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Self-acting variable pitch vertical axis wind turbine

a vertical axis, self-acting technology, applied in the direction of motors, dynamo-electric machines, engine fuctions, etc., can solve the problems of doubtful commercial viability and achieve the effect of simple mechanical

Inactive Publication Date: 2009-04-02
ST GERMAIN ANDRE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is an improved self-acting variable pitch vertical axis wind turbine. It includes a fixed mounting base, a fixed shaft, an electric power generator, and a plurality of blades. Each blade has a paddle asymmetrically carried by a spindle, and the spindle rotates about the rotor about a spindle axis. The blade paddles are offset from the mid-point of the blade and may be of different shapes and forms, such as sport, nature, politics, or advertising. The technical effects of the invention include a simple mechanical means of effecting a variation in turbine blade pitch without the need for external and power consumptive actuation, and the ability to generate electrical power from wind."

Problems solved by technology

As will readily be appreciated, the cost and complexity of such equipment with concomitant maintenance requirements render it of doubtful commercial viability.

Method used

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  • Self-acting variable pitch vertical axis wind turbine
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  • Self-acting variable pitch vertical axis wind turbine

Examples

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Embodiment Construction

[0031]With reference to the annexed drawings the preferred embodiment of the present invention will be herein described for indicative purpose and by no means as of limitation.

[0032]Now referring to FIGS. 1 and 2, a self-acting variable pitch vertical axis wind turbine in accordance with an embodiment 1 of the present invention (hereinafter referred to as a ‘SAVPVAWT’) comprises a fixed mounting base 2 shown bolted to a stand, for example a pylon 4. The SAVPVAWT has a rotatable impeller generally indicated by the reference number 6 mounted on the base 2, the impeller 6 having five substantially planar blade paddles 8, defining respective paddle planes, generally equi-spaced circumferentially thereof and extending from a hub 10 housing an electric generator 12 with power delivery cables 13 extending therefrom.

[0033]The generator 12 comprises a stator 14 and a rotor 16, which latter consists of a split casing 18 having an upper half and a complementary lower half 20, 22 respectively. ...

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Abstract

A self-acting variable pitch vertical axis wind turbine is provided with asymmetrically mounted blade paddles rotatably mounted for limited movement such that at one limit of the rotation, a paddle is operational to rotate the impeller and at the other limit of the rotation the paddle feathers.

Description

FIELD OF THE INVENTION[0001]The present invention is related to the field of self-acting variable pitch vertical axis wind turbines, and is more particularly directed to such turbines employed for generating power.BACKGROUND OF THE INVENTION[0002]Self-acting variable pitch vertical axis wind turbines (SAVPVAWTs) are known and have been developed to compensate for wind direction variations to the extent that approximately constant and predicable performance may be achieved with improved efficiency.[0003]For example US Patent Application Publication No. 20070014658 to Mollinger describes a windmill provided with a vertical shaft from which radially extend four arms at right angles to each other, each of the four arms having attached thereto a variable pitch, flat three section blade mounted on a vertical axis and a booster curtain within a structural frame located next to the blade. The pitch of the blade is changed by a variable-speed electric motor and the booster curtain is opened ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01D15/10
CPCF03D3/067F05B2240/211Y02E10/74F05B2260/506F05B2240/218
Inventor ST-GERMAIN, ANDRE'SIGOUIN, RAYMONDROBICHAUD, JACQUES
Owner ST GERMAIN ANDRE