Elastic Support of Power Plant Equipment

Elastic support of Gas and Steam Turbines

Gas Turbines
Big conventional gas turbine foundations are prone to settlements, especially on bad subsoil, which may lead to problems in operation and/or additional stresses in the foundations. Their elastic support on GERB spring elements will prevent that. Subsequent alignment of the system on spring level - without touching the machine - is easy and simple, in many cases even while the gas turbine is running.

The GERB spring system can also protect the gas turbine in case of earthquakes, if combined with Viscodampers®.

An excellent basic vibration control effect of the spring system is also obvious, which is especially important when the gas turbines are installed on power barges.

Steam Turbines
The elastic support system for turbine generator foundations has been widely accepted during the past 40 years by the industry. The GERB system – jointly developed with leading turbine manufacturers - was applied for the first time in the German Nuclear Power Plant STADE in 1968 to support a 660 MW turbo generator. Presently, this system is used world-wide on turbines with capacities up to 1.600 MW.

Leading manufacturers of turbines and other power plant equipment using the GERB system, emphasise the following advantages:

  • The turbo generator foundation is dynamically uncoupled from the substructure,
  • More space below the turbo generator for the arrangement of condensers and piping.
  • Integration of the substructure into the building, which consists of the beams and/or columns,
  • Reduced construction costs for the basemat,
  • Shorter construction time for the foundation
  • By reducing the dynamical loads risk of settlements is reduced,
  • Easy adjustment and realignment in case of settlements. Adjustments can be carried out without interrupting the operation of the machine,
  • Protection of the turbo generator in case of earthquakes.