Variable Speed Fluid Couplings

Voith Turbo I Variable-Speed Turbo Couplings I cr 104 en

Variable-Speed Turbo Couplings

Fair. Reliable. Innovative.

This is our promise to our customers. And it is the demand we place on ourselves in the Paper, Energy, Mobility and Service markets.

Paper Energy Mobility Service

Maxima 40 CC:

The world‘s most powerful single-engine

diesel-hydraulic locomotive. Introduced in 2006.

Fair Cooperation

Voith banks on a consistent partnership

and on long-term, trusting cooperation.

Long-standing customer relations, some

more than 100 years old attest to this fact.

We abide by our promises and will never

let our customers down.

Reliable Actions

Voith means continuous, dynamic growth

with solid returns and annual sales of

5.1 billion Euros. Our customers can be

confi dent that we will continue to support

their objectives – even in years to come –

with integrative and competent cooperation.

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For over 140 years Voith has stood for

inventiveness and innovation: with around

400 new patents per year, with substantial

investments in R & D and from the

professional accomplishments of our

39,000 employees around the world.

5Voith Turbo I Variable-Speed Turbo Couplings I cr 104 en

Voith Variable-Speed Turbo Couplings

Developed for Reliability

Fields of applications, drives of:

Voith Turbo is the worldwide leading manufacturer of hydro dynamic

variable-speed drives. Continuous development keeps our products

at the latest state of technology.

Ongoing research, state-of-the-art test equipment and a compre-

hensive quality assurance system form the basis of the reliability

of Voith variable-speed couplings. Voith variable-speed turbo cou-

plings are renowned all over the world for numerous features and

customer benefits in the widest range of applications.

Power plants:

� Fans

� Pumps

Materials handling:

� Slurry pumps

� Belt conveyors

District heating plants:

� Circulating pumps

Chemical industry:

� Pumps, Fans

� Mixers, Centrifuges

Oil & gas industry:

� Pumps

� Compressors

Metallurgical industry:

� Blowers

� Descaling pumps

Water industry:

� Water supply and waste water

pumps



Unique Advantages – Strong Benefi ts

Voith variable speed couplings are the optimum solution for a reli-

able operation of your plant.

They are renowned for numerous features and customer benefi ts.

Those are i.e. cost and energy saving, easy maintenance, long ser-

vice life. They alltogether result in a unmatched total cost of

ownership for the operator in a wide range of applications.

Customers all over the world count on the unique range of benefi ts:

Precise load adaptation of driven

machines due to the high control

accuracy and fast reaction times.

Easy maintenance, low mainten-

ance costs.

Long service life.

Wear-free transmission of power

through kinetic energy of a fl uid.

Mechanical separation and thus pro-

tection of motor and driven machine

by dampening of torsional vibrations

and shock loads.

Low downtimes due to extremely

high reliability and availability.

6


Relieved motor start-up and smooth

acceleration of heavy masses re-

sults in less stress and thus a longer

service life of the motor.

Compact and robust design. Energy savings, lower operation

cost and extension of the life time

of the driven machine compared to

fi xed speed.

Suitable for a wide variety of en vi-

ronmental conditions (i.e. tropical

climates, desert, arctic and hazard-

ous areas).

Integrated lube oil system. Lube oil

supply to motor and driven machine.

Optimium total cost of ownership

com pared to alternative drive

systems.

7


Simplified cross section:

1 Pump wheel2 Turbine wheel3 Shell4 Scoop tube housing5 Oil sump6 Oil circulation pump7 Scoop tube8 Working oil cooler

8

Function

Voith variable-speed turbo coup-

lings are fluid couplings, connecting

the prime mover – in most cases

an electric motor – with the driven

machine. The coupling transmits the

power by means of the kinetic ener-

gy of the fluid, mostly oil. It circu-

lates in a closed working chamber

bet ween the pump wheel, connect-

ed to the in put shaft, and a turbine

wheel, connected to the output

shaft.

The filling grade of the operating

fluid can be varied during operation

between 0% and 100%, thus

enabling exact and stepless speed

control of the driven machine. The

operating range depends on the

load characteristics (torque relative

to speed).

7

3

2

1

4

1 2 3 4 7

5

8

6

Voith Turbo I Variable-Speed Turbo Couplings I cr 104 en 9


Torque Curves

Operating range

The performance diagram shows

the transmittable coupling torques

TK at different scoop tube positions

as a function of the output speed.

The desired output speed is the

result of a stable intersection bet-

ween coup ling torque TK and load

torque (load curve).

Torque curves of different driven machines against variable-speed turbo coupling performance curves

Parameters:

Scoop tube position in % of scoop tube movement.

