Selelekela ka lipehelo tse tloaelehileng tsa pomm (1) - sekhahla sa phallo

1.flow-Kefera ho moqolotsi kapa boima ba mokelikeli o fanoeng kePompo ea metsiKa nako ea yuniti ea yunity.Exothoned ke q, likarolo tse sebelisoang haholo tsa tekanyo ke M3 / h, m3 / s, t / h.

2.head-Ko e bolela matla a eketsehileng a ho tsamaisa metsi ka matla a khoheli a tsoang setsing sa pompo ea metsi a fetang ka pompo ea metsi. E hlahisitsoeng ke H, yuniti ke NM / n, eo ka tloaelo e hlahisoang ke bophahamo ba mokelikeli moo metsi a phumuang; Boenjiniere ka linako tse ling ho hlalosoa ke khatello ea sepakapakeng, 'me yuniti ea molao ke kpa kapa mpa.

 (Lintlha: Yuniti: m/p = ρ gh)

Ho latela tlhaloso:

H = e_d-E_s

E_d-Eornergy ka boima ba 'mele oa metsi ho feta lehata le lethekeng laPompo ea metsi;

Mekhoa e metle ea yuniti e le ngoe ea metsi a metsi ho Inlet Ho Inlet Ho Inlet Ho Inlet Ho Inlet Onlet

E_d=Z _d + P _d/ ρg + V²_d / 2G

E_s=Z _s+ P_s / ρg + v²_s / 2G

Hangata, hlooho ho leqephe la pompo e lokela ho kenyelletsa likarolo tse peli tse latelang. Karolo e le 'ngoe ke bophahamo bo leka-lekaneng, ke hore, bophahamo ba ntho e otlolohileng metsing a metsi ho ea ponong ea metsi. Known as the actual head, part of it is the resistance loss along the way when water passes through the pipeline, so when choosing the pump head, it should be the sum of the actual head and the head loss, that is:

Mohlala oa lipalo tsa hlooho ea pompo

Haeba u batla ho fana ka metsi moahong o phahame o phahameng, o re re phepelo ea metsi ea morao-rao ea pompo ke 50m³/ H, bophahamo ba bophahamo ba metsi bo tsoang bophahamong ba metsi ho isa ho 50m, bolelele ba pompo e tlase, le z = z, e kholo hakae ho fihlela litlhoko tse kholo?

Tharollo:

Ho tsoa kenyelletsong e kaholimo, rea tseba hore hlooho ea pompo ke ena:

H =H_Real +H _tahlehelo

Moo: H ke bophahamo ba bophahamo ba metsi a tsoang holim'a tanka ea Intet ea ho fetisa metsi tse phahameng ka ho fetisisa tsa metsi, ke: h_Real= 54m

H_tahleheloMefuta eohle ea tahlehelo e ka pompoline, e baloang ha e latela:

Super ea tsebahalang le peishene, liqha, li-valves, li-valves tse tlase le sebaka sa eona sa lipekere ke:

Ha sekhahla sa ho phalla ke 50 m³/ h (0.0139 m³/ s), sekhahla se tsamaeang ka mokhoa o tšoanang ke:

Tahlehelo ea bohanyetsi haufi le bophara ba eona, ha sekhahla sa ho phalla ha metsi ke 2.16 m

Tahlehelo ea Drain Pipe, elbow, valve, hlahloba valve le tlase ho2.65m.

Sethala sa Velocity bakeng sa metsi a tsoang ho nozzle:

Ka hona, hlooho e felletseng H ea pompo ke

H _hlooho= H _Real + H _{Tahlehelo e felletseng}=54+19.65 + 2.65+0.388 = 76.699 (M)

Ha o khetha phepelo ea metsi a phahameng ea metsi, pompo ea phepelo ea metsi e nang le phallo e ka tlase ho 50m³/ H le hlooho e se ka tlase ho 77 (m) e lokela ho khethoa.