Spring Elements and Spring Damper Elements

Vibration isolation of turbines

The vibration isolated support of turbines has the following advantages:

• Lower dynamic forces affecting the supporting structure and thereby smaller building component cross-sections can be used
• Larger space envelope for the installation of the surrounding capacitors and pipelines
• Easy, elastic compensation of unequal settlements
• Earthquake protection

Vibration isolation of pumps

The vibration isolated support of pumps has the following benefits:

• Vibration reduction
• Easy, elastic compensation of unequal settlements
• Load redistribution
• Earthquake protection

Vibration isolation of fans

The vibration isolated support of fans has the following advantages:

• The possibility of direct bearing
• Reduction of induced dynamic forces into the ground and by that prevention of settlements
• Easy, elastic compensation of unequal settlements
• Easy leveling through shimming
• Defined damping of the fan through extra damping elements

Vibration isolation of coal mills

The vibration isolated positioning of coal mills provides:

• Noise and vibration protection for people, plants and surrounding building sections
• Reduced foundation costs
  Increased machine reliability and the operating performance
• Cost reduction because of reduced machine maintenance and through the prevention of downtime
• Elastic compensation of settlements in operation
• Earthquake protection

Vibration isolation of forging hammers

With forging hammers the forming energy is mostly imparted by the hammer falling off onto the workpiece. They can be distinguished into drop hammers, double acting hammers and counterblow hammers. With drop hammers the forming energy is the result of the mass of the hammer and the height of fall. Double-acting hammers achieve higher forming energies and impact velocities through an extra acceleration of the hammer.

With counterblow hammers the hammer is paired kinematically or hydraulically with the lower hammer and the impact velocities increase as well. What they all have in common is a primarily vertical shock excitation or shock sequence. Distinctive are the deformation stokes as well as the final rebound impact, with which there is no further deformation of the workpiece and the whole impact energy is transferred to the foundation.

Vibration isolation of forming presses

Forming presses can be divided by the functional principle and the excitation. In hydraulic presses a vertical, impulsive deformation force is provided by the hydraulic medium and the inertia of the ram. With crank, eccentric and screw presses the movement of the ram is given through a gear. The deformation energy is often provided by a flywheel, which is engaged in the deformation process and decelerated through that. In modern servo presses flywheels may partly be dispensed and the ram movement is freely programmable. Superimposed impact force and torque excitations are typical for presses. The resulting vibrations can lead to an overstress of the foundation. In addition to vertical vibrations, tiliting and rotation can also occur.

Vibration isolation of gas and diesel genarators

Gas and diesel generators are often used as a local energy provider. They consist of an engine and a generator for the power generation, typically positioned on a structural framework. Vibrations occur e.g. through unbalance forces or through a generator short circuit as a fault load condition. Diesel generators are often used for emergency backup in hospitals or in the maritime sector on ships, where high requirements are placed on vibration protection and structureborne sound isolation. For these cases a vibration isolated support is common. Diesel generators are often located in seismic active regions and have to be fully functional after an earthquake.

Vibration isolation of testing machines

Dynamic testing machines like resonance and hydro pulsers or an unbalance exciter are e.g. used for fatigue strength testing of components and can produce large harmonic loads in a predefined frequency. Hydro pulsers can also generate shock type or random exciting forces through the hydraulic control. Vibrations can spread, with a firm foundation, through the subsoil into neighboring buildings.