TK Coupling torque

Smin Minimum slip required for torque transmission

S = (1 - n2

n1

) • 100 [%]

n1 Input speed

n2 Output speed

Operating ranges:

I, IV Starting range II Control range III Overload range

The continuity of the curve is subject to modifications, since minor deviations of coupling size, circulation volume and oil viscosity are possible.

125

100

75

50

25

050 100

Smin

0%

10%

20%

30%

40% 50% 60% 70% 80% 100%

III

I

II

IV

1

2

3

4

TK [

%]

Output speed [% of input speed]

Typical load curves:

1 Constant torque (e. g. positive displacement pumps, and compressors)

2 Decreasing torque (e. g. boiler feed pumps operating at varying pressure)

3 Parabolic torque (resistance parabola, pumps with-out back pressure, fans)

4 Decreasing torque (e. g. boiler feed pumps at fixed pressure operation)


Voith Turbo I Variable-Speed Turbo Couplings I cr 104 en10


Type SVTL

Coupling type SVTL has a self-sup-

porting design in a tunnel housing.

The rotating parts are supported in

the closed, oil-tight housing. Electric

motor and driven machine are con-

nected to the variable-speed turbo

coup ling via connecting couplings.

1 2 3 4 7

5

8

6

Simplified longitudinal section

1 Pump wheel

2 Turbine wheel

3 Shell

4 Scoop tube housing

5 Oil sump

6 Oil circulation pump

7 Scoop tube

8 Working oil cooler

The oil tank is integrated into the

housing, the oil pump is directly

driven by the input shaft. The shafts

are supported in antifriction bearings

which are lubricated by a mechani-

cally driven lube oil pump incorpo-

rated in the variable-speed coup ling.


Variable-speed turbo coupling type SVTL in a boiler feed pump drive.

* With this design, oil tank extends into base, dimension B is therefore exceeded.

Size A B C Oil fi lling Weight

366-22 973 500 1,490 110 l 610 kg

422-22 973 500 1,490 110 l 630 kg

422-22-2,0 1,120 630 1,780 250 l 850 kg

487-21 973 500 1,490 110 l 570 kg

487-22 1,145 630 1,780 250 l 900 kg

487-12 1,255 800 1,780 500 l 1,200 kg

562-21 1,145 630 1,780 250 l 970 kg

562-12 1,255 800 1,780 500 l 1,260 kg

562-33 1,358 800 1,350 450 l 2,200 kg

562 HP 1,358 800 1,350 450 l 2,200 kg

650-21 1,310 750 2,000 300 l 1,200 kg

750-21-6,3 1,310 750 2,000 300 l 1,300 kg

750-22-12,8 1,469 725 1,400 400 l 1,750 kg*

866-22-12,8 1,469 725 1,400 400 l 1,800 kg*

Dimensions in mm.

A

B

C

Selection chart: Variable-speed turbo coupling type SVTL

5060

80100

200

300

400500600

8001000

2000

3000

40005000

7000

400 500 600 750 1000 1200 1500 1800 3000 3600

Input speed n1 [rpm]

Inp

ut

po

we

r ra

tin

g P

1 [

kW]

866

SVTL

22-

12,8

750

SVTL

21-

6,3

650

SVTL

21

562

SVTL

21

562

SVTL

12

487

SVTL

21

487

SVTL

22

422

SVTL

22

366

SVTL

22

562

SVTL

33

562

SVTL

HP

487

SVTL

12

422

SVTL

22-

2,0

750

SVTL

22-

12,8



1 Pump wheel

2 Turbine wheel

3 Shell


5 Oil sump


7 Scoop tube


12


Types SVNL, SVNLG

Coupling types SVNL and SVNLG

are of self-supporting design with a

horizontally split housing.

The rotating parts are located in the

completely closed, oil-tight housing.

Main motor and driven machine are

connected to the variable-speed tur-

bo coupling via connecting coup-

lings.

The oil tank is integrated into the

housing, a centrifugal oil pump (or,

with certain designs, a gear pump)

is used which is direct driven by the

input shaft.

With type SVNL, the main shafts

are supported by antifriction bear-

ings. The bear ings are force lubri-

cated using pressurized oil.

With type SVNLG, the main shafts

are supported by sleeve bearings.

The bearings are force lubricated by

pressur ized oil. For pre-lubrication

prior to start-up, an electric motor

driven auxiliary lubrication pump is

added.

1

8

8

556

6

47

117

2 3 1 2 3

4

Type SVNL Type SVNLG


Variable-speed turbo coupling type SVNL in a circulation pump drive.

