Ball joints

Ball joints

ESM has developed spherical rubber joints which allow large oscillation angles. As sliding surfaces are avoided they are wear- and maintenance-free. Deformations of up to 20° during normal operation and up to 65° during extreme events can be achieved using spherical rubber joints.

Those joints can for example be applied as double cardanic arrangement to realize a pendulum tower damper.

In offshore installations with floating foundations ESM ball joints replace the typically used metal shackle connectors for mooring wire. As ESM’s elastic wire-rope-mounting for floating offshore installations they allow a wear-free and constraint-free connection between the holding wire ropes and the anchor on the sea floor.

The ball joints can be designed seawater-resistant with a lifetime of up to 30 years and can last up to 30 years. Compared to shackle connections, the joints remain wear- and maintenance-free for the entire lifetime of the installation.


Properties
  • Large oscillation angles are allowed
  • Deformations of up to 20° during normal operation and up to 65° during extreme events can be achieved
  • Operating loads in direction of movement are implemented up to 1,000 kN and feasible up to 10,000 kN
  • Wear- and maintenance-free
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Applications
  • Double cardanic arrangement to realize a pendulum tower damper
  • Elastic wire-rope-mounting for floating offshore installations
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