CN207609506U - Blade for wind power generating set and wind power generating set with the blade - Google Patents

Abstract

The utility model discloses a blade for a wind power generating set and a wind generating set with the blade. The blade includes: a blade body having a leading edge, a trailing edge, and a pressure side and a suction side extending between the leading edge and the trailing edge; and a noise reducer including a fixing portion disposed in the blade body and a The noise reducing part is exposed on the outside of the blade body, wherein the fixing part forms an integral structure with the blade body through integral injection molding with the blade body. The blade according to the present invention improves the installation reliability between the noise reducer and the blade body by fixing the noise reducer during the process of forming the blade body (for example, pouring).

Description

Blade for wind power generating set and wind power generating set with the blade

technical field

The utility model belongs to the technical field of wind power generators, in particular to a blade for a wind power generator and a wind power generator with the blade.

Background technique

With the rapid development of wind power, the installed capacity is getting bigger and bigger. The distribution of installed capacity has changed from being mainly distributed in relatively remote areas in the past to the southeast coastal and southern regions. Due to the relatively developed economy in the south, with the increase in installed capacity, new The fan is relatively close to the residential area or breeding area, and the fan will generate a lot of noise during operation, so there are relatively high requirements for the noise.

The production process of the blade is mainly completed in the blade mold, and the shape has basically been determined. Moreover, the blade is slender shape, and the production depends on the precision of the mold, and the noise is directly related to the thickness of the blade trailing edge; when there is a wind field or When the project is close to residential areas or breeding areas, there are specific requirements for noise. Since the shape of the blade or the mold cannot be changed, the installation of noise-reducing sawtooth and noise-reducing brushes can only be done through post-installation, which is relatively reliable. Low, can not fully meet the requirements of matching, affecting the life and income of the surrounding residents; and through the installation of noise reduction sawtooth and noise reduction brush through glue joints, the natural conditions of the wind farm where the wind power operates are relatively harsh, and as time goes by Due to the relatively poor reliability of bonding, the accessories for noise reduction are easy to fall off.

Utility model content

Aiming at the above-mentioned deficiencies in the prior art, the utility model provides a blade with high installation reliability of a noise reduction device and a wind power generating set with the blade.

According to an aspect of the present invention, there is provided a blade comprising: a blade body having a leading edge, a trailing edge, and a pressure side and a suction side extending between the leading edge and the trailing edge; The fixing part in the middle and the noise reduction part arranged on the fixing part and exposed outside the blade body, wherein the fixing part forms an integral structure with the blade body through integral injection molding with the blade body.

The fixing part of the noise reducer may be integrated with the skin used to form the blade body by vacuum infusion.

The fixing part can be poured integrally with the skin forming the pressure side.

The fixing portion may be provided between the multilayer skins forming the pressure side or on the uppermost side of the multilayer skins.

The noise reducer may be provided at the trailing edge of the blade body.

The noise reduction part may be located within approximately 1/3 of the length from the tip of the blade to the root of the blade.

The noise reduction part can be a brush structure, and the length of the exposed bristles can be 3%-20% of the chord length of the blade where the noise reduction part is located.

Bristles can be provided on both opposite sides of the fixing part, wherein the bristles on one side can be arranged in the blade body, and the bristles on the other side are exposed outside the blade body.

The noise reduction part may have a sawtooth structure.

According to another aspect of the present utility model, a wind power generating set is provided, and the wind power generating set includes the above-mentioned blade.

The blade according to the present invention and the wind power generating set including it have at least one of the following beneficial technical effects:

1. According to the blade of the present invention and the wind power generating set including the same, the noise reducer is fixed during the process of forming the blade body (for example, pouring), thereby improving the installation reliability between the noise reducer and the blade body.

2. The blade according to the present invention and the wind power generating set including it do not need to install the noise reducer after the blade body is produced, thereby improving the production efficiency.

3. The blade according to the present invention and the wind power generating set including it can reduce the noise because the noise reducer is installed at the trailing edge.

Description of drawings

The above and/or other purposes and advantages of the present utility model will become clearer through the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Figure 1 shows a plan view of a blade according to an embodiment of the present invention;

Fig. 2 shows a schematic cross-sectional view of a blade according to an embodiment of the present invention;

Fig. 3 shows a partially enlarged schematic diagram at part "A" in Fig. 2;

Fig. 4 shows a schematic diagram of the relationship between the noise reducer in the blade and the blade body according to an embodiment of the present invention;

Fig. 5 shows another schematic diagram of the relationship between the noise reducer in the blade and the blade body according to an embodiment of the present invention;

Figure 6 shows an enlarged schematic view of a noise reducer in a blade according to an embodiment of the present invention; and

Fig. 7 shows an enlarged schematic view of a modified noise reducer in a blade according to an embodiment of the present invention.

