BLADE ASSEMBLY

摘要

PURPOSE: A blade assembly is provided to be securely fixed without a blade which is not separated from a blade root even though a rotational centrifugal force is generated. CONSTITUTION: A blade assembly comprises a rotor hub, a blade root unit (300), and a blade unit (200). The blade unit includes a blade body (230) with an airfoil shape; a blade head (220) with a cylindrical shape which is extended from one end of the blade body; and a blade flange (210) which is expanded, and extended from one end of the blade head. The blade root unit includes an outer housing (310), an inner housing (320), a supporter (330), and a retention bolt (340). The outer housing has a blade insertion hole which is opened in a cylindrical shape comprising a pair of a left and a right piece, and which the blade head is inserted into; an expanded pipe part which is expanded in a ring shape on the circumferential surface of the housing, and which the blade is inserted into and held in; a retention insertion hole which has a smaller diameter than the blade and which is formed on one end.