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156 Doru Calarasu et al.
The mechanical-hydraulic protection mechanism includes the tilting device,
the balancing device of the wind turbine’s own weight and the two-way
movement damping device. The initial position (meaning a normal vertical
turbine operation) is triggered by a back stop. The model allows testing using a
set of signals to simulate the wind speed evolution.
Through vertical tilting, the rotor’s surface exposed to wind decreases as
shown in Fig. 3.
The arm of the component determining the tilting moment increases with
the increase of the turbine axis’ tilting angle (Fig. 4). Fig. 5 shows the variation
of the moment determined by the rotor’s tilting strength.
Fig. 4 – Variation of the rotor tilting strength arm.
Fig. 5 – Moment of the rotor tilting strength.