ROTATING AIRFOIL STRUCTURE FOR REDUCTION OF AIR RESISTANCE IN AEROGENERATOR

摘要

PURPOSE: A blade structure of a wind turbine for reducing air resistance is provided to prevent damages to a bearing, and to protect a rotary blade by reducing some of wind pressure while the blade is opened when wind velocity is above a pre-determined speed. CONSTITUTION: A blade structure of a wind turbine for reducing air resistance comprises two to four rotary blade plates(1), and a blade connecting shaft(2). The two to four rotary blade plates directly face wind. The ends of the rotary blade plates are joined at a rotary shaft, and the blade connecting shaft is connected to the rotary shaft. The rotary shaft delivers torque to a power generator. The rotary blade plates comprises a front blade plate(11), a rear blade plate(12), and a side plate(13). The front blade plate directly faces the wind to increase the intensity of the structure. The rear blade plate is attached to the rear side of the front blade plate to reinforce the front blade plate. The side plate is formed by welding the ends of the front and rear blade plates.