1. Radial quab yuam
Kev lag luam txheeb cais qhia tias qhov laj thawj loj tshaj plaws rau cov twj centrifugal kom tsis txhob khiav yog qhov tsis ua hauj lwm ntawm cov bearings thiab / lossis cov khoom siv foob. Cov kabmob thiab cov ntsaws ruaj ruaj yog "canaries hauv kuv" - lawv yog cov cim qhia thaum ntxov ntawm kev noj qab haus huv ntawm cov twj tso kua dej thiab tseem yog qhov ua ntej rau cov xwm txheej sab hauv ntawm lub tshuab twj tso kua mis.
Txhua tus neeg uas tau nyob hauv kev lag luam no ntev ntev yuav paub tias ib qho ntawm cov kev coj ua zoo tshaj plaws yog ua cov twj tso kua mis ntawm lossis ze rau lawv qhov Qhov Zoo Tshaj Plaws (BEP). Ntawm BEP, lub twj tso kua mis tsim yuav tiv taus qhov tsawg kawg nkaus radial quab yuam. Lub resultant vector ntawm tag nrho cov radial rog generated los ntawm kev khiav hauj lwm deb ntawm BEP ua ib tug 90℃kaum sab xis nrog lub rotor, sim deflect thiab khoov lub ncej.
Qhov loj radial quab yuam thiab qhov tshwm sim ntawm ncej deflection yog cov killers ntawm mechanical seals thiab tseem ceeb hauv shortening lub neej ntawm bearings. Yog tias nws loj txaus, lub zog radial yuav ua rau cov ncej deflect lossis khoov. Yog tias lub twj tso kua mis nres thiab ntsuas qhov khiav ntawm lub ncej, tsis muaj qhov yuam kev yuav tshwm sim vim tias nws yog ib qho mob dynamic, tsis yog qhov zoo li qub.
Lub dabtsi yog khoov ncej (deflection) khiav ntawm 3600rpm yuav deflect ob zaug ib kiv puag ncig, yog li nws tiag tiag khoov 7200 zaug ib feeb. Qhov siab cyclic deflection ua rau nws nyuaj rau lub sealing nto kom muaj kev sib cuag thiab tswj cov kua txheej uas yuav tsum tau rau kev sealing zoo.
2. Roj paug
Rau cov kabmob pob, ntau dua 85% ntawm cov kabmob tsis ua haujlwm yog tshwm sim los ntawm kev nkag ntawm av, khoom txawv teb chaws, lossis dej. Tsuas yog 250 feem ntawm ib lab (250ppm) ntawm cov dej yuav txo tau lub neej ntawm cov kabmob los ntawm plaub zaug.
Tsim nyog siv cov roj lubricating yog qhov tseem ceeb rau nws txoj sia.
3. Kev nqus pa siab
Lwm yam tseem ceeb uas cuam tshuam rau lub neej muaj xws li suction pressure, coupling alignment, thiab pipeline stress.
Rau ib zaug -theem kab rov tav cantilever txheej txheem twj tso kua mis, kev sib xyaw axial quab yuam ua ntawm lub rotor yog coj mus rau qhov nkag, yog li rau qee qhov, qhov txwv thim rov qab nqus siab ua tau txo cov axial quab yuam, yog li txo cov load ntawm cov kabmob thrust thiab txuas nws lub neej kev pab cuam.
4. Calibration
Misalignment ntawm lub twj tso kua mis thiab lub cev muaj zog tuaj yeem ua rau overload ntawm radial bearings. Thaum xam cov misalignment, lub radial bearing lub neej yog ib tug exponential yam.
Piv txwv li, rau qhov sib txawv me me ntawm tsuas yog 1.52mm, tus neeg siv kawg yuav ntsib qee yam ntawm cov kabmob lossis cov teeb meem sib txuas tom qab khiav mus rau peb mus rau tsib lub hlis. Txawm li cas los xij, rau qhov sib txawv ntawm 0.0254mm, tib lub twj tso kua mis tuaj yeem ua haujlwm rau ntau tshaj 90 lub hlis.
5. Pipeline kev ntxhov siab
Pipeline kev ntxhov siab yog tshwm sim los ntawm qhov tsis zoo ntawm qhov nqus thiab / lossis cov kav dej tawm nrog lub twj tso kua mis flange. Txawm tias nyob rau hauv lub twj tso kua mis tsim qauv, cov raj xa dej siab tsim tau yooj yim hloov cov peev txheej siab rau cov bearings thiab lawv cov vaj tse. Kev quab yuam (strain) ua rau tsis tsim nyog ntawm bearings thiab / los yog inconsistency nrog rau lwm yam bearings, ua rau lub centerline nyob rau hauv txawv dav hlau.
