Lub impellers ntawm Multi-theem Centrifugal Pumps Ib txwm hnav tawm sai heev. Peb Yuav Ua Li Cas?

Txhawm rau daws qhov teeb meem, ib tus yuav tsum xub txheeb xyuas qhov laj thawj. Kev hnav ntawm lub impeller tsis yog feem ntau tshwm sim los ntawm ib qho tseem ceeb, tab sis qhov tshwm sim ntawm kev sib xyaw ua ke ntawm peb yam tseem ceeb. Txheeb xyuas tus neeg ua txhaum: peb "tus neeg phem tom qab" ua rau lub impeller hnav
"Hard{0}}cov tub ntxhais" yaig ntawm cov khoom sib tsoo
Qhov no tuaj yeem suav tias yog tus neeg ua txhaum loj. Hauv cov kua nruab nrab koj thauj, puas muaj ntau dua lossis tsawg dua qee qhov "tsis xav tau"? Xws li cov xuab zeb me me, cov ntaub ntawv hlau, lossis lwm yam khoom tsis huv. Cov khoom no, nyob rau hauv qhov siab - kev sib hloov ceev ntawm lub impeller ntawm ntau txhiab kiv puag ncig ib feeb, ua zoo li suav tsis txheeb cov "xuab zeb log", tsis tu ncua eroding thiab polishing nto ntawm lub impeller hnub thiab hmo ntuj. Tshwj xeeb tshaj yog cov cheeb tsam uas muaj lub siab tshaj plaws khiav ceev, xws li lub inlet ntug ntawm lub impeller, lub taub hau ntawm cov hniav, thiab qhov kawg ntawm lub qhov hluav taws xob, yog cov feem ntau raug mob. Cov kev tshawb fawb tau pom tias qhov hnav ntawm lub impeller tuaj yeem suav txog ze li ib nrab (38.10% - 49.41%) ntawm tag nrho cov hnav ntawm lub twj tso kua mis centrifugal. Qhov no qhia meej meej nws qhov hnyav. Qhov ntau thiab loj dua cov particles, qhov hnyav dua qhov yaig.
2. "Internal Injury" Attack of Cavitation Phenomenon
"Cavitation" yog ib lo lus uas suab zoo heev, tab sis nws tsis yooj yim to taub. Thaum lub siab ntawm lub twj tso kua mis qis dhau lawm, cov kua yuav "boil" nyob rau hauv qhov qis - qhov siab ntawm lub impeller, ua rau muaj ntau cov npuas me me. Raws li cov npuas no taug kev nrog cov kua mus rau qhov siab - thaj chaw siab, lawv yuav tawg tam sim ntawd thiab tawg, ua rau muaj zog poob siab tsis muaj zog thiab qhov kub thiab txias hauv cheeb tsam. Lub zog no zoo li suav tsis txheeb cov rauj me me rov ua rau lub ntsej muag ntawm lub impeller, ua rau qaug zog thiab flaking ntawm cov khoom, tsim honeycomb-zoo li pits. Qhov "kev raug mob sab hauv" yog ib qho nyuaj los tiv thaiv thiab tshwj xeeb tshaj yog tshwm sim ntawm tus Tsov tus tw ntawm cov hniav.
3. "Inherent Deficiencies" hauv Kev Xaiv thiab Kev Ua Haujlwm
Qee zaum, qhov teeb meem tau tshwm sim txij thaum pib. Piv txwv li, xaiv lub twj tso kua mis nrog kev sib hloov ceev heev kom ua tiav lub taub hau siab, los yog qhov tseeb txaus txaus thiab siab nyob rau hauv kev ua hauj lwm mob deviating ho los ntawm lub twj tso kua mis qhov pom efficiency point. Nws zoo li hais kom tus sprinter khiav lub marathon - lub twj tso kua mis ua haujlwm ntev nyob rau hauv tsis yog - tsim cov xwm txheej, ua rau cov hydraulic ntws los hauv lub cev tsis zoo, tsim cov vortices thiab siab pulsations, uas yuav ua rau kom hnyav hnyav thiab qaug zog ntawm lub impeller.
Thaum peb nkag siab qhov laj thawj, peb tuaj yeem ua cov phiaj xwm. Peb lub tswv yim nram qab no, xws li los ntawm theem pib mus rau kev txiav -ntug, yuav pom tseeb ib qho uas haum rau koj.
