Basics

2 | B

asic

s | 2

0. A

pr 2

023

Föttinger Principle

hydro-dynamiquecoupling

Motor

TurbinePump

OperatingPrinciple of the Voith Turbo Coupling

3 | B

asic

s | 2

0. A

pr 2

023

Oil flow Oil flow

Turbine wheelPump impeller

Föttinger Principle

4 | B

asic

s | 2

0. A

pr 2

023

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

5 | B

asic

s | 2

0. A

pr 2

023

Variable Speed Coupling Types

SVN

SVTW

SVNk

SVL Modular

SVNLG

MDC

SVTL SVNL

SVTL

7 | B

asic

s | 2

0. A

pr 2

023

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

8 | B

asic

s | 2

0. A

pr 2

023

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

9 | B

asic

s | 2

0. A

pr 2

023

Performancecharacteristicsvariable-speedturbo couplingtype SVTL

Variable Speed Coupling Type SVTL

SVNL

11 |

Bas

ics

| 20.

Apr

202

3

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

12 |

Bas

ics

| 20.

Apr

202

3

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

13 |

Bas

ics

| 20.

Apr

202

3

Performancecharacteristicsvariable-speedturbo couplingtype SVNL

Variable Speed Coupling Type SVNL

SVNLG

15 |

Bas

ics

| 20.

Apr

202

3

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

16 |

Bas

ics

| 20.

Apr

202

3

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

17 |

Bas

ics

| 20.

Apr

202

3

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

18 |

Bas

ics

| 20.

Apr

202

3

Performancecharacteristicsvariable-speedturbo couplingtype SVNLG

Variable Speed Coupling Type SVNLG

19 |

Bas

ics

| 20.

Apr

202

3

Operating rangesof adjustablecouplings

1 Rising torque2 Constant

torque3 Decreasing

torque4 Parabolic

torque5 Decreasing

torqueI, IV Starting rangeII Control rangeIII Overload range

Hydrodynamic Couplings

20 |

Bas

ics

| 20.

Apr

202

3

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

21 |

Bas

ics

| 20.

Apr

202

3

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

Geared Variable Speed Couplings

23 |

Bas

ics

| 20.

Apr

202

3 MotorGearedVariable-SpeedCoupling

DrivenMachine

Motor

DrivenMachine

Gearbox

VariableSpeedCoupling

Geared Variable Speed CouplingsPrinciple

Start Animation

24 |

Bas

ics

| 20.

Apr

202

3

Geared Variable Speed Coupling Types

R...GS

R...KGS

R...B

R...A

RK Modular

25 |

Bas

ics

| 20.

Apr

202

3

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.

26 |

Bas

ics

| 20.

Apr

202

3

Geared Variable Speed CouplingsWorking Principle

1

2

3

4

11

6

7

8

9

10

12

5

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

27 |

Bas

ics

| 20.

Apr

202

3

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

28 |

Bas

ics

| 20.

Apr

202

3

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

29 |

Bas

ics

| 20.

Apr

202

3

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

Geared Variable Speed Couplings Type RKGS

31 |

Bas

ics

| 20.

Apr

202

3

Geared Variable Speed Coupling Type R..KGS

1 Gear2 Variable-speed

turbo coupling3 Oil pump4 Scoop tube

(adjustable)

1

2

3

4

1

32 |

Bas

ics

| 20.

Apr

202

3

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

Power Applications

34 |

Bas

ics

| 20.

Apr

202

3

Fluid Couplings in a Thermal Power Plant

35 |

Bas

ics

| 20.

Apr

202

3

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

36 |

Bas

ics

| 20.

Apr

202

3

Main Boiler Feed Pump

2 x 21990 kW (Overload)4904 rpm

Scholven Power Plant

37 |

Bas

ics

| 20.

Apr

202

3

Power Applications

Boiler feed pumpCoal-fired power plant Germany

Variable speed coupling

Type: SVTLPower: 1250 kWSpeed: 2950 rpm

38 |

Bas

ics

| 20.

Apr

202

3

Fan drive Korea

Variable speed turbo coupling

Type:750 SVTL 21.2-6,3

Power Applications

39 |

Bas

ics

| 20.

Apr

202

3

Boiler feed pumpCombined cycle Power plantUSA

Variable speed coupling

Type SVNL 33.2

Power Applications

40 |

Bas

ics

| 20.

Apr

202

3

Boiler feed pumpCombined Cycle Power PlantUSA

Variable Speed Coupling

Type SVNL 33.2

Power Applications

41 |

Bas

ics

| 20.

Apr

202

3

Cogen South P.S.I.D Fan drive

Voith Variable Speed coupling

Type:1000 SVNL 21-18,5.3

Power Applications

42 |

Bas

ics

| 20.

Apr

202

3

Boiler feed pumpPower station Mexico

Geared variable speed coupling

Type: R15K400 MPower: 2360 kWSpeed: 6184 rpm

Power Applications

43 |

Bas

ics

| 20.

Apr

202

3

Boiler feed pump Germany

Geared variable speed coupling

Type:R14 K 400 M invertPower: 387 kWInput Speed: 1491 rpmOutput Speed: 4069 rpm

Power Applications

44 |

Bas

ics

| 20.

Apr

202

3

Boiler feed pumpGermany

Geared variable speed coupling

Type: R19 KGSPower: 9860 kWSpeed: 4860 rpm

Power Applications

45 |

Bas

ics

| 20.

Apr

202

3

Type: SVTLUnits: 1

Application :Boiler fan / ID fan

4. Fans

46 |

Bas

ics

| 20.

Apr

202

3

Type: R...AUnits: 1Power: 1100 KWSpeed: 500 rpm

Application:Coal millGreece

5. Coal Mills

47 |

Bas

ics

| 20.

Apr

202

3

• 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

48 |

Bas

ics

| 20.

Apr

202

3

•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

49 |

Bas

ics

| 20.

Apr

202

3