6. Cov yam ntxwv ua kua dej
Cov yam ntxwv ntawm cov kua dej xws li pH, viscosity, thiab lub ntiajteb txawj nqus yog qhov tseem ceeb. Yog hais tias qhov nruab nrab yog acidic los yog corrosive, qhov sib cuag ntawm lub twj tso kua mis, xws li cov ntaub ntawv casing thiab impeller, yuav tsum tau tswj lawv cov functionality. Qhov kom muaj nuj nqis, qhov loj me, cov duab, thiab kev sib tsoo zoo ntawm cov khoom muaj nyob hauv cov kua yuav yog qhov cuam tshuam rau cov khoom.
7. Cov xwm txheej ua haujlwm
Kev nruj ntawm lub xeev ua haujlwm yog lwm qhov tseem ceeb: ntau npaum li cas lub twj tso kua mis pib hauv ib lub sijhawm.
Qee lub twj tso kua mis pib thiab nres txhua ob peb feeb. Piv nrog rau cov twj uas ua haujlwm tsis tu ncua nyob rau hauv tib lub sijhawm, cov twj tso kua mis hauv kev ua haujlwm hnav tawm ntawm tus nqi exponential. Hauv qhov xwm txheej no, tus qauv tsim kho sai yuav tsum tau hloov pauv.
8. Cavitation nyiaj pub dawb
Qhov siab dua cov npoo ntawm qhov muaj qhov zoo nqus lub taub hau (NPSHA), qhov tsis tshua muaj lub twj tso kua mis yuav muaj cavitation yog tias nws tshaj qhov xav tau net zoo nqus taub hau (NPSHR). Cavitation tuaj yeem ua rau lub twj tso kua mis impeller puas thiab tsim kev vibrations uas tuaj yeem cuam tshuam rau cov ntsaws ruaj ruaj thiab bearings.
9. Pump ceev
Kev khiav hauj lwm ceev ntawm lub twj tso kua mis yog lwm qhov tseem ceeb. Piv txwv li, lub twj tso kua mis 3550 rpm hnav tawm 4 mus rau 8 zaug sai dua li lub twj tso kua mis 1750 rpm.
10. Impeller tshuav nyiaj li cas
Cov impellers tsis sib npaug ntawm cov twj tso kua mis lossis qee qhov qauv ntsug tuaj yeem ua rau cov ncej deflection, ib yam li lub zog radial ntawm lub twj tso kua mis thaum khiav tawm ntawm BEP. Radial sib txawv thiab deflection yuav tshwm sim ib txhij. Yog hais tias lub impeller yog trimmed rau ib qho laj thawj, nws yuav tsum tau rebalanced.
11. Cov yeeb nkab zoo li
Lwm qhov kev txiav txim siab tseem ceeb rau kev ncua lub neej twj tso kua mis yog qhov geometry ntawm cov raj xa dej lossis cov kua dej li cas 'loaded' rau hauv lub twj tso kua mis.
Piv txwv li, lub luj tshib ntawm ntsug suction sab ntawm lub twj tso kua mis muaj kev phom sij tsawg dua li lub luj tshib kab rov tav. Lub hydraulic load ntawm lub impeller yog ntau uniform, yog li cov load ntawm bearings kuj zoo ib yam.
12. Ua haujlwm kub
Txawm hais tias nws yog qhov kub siab lossis qis qis, qhov ua haujlwm kub ntawm lub twj tso kua mis, tshwj xeeb tshaj yog qhov hloov pauv ntawm qhov kub thiab txias, yuav muaj kev cuam tshuam loj rau lub neej kev pabcuam thiab kev ntseeg siab ntawm lub twj tso kua mis. Kev ua haujlwm kub ntawm lub twj tso kua mis tseem ceeb heev, yog li lub twj tso kua mis yuav tsum tau tsim los ua haujlwm ntawm qhov kub thiab txias. Txawm li cas los xij, qhov tseem ceeb tshaj yog qhov hloov pauv ntawm qhov kub thiab txias. Tawm tswv yim (nyob rau hauv ib qho kev saib xyuas ntau dua) kom qhov kev hloov pauv qis dua 2 degrees Fahrenheit ib feeb. Cov khoom sib txawv thiab cov ntaub ntawv nthuav dav thiab sib cog lus ntawm tus nqi sib txawv, uas tuaj yeem cuam tshuam qhov sib txawv thiab kev ntxhov siab.
