Taw qhia rau cov lus cog tseg uas nquag siv (1) - txaus + piv txwv

1.flow-Qhov rau hauv lub ntim lossis qhov hnyav ntawm cov kua uas tau xa los ntawmTso Kua MisIb ntu sijhawm.Enpressed los ntawm Q, cov chav siv feem ntau yog M3 / h, m3 / s lossis L / H.

2.HEAD-Qhov hais txog lub zog thauj khoom nrog cov khaub ncaws hnav los ntawm cov pas dej ntawm cov dej ntawm cov dej nrog cov khaub ncaws nqus hla dhau ntawm cov taub dej. Qhia los ntawm h, chav tsev yog nm / n, uas yog qhia los ntawm qhov siab ntawm kem nyob rau qhov twg cov kua tau nqus; Kev tsim kho hluav taws xob qee zaum tau hais los ntawm cov kev siv hluav taws xob siab, thiab chav raws yog KPA lossis MPa.

 (Sau ntawv: Chav: m/p = ρ gh)

Raws li cov lus txhais:

H = e_d-E_s

E_d-Txoj kev ua haujlwm hnyav ntawm cov kua ntawm qhov hluav taws xob flange ntawm lubTso Kua Mis;

Es-zog ib chav phaus ntawm cov kua ntawm inlet flange ntawm cov taub dej.

E_d=Z _d + P _d/ ρ + V²_d 2g

E_s=Z _s+ P_s / ρg + v²_s 2g

Feem ntau, lub taub hau ntawm lub npe ntawm lub twj tso kua mis yuav tsum muaj ob ntu. Ib feem yog ntsuas qhov siab ntsuas qhov siab, uas yog qhov siab ntsug los ntawm cov dej saum npoo ntawm lub inlet pas dej rau hauv cov dej ntawm lub pas dej. Lub npe hu ua lub taub hau tiag tiag, ib feem ntawm nws yog qhov kev tiv thaiv kev tiv thaiv thaum lub taub hau tso tawm, yog li thaum xaiv lub taub hau lub taub hau thiab lub taub hau poob, uas yog:

Piv txwv ntawm nqus lub taub hau lub taub hau kev xam

Yog tias koj xav muab cov dej ua ke rau lub tsev siab tshaj plaws, xav tias cov dej tsis muaj dej ntawm lub twj tso kua mis yog 50m³/ h, thiab qhov siab ntsug los ntawm cov dej saum npoo ntawm qhov chaw xa dej yog ф88 ​​ф of of of of and and to to to of of of to to to to to to to to to to to to to to to to to to to to to to to to to to to to and and and and to to to to to to to to to to to to to to to to to and to to to to to to to to to to to to toល total and and to to to to to to to to of to of,, to of to toល total, and to to to to toល total, and,, ,ល

Lus teb:

Los ntawm cov lus qhia saum toj no, peb paub tias lub taub hau taub yog:

H =H_{muaj tiag} +H _poob

Qhov twg: h yog qhov siab ntsug los ntawm cov dej saum npoo ntawm lub inlet tank mus rau theem dej siab tshaj plaws, uas yog: h_{muaj tiag}= 54m

H_poobPuas yog txhua yam poob rau hauv lub raj dej, uas tau suav nrog hauv qab no:

Paub Suction thiab cov kav dej ntws tawm, li qub, qub txeeg qub teg, yog li lwm qhov diam diamet yog 80mm, yog li nws tus ntoo khaub ncaws yog:

Thaum tus nqi txaus yog 50 m³/ h (0.0139 m³/ s), tus ntsuas nruab nrab ntawm tus nqi nruab nrab yog:

Cov kab mob tsis kam raws li txoj kab uas hla ntawm cov ntaub ntawv, thaum cov roj ntsha txaus yog 2.76 me ntsis Rusted steel yeeb yog 13.1 m, uas yog qhov kev xav tau ntawm cov khoom siv dej no.

Qhov poob ntawm cov yeeb nkab ntws, luj tshib, valve, kos valve thiab hauv qab valve yog2.65m.

Velocity taub hau rau kev rho tawm kua los ntawm nozzle:

Yog li ntawd, tag nrho lub taub hau h ntawm lub twj tso kua mis

H _{lub taub hau}= H _{muaj tiag} + H _{Tag nrho poob}=54+19.65 + 2.65+0.388 = 76.692 (m)

Thaum xaiv cov dej haus dej siab, cov dej khoom siv cov twj tso kua mis nrog cov dej ntws tsawg dua 50m³/ h thiab taub hau tsis tsawg dua 77 (m) yuav tsum raug xaiv.