Pakusarudza pombi dzemvura, kana sarudzo yacho isina kunaka, mutengo unogona kunge wakakwira kana kuti kushanda kwepombi chaiyo kungasaenderana nezvinodiwa nenzvimbo yacho. Zvino ipa muenzaniso unoratidza dzimwe nheyo dzinofanira kuteverwa nepombi yemvura.
Kusarudzwa kwepombi yekusveta kaviri kunofanirwa kutariswa nepfungwa dzinotevera:
1. Kumhanya:
Kumhanya kwakajairika kunotsanangurwa zvichienderana nezvinodiwa nemutengi. Kumhanya kwakaderera kwepombi imwe chete, mwero wekuyerera kwemvura unoenderana uye kukwira kwemvura zvinodzikira. Pakusarudza modhi, zvakakosha kufunga kwete chete nezvekushanda kwemari, asiwo mamiriro enzvimbo, akadai se: viscosity yechinhu chacho, kuramba kupfeka, kugona kuzvigadzirira, zvinhu zvinodedera, nezvimwewo.
2. Kuongororwa kweNPSH:
NPSH inogona kutsanangurwa zvichienderana nekukosha kwakapihwa nemutengi, kana zvichienderana nemamiriro ekupinda kwepombi, tembiricha yepakati uye kumanikidzwa kwemhepo panzvimbo yacho:
Kuverengwa kwehurefu hwekuisa pombi yemvura (algorithm iri nyore: zvichienderana nekumanikidzwa kwemhepo uye tembiricha yemvura yakajairika) ndeiyi inotevera:
Pakati pazvo: hg—hurefu hwekuisa kwejometri (kukosha kwakanaka ndiko kudhonza kumusoro, kukosha kusina kunaka ndiko kuyerera kwemashure);
—Musoro wemvura inomanikidzwa nemhepo panzvimbo yekuisa (inoverengerwa se10.33m pasi pekumanikidzwa kwemhepo kwakajairika nemvura yakachena);
hc—kurasikirwa kwehydraulic; (kana pombi yekupinda iri pfupi uye iri nyore, inowanzo verengerwa se 0.5m)
—Musoro wekumanikidzwa kwemhepo; (mvura yakachena patembiricha yemumba inoverengwa se 0.24m)
— NPSH inobvumidzwa; (kuti uve nechokwadi chekuchengetedzwa, verenga zvinoenderana neNPSHr×1.2, NPSHr ona katalogi)
Semuenzaniso, NPSH NPSHr=4m: Zvadaro: hg=10.33-0.5-0.24-(4×1.2)=4.79 m (mhedzisiro yekugadziriswa kwemvura inhamba yakanaka, zvinoreva kuti inogona kusveta kusvika ≤4.79m, kureva kuti, huwandu hwemvura inogona kupinda muimpeller huri mukati me4.79m pasi pemutsetse wepakati; kana iri pasi pekumanikidzwa kwakashata, inofanira kudururwa, uye kukosha kwekudurura kwemvura kumashure kunofanira kunge kwakakura kupfuura kukosha kwakaverengerwa, kureva kuti, huwandu hwemvura inogona kupinda muimpeller hunogona kunge huri pamusoro pemutengo wakaverengerwa pamusoro pemutsetse wepakati weimpeller).
Zviri pamusoro apa zvinoverengerwa pasi pemamiriro ekupisa kwakajairika, mvura yakachena uye kukwirira kwakajairika. Kana tembiricha, kuwanda uye kukwirira kwenzvimbo yacho zvisina kujairika, kuitira kudzivirira cavitation nezvimwe zvinetso zvinokanganisa mashandiro akajairika epombi, kukosha kwakakodzera kunofanira kusarudzwa uye kuchinjwa mufomura yekuverenga. Pakati pazvo, tembiricha uye kuwanda kwenzvimbo yacho zvinoverengerwa zvichienderana nemitengo inoenderana mu "Vaporization Pressure and Density of Water at Different Temperatures", uye kureba kunoverengerwa zvichienderana nemitengo inoenderana mu "Altitude and Atmospheric Pressure of Major Cities in the Country". Imwe NPSH inobvumirwa ndeyekuona kuchengetedzeka, zvichienderana neNPSHr×1.4 (kukosha uku kunenge 1.4).
3. Kana kumanikidzwa kwepombi yemuchina wemagetsi kuri ≤0.2MPa, kana kumanikidzwa kwepombi yemagetsi + musoro × ka1.5 ≤ kumanikidzwa kwemhepo, sarudza zvinoenderana nezvinhu zvemuchina wemagetsi;
Kumanikidzwa kwemuchina wekupinda + musoro × ka1.5 kanokwana kumanikidzwa kwekudzvinyirira, zvinhu zvakajairwa zvinosangana nezvinodiwa zvinofanirwa kushandiswa; kana kumanikidzwa kwemuchina wekupinda kwakanyanya kana kumanikidzwa kwekuyedza kwakanyanya, nezvimwewo zvisingasangane nezvinodiwa, ndapota simbisa nehunyanzvi hwekutsiva chinhu chacho kana kugadzirisa mold uye kuwedzera ukobvu hwemadziro;
4. Mamodheru echisimbiso chemakanika epombi akajairika ndeaya: M7N, M74 uye M37G-G92 series, ayo ekushandisa anoenderana nekugadzirwa kwepombi, zvinhu zvechisimbiso chemakanika zvetsika: chakaoma/chinyoro (tungsten carbide/graphite); kana kumanikidzwa kwekupinda kuri ≥0.8MPa, chisimbiso chemakanika chakaenzana chinofanira kusarudzwa;
5. Zvinokurudzirwa kuti tembiricha yepakati pepombi inosvuta kaviri isapfuure 120°C. Kana 100°C ≤ tembiricha yepakati ≤ 120°C, pombi yemazuva ano inofanira kugadziriswa: nzvimbo inovhara nechikamu chekutakura zvinofanirwa kunge zvakashongedzwa nemvura inotonhorera kunze kwenzvimbo inotonhorera; maO-ring ese epombi akagadzirwa neZvese zvinoshandiswa: fluorine rabha (kusanganisira chisimbiso chemuchina).
Nguva yekutumira: Chivabvu-10-2023