Title:
翼及びそれを用いた風車
Document Type and Number:
Japanese Patent JP6800030
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a blade and a wind turbine in which they have a simple structure and their prices are cheap to generate a running torque by both wind in parallel with a revolving shaft and wind perpendicular to the revolving shaft.SOLUTION: This invention relates to a blade at a wind turbine constituted by several blades arranged around a revolving shaft of a revolving base plate and fixed there. The blade has a cross-section flow line shape in which an arc projection long side 10 and a short side 11 are extended from a front edge and crossed at a rear edge and its thickness varies continuously, a size of curvature at a neutral line (d) between the long side and the short side of the blade section varies continuously from a blade extremity end toward a blade base part and a profile reference line perpendicular to a blade section varies continuously or intermittently or forms a curved shape bent with a predetermined curvature radius. When a code of the curvature at the curvature of the neutral line of the blade cross-section shape is defined as a positive value if the neutral line shows a convex shape toward an orientation spaced apart from the center of the curvature radius of the profile reference line, a size of the curvature at the neutral line (d) on the blade extremity end side is in a range of the positive value of 0% or more and 8% or less and a size of the curvature at the blade base part side is in a range of the negative value of 0% to -8% and the profile having the aforesaid cross-sectional shape is arranged along the profile reference line.SELECTED DRAWING: Figure 1
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Inventors:
Yutaka Hara
Toshiyuki Takao
Toshiyuki Takao
Application Number:
JP2017011883A
Publication Date:
December 16, 2020
Filing Date:
January 26, 2017
Export Citation:
Assignee:
National University Corporation Tottori University
Pioneer Seiko Co., Ltd.
Pioneer Seiko Co., Ltd.
International Classes:
F03D1/06; F03D3/06
Domestic Patent References:
| JP2004316551A | ||||
| JP2015214962A |
Foreign References:
| EP2878825A2 | ||||
| US20100322770 | ||||
| CN105247207A |
Attorney, Agent or Firm:
Hisao Ishii