Vim li cas peb siv centrifugal twj tso kua mis es tsis txhob reciprocating twj?
Centrifugal twj thiab cov twj reciprocating yog ob hom twj nrov uas tau siv dav hauv ntau yam lag luam. Ob lub twj tso kua mis no yog tsim los hloov cov kua dej los ntawm ib qho chaw mus rau lwm qhov, tab sis lawv ua haujlwm ntawm cov qauv sib txawv thiab muaj kev siv sib txawv. Hauv tsab xov xwm no, kuv yuav tham txog cov laj thawj vim li cas cov twj centrifugal nyiam dua cov twj tso kua mis hauv ntau zaus.
Nkag siab txog Centrifugal Pumps
Cov twj centrifugal yog cov tshuab siv hluav taws xob uas siv lub zog centrifugal los tsim lub siab thiab txav cov kua dej. Lub twj tso kua mis muaj lub impeller uas tig ntawm kev kub ceev hauv lub casing. Thaum lub impeller rotates, cov kua nkag mus rau hauv lub twj tso kua mis los ntawm lub suction inlet thiab yog accelerated los ntawm lub centrifugal quab yuam generated los ntawm rotating impeller. Qhov no acceleration imparts kinetic zog rau cov kua, uas yog ces hloov mus rau hauv siab zog raws li cov kua tawm hauv lub twj tso kua mis los ntawm lub qhov hluav taws xob tawm.
Cov twj centrifugal paub txog lawv lub peev xwm los tuav cov kua dej ntau ntawm qhov tsis tshua muaj siab. Lawv feem ntau siv rau hauv cov ntawv thov uas qhov kev khiav dej num yog qhov tseem ceeb tshaj qhov siab, xws li hauv cov kav dej, cov kav dej, thiab HVAC systems.
Qhov zoo ntawm Centrifugal Pumps
Muaj ntau qhov zoo ntawm kev siv cov twj centrifugal tshaj cov twj reciprocating:
1. Siab dua tus nqi:Cov twj centrifugal muaj peev xwm tuav tau ntau qhov dej ntws loj dua piv rau cov twj reciprocating. Qhov no yog vim hais tias cov twj centrifugal siv cov txheej txheem ntws mus tas li, thaum lub twj tso kua mis reciprocating ua haujlwm hauv cov txheej txheem pulsating ntws. Cov txheej txheem nruam ntws ntawm cov twj centrifugal tso cai rau kev hloov pauv ntawm cov kua dej ntau dua, uas ua rau cov nqi ntws ntau dua.
2. Kev saib xyuas qis dua:Cov twj centrifugal muaj cov qauv yooj yim dua thiab tsawg dua qhov txav mus los piv rau cov twj reciprocating. Qhov no ua rau lawv yooj yim rau kev tswj hwm thiab txo cov kev pheej hmoo ntawm kev ua haujlwm tsis zoo. Tsis tas li ntawd, txij li tsis muaj cov li qub los hnav lossis hloov hauv cov twj centrifugal, cov nqi tu feem ntau qis dua.
3. Tsawg vibration thiab suab nrov:Cov twj centrifugal ua haujlwm ntawm qhov nrawm dua piv rau cov twj reciprocating, uas ua rau kev ua haujlwm zoo dua thiab ntsiag to. Reciprocating twj, ntawm qhov tod tes, tsim ntau kev co thiab suab nrov vim cov txheej txheem pulsating ntws thiab reciprocating motion ntawm pistons los yog diaphragms.
4. Muaj peev xwm tuav cov khoom loj dua:Cov twj centrifugal yog qhov tsim nyog rau kev siv cov kua dej uas muaj cov khoom loj dua los yog cov khoom khib nyiab. Tus tsim ntawm lub impeller tso cai rau kev nkag mus ntawm cov khoom mus txog qhov loj me yam tsis ua rau txhaws lossis puas tsuaj rau lub twj tso kua mis. Piv txwv li, cov twj reciprocating muaj cov kab me me thiab tuaj yeem yooj yim los ntawm cov khib nyiab.