The reference signs are explained as follows:

100-blade 110-blade body 111-leading edge 112-trailing edge 113-pressure side 114-suction side 120-noise reducer 121-fixing part 122-noise reducing part 130-adhesive.

Detailed ways

The embodiments are described below in order to explain the present invention by referring to the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

As shown in FIGS. 1 to 7 , the blade 100 according to the present invention includes a blade body 110 and a noise reducer 120 integrally poured with the blade body 110 .

The blade body 110 may be any suitable airfoil blade body commonly used in the art, for example, a blade body with an asymmetrical airfoil (or called “curved airfoil”) or a symmetrical airfoil. However, the present invention is not limited thereto, as long as the blade body can be applied to a wind power generating set. In the accompanying drawings of the present utility model, the schematic structure of the blade is shown by taking the blade of an asymmetrical airfoil as an example.

Blade body 110 may include a leading edge 111 and a trailing edge 112 , and a pressure side 113 and a suction side 114 extending between leading edge 111 and trailing edge 112 . The blade body 110 may be formed by bonding a first half shell and a second half shell formed along the length direction. For example, the first half-shell may correspond to the pressure side 113 and the second half-shell may correspond to the suction side 114 .

The pressure side 113 and the suction side 114 may be manufactured by vacuum infusion using a mold, and then the blade body 110 may be manufactured by bonding the pressure side 113 and the suction side 114 to each other by an adhesive 130 (as shown in FIG. 3 ).

In an embodiment of the present invention, the noise reducer 120 can be arranged at the trailing edge 112 of the blade body 110, and near the tip of the blade, for example, within about 1/3 of the length from the tip to the root of the blade. .

The noise reducer 120 can be a sawtooth type noise reducer or a brush type noise reducer. According to different wind fields, you can choose sawtooth or brushes with different shapes, densities, and lengths to meet different needs. The noise reducer 120 can be integrally formed with the blade body 110 during the manufacturing process of the blade body 110 . For example, the shape of the noise reducer 120 can be designed in advance, placed at the trailing edge of the blade during the production process of the blade like laying layers, and poured together with the blade body 110 . For example, the noise reducer 120 may be laid between the skins of the blade or on the uppermost or lowermost layer of the skins, and then formed into an integral structure with the skins by vacuum infusion of the skins. Since the noise reducer is integrally formed with the blade, the installation reliability of the noise reducer can be improved. For the formed blades with noise reducers, there is no need to install noise reduction devices in the later stage, which simplifies the process.

As shown in FIG. 3 to FIG. 5 , the noise reducer 120 may include: a fixing part 121, at least partly arranged in the blade body 110 and integrally poured with the blade body 110; a noise reducing part 122, arranged on the fixing part 121 and exposed outside the blade body 110 .

Referring to FIG. 6 and FIG. 7 , the fixing part 121 may be flat and have a suitable length, width and thickness to be stably embedded in the blade body 110 .

In an embodiment of the present invention, as shown in FIG. 4 , the fixing portion 121 may be disposed in the pressure side 113 of the blade body 110 . That is, the fixing part 121 may be provided in the pressure side 113 by integral injection molding with the pressure side 113 . Specifically, when manufacturing the pressure side 113 of the blade body 110, the fixed part 121 can be laid in the multi-layer skin of the pressure side 113; It is arranged integrally in the pressure side 113 . Preferably, the noise reducer 120 is arranged at the trailing edge 112 of the blade body 110 .

In another embodiment of the present invention, as shown in FIG. 5 , the fixing portion 121 may be disposed on the surface of the pressure side 113 of the blade body 110 that is combined with the suction side 114 . That is, the fixing portion 121 may be integrally poured with the pressure side 113 and provided on the surface of the pressure side 113 . Specifically, when manufacturing the pressure side 113 of the blade body 110, the fixing part 121 can be laid on the uppermost side of the multi-layer skin for manufacturing the pressure side 113, and then the multi-layer skin is poured with resin and solidified to form the fixed part 121. Portion 121 is provided integrally on pressure side 113 .

