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Wind-capturing blade system

A blade system and blade technology, applied in the field of wind energy utilization, can solve the problems of high installation cost, difficult maintenance, high production and installation costs, and achieve the effects of improving life and reliability, reducing the total area occupied, and reducing strength requirements.

Inactive Publication Date: 2011-11-30
毕磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main problems of horizontal axis turbines are: (1) in the case of frequent changes in wind direction, horizontal axis turbines cannot work normally; (2) horizontal axis turbines need a wind correction system (yawmechanism) so that the rotating surface of the blade can face Facing (or against) the wind direction to capture maximum wind energy
These make the system structure of the horizontal axis turbine very complicated, and the production and installation costs are high, and maintenance is difficult
In addition, because the rectification operation requires considerable energy, the overall electromechanical energy conversion efficiency of the turbine is also reduced; (3) for large wind turbines, the single fan blade of the horizontal axis turbine must be very long
In order to adapt to very long wind blades, the turbine tower body must also be very long, which makes the transportation of the turbine very difficult, and the transportation fee accounts for a high proportion in the system cost; (4) because the tower body is very high and the wind blades are very long, The generator, gear and deviation correction system of the horizontal-axis turbine must be installed on the top of the tower, so the installation of the turbine is very difficult, requiring many large-scale installation equipment, and the installation cost is very high; (5) All the blades of the horizontal-axis turbine only rely on the main shaft of the wind blade support, and the blades are very long, so that the blades will generate multi-dimensional strong vibration under the action of wind force during operation
These vibrations will be transmitted to the shaft of the gearbox connected in series with the generator, making the gearbox easily damaged

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Figure 3-Figure 11 A specific embodiment of the invention is shown.

[0065] like image 3 As shown, the blade system includes 6 leaf frames, and 3 blades 21 are mounted on each leaf frame.

[0066] like Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the leaf frame is a rectangular frame composed of a leaf frame top support rod 232, a leaf frame bottom support rod 233, a leaf frame inner rod 234 and a leaf frame outer rod 235, and three blade shafts 22 are uniformly arranged on the leaf frame. There are three blade bearing support heads 222 correspondingly arranged on the blade holder inner rod 234 and the blade holder outer rod 235 respectively, each blade bearing support head 222 is equipped with a blade bearing, and the two ends of each blade shaft 22 are pivotally connected to the blade holder respectively. In the blade bearings in the two corresponding blade bearing support heads 222 on the inner side rod 234 and the blade holder outer rod 235, e...

Embodiment 2

[0074] Figure 12 , Figure 13 , Figure 14 and Figure 15 A second specific embodiment of the invention is shown.

[0075] like Figure 12 As shown, the difference between this embodiment and Embodiment 1 is that: the blade shaft 22 is parallel to the center line of the blade system, and the blade bearing support head 222 is respectively installed on the corresponding top support rod 232 of the blade frame, the bottom support rod 233 of the blade frame or the blade frame. on the frame spacer bar 236; the blade stopper 224 is arranged on the leaf frame inner rod 234 and the leaf frame outer rod 235; see Figure 14 , along the axis line of the blade shaft 22, the surface of the blade 21 is divided into a large leaf area 212 and a small leaf area 211, the right half of each blade 21 is the large leaf area 212, the left half is the small leaf area 211, and the large leaf area The area of ​​region 212 is larger than the area of ​​leaflet region 211 .

[0076] Figure 13 It ...

Embodiment 3

[0079] Figure 16 A third specific embodiment of the invention is shown.

[0080] The difference between this embodiment and Embodiment 2 is that the protection wheel 11 is replaced by six protection heads 12, and a certain gap is reserved between each protection head 12 and the tower body of the supporting tower 2. If the tilt of the frame deviates too much from the axis of the main shaft of the turbine, the corresponding protection head 12 will abut against the body of the supporting tower 2 to protect the blade system.

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Abstract

The invention provides a blade system for catching wind power, comprising a blade and a blade rack, wherein the blade is articulated on the blade rack and the blade and the blade rack can relatively rotate; the surface of the blade is divided into a big blade area and a small blade area along an articulated axes, wherein the area of the big blade area is bigger than that of the small blade area; and the blade is provided with a limiting device capable of limiting the rotating limit position of the blade. A turbine system adopting the blade system has high use ratio of wind energy, high reliability, small land occupation area, low cost, wide applicable scope and automatic starting.

Description

【Technical field】 [0001] The invention relates to wind energy utilization technology, in particular to a blade system with high utilization rate of wind energy and favorable self-starting of equipment. 【Background technique】 [0002] As an effective way to obtain clean energy, wind energy utilization has great room for development. At present, the main form of wind energy utilization is to directly convert wind energy into mechanical energy, or to convert natural wind energy into electrical energy with the help of wind generators. In some areas, wind power has even become the main source of electricity. [0003] Wind turbines are currently the main form of commercialized wind power generators, most of which are horizontal-axis wind turbines. During the operation of the horizontal axis turbine (Horizontal-axis turbine), the rotation axis of the blade is in the horizontal direction, and the normal direction of the rotation surface of the blade is parallel to the wind force. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D3/00F03D3/06F03D11/00F03D13/20
CPCY02E10/74Y02E10/72
Inventor 毕磊
Owner 毕磊