Kev ua haujlwm tsis ruaj khov ntawm chav hydraulic turbine yuav ua rau kev vibration ntawm hydraulic turbine unit.Thaum qhov kev vibration ntawm hydraulic turbine chav tsev yog qhov hnyav, nws yuav muaj qhov tshwm sim loj heev thiab tseem cuam tshuam rau kev nyab xeeb ntawm tag nrho cov nroj tsuag.Yog li ntawd, kev ruaj ntseg optimization ntsuas ntawm hydraulic turbine tseem ceeb heev.Dab tsi optimization ntsuas muaj?
1) Txhim kho qhov zoo ntawm hydraulic tsim ntawm cov dej turbine, txhim kho nws cov kev ua tau zoo tsim nyob rau hauv cov dej turbine tsim, thiab ua kom ruaj khov ntawm cov dej turbine.Yog li ntawd, nyob rau hauv qhov tseeb tsim ua hauj lwm, designers tsis tsuas yog yuav tsum tau muaj kev txawj ntse kev txawj ntse, tab sis kuj siv zog ua kom zoo tshaj plaws tsim ua ke nrog lawv tus kheej kev paub ua hauj lwm.
Tam sim no, suav cov kua dej dynamics (CFD) thiab cov qauv kuaj tau dav siv.Hauv theem tsim, tus tsim qauv yuav tsum muab cov kev paub dhau los ua haujlwm, siv CFD thiab cov qauv kev sim hauv kev ua haujlwm, ua kom zoo dua ntawm cov ntawv qhia vane airfoil, khiav cov hniav airfoil thiab tawm lub khob hliav qab, thiab sim ua kom muaj txiaj ntsig zoo tswj lub siab hloov pauv amplitude ntawm cov raj raj.Tam sim no, tsis muaj kev sib koom ua ke rau qhov amplitude ntau yam ntawm cov cua ntsawj ntshab siab hloov pauv hauv ntiaj teb.Feem ntau, qhov kev sib hloov ceev ntawm qhov chaw nres tsheb siab lub taub hau yog qhov tsawg thiab qhov kev vibration amplitude yog me me, tab sis qhov tshwj xeeb ceev ntawm lub taub hau fais fab chaw nres tsheb yog siab thiab lub siab fluctuation amplitude kuj loj.
2) Txhim khu kev tswj kom zoo ntawm cov khoom siv dej turbine thiab txhim kho qib txij nkawm.Nyob rau hauv theem tsim ntawm hydraulic turbine, ntxiv dag zog rau cov khoom zoo tswj ntawm hydraulic turbine kuj yog ib txoj hauv kev tseem ceeb los txhim kho nws txoj haujlwm ruaj khov.Yog li ntawd, ua ntej, qhov nruj ntawm qhov ntws ntawm qhov chaw ntawm hydraulic turbine yuav tsum tau txhim kho kom txo nws cov deformation raws li kev ua haujlwm hydraulic.Tsis tas li ntawd, tus tsim qauv yuav tsum tau xav txog qhov muaj peev xwm ntawm resonance ntawm cov cua ntsawj ntshab ntuj zaus thiab cov zaus ntawm cov vortex band thiab khiav lub ntuj zaus ntawm cov khoom qis.
Tsis tas li ntawd, qhov kev hloov pauv ntawm cov hniav yuav tsum tau tsim kev tshawb fawb.Rau lub zos qhov cuab lub zog ntawm cov hniav hauv paus hniav, finite element tsom xam txoj kev yuav tsum tau siv los txo cov kev ntxhov siab concentration.Nyob rau hauv theem ntawm kev khiav lag luam, kev tsim khoom nruj yuav tsum tau txais, thiab stainless hlau yuav tsum tau siv rau hauv cov khoom siv.Thaum kawg, peb-dimensional software yuav tsum tau siv los tsim tus qauv khiav thiab tswj cov hniav tuab.Tom qab tus khiav tau ua tiav, qhov ntsuas qhov sib npaug yuav tsum tau ua kom tsis txhob muaj qhov sib txawv ntawm qhov hnyav thiab txhim kho qhov sib npaug.Txhawm rau kom ntseeg tau qhov zoo ntawm hydraulic turbine, nws cov kev kho tom qab yuav tsum tau ntxiv dag zog.
