Title:
VERTICAL AXIS WIND TURBINE AND WIND POWER GENERATOR
Document Type and Number:
Japanese Patent JP2018155129
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vertical axis wind turbine in which a length of winglet in respect to an entire length of a blade is made to show the most suitable value in such a way that a rotation energy conversion efficiency may become well.SOLUTION: A vertical axis wind turbine has a blade 9 that is connected to a vertical main shaft. The blade 9 includes a main blade part 10 extending in parallel with the vertical main shaft and winglets 11 extending from both ends while being slant folded from both ends of the main blade part 10 to the vertical main shaft. A lateral cross sectional shape of the blade 9 shows a shape in such a way that either the radial outside or inside surface is gradually bulged out from both front and rear ends in the rotating advancing direction of the blade so as to cause the thickness in a radial direction at a location near the front end of the blade 9 in its rotating advancing direction to become the most thickness part. The winglets 11 have a shape that a width of the blade 9 in its rotating advancing direction is made narrow. A rate between a length L1 of a half of the length in an axial direction of an entire blade and an axial length L2 of the winglets 11 is in a range of 10% to 20%.SELECTED DRAWING: Figure 3
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Inventors:
ITO TAKESHI
Application Number:
JP2017050999A
Publication Date:
October 04, 2018
Filing Date:
March 16, 2017
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F03D80/00; F03D3/06
Domestic Patent References:
| JP2016205204A | 2016-12-08 |
Foreign References:
| WO2005038251A1 | 2005-04-28 |
Attorney, Agent or Firm:
Masashi Noda
Shuji Sugimoto
Shuji Sugimoto