Aerodynamic imbalance
Axial vibrations due to aerodynamic imbalance can lead to premature failure of fatigue critical components (main frame, gearbox,…) which needs to be avoided.
Minimization of Vibrations
Unpredicted vibrations can cause a shorter life-time of your wind turbine. Keep the targeted life-time-value via an inspection regarding vibrations and make corrections before large damages are occurring.
There are three cases of imbalance due to vibrations.
Case 1:
Axial vibrations due to aerodynamic imbalance
Case 2:
Radial vibrations due to mass imbalance
Case 3:
A combination of both
Case 1
Step 1:
All blades set to nominal
Step 2:
Using high precision sensors, the blades are individually set to minimize the vibrations.
Case 2
Mass imbalance
Axial vibrations due to mass imbalance can lead to premature failure of fatigue critical components (main frame, gearbox,…) which needs to be avoided and performance loss due to increased cut-in wind speed.
Step 1
Performing measurements, determination of correction masses and placement.
Version 1
Lead weights around the blade root (smaller turbines)
Version 2
Water filled inflatable bags (larger turbines)
Version 3
Placement of correction masses on spar web
Case 3
A combination of aerodynamic imbalance and mass imbalance causes axial and radial vibrations. This leads to a solution combining the best technologies eliminating axial and radial vibrations.