STAND FOR TESTING THE OVERSPEED PROTECTION CENTRIFUGAL MECHANISM OF A 5 KW
WIND TURBINE ROTOR
The testing stand is designed to check the rotor protection complex system of a wind aggregate of 5 kW at over speed. The planned complex system is designed as an automatic mechanical system to react without electronic control. Only the returning to the initial state is controlled by the electronic system of automatic control of the wind turbine. The stand checks triggering centrifugal mechanism when is achieved the maximum rotation speed initially prescribed. The triggering of the centrifugal mechanism must be followed by the locking in its extreme position of the rotation of the blades. After locking, the centrifugal speed is reduced to 20 … 30 rpm then, if weather conditions allow, it gives the command to unlock the centrifugal mechanism. An electric motor drives a cam which raises the locking pin so that the centrifugal mechanism returns back to the normal working position. The adjusting of the centrifugal counterweight of the centrifugal mechanism and the impeccable operation of the whole automatic system should be checked on the testing stand. The purposes of the tests are to adjust, check and improve the endurance of the mechanism.
Keywords: wind turbine, testing stand, protection mechanism at overspeed, locking-unlocking device
Cuvinte cheie: turbină eoliană, stand de probă, mecanism de protecţie la supraturare, dispozitiv de blocare-deblocare