Type SVNL


866-22-26 1,750 1,060 1,820 1,000 l 3,850 kg

1000-21-18,5 1,950 1,060 1,920 780 l 3,850 kg

1000-22-32 1,950 1,060 1,920 780 l 4,000 kg

1150-21-18,5 1,950 1,060 1,920 780 l 4,000 kg

1150-22-32 1,950 1,060 1,920 780 l 4,150 kg

1210-21-22,5 1,950 1,060 1,920 780 l 4,250 kg

1210-21-32 1,950 1,060 1,920 780 l 4,250 kg

1210 HP 1,950 1,060 1,920 780 l 4,250 kg

Type SVNLG


1330-12 3,150 800 2,400 1,500 l 12,000 kg

1330-21 3,150 800 2,400 1,500 l 10,000 kg

1390-21 3,150 800 2,400 1,500 l 11,000 kg

1540-21 3,150 800 2,400 1,500 l 12,000 kg

1780-21 3,780 900 2,900 3,000 l 16,200 kg

Other sizes upon request. Dimensions in mm.

A

B

C

Selection chart: Variable-speed turbo coupling type SVNLG

5060

80100

200

300

400500600

8001000

2000

3000

40005000

7000

400 500 600 750 1000 1200 1500 1800 3000 3600


Inp

ut

po

we

r ra

tin

g P

1 [

kW]

1150

SVN

L 21

-18,

512

10 S

VNL

21-3

2

1210

SVN

L HP

1210

SVN

L 21

-22,

5

1000

SVN

L 21

-18,

5

1150

SVN

L 22

-32

1000

SVN

L 22

-32

866

SVNL

22-

26

300

400

600

800

1000

2000

3000

4000

5000

8000

400 500 600 900 1200 15001800 3000 3600


Inp

ut

po

we

r ra

tin

g P

1 [

kW]

1780

-21-

80

Selection chart: Variable-speed turbo coupling type SVNL

6000

10000

1780

-12-

120

1540

-21-

50

1540

-12-

80

1330

-12-

80

1330

-12-

5011

50-2

1-18

,5

487-

33

562-

33

620-

3368

2-33

750-

22

866-

22

866-

22-2

6

1000

-22

1150

-22



Type SVL

Coupling type SVL has a self-sup-

porting design with high power den-

sity. Input and output shafts are

supported separately in a cast iron

housing. Main motor and driven

machine are connected to the vari-

able-speed turbo coupling via con-

necting couplings.

1 2 3

4

8

10

7

9

56

11

The oil sump is flanged to the hous-

ing. The coupling has two oil circuits:

a working oil and a lubricating oil

circuit.

Both circuits are with mechanically

driven pumps. A flow control valve

adjusts the working oil flow to save

energy. The shafts are supported in

sleeve bearings which are force

lubricated using pres surized oil.


1 Pump wheel

2 Turbine wheel

3 Shell

4 Coupling housing

5 Oil sump


7 Scoop tube

8 Flow control valve

9 Auxiliary lubricating pump


11 Lube oil cooler


Variable-speed turbo coupling type 562 SVL in a crude oil/offshore pump drive.

Variable-speed turbo coupling type SVL in a pipeline pump drive.

Selection chart: Variable-speed turbo coupling type SVL modular

1000

30000

1000 2000 7000


Inp

ut

po

we

r ra

tin

g P

1 [

kW]

682

SVL

M62

0 SVL

M56

2 SVL

M51

0 SVL

M

3000 4000 5000

10000

5000



Type SVTW

Variable-speed turbo coupling type

SVTW is operated with water in-

stead of mineral oil as operating

medium. It combines a new concept

with proven technology. The coup-

ling is directly flanged to the motor

which results in compact design

and easy installation.

The coupling type is available both

in horizontal and vertical design.


1 Motor shaft

2 Coupling housing

3 Pump wheel

4 Turbine wheel

5 Shell

6 Scoop tube

7 Output shaft

8 Water supply line

9 Water return line

10 Scoop tube linkage

4 56

7

1

9

3

2

10

8

Variable-speed water coupling type SVTW – horizontal design, flanged to electric motor. SVTW horizontal.

Some applications are the drive of

pumps in irrigation systems, in mu-

nicipal water works and associated

waste water systems. The pumped

water can be used as operating me-

dium.


Electric motor (P = 600 kW, n = 990 rpm) with vertical water coupling type 866 SVTW as drive of a drinking water pump in a German waterworks.

Size A B C D Weight

562 577 170 747 850 700 kg

650 738 170 930 960 847 kg

750 816 170 1,040 1,120 1,267 kg

866 1,011 210 1,273 1,350 2,040 kg

1000 1,133 250 1,415 1,500 2,990 kg

1150 vert. 1,254 250 1,586 1,720 4,450 kg

1390 vert. 1,522 300 1,894 2,065 6,750 kg

Dimensions in mm.

