Centrifugal Pump Mechanical Seal Replacement Guide

Mechanical seals yog cov khoom tseem ceeb uas feem ntau siv rau hauv cov khoom siv, dav siv hauv cov khoom siv sib hloov xws li twj, compressors, thiab agitators los tiv thaiv kev tawm xov xwm thiab kev nkag mus ntawm cov impurities sab nraud. Kev tshem tawm kom zoo, kev teeb tsa, kev xaiv, thiab kev siv cov khoom siv sib khi yog qhov tseem ceeb rau kev ua haujlwm ntawm cov khoom siv. Kab lus no yuav muab cov ncauj lus qhia ntxaws ntxaws txog cov tshuab foob thiab muab cov lus qhia ua haujlwm.

 

 

• Kev paub yooj yim ntawm mechanical seals

 

Txhais ntawm Mechanical Seals

Lub tshuab foob yog ib qho cuab yeej uas tso siab rau qhov kev sib cuag ntawm qhov kawg ntawm lub ntsej muag ntawm ib lossis ntau khub ntawm perpendicular dynamic thiab zoo li qub rings kom ua tiav ib lub foob, los ntawm kev pabcuam sealing. Nws tiv thaiv cov kua dej kom zoo thiab muaj lub neej ua haujlwm ntev.

 

Kev sib xyaw ntawm Mechanical Seals

• Mechanical seals feem ntau muaj cov hauv qab no:
• Rotating nplhaib: Tig nrog cov ncej thiab cov phooj ywg nrog lub nplhaib nyob ruaj ruaj los tsim lub ntsej muag sealing.
• Lub nplhaib ruaj ruaj: Tsau rau cov khoom siv vaj tse thiab cov phooj ywg nrog lub nplhaib tig kom ua tiav lub foob.
• Caij nplooj ntoos hlav: Muab thawj lub siab los xyuas kom meej haum ntawm lub rotating thiab nyob ruaj ruaj rings.
• Lub nplhaib sib khi: Tiv thaiv cov kua dej los ntawm cov axial lossis radial kev taw qhia.
• Transmission mechanism: Xa cov kev sib hloov ntawm cov ncej mus rau lub nplhaib rotating.

 

Classification ntawm Mechanical Seals

• Los ntawm Cov Qauv: Ib qho - ntsej muag foob, Ob npaug - ntsej muag foob, Multi- ntsej muag foob.
• Los ntawm Nruab Nrab Siab: Internal foob, Sab nraud foob.
• Los ntawm Sealing Nruab Nrab: Qhuav roj foob, kua foob, roj foob.

 

• Kev khiav hauj lwm cov lus qhia rau kev hloov mechanical seals

 

Kev npaj

Tshem tawm cov khoom siv hluav taws xob thiab tshem tawm qhov nruab nrab ntawm cov khoom siv.

Npaj cov cuab yeej disassembly, xws li wrenches, screwdrivers, thiab roj hmab mallets.

Hnav cov khoom tiv thaiv tsim nyog, xws li hnab looj tes thiab tsom iav.

 

Cov kauj ruam installation

1. Cais thiab Xauv. Ua kom tiav daim ntawv lockout. Xyuas kom tseeb tias lub zog yog xoom. Lub twj tso kua mis tau depressurized, emptied, thiab txias.
2. Tshem lub hau thiab coupling. Tshem lub hau npog, npog phaj, thiab cov khoom sib txuas raws li tsim. Kos cov hauj lwm txheeb ze ntawm cov couplings rau siv thaum lub sij hawm reassembly.
3. Cov ntaub ntawv. Siv cov duab ua ntej tshem tawm txhua yam khoom. Sau cov kev taw qhia ntawm lub caj pas, qub foob, thiab txhua qhov chaw uas yuav raug ntsia rov qab.
4. Tshem Lub Hwj Huam Laus. Tshem lub caj pas. Tshem lub nplhaib nyob ruaj ruaj thiab tig los ua ke raws li tus neeg tsim khoom cov lus qhia. Cia lub ntsej muag kawg rau kev kuaj mob - tsis txhob ntxuav lawv.
5. huv. Ntxuav lub foob kab noj hniav, caj pas mounting nto, thiab tag nrho cov chaw tiv tauj. Xyuas kom tsis muaj khib nyiab, xoob xeb, los yog hais.
6. Tshawb xyuas. Cov kauj ruam no qhia qhov txawv ntawm kev hloov lub foob thiab hloov lub foob uas yuav tsis rov-xov.
7. Nruab Lub Foob Tshiab. Tsis txhob kov qhov kawg ntawm lub ntsej muag nrog koj cov ntiv tes - cov roj ntawm daim tawv nqaij yuav kis kab mob ntawm lub foob. Tsuas yog siv cov roj nplua nyeem pom zoo rau O- nplhaib thiab zawv zawg qhov chaw. Raws li tus tsim, nruab lub nplhaib nyob ruaj ruaj rau hauv lub caj pas thiab mount lub rotating sib dhos rau ntawm ncej los yog bushing. Tsis txhob yuam nws. Yog tias nws tsis haum, ib yam dab tsi tsis ncaj ncees lawm: kos, tsis txhob thawb.
8. Rov nruab. Tighten lub caj pas raws li cov neeg tsim khoom cov lus qhia. Lub zog tsis sib xws ntawm lub caj pas yuav ua rau lub nplhaib nyob ruaj ruaj kom qaij; lub caj pas xoob yuav tiv thaiv kom tsis txhob raug kaw kom nruj. Reconnect cov kab ntws tawm. Reinstall lub coupling, tiv thaiv, thiab npog.

