cov hlua uas tsis yog xim hlau uas tau muab khi ua ke thiab ua rau lub voj voog ntau txheej. Cov seem yog wavy thiab muaj zoo elasticity thiab sealing. Cov hlua hlau tuaj yeem ua los ntawm 08 steel, 0Cr13, 1Cr13, 2Cr13, 1Cr18Ni9Ti, tooj liab, aluminium, titanium, Monel alloy, thiab lwm yam. Cov ntaub ntawv tsis yog hlau muaj xws li asbestos, polytetrafluoroethylene, thiab lwm yam.
Saum toj no, thaum piav qhia txog kev ua haujlwm ntawm sealing gaskets, qee cov duab tau teev tseg. Nws yuav tsum raug sau tseg tias cov lej no muaj feem cuam tshuam nrog rau daim ntawv flange, nruab nrab tej yam kev mob, thiab kev teeb tsa thiab kho cov txheej txheem. Qee lub sij hawm lawv tuaj yeem tshaj, thiab qee zaum lawv tsis tuaj yeem ncav cuag. Tsis tas li ntawd, lub siab thiab qhov kub thiab txias kuj muaj kev sib hloov. Piv txwv li, qhov kub thiab txias, qhov siab dua qhov tsis kam. Lub peev xwm siab feem ntau txo qis, thiab cov teeb meem me me no tsuas yog pom tau hauv kev xyaum.
2) Cov ntaub ntawv tshiab thiab thev naus laus zis
Lub sealing gaskets qhia saum toj no tsis muaj kev qhia, thiab cov tshuab sealing tau tsim sai heev. Cov piv txwv hauv qab no qhia ob peb yam khoom tshiab thiab cov thev naus laus zis tshiab.
(1) Kev sib khi ua kua: Nrog kev txhim kho sai ntawm kev lag luam polymer organic synthesis, kua sealants tau tshwm sim rau kev sib khi zoo li qub; cov tshuab tshiab no feem ntau hu ua kua sealing. Lub hauv paus ntsiab lus ntawm cov kua sealing yog siv cov adhesion, fluidity thiab monomolecular zaj duab xis nyhuv ntawm cov kua sealant (lub thinner zaj duab xis, qhov ntau dua lub ntuj rov qab nyiam), thiab ua rau nws ua hauj lwm zoo li lub gasket nyob rau hauv lub siab tsim nyog. Yog li ntawd, lub sealant siv kuj hu ua kua gasket.
(2) PTFE raw khoom foob: PTFE kuj yog ib tug high-molecular organic compound. Ua ntej nws yog sintered rau hauv ib yam khoom, nws yog hu ua raw khoom. Nws yog mos hauv kev ntxhib los mos thiab muaj cov nyhuv zaj duab xis monomolecular. Daim kab xev ua los ntawm cov khoom siv raw yog hu ua raw khoom daim kab xev, uas tuaj yeem dov mus rau hauv ib lub disk rau lub sijhawm ntev. Nws tuaj yeem tsim kev ywj pheej thaum siv, thiab ib qho kev sib koom ua ke, tsuav yog muaj lub siab, yuav tsim lub nplhaib-zoo li daim nyias nyias uas sib npaug ua lub foob. Raws li lub gasket ntawm lub valve lub cev thiab lub valve cover nyob rau hauv lub valve, nws muaj peev xwm yuav pried qhib qhov sib txawv thiab ntim rau hauv cov khoom siv raw yam tsis tau tshem tawm lub disc los yog lub rooj vag. Lub zog nias yog me me, tsis nplaum rau tes, tsis nplaum rau ntawm flange nto, thiab nws yooj yim heev los hloov. Zoo tshaj plaws rau tus nplaig thiab zawj flanges. PTFE raw cov ntaub ntawv tseem tuaj yeem ua rau hauv cov raj thiab cov pas nrig rau kev sib khi.
(3) Hlau hollow O-ring: zoo elasticity, me me nias quab yuam, thiab nws tus kheej-tightening nyhuv. Ntau yam khoom siv hlau tuaj yeem siv tau, yog li nws tuaj yeem hloov mus rau qhov kub thiab txias, kub thiab muaj zog corrosive nruab nrab.
(4) Graphite phaj sealing nplhaib: Hauv tib neeg lub siab, graphite yog ib yam khoom uas tsis muaj elasticity thiab toughness, tab sis graphite uas tau kho tshwj xeeb yog mos hauv kev ntxhib los mos thiab muaj elasticity zoo. Nyob rau hauv txoj kev no, lub tshav kub tsis kam thiab tshuaj stability ntawm graphite tuaj yeem pom nyob rau hauv cov khoom siv gasket; Ntxiv mus, lub gasket muaj ib tug me me compression quab yuam thiab zoo heev sealing nyhuv. Cov graphite no tseem tuaj yeem ua rau hauv ib txoj siv, uas tuaj yeem ua ke nrog ib txoj siv hlau los tsim lub qhov txhab gasket nrog kev ua tau zoo heev. Qhov tshwm sim ntawm graphite phaj sealing rings thiab graphite----hlau qhov txhab gaskets yog ib qho tseem ceeb nyob rau hauv high-temperature corrosion-resistant sealing. Hom gasket no tau tsim thiab siv ntau nyob txawv teb chaws.