D

B

A

C

Selection chart: Variable-speed turbo coupling type SVTW

4500

400 600 750 900 1800


Inp

ut

po

we

r ra

tin

g P

1 [

kW]

1390

ver

t.

3500

2500

1500

1000

500

1200 1500

1150

ver

t.10

00

866

750

650

562

100



Types SVNL vert., SVNK vert.

Type SVNL vert. Type SVNK vert.

Coupling type SVNL vert. is self-

supported and has a vertical de-

sign. The rotating parts are fully

supported in the housing.

Coupling type SVNK vert. is partly

self-supported and has also been

designed for vertical applications.

The coupling is supported by the

main motor shaft on the input side;

on the output side, a bearing has

been incorporated into the scoop

tube housing.

The housing of both types can be

adapted to the flange of the driven

machine. The oil supply is ensured

by a separate oil supply system.

Depending on the size, designs with

both antifriction and sleeve bearings

are available.

1

2

3

4

7

56

1

2

3

4

7

56

88


1 Pump wheel

2 Turbine wheel

3 Shell


5 Oil sump


7 Scoop tube



Selection chart: Variable-speed turbo coupling type SVNL vert.

200

5000

400 600 4000


Inp

ut

po

we

r ra

tin

g P

1 [

kW]

1150

-22

4000

3000

2000

1000

500

300

2000 3000

19

Variable-speed turbo coupling type SVNL vert. in a waste water pump drive.

Size A B Cmin.*

487 945 775 680

562 1,250 1,030 790

650 1,250 1,030 890

750 1,614 1,305 1,050

866 1,614 1,305 1,180

1000 2,046 1,656 1,360

1150 2,046 1,656 1,560

Type SVNL vert. dimensions in mm.

Type SVNK vert. dimensions upon

request.

* customized to suit motor or driven

machine.

800 1200

1000

-22

866-

2275

0

650

562

487

366

316

C

B

A


Integration of Voith Variable-Speed Turbo Coupling

into a Control Circuit

Position control circuit

Components:

� Scoop tube actuator including position controller for

continuous control operation

Process control circuit

Components:

� Process controller

� Scoop tube actuator including position control for

continuous control operation

If the speed is to be used as a pro cess value or if it is to

be displayed or to be incorporated, a speed mea suring

device is provided.

Similar to the speed, a process value (e. g. pressure,

flow, etc.) can be incorporated into a control cir cuit.

Then this process value is used as set value.

Variable-speed turbo couplings serve to control the speed of

driven machines. In many cases, the couplings are integrated

into an automatic process.

Position control circuit Process control circuit

MotorDriven

machineMotor

Driven

machine

Scoop tube

position controller

Actuator Actuator

Actual value scoop

tube position

4 – 20 mA

Set value

scoop tube position

4 – 20 mA

Actual value scoop

tube position

Set value scoop

tube position

Actual proces

value

4 – 20 mA

Set proces

value

4 – 20 mA

Speed

indicator

Process controller

Speed

measurement

device

Scoop tube

position controller

Pole wheel

with pick-up

20


Technical Information for

Voith Variable-Speed Coupling Selection

21

Please complete the following questionnaire as detailed as possible, in order for a detailed design of a Voith Variable-Speed Coupling to be achieved.

Required information

Customer

Project name

Location (City, Country)

Driven machine (Application; e.g. boiler feed pump)

Quantity

Torque characteristic ❑ parabolic ❑ constant

Maximum power consumption Pa of driven machine kW

Motor speed ne

rpm

Maximum speed na of driven machine rpm

Required regulating range _______ – 100%

Arrangement ❑ horizontal ❑ vertical

Additional information

End user

Engineering company

Motor power Pe

kW

Cooling water available ❑ yes Water temperature: _______ °C

❑ no Ambient temperature: min. _______ °C

(for air-oil-cooler selection) max. _______ °C

❑ fresh ❑ demineralized ❑ sea water

Installation ❑ indoor ❑ outdoor

Area classifi cation (in case of hazardous area)

External lube oil supply requirements

(motor and driven machine)

❑ yes Oil flow: _______ l/min

Temperature: _______ °C

❑ no

Specifi cation, special requirements

Please send the fi lled-in form by fax (+49 7951 32-650) or by email ([email protected])

to the Voith Variable-Speed Drives team. We will get in contact with you shortly. Thank you.

Contact

Name, Company

Phone & Fax, Email 37,109 mm


cr10

4en,

01.

2010

, 3.0

00, a

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A. D

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Sub

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to m

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ns.

Voith Turbo GmbH & Co. KG

Variable-Speed Drives

Voithstr. 1

74564 Crailsheim, Germany

Tel. +49-7951 32-0

Fax +49-7951 32-650

[email protected]

www.voithturbo.com / variable-speed

Documents

Variable Speed Fluid Couplings