# Насосная азбука: основные понятия

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: #123.05.2014Andrei Ivanov

# , , , , . , Wilo 2

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#: , , , ..:, , / , 20 , , , 1 Q # , , Q

7: , - Q Q H + 1 # : , - , Q ,

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p , h : p = p0 + g h = p + g H #13 0 h . () . 0 , ()

:m1 = m2 = mi = const = r 1 1 S1 = r 2 2 S2 = r 3 3 S3 [/ ]

r 1 = r 2 = r 3 =const :

Q1 = Q2 = Q3 = const = 1 S1 = 2 S2 = 3 S3 [3 /c]# S1, S2 S3= D2/ 4 , 1 , 2 3 . [/], [3/]. [3/], [3/]. , .. , . , .

14

h 1-2

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= z2 + +

+

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gz1 +

= gz2 + +

+

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# H = p/ g =(p2 p1)/g , . : / ( 17398-78 : )Q = V, 3/. : 3/ .#

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NPSH

1 1 min#

#6 5 4 3 2 1

hh h.h = H = + ( p)/g + h h #23

Q1#

= + (p3 p1)/g = 0 HT = f(Q) = kQ2 QQ# HQ

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# : 1.1. - , , 1.2. : , , ! : 2.1. : , , 2.2. , , : , # . . - , .. .32 ( )HQ : 1 2 Q1 H1

1 ( 2 )Q2 H2 2# . , 1 2, .. Q1. , .. , : , 33 D2 .. (, 5% )

H m Q m/h D1Q1H1

D1D2Q2Q1D2~~D1H2H1D2~~D1 Q1Q2( )1D1D2H1H2( )2D1D2 Q2H2P2P1D2~~D1P2(1)P2(2)( )3D1D2 3 # , . 5% , !34

2 = 1 (n2/n1)2

Q2 = Q1(n2/n1)

2 = 1 (n2/n1)312 # , 35

p-c = const,

p-v = var

p-T = f(T)

Auto Manual

DDC (Direct Digital Control) # : 36 = const (Q)

(1)Q(1) = 7.2 3/ 1(1) = 390 (2)Q(2) = 2.8 3/ 1(2) = 230 1 = 1(1) - 1(2) = 160 #

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46 NPSH , NPSH (NPSH Required) NPSH ( ) # NPSH , ( , .) , NPSHA (NPSH Available) () #

NPSH NPSH > (0.5 1) NPSH = (p - p )/g + v 2/2g#

) NPSH = p - p = + g g h ) NPSH = p - p = 1 + g g h C) NPSH = p - p = 1 g g h NPSH p #

# - . ?

YY 35/150 2.2/2 (NPSH = 7 ) (t = 600 C) h = 2 . , , .. NPSH > NPSHNPSH :NPSH = (p - gh - p )/ g = = 10.2 2 0.2 ( t = 200 C) = 8 #

NPSH : NPSH = (p - gh - p )/ g = = 10.2 2 2 ( t = 600 C) = 6.2 , .. NPSH < NPSH , : 1. h , NPSH > NPSH ( );2. 200 ; 3. ( ).#

#

: 103/ 15 1. Wilo Select : 604 DM NPSH=3,6 ; 2. ! L = 25 L h = 2,5 h#

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71

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MVISE

MVI

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MHIL

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! MVIS#1. ( )2. .

# Economy1. CO 2-4 MHI /ER(SK)-EB-(WMS)-R2. CO 1-4 MVI /ER(SK)-EB-(WMS)-R 3. CO 1-4 MVIS/ER(SK)-EB-(WMS)-R

# WILO-Economy

Economy# Economy CO 2 MHI /ER-EB-WMS-R CO 2 MHI /SK-EB-R CO 3 MHI /ER-EB-R

# Comfort-Vario1. COR 1-4 MHIE (EM)/VR(GE)-EB-(WMS)-R2. COR 1-4 MVIE (EM)/VR(GE)-EB-(WMS)-R3. COR 1-4 MVISE(EM)/VR(GE)-EB-(WMS)-R4. COR 2-4 MHI (EM)/SKw-EB-(WMS)-R5. COR 2-4 MVI (EM)/SKw-EB-(WMS)-R6. COR 5-6 MVI /SKw-(WMS)-R7. COR 2-4 MVIS (EM)/SKw-EB-(WMS)-R8. COR 5-6 MVIS /SKw-(WMS)-R

#

Comfort-Vario

( ) 1 20/26 96 % .* : 5,0 = 0,1 5,0 = 2 % 0 (20/26 ) . 50 MVISE 65 MVIE/MHIE 1 2120100 80H[m] 60 40 20 0 0 2 4 6 8 10 12 14 16Q[m/]#

Comfort-Vario

COR 3 MHIEEM/VR-EB-R

COR 1 MHIEGE-RCOR 2 MHIE/VR-EB-RCOR 3 MHIE/VR-EB-RCOR 4 MHIE/VR-EB-R # ( ) 40, 2 . ( Poter PS120) .( ) 5 . ( Poter PS120) :2 . - .( )2 . - .( )1 . - 2 100 0-16 , .- ( ) 1- : ( ) 2 - 3 MVI BL, , , , , , . . : ( ) 2 - 3 MVI BL, , , , , , - , . . 1- (-). . 40 . .#

#93