Pakusarudzwa kwepombi yemvura, kana kusarudzwa kusina kunaka, mari yacho inogona kunge yakakwirira kana kuti kunyatsoita kwepombi kunogona kusasangana nezvinodiwa zvepaiti. Zvino ipa muenzaniso unoratidza mamwe misimboti iyo pombi yemvura inoda kutevedzera.
Kusarudzwa kwepombi yekudhonza kaviri kunofanirwa kutarisisa kune anotevera mapoinzi:
1. Kumhanya:
Kumhanya kwakajairika kunotarwa zvinoenderana nezvinodiwa nemutengi. Iyo yakaderera kumhanya kwepombi imwechete, iyo inoyerera inoyerera mwero nekusimudza ichaderera. Paunenge uchisarudza modhi, zvinodikanwa kuti utarise kwete chete maitiro ehupfumi, asiwo mamiriro esaiti, senge: viscosity yepakati, kupfeka kuramba, kugona kuzvimiririra, vibration zvinhu, nezvimwe.
2. Kutsunga kweNPSH:
Iyo NPSH inogona kutariswa zvichienderana nekukosha kwakapihwa nemutengi, kana zvinoenderana neinopinza mamiriro epombi, yepakati tembiricha uye pane-saiti yemhepo kumanikidza:
Iko kuverengerwa kwekumisikidzwa kwepombi yemvura (yakareruka algorithm: zvinoenderana neyakajairwa atmospheric pressure uye yakajairika tembiricha mvura) ndeiyi inotevera:
Pakati pavo: hg-geometric installation height (positive value is suction up, negative value is reverse flow);
-Atmospheric pressure yemvura musoro panzvimbo yekumisikidza (yakaverengerwa se10.33m pasi peyakajairwa mhepo yemhepo uye mvura yakachena);
hc-kusveta hydraulic kurasikirwa; (kana pombi yekupinza iri ipfupi uye isina kuoma, inowanzoverengerwa se 0.5m)
-Vaporization kumanikidza musoro; (mvura yakachena pakupisa kwekamuri inoverengwa se 0.24m)
- Inobvumirwa NPSH; (kuve nechokwadi chekuchengetedza, kuverenga zvinoenderana neNPSHr×1.2, NPSHr ona catalog)
Semuenzaniso, iyo NPSH NPSHr = 4m: Zvadaro: hg = 10.33-0.5-0.24- (4×1.2) = 4.79 m (mugumisiro wekugadzirisa mutengo wakanaka, zvinoreva kuti inogona kuyamwa kusvika ≤4.79m, kureva kuti , mvura inopinza mvura inogona kunge iri mu impeller Mukati me 4.79m pasi pemutsara wepakati, kana iri pasi pekumanikidzwa kusina kunaka, inofanira kudururirwa shure, uye kukosha kwekudururira shure kunofanira kuva kwakakura kudarika kukosha kwakaverengwa, ndiko kuti, mvura; inlet level inogona kuva pamusoro peiyo yakaverengerwa kukosha pamusoro pepakati mutsara we impeller).
Izvo zviri pamusoro zvinotarirwa pasi pemamiriro ekushisa kwemazuva ose, mvura yakachena uye yakakwirira yakakwirira. Kana iyo tembiricha, density uye urefu hwepakati zvisina kujairika, kuitira kuti udzivise cavitation uye mamwe matambudziko anokanganisa kushanda kwakajairwa kwepombi seti, zviyero zvinoenderana zvinofanirwa kusarudzwa uye zvinotsiviwa muchimiro chekuverenga. Pakati pavo, tembiricha uye density yepakati inoverengerwa zvinoenderana neiyo inowirirana kukosha mu "Vaporization Pressure uye Density yeMvura pane Different Temperatures", uye urefu hwacho hunoverengerwa zvinoenderana nehunhu hunoenderana mu "Altitude uye Atmospheric Pressure yeMakuru Cities mu. Nyika". Imwe NPSH inotenderwa ndeyekuona chengetedzo, zvinoenderana neNPSHr × 1.4 (ukoshi uhwu hunenge 1.4).
3. Apo kupindira kwepombi yepombi yakajairwa ≤0.2MPa, apo inlet pressure + musoro × 1.5 nguva ≤ kudzvinyirira, sarudza maererano nemashoko anowanzo;
Inlet pressure + musoro × 1.5 nguva > kudzvinyirira kudzvinyirira, izvo zvakajairwa zvinhu zvinosangana nezvinodiwa zvinofanira kushandiswa; kana iyo inlet pressure yakanyanya kana kuti test pressure yakanyanya, nezvimwewo zvisingaite zvinodiwa, ndapota simbisa nehunyanzvi hwekutsiva zvinhu kana kugadzirisa mold uye kuwedzera madziro emadziro;
4.Conventional pump mechanical seal models ndeye: M7N, M74 uye M37G-G92 series, iyo imwe yekushandisa inobva pakugadzirwa kwepombi, yakajairika mechanical seal material: yakaoma / soft (tungsten carbide / graphite); kana inlet pressure iri ≥0.8MPa, Chisimbiso chemagetsi chakaenzana chinofanira kusarudzwa;
5. Zvinokurudzirwa kuti tembiricha yepakati yepombi yekudhonza kaviri haifaniri kudarika 120 ° C. Kana 100 ° C ≤ yepakati tembiricha ≤ 120 ° C, pombi yakajairika inoda kugadziriswa: chisimbiso chekuvhara uye chikamu chinotakura chinofanira kunge chakashongedzwa nemvura inotonhorera kunze kwegomba rinotonhora; ese O-mhete dzepombi dzakagadzirwa neZvese kushandiswa: fluorine rubber (kusanganisira muchina chisimbiso).
Nguva yekutumira: May-10-2023