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Centrifugal Pumps Mechanical Design ANSYS analysis ...

Centrifugal Pumps Mechanical DesignANSYS analysis Vibration in Vertical PumpsS rgio Loeser -SulzerPumpsBrazilKarinKieselbach-Sulzer PumpsHQ SwitzerlandProf. Dr. Miguel Mattar Neto -IPEN PRESENTATION PARTS Sulzer , Sulzer Pumps and Sulzer Pumps in Brazil Pumps and Vertical Pumps Case Study: Vertical Pump in VCP 3 Lagoas MS ConclusionSulzer and Sulzer PumpsSulzer marketSulzer Brasil -Jundia Office building 2500m 2 storiesFactory 7200m 5 bays 45t lifting Storage 1400m ComponentMachining 2000 m Foundry 3500 m Sulzer Brasil -2009 Oil & Gas 26%Orders receivedNew Pumps 360 BRL millionHPI36%PG27%WW8%Sulzer Pumps Products except VerticalOverhungHorizontalFoot MountedCPT, ZCenterlineMountedCAP, OHH, OHLV erticalIn-LineOHVEnd-SuctionZAVB etween Bearings1 & 2 stagesAxially SplitSMN, SMH, HSB, HPDM, ZPPR adiallySplitBBT, BBS, BBT-D, CD, BBS-SCMultistageAxially SplitMSD, MSE.

Sulzer Pumps Products –except Vertical Overhung Horizontal Foot Mounted CPT, Z Centerline Mounted CAP, OHH, OHL Vertical In-Line OHV End-Suction ZAV Between Bearings 1 & 2 stages

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Transcription of Centrifugal Pumps Mechanical Design ANSYS analysis ...

1 Centrifugal Pumps Mechanical DesignANSYS analysis Vibration in Vertical PumpsS rgio Loeser -SulzerPumpsBrazilKarinKieselbach-Sulzer PumpsHQ SwitzerlandProf. Dr. Miguel Mattar Neto -IPEN PRESENTATION PARTS Sulzer , Sulzer Pumps and Sulzer Pumps in Brazil Pumps and Vertical Pumps Case Study: Vertical Pump in VCP 3 Lagoas MS ConclusionSulzer and Sulzer PumpsSulzer marketSulzer Brasil -Jundia Office building 2500m 2 storiesFactory 7200m 5 bays 45t lifting Storage 1400m ComponentMachining 2000 m Foundry 3500 m Sulzer Brasil -2009 Oil & Gas 26%Orders receivedNew Pumps 360 BRL millionHPI36%PG27%WW8%Sulzer Pumps Products except VerticalOverhungHorizontalFoot MountedCPT, ZCenterlineMountedCAP, OHH, OHLV erticalIn-LineOHVEnd-SuctionZAVB etween Bearings1 & 2 stagesAxially SplitSMN, SMH, HSB, HPDM, ZPPR adiallySplitBBT, BBS, BBT-D, CD, BBS-SCMultistageAxially SplitMSD, MSE.

2 MSD2 RadiallySplit-Single casingMBN, MC, MD, MERadiallySplit-Double Casing -BarrelGSG, CP, HPcp, HPTS ulzer Vertical PumpsSingle CasingThroughColumnDiffuserTMCBK, BKn, BSmSJT, SJM, JTSV oluteBSDA xial FlowBPnSJPS eparate DischargeLine-shaftZNCantileverNKPD ouble CasingDiffuserTTMCBKC, SJDVCRV oluteBDCS ulzerVertical PumpMotorDischarge headShaft and CouplingBaseplateColunmBowlsBellStrainer Sulzer Vertical Pumps Main TypesSJTT urbine Ns 1800 < 5000nq 35 < 110 SJMM ixed FlowNs 5800 < 8300nq 113 < 161 SJPA xial FlowNs ~ 14,500nq ~ 280 Vertical Pumps -HydraulicsImpeller typesCLOSEDSEMI-CLOSEDOPENV ertical Pumps -HydraulicsTypes according to flow typeAxialTurbineMixedSulzer Vertical Pumps 3 main partsSUCTION -BOWLCOLUMNDISCHARGE HEADV ertical Pumps Field InstallationSulzer Vertical Pump BSm at testCooling SystemSulzer Vertical Pump BSm at fieldBSm 1400-1s 36'000 m3/h at 14m310 RPM, 1520 kWDiam.

3 Discharge2000mmVertical Pump Static AnalysisLoads and Restraints: Internal pressure, applied on "wet surface" Pressure on "cover faces" is applied as equivalent axial force Motor torque Nozzle loads Rotor mass at axial bearing Restraints at bolt locations and pipe Example: S o Francisco, BKn2000-1800-1s/030 Vertical Pump Static AnalysisAllowable Membrane Stress: Primary Membrane Stress Local Primary Membrane Stress Secondary Membrane + Bending Stress Example: S o Francisco, BKn2000-1800-1 ,, allmeq, allmeq, allmeq,3 Case Study -Vertical Pump in 3 Lagoasm [kg]Ip[kgm2]It[kgm2] ' DataGeometryGeneral DimensionsDnom= 508 [mm]Height of Column Pipe = 14500 [mm]Height of Motor Stool = 1985 [mm]Height of Motor = 2500 [mm]Total Height = 18985 [mm]Performance DataRated Flow2218 [m3/h]Rated Head49 [m]Rated Speed1186 [rpm]Pumped FluidWaterMasses and InertiasMaterial DataPipes:A36 Flanges:A36 Motor Stool:A36 Pump dataImpeller diameter: 567mm -nq 47 Weights (kg):Pump: 5400 -Baseplate: 256 Motor: 2790 -Total: 8446 Shaft diameter: 70mm Bearing span.

4 2000mm Bearing span according to API 610: max2250mmCase Study -Vertical Pump in 3 LagoasPumps A and B speed 100% = 1186rpm = 19,8Hz => 2218m3/h 49m 370kW Pump C speed 70% -80% -90% => 13,8Hz -15,8Hz -17,8Hz (1067rpm) => 1035m3/h1186rpm1067rpm1186rpm830rpmCase Study -Vertical Pump in 3 LagoasPump Min. Operating Water LevelRising Pipe Natural Frequencies [Hz]about Y-axisabout X-axisFigure1. Mode (1stclassic bending mode) B-12. Mode (2ndclassic bending mode) B-23. Mode (3rdclassic bending mode) B-34. Mode (4thclassic bending mode) B-4 Model: without shaft, sleeves and intermediary rubber mass added to modelCampbell Diagram051015202530354002004006008001000 12001400160018002000 Speed [rpm]Frequency [Hz]Margin 1st excitation frequency1X Excitation FrequencyPendulum2nd Bending Mode3rd Bending Mode4th Bending ModeWithoutshaft, sleeves and rubber bearingsCase Study -Vertical Pump in 3 LagoasPump Min.

5 Operating Water LevelRising Pipe Natural Frequencies [Hz]about Y-axisabout X-axisFigure1. Mode (1stclassic bending mode) C-12. Mode (2ndclassic bending mode) C-23. Mode (3rdclassic bending mode) C-34. Mode (4thclassic bending mode) C-4 Model: with shaft, sleeves and intermediary rubber bearings, but not Rotordynamic effect includedWater mass added to modelCampbell Diagram051015202530354002004006008001000 12001400160018002000 Speed [rpm]Frequency [Hz]Margin 1st excitation frequency1X Excitation Frequency1st Bending Column2nd Bending Column3rd Bending Column4th Bending ColumnWithshaft, sleeves and rubber bearingsCase Study -Vertical Pump in 3 LagoasVibration at Column [mm]Amplitude [mm/s]80% xdir90% xdir100% xdir80% ydir90% ydir100% ydirVibration measurements at field.

6 No resonance at 90% rated speed, but high vibration at 80% rated speedCase Study -Vertical Pump in 3 LagoasTwo possible solutions:1)Increase Natural frequency from ~14Hz to above 23Hz, by adding ribs in the column in order to increase stiffness 2)Modify Mode shape, by fixing column to concrete structureSolution 1 Solution 2 Campbell Diagram051015202530354002004006008001000 12001400160018002000 Speed [rpm]Frequency [Hz]Margin 1st excitation frequency1X Excitation FrequencyPendulum2nd Bending3rd Bending4th BendingSolution 1 Natural frequency increased , but not enoughNew Mode ShapesSolution 2 Case Study -Vertical Pump in 3 :guidelinestoSales=>orientationtocustome rincaseofpumpsinparallelwithdifferentspe eds.

7 >closesttoreality,thatmeans,enoughinform ationthatexplainwhatishappeningatfield; :notevertoincrease, Study -Vertical Pump in 3 LagoasObrigadoDankeGraciasThank youMerciGrazi


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