Wind turbine levelling

Wind turbine levelling

(Tool deployed : Hydraulic cylinders)

For levelling offshore wind turbine foundations in order to realise the optimal effect, Holmatro’s lightweight hydraulic cylinders are the right choice. In this example case we are taking a closer look at the installation of an offshore wind farm in which the turbine foundations come in two parts :

Wind turbine levelling

The foundations are formed by two large steel tubes:
A monopile (MP) that is driven into the seabed, and a transition piece (TP) that is fitted on top of the MP. Three to six pre-installed hydraulic cylinders inside the TP make it possible to align the TP - which weighs over 300 tons - to an exact vertical position, even if the MP was not completely level in the first place. This ensures that the turbine will generate maximum yield.
Another pole - holding the actual turbine - is than place on top of the foundation. In their full glory the wind turbines rotate approximately 60 metres above sea level. The complete constructions need to be able to stand the heavy conditions at sea.

Experienced partner

Holmatro has already developed and delivered hydraulic cylinders for the creation of offshore wind parks such as Belwind in the North Sea off the Belgian coast, and the British projects Walney and London Array. The space available for the positioning of cylinders inside a TP is very limited. Holmatro's cylinders have such a large lifting capacity - the maximum operating pressure is 720 bar - that this type of relatively small and compact cylinder can be used to jointly do the job. They are easy to use and corrosion-resistant, which makes them ideal for offshore applications.

Specifications cylinders

HAC 75 S 10

  •  tonnage (t): 75
  • stroke length (mm): 100
  • closed height (mm): 235
  • weight (kg): 13.5

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HJ 75 S 10

  • tonnage (t): 75
  • stroke length (mm): 100
  • closed height (mm): 235
  • weight (kg): 28.0

Multi Purpose Cylinders - Spring Return >