Lub valve npauj npaim yog dab tsi?

Lubnpauj npaim valvetau tsim nyob rau hauv Tebchaws Meskas xyoo 1930. Nws tau qhia rau Nyiv xyoo 1950 thiab tsis tau siv dav hauv Nyiv txog xyoo 1960. Nws tsis tau nrov hauv kuv lub tebchaws txog xyoo 1970. Cov yam ntxwv tseem ceeb ntawm npauj npaim li qub yog: lub zog ua haujlwm me me, qhov chaw teeb tsa me me thiab qhov hnyav sib dua. Siv DN1000 ua piv txwv, tusnpauj npaim valveyog li ntawm 2T, thaum lublub qhov rooj vagyog li ntawm 3.5T. Lubnpauj npaim valveyooj yim rau kev sib xyaw nrog ntau yam khoom siv tsav thiab muaj kev ruaj khov thiab kev ntseeg siab. Qhov tsis zoo ntawm cov roj hmab-kaw npauj npaim li qub yog tias thaum siv rau throttling, cavitation yuav tshwm sim vim yog siv tsis raug, ua rau lub rooj zaum roj hmab tev tawm thiab puas tsuaj. Yog li ntawd, yuav ua li cas xaiv nws kom raug nyob ntawm cov xwm txheej ua haujlwm. Kev sib raug zoo ntawm qhov qhib ntawm lub npauj npaim li qub thiab qhov ntws yog qhov tseeb linear. Yog tias nws siv los tswj qhov ntws, nws cov yam ntxwv ntws kuj tseem muaj feem cuam tshuam nrog qhov tsis kam ntws ntawm cov kav dej. Piv txwv li, yog tias lub valve caliber thiab daim ntawv ntawm ob lub kav dej yog tib yam, tab sis cov coefficient poob ntawm cov kav dej sib txawv, qhov ntws ntawm lub valve kuj yuav txawv heev. Yog tias lub valve nyob rau hauv lub xeev ntawm qhov loj throttling amplitude, cavitation yog qhov tshwm sim rau sab nraub qaum ntawm lub phaj valve, uas yuav ua rau lub valve puas tsuaj. Nws feem ntau siv sab nraum 15 °. Thaum lubnpauj npaim valveyog nyob rau hauv nruab nrab qhov qhib, qhov qhib zoo li tsim los ntawm lub cev valve thiab qhov kawg ntawm lub phaj npauj npaim yog nyob rau hauv lub qhov valve, thiab cov xeev sib txawv tau tsim rau ob sab. Qhov kawg ntawm lub phaj npauj npaim ntawm ib sab txav mus rau hauv qhov kev taw qhia ntawm cov dej ntws, thiab sab tod txav mus rau hauv qhov kev taw qhia ntawm cov dej ntws. Yog li ntawd, lub cev valve thiab lub phaj valve ntawm ib sab tsim ib qho qhib zoo li nozzle, thiab sab tod zoo li qhov qhib zoo li lub qhov throttle. Sab nozzle muaj qhov nrawm nrawm dua li sab throttle, thiab lub siab tsis zoo yuav raug tsim nyob rau hauv lub valve ntawm sab throttle, thiab lub foob roj hmab feem ntau yuav poob tawm. Lub zog ua haujlwm ntawmnpauj npaim valvetxawv vim yog qhov qhib sib txawv thiab qhov qhib thiab kaw cov lus qhia ntawm lub valve. Lub zog torque tsim los ntawm qhov sib txawv ntawm cov taub hau dej sab saud thiab sab qis ntawm lub valve npauj npaim kab rov tav, tshwj xeeb tshaj yog lub valve loj-txoj kab uas hla, vim qhov tob ntawm dej, tsis tuaj yeem tsis quav ntsej. Tsis tas li ntawd, thaum lub luj tshib raug ntsia rau ntawm sab nkag ntawm lub valve, qhov dej ntws bias raug tsim, thiab lub zog torque yuav nce ntxiv. Thaum lub valve nyob hauv qhov qhib nruab nrab, lub tshuab ua haujlwm yuav tsum tau xauv nws tus kheej vim yog qhov kev ua ntawm lub zog ntws dej.

