Title:
LIFT-TYPE VERTICAL SHAFT WINDMILL
Document Type and Number:
WIPO Patent Application WO/2021/075201
Kind Code:
A1
Abstract:
Provided is a windmill having a rotary shaft that is not susceptible to fatigue failure. This windmill 100 is provided with a rotary shaft 110 extending in the vertical direction, a plurality of arms 120 that extend horizontally from the rotary shaft 110 and that are formed at a constant interval in a rotational direction, and a plurality of vanes 130 that are attached to the respective tips of the arms 120 so as to extend in the top-bottom direction, the rotary shaft 110 being rotated by lift forces generated by said vanes 130, wherein: cross sections of each of the vanes 130 have a uniform shape and a uniform area from the upper end of the vane 130 to the lower end of the the vane 130; when viewed from a direction in which the rotary shaft 110 extends, the respective vanes 130 are projected onto the entire circumference of a single virtual circular ring C centering on the rotary shaft 110; and the lengths of the vanes 130 are the same length in the vertical direction across the entire circumference.
Inventors:
ABE RIKIYA (JP)
ITO TAKAHIKO (JP)
ITO TAKAHIKO (JP)
Application Number:
PCT/JP2020/035170
Publication Date:
April 22, 2021
Filing Date:
September 17, 2020
Export Citation:
Assignee:
ABE RIKIYA (JP)
International Classes:
F03D3/06; F03B3/14; F03B13/26; F03B17/06; F03D7/04
Foreign References:
| JP2013541675A | 2013-11-14 | |||
| JP2017120050A | 2017-07-06 |
Attorney, Agent or Firm:
TOWA INTERNATIONAL PATENT FIRM (JP)
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