Download - Voith Turbo - Basics
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Basics
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Föttinger Principle
hydro-dynamiquecoupling
Motor
TurbinePump
OperatingPrinciple of the Voith Turbo Coupling
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Oil flow Oil flow
Turbine wheelPump impeller
Föttinger Principle
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svtl.exe
Variable Speed Couplings
The fill level of operating fluid can be varied during operation between „full“ and drained, thus enabling step-less speed control
Benefits- Proven design- Low capital costs- Unsensitive to
environmental conditions- Almost maintenance free
Animation scoop tube
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Variable Speed Coupling Types
SVN
SVTW
SVNk
SVL Modular
SVNLG
MDC
SVTL SVNL
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SVTL
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Variable Speed Coupling Type SVTL
Selfsupporting design of tunnel construction
Compact design Economic solution
Field of application: - Combined cycle power station- Marine technology- Iron and steel industry- Raw material technology- Chemical and petro-chemical
industry- District heating plants- Power stations
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Variable Speed Coupling Type SVTL
Simplified longi-tudinal section
1 Pump wheel2 Turbine wheel3 Shell4 Scoop tube
housing5 Oil sump6 Oil circulation
pump7 Scoop tube8 Working oil
cooler
6
5
1 2 3 4 7
8
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Performancecharacteristicsvariable-speedturbo couplingtype SVTL
Variable Speed Coupling Type SVTL
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SVNL
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Variable Speed Coupling Type SVNL
Ball and roller bearings - Heavy duty design- High power rating- Easy access through
horizontally split housing
Field of application:- Iron and steel industry- Raw material technology- Chemical and petro-chemical industries- District heating plants- Power stations
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Variable Speed Coupling Type SVNL
Simplified longi-tudinal section
1 Pump wheel2 Turbine wheel3 Shell4 Scoop tube
housing5 Oil sump6 Oil circulation
pump7 Scoop tube8 Working oil
cooler
1
6
5
2
4
8
3 7
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Performancecharacteristicsvariable-speedturbo couplingtype SVNL
Variable Speed Coupling Type SVNL
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SVNLG
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Variable Speed Coupling Type SVNLG
Friction bearings. Housing horizontally split
- Almost no wear- Higher power rating- Load free start- External lube oil supply
Field of application:- Marine technology- Chemical and petro-chemical industries- District heating plants- Power stations
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Variable Speed Coupling Type SVNLG
Simplified longi-tudinal section
1 Pump wheel2 Turbine wheel3 Shell4 Scoop tube
housing5 Oil sump6 Oil circulation
pump7 Scoop tube8 Working oil
cooler
6
1
5
8
2 3 7
4
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P Pump ImpellerT Turbine WheelS Scoop Chamber1 Input2 Output3 Oil Tank4 Scoop Tube Housing5 Scoop Tube6 Filling Pump7 Primary Shaft8 Secondary Shaft9 Relative Bearing10 Collar End Bearing11 Sleeve Bearing12 Oil Cooler13 Double Filter14 Auxiliary Lube Oil Pump
Variable Speed Coupling Type SVNLG
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Performancecharacteristicsvariable-speedturbo couplingtype SVNLG
Variable Speed Coupling Type SVNLG
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Operating rangesof adjustablecouplings
1 Rising torque2 Constant
torque3 Decreasing
torque4 Parabolic
torque5 Decreasing
torqueI, IV Starting rangeII Control rangeIII Overload range
Hydrodynamic Couplings
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Position controlcircuit
Components:- Position
controller- Actuator for
continuouscontrol
- Positionfeedback
drivenmachine
motor
position controller
scoop tube adjustment
actualvalue
set value4-20 mA
actual scoop tube setting value4-20 mA
Integration of the Variable Speed Coupling into a control circuit
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Process controlcircuit
Components:- Position
controller- Process
controller
drivenmachine
motor
position controller
actual scoop tube setting valueset value
actual value
process controller
actualvalue
pole wheelwith pick-up
speedmeasurementsconverter
speedindicator
set value 4-20 mA
actual process value
nominal value 4-20 mA
Integration of the Variable Speed Coupling into a control circuit
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Geared Variable Speed Couplings
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3 MotorGearedVariable-SpeedCoupling
DrivenMachine
Motor
DrivenMachine
Gearbox
VariableSpeedCoupling
Geared Variable Speed CouplingsPrinciple
Start Animation
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Geared Variable Speed Coupling Types
R...GS
R...KGS
R...B
R...A
RK Modular
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Geared Variable Speed Couplings
For stepless speed control of various driven machines upto highest powers:
Units : over 4 000Power: up to 18 202 kWSpeed: up to 14 822 rpm
Applications:Compressors, Boiler feed pumps, Pipeline pumps, Injectionpumps, etc.
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Geared Variable Speed CouplingsWorking Principle
1
2
3
4
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1 Gear stage2 Hydrodynamic variable speed
coupling3 Scoop tube4 Electro-hydraulic positioning
control (VEHS)5 Working oil cooler6 Lube oil cooler7 Main lube oil pump8 Oil circulation control valve9 Working oil pump10 Auxiliary lube oil pump11 Duplex filter12 Oil reservoir
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GearboxDouble helical gearing with large tooth width in order to reduce gear center distances. Gears are designed as single-piece forging. The pinion is integral with the shaft and the gear wheel shrink fitted.
