Intshayelelo kwimigaqo yempompo eqhelekileyo (1) - izinga lokuhamba + imizekelo

1.Phuma-Ibhekisa kumthamo okanye ubunzima bolwelo oluhanjiswa yiimpompo yamanzingexesha leyunithi.Ichazwe nguQ, iiyunithi ezisetyenziswa ngokuqhelekileyo zokulinganisa ziyi-m3/h, m3/s okanye L/s, t/h.

2.Intloko-Ibhekisela kumandla okwandayo okuthutha amanzi kunye neyunithi yomxhuzulane ukusuka kwi-inlet ukuya kwi-outlet yempompo yamanzi, oko kukuthi, amandla afunyenwe emva kokuba amanzi aneyunithi ye-gravity edlula kwimpompo yamanzi. Ivakaliswe ngo-h, iyunithi yi-Nm/N, ngokuqhelekileyo ibonakaliswa ngobude bekholamu yolwelo apho ulwelo lumpontshwa khona; Ubunjineli ngamanye amaxesha bubonakaliswa luxinzelelo lwe-atmospheric, kwaye iyunithi yezomthetho yi-kPa okanye iMPa.

 ( Amanqaku: Iyunithi: m/p = ρ gh)

Ngokwengcaciso:

H=E_d-E_s

E_d-Amandla ngeyunithi nganye ubunzima bolwelo kwiflange yokuphuma yeimpompo yamanzi;

Es-Energy ngeyunithi ubunzima bolwelo kwi-inlet flange yempompo yamanzi.

E_d=Z _d + P _d/ ρg + V²_d /2g

E_s=Z _s+ P_s / ρg+V²_s /2g

Ngokuqhelekileyo, intloko kwi-nameplate yepompo kufuneka ibandakanye ezi zimbini zilandelayo. Enye inxalenye bubude obunokulinganiswa besihloko, oko kukuthi, ukuphakama okuthe nkqo ukusuka kumphezulu wamanzi wedama lokungena ukuya kumphezulu wamanzi wedama lokuphuma. Eyaziwayo njengentloko yokwenyani, inxalenye yayo yilahleko yokuchasana endleleni xa amanzi edlula kumbhobho, ngoko xa ukhetha intloko yempompo, kufuneka ibe sisimbuku sentloko yokwenyani kunye nokulahleka kwentloko, oko kukuthi:

Umzekelo wokubala kwentloko yempompo

Ukuba ufuna ukubonelela ngamanzi kwisakhiwo esiphakamileyo, cinga ukuba unikezelo lwamanzi lwangoku lwempompo luyi-50m.³/ h, kunye nobude obuthe nkqo ukusuka kumphezulu wamanzi wedama lokungena ukuya kwelona nqanaba liphezulu lokuhanjiswa kwamanzi yi-54m, ubude bebonke bombhobho wokuhambisa amanzi yi-150m, ububanzi bombhobho yi-Ф80mm, kunye nevalve enye esezantsi, ivalve yesango enye kunye ivalve enye engabuyiyo, kunye nesibhozo se-900 igoba nge-r / d = z, inkulu kangakanani intloko yempompo ukuhlangabezana neemfuno?

Isisombululo:

Ukususela kwintshayelelo engentla, siyazi ukuba intloko yempompo yile:

H =H_yokwenyani +H _ilahleko

Apho: H bubude obuthe nkqo ukusuka kumphezulu wamanzi wetanki yokungena ukuya kwelona nqanaba liphezulu lokuhambisa amanzi, oko kukuthi: H._yokwenyani=54m

H_ilahlekozizo zonke iintlobo zelahleko kumbhobho, ezibalwa ngolu hlobo lulandelayo:

Imibhobho eyaziwayo yokufunxa kunye neyokukhupha amanzi, iingqiniba, iivalvu, iivalvu ezingabuyiyo, iivalve ezisezantsi kunye nezinye iidayamitha zemibhobho ziyi-80mm, ngoko ke indawo yayo enqamlezileyo yile:

Xa izinga lokuhamba liyi-50 m³/h (0.0139 m³/s), umndilili ohambelana nomyinge wokuqukuqela:

Ilahleko yokumelana kunye nobubanzi H, ngokutsho kwedatha, xa izinga lokuhamba kwamanzi li-2.76 m / s, ilahleko ye-100 yemitha ye-rusted kancinane umbhobho wentsimbi yi-13.1 m, eyimfuno yale projekthi yokubonelela ngamanzi.

Ukulahleka kombhobho wokukhupha amanzi, ingqiniba, ivalve, ivalve yokutshekisha kunye nevalve esezantsi2.65m.

Intloko yesantya sokukhupha ulwelo emlonyeni:

Ngoko ke, intloko epheleleyo ye-H yepompo

H _intloko= H _yokwenyani + H _{ilahleko iyonke}=54+19.65+2.65+0.388 = 76.692 (m)

Xa ukhetha unikezelo lwamanzi oluphezulu, impompo yonikezelo lwamanzi kunye nempompo engekho ngaphantsi kwe-50m³/ h kunye nentloko engekho ngaphantsi kwe-77 (m) kufuneka ikhethwe.