阅读说明：本技术 一种风电叶片降噪后缘结构 (Wind power blade noise reduction trailing edge structure ) 是由 黄轩晴 高猛 孙松峰 李军向 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种风电叶片降噪后缘结构,包括后缘贴片、锯齿降噪片、梳流结构单元,后缘贴片附连在叶片展向35％-98％位置对应的后缘区段表面上或者在叶片全部的后缘区段表面上,并沿自身长度方向形成有多个供锯齿降噪片安装的安装位,两两安装位之间设有一根安装柱,锯齿降噪片与后缘贴片之间采用转轴铰链形式相连接,锯齿降噪片能够随流过叶片后缘区段的气流的速度和方向的改变做相应的转动调整,梳流结构单元与安装柱之间采用球形铰链形式相连接,两两相邻的锯齿降噪片之间设有一个梳流结构单元,梳流结构单元能够随相邻锯齿降噪片之间迎风面和背风面的合并气流的方向的改变做相应的转动调整。本发明可以更好的降低叶片气流噪声,提高叶片效率。(The invention discloses a wind power blade noise reduction trailing edge structure, which comprises a trailing edge patch, a sawtooth noise reduction sheet and a combing structure unit, wherein the trailing edge patch is attached to the surface of a trailing edge section corresponding to 35% -98% of the spanwise position of a blade or the surface of the whole trailing edge section of the blade, and a plurality of mounting positions for mounting the sawtooth noise reduction sheets are formed along the length direction of the sawtooth noise reduction sheet, a mounting column is arranged between every two mounting positions, the sawtooth noise reduction sheets are connected with the rear edge patch in a rotating shaft hinge mode, the sawtooth noise reduction sheets can be correspondingly rotationally adjusted along with the change of the speed and the direction of air flow flowing through the rear edge section of the blade, the combing flow structure units are connected with the mounting columns in a spherical hinge mode, a combing flow structure unit is arranged between every two adjacent sawtooth noise reduction sheets, and the combing flow structure units can be correspondingly rotationally adjusted along with the change of the direction of combined air flow of a windward side and a leeward side between the adjacent sawtooth noise reduction sheets. The invention can better reduce the airflow noise of the blade and improve the efficiency of the blade.)

1. The utility model provides a wind-powered electricity generation blade trailing edge structure of making an uproar that falls which characterized in that: the novel blade comprises a rear edge patch, sawtooth noise reduction sheets and a combing structure unit, wherein the rear edge patch is attached to the surface of a rear edge section corresponding to 35% -98% of the span direction of the blade or the surface of the whole rear edge section of the blade, a plurality of mounting positions for the sawtooth noise reduction sheets to be mounted in a one-to-one correspondence manner are formed along the length direction of the rear edge patch, a mounting column for the combing structure unit to be mounted is arranged between every two mounting positions, the sawtooth noise reduction sheets are connected with the rear edge patch in a rotating shaft hinge manner, every two adjacent sawtooth noise reduction sheets are separated by the mounting column, and relative to the fixed rear edge patch, the sawtooth noise reduction sheets can be correspondingly rotated and adjusted along with the change of the speed and the direction of airflow flowing through the rear edge section of the blade so as to weaken noise generated by the interaction of the airflows in different directions and the rear edge section of the blade and further improve the working, the comb flow structure unit is connected with the mounting columns in a spherical hinge mode, a comb flow structure unit is mounted between every two adjacent sawtooth noise reduction pieces and is just positioned at a vacant position defined by tooth tip parts of the two adjacent sawtooth noise reduction pieces and the mounting column between the two adjacent sawtooth noise reduction pieces, and the comb flow structure unit can be correspondingly rotationally adjusted along with the change of the direction of combined airflow of a windward side and a leeward side between the adjacent sawtooth noise reduction pieces so as to further weaken noise emitted by the interaction of the combined airflow of the windward side and the leeward side between the adjacent sawtooth noise reduction pieces and a blade trailing edge section.

2. The wind power blade noise reduction trailing edge structure according to claim 1, wherein: comb flows constitutional unit wholly is the triangle-shaped form, has spheroidal mobile jib by one end and is two sets of comb flows down tube group in this mobile jib both sides by bilateral symmetry and constitute, and every group comb flows down tube group and comprises many different length down tube that are parallel to each other, from the mobile jib tail end toward having spheroidal mobile jib front end direction, and these many down tubes are by short to long sequencing in proper order, and all down tubes keep away from the one end of mobile jib all flush with the mobile jib tail end, the mobile jib tail end flushes with the most advanced of piece of making an uproar falls in adjacent sawtooth.