In an exemplary embodiment of the present utility model, the noise reducing part may be a brush structure. According to the design requirements, the hard brush can be arranged on one side of the fixed part 121 (as shown in Figure 6), and can also be arranged on the opposite sides of the fixed part 121 (as shown in Figure 7) so as to further increase the fixed part. 121 and the blade body 110 are installed reliably, and form an integral structure with the fixing part 121 . The specific shape of the fixing part 121 can be designed according to the thickness of the skin layer on the pressure side, so that the thickness of the trailing edge does not increase after the installation is completed, and the transition with the blade surface is smooth.

In a non-limiting embodiment of the present utility model, the fixing part 121 can be made of relatively soft engineering plastics or other soft materials, and solidified with one end of the hard bristles to form a seal and fix it during vacuum infusion. effect. The other end of the hard bristles is arranged outside the vacuum infusion chamber and is not affected by the infusion resin.

In an embodiment of the present invention, the noise reduction portion 122 may be located at the blade tip of the blade body 110 along the length direction of the blade body 110 , for example, within about 1/3 of the length from the blade tip to the blade root. The exposed length of the noise reducing portion 122 may be 3%-20% of the local chord length of the blade where the noise reducing portion 122 is located. For example, for a 60m long blade, the noise reducer can be installed in the area 40m-60m away from the blade root, the chord length at the 40m position is 1.8m, and the length of the outer bristles can be 50mm-360mm. However, the present invention is not limited thereto, and the specific position, layout range and exposed size of the noise reducing part on the blade body 110 can be determined according to the wind field conditions and design requirements of the region where the blade is used.

The method of manufacturing the blade 100 of the present invention will be described in detail below.

First, when manufacturing the pressure side 113, a multi-layer skin can be laid in the mold, and a part of the fixed part 121 of the noise reducer 120 can be placed on the uppermost layer of the multi-layer skin in the mold or placed between the multi-layer skin During this period, the skin in the mold is sealed, resin is poured, and the resin is cured to obtain the pressure side 113 with the noise reducer 120; then, the pressure side 113 is bonded to the suction side 114 through the adhesive 130 to obtain the The blade 100 of the present utility model.

In addition, after the pressure side 113 and the suction side 114 are manufactured separately, when the two casings are molded together, the noise reducer is placed on the trailing edge of the blade, and is integrated with the blade body as the adhesive is cured and formed.

The blade 100 according to the present invention improves the installation reliability between the noise reducer and the blade body by fixing the noise reducer during the process of forming the blade body (eg, pouring).

The blade 100 according to the utility model does not need to install the noise reducer after the blade is produced, thereby improving the production efficiency.

The blade 100 according to the utility model can reduce the noise because the noise reducer is installed on the trailing edge.

Although some embodiments of the present invention have been described above, those skilled in the art should understand that changes can be made in these embodiments without departing from the principle and spirit of the present invention. The scope is defined by the claims and their equivalents.

Claims (10)

1. A blade for a wind power generator, characterized in that the blade comprises: A blade body (110) having a leading edge (111), a trailing edge (112) and a pressure side (113) and a suction side (114) extending between said leading edge (111) and said trailing edge (112) ;as well as A noise reducer (120), comprising a fixing part (121) arranged in the blade body (110) and a noise reducer arranged on the fixing part (121) and exposed to the outside of the blade body (110) Department (122), Wherein, the fixing part (121) forms an integral structure with the blade body (110) through integral injection molding with the blade body (110). 2. The blade according to claim 1, characterized in that, the fixing part (121) and the skin used to form the blade body (110) are solidified into one body through vacuum infusion. 3. The blade according to claim 1, characterized in that, the fixing part (121) is integrally poured into a skin for forming the pressure side (113). 4. The blade according to claim 3, characterized in that the fixing portion (121) is arranged between the multi-layer skins forming the pressure side (113) or on the uppermost side of the multi-layer skins. 5. The blade according to any one of claims 1-4, characterized in that the noise reducer (120) is arranged at the trailing edge (112) of the blade body (110). 6. The blade according to claim 5, characterized in that, the noise reducing portion (122) is located within approximately 1/3 of the length from the tip of the blade to the root of the blade. 7. The blade according to claim 5, characterized in that, the noise reduction part (122) is a brush structure, and the length of the exposed bristles is 3 times the chord length of the blade where the noise reduction part (122) is located. %-20%. 8. The blade according to claim 7, characterized in that bristles are provided on opposite sides of the fixing portion (121), wherein the bristles on one side are arranged in the blade body (110), and the bristles on the other side are arranged in the blade body (110). The bristles on one side are exposed outside the blade body (110). 9. The blade according to any one of claims 1-4, characterized in that, the noise reducing part (122) is a sawtooth structure. 10. A wind power generator, characterized in that the wind power generator comprises the blade according to any one of claims 1-9.