degree work overview (katja maslova)
TRANSCRIPT
![Page 1: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/1.jpg)
11
Designing of submarine ballast-Designing of submarine ballast-drainage centrifugal pump with low drainage centrifugal pump with low
noise & vibration levelnoise & vibration level
Ballast-Drainage System
![Page 2: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/2.jpg)
22
ContentContent
Piping & Instrumentation DiagramPiping & Instrumentation Diagram 44 Pump Unit PerformancePump Unit Performance 55 Impeller ProfileImpeller Profile 66 Impeller detail drawingImpeller detail drawing 77 Diffuser ProfileDiffuser Profile 88 General ArrangementGeneral Arrangement 99 Cross Sectional DrawingCross Sectional Drawing 1111 Dynamic Balancing of the Rotor AssemblyDynamic Balancing of the Rotor Assembly 1313 Researching PartResearching Part 1414 Balancing of Axial & Radial ForcesBalancing of Axial & Radial Forces 1717 Vibration & Noise ProtectionVibration & Noise Protection 1818 NPSHr ReductionNPSHr Reduction 1919
![Page 3: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/3.jpg)
33
Content (continuation)Content (continuation)
Impeller Fabrication MethodImpeller Fabrication Method 2020 Impeller MachiningImpeller Machining 2121 Adapter for Impeller MachiningAdapter for Impeller Machining 2222 Manufacturing CostsManufacturing Costs 2323 ConclusionsConclusions 2424
![Page 4: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/4.jpg)
44
Piping & Instrumentation DiagramPiping & Instrumentation Diagram
4 – Gate valve 5 – Ballast system piping 6 – Sea inlet 7 – Sluice valve 8 – Filter (mud box) 9 – Stop valves (switchgear)10 – Ballast pump11 – Drainage pump12 – Gate valve13 – Separator 14 – Hand pump15 – Protection cell16 – Drainage piping
1 – Suction filter2 – Mud box3 – Nonreturn valve
![Page 5: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/5.jpg)
55
Pump Unit PerformancePump Unit Performance
Head = 30m Capacity = 300m3/h NPSHa = 5m NPSHr = 0,7m Ns = 2935 Nssimpeller = 13010 Rated Power = 45,93kW E-motor Power = 55kW Speed = 1500rpm Efficiency = 55%
![Page 6: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/6.jpg)
66
Impeller ProfileImpeller Profile
Vanes profile
Velocity vector
diagram (outlet)
Velocity vector
diagram (inlet)
![Page 7: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/7.jpg)
77
Impeller detail drawingImpeller detail drawing
Balancing holes
Space vanes
Back wear ring design
![Page 8: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/8.jpg)
88
Diffuser ProfileDiffuser Profile
Back vanes
Inlet
Outlet
![Page 9: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/9.jpg)
99
General ArrangementGeneral Arrangement
Gap between pump casing and mounting surface
![Page 10: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/10.jpg)
1010
General ArrangementGeneral Arrangement
Elastomer between pump casing supports and
mounting surface
![Page 11: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/11.jpg)
1111
Cross Sectional DrawingCross Sectional Drawing
Sleeve bearings
Axial-vortex stage
Balance drum
![Page 12: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/12.jpg)
1212
Cross Sectional DrawingCross Sectional DrawingProvisions for vibration
measurement
Junction box
Cable glands
![Page 13: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/13.jpg)
1313
Dynamic Balancing of the Rotor AssemblyDynamic Balancing of the Rotor Assembly
![Page 14: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/14.jpg)
1414
Researching PartResearching Part
Inducer Axial-Vortex Stage
NPSHr & Noise level
![Page 15: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/15.jpg)
1515
Researching PartResearching Part
Inducer• Amount of back flow is bigger• Noise level is higher• NPSHr is higher
Axial-Vortex Stage • Amount of back flow is less• Noise level is lower• NPSHr is lower
![Page 16: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/16.jpg)
1616
Researching PartResearching Part
NPSHr & Noise level 1 – Impeller 2 – Inducer 3 – Axial-Vortex Stage
First acoustical positive suction head
Second acoustical positive suction head
Net positive suction head (Head drop by 3%)
Net positive suction head (Head drop by 25%)
![Page 17: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/17.jpg)
1717
Balancing of Axial & Radial ForcesBalancing of Axial & Radial Forces
Axial loadAxial load• Back impeller wear ringBack impeller wear ring• Impeller balancing holesImpeller balancing holes• Balancing drumBalancing drum• Rotor weight reductionRotor weight reduction
Radial loadRadial load• Diffuser designDiffuser design
![Page 18: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/18.jpg)
1818
Vibration & Noise ProtectionVibration & Noise Protection
Static balancing of rotate partsStatic balancing of rotate parts Dynamic balancing of the rotor assemblyDynamic balancing of the rotor assembly Sleeve bearingsSleeve bearings Low number of revolutionsLow number of revolutions Low NPSHrLow NPSHr Gap between pump casing and mounting Gap between pump casing and mounting
basebase Elastomer between casing supports and Elastomer between casing supports and
mounting basemounting base Flexible suction & discharge transition Flexible suction & discharge transition
pieces pieces
![Page 19: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/19.jpg)
1919
NPSHr ReductionNPSHr Reduction
Using of Axial-Vortex StageUsing of Axial-Vortex Stage Reducing number of revolutionsReducing number of revolutions Increasing impeller eye squareIncreasing impeller eye square
![Page 20: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/20.jpg)
2020
Impeller Fabrication MethodImpeller Fabrication Method
Casting Rotary machining (CNC unit) Turning
Turn broaching Turning Radial drilling
![Page 21: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/21.jpg)
2121
Impeller MachiningImpeller Machining
Radial drilling
Rotary machining (CNC unit) Turn broaching
![Page 22: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/22.jpg)
2222
Adapter for Impeller MachiningAdapter for Impeller Machining
![Page 23: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/23.jpg)
2323
Manufacturing CostsManufacturing Costs
C1 – Material cost C2 – Buy-out cost C3 – Factory overheads C4 – Salary for involved employees
C1 = 43,7% C2 = 21,3%
C3 = 11,6%
C4 = 8,7%
C5 = 5,8%C6 = 3,6%
C7 = 2,3%
C8 = 3%
C5 – Equipment maintenance cost C6 – Shop overheads C7 – Social insurance for involved employees C8 – Out-of-process costs
![Page 24: Degree Work Overview (Katja Maslova)](https://reader033.vdocument.in/reader033/viewer/2022042819/55c5dba8bb61ebda3b8b45a2/html5/thumbnails/24.jpg)
2424
ConclusionsConclusions
Noise & Vibration Level ControlNoise & Vibration Level Control Weight & Overall Dimensions ControlWeight & Overall Dimensions Control High ReliabilityHigh Reliability Manufacturing Cost ReductionManufacturing Cost Reduction Easy Maintenance & RepairEasy Maintenance & Repair InterchangeabilityInterchangeability Environment ProtectionEnvironment Protection