LIGHTWEIGHT MAIN BEAM FOR WIND POWER BLADE HAVING CONCAVE STRUCTURE AND MANUFACTURING, MAIN BEAM STRUCTURE COMBINATION, AND WIND POWER BLADE AND MANUFACTURING METHOD THEREFOR

摘要

The present disclosure provides a lightweight spar cap with a concave structure for a wind turbine blade and a manufacturing method thereof, a spar cap structure combination, a wind turbine blade and a manufacturing method thereof. The lightweight spar cap is groove-shaped as a whole, and includes supporting portions located on two wings of the lightweight spar cap and an intermediate connecting portion connecting the two supporting portions. The manufacturing method of the lightweight spar cap includes laying a reinforcing body of the intermediate connecting portion and a supporting material of the supporting portion, and performing resin infusion. The spar cap structure combination includes a web and the lightweight spar cap, where two ends of the web are connected with a pressure surface lightweight spar cap and a suction surface lightweight spar cap respectively through a positioning matching structure. The wind turbine blade uses the lightweight spar cap structure combination. By comprehensively considering multiple factors, the present disclosure reduces the weight of the wind turbine blade, improves the material utilization of the wind turbine blade, and realizes a lightweight wind turbine blade.