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Marija Djurovic

KAPACITET CENTRIFUGALNE PUMPE
JasminaVučković
Ugledničas
Hemijsko prehrambena tehnološka škola

Klipna
pumpa
Rotaciona
pumpa
Centrifugalna
pumpa
Transport fluida

Transport fluida
Klipna
pumpa
Rotaciona
pumpa
Centrifugalna
pumpa

Kapacitet
Visina potiskivanja fluida
Stepen korisnog dejstva
Karakteristike centrifugalne pumpe

Kapacitet centrifugalne pumpe
Koliko litara ? Za koliko vremena ?

Veličina koja definiše
zapreminu fluida
koja protekne
u jedinici vremena
zove se:
ZAPREMINSKI PROTOK
V
Vs =
τ
Formula
m3
s

jednak je
Kapacitet centrifugalne pumpe
ZAPREMINSKOM PROTOKU
Vs = Wc Sc
Formula
brzina fluida u cevi površina poprečnog
preseka cevi
.

a) Čime treba izmeriti veličine da bi se izračunao
KAPACITET?

Centrifugalna pumpa
prigušna ploča
U manometar

b) Koje veličine treba izmeriti da bi se izračunao
KAPACITET?

Visinska razlika na U manometru: ∆h
U manometar
∆

brzina strujanja fluida u cevi
(određuje se preko jednačine kontinuiteta)
Wpp Dc
2
=
Wc Dpp
2
Formula
Jednačina kontinuiteta

Dpp
2
Wc = Wpp
Dc
2
brzina u prigušnoj ploči
Formula
Brzina strujanja fluida u cevi

konstanta prigušne ploče
Razlika u pritisku fluida koja se meri U manometrom
Formula
2∆p
Wpp = k
ρ
Brzina fluida u prigušnoj ploči

V
Vs =
τ
Formule
Vs = Wc Sc
.
2∆p
Wpp = k
ρ
∆p = g ∆h (ρmt – ρf )
Dpp
2
Wc = Wpp
Dc
2
∆h
razlika pritisaka - merena U manometrom

Da bismo izmerili kapacitet centrifugalne pumpe
potrebno je da izmerimo
∆h
(visinsku razliku na U manometru)

Tabela potrebnih veličina
NAZIV VELIČINE VELIČINE VREDNOSTI
Prečnik cevi
Dc
4 cm
Prečnik prigušne ploče DPP
2 cm
Konstanta prigušne ploče k 0,6
Visinska razlika (U manometar)
∆h
Gustina manometarske tečnosti
ρmt
1500 kg/m3
Gustina fluida
ρf
1000 kg/m3
Nacrtati u dnevniku

DOMAĆI ZADATAK
Izračunati kapacitet centrifugalne pumpe

KAPACITET CENTRIFUGALNE PUMPE
Hemijsko prehrambena tehnološka škola

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1. KAPACITET CENTRIFUGALNE PUMPE JasminaVučković Ugledničas Hemijsko prehrambena tehnološka škola

2. Klipna pumpa Rotaciona pumpa Centrifugalna pumpa Transport fluida

3. Transport fluida Klipna pumpa Rotaciona pumpa Centrifugalna pumpa

4. Centrifugalna pumpa Nacrtati u dnevniku

5. Kapacitet Visina potiskivanja fluida Stepen korisnog dejstva Karakteristike centrifugalne pumpe

6. Kapacitet centrifugalne pumpe Koliko litara ? Za koliko vremena ?

7. Veličina koja definiše zapreminu fluida koja protekne u jedinici vremena zove se: ZAPREMINSKI PROTOK V Vs = τ Formula m3 s

8. jednak je Kapacitet centrifugalne pumpe ZAPREMINSKOM PROTOKU Vs = Wc Sc Formula brzina fluida u cevi površina poprečnog preseka cevi .

9. a) Čime treba izmeriti veličine da bi se izračunao KAPACITET?

10. Centrifugalna pumpa prigušna ploča U manometar

11. b) Koje veličine treba izmeriti da bi se izračunao KAPACITET?

12. Visinska razlika na U manometru: ∆h U manometar ∆

13. brzina strujanja fluida u cevi (određuje se preko jednačine kontinuiteta) Wpp Dc 2 = Wc Dpp 2 Formula Jednačina kontinuiteta

14. Dpp 2 Wc = Wpp Dc 2 brzina u prigušnoj ploči Formula Brzina strujanja fluida u cevi

15. konstanta prigušne ploče Razlika u pritisku fluida koja se meri U manometrom Formula 2∆p Wpp = k ρ Brzina fluida u prigušnoj ploči

16. V Vs = τ Formule Vs = Wc Sc . 2∆p Wpp = k ρ ∆p = g ∆h (ρmt – ρf ) Dpp 2 Wc = Wpp Dc 2 ∆h razlika pritisaka - merena U manometrom

17. Zaključak

18. Da bismo izmerili kapacitet centrifugalne pumpe potrebno je da izmerimo ∆h (visinsku razliku na U manometru)

19. Tabela potrebnih veličina NAZIV VELIČINE VELIČINE VREDNOSTI Prečnik cevi Dc 4 cm Prečnik prigušne ploče DPP 2 cm Konstanta prigušne ploče k 0,6 Visinska razlika (U manometar) ∆h Gustina manometarske tečnosti ρmt 1500 kg/m3 Gustina fluida ρf 1000 kg/m3 Nacrtati u dnevniku

20. DOMAĆI ZADATAK Izračunati kapacitet centrifugalne pumpe

21. KAPACITET CENTRIFUGALNE PUMPE Hemijsko prehrambena tehnološka škola

Editor's Notes

Kod rada bilo koje pumpe potrebno je utvrditi koliko litara tečnosti može da transportuje i za koliko vremena.

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