Isingeniso kumagama avamile epompo (1) - izinga lokugeleza + izibonelo

1. Ukugeleza–Kubhekisela kumthamo noma isisindo soketshezi olulethwa yi-iphampu yamanzingesikhathi seyunithi ngayinye. Kuvezwa yi-Q, amayunithi okulinganisa asetshenziswa kakhulu yi-m3/h, m3/s noma i-L/s, t/h.

2. Ikhanda–Kubhekisela emandleni akhuphukile okuthutha amanzi nge-unit gravity kusuka endaweni yokungena kuya endaweni yokukhipha amanzi, okungukuthi, amandla atholakala ngemva kokuba amanzi nge-unit gravity edlula ephampini yamanzi. Uma ivezwa yi-h, iyunithi yi-Nm/N, evezwa ngokwesiko ngokuphakama kwekholomu yoketshezi lapho uketshezi lupontshwa khona; Ubunjiniyela ngezinye izikhathi buvezwa ngokucindezela komoya, kanti iyunithi esemthethweni yi-kPa noma i-MPa.

 ( Amanothi: Iyunithi: m/p = ρ gh)

Ngokusho kwencazelo:

H=E_d-E_s

E_d-Amandla ngeyunithi ngayinye yesisindo soketshezi ku-flange yokuphuma ye-outletiphampu yamanzi;

I-Es-Energy ngeyunithi ngayinye yesisindo soketshezi ku-flange yokungena yepompo yamanzi.

E_d=Z _d + P _d/ ρg + V²_d /2g

E_s=Z _s+ P_s / ρg+V²_s /2g

Ngokuvamile, ikhanda elisephepheni legama lephampu kufanele lifake izingxenye ezimbili ezilandelayo. Ingxenye eyodwa ukuphakama kwekhanda okulinganiselwe, okungukuthi, ukuphakama okuqondile kusuka ebusweni bamanzi echibini lokungena kuya ebusweni bamanzi echibini lokukhipha amanzi. Eyaziwa ngokuthi ikhanda langempela, ingxenye yalo ukulahlekelwa ukumelana endleleni lapho amanzi edlula epayipini, ngakho-ke lapho ukhetha ikhanda lephampu, kufanele kube yisamba sekhanda langempela kanye nokulahlekelwa ikhanda, okungukuthi:

Isibonelo sokubalwa kwekhanda lephampu

Uma ufuna ukuphakela amanzi esakhiweni esinde, ake sithi amanzi akhona ephampu angama-50m.³/h, futhi ukuphakama okuqondile kusukela ebusweni bamanzi echibini lokungenisa kuya ezingeni eliphakeme kakhulu lamanzi okulethwa kungama-54m, ubude obuphelele bepayipi lokulethwa kwamanzi bungama-150m, ububanzi bepayipi bungama-Ф80mm, nevalvu eyodwa engezansi, ivalvu eyodwa yesango kanye nevalvu eyodwa engabuyi, kanye nama-bend ayisishiyagalombili angu-900 ane-r/d = z, likhulu kangakanani ikhanda lephampu ukuze lihlangabezane nezidingo?

Isixazululo:

Kusukela esingenisweni esingenhla, siyazi ukuthi ikhanda lephampu yileli:

H =H_yangempela +H _{ukulahlekelwa}

Kuphi: H ukuphakama okuqondile kusukela ebusweni bamanzi ethangini lokungenisa amanzi kuya ezingeni eliphakeme kakhulu lokuhambisa amanzi, okungukuthi: H_yangempela=54m

H_{ukulahlekelwa}yizo zonke izinhlobo zokulahlekelwa okusendleleni, ezibalwa kanje:

Amapayipi okumunca nawokukhipha amanzi aziwayo, izindololwane, amavalvu, amavalvu angabuyi, amavalvu angaphansi kanye nobubanzi obunye bamapayipi bungama-80mm, ngakho-ke indawo yawo enqamulayo yile:

Uma izinga lokugeleza lingama-50 m³/h (0.0139 m³/s), isilinganiso sokugeleza esihambisanayo siyi:

Ukulahlekelwa ukumelana nobubanzi be-H, ngokusho kwedatha, lapho izinga lokugeleza koketshezi lingu-2.76 m/s, ukulahleka kwepayipi lensimbi eligqwalile kancane elingamamitha ayi-100 kungu-13.1 m, okuyisidingo salo msebenzi wokunikeza amanzi.

Ukulahleka kwepayipi lokukhipha amanzi, indololwane, ivalvu, ivalvu yokuhlola kanye nevalvu engezansi kuyanda.2.65m.

Ikhanda lejubane lokukhipha uketshezi embhobho:

Ngakho-ke, inhloko ephelele yepompo H

H _ikhanda= H _yangempela + H _{ukulahlekelwa okuphelele}=Abaneminyaka engu-54+19.65+2.65+0.388 = 76.692 (m)

Uma ukhetha ukuphakelwa kwamanzi aphezulu, iphampu yokuphakelwa kwamanzi enokugeleza okungaphansi kwama-50m³/ h kanye nekhanda elingaphansi kuka-77 (m) kufanele kukhethwe.