Iyini i-NPSH nokuthi ungayivimbela kanjani i-cavitation phenomenon

I-NPSH ipharamitha ebalulekile ekala ikhono lepompo noma eminye imishini ewuketshezi ukuvimbela ukuhwamuka koketshezi ngaphansi kwezimo ezithile. Imelela amandla engeziwe ngeyunithi ngayinye yesisindo soketshezi endaweni yokungena yepompo edlula ingcindezi yokuhwamuka.

I-phenomenon of cavitation ingenxa yegesi ekhiqizwa uketshezi ekungeneni kwe-impeller ngaphansi kwengcindezi ethile ye-vacuum ngesikhathi sokusebenza kwepompo, okwenza ama-bubbles. Lawa mabhamuza, ngaphansi kokunyakaza komthelela wezinhlayiya eziwuketshezi, abangela ukuguguleka endaweni yensimbi ye-impeller, ngaleyo ndlela kulimaze i-impeller nezinye izinsimbi. Ukuvimbela i-cavitation, izinyathelo ezilandelayo zingathathwa:

Khulisa ingcindezi yokungenisa. Ngokwandisa ukucindezela kwe-inlet, ingcindezi yamanzi ingakhuphuka futhi ukuvela kwe-cavitation kungancishiswa.

Yehlisa izinga lokugeleza. Ukunciphisa izinga lokugeleza koketshezi kunganciphisa izinga lokuncipha kwengcindezi yoketshezi, kunciphise ukwakheka kwamabhamuza, futhi kuvimbele ukuvela kwezenzakalo ze-cavitation.

Thuthukisa ukwakheka kwemishini. Ngokwenza ngcono ukwakheka kwemishini, ukwehla kwengcindezi yoketshezi kungancishiswa, kuvimbele ngokuphumelelayo ukuvela kwama-bubbles kanye ne-cavitation.

Khulisa imajini ye-cavitation esebenzayo. I-NPSha esebenzayo yi-NPSha yedivayisi (ipayipi), ehlobene nendlela yokufaka iphampu. Ukwandisa inani layo kungathuthukisa ukusebenza kwe-anti cavitation yepompo.

Yehlisa i-NPSH edingekayo. I-NPSHr iyipharamitha eyisisekelo yokusebenza kwe-cavitation yepompo ngokwayo, futhi ukunciphisa inani layo kungathuthukisa ukusebenza kwe-anti cavitation yepompo.

Ngalezi zinyathelo, i-cavitation ingavinjelwa ngokuphumelelayo futhi ukusebenza okujwayelekile kwamaphampu neminye imishini yoketshezi kungavikelwa.

Amaphampu amaningi angakhuphula ukuphakama kwawo kokuzidonsa, kodwa awakwazi ukuxazulula inkinga ye-cavitation. Idatha ye-VSPi-vacuum eqinile ye-self priming pumpinokusebenza okuhle kwe-anti cavitation, enobude obuphezulu bokumunca obungaphezu kwamamitha ayi-8, futhi ngeke ikhiqize i-cavitation phenomenon.