Matapaki mo te momo whiriwhiringa o te papu momi rua

I roto i enei: hg—te teitei whakaurunga ahuahanga (ko te uara pai ko te momi ake, ko te uara kino ko te rere whakamuri);

—Te upoko wai pehanga atmospheric i te waahi whakaurunga (kua tatauhia hei 10.33m i raro i te pehanga hau me te wai marama);

hc-momi waipēhi mate;(mehemea he poto te paipa urunga me te kore uaua, ka kiia ko te 0.5m)

—Upoko pehanga ngohanga;(Ko te wai marama i te pāmahana rūma ka tatauhia hei 0.24m)

- NPSH Whakaaetia;(hei whakarite i te haumaru, tatauhia kia rite ki te NPSHr×1.2, NPSHr tirohia te raarangi)

Hei tauira, ko te NPSH NPSHr=4m: Na: hg=10.33-0.5-0.24-(4×1.2)=4.79 m (te hua whakataunga he uara pai, ko te tikanga ka taea te ngote ki te ≤4.79m, ara. , ka taea te urunga wai ki roto i te impeller I roto i te 4.79m i raro i te raina pokapū; mena kei raro i te pehanga kino, me riringi ki muri, a ko te uara o te ringihanga o muri me nui ake i te uara tatau, ara, te wai. Ko te taumata o roto kei runga ake i te uara tatau i runga ake i te raina waenga o te impeller).

Ko nga mea i runga ake ka tatauhia i raro i te ahua o te pāmahana noa, te wai maamaa me te teitei noa.Mena he rereke te pāmahana, te kiato me te teitei o te reo, hei karo i te cavitation me etahi atu raruraru e pa ana ki te mahi noa o te huinga papu, me kowhiria nga uara e rite ana me te whakakapi ki te tauira mo te tatauranga.I roto ia ratou, ko te pāmahana me te kiato o te reo ka tatauhia kia rite ki nga uara e rite ana i roto i te "Vaporization Pressure and Density of Water at Different Temperatures", a ko te teitei ka tatauhia kia rite ki nga uara e rite ana i roto i te "Altitude and Atmospheric Pressure of Major Cities in te Whenua".Ko tetahi atu NPSH e whakaaetia ana ko te whakarite i te haumaru, e ai ki te NPSHr×1.4 (ko tenei uara he iti rawa te 1.4).

3. A, no te ≤0.2MPa te pehanga urunga o te papu tikanga, ka pehanga te urunga + upoko × 1.5 wa ≤ te pehanga pehanga, tohua kia rite ki nga rauemi tikanga;

Te pehanga whakauru + upoko × 1.5 wa> te pehanga pehanga, me whakamahi nga mea paerewa e tutuki ana i nga whakaritenga;ki te mea he tiketike rawa te pehanga urunga, he nui rawa atu ranei te pehanga whakamatautau, me etahi atu e kore e tutuki i nga whakaritenga, tena koa whakauhia me te hangarau ki te whakakapi i te rauemi, ki te whakatika ranei i te pokepokea ai me te whakanui ake i te matotoru o te pakitara;

4.Conventional papu mihini tauira hiri he: M7N, M74 me M37G-G92 raupapa, e tetahi ki te whakamahi i runga i te hoahoa papu, rauemi hiri miihini tikanga: pakeke / ngohengohe (tungsten carbide / graphite);i te wa e ≥0.8MPa te pehanga whakauru, Me whiriwhiri he hiri miihini taurite;

5. E taunaki ana kia kaua e neke ake i te 120°C te pāmahana reo o te papu momi-rua.A, no te 100°C ≤ pāmahana reo ≤ 120°C, Me te papu tikanga ki te whakatika: te kōhao hiri me te wahi whanau me rite rawa ki te wai mātao waho te kōhao tautauā;Ko nga O-mowhiti katoa o te papu he mea hanga ki te whakamahi e rua: rapa fluorine (tae atu ki te hiri miihini).