Cov no yog qee qhov kev ntsuas rau kev ruaj ntseg optimization ntawm hydraulic turbine unit.Rau kev ruaj ntseg optimization ntawm hydraulic turbine, peb yuav tsum pib los ntawm cov theem tsim, muab cov xwm txheej tiag tiag thiab kev ua haujlwm, thiab niaj hnub ua kom zoo dua qub thiab txhim kho nws hauv kev sim qauv.Tsis tas li ntawd, peb yuav tsum ua li cas ntsuas kev ruaj ntseg hauv kev siv?Cia peb kawm ntxiv rau hauv tsab xov xwm tom ntej.
Yuav ua li cas txhim kho thiab ua kom zoo dua qhov ruaj khov ntawm hydrogenerator units hauv kev siv.
Thaum lub sij hawm siv dej turbine, nws cov hniav, khiav thiab lwm yam khoom yuav maj mam raug kev txom nyem cavitation thiab puas.Yog li ntawd, nws yog ib qho tsim nyog yuav tsum kuaj xyuas thiab kho cov dej turbine tsis tu ncua.Tam sim no, txoj kev kho feem ntau hauv kev saib xyuas ntawm hydraulic turbine yog kho vuam.Hauv kev kho tshwj xeeb vuam ua haujlwm, peb yuav tsum nco ntsoov ua tib zoo saib xyuas cov khoom ntawm cov khoom deformed.Tom qab kev txhim kho vuam ua tiav tiav, peb yuav tsum tau ua qhov kev sim tsis muaj kev puas tsuaj thiab polish qhov chaw du.
Txhim khu kev tswj txhua hnub ntawm qhov chaw nres tsheb hydropower yog qhov tsim nyog los xyuas kom meej tias kev ua haujlwm ib txwm muaj ntawm hydraulic turbine unit, thiab txhim kho nws txoj haujlwm ruaj khov thiab ua haujlwm zoo.
① Kev khiav dej num ntawm chav dej turbine yuav tsum tau tswj kom nruj raws li cov kev cai hauv lub tebchaws.Hydropower chaw nres tsheb feem ntau muaj kev ua haujlwm ntawm kev hloov pauv zaus thiab qhov siab tshaj plaws shaving hauv qhov system.Nyob rau hauv ib lub sij hawm luv luv, lub sij hawm ua hauj lwm sab nraum lub guaranteed kev khiav hauj lwm ntau yam yeej ib txwm zam.Hauv kev ua haujlwm tiag tiag, cov sijhawm ua haujlwm sab nraud ntawm kev ua haujlwm yuav tsum tau tswj hwm ntawm li 5% kom deb li deb tau.
② Nyob rau hauv kev ua haujlwm ntawm chav dej turbine, qhov chaw vibration yuav tsum zam kom deb li deb tau.Francis turbine feem ntau muaj ib qho kev vibration cheeb tsam lossis ob thaj chaw vibration, yog li nyob rau hauv qhov pib thiab kaw theem ntawm turbine, txoj kev hla tuaj yeem raug coj los ua kom tsis txhob muaj kev vibration cheeb tsam kom deb li deb tau.Tsis tas li ntawd, hauv kev ua haujlwm niaj hnub ntawm chav dej turbine, tus naj npawb ntawm kev pib thiab kaw yuav tsum raug txo kom ntau li ntau tau.Vim hais tias nyob rau hauv tus txheej txheem ntawm nquag pib thiab kaw, lub turbine ceev thiab dej siab yuav hloov tsis tu ncua, thiab qhov tshwm sim no tsis tshua muaj siab rau kev ruaj ntseg ntawm chav tsev.
③ Hauv lub sijhawm tshiab, kev tshawb fawb thiab thev naus laus zis tau txhim kho sai.Hauv kev ua haujlwm niaj hnub ntawm cov chaw nres tsheb hauv dej, cov txheej txheem tshawb nrhiav qib siab yuav tsum tau siv los saib xyuas cov xwm txheej ntawm cov dej turbine hauv lub sijhawm kom ntseeg tau tias kev ua haujlwm ruaj khov ntawm cov dej turbine.
Cov no yog cov kev ntsuas los txhim kho kev ruaj ntseg ntawm hydro generator units.Nyob rau hauv qhov tseeb kev siv ntawm optimization ntsuas, peb yuav tsum scientific thiab tsim nyog tsim lub optimization scheme raws li peb cov teeb meem tiag tiag.Tsis tas li ntawd, thaum lub sij hawm kho dua qub thiab kev saib xyuas, saib xyuas seb puas muaj teeb meem hauv stator, rotor thiab coj cov kabmob ntawm chav dej turbine, kom tsis txhob muaj kev vibration ntawm chav dej turbine.
Post lub sij hawm: Sep-24-2021