3. The wind power blade noise reduction trailing edge structure according to claim 2, wherein: the main rod is a conical rod, and the ball body is fixed on the large end face of the conical rod.

Technical Field

The invention relates to the technical field of renewable new energy wind power blades, in particular to a noise reduction trailing edge structure of a wind power blade.

Background

In recent years, wind generator technology has seen an increasing proportion of the electrical energy produced worldwide. With the increasing demand for renewable energy sources, represented by wind generators, wind farms in the future are likely to be closer to densely populated areas than today. When this occurs, noise generated by onshore wind turbines located near populated areas can cause interference and annoyance to local residents. The noise of the land wind power generator may limit the installation position of the wind power generator set and restrict the development and utilization of wind power resources near residential areas. Accordingly, a great deal of research and development work has been devoted to reducing the operational noise of wind turbine generators.

Different methods of reducing the operational noise of wind turbine generators have been proposed in the past. One option for reducing the operational noise of a wind turbine is to meet the noise constraints by reducing the power of the wind turbine. However, reducing the wind generator power operation also sacrifices the wind energy efficiency of the wind generator to some extent. Another option is to attach a sawtooth noise reduction structure adjacent the trailing edge of the aerogenerator blade to reduce the noise when the wind flows in a direction along the trailing edge of the aerogenerator blade. However, if the direction of the wind flow is changed, the efficiency of the serrated noise reduction structure in reducing noise may be reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a wind power blade noise reduction trailing edge structure which can not reduce the noise reduction effect due to the change of the airflow direction.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: a wind power blade noise reduction trailing edge structure comprises a trailing edge patch, sawtooth noise reduction sheets and a combing structure unit, wherein the trailing edge patch is attached to the surface of a trailing edge section corresponding to 35% -98% of the spanwise position of a blade or the surface of the whole trailing edge section of the blade, a plurality of mounting positions for the sawtooth noise reduction sheets to be mounted in a one-to-one correspondence mode are formed in the length direction of the trailing edge patch, a mounting column for the combing structure unit to be mounted is arranged between every two mounting positions, the sawtooth noise reduction sheets are connected with the trailing edge patch in a rotating shaft hinge mode, every two adjacent sawtooth noise reduction sheets are separated through the mounting column, the sawtooth noise reduction sheets can be correspondingly rotationally adjusted along with the change of the speed and the direction of airflow flowing through the trailing edge section of the blade so as to weaken noise generated by the interaction between the airflows in different directions and the trailing edge section of the blade, and then improve blade work efficiency, comb and flow the structural unit and adopt the spherical hinge form to be connected between the erection column, and two pairs of adjacent sawtooth is fallen and is installed a comb and flow the structural unit, just is in the vacancy that tooth point part and the erection column between them of two adjacent sawtooth are fallen and is fallen the piece and enclose, comb and flow structural unit can fall the change of the direction of the amalgamation air current of windward side and leeward side between the piece and the adjacent sawtooth and do corresponding rotation adjustment to further weaken the noise that is sent by the interaction of the amalgamation air current of windward side and leeward side and blade trailing edge section between the piece is fallen to the adjacent sawtooth.

Further, the whole triangle-shaped that is of comb structure unit flows, has spheroidal mobile jib by one end and is two sets of comb flow down tube group constitutions in this mobile jib both sides of bilateral symmetry distribution, and every group comb flow down tube group comprises many different length down tubes that are parallel to each other, from the mobile jib tail end toward having spheroidal mobile jib front end direction, and these many down tubes are by short to long sequencing in proper order, and all down tubes keep away from the one end of mobile jib all flush with the mobile jib tail end, the mobile jib tail end flushes with the most advanced of piece of making an uproar falls in adjacent sawtooth.

Furthermore, the main rod is a conical rod, and the sphere is fixed on the large end surface of the conical rod.

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

1. adopt the pivot hinge form to be connected between piece and the trailing edge paster of making an uproar is fallen to the sawtooth, for fixed trailing edge paster, the piece is fallen to the sawtooth can be along with the speed that flows through the air current in blade trailing edge section and the change of direction do corresponding rotation adjustment, thereby improve the efficiency of wind-powered electricity generation blade, and then promote aerogenerator's generating efficiency, and the piece is fallen to the sawtooth can weaken the noise that the interact of the air current of equidirectional not and blade trailing edge section sent, and then realize the reduction of wind-powered electricity generation blade noise level.

