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< >< Centrifugal Pump >. / TROUBLE /OPTION / . 2002.09.10. 1. . 1-1. . 1. . 2. . 3. . 4. . / / - PowerPoint PPT Presentation

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  • < >< Centrifugal Pump > / TROUBLE /OPTION / 2002.09.10

  • 1. 1-1. 1. 2. 3. 4.5.Sealing

    1()23()( :Air-Lift)()-

    - ()(Wing) V -,, ,- , ., ., , , / / () (None-Seal) , , , Un-balance, Balance Single, Double , ,

  • 1. 1-2. VOLUTE PUMPTURBINE PUMPVOLUTE PUMPTURBINE PUMP

  • 2. ()( = ) 76 76 . * : 13.6 ( 13.6)* (, , 10m .)? 76cmHg() = 76cm x 13.6 Aq(in Water)= 1033.6Aq = 10.33m ( 76 ): 760mmHg* . ( )

    * : ( )

  • 2. 60( 8m) ~ 45( 6m) : 8m ~ 6m , . ., .* : ** : * : Impeller ( ) Type & Type ( ) ,

  • 2. ABCABC(): , .

    : 1 (a) (C) (b) A B (a) (b) B C A , B A , (c)(d)

  • 3. Pa = 1.03kgf/cm2 = 10.3 H2OHsNPSHav = Pa-Vp-Hs-H Pa-Hl 10-H ( ENERGY) -- H1H2NPSHre = H1 + H2( FLANGE )-- NPSHav NPSHre ENERGY ENERGY .Q, H I/P NPSHav ( (H) .)3-1. NPSHre/NPSHav

    Sheet1

    HsNPSHav N

    900120018003600

    2m12100OKOKOKOK

    1m11100OKOKOKOK

    010100OKOKOKOK

    19100OKOKOKCavitation

    28100OKOKOKCavitation

    37100OKOKCavitationCavitation

    46100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    0.2420OKCavitationCavitationCavitation

    Sheet2

    Sheet1

    HsNPSHav N

    900120018003600

    2m12100OKOKOKOK

    1m11100OKOKOKOK

    010100OKOKOKOK

    19100OKOKOKCavitation

    28100OKOKOKCavitation

    37100OKOKCavitationCavitation

    46100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    ..100OKOKCavitationCavitation

    0.2420OKCavitationCavitationCavitation

    Q, H I/P

    NHI/P

    9003m

    12005m

    18007m

    36009m

    Sheet2

  • NPSHre = K1 x V2/2g + K2 x W2/2g ( )4/3K1 : K2 : S : (MAKER , 1200 ) : Cavitation NPSHav > NPSHre .NPSHreNPSHavCavitation HQ 3.

  • ===Specific Speed .n : (rpm)H : (m)Q : (/min)Ns : Ns Ns (600)H-Q Ns (600) Ns50100200400100030003-2. 3.

  • 3-3. Cavitation3. Cavitation () , , * ( )60 (0.2)* Cavitation * Cavitation NPSHav NPSHre (1+) 0.3 (, NPSHre x 0.3 0.5m)1) .2) .3) .4) 5) .6) Cavitation (Sus,...)

  • 3-4. Water Hammer3. Water Hammer : 1. : .2. (Valve) 3. , 1()2() : cf. => GD , . => Surge Tank , . ( ) ( )

  • 3-5. Surging 3. Surging : , , 1. H-Q : () (1 ) HQ2. , ( ) (2 ) ( 1)3. B 4. Q 1. H-Q : 3. (A )4. . 2. By-pass H-Q .( 2)AB or TankQ

  • 4. 4-1. 4-1-1. .4-1-6. . 3 4 . ( .) .4-1-3. (Stuffing Box) (Flushing) , .1) .2) . , .3) . 4-1-4. 1) . , .2) ( , ) .3) () , . 4-1-5. . 90 4 . 5/100mm .4-1-2. (ALIGNMENT) , 5/100mm .

  • 4. 4-2. 533.5-0.52.50.510m5mH=30H=30Q=10Q=102010HQ3010HQ103010HQ51. 2. 3. 5mH=20Q=103010HQ5812+-* . h(loss) = k (Q)

  • 4. 4-3. 4-3-1. HQRR ABC* : R R : A B* R Q H-Q .4-3-2. => * , R R* : 4-3-3. HQ AA => System 4-3-4. HQnnnRAAABB* H-Q -> A,A,A* -> A,B,B

  • 4. 4-3-5. H-Q * System (/) : * : 4-4. / 4-4-1., HQR RR22Haa* 2 , ? .R : R : 4-4-2. HQabc123ABCR *: A-> B-> C==> A-> B-> C

    * : a b cBCp

  • 4. 4-4-3. QHR A ZZHQR ZZA * A , .* A Z : * S A Z . : . T TTS1) : 2) R : A : B, C3) R Z : A : C( ) 1 B B . HQRRABZBACC()() B .->

    ( )4-4-4.

  • 4-5. 4-5-1. : . 90% .50 , .1) , , , .2) CAVITATION , . (m)40 ~ 50+ 150 ~ 60+ 260 ~ 70+ 3.570 ~ 80+ 580 ~ 90+ 790 ~ 95+ 995 ~ 100+ 11 80 4-5-2. . , 4-5-3. . 1) : 2) : 3) : 4) : 5) : 4-5-4. 4.

  • 1 A 1.2 : (1), A (1) : (10m), A (10m) : (1kgf/), A (1.2kgf/) : (1kW), A (1.2kW) : (50%), A (50%)4-5-5. 1) : 2) : ( , ) . : 2 LOSS() 2 LossLoss Loss1) , : 110V , : 220V : 440V, 3300V, 6600V Loss 10% .2) Torque (Kw) 3) 10% 4-5-6. 1) (): 1 2) 5% 3) 4-5-7. 4.

