Advanced control of turbines – the Voith self-contained linear drive with fail-safe function
The newly developed electrohydraulic linear drive from Voith regulates
control valves on turbines precisely and in a highly dynamic way. It is selfcontained
meaning it operates completely without a hydraulic power pack.
In addition, there is an integrated spring assembly. Using this, the drive
closes the control valve in less than 200 ms in the event of a malfunction.
This fail-safe function increases the operational reliability of the system
and avoids costs for any secondary damage. The linear drive is a plug &
play solution that is optimally suited for both new systems and the
modernization of existing equipment.
The hydraulic system of the linear drive is self-contained. Oil management is not
required because there will be no ingress of dirt from an external source. Without
oil management, operators save the costs of operating material, pipework, wear
parts and maintenance work. Operation of the linear drive is maintenance-free
and offers all the benefits of a hydraulic solution, for example, a high power
density and a high reliability. The availability of the system increases. That
improves productivity and ultimately the bottom line.
The position is controlled in the Voith linear drive using the suppression principle
via a servo motor and a servo pump. This type of position control is highly
energy-efficient, while the level of heat introduced to the system remains low.
This reduces energy costs by up to 50 %. Lower CO2 emissions contribute to
The modular design of the linear drive enables very flexible integration in the
turbine control system. Installation in new systems or during a retrofit is simple,
quick and cost-effective.
Voith Turbo, the specialist for hydrodynamic drive, coupling and braking
systems for road, rail and industrial applications, as well as for ship
propulsion systems, is a Group Division of Voith GmbH.
Voith sets standards in the markets energy, oil & gas, paper, raw materials
and transportation & automotive. Founded in 1867, Voith employs more
than 42 000 people, generates € 5.7 billion in sales, operates in about 50
countries around the world and is today one of the biggest family-owned
companies in Europe.