Tuam Tshoj muaj ntau lub tuam txhab lag luam valve, tab sis nws tsis yog lub zog valve. Feem ntau hais lus, kuv lub teb chaws tau nkag mus rau hauv qeb ntawm lub ntiaj teb lub zog valve, tab sis hais txog qhov zoo ntawm cov khoom, kuv lub teb chaws tseem nyob deb ntawm kev ua lub zog valve. Kev lag luam tseem muaj kev tsim khoom tsawg, kev tshawb fawb thiab kev txhim kho qis ntawm cov valves uas phim cov khoom lag luam siab, thiab qib thev naus laus zis tsim khoom qis hauv kev lag luam valve, thiab kev lag luam xa khoom tuaj thiab xa tawm tseem nthuav dav. Yeej tsis muaj ntau lub tuam txhab valve uas tuaj yeem muaj sia nyob hauv kev ua lag luam. Txawm li cas los xij, qhov kev poob siab ceev ceev hauv kev lag luam valve no yuav coj cov cib fim loj heev, thiab qhov tshwm sim ntawm qhov kev poob siab yuav ua rau kev ua haujlwm ntawm kev ua lag luam muaj laj thawj ntau dua. Txoj kev mus rau qhov chaw ntawm cov valves siab yog "bumpy heev". Cov khoom yooj yim tau dhau los ua qhov tsis txaus uas txwv tsis pub kev txhim kho ntawm kuv lub teb chaws kev lag luam tsim khoom mus rau qib siab. Thaum Lub Tswv Yim Tsib Xyoos Thib 12, tsoomfwv yuav txuas ntxiv nce qhov chaw ntawm cov khoom siv khoom siv siab. Ntawm no peb xaiv ntau qhov kev txhim kho tseem ceeb hauv "Daim Ntawv Qhia Kev Siv" thiab cov lag luam valve sawv cev rau kev tshuaj xyuas qhov ua tau ntawm kev hloov pauv ntshuam. Los ntawm kev tshuaj xyuas, nws tuaj yeem pom tias qhov ua tau ntawm kev hloov pauv ntawm cov li qub hauv ntau yam kev lag luam me sib txawv heev, thiab cov li qub siab kawg xav tau kev taw qhia ntxiv thiab kev txhawb nqa kev tshawb fawb.

Kev lag luam valve ua lub luag haujlwm tseem ceeb heev ua qhov txuas tseem ceeb hauv kev lag luam tsim khoom siv hauv kev txhim kho kev lag luam hauv lub tebchaws. Txij li thaum qib ntawm kuv lub teb chaws kev lag luam tsim khoom hauv tsev tseem nyob deb ntawm qib siab thoob ntiaj teb, ntau qhov tseem ceebcov li qubnrog cov kev ntsuas siab, kub siab thiab siab siab, thiab qib phaus siab yeej ib txwm vam khom rau kev xa khoom tuaj. Piv txwv li, European OMAL hom yeej ib txwm yog qhov kev xaiv tseem ceeb ntawm kev lag luam valve hauv tsev. Txhawm rau txhawb kev ua haujlwm hauv zos ntawm cov li qub, tom qab Pawg Sab Laj Hauv Xeev tau tshaj tawm "Ntau Lub Tswv Yim Txog Kev Ua Kom Rov Qab Zoo Dua ntawm Kev Tsim Khoom Siv", cov chaw haujlwm hauv xeev tau ua ntau qhov kev xa tawm loj raws li qhov yuav tsum tau ua ntawm lub xeev rau kev ua haujlwm hauv zos ntawm cov khoom siv loj. Ua raws li National Development and Reform Commission, China Machinery Industry Federation thiab China General Machinery Industry Association tau xa tawm thiab tsim ib qholub valveTxoj kev npaj ua haujlwm rau cov khoom siv tseem ceeb hauv cov teb cuam tshuam, thiab tau sib koom tes nrog cov chaw haujlwm cuam tshuam ntau zaus. Tam sim no qhov chaw ntawm cov li qub tau tsim kev pom zoo hauv kev lag luam valve hauv tsev. Siv zog txais yuav cov qauv thoob ntiaj teb rau kev tsim khoom; nqus cov qauv tsim zoo txawv teb chaws (suav nrog cov thev naus laus zis patent); kev kuaj khoom thiab kev tshuaj xyuas kev ua tau zoo raug ua raws li cov qauv thoob ntiaj teb; nqus cov kev paub txog cov txheej txheem tsim khoom txawv teb chaws thiab muab qhov tseem ceeb rau kev tshawb fawb thiab kev txhawb nqa cov ntaub ntawv tshiab; piav qhia cov txheej txheem kev teeb tsa thiab cov xwm txheej ua haujlwm ntawm cov khoom siv valve siab-parameter, thiab lwm yam yog txoj hauv kev los ua kom cov txheej txheem hauv zos sai dua, txhawb kev hloov kho tshiab ntawm cov khoom siv valve, thiab paub txog qhov chaw ntawm cov li qub. Nrog rau kev nrawm ntawm kev hloov kho dua tshiab hauv kev lag luam valve, kev lag luam yav tom ntej yuav yog kev sib tw ntawm cov khoom siv valve zoo thiab kev nyab xeeb thiab cov khoom lag luam. Cov khoom lag luam yuav txhim kho mus rau hauv kev coj ntawm thev naus laus zis siab, cov kev teeb tsa siab, kev tiv thaiv corrosion muaj zog, thiab lub neej ntev. Tsuas yog los ntawm kev tsim kho tshiab thev naus laus zis, kev txhim kho cov khoom lag luam tshiab, thiab kev hloov pauv thev naus laus zis tuaj yeem txhim kho qib thev naus laus zis khoom kom tau raws li cov khoom siv hauv tsev sib phim thiab paub txog qhov chaw ntawm cov li qub. Nyob rau hauv qhov chaw xav tau loj heev, kuv lub teb chaws kev lag luam tsim khoom valve yuav qhia tau tias muaj kev cia siab zoo dua.