Rotary vane, rotary device, and power generation device

Abstract

The wind power generation device has multiple rotating blades (15) about a rotation axis. Each rotating blade (15) has: a front blade surface (16) that is parallel to the rotation axis and curved in a forward direction of rotation; and a rear blade surface (17) that is disposed behind the front blade surface (16), is parallel to the rotation axis and curved in a forward direction of rotation, and has a curvature depth smaller than that of the front blade surface (16). The front blade surface (16) has: a first curved surface (19) that constitutes a portion away from the rotation axis and is formed to extend from the outer end (21) of the rotating blade (15) toward the front in the rotation direction; and a second curved surface (20) that constitutes a portion close to the rotation axis (L1) and is formed to extend from the apex (18) of the front blade surface (16) toward the rear in the rotation direction and is connected to the inner end (22), and its surface length when viewed from above is shorter than that of the first curved surface (19). On the first curved surface (19), a recess (23) is formed at a position closer to the outer end (21) than the apex (18) of the front blade surface (16). Thus, a rotating blade that can improve rotation efficiency is provided in a rotating blade that rotates in response to fluid.

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