Vertical axis wind turbine, and wind power generating device and lighting facility comprising same

Patent metadata

Field	Value
Publication number	US-11614070-B2
Application number	US-202017102896-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	May 29, 2018
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A vertical axis wind turbine (2) includes a vertical rotation shaft (3a) and a plurality of vertical blades (5) arranged around the rotation shaft and attached to the rotation shaft through an arm (6a, 6b). Each of the blades (5) includes a blade main part (5a) and blade-tip inclined parts (5b) extending from upper and lower ends of the blade main part (5a) toward the rotation shaft (3a). Each of the blade-tip inclined parts (5b) has a smaller thickness than a thickness of the blade main part (5a). A wind power generating device (1) includes a vertical axis wind turbine (2) having the above configuration and a generator (3).

First claim

What is claimed is:

1. A vertical axis wind turbine comprising:
a vertical rotation shaft; and
a plurality of vertical blades arranged around the vertical rotation shaft and attached to the vertical rotation shaft through an arm,
wherein
each of the plurality of vertical blades includes a blade main part and a pair of blade-tip inclined parts, each of the pair of blade-tip inclined parts having an end which extends from upper and lower ends of the blade main part toward the vertical rotation shaft and another end which does not extend from the upper and lower ends of the blade main part,
each of the blade-tip inclined parts has a smaller thickness than a thickness of the blade main part, such that a ratio of a thickness of each of the blade-tip inclined parts to the thickness of the blade main part is 1 to 10, or less, and
the thickness of each of the blade-tip inclined parts, which extend from the upper and lower ends of the blade main part toward the vertical rotation shaft, is constant from a base end to a tip end of the blade-tip inclined part.

2. The vertical axis wind turbine as claimed in claim 1 , wherein each of the blade-tip inclined parts is made of a steel plate or a resin material.

3. The vertical axis wind turbine as claimed in claim 1 , wherein the blade main part has a substantially constant cross-sectional shape over an entire length of the blade main part.

4. The vertical axis wind turbine as claimed in claim 1 , wherein the blade main part has a lift type cross-sectional shape for receiving a wind force to generate lift.

5. A wind power generating device comprising:
the vertical axis wind turbine as claimed in claim 1 , and
a generator configured to generate electricity from rotation of the vertical axis wind turbine transmitted to the generator.

6. A lighting facility having a power generation function comprising:
the wind power generating device as claimed in claim 5 ;
a photovoltaic panel;
a secondary battery configured to store electricity generated by the wind power generating device and the photovoltaic panel; and
a lighting fitting configured to light up using the electricity stored in the secondary battery; and
a support column supporting the wind power generating device, the photovoltaic panel, the secondary battery, and the lighting fitting.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Ito Takeru
• Kawase Tatsuo
• Hayashi Tatsuya

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21W2131/103

  of streets or roads · CPC title

• F05B2260/42

  Storage of energy · CPC title

• F05B2220/708

  Photoelectric means, i.e. photovoltaic or solar cells · CPC title

• F21S9/035

  the solar unit being integrated within the support for the lighting unit, e.g. within or on a pole · CPC title