Cavitation yePump: Dzidziso uye Kuverenga
Kuongorora kweCavitation phenomenon
Dzvinyiriro yemvura yemvura ndeyekumanikidzwa kwemvura yemvura (yakazara vapor kumanikidzwa). Iyo vaporization kumanikidza kwemvura kunoenderana nekushisa. Iyo yepamusoro tembiricha, yakakura kudzvinyirira. Iyo vaporization kudzvinyirira kwemvura yakachena pamhepo tembiricha ye20 × ndeye 233.8pa. Nepo iyo vaporization kudzvinyirira kwemvura pa100 × is 101296pa. Naizvozvo, mvura yakachena pamhepo tembiricha (20 ℃) inotanga kuputika padzinodzvanywa padzinodonha kusvika 233.8pa.
Kana dzvinyiriro yemvura ichideredzwa kune iyo vaporization kudzvinyirira pane imwe tembiricha, iyo mvura ichabereka mabhuruku, iyo inonzi cavitation. Nekudaro, iyo iyo mupfuro mune yebhuruu haina kunyatso steam, asi zvakare ine gasi (kunyanya mhepo) muchimiro chekuparadzwa kana nucleus.
Kana mabhuruku ikagadzira panguva yekubuda kwekutsamwisa zvakanyanya, vhoriyamu yavo inoderera uye kunyange kuputika. Ichi chiitiko icho mabhurukuti mabhuru anopera mumvura nekuda kwekumanikidza kusimuka kunonzi cavation kuparara.
Chiitiko chekutenderera mune pombi
Kana pombi iri kushanda, kana iyo nzvimbo yemunharaunda yezvikamu zvazvino (kazhinji pane imwe nzvimbo kumashure kweiyo inlet yeiyo impeller blade). Nechimwe chikonzero, kana kudzvinyirira kwemvura yakadonhedzwa kwemvura inodonha kumanyowa ekudzvinyirira panguva ino kupisa, mvura inotanga kuputika ipapo, kugadzira muputi uye kugadzira mabhuru. Aya mabhuru anoyerera mberi nemvura, uye pavanosvika kune imwe kudzvinyirira, iyo yakanyanya kudzvinyirira mvura yakatenderedza mabhuruku anodzora mabhuruku abvisa zvakapusa uye kunyange kuputika. Kana iyo bubble inoputika, yemvura chimvura ichazadza iyo marara pakumhanya uye kuwirirana nemumwe kuti aumbe nyundo yemvura. Ichi chiitiko chinokonzeresa kukanganisa kwezvinhu zvakavanzika pazvinhu zvazvino pazvinoitika pamadziro akasimba.
Iyi process ndiyo pombi yekuzadza maitiro.
Pesvedzero yemapombi cavation
Gadzira ruzha uye vibration
Kukuvadzwa kweCorrosion kwezvinhu zvinopfuura-zvazvino
Kuita Kwekuita
Pombi cavitation basic equation
NPSH hr
NPSHA-Kubvumidzwa Kwekutanga kweChidzitiro zvakare kunonzi zvakare zvinobudirira kubvumidzwa, izvo zvinopihwa neshinda yekubira. Iyo yakakura iyo NPSHA, iyo isingangoita pombi ichatora. NPSHA inoderera nekuwedzera kwe traffic.
Hukama pakati ppha uye npshr kana kuyerera kuchinja
Nzira yekuverenga yeiyo mudziyo
HG = PC / ρG-HC-PV / ρG- [NPSH]
[NPSH] -Lallable Cavitation Kubvumidzwa
[NPSH] = (1.1 ~ 1.5) npshr
Kana huwandu hwekuyerera huchikura, tora kukosha kukuru, uye kana huwandu hwekuyerera hushoma, tora kukosha kudiki.
Kutumira Nguva: Jan-22-2024