  • 5./ 5-1. , 150~300/d . ( APT : 900/d.1) .5-1-1. * 1 1 (250)* 1 : 4 Q : (/min)N : 5-1-2. Q : (/min)P :

  • 5./ 5-2. 5-2-1 P HdHpVdHaHpVsHs : : . ((Vd) (Vs) ) : . , . Hp 0 . :H = Ha + Hp + H + 2gVd2 :H = Ha + Hp + H + 2g(Vd - Vs)2H : Ha : Hp : Hp = Hp- HpH : ( ) (H) H = Hf() + Hx() 100m

  • 5./ 5-2-2. 100m 5-2-3. , 5-2-4. 1) - : 22m- : 0.6/min- : 26.5m ( : 80)- : 4- (80 , , ) P4m1m2.5m2m1m16m19m22m) Ha = 22 m, Hp = 0, Hv=V/2*g=(Q/A)/2*g = 0.2 m) Hf + Hx = 26.5m(4+1+2.5+1+16+2) + 30.33m(3*4+12+0.63+5.7) = 56.8m) 100m = 8m 50m 8 x 0.568 x 1.5 = 6.8 m ( : 1.5) H = Ha + Hp + Hv + (Hf+Hx) = 22 + 0 + 0.2 + 6.8 = 29m

  • 5./ 5-3. 5-3-1 ) User Spec. : 0.8 / min : 97 m : 22 kw Pump 5-3-2 Catalogue PMT-6507 Model .5-3-3 Impeller Cutting Size . Test Report Data

    Impeller D2() : 206 mm (O.D1)8-5 Test Report

    Impeller 206 mm 0.8 / min 30 kw

    Cutting .

    Impeller 206 mm 195 mm (Q), (H) (O.D2 : Data) Q2, Q3 H2, H3 8-5 Test Report SPEC (2) (1) . Spec. 0.8 / min Impeller O.D2 = 195 mm 93.6m .(0.9-0.72)( 81.96-102.9) x (0.9-0.8)= 93.6m H (m) Q( / min )0.72 / min * 102.9 M 0.90 / min *81.96 M0.8 / min * 114.8 M1.0 / min * 91.47 M Q = Q 1 * ( )

    Q 2 = 0.8 * ( ) = 0.72

    Q 3 = 1.0 * ( ) = 0.90 H = H * ( )

    H 2 = 114.8 * ( ) = 102.9

    H 3 = 91.47 * ( ) = 81.96O.D1O.D2 2O.D1O.D2281.96 -

  • 5./ Impeller O.D2 198 mm

    0.8 / min 98.6m User Spec. .

    + 6 % ~ 3 % .

    5-3-4 (BHP)

    PUMP () : 64 %( Test Report 64% )

    (s.g) : 1

    0.163 * (Q : / min ) * (H : M) * (s.g) BHP (kw) = Pump () 0.163 * 0.8 / min * 97 M * 10.64= 19.76 kw => 22 kw 5-4-1 10% . 19.76*1.1=21.7kw 22kw . 5-4. / ( , )1) 0.64 / min, 70m 50Hz . Q 2 = ( ) x Q1

    H2 = ( ) x H1N1N2N1N225-4-2 0.64 / min, 70m0.77 / min, 102m60Hz (1750/1450) x 0.64 = 0.77(1750/1450)2 x 70 = 102(1450rpm)(1750rpm)

  • 5./ 0.77 / min, 102m (Catg) => PMT-6507

    DATABOOK 0.77 / min, 102m => 61%

    61% / ( 3~5% )

    ==> (0.163 x 0.64 x 70) / 0.56 = 13.04Kw

    10% 13.04 x 1.1 = 14.344Kw =>15Kw

    PMT-6507, 15Kw * 4P * 50Hz .

    2)

    0.77 / min, 102m 4P =>2P 0.64 / min, 70m0.38 / min, 24.6m4P 60Hz (1750/2950) x 0.64 = 0.38(1750/2950)2 x 70 = 24.6(2950rpm)(1750rpm)0.38 / min, 24.6m (Catg) => PSV-6550D

    DATABOOK 0.38 / min, 24.6m => 51%

    51% / ( 3~5% )

    ==> (0.163 x 0.64 x 70) / 0.46 = 15.87Kw

    10% 15.87 x 1.1 = 17.46Kw =>18.5Kw

    PSV-6550D, 18.5Kw * 2P * 50Hz .

  • 5./ 1) ( CAPACITY ) 2) ( POWER ) / s / hr / min gal / minft / hrft /min10.277816.6660.063090.0078650.471923.6160.00.22710.028321.69890.0600.01666810.00378240.00047190.0283215.85144.4032264.183310.12477.4851127.1435.3172119.1838.0208160.021.1920.588635.31650.133680.016681 PSHPkwMinft11.01431.35960.985911.34050.73550.746110.02540.304839.370081123.280840.083331 3) ( LENGTH )5-6. 5-5. =120 x 4P, 60Hz => (120 x 60) / 4 = 1800rpm ( 1750rpm )

    4P, 50Hz => (120 x 50) / 4 = 1500rpm ( 1450rpm )

    2P, 60Hz => (120 x 60) / 2 = 3600rpm ( 3550rpm )

    2P, 50Hz => (120 x 50) / 2 = 3000rpm ( 2950rpm )

    6P, 60Hz => (120 x 60) / 6 = 1200rpm ( 1150rpm )

    6P, 50Hz => (120 x 50) / 6 = 1000rpm ( 950rpm )

  • 1) : .2) : 3) : 8D, 5D

    4) 4-1) --> 4-2) --> (, , , Cavitation)6. TROUBLE 1) : .2) : 2 .3) : Cutting .