AXIAL FLOW TURBINE WINDMILL OF FLAT PLATE BLADE WITH CURVED PLATE OR CYLINDER AS FRONT EDGE

摘要

PROBLEM TO BE SOLVED: To develop an axial flow turbine windmill which can be made lightweight and manufactured easily, is rotated in the same direction at all the time even in an outgoing/incoming flow, and is operable in a wide low and middle rotation speed area and in which a startup time is short, by solving a disadvantage in a wells turbine conventionally used for wave farm, e.g., the length of a startup time or torque maintenance in a low rotation area and proposing a high-efficiency and low-priced turbine utilizing wave power for middle-type and small-type distributed power sources, namely, by combining a blade plate having uniform thickness with a structure (cylinder or curved plate or the like) having a curvature.SOLUTION: A blade plate body has uniform thickness and has no torsion. Therefore, in comparison with a conventional wing-type axial flow turbine, a turbine can be made lightweight and manufactured easily, and thereby reducing costs for manufacturing facilities. At the same time, in the axial flow turbine windmill, roundness such as a cylinder is added to a front edge of the blade plate, and thereby remarkably shortening a startup time from stop to normal rotation. Therefore, since an axial load torque during stop can be enlarged, a performance to maintain rotations even in low and middle rotation speed area is provided and an operating range is widened.