 

Cov kev ceev faj

Tsis txhob ntaus cov ntsaws ruaj ruaj nrog cov khoom tawv thaum lub sij hawm disassembly los tiv thaiv kev puas tsuaj rau lub sealing nto.

Khaws cov khoom kom raug tom qab disassembly kom tsis txhob poob los yog muaj kab mob.

 

• Tshaj tawm -kev sim hloov pauv thiab tswj kev pib

Ua ntej pib:

• Lub twj tso kua mis yuav tsum tig dawb, yog tias tsim tau. Yog tias muaj kev tiv thaiv, nres thiab xyuas.
• Lub twj tso kua mis tau ua tiav tag nrho. Qhib lub qhov cua valve. Paub meej tias cov kua hauv cov kab nqus.
• Flush qhib. Paub meej tias lub siab thiab ntws raws li qhov kev pab cuam teeb tsa. Yog hais tias lub foob cia siab rau qhov dej ntws tawm, tsis txhob pib yam tsis muaj dej ntws tawm.
• Valves nyob rau hauv txoj hauj lwm raug: Suction valve qhib, tso tawm valve ua raws li cov txheej txheem pib.
• Shield thiab npog yog reinstalled.

 

Controlled Startup:

• Pib pib luv luv -up. Saib xyuas cov dej xau, suab nrov, thiab kaw qhov chaw sov.
• Txheeb xyuas qhov tso tawm siab thiab muab piv rau cov qauv tsim. Lub siab txawv txav qhia tau hais tias muaj teeb meem nrog kev nqus, cavitation, lossis qhov chaw ua haujlwm sib txawv ntawm qhov nkhaus.
• Txheeb xyuas qhov kub thiab txias. Kev kub ceev ceev qhia tias lubrication tsis txaus, dej ntws tsis txaus, lossis qhov kawg tsis zoo - ntsib ntsej muag.

⚠️ Ceeb toom:Tsis txhob cog lus tias "zero leakage." Qee cov ntsaws ruaj ruaj yuav tsum tau tswj hwm, feeb ntawm cov dej xau los lubricate lub ntsej muag kawg, tshwj xeeb tshaj yog thaum pib tawg - nyob rau lub sijhawm. Kev lees txais cov dej xau yog txhais los ntawm cov chaw tsim khoom foob; tsis muaj universal nqi.

Tom qab Startup:

• Saib xyuas yam tsawg kawg ib lub voj voog ua haujlwm tiav.
• Sau tus nqi xau, qhov kub thiab txias, thiab kev vibration raws li lub hauv paus tshiab.
• Yog hais tias tus nqi xau nce es tsis txhob stabilizing, tam sim ntawd nres lub tshuab thiab kho qhov teeb meem kom tsis txhob muaj kev puas tsuaj irreversible.

 

Lub disassembly, installation, xaiv, thiab kev siv cov tshuab foob yog qhov tseem ceeb rau kev ua haujlwm ntawm cov khoom siv. Phau ntawv qhia kev khiav hauj lwm no pab cov neeg siv nkag siab zoo dua cov tshuab foob, txuas cov cuab yeej siv lub neej, thiab txo qis kev ua haujlwm. Hauv kev xyaum, cov tshuab foob yuav tsum tau siv yooj yim raws li cov txheej txheem tshwj xeeb ntawm cov cuab yeej siv los xyuas kom meej tias lawv cov kev ua tau zoo yog siv tag nrho.