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Ntsuas axial quab yuam nyob rau hauv multistage centrifugal twj yog ib qho tseem ceeb thev naus laus zis kom ua haujlwm ruaj khov. Vim yog cov txheej txheem ntawm impellers, axial rog tau nce ntau (txog li ob peb tons). Yog tias tsis muaj qhov sib npaug zoo, qhov no tuaj yeem ua rau cov kabmob overload, foob puas, lossis txawm tias cov khoom siv tsis ua haujlwm. Hauv qab no yog cov txheej txheem axial quab yuam ntsuas, nrog rau lawv cov hauv paus ntsiab lus, qhov zoo, thiab qhov tsis zoo.
1.Symmetrical Impeller Arrangement (rov qab-rau-rov qab / ntsej muag-rau-lub ntsej muag)
Nyob rau hauv kev tsim ntawm axial quab yuam sib npaug ntawm cov twj centrifugal niaj hnub, lub impeller theem feem ntau yog xaiv raws li tus lej, vim hais tias thaum lub impeller theem yog tus lej, lub impeller symmetrical faib txoj kev tuaj yeem siv los sib npaug ntawm axial quab yuam ntawm cov cuab yeej, thiab lub zog axial generated los ntawm symmetrically faib impeller nyob rau hauv cov txheej txheem kev khiav hauj lwm yog sib npaug ntawm qhov loj thiab qhov sib npaug. qib macroscopic. Nyob rau hauv tus txheej txheem ntawm kev tsim, nws yuav tsum tau muab sau tseg tias lub sealing throttling loj ua ntej lub inlet ntawm lub rov qab impeller yog raws li txoj kab uas hla ntawm lub impeller los xyuas kom meej sealing zoo.
●Txoj Cai: Cov impellers uas nyob ib sab yog teem rau cov lus qhia sib txawv kom lawv cov axial quab yuam tshem tawm ib leeg.
●Rov qab-rau-rov qab: Ob txheej ntawm impellers yog ntsia symmetrically nyob ib ncig ntawm lub twj tso kua mis ncej nruab nrab.
●ntsej muag: Cov impellers tau teem rau sab hauv lossis sab nraud hauv ib qho kev teeb tsa mirrored.
●Qhov zoo: Tsis xav tau cov khoom siv ntxiv; qauv yooj yim; siab ntsuas efficiency (tshaj 90%).
●Qhov tsis zoo: Complex twj tso kua mis tsim tsev; nyuaj khiav txoj kev optimization; tsuas yog siv tau rau cov twj tso kua mis nrog ib tus lej ntawm cov theem.
●Daim ntawv thov: High-pressure boiler feed twj, petrochemical multistage twj.
2. Balancing Drum
Qhov sib npaug nruas qauv (tseem hu ua qhov sib npaug piston) tsis muaj qhov nruj axial khiav tshem tawm, uas tuaj yeem them nyiaj rau feem ntau ntawm axial thrust, tab sis tsis yog tag nrho cov axial thrust, thiab tsis muaj kev them nyiaj ntxiv thaum tsiv hauv txoj hauj lwm axial, thiab thrust bearings feem ntau yuav tsum tau. Qhov kev tsim no yuav muaj ntau dua kev rov ua haujlwm sab hauv (sab hauv to) tab sis muaj kev tiv thaiv ntau dua ntawm kev pib, kaw, thiab lwm yam xwm txheej.
●Txoj Cai: Lub nruas cylindrical yog ntsia tom qab lub impeller kawg. High-pressure kua ntws los ntawm qhov sib txawv ntawm lub nruas thiab casing mus rau hauv ib tug tsawg-siab chamber, tsim ib tug counteracting quab yuam.
● Aqhov zoo: Muaj peev xwm ntsuas qhov muaj peev xwm, tsim nyog rau kev ua haujlwm siab, ntau theem twj (piv txwv li, 10+ theem).
●Qhov tsis zoo: Kev poob qis (~ 3-5% ntawm tus nqi ntws), txo kev ua haujlwm. Yuav tsum tau ntxiv cov kav dej sib npaug los yog cov txheej txheem rov ua dua tshiab, ua rau kev saib xyuas tsis yooj yim.
●Daim ntawv thov: Loj multistage centrifugal twj tso kua mis (piv txwv li, cov kav dej ntev ntev).
3.Sib npaug Disk
Raws li ib qho kev tsim qauv hauv cov txheej txheem tsim ntawm axial quab yuam sib npaug ntawm cov cuab yeej niaj hnub multistage centrifugal twj tso kua mis, qhov sib npaug disc txoj kev tuaj yeem hloov kho me ntsis raws li qhov xav tau, thiab qhov sib npaug quab yuam feem ntau yog tsim los ntawm ntu ntu nruab nrab ntawm radial clearance thiab axial clearance ntawm lub disk, thiab lwm qhov feem ntau yog tsim los ntawm cov axial clearance ntawm ob lub luag hauj lwm ntawm lub radial clearance thiab lub luag hauj lwm ntawm lub disc. ntsuas lub zog axial. Piv nrog rau lwm txoj kev, qhov kom zoo dua ntawm txoj kev sib npaug phaj yog tias txoj kab uas hla ntawm lub phaj tshuav yog qhov loj dua thiab qhov rhiab heev dua, uas ua rau kev ua haujlwm ruaj khov ntawm cov khoom siv. Txawm li cas los xij, vim qhov me me axial khiav clearance, qhov kev tsim no muaj kev cuam tshuam rau kev hnav thiab kev puas tsuaj nyob rau hauv cov xwm txheej ib ntus.
