Ukukhupha iPompo: Ithiyori kunye nokubala
Isishwankathelo sento ye-cavitation
Uxinzelelo lokufuma kolwelo luxinzelelo lokufuma kolwelo (uxinzelelo lomphunga ogcweleyo). Uxinzelelo lokufuma kolwelo lunxulumene nobushushu. Okukhona ubushushu buphezulu, kokukhona uxinzelelo lokufuma lukhulu. Uxinzelelo lokufuma kwamanzi acocekileyo kubushushu begumbi obuyi-20℃ yi-233.8Pa. Ngelixa uxinzelelo lokufuma kwamanzi kwi-100℃ luyi-101296Pa. Ke ngoko, amanzi acocekileyo kubushushu begumbi (20℃) aqala ukufuma xa uxinzelelo luhla luye kwi-233.8Pa.
Xa uxinzelelo lolwelo luncitshisiwe luye kuxinzelelo lokufuma kubushushu obuthile, ulwelo luya kuvelisa amaqamza, okubizwa ngokuba yi-cavitation. Nangona kunjalo, umphunga okwiqamza awungomphunga ngokupheleleyo, kodwa ukwanayo negesi (ngokuyintloko umoya) ngendlela yokunyibilika okanye i-nucleus.
Xa amaqamza enziwa ngexesha lokuqunjelwa angena kuxinzelelo oluphezulu, umthamo wawo uyancipha kwaye ude uqhume. Le nto yokuba amaqamza anyamalale kulwelo ngenxa yokunyuka koxinzelelo ibizwa ngokuba yi-cavitation collapse.
Ingxaki ye-cavitation kwipompo
Xa ipompo isebenza, ukuba indawo yendawo yenxalenye yayo yokugcwala (ngesiqhelo kwindawo ethile ngasemva kokungena kweblade ye-impeller). Ngesizathu esithile, xa uxinzelelo olupheleleyo lolwelo olupompelweyo luhla luye kuxinzelelo lokufuma kubushushu bangoku, ulwelo luqala ukufuma apho, luvelise umphunga kwaye lwenze amaqamza. La maqamza ahamba phambili nolwelo, kwaye xa efikelela kuxinzelelo oluthile oluphezulu, ulwelo oluphezulu olujikeleze amaqamza lunyanzela amaqamza ukuba anciphe ngokukhawuleza aze aqhume. Xa iqamza liqhuma, amaqhekeza olwelo aza kuzalisa umngxuma ngesantya esiphezulu aze angqubane ukuze enze ihamile yamanzi. Le nto iya kubangela umonakalo wokugqwala kwiindawo ezisebenzisa umbane omninzi xa kwenzeka eludongeni oluqinileyo.
Le nkqubo yinkqubo yokufunxa ipompo.
Impembelelo ye-cavitation yepompo
Velisa ingxolo kunye nokungcangcazela
Umonakalo wokugqwala kwezinto ezisebenza ngokugqithisileyo
Ukuwohloka kokusebenza
I-equation esisiseko ye-cavitation yepompo
Isibonelelo se-NPSHr-Pump cavitation sikwabizwa ngokuba yi-necessary cavitation allowance, kwaye sibizwa ngokuba yi-necessary net positive head abroad.
I-NPSHa-Isibonelelo sokucavitation sesixhobo sikwabizwa ngokuba sisibonelelo sokucavitation esisebenzayo, esibonelelwa sisixhobo sokufunxa. Okukhona i-NPSHA inkulu, kokukhona amathuba okuba ipompo icavitation anciphe. I-NPSHa iyancipha ngokwanda kwezithuthi.
Ubudlelwane phakathi kwe-NPSha kunye ne-NPSHr xa uguquko lomoya lutshintsha
Indlela yokubala i-cavitation yesixhobo
hg=Pc/ρg－hc－Pv/ρg－[NPSH]
[NPSH]-Isibonelelo sokucavitation esivumelekileyo
[NPSH] = (1.1 ~ 1.5) NPSHr
Xa isantya sokuhamba kwamanzi sikhulu, thatha ixabiso elikhulu, kwaye xa isantya sokuhamba kwamanzi sincinci, thatha ixabiso elincinci.
Ixesha leposi: Jan-22-2024