Cylinder Issues
Link bearing head
The link bearing head plays a key role in transferring load between the pitch cylinder and the blade system. Wear or design limitations can influence load distribution and movement accuracy. If left unaddressed, this can affect pitch behaviour and contribute to lost wind energy over time.
Understanding the Problem
What is a link bearing head?
The link bearing head connects the pitch cylinder to the blade or pitch mechanism and allows controlled movement under load.
It is exposed to repeated dynamic forces and alignment demands during normal turbine operation.
If the bearing interface or design no longer supports stable movement, load transfer can become uneven and accelerate wear in surrounding components.
Typical symptoms
Irregular pitch movement
Pitch response may feel less smooth, especially during continuous regulation.
Increased mechanical play
Free movement or looseness may be observed at the cylinder connection point.
Uneven load transfer
Forces are not distributed as expected, affecting how the pitch system reacts under load.
Noise development during pitch movement
Mechanical sounds may appear during operation, particularly under changing wind conditions.
Accelerated wear at interface points
Surrounding components may show wear patterns linked to unstable bearing behaviour.
Reduced pitch accuracy
Small deviations in blade positioning may occur during regulation.
Increased corrective activity
The system may compensate more frequently to maintain expected pitch behaviour.
Solution
Upgraded link bearing head
An upgraded link bearing head is used when the original design or condition no longer supports stable long‑term operation. The upgraded version incorporates improved design features and interfaces that better accommodate load and movement demands.
This supports more consistent load transfer and reduces the risk of recurring wear patterns. The approach is selected when it provides the most responsible balance between safety, turbine lifetime, operational impact and overall sustainability.
