The custom made cushion vibration isolators are designed for outdoor offshore and marine installations. The cushion vibration isolators are typically used as a trade-off between price and performance.
The steel structure are usually manufactured in steel S355J2G3 and painted according to offshore specifications. All other steel parts are typically in stainless steel AISI 316 covered with wax OKS2000.
Characteristics
The cushion isolators are optimized for medium to high resonance frequency, high environmental demands and external forces such as wind, waves, accidental loads etc.
Depending on the choice of cushions, resonance frequencies from 8 to 15 Hz can be achieved.
The stiffness can be tuned by pre-compressing the builtin snubbers.
This will also add damping to the isolators resulting in a lower amplification factor.
Maximum excitation amplitude: ± 1 mm.
Temperature range: -90 °C to +300 °C.
Applications
Elastic suspension of rotating machinery at >1200 rpm – fans, compressors, generator sets, reciprocating machinery etc.
Protection of turbines, accommodation and office modules from vibrations and impacts.
Technical documentation
We provide extensive technical support in the use of our products and systems. This can include:
Material certificates (related to project requirements, labtests etc.)
Engineering results (computer calculations, on-site support etc.)
Drawings in AutoCAD or Inventor (2D installation plans, 3D presentations etc.)
Tests to evaluate mechanical and long-term behavior
Manuals for maintenance and installation
Welding licenses and weighting certificates.
Calculations
With an extensive experience in the field, combined with use of modern tools, Vibratec are able to custom design cushion isolators that meets your requirements of vibration isolation.
Necessary calculations to ensure the performance of the system are regularly carried out. This can include:
Mechanical strength analysis by Finite Element Methods (FEM)
Modal analysis by use of Statistical Energy Analysis (SEA) or Finite Element Methods (FEM)
Load distribution calculations
Fatigue calculations
Resonance frequency and attenuation calculations
Calculation of fastening bolts or welds
