STRAIGHT BLADE FOR VERTICAL SHAFT TYPE WINDTURBINE, AND STRAIGHT BLADE VERTICAL SHAFT TYPE WINDTURBINE

摘要

PROBLEM TO BE SOLVED: To provide a straight blade capable of achieving further light weight and low cost by reducing the number of parts compared with a conventional configuration while maintaining high strength.;SOLUTION: The straight blade 1 used for a vertical shaft type windturbine so as to be rotated by wind comprises: a blade outline part body 4 having integrally a blade inner circumferential rim part 42 and a blade outer circumferential rim part 41 facing the vertical axis radial direction, and a blade front rim part 43 and a blade rear rim part 44 facing the rotation direction with an opening formed in the blade outer circumferential rim part 41; a lid part 5 fixed by welding at a position for closing the opening for providing a blade outline part 2 to have the blade cross-sectional shape formed together with the blade outline part body 4 in a wing-like shape; and a core material 3 having a zigzag blade cross-sectional shape disposed in the internal space of a blade outline part 2 having a plurality of vertex parts 31 to be fixed by welding while coming into contact with a first outline surface 21 in the blade outline part 2 and a plurality of vertex parts 32 to be fixed by welding while coming into contact with a second outline surface 22.;COPYRIGHT: (C)2013,JPO&INPIT