Lub tswvyim ntawm impeller:
Lub impeller yog hais txog ob lub disc nrog cov hniav txav, uas yog ib feem ntawm lub impulse turbine rotor, thiab cov ntsiab lus dav dav rau cov disc thiab cov hniav tig ntsia rau ntawm nws. Cov impellers feem ntau yog cam khwb cia lossis welded, thiab cov khoom raug xaiv raws li qhov nruab nrab ua haujlwm.
Lub luag haujlwm tseem ceeb:
Lub impeller hloov lub zog txhua yam ntawm tus thawj txav mus rau qhov zoo li qub thiab lub zog siab ntawm cov kua ua haujlwm.
Kev faib tawm
Raws li daim ntawv hniav, nws tuaj yeem muab faib ua peb hom:qhib impeller, kaw impeller, thiabsemi qhib impeller.
Lub impeller kaw muaj lub hau npog pem hauv ntej thiab nram qab daim hlau thiab cov hniav;
Lub semi qhib impeller muaj cov hniav thiab lub hau npog phaj;
Qhib impellers tsuas yog muaj cov hniav thiab ib nrab ntawm cov phaj npog sab nraub qaum lossis tsis muaj phaj npog sab nraub qaum.
Lub semi qhib thiab qhib impellers nyob rau hauv cov hniav hom impellers yog ib qho yooj yim mus cam khwb cia thiab muaj peev xwm thauj cov xov xwm uas muaj tej yam khoom hais. Txawm li cas los xij, vim qhov kev yaig ntawm cov dej ntws los ntawm cov khoom siv, kev ua haujlwm ntawm lub twj tso kua mis yuav raug txo.
Kaw impellers muaj kev ua haujlwm siab thiab tuaj yeem ua haujlwm zoo rau lub sijhawm ntev. Lub axial thrust ntawm lub twj tso kua mis me me, tab sis kaw impellers tsis yooj yim rau kev thauj cov dej phwj tuaj uas muaj cov khoom loj lossis cov fibers ntev.
Raws li kev ua haujlwm hom, nws tau muab faib ua ib qho suction impeller thiab ob chav suction impeller.
Ib qho suction impeller yog hais txog lub impeller nqus cov kua los ntawm ib sab.
Ob chav suction impeller yog hais txog lub impeller uas nqus cov kua los ntawm ob sab thiab muaj kev ua haujlwm zoo tiv thaiv cavitation.
Raws li cov qauv, muaj plaub hom: channel hom (ib channel, ob chav channel), hom hniav (kaw, qhib), kauv hom centrifugal, thiab hom swirl.
1. Flow channel impeller:
Lub ndlwg channel impeller yog ib tug nkhaus ntws channel los ntawm lub inlet mus rau lub qhov hluav taws xob, uas yog haum rau conveying kua uas muaj ib tug loj particle impurities los yog ntev fibers. Vim tias hom impeller no muaj kev tiv thaiv zoo heev. Tab sis nws qhov tsis zoo yog tias nws cov kev ua haujlwm tiv thaiv cavitation tsis muaj zog dua li lwm cov ntaub ntawv.
2. Hniav hom impeller:
Lub semi qhib thiab qhib impellers nyob rau hauv cov hniav hom impellers yog ib qho yooj yim rau cam khwb cia thiab tuav, raws li zoo raws li huv impurities uas yuav clog thaum lub sij hawm kev thauj mus los. Txawm li cas los xij, nws qhov tsis zoo nyob hauv qhov sib txawv ntawm cov phab ntsa sab hauv ntawm lub tshuab nqus dej siab thiab cov hniav vim yog kev yaig ntawm cov khoom siv thaum lub sijhawm thauj mus los, uas txo cov kev ua haujlwm ntawm lub twj tso kua mis. Ntxiv mus, qhov sib txawv nce ntxiv cuam tshuam qhov kev ruaj ntseg ntawm cov kua dej hauv cov channel, ua rau lub twj tso kua mis vibrate. Hom impeller no tsis yooj yim rau kev thauj cov xov xwm uas muaj cov khoom loj thiab cov fibers ntev. Lub impeller kaw tau muaj kev ua haujlwm siab thiab tuaj yeem ua haujlwm tau zoo rau lub sijhawm ntev. Lub axial thrust ntawm lub twj tso kua mis yog me me, tab sis lub impeller nyob rau hauv lub impeller yog nquag mus entanglement thiab nyuaj rau thauj cov dej phwj tawm uas muaj cov khoom loj los yog ntev fibers.
3. Kauv centrifugal impeller:
Kauv centrifugal impeller muaj twisted hniav thiab txuas axially los ntawm qhov chaw nres nkoj suction ntawm lub conical hub lub cev. Thaum cov kua raug thauj los ntawm cov hniav, nws tsis sib tsoo nrog ib feem ntawm lub twj tso kua mis, yog li tsis muaj kev puas tsuaj rau lub twj tso kua mis. Nyob rau tib lub sijhawm, tsis muaj kev puas tsuaj rau cov kua uas raug thauj. Vim cov nyhuv propulsion ntawm cov kauv, qhov kev tso tawm ntawm cov khoom raug tshem tawm muaj zog. Yog li ntawd, lub twj tso kua mis siv hom impeller no haum rau kev siv cov khoom siv uas muaj cov khoom loj thiab cov fibers ntev.
