Vane structure for vertical axis wind power generator

Abstract

A vane for vertical axis wind power generator includes a vane body defining a rearward recess and having a front plate portion with a through hole; a first arcuate guide bar located in the recess with a second end connected to the vane body and a first end located in the through hole; an openwork screen fitted in the through hole and connected to the first end of the first arcuate guide bar; and a first movable baffle unit slidably fitted around the first arcuate guide bar and pivotally connected to the vane body to openably cover the openwork screen. When the rearward recess is against the wind, the first movable baffle unit covers the openwork screen for the rearward recess to effectively intercept the wind. When the rearward recess is before the wind, the first movable baffle unit naturally opens to reduce the air resistance to the vane.

Description

RELATED APPLICATIONS[0001]This application claims priority to China Application Serial Number 200810180782.6, filed Dec. 2, 2008, which is herein incorporated by reference.FIELD OF THE INVENTION[0002]The present invention relates to a vane structure for a vertical axis wind power generator, and more particularly to a vane for vertical axis wind power generator that includes a movable baffle unit to close or open a through hole on the vane to thereby effectively intercept the wind or reduce the air resistance to the vane, respectively.BACKGROUND OF THE INVENTION[0003]A vertical axis wind power generator has a vertical main shaft, on which a plurality of vanes are mounted to space from one another along a circumferential surface of the main shaft. Each of the vanes has a front side and a rear side that are generally two corresponding outward curved face and inward curved face, respectively. The inward curved face of the vane is located against the wind to intercept the flow of air cur...

AI Technical Summary

Benefits of technology

[0006]A primary object of the present invention is to provide a vane structure for vertical axis wind power generator, which, on the one hand, reduces air resistance to a vane body and, on the other hand, allows the vane body to effectively intercept the wind for driving the main shaft to rotate.

[0007]To achieve the above and other objects, the vane structure for vertical axis wind power generator according to a preferred embodiment of the present invention includes a plurality of vanes mounted around and spaced along a main shaft of the wind power generator. Each of the vanes includes a vane body, a first arcuate guide bar, an openwork screen, and a first movable baffle unit. The vane body has a body portion that defines a rearward recess, and includes a front plate portion, on which a through hole is formed. The first arcuate guide bar is located in the rearward recess, and having a first end and an opposing second end; the second end is fixedly connected to the body portion and the first end is located at a center of the through hole. The openwork screen is fitted in the through hole and connected to the first end of the first arcuate guide bar. The first movable baffle unit is located in the rearward recess and slidably fitted around the first arcuate guide bar, and is pivotally turnably connected to the front plate portion via a baffle support bar, such that the first movable baffle unit openably covers the openwork screen from one side adjacent to the rearward recess. When the rearward recess of the vane is located against the wind, the first movable baffle unit is blown by the wind to cover the openwork screen and accordingly closes the through hole on the front plate portion for the rearward recess of the vane body to effectively intercept the wind. On the other hand, when the rearward recess of the vane is located before the wind, the first movable baffle unit naturally opens the through hole on the front plate portion to reduce the air resistance to the rotation of the vane. That is, the vane of the present invention with the rearward recess located against the wind can effectively utilize the wind force without being adversely affected by an opposing vane that has a rearward recess located before the wind at the same time. Thus, the main shaft of the wind power generator can be more easily driven by the vanes to rotate.

Problems solved by technology

Since the wind force capable of driving the main shaft to rotate is reduced, the effect of wind power generation is disadvantageously reduced accordingly.

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