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

1.Ukugeleza-Ibhekisela kumthamo noma isisindo soketshezi olulethwa yi-iphampu yamanzingesikhathi seyunithi.Kuvezwe ngu-Q, amayunithi okulinganisa asetshenziswa kakhulu yi-m3/h, m3/s noma L/s, t/h.

2.Ikhanda-Kubhekisela emandleni andayo okuthutha amanzi ngeyunithi ye-gravity esuka endaweni yokungena kuya lapho kuphuma khona iphampu yamanzi, okungukuthi, amandla atholakala ngemva kokuba amanzi aneyunithi ye-gravity edlula empompini yamanzi. Ivezwa ngo-h, iyunithi ithi Nm/N, okuvamise ivezwa ukuphakama kwekholomu ewuketshezi lapho uketshezi lumpontshwa khona; Ubunjiniyela kwesinye isikhathi buvezwa ukucindezela komkhathi, kanti iyunithi yezomthetho yi-kPa noma i-MPa.

 (Amanothi: Iyunithi: m/p = gh)

Ngokusho kwencazelo:

H=E_d-E_s

E_d-Amandla ngeyunithi ngayinye yesisindo se-liquid endaweni ye-outlet flangeiphampu yamanzi;

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

E_d=Z _d + P _d/ ρg + V²_d /2g

E_s=Z _s+ P_s / ρg+V²_s /2g

Ngokuvamile, ikhanda eliseceleni kwegama lepompo kufanele lifake izingxenye ezimbili ezilandelayo. Ingxenye eyodwa ubude besihloko obulinganisekayo, okungukuthi, ukuphakama okuqondile ukusuka endaweni yamanzi echibini lokungena kuya endaweni yamanzi echibini lokuphuma. Eyaziwa njengekhanda langempela, ingxenye yalo ukulahlekelwa ukumelana endleleni lapho amanzi edlula epayipini, ngakho-ke lapho ukhetha ikhanda lepompo, kufanele kube isamba sekhanda langempela kanye nokulahlekelwa kwekhanda, okungukuthi:

Isibonelo sokubala kwekhanda lephampu

Uma ufuna ukuphakela amanzi esakhiweni esiphezulu, ake sithi amanzi akhona ephampu angama-50m.³/h, futhi ukuphakama okuqondile ukusuka ebusweni bamanzi echibini lokungena kuye ezingeni eliphakeme kakhulu lokuletha amanzi ngu-54m, ubude bepayipi lokulethwa kwamanzi bungu-150m, ububanzi bepayipi ngu-Ф80mm, ne-valve eyodwa engezansi, i-valve yesango elilodwa kanye ivalve eyodwa engabuyi, kanye nesishiyagalombili 900 agobe nge r/d = z, likhulu kangakanani ikhanda lepompo ukuze lihlangabezane nezidingo?

Isixazululo:

Kusukela esethulweni esingenhla, siyazi ukuthi inhloko yepompo yile:

H =H_okwangempela +H _{ukulahlekelwa}

Kuphi: H ubude obuqondile ukusuka ebusweni bamanzi ethangi lokungena ukuya ezingeni eliphakeme kakhulu lamanzi elidlulisa amanzi, okungukuthi: H_okwangempela=54m

H_{ukulahlekelwa}yizo zonke izinhlobo zokulahlekelwa ezisephayiphini, ezibalwa ngale ndlela elandelayo:

Amapayipi aziwayo okumunca nawokudonsa amanzi, izindololwane, amavalvu, amavalvu angabuyi, amavalvu aphansi kanye namanye amadayamitha amapayipi angu-80mm, ngakho indawo yawo ephambanayo ithi:

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

Ukulahlekelwa kokumelana nobubanzi H, ngokusho kwedatha, lapho izinga lokugeleza kwe-liquid liyi-2.76 m / s, ukulahlekelwa kwepayipi lensimbi eligqwalile elingamamitha ayi-100 liyi-13.1 m, okuyisidingo salo msebenzi wokuhambisa amanzi.

Ukulahleka kwepayipi lokudonsa, indololwane, ivalvu, i-valve yokuhlola kanye ne-valve engezansi2.65m.

Inhloko yesivinini sokukhipha uketshezi ku-nozzle:

Ngakho-ke, ikhanda eliphelele H lepompo liyi

H _ikhanda= H _okwangempela + H _{ukulahlekelwa okuphelele}=54+19.65+2.65+0.388 = 76.692 (m)

Lapho ukhetha ukuhlinzekwa kwamanzi asezingeni eliphezulu, iphampu yokuphakela amanzi egeleza engekho ngaphansi kwama-50m³/ h nekhanda elingekho ngaphansi kwama-77 (m) kufanele kukhethwe.