Kauj Ruam 1: Ua "tus kheej- kev tshuaj xyuas" tsis tu ncua los tiv thaiv teeb meem ua ntej lawv tshwm sim.
Txawm hais tias tam sim no tsis muaj qhov yuav tsum tau saib xyuas tus qauv tshwj xeeb rau kev hnav ntawm impellers ntawm mining lossis industrial multi-stage centrifugal twj nyob rau hauv lub teb chaws (raws li kev tshuaj xyuas ntawm cov ntaub ntawv tsim nyog), cov kev coj ua zoo tshaj plaws hauv kev lag luam twb tau tsim zoo.
Kev ua haujlwm kom zoo: Sim ua kom lub twj tso kua mis ua haujlwm nyob rau hauv nws qhov tsim kom muaj txiaj ntsig zoo, zam kev ntev - lub sij hawm siab - ntws los yog qis - ntws.
Kev saib xyuas tsis tu ncua: Tsim cov ntaub ntawv khoom siv thiab ua cov kev tshuaj xyuas tsis tu ncua ntawm lub twj tso kua mis kev co, kev coj tus kheej kub thiab kev ua haujlwm tam sim no. Cov kev hloov pauv txawv txav hauv cov ntaub ntawv no feem ntau yog qhov taw qhia ntxov ntawm kev hnav ntawm lub impeller.
Kev tswj nruab nrab: Yog tias muaj kev tso cai, ntxiv cov cuab yeej lim ua ntej lub twj tso kua mis kom txo tau cov khoom uas nkag mus rau hauv lub twj tso kua mis lub cev ntawm qhov chaw.
Kauj ruam 2: Muab tso rau ntawm "Golden Shield", txhim khu kev tiv thaiv hardcore.
Yog tias koj qhov chaw ua haujlwm hnyav hnyav heev thiab qhov hnav tsis zoo, ces koj yuav tsum xav txog kev muab lub impeller kho "nyuaj". Kev npaj ib txheej ntawm siab -kev ua tau zoo hnav- tiv thaiv txheej ntawm qhov ntws ntws ntawm lub impeller yog tam sim no tus nqi tsis tshua muaj nqi- siv tau zoo.
Cov kev xaiv tseem ceeb: Tam sim no, cov khoom siv tseem ceeb- cov thev naus laus zis thev naus laus zis hauv kev lag luam feem ntau suav nrog cov txheej txheem ceramic thiab tungsten carbide txheej. Ob leeg muaj cov hardness siab heev thiab zoo heev hnav thiab corrosion kuj zog. Tom qab daim ntawv thov, lawv tuaj yeem txuas lub neej kev pabcuam ntawm lub impeller los ntawm ob peb zaug.
Kev sib piv kev ua tau zoo: Lub hardness ntawm tungsten carbide txheej (Hv ≈ 700) yog siab dua me ntsis ntawm cov ceramic txheej (Hv ≈ 680), thiab nws ua tau zoo dua hauv kev tiv thaiv kev cuam tshuam thiab hnav tsis kam. Ob qho khoom siv kho mob tuaj yeem ua rau muaj kev pab cuam lub neej ntawm 6-8 xyoo.
Cov txiaj ntsig tiag tiag: Qhov no tsis yog kev sib tham theoretical xwb. Piv txwv li, nyob rau hauv daim ntawv thov ntawm oilfield txhaj twj tso kua mis, tom qab txheej lub impellers thiab lwm yam Cheebtsam nrog hnav- resistant coatings, qhov nruab nrab efficiency ntawm lub twj tso kua mis nce los ntawm 2.28 feem pua ​​cov ntsiab lus. Qhov no ua rau muaj kev txuag nyiaj ntau hauv cov nqi hluav taws xob txhua xyoo, nrog rau qhov zoo tshaj plaws rov qab los ntawm kev nqis peev. Qhov no tsis tsuas yog ncua lub neej, tab sis nws kuj pab koj txuag nyiaj tiag tiag.
Hauv kev xaus, kev hnav ntawm lub impeller ntawm ntau-theem centrifugal twj tso kua mis yog ib qho teeb meem uas yuav tsum tau ua kom tiav los ntawm "kev kuaj xyuas qhov ua rau" mus rau "kev kho ntau yam". Tsuas yog hloov lub impeller yuav tsis tawg lub voj voog ntawm kev ua tsis tiav.