Lub impeller yog qhov tseem ceeb ntawm lub twj tso kua mis centrifugal, uas yog tsim los ntawm ob peb cov hniav nkhaus. Lub luag haujlwm ntawm lub impeller yog txav lub prime mover. Lub tshuab hluav taws xob ntawm lub tshuab yog ncaj qha mus rau cov kua los txhim kho lub zog zoo li qub thiab lub zog dynamic siab ntawm cov kua (tsuas yog txhim kho lub zog zoo li qub). Lub impeller yog ib qho khoom siv hluav taws xob.
Raws li nws cov qauv siv tshuab, nws tuaj yeem muab faib ua cov impeller kaw, ib nrab kaw impeller, thiab qhib impeller. Cov impellers yuav tsum tau siv rau kev xa dej huv, vim tias lawv cov kev ua haujlwm siab, lub twj tso kua mis centrifugal feem ntau siv ntau theem centrifugal twj tso kua mis; Semi-kaw impeller yog tsim rau conveying cov ntaub ntawv uas yooj yim rau precipitate los yog me ntsis muaj hais, thiab nws efficiency yog tsawg tshaj li ntawm kaw impeller; Qhov qhib impeller yog tsim rau kev xa cov khoom uas muaj cov khib nyiab ntxiv. Nws efficiency yog tsawg thiab lub siab ntawm conveying kua tsis siab. Raws li nws hom kev nqus dej, nws tuaj yeem muab faib ua ib hom suction thiab ob hom suction. Hom suction ib leeg muaj cov qauv yooj yim, thiab cov kua yog nqus tau los ntawm ib sab xwb;
Ob chav suction qauv yog complex, thiab cov kua yog nqus los ntawm ob sab, uas muaj peev xwm nqus tau dej loj.
Raws li cov hniav zoo nkauj, nws tuaj yeem muab faib ua cov hniav rov qab-khoov, cov hniav radial, thiab rau pem hauv ntej-kho hniav, vim tias cov hniav rov qab-khoov tuaj yeem tau txais kev ua haujlwm siab dua thiab lub zog zoo li qub, yog li cov twj centrifugal feem ntau siv rov qab nkhaus hniav. Lub twj tso kua mis impeller yog tsav los tig los ntawm lub cev muaj zog; thiaj li hais tias qhov nruab nrab (dej) raug centrifugal quab yuam los yog lifting quab yuam; kom lub nruab nrab muaj txhua yam zog (kinetic zog)
Titanium yog cov hlau uas muaj zog passivation nyiam. Nws tuaj yeem ua kom ruaj khov oxidizing tiv thaiv zaj duab xis hauv huab cua thiab oxidizing lossis nruab nrab aqueous tov. Txawm hais tias cov yeeb yaj kiab puas vim qee yam, nws tuaj yeem rov qab tau sai thiab txiav. Yog li ntawd, titanium muaj zoo heev corrosion kuj nyob rau hauv oxidizing thiab nruab nrab media.
Vim tias qhov ua tau zoo ntawm kev ua haujlwm zoo ntawm titanium, ntau zaus, thaum sib cuag cov hlau tsis sib xws, nws yuav tsis nrawm rau corrosion ntawm cov hlau tsis sib xws tab sis tuaj yeem ua kom cov hlau sib txawv. Piv txwv li, nyob rau hauv qis concentration nonoxidizing acid, yog Pb, Sn, Cu, los yog Monel alloy yog hu rau titanium los tsim ib tug galvanic ob peb, corrosion ntawm cov ntaub ntawv no yog ceev, thaum titanium tsis cuam tshuam. Nyob rau hauv hydrochloric acid, thaum titanium los rau hauv kev sib cuag nrog tsawg carbon steel, lub tshiab generated hydrogen nyob rau saum npoo ntawm titanium rhuav tshem cov oxide zaj duab xis ntawm titanium, uas tsis tsuas yog ua rau lub hydrogen embrittlement ntawm titanium tab sis kuj accelerates lub corrosion ntawm titanium, uas tej zaum yuav ua rau cov oxides ntawm titanium. vim muaj kev ua haujlwm siab ntawm titanium rau hydrogen.
Cov ntsiab lus hlau hauv titanium muaj feem cuam tshuam rau kev tiv thaiv corrosion hauv qee qhov xov xwm. Ntxiv rau qhov laj thawj ntawm cov khoom siv raw, vim li cas rau qhov nce ntawm cov hlau feem ntau yog cov hlau tsis huv nkag mus rau hauv cov hlaws vuam thaum lub sij hawm vuam, uas ua rau muaj kev nce hauv cov hlau hauv zos hauv cov hlaws weld. Lub sijhawm no, qhov corrosion muaj qhov tsis sib xws. Thaum siv cov khoom siv hlau los txhawb cov khoom siv titanium, kev sib kis ntawm cov hlau titanium yuav luag tsis muaj kev tiv thaiv, thiab kev xeb tau nrawm dua hauv cov hlau tsis huv, tshwj xeeb tshaj yog thaum muaj hydrogen. Thaum cov titanium oxide zaj duab xis nyob rau ntawm qhov chaw tsis huv yog mechanically puas, hydrogen yuav nkag mus rau hauv cov hlau. Raws li qhov kub thiab txias, siab, thiab lwm yam mob, hydrogen yuav diffuse raws li, uas ua rau titanium tsim txawv degrees ntawm hydrogen embrittlement. Yog li ntawd, kev siv titanium nyob rau hauv nruab nrab kub, nruab nrab siab, thiab hydrogen-muaj tshuab yuav tsum tsis txhob deg hlau muaj kuab paug.