4. Swirl impeller:
Lub viav vias hom impeller muaj tag nrho lossis ib feem ntawm lub impeller retracted rau hauv lub siab chamber flow channel, thiab muaj kev ua haujlwm zoo los tiv thaiv txhaws. Cov khoom ntws nyob rau hauv cov dej siab chamber thiab yog propelled los ntawm lub vortex generated los ntawm kev sib hloov ntawm lub impeller. Cov khoom raug tshem tawm lawv tus kheej tsis tsim lub zog, tab sis pauv lub zog nrog cov kua hauv cov dej ntws. Thaum cov txheej txheem ntws, cov khoom raug tshem tawm lossis cov fibers ntev tsis tuaj yeem ntsib nrog cov hniav hnav. Qhov xwm txheej ntawm cov hniav siv ntau dhau yog qhov me me, thiab tsis muaj qhov sib txawv ntxiv vim kev puas tsuaj. Nws yog qhov tsim nyog rau kev siv cov xov xwm uas muaj cov khoom loj thiab cov fibers ntev.
Main geometric parameters
Dj: Inlet txoj kab uas hla ntawm impeller;
D1: Hniav inlet txoj kab uas hla;
Dh: impeller hub txoj kab uas hla;
B1: Nplooj inlet dav;
1: Nplooj inlet kaum sab xis;
D2: Sab nraud ntawm impeller;
B2: Dav ntawm impeller qhov hluav taws xob;
2: Nplooj tawm kaum sab xis;
Φ: hniav qhwv lub kaum sab xis;
Z: Tus naj npawb ntawm nplooj.
Cov kev ntsuas geometric ntawm lub impeller inlet muaj qhov cuam tshuam loj rau kev ua haujlwm cavitation, thaum lub geometric tsis ntawm impeller qhov hluav taws xob muaj qhov cuam tshuam loj rau kev ua tau zoo (H, Q), ob qho tib si muaj kev cuam tshuam rau lub twj tso kua mis efficiency.
6 tej teeb meem thiab kev daws teeb meem rau impellers
1, Casting defects
1. Fault manifestation: inclusions nyob rau hauv lub ntws channel; Succulent; Tsis du; trachoma; crackle; Shrinkage thiab looseness, thiab lwm yam.
2. Txoj kev kho mob: sib tsoo, vuam thiab lwm txoj kev tuaj yeem ua raws li qhov xwm txheej tiag tiag. Yog tias qhov teeb meem loj heev, nws yuav tsum tau muab pov tseg thiab rov ua dua.
2, Abrasion thiab abrasion
1. Kev ua haujlwm tsis raug: Daim duab qhia txog kev puas tsuaj ntawm cov txheej txheem twj tso kua mis impeller nrum los ntawm grey cam khwb cia hlau los ntawm cov dej uas muaj me me ntawm cov cement ua npuas dej hauv tsib xyoos. Qhov teeb meem puas yog ntau dua los ntawm tus tsim qauv xaiv cov khoom siv lossis hom twj tso kua mis, lossis cov txheej txheem nruab nrab yog qias neeg.
2. Kev daws: Hloov cov khoom siv impeller; Hloov cov qauv tsim thiab hloov cov twj tso kua mis; Xyuas cov txheej txheem nruab nrab.
3, Cavitation
1. Kev ua txhaum cai: Cov qauv tsim tsis raug; Lub installation txoj hauj lwm siab dhau lawm; Kev xaiv tsis raug ntawm cov khoom siv, thiab lwm yam.
2. Kev daws teeb meem: txo qis txoj haujlwm teeb tsa; Hloov cov ntaub ntawv uas tiv taus ntau dua rau cavitation; Redesign lub twj tso kua mis, thiab lwm yam.
4, Lub qhov ncauj nplhaib xauv
1. Fault manifestation: Tus tsim clearance yog me heev; Lub hardness sib txawv ntawm lub hauv ntej thiab nram qab lub qhov ncauj rings yog tsawg tshaj li 50HBW; Muaj cov khoom sib txawv hauv qhov sib txawv ntawm lub qhov ncauj rings; Deformation ntawm lub qhov ncauj nplhaib, thiab lwm yam.
2. Kev daws: Ua kom qhov sib txawv tsim; Hloov cov khoom ntawm lub qhov ncauj nplhaib; Xyuas cov txheej txheem nruab nrab; Hloov nrog lub nplhaib lub qhov ncauj tshiab, thiab lwm yam.
5, Kev tawg
1. Fault manifestation: tshwm sim los ntawm cavitation, corrosion, thiab puas; Tsis zoo ntawm castings ua rau; Ua los ntawm dej rauj.
2. Kev daws: Hloov lub impeller nrog ib qho tshiab.
6, Corrosion
1. Kev ua txhaum cai: xaiv cov khoom siv tsis raug.
2. Kev daws: Hloov lub impeller nrog ib qho tshiab thiab siv cov khoom siv corrosion-resistant thiab hnav-resistant; Txheej ntawm corrosion-resistant txheej ntawm impeller; Txau txheej ntawm corrosion-resistant txheej ntawm impeller.