2. The combing structure unit is connected with the mounting columns in a spherical hinge mode, is just positioned at a vacancy surrounded by tooth tip parts of two adjacent sawtooth noise reduction sheets and the mounting column between the two adjacent sawtooth noise reduction sheets, and can be correspondingly rotationally adjusted along with the change of the direction of combined airflow of a windward side and a leeward side between the adjacent sawtooth noise reduction sheets so as to further more efficiently weaken noise generated by the interaction of the combined airflow of the windward side and the leeward side between the adjacent sawtooth noise reduction sheets and a blade trailing edge section. Overall, a more pronounced noise reduction can be achieved with adjustable comb structure elements.

Drawings

FIG. 1 is a schematic view of the overall installation of the noise reduction trailing edge structure of the wind power blade on the wind power blade.

FIG. 2 is a partial schematic view of the wind power blade noise reduction trailing edge structure of the invention on a wind power blade.

FIG. 3 is a partial schematic view of the noise reduction trailing edge structure of the wind turbine blade according to the present invention.

Fig. 4 is a schematic cross-sectional view taken through line a-a of fig. 3.

Fig. 5 is a schematic cross-sectional view taken through line b-b of fig. 3.

FIG. 6 is a schematic view of the hinge structure between the trailing patch and the hinge shaft.

FIG. 7 is a schematic view of a sawtooth noise reduction plate.

Fig. 8 is a schematic structural diagram of a comb flow structural unit.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Referring to fig. 1 to 8, the wind turbine blade noise reduction trailing edge structure provided by this embodiment includes a trailing edge patch 1, a sawtooth noise reduction sheet 2, and a comb flow structure unit 3, where the trailing edge patch 1 is attached to a surface of a trailing edge section corresponding to 35% to 98% of a span direction of a blade 4 or to a surface of all trailing edge sections of the blade 4, and a plurality of mounting positions for mounting the sawtooth noise reduction sheet 2 in a one-to-one correspondence are formed along a length direction of the trailing edge patch 1, and a mounting post 5 for mounting the comb flow structure unit 3 is disposed between every two mounting positions, the sawtooth noise reduction sheet 2 and the trailing edge patch 1 are connected in a form of a rotating shaft hinge 6, and every two adjacent sawtooth noise reduction sheets 2 are separated by the mounting post 5, and with respect to the fixed trailing edge patch 1, the sawtooth noise reduction sheet 2 can be correspondingly adjusted in rotation along with changes in speed and direction of an air flow passing through the trailing edge section of, the comb flow structure unit 3 is connected with the mounting columns 5 in a spherical hinge mode, a comb flow structure unit 3 is mounted between every two adjacent saw tooth noise reduction sheets 2 and is just positioned at a vacancy position surrounded by tooth tip parts of the two adjacent saw tooth noise reduction sheets 2 and the mounting column 5 between the two adjacent saw tooth noise reduction sheets, the comb flow structure unit 3 is integrally triangular, and consists of a main rod 31 with a sphere 33 at one end and two groups of comb flow inclined rod groups which are symmetrically distributed at two sides of the main rod 31 from left to right, the main rod 31 is a conical rod, the sphere 33 is fixed on the large end surface of the conical rod, each group of comb flow inclined rod group consists of a plurality of inclined rods 32 which are different in length but are parallel to each other, and the main rod 31 is oriented from the tail end of the main rod 31 to the front end of the main rod 31 with the sphere 33, the plurality of inclined rods 32 are sequentially sequenced from short to long, one end of each inclined rod 32 far away from the main rod 31 is flush with the tail end of the main rod 31, and the tail end of the main rod 31 is flush with the tip end of the adjacent sawtooth noise reduction sheet 2; the combing structure unit 3 can be correspondingly adjusted in rotation along with the change of the direction of the combined airflow of the windward side and the leeward side between the adjacent sawtooth noise reduction sheets 2, so as to further weaken the noise generated by the interaction of the combined airflow of the windward side and the leeward side between the adjacent sawtooth noise reduction sheets 2 and the trailing edge section of the blade.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that any changes made in the shape and principle of the present invention should be covered within the protection scope of the present invention.