5. Tsawg tus nqi installation:Cov twj centrifugal feem ntau tsis tshua kim rau nruab piv rau cov twj reciprocating. Qhov no yog vim cov twj centrifugal xav tau qhov chaw tsawg dua, cov khoom siv tsawg dua, thiab cov kav dej yooj yim dua. Reciprocating twj, ntawm qhov tod tes, xav tau qhov chaw ntau dua vim qhov kev sib txuas lus, thiab lawv cov kev teeb tsa tuaj yeem ua ntau dua.
Kev txwv ntawm Centrifugal Pumps
Thaum cov twj centrifugal muaj ntau qhov zoo, lawv kuj muaj qee qhov kev txwv uas yuav tsum tau xav txog:
1. Txwv tsis pub muaj peev xwm:Cov twj centrifugal tsis haum rau cov ntawv thov uas xav tau kev tso tawm siab. Qhov siab tshaj plaws uas tuaj yeem ua tiav los ntawm lub twj tso kua mis centrifugal feem ntau txwv rau ob peb puas taw ntawm lub taub hau, thaum cov twj tso kua mis reciprocating tuaj yeem ua kom muaj zog ntau dua.
2. Inefficient ntawm low flow rate:Cov twj tso kua mis centrifugal tsis tshua muaj txiaj ntsig ntawm tus nqi qis qis piv rau cov twj tso kua mis reciprocating. Qhov no yog vim hais tias lub zog centrifugal generated los ntawm lub impeller yog ncaj qha proportional rau lub square ntawm lub impeller ceev. Thaum qis qis, lub zog centrifugal tsis txaus los ua kom cov kua dej ua tau zoo, ua rau qis qis thiab ua haujlwm tsis zoo.
3. Poor self-priming peev xwm:Cov twj centrifugal xav kom cov kab nqus dej kom puv ua ntej lawv tuaj yeem ua haujlwm tau zoo. Yog tias cov kab nqus dej ua rau khoob vim qhov poob ntawm qhov tseem ceeb lossis huab cua nkag mus, lub twj tso kua mis yuav tsis pib lossis xa cov dej ntws tawm. Reciprocating twj, ntawm qhov tod tes, yog qhov zoo dua ntawm tus kheej-priming thiab tuaj yeem ua tau zoo rau cov xwm txheej uas cov kab suction yuav tsum tau primed.
4. Tsawg viscosity ntau yam:Cov twj centrifugal feem ntau tsis haum rau kev nqus cov kua dej ntau. Lub viscosity ntawm cov kua cuam tshuam rau kev ua haujlwm thiab kev ua haujlwm ntawm lub twj tso kua mis. Thaum muaj viscosities siab, lub twj tso kua mis tuaj yeem ua rau muaj kev sib txhuam ntau ntxiv thiab txo qis ntws. Cov twj tso kua mis reciprocating, nrog rau lawv qhov kev hloov pauv zoo, yog qhov zoo dua rau kev siv cov kua dej khov.
Xaus
Hauv cov ntsiab lus, cov twj centrifugal nyiam dua cov twj reciprocating hauv ntau daim ntawv thov vim lawv cov nqi ntws ntau dua, kev saib xyuas qis dua, kev ua haujlwm zoo dua, muaj peev xwm tswj cov khoom loj dua, thiab cov nqi qis dua. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum xav txog cov kev txwv ntawm cov twj tso kua mis centrifugal, xws li lawv lub peev xwm tsis tshua muaj peev xwm, tsis muaj peev xwm ntawm tus nqi qis, muaj peev xwm ua rau tus kheej tsis zoo, thiab cov viscosity tsawg. Los ntawm kev nkag siab txog cov yam ntxwv thiab qhov sib txawv ntawm ob hom twj tso kua mis, engineers thiab cov neeg ua haujlwm tuaj yeem xaiv lub twj tso kua mis uas tsim nyog tshaj plaws rau lawv daim ntawv thov tshwj xeeb.