Vertical axis wind driven generator with higher wind energy utilization efficiency
A wind turbine and vertical axis technology, which is applied in the field of power generation devices and high-efficiency vertical axis wind turbines, can solve the problems of low resistance-type wind energy utilization efficiency, poor power generation performance at low wind speed, and poor self-starting performance of lift-type blades.
Active Publication Date: 2012-09-19
山东中能华源海上风电集团有限公司
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Problems solved by technology
At present, vertical axis generators have problems such as poor self-starting performance of lift-type blades, poor power generation performance at low wind speeds, and low utilization efficiency of drag-type wind energy. Therefore, optimizing the blade structure is the key to solving the above problems.
Method used
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Embodiment Construction
[0263] see figure 1 , figure 2 , the present invention is a large vertical axis wind power generator with a new design for the blades and cross braces. Its composition includes a central column 1, blades 3 and cross braces 2. distribution, the blades are connected to the central column by cross braces. The cross-sectional shape of the blade 3 of the present invention is the same as that of the cross-bracing bar 2, and one side of the truncated blade is a hook-shaped end 3-1. The hook ends of the hooked ends of the braces are positioned upwardly, and the hooked ends of the blades engage with the hooked ends of the blades. The number of blades of the fan of the present invention is ≥ 2, the illustration shows 5 blades, and 2-12 blades are usually used.
[0264] see image 3 , the sectional profile of the blade 2 and the cross brace of the present invention is a closed curve composed of four curves O-Q, O-R, P-Q, and P-R, wherein the O point and the R point are two endpoints...
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The invention discloses a vertical axis wind driven generator with higher wind energy utilization efficiency, which comprises a center pole, blades and a cross stay bar, wherein all blades are arranged vertically and are uniformly distributed relative to the axis of the center pole; the blades are connected with the center pole through the cross stay bar; after improvement, the section type profile of each blade is composed of four curves, namely O-Q, O-R, P-Q, and P-R; and one side of the section type of each blade is provided with a hook shape end which is arranged towards outside. In the invention, through the optimization design of the section type of the blades and the cross stay bar, wind resistance can be increased obviously, the wind resistance difference can be improved, and in particular the generating capacity of a draught fan at a lower wind speed can be improved greatly. The contrast test shows that compared to similar vertical axis wind driven generator, the voltage of the generator provided by the invention can be improved by approximately 10 times at a low wind speed, and the generating voltage can be improved by more than 50% at a high wind speed.
Description
technical field [0001] The invention relates to a power generating device, in particular to a high-efficiency vertical axis wind power generator, which belongs to the technical field of wind power generation. Background technique [0002] According to the installation orientation of the main shaft, wind turbines are divided into horizontal axis and vertical axis. So far, horizontal axis wind turbines are more commonly used. Although horizontal axis generators are widely used, there are some structural problems, such as: yaw, propeller and other windward structures are required to control the windward side to increase the resistance difference, which makes the structure of the generator complex, takes up many parts and is easy to cause malfunction. Due to the structural defects of horizontal axis generators, in recent years, the technology of vertical axis generators has developed rapidly and has become more and more widely used. The vertical axis generator can increase the...
Claims
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IPC IPC(8): F03D3/06
CPCY02E10/74
Inventor 张远林
Owner 山东中能华源海上风电集团有限公司