Uma kukhona i-cavitation yamaphampu e-centrifugal, ingabangela ukudlidliza nomsindo phakathi nokusebenza kwayo kwansuku zonke, ngezinye izikhathi kungase kudingeke siyeke ukusebenza.Ngakho-ke sidinga ukuthola ukuthi yiziphi izizathu ezizoholela ku-cavitation yamaphampu e-centrifugal, khona-ke singagwema le mibuzo ukuthi yenzeke ngobuhlakani kakhulu.
I-cavitation yamaphampu angu-centrifugal, noma i-cavitation, inqubo yokugeleza kwamabhamuza oketshezi bese iyaqhuma.Lapho ijubane eliphelele lokugeleza koketshezi likhuphuka, njengoba ingcindezi emile yokugeleza koketshezi iyancipha, ngezinhlayiyana ezithile ezingeni lokushisa elithile loketshezi, nakuba kungekho ukushisa okuvela okokufaka kwangaphandle, kodwa baye bafinyelela ukucindezela komhwamuko, ukuze izinhlayiya zibe vaporization. , futhi ibhamuza lakhiqizwa.Endleleni yokugeleza.

Uma ukucindezela okumile koketshezi kuzophinde kwandiswe, kuphakeme kunokucindezela komhwamuko, ibhamuza lizoqhuma ngokushesha okukhulu.Ingxenye enkulu yomthelela we-condensation implosion.Uma i-bubble iqhuma lapho ingekho ekugelezeni koketshezi, kodwa odongeni lwezingxenye zomhlangano womhlahlandlela, i-cavitation izoholela ezingxenyeni ezimanzi ezingaphansi kokuguguleka.

Lapho ipompo ye-centrifugal isebenza esimweni se-cavitation, ngisho noma kungekho ukuguguleka kwezingxenye ezimanzi, ungathola futhi ukuthi ngalesi sikhathi umsindo wepompo ye-centrifugal mkhulu kakhulu, ukudlidliza kuyaqina, ukusebenza kahle kuyancipha, futhi ikhanda lizoba phansi kakhulu ngokufanele. .

Imishini NPSHa , ebizwa nangokuthi i-NPSH esebenzayo.Izinto ezisetshenziswayo zinikezwa okokusebenza okumunca, endaweni yokumunca yephampu ye-centrifugal, isisindo seyunithi yoketshezi sibe namandla asele ngaphezu komfutho we-vaporization kanye nekhanda.Phesheya kwezilwandle biza lokhu ngekhanda lokumunca elinetha eliphozithivu elisebenzayo, Leyo payipi yokungena (indawo yekhanda inguziro) enekhanda eligcwele lomfutho we-liquid minus vaporization kanye nengqikithi yenani eliyinsalela, elimelwe yi-NPSha.Inani layo namapharamitha ahlobene nezakhiwo eziwuketshezi.Ngoba idivayisi yokuhogela ilingana nesikwele sokugeleza nokulahleka kwe-hydraulic.Ngakho-ke i-NPSH yehla ngokunyuka komthamo.I-NPSH-Q iyijika elinciphayo.I-NPSH inobudlelwano nesimo sokugeleza kwamaphampu, bekuyibhalansi yokwehla kwengcindezi ye-pump inlet enqunywe yipompo ye-centrifugal ngokwayo.Okusho ukuthi, ukuze sigweme i-cavitation yepompo, sidinga ukuthi kube namandla engeziwe angadlula ikhanda lokucindezela komhwamuko endaweni yokungena yepompo.Phesheya kwezilwandle biza lokhu ngekhanda lokumunca elinetha elihle.Incazelo engokoqobo yepompo ye-NPSH ibonisa izinga lokwehla kwengcindezi yokungena kwepompo yoketshezi.Okuthiwa net positive ukuncela inhloko edingekayo, Kuwukudinga idivayisi inhalation kumele inikezwe net enkulu kangaka ukuncela inhloko, ukuze isinxephezelo amaconsi ingcindezi, ukuqinisekisa ukuthi cavitation futha akwenzeki.

I-NPSH yephampu ye-multistage centrifugal ayinabo ubudlelwano namapharamitha wemishini.Okuhlobene kuphela namapharamitha anyakazayo endaweni yokupompa.Amapharamitha okunyakaza ngesivinini esithile kanye namapharamitha okugeleza anqunywa ijometri.Okusho ukuthi, i-NPSH inqunywa iphampu ngokwayo.Ngepompo enikeziwe, kungakhathaliseki ukuthi uketshezi luni, Ngesivinini esithile futhi igeleza nge-pump inlet, ngakho-ke, ngenxa yesivinini esifanayo ukuze babe nokwehla kwengcindezi efanayo, i-NPSHr efanayo.Ngakho-ke i-NPSHr ayinabo ubudlelwano nezakhiwo eziwuketshezi.I-NPSH incane, ingcindezi incane,

I-Ti idinga ukuthi imishini kumele inikeze i-NPSha encane, bese kuba ukumelana okungcono kwe-cavitation yepompo.