Ukuba kukho i-cavitation yeepompo ze-centrifugal, inokubangela ukungcangcazela kunye nengxolo ngexesha lokusebenza kwayo yonke imihla, ngamanye amaxesha sinokuyeka ukusebenza.Ngoko kufuneka sifumane ukuba zeziphi izizathu eziya kukhokelela kwi-cavitation yeepompo ze-centrifugal, ngoko sinokuyiphepha le mibuzo ukuba ivele ngobuchule.
I-cavitation yeepompo ze-centrifugal, okanye i-cavitation, yinkqubo yokugeleza kwamaqamza olwelo kwaye emva koko agqabhuke.Xa isantya ngokupheleleyo flow ulwelo ukwanda, njengoko uxinzelelo static lokuhamba ulwelo kuncipha, ngenxa isuntswana elithile kwiqondo lobushushu elithile ulwelo, nangona akukho bushushu ukusuka igalelo lwangaphandle, kodwa baye bafikelela kuxinzelelo lomphunga, ukuze amasuntswana umphunga. , kunye neqamza lenziwe.Ecaleni kwendlela yokuhamba.

Ukuba uxinzelelo lwe-static lolwelo luya kwandiswa kwakhona, ngaphezu koxinzelelo lomphunga, i-bubble iya kuqhuma ngokukhawuleza.Inxalenye enkulu yempembelelo ye-condensation implosion.Ukuba i-bubble yaqhuma xa ingekho ekuhambeni kolwelo, kodwa eludongeni lweendawo zendibano yesikhokelo, i-cavitation iya kukhokelela kwiindawo ezimanzi eziphantsi kokhukuliseko.

Xa impompo ye-centrifugal isebenza kwimeko ye-cavitation, nokuba akukho ndawo zimanzi, unokufumanisa ukuba ngeli xesha ingxolo yempompo ye-centrifugal inkulu kakhulu, i-vibration iqinisa, iyancipha ukusebenza kakuhle, kwaye intloko iya kuba phantsi kakhulu ngokufanelekileyo. .

Isixhobo NPSHa , ikwabizwa ngokuba yiNPSH esebenzayo.Izixhobo zibonelelwa ngezixhobo zokufunxa, kwindawo yokufunxa yempompo ye-centrifugal, ubunzima beyunithi yolwelo lube namandla angaphezulu kunoxinzelelo lokuphefumla kunye nentloko.Phesheya kolwandle biza oku ngenetha esebenzayo yokufunxa intloko, Loo nto yokufunxa impompo (indawo yentloko ingu-zero) enentloko epheleleyo yolwelo thabatha uxinzelelo lomphunga kunye nentsalela yexabiso lentsalela, emelwe yi-NPSha.Ixabiso layo kunye neeparamitha ezinxulumene neempawu zolwelo.Ngenxa yokuba isixhobo sokuphefumla silingana nesikwere sokuhamba kunye nokulahleka kwe-hydraulic.Ke i-NPSH iyancipha ngokunyuka kwamandla.I-NPSH-Q ligophe elihlayo.I-NPSH inobudlelwane kunye nemeko yokuhamba kweempompo, yayiyi-balance pump inlet yoxinzelelo loxinzelelo olugqitywe yimpompo ye-centrifugal ngokwayo.Oko kukuthi, ukuze sigweme i-cavitation yempompo, sifuna ukuba kukho amandla angaphezulu anokugqithisa intloko yoxinzelelo lomphunga kwi-inlet yempompo.Ngaphesheya kolwandle biza oku ngokuba yintloko yokufunxa efunekayo.Intsingiselo ebonakalayo yempompo ye-NPSH ibonisa iqondo lokuhla koxinzelelo lwempompo yolwelo.Okubizwa ngokuba yi-net positive suction head efunekayo, Kukufuna isixhobo sokuphefumla kufuneka sinikezelwe ngentloko enje ngenetha entle, ukwenzela ukuhlawulela amathontsi oxinzelelo, ukuqinisekisa ukuba i-cavitation yempompo ayenzeki.

I-NPSH yempompo ye-multistage centrifugal ayinabudlelwane kunye neeparamitha zezixhobo.Inxulumene kuphela neeparamitha ezishukumayo kwindawo yokungena impompo.Iiparamitha ezishukumayo kwisantya esithile kunye neeparitha zokuhamba zigqitywa yijometri.Oko kukuthi, i-NPSH imiselwe yimpompo ngokwayo.Kwimpompo enikiweyo, kungakhathaliseki ukuba yintoni ulwelo, Ngesantya esithile kunye nokuhamba nge-inlet yempompo, ngoko ke, ngenxa yesantya esifanayo ukuze babe nokuhla koxinzelelo olufanayo, i-NPSHr efanayo.Ke i-NPSHr ayinabudlelwane kunye neempawu zolwelo.I-NPSH encinci, incinci uxinzelelo,

I-Ti idinga izixhobo kufuneka zinikeze i-NPSha encinci, kwaye ke ukuchasana okungcono kwempompo ye-cavitation.