CouplingRunners made from high alloy steels for highest circumferential speeds.
Scoop tubeScoop tube operated by an electro-hydraulic actuator (VEHS) or Pneumatic or Electrical
Oil circuitSeparate oil circuits with coolers for working oil and lube oil. Closedworking oil circuit with mechanically operated oil flow control valve
PumpsMechanically driven working oil and lube oil pump. Electrically driven AOP
A Proven PrincipleNumerous Improvements
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A Proven Principle Numerous Improvements
Clear advantages• Higher technical flexibility• Optimum adaptations a result of the different possible combinations between gearbox and coupling• Compact design• Short delivery Time due to standardized modules• Compact actuator with integrated positioner for direct control (4 - 20 mA)• Integrated rapid startup device• Easier maintenance as a result of modular design
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Power savings andextension of drivenmachine life comparedto throttle control:lower operating costs
Robust and compactdesign
Relieved motor start-upand smooth accelerationof heaviest masses
Long service life
Precise load adaptationof driven machines dueto the high controlaccuracy and fastreaction times
Reliability > 99,9%(Evaluation based onunits in operation)
Vibration damping
Easy maintenance,low maintenance costs
Geared Variable Speed CouplingAdvantages
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Geared Variable Speed Couplings Type RKGS
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Geared Variable Speed Coupling Type R..KGS
1 Gear2 Variable-speed
turbo coupling3 Oil pump4 Scoop tube
(adjustable)
1
2
3
4
1
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Geared Variable Speed CouplingType R..KGS
A step up gear islocated both at theinput and outputside
High power at high speed
For particularly highoutput speeds, e.g. compressors
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Power Applications
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Fluid Couplings in a Thermal Power Plant
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Features and Benefits
- Power savings and extension of driven machine life compared to throttle control
- Precise load adaptation of driven machines
- Highest reliability
- Vibration damping
- Relieved motor start-up and smooth acceleration of heaviest masses
- Robust and compact design
- Easy maintenance, low maintenance costs
- Long service life
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Main Boiler Feed Pump
2 x 21990 kW (Overload)4904 rpm
Scholven Power Plant
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Power Applications
Boiler feed pumpCoal-fired power plant Germany
Variable speed coupling
Type: SVTLPower: 1250 kWSpeed: 2950 rpm
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Fan drive Korea
Variable speed turbo coupling
Type:750 SVTL 21.2-6,3
Power Applications
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Boiler feed pumpCombined cycle Power plantUSA
Variable speed coupling
Type SVNL 33.2
Power Applications
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Boiler feed pumpCombined Cycle Power PlantUSA
Variable Speed Coupling
Type SVNL 33.2
Power Applications
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Cogen South P.S.I.D Fan drive
Voith Variable Speed coupling
Type:1000 SVNL 21-18,5.3
Power Applications
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Boiler feed pumpPower station Mexico
Geared variable speed coupling
Type: R15K400 MPower: 2360 kWSpeed: 6184 rpm
Power Applications
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Boiler feed pump Germany
Geared variable speed coupling
Type:R14 K 400 M invertPower: 387 kWInput Speed: 1491 rpmOutput Speed: 4069 rpm
Power Applications
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Boiler feed pumpGermany
Geared variable speed coupling
Type: R19 KGSPower: 9860 kWSpeed: 4860 rpm
Power Applications
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Type: SVTLUnits: 1
Application :Boiler fan / ID fan
4. Fans
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Type: R...AUnits: 1Power: 1100 KWSpeed: 500 rpm
Application:Coal millGreece
5. Coal Mills
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• All the projects which are bieng set up by Chinese EPC companies in India are equipped with Voith couplings for BFP drives.•Most of the I.D.Fan drives are equipped with Voith couplings.• Some of the references of projects
•WBPDCL – Sagardighi ( 2X300MW) – BFP + ID Fans•DPL - Durgapur (1X300 MW) – BFP + ID Fans•HPGCL – Yamunanagar (2 X 300 MW) - BFP•JSW – Bellary ( 3X300 MW) – BFP + ID Fans•JSW – Ratnagiri (4 X 300 MW) – BFP + ID Fans•KSK – MPPL ( 1X 135 MW)- BFP•Vedanta – Jharsuguda ( 8 X135 MW), – BFP + ID Fans •Vedabta – Jharsuguda (6X600 MW) - BFP
Sucess of Voith with Chinese EPC companies for Indian Projects
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•LANCO- Amarkantak ( 2X300MW) – BFP• LANCO- Anpara C ( 2X600MW) – BFP• LANCO- Nagarjuna ( 2X600MW) – BFP •Adani - Tunda (2X300 MW) – BFP •JSW – Barmer (8X 135 MW) - BFP•JSPL – Angul & Raigarh ( 10X135 MW) – BFP + ID Fans ( under discussion )•KSK – WPPL (4 X 135 MW) – BFP + ID Fans ( under discussion )•Reliance - Rosa ( 2X 300 MW)- BFP + ID Fan ( Under discussion )•Essar – Mahan ( 2 X 600 MW), – BFP etc.
Sucess of Voith with Chinese EPC companies for Indian Projects
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