Vibration-isolated installation of industrial machinery
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Machines in industrial environments – such as presses, diesel generators, blowers etc. – often cause and/or emit vibrations and structure-borne noise in their environment. These vibrations are often annoying or harmful to the health of people who live or work nearby. In addition, vibrations affect the functioning of sensitive machines such as measuring machines.
Isolation is a proven solution for reducing vibrations. This not only reduces the transmission of vibrations from a vibration source to the environment (source isolation), but also vibrations from the environment to sensitive equipment and machines (receiver isolation). By deliberately introducing elastic elements between the machine and the foundation, the vibration characteristics of the overall system are changed in such a way that the dynamic forces applied from the machine to the ground or transferred from the ground to the machine are reduced. Additional damping removes vibration energy from the system. As a result, the vibration amplitudes can be limited or the decay time after a shock shortened.
Steel springs are usually characterized by an almost linear force-deformation behavior. This means that a force is always assigned a deformation. They have very low structural damping themselves, but can be combined with viscoelastic dampers, so that damping can be set within wide limits according to the needs of the application. With steel spring elements, the overall system is usually tuned to a frequency in the range of about 2 Hz to 8 Hz. The tuning frequency has an effect on the degree of isolation. The softer the installation, the greater the degree of isolation and the lower the dynamic forces that are transmitted.
Compared to steel springs, elastomers have a nonlinear or progressive force-deformation behavior. In addition, the material stiffens under a dynamic load. Elastomers have material damping that can only be set within limits via the type of elastomeric formulation that is chosen. With elastomeric bearings or mats, tuning frequencies greater than 8 Hz can be implemented. Compared to steel spring elements, this results in a harder installation and a lower degree of isolation – which may, however, be sufficient for the chosen application.
We will gladly assist you in choosing the suitable solution for your application. If you have any questions or suggestions, please do not hesitate to contact the relevant technical department.