CN211474324U - Wind power blade capable of improving generated energy of wind generating set - Google Patents

Abstract

The utility model discloses a can promote wind power generation set generated energy's wind-powered electricity generation blade, including the blade body, install the flank of inside cavity on the regional suction surface of blade root of blade body, the flank extends along blade chord length direction, nevertheless do not surpass blade root region, be connected through many vaulting poles between flank and the blade body, these many vaulting poles distribute along flank length direction, and the both ends of every vaulting pole are provided with a support that is used for increasing installation area of contact respectively, the vaulting pole is connected with blade body and flank respectively through its both ends support, bond together through the bonding glue between support and blade body or the flank, and can laminate the surface of blade body or flank completely. The utility model discloses an increase the flank on blade root region, can effectively increase the ability that the blade caught wind energy, restrain the air separation, prevent the cross-section stall, improve wind energy utilization efficiency to improve this target of unit generated energy.

Description

A wind power blade that can increase the power generation of a wind turbine

technical field

The utility model relates to the technical field of wind power generation, in particular to a wind power blade capable of increasing the power generation of a wind power generating set.

Background technique

Wind power is considered to be one of the cleanest and most environmentally friendly energy sources currently available, and in recent years, wind power generation is forming a boom in the world, gaining more and more favor. The principle of wind power generation is to use the wind to drive the blades of the wind turbine to rotate, and then increase the speed of rotation through the speed increaser to drive the generator to rotate and generate electricity. Converting the kinetic energy of the wind into mechanical kinetic energy, and then converting the mechanical energy into electrical kinetic energy, is wind power generation.

The blade is one of the most critical and important components in the wind turbine. As the wind catching device in the unit, the pros and cons of its design will directly affect the conversion efficiency of wind energy, thereby affecting the annual power generation of the unit. important part. How to design blades with excellent performance to improve the wind energy utilization rate of the unit, thereby increasing the power generation, has always been a major difficulty in the design of wind turbines.

The angle of attack of the section near the blade root is very large, generally exceeding the static stall angle of attack. Under the influence of tower shadow effect, incoming turbulence, wind shear, etc., dynamic stall will occur in part of the section, and airflow is prone to occur on the leeward side of the blade. separation phenomenon.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and propose a wind power blade that can increase the power generation of the wind turbine. The air flow is separated, preventing the stall of the section, and improving the efficiency of wind energy utilization, thereby increasing the power generation of the unit.

In order to achieve the above purpose, the technical solution provided by the present utility model is: a wind power blade capable of increasing the power generation of a wind turbine, comprising a blade body, and a suction surface of the blade root region of the blade body is installed with an internal cavity. Side wings, the side wings extend along the chord length direction of the blade, but do not exceed the blade root area of the blade, the side wings and the blade body are connected by a plurality of struts, the plurality of struts are distributed along the length of the side wings, and each Both ends of the root support rod are respectively provided with a support for increasing the installation contact area, the support rod is respectively connected with the blade body and the side wing through the support at both ends, and the support is connected with the blade body or the side wing. They are bonded together by adhesive glue, and can completely fit the surface of the blade body or the flanks.

Further, the flank is a laminar airfoil with a relative thickness of less than 21%, that is, the ratio of the maximum distance between the upper and lower airfoils of the flank to the chord length of the flank is less than 21%, so as to ensure that the airflow does not separate on the flank surface.

Further, the periphery of the bonding area between the blade body, the side wings and the support is covered with sealant to ensure that rainwater will not enter the bonding area during the subsequent operation of the blade.

Further, the surfaces of the strut and the support are rounded to reduce the resistance to airflow.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. The original structure and aerodynamic shape of the blade are not changed, and the blade is produced in the original way.

2. It can effectively improve the overall aerodynamic performance of the blade and increase the power generation.

3. It can effectively inhibit the separation of airflow in the trailing edge area of the suction surface of the blade root.

Description of drawings

FIG. 1 is a schematic structural diagram of the wind turbine blade according to this embodiment.

FIG. 2 is one of the partial schematic diagrams of the wind power blade according to this embodiment.

FIG. 3 is the second partial schematic diagram of the wind turbine blade according to this embodiment.

Detailed ways

The present utility model will be further described below in conjunction with specific embodiments.

Referring to FIG. 1 to FIG. 3 , the wind power blade provided by the present embodiment that can increase the power generation of the wind turbine includes a blade body 1 , and a side wing 2 is installed on the suction surface of the blade root region of the blade body 1 , so The inner cavity of the flank 2 is about 1m wide and extends along the chord length of the blade (the length can be determined according to the length of the blade), but does not exceed the blade root area of the blade. The cross-sectional shape is laminar airfoil, and the relative thickness is less than 21% , that is, the ratio of the maximum distance between the upper and lower airfoils of the flank to the chord length of the flank is less than 21% to ensure that the airflow does not separate on the surface of the flank. The flank 2 can be made of glass fiber reinforced plastic or other lightweight high-strength materials. Hand lay-up molding on the prefabricated mold, on the basis of satisfying the structure, to ensure the smoothness of the surface of the flank; the flank 2 and the blade body 1 are connected by a plurality of struts 3, the plurality of struts 3 along the flank Distributed in the length direction, the support rod 3 can be made of light alloy, the height of the support rod is about 300mm, and the two ends of each support rod 3 are respectively provided with a support 4 for increasing the installation contact area, the support rod 3 The two ends of the supports 4 are respectively connected with the blade body 1 and the side wings 2, and the support 4 and the blade body 1 or the side wings 2 are bonded together by adhesive glue, and the bonding effect can be improved by heating. It is best to apply sealant all around the bonding area to ensure that rainwater will not enter the bonding area during the subsequent operation of the blade. In addition, the support 4 can completely fit the surface of the blade body 1 or the side wings 2, and the support rod The surfaces of 3 and the support 4 need to be rounded to ensure that when the airflow passes through, the resistance of the strut 3 and the support 4 to the airflow will be minimized.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, any changes made according to the shape and principle of the present invention shall be covered by the protection of the present invention. within the range.

Claims (4)

1. A wind power blade capable of increasing the power generation of a wind turbine, comprising a blade body, characterized in that: a side wing of an internal cavity is installed on the suction surface of the blade root region of the blade body, and the side wing is along the blade chord It extends in the long direction, but does not exceed the blade root area of the blade. The side wings and the blade body are connected by a plurality of struts. The plurality of struts are distributed along the length of the side wings, and two ends of each strut are respectively provided with A support for increasing the installation contact area, the support rod is connected with the blade body and the side wings respectively through the supports at both ends, and the support and the blade body or the side wings are bonded together by adhesive glue , and can fully fit the surface of the blade body or flank. 2 . The wind turbine blade capable of increasing the power output of a wind turbine according to claim 1 , wherein the flank is a laminar airfoil with a relative thickness less than 21%, namely the upper and lower airfoils of the flank. 3 . The ratio of the maximum distance to the flank chord length is less than 21% to ensure that the airflow does not separate on the flank surface. 3. A wind power blade capable of increasing the power generation of a wind turbine according to claim 1, wherein the periphery of the bonding area of the blade body, the flanks and the support is covered with sealant to ensure subsequent operation of the blade Rainwater will not enter the above-mentioned bonding area during the process. 4 . The wind turbine blade capable of increasing the power output of a wind turbine according to claim 1 , wherein the surfaces of the strut and the support are rounded to reduce the resistance to airflow. 5 .

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