●Txoj Cai: Ib qho chaw txav tau raug ntsia tom qab lub impeller kawg. Lub siab sib txawv ntawm lub disk dynamically kho nws txoj hauj lwm los tiv thaiv axial quab yuam.
●Qhov zoo: Tsis siv neeg hloov mus rau axial force variations; siab ntsuas precision.
●Qhov tsis zoo: Kev sib txhuam ua rau hnav, yuav tsum tau hloov lub sijhawm. rhiab heev rau cov kua dej huv (particle tuaj yeem cuam tshuam lub disk).
●Daim ntawv thov: Thaum ntxov-theem multistage huv-dej twj tso kua mis (maj mam hloov los ntawm kev ntsuas nruas).
4.Sib npaug Nruas + Disk Combination
Piv nrog rau txoj kev sib npaug phaj, qhov sib npaug phaj nruas txoj kev sib txawv ntawm qhov loj ntawm nws qhov throttle bushing qhov loj dua qhov loj ntawm lub impeller hub, thaum qhov sib npaug disc xav tau qhov loj ntawm lub throttle bushing kom sib haum rau qhov loj ntawm lub impeller hub. Feem ntau hais lus, nyob rau hauv tus qauv tsim ntawm qhov sib npaug phaj nruas, qhov sib npaug quab yuam tsim los ntawm cov phaj tshuav nyiaj ntau tshaj ib nrab ntawm tag nrho cov axial quab yuam, thiab qhov siab tshaj plaws tuaj yeem ncav cuag 90% ntawm tag nrho cov axial quab yuam, thiab lwm qhov feem ntau yog muab los ntawm qhov sib npaug nruas. Nyob rau tib lub sijhawm, qhov sib npaug ntawm qhov sib npaug ntawm lub nruas sib npaug yuav ua rau txo qis qhov sib npaug ntawm cov phaj sib npaug, thiab sib txuas ua ke txo qhov loj ntawm cov phaj tshuav, yog li txo qhov hnav ntawm cov phaj tshuav nyiaj li cas, txhim kho lub neej kev pab cuam ntawm cov khoom siv, thiab ua kom muaj kev ua haujlwm zoo ntawm ntau theem centrifugal twj.
●Txoj Cai: Lub nruas tuav feem ntau ntawm lub zog axial, thaum lub disk zoo-tunes lub zog seem.
●Qhov zoo: Ua ke ruaj khov thiab yoog raws, haum rau kev ua haujlwm sib txawv.
●Qhov tsis zoo: Cov txheej txheem nyuaj; tus nqi siab dua.
●Daim ntawv thov: Cov twj muaj kev ua haujlwm siab (piv txwv li, nuclear reactor coolant twj).
5. Thrust Bearings (Auxiliary Balancing)
●Txoj Cai: Angular contact pob bearings lossis Kingsbury bearings absorb residual axial quab yuam.
●Qhov zoo: Txhim khu kev thaub qab rau lwm txoj kev ntsuas.
●Qhov tsis zoo: Yuav tsum tau lubrication tsis tu ncua; luv lifespan nyob rau hauv siab axial loads.
●Daim ntawv thov: Cov twj me me mus rau nruab nrab multistage twj los yog cov twj tso kua mis ceev.
6. Ob chav Suction Impeller tsim
●Txoj Cai: Ob chav suction impeller yog siv nyob rau hauv thawj theem los yog nruab nrab theem, ntsuas axial quab yuam los ntawm dual-sab inflow.
●Qhov zoo: Ua kom muaj txiaj ntsig zoo thaum txhim kho cavitation kev ua tau zoo.
●Qhov tsis zoo: Tsuas yog sib npaug ib-theem axial quab yuam; Lwm txoj hauv kev xav tau rau cov twj tso kua mis multistage.
7. Hydraulic Balance Holes (Impeller Backplate Qhov)
●Txoj Cai: Lub qhov yog drilled nyob rau hauv lub impeller backplate, tso cai rau high-pressure kua recirculate mus rau lub low-pressure cheeb tsam, txo axial quab yuam.
●Qhov zoo: Yooj yim thiab tus nqi qis.
●Qhov tsis zoo: Txo cov twj tso kua mis efficiency (~ 2-4%).Tsuas yog tsim nyog rau kev siv qis axial quab yuam; feem ntau yuav tsum tau ntxiv thrust bearings.
Kev sib piv ntawm Axial Force Balancing Methods
| Txoj kev | Kev ua tau zoo | nyuaj | Tus nqi kho mob | Tej kev siv |
| Symmetrical impellers | ★★★★★ | ★★★ | ★★ | Txawm-theem high-pressure twj tso kua mis |
| Balancing Drum | ★★★★ | ★★★★ | ★★★ | High-head multistage twj tso kua mis |
| Sib npaug Disk | ★★★ | ★★★★ | ★★★★ | Cov kua dej huv, cov khoom sib txawv |
| Nruas + Disk Combo | ★★★★★ | ★★★★★ | ★★★★ | Cov xwm txheej hnyav (nuclear, tub rog) |
| Thrust Bearings | ★★ | ★★ | ★★★ | Residual axial quab yuam ntsuas |
| Ob chav Suction Impeller | ★★★★ | ★★★ | ★★ | Thawj lossis theem nrab |
| Ntsuas qhov | ★★ | ★ | ★ | Cov twj tso kua mis me me |
Lub sij hawm xa tuaj: Mar-29-2025