I-Cavitation of Pump: Ithiyori nokubalwa
Ukubuka konke kwe-Cavitation Penomenon
Ingcindezi yohlobo lwe-vaporization yingcindezi ye-vaporization ye-liquid (umfutho we-vapor wagcwala). Ingcindezi ye-Vaporization ye-Liquid ihlobene nokushisa. Ukushisa okuphezulu, okucindezela kakhulu ingcindezi ye-vaporization. Ingcindezi ye-Vaporization yamanzi ahlanzekile ekushiseni kwegumbi lama-20 ℃ angama-233.8pa. Ngenkathi umfutho wamanzi we-vaporization wamanzi e-100 ℃ ngu-101296pa. Ngakho-ke, amanzi ahlanzekile emazingeni okushisa asekamelweni (20 ℃) aqala ukuzungeza lapho ingcindezi yehlela ku-233.8PA.
Lapho ingcindezi yoketshezi incishiswa yengcindezi ye-vaporization emazingeni okushisa athile, uketshezi luzokhiqiza ama-bubble, abizwa ngokuthi ama-cavitation. Kodwa-ke, umphunga ku-bubble empeleni awusiwona ngokuphelele umusi, kodwa futhi uqukethe igesi (ikakhulukazi umoya) ngesimo sokuchithwa noma i-nucleus.
Lapho ama-bubble akhiqizwa ngesikhathi sokugeleza kwe-cavitation agelezela ekucindezelweni okuphezulu, ivolumu yawo inciphisa futhi iqhume. Lesi simo ama-bubble anyamalala uketshezi ngenxa yokukhuphuka kwengcindezi ibizwa ngokuthi ukuwohloka kwe-cavitation.
Isimo se-cavitation ephampu
Lapho impompo isebenza, uma indawo yendawo yengxenye yayo echichima (imvamisa endaweni ethile ngemuva kwe-inleller blade). Ngasizathu simbe, lapho ingcindezi ephelele yoketshezi egcwele iwela ingcindezi ye-vaporization kumazinga okushisa amanje, uketshezi luqala ukufukula lapho, ukukhiqiza umusi nokwakha ama-bubble kanye nokwakha ama-bubble. Lawa ma-bubble aqhuma phambili noketshezi, futhi lapho efika ekucindezelweni okuthile okuphezulu, uketshezi lokucindezela oluphakeme oluzungeze ama-bubble luphoqa ama-bubble amabutho ukuze anciphe kakhulu futhi aqhume. Lapho bubble buqhuma, izinhlayiya eziwuketshezi zizogcwalisa umgodi ngejubane elikhulu bese zihlangana nomunye ukwakha isando samanzi. Le nto izodala ukulimala kokugqwala kwezakhi ezingezelelesi lapho kwenzeka odongeni oluqinile.
Le nqubo inqubo ye-Pump Vavitation.
Ithonya Lempompo
Khiqiza umsindo nokudlidliza
Ukulimala kokugqwala kwezakhi ezikhona njengamanje
Ukuwohloka kokusebenza
Ipompo ye-pump cavitation eyisisekelo i-equation
Isibonelelo semvume ye-NPSHR-PUMP sibizwa nangokuthi isibonelelo se-cavitation esidingekayo, futhi sibizwa ngokuthi yikhanda elifanelekile elifanele phesheya.
I-NPSHA-I-Cavitation SupAmentance yedivayisi ibizwa nangokuthi imvume esebenzayo ye-cavitation, enikezwe yithuluzi lokumisa. Lapho kukhudlwana i-NPSHA, okungenzeka ukuthi iphampu lizovalwa. I-NPSHA yehla ngokwanda kwethrafikhi.
Ubudlelwano phakathi kwe-NPSHA ne-NPSHR lapho ukugeleza kushintsha
Indlela yokubala ye-cavitation yedivayisi
HG = PC / I-ICC-HC-PV / ρG- [NPSH]
[NPSH] Imvume ye-cavitation ye--Altable
[NPSH] = (1.1 ~ 1.5) NPSHR
Lapho izinga lokugeleza likhulu, thatha inani elikhulu, futhi lapho isilinganiso sokugeleza sincane, thatha inani elincane.
Isikhathi Seposi: Jan-22-2024