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Safe, Advanced Control: Voith Self-contained Servomotor - SelCon

Thad Berry

February 19, 2015

SelCon | February 2015

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Our Companies

Voith PaperVoith Turbo Voith HydroVoith Industrial Services


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Voith Turbo, Products for Many Industries

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Advantages of Voith Organization For Product Development

• Each Product Group has it‘s own engineering resources and product goals

• Many product groups have complementary skillsets and/ or technologies

• Internal communications are supported to utilize each groups resources when sensible

• Customers drive much of our product development


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Voith Controls: Precision Control and Measurement for Critical Applications

19751976

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20062007

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2008future

19941986 2004

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20122013

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Way Valves (WSR) – Single or Double Acting Directional Valve

Single Coil Valve


Tandem Way Valve

Redundant Way Valve

Transfer of 4 – 20 mA control signal into hydraulic cross sectional area.

– Direct Actuation of Cylinder Assembly

– Precision Positioning• .01 mm

resolution• Fast stroke times • Magnetic force

control• Integrated

position controller

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4/3-Way Valve: Integrated Position Controllere.g.: 24 VDC on; w = 4,00 mA, x = 4,00 mA; Stroke position: 0 mm (Valve closed)

T P T

A B

FMag FSpring

60

0

Position Feedback (10 .... 0 VDC) 10.0 VDC

Position Feedback (20 .... 4 mA) 20.0 mA

24VDC

w IF

x

Proc

ess

cont

rolle

r

4 mA

4 mA

=

w

+ -

Pow

er s

uppl

y

1 A / 3 A

FB

4/3 Way Valve


Some Control Strategies Regulate Flow + Pressure Downstream

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4/3-Way Valve: Integrated Position Controllere.g.: 24 VDC on; w = 4,00 mA, x = 4,00 mA; Stroke position: 0 mm (Valve closed)

T P T

A B

FMag FSpring

60

0



24VDC

w IF

x

Proc

ess

cont

rolle

r

4 mA

4 mA

=

w

+ -

Pow

er s

uppl

y

1 A / 3 A

FB

4/3 Way Valve


Cylinder Position (due to Flow and Pressure)

We Measure Position At the “Nozzle” And Then Compare it to

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Integrated Position Controller Philosophy Produces The Published Position Resolution of <.01 mm

T P T

A B

FMag FSpring

60

0



24VDC

w IF

x

Proc

ess

cont

rolle

r

4 mA

4 mA

=

w

+ -

Pow

er s

uppl

y

1 A / 3 A

FB

4/3 Way Valve


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Type WSR-D45 WSR-D60 WSR-D80 WSR-K120

Q (l/min) ∆p = 8 bar 165 280 430 1270Design

Design & Assembling of a ServomotorUsing our Modular Philosophy

Selection of Voith way valve

Sensors from Kavlico, Balluf Macro etc.


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Voith Servomotor / Valve Assembly Applications

Turbo Compressor Control Valves Anti Surge Valve Pipeline Blow-off Valve


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Gas Turbine Fuel Control Valve Assemblies for Large Gas Turbines

Control Valve Block for 260 MW Gas Turbine


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Application new Steam Turbines - Steam admission Valve actuated by Voith Servomotors Main Steam, Extraction, and Trip Valve Assemblies for Steam Turbines


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Redesign for Hydraulic Control Valve Trains

Power Unit Self Contained Servomotor


Self contained electric servomotors requires onlyElectric feedersOnly electrical wiring, no hydraulic piping

PipingAnd Instrumentation

Servomotor Assembly

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Applications for Other Industry Segments Pneumatically Operated Equipment

Remote Actuation for a variety of Applications


Low power usage requirementsIntegrates into any control system/ RTUReliable, rugged designMinimal Preventative Maintenance requirements

Reduce O&M, no pneumatic supply systems,piping, or istrumentationReduce EmissionsEasy Installation, only electrical wiring required,

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Adding Voith Gear Motor From Voith Pump Group

Voith internal gear servo-pump

• Radial and axial sealing gap compensation

• High efficiency over a wide speed range

• Very low pulsation, low noise level

• Standardized pump sizes (3.5 – 250 cm3)


1 Pinion shaft2 Annulus gear3 Filler pin4a Filler piece-segment carrier4b Filler piece-sealing segment5 Axial disk6 Axial pressure field7 Plain bearing8 Housing9 Hydrostatically relieved bearing1 6 8 5 6 2 9 8 5 6 2 1 4a 4b7 3

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Proven Gear Pump Design – 25 Years of Development and Service


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Self-Contained Electro-Hydraulic Servomotor “SelCon“


• Same Precision Valve Resolution <0.01mm

• Fast Trip Capable <300 ms

• Very Low Noise application

• Requires 24 VDC Power Supply; <5A peak power requirement, <1 A to operate

• Integrates with any control system (4 –20 mA signal)

• Fail Safe: Extend, Retract, or Hold

• Designed for Harsh EnvironmentsSelCon SMR-A90301

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Self-Contained Electro-Hydraulic Servomotor “SelCon“ • Configurable for a wide

variety of equipment and sites

• Onboard Oil Supply (High Heat Blend)

• Needs replacement every 5 – 7 years

• Sealed System, no oil contamination

• No emissions

• Ideal for Remote Installations / Applications

• Commonality of ComponentsSelCon | February 2015

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Electric Actuator Self-Contained Product Development

New Electric Servomotor on Test Stand


• SMR – F 81201

• Freq. Converter

• 24VDC Power Supply

• Instrument Simulator

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Any Questions? Thank You For Your Time


Exhibition Model:Type: SelCon SMR-A120/60-55

Demonstrator Setup: Turbomachinery Houston

22SelCon | February 2015

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