ROTARY BLADE, ROTATING DEVICE, AND POWER GENERATION DEVICE
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United States of America Patent
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Issued Date -
Sep 12, 2024
app pub date -
Oct 22, 2021
filing date -
Jan 29, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A wind power generation device includes rotary blades that each includes a front blade surface parallel to the rotation axis and curved to protrude frontward, and a rear blade surface, being parallel to the rotation axis, curved so as to be concave frontward, and having a smaller curve depth than the front blade surface. The front blade surface includes a first curved surface far from the rotation axis and formed frontward from an outer end, and a second curved surface close to the rotation axis and formed rearward from a crest to connect to an inner end, a surface length thereof being smaller than that of the first curved surface. The first curved surface has recesses at positions closer to the outer end than to the crest of the front blade surface. Thus, the rotary blade rotates by receiving a fluid and can improve rotation efficiency.
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