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.

1 . A vane structure for vertical axis wind power generator, comprising a plurality of vanes mounted around and spaced along a main shaft of the wind power generator, each of the vanes comprising:
 a vane body having a body portion that defines a rearward recess; the body portion including a front plate portion, on which a through hole is formed;   a first arcuate guide bar being located in the rearward recess, and having a first end and an opposing second end; the second end being fixedly connected to the body portion and the first end being located at a center of the through hole;   an openwork screen being fitted in the through hole and connected to the first end of the first arcuate guide bar; and   a first movable baffle unit being located in the rearward recess and slidably fitted around the first arcuate guide bar; the first movable baffle unit being pivotally turnably connected to the front plate portion via a baffle support bar, such that the first movable baffle unit is able to openably cover the openwork screen from one side adjacent to the rearward recess.   
     
     
         2 . The vane structure for vertical axis wind power generator as claimed in  claim 1 , wherein the body portion is provided on outer peripheral surfaces thereof with a plurality of parallelly and continuously arranged ridges and valleys, which are extended between a front and a rear side of the vane body. 
     
     
         3 . The vane structure for vertical axis wind power generator as claimed in  claim 1 , wherein the front plate portion has an outward curved front surface, and an area of the outward curved front surface surrounding the through hole is formed into a bell-shaped sunken portion. 
     
     
         4 . The vane structure for vertical axis wind power generator as claimed in  claim 3 , wherein the openwork screen includes a sleeve portion and a screen body connected to and located around the sleeve portion; the sleeve portion being fitted around the first end of the first arcuate guide bar, and the screen body being fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole; and the screen body having a plurality of openings formed thereon. 
     
     
         5 . The vane structure for vertical axis wind power generator as claimed in  claim 4 , wherein the first movable baffle unit includes a first sleeve and a first movable baffle connected to and located around the first sleeve; the first sleeve being slidably fitted around the first arcuate guide bar, and the first movable baffle normally covering the openwork screen from one side adjacent to the rearward recess. 
     
     
         6 . The vane structure for vertical axis wind power generator as claimed in  claim 5 , wherein the openwork screen and the first movable baffle unit have a first buffer spring provided therebetween, and a first and a second magnetic ring having the same polarity are respectively provided on the first buffer spring and the first movable baffle unit at contact faces thereof. 
     
     
         7 . The vane structure for vertical axis wind power generator as claimed in  claim 6 , wherein the vane further includes a stop unit, which includes a stop ring fixedly connected to the first arcuate guide bar near the second end thereof and a stop spring arranged on the first arcuate guide bar to one side of the stop ring facing toward the first end of the first arcuate guide bar. 
     
     
         8 . The vane structure for vertical axis wind power generator as claimed in  claim 7 , wherein the stop unit further includes a holding device being pivotally turnably connected to a lateral side of the stop ring, and the holding device including a control lever and a hook connected to the control lever; and wherein the first movable baffle unit is provided at positions corresponding to the control lever and the hook with a push bar and a retaining ring, respectively; and the holding device further including an outward projected release lever. 
     
     
         9 . A vane structure for vertical axis wind power generator, comprising a plurality of vanes mounted around and spaced along a main shaft of the wind power generator, each of the vanes comprising:
 a vane body having a body portion that defines a rearward recess; and the body portion including a front plate portion, on which a through hole is formed;   a first arcuate guide bar being located in the rearward recess, and having a first end and an opposing second end; the second end being fixedly connected to the body portion and the first end being located at a center of the through hole;   an openwork screen being fitted in the through hole and connected to the first end of the first arcuate guide bar;   a first movable baffle unit having openings formed thereon and being located in the rearward recess of the vane body behind the openwork screen; the first movable baffle unit including a second arcuate guide bar in the form of a sleeve slidably fitted around the first arcuate guide bar, and being connected to the front plate portion of the vane body via a pivot point on a baffle support bar, so that the first movable baffle unit is turnable about the pivot point to openably cover the openwork screen from one side adjacent to the rearward recess; and the second arcuate guide bar having a proximal end and a distal end, and a radially outward extended flange formed around the distal end; and   a second movable baffle unit being located in the rearward recess of the vane body behind the first movable baffle unit; the second movable baffle unit being slidably fitted around the second arcuate guide bar to openably cover the first movable baffle unit from one side adjacent to the rearward recess.   
     
     
         10 . The vane structure for vertical axis wind power generator as claimed in  claim 9 , wherein the body portion is provided on outer peripheral surfaces thereof with a plurality of parallelly and continuously arranged ridges and valleys, which are extended between a front and a rear side of the vane body. 
     
     
         11 . The vane structure for vertical axis wind power generator as claimed in  claim 9 , wherein the front plate portion has an outward curved front surface, and an area of the outward curved front surface surrounding the through hole is formed into a bell-shaped sunken portion. 
     
     
         12 . The vane structure for vertical axis wind power generator as claimed in  claim 11 , wherein the openwork screen includes a sleeve portion and a screen body connected to and located around the sleeve portion; the sleeve portion being fitted around the first end of the first arcuate guide bar, and the screen body being fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole; and the screen body having a plurality of openings formed thereon. 
     
     
         13 . The vane structure for vertical axis wind power generator as claimed in  claim 12 , wherein the first movable baffle unit includes a first sleeve and a first movable baffle connected to and located around the first sleeve; the first sleeve being fitted around the proximal end of the second arcuate guide bar, and the first movable baffle having a plurality of openings formed thereon. 
     
     
         14 . The vane structure for vertical axis wind power generator as claimed in  claim 13 , wherein the second movable baffle unit includes a second sleeve and a second movable baffle connected to and located around the second sleeve; the second sleeve being slidably fitted around the second arcuate guide bar, and the second movable baffle normally covering the openings on the first movable baffle from one side adjacent to the rearward recess. 
     
     
         15 . The vane structure for vertical axis wind power generator as claimed in  claim 14 , wherein the openwork screen and the first movable baffle unit have a first buffer spring provided therebetween, and a first and a second magnetic ring having the same polarity are respectively provided on the first buffer spring and the first movable baffle unit at contact faces thereof. 
     
     
         16 . The vane structure for vertical axis wind power generator as claimed in  claim 15 , wherein the first movable baffle unit and the second movable baffle unit have a second buffer spring provided therebetween. 
     
     
         17 . The vane structure for vertical axis wind power generator as claimed in  claim 16 , wherein the vane further includes a stop unit, which includes a stop ring fixedly connected to the first arcuate guide bar near the second end thereof and a stop spring arranged on the first arcuate guide bar to one side of the stop ring facing toward the first end, of the first arcuate guide bar. 
     
     
         18 . The vane structure for vertical axis wind power generator as claimed in  claim 17 , wherein the stop unit further includes a holding device being pivotally turnably connected to a lateral side of the stop ring and including a control lever and a hook connected to the control lever; and wherein the second arcuate guide bar is provided on the flange at positions corresponding to the control lever and the hook with a push bar and a retaining ring, respectively; and the holding device further including an outward projected release lever.