Title:
VERTICAL SHAFT WINDMILL
Document Type and Number:
WIPO Patent Application WO/2012/073320
Kind Code:
A1
Abstract:
[Problem] Conventional vertical shaft windmills had the issue of blade rotation speed becoming too fast in high wind speed areas, causing malfunctions and damage to blades, the shaft, and generators, etc. The purpose of the present invention is to provide a vertical shaft windmill capable of suppressing blade rotation speed such that the blade rotation speed does not become too high in high wind speed areas. [Solution] In order to solve said issue, the present invention provides a vertical shaft windmill comprising a cylindrical rotating shaft and a plurality of blades supported by the cylindrical rotating shaft via a blade supporting arm. The sum of the lengths of the plurality of blades in the rotating direction is 20%-40% of the length of the circumference trajectory of the blades.
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Inventors:
SUGISAKI KEN (JP)
Application Number:
PCT/JP2010/071334
Publication Date:
June 07, 2012
Filing Date:
November 30, 2010
Export Citation:
Assignee:
CNO CO LTD (JP)
SUGISAKI KEN (JP)
SUGISAKI KEN (JP)
International Classes:
F03D3/06
Domestic Patent References:
| WO2009107101A2 | 2009-09-03 |
Foreign References:
| JP2009150319A | 2009-07-09 | |||
| JPS5732076A | 1982-02-20 | |||
| JP2006207475A | 2006-08-10 | |||
| JP2006283713A | 2006-10-19 | |||
| JP2003206848A | 2003-07-25 |
Attorney, Agent or Firm:
KUDO, ICHIRO (JP)
Ichiro Kudo (JP)
Ichiro Kudo (JP)
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Claims: