Vertical axis wind turbine blades
A technology of wind-driven generators and vertical shafts, applied to wind-driven engines, wind-powered engines at right angles to the wind direction, engines, etc., which can solve the problems that the blades cannot meet the requirements of wind-driven generators well, so as to reduce rotation safety problems and reduce Weight and production cost, good effect of collecting wind energy
Inactive Publication Date: 2015-09-16
QINHUANGDAO FENGRIHE TECH
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Problems solved by technology
Therefore, the blades designed by aviation airfoils cannot meet the requirements of wind turbines very well.
Method used
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[0015] The specific embodiment of the present invention will be described with reference to the accompanying drawings.
[0016] As shown in the accompanying drawing, the blade of the vertical axis wind power generator is a vertically installed blade, and the blade is an asymmetric wing airfoil whose outer side camber is greater than the inner side camber. The upper part 1 and the lower part 2 of the blade are straight blade segments, and the middle part 3 is a curved blade segment curved outward in an arc shape. The thickness of the curved blade segment decreases from the middle to the upper and lower ends and is smooth with the upper and lower straight blade segments. The transition is connected to form a straight and curved combined blade in which the upper and lower parts are straight blade segments and the middle part is a curved blade segment. A choke cavity 4 is arranged in the middle of the blade. The opening of the choke cavity 4 is lip-shaped and located inside the tr...
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A blade of a vertical-axis wind turbine is a vertical running blade. The cross section of the blade is in the shape of an asymmetrical airfoil with the curvature of the outer side higher than that of the inner side. Both the upper portion and the lower portion of the blade are straight blade sections, the middle of the blade is a bending blade section bending outwards, the thickness of the bending blade section is reduced gradually from the middle to the upper end and the lower end, and the bending blade section is in smoothly transitional joint with the upper straight blade section and the lower straight blade section, so that the straight and bending combined blade consisting of the upper straight blade section, the lower straight blade section and the middle bending blade section is formed. Besides, a wind resistant cavity with an opening located on the inner side of the back edge is arranged in the middle of the blade. The technical scheme of the blade further includes that the front edge and the back edge of the middle of the blade are curved and protruded outwards so that the blade is unequal in width, and further the blade has a hollow structure. Compared with the existing blade of the vertical-axis wind turbine, the blade has the advantages of higher torque, higher tip speed and wind energy conversion rate and fine starting performance.
Description
technical field [0001] The invention relates to a wind power generator, in particular to a blade of a vertical axis wind power generator. Background technique [0002] At present, the blades of vertical axis wind turbines mainly include resistance type and lift type. The resistance type blade uses the resistance generated by the air flow on the blade to do work, and has a large torque and good starting performance, but the tip speed ratio and wind energy The conversion rate is low. The lift-type blade uses the pressure difference generated by the air flow on the blade to do work, and has a high tip speed ratio and wind energy conversion rate, but it is difficult to start with a small torque. Most of the lift-type blades disclosed in the prior art follow the design of the aviation airfoil, that is, the aircraft wing, and the aircraft wing is an active body relative to the air, and the air is a passive body. In addition, the relative speed between the aircraft wing and the ai...
Claims
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IPC IPC(8): F03D3/06
CPCY02E10/74
Inventor 杨乐关俊生谢游洋谢竞博郭垲谢静梅
Owner QINHUANGDAO FENGRIHE TECH