阅读说明：本技术 叶片及风力发电机的叶轮 (Blade and impeller of wind driven generator ) 是由 郭光星 张磊 闻笔荣 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种叶片及风力发电机的叶轮,该叶片包括壳体,还包括隔板,所述隔板位于所述壳体的内腔,且与所述壳体的横截面的形状匹配,所述隔板的周壁与所述壳体的内周壁固接。该叶片的结构设计能够在保证叶片稳定性的同时降低叶片的重量,有利于叶片的大型化发展趋势。(The invention discloses a blade and an impeller of a wind driven generator, wherein the blade comprises a shell and a partition plate, the partition plate is positioned in an inner cavity of the shell and is matched with the shape of the cross section of the shell, and the peripheral wall of the partition plate is fixedly connected with the inner peripheral wall of the shell. The structural design of this blade can reduce the weight of blade when guaranteeing blade stability, is favorable to the maximization development trend of blade.)

1. The blade comprises a shell (11) and is characterized by further comprising a partition plate (13), wherein the partition plate (13) is located in an inner cavity of the shell (11) and matched with the cross section of the shell (11) in shape, and the peripheral wall of the partition plate (13) is fixedly connected with the inner peripheral wall of the shell (11).

2. Blade according to claim 1, wherein a sheath ring (14) is fixedly arranged between the shell (11) and the partition (13), and the sheath ring (14) is an annular structure attached to the inner circumferential wall of the shell (11).

3. Blade according to claim 2, wherein the axial dimension of the sheath ring (14) is greater than the thickness of the barrier (13), the barrier (13) being located in the middle of the sheath ring (14) in the axial direction of the sheath ring (14).

4. Blade according to claim 2, characterized in that said sheath ring (14) is of one-piece construction with said shell (11).

5. Blade according to claim 4, characterized in that the shell (11) and the sheath ring (14) are integrally formed by a composite material infusion process, the material of the sheath ring (14) comprising at least one of glass fiber cloth, carbon fiber cloth, balsa wood and foam.

6. Blade according to claim 2, characterized in that the partition (13) and the sheath ring (14) are fixed by a structural glue (16).

7. Blade according to claim 6, characterized in that the thickness of the structural glue (16) is 3-8 mm.

8. Blade according to any of claims 1 to 7, characterized in that the shell (11) is further provided with a sheath ring (15) at the position of the partition (13), and the sheath ring (15) is an annular structure attached to the outer peripheral wall of the shell (11).

9. Blade according to claim 8, characterized in that said sheath ring (15) comprises a plurality of layers of fibrous cloth laid on the peripheral wall of said shell (11).

10. Blade according to claim 9, characterized in that the surface of said sheath ring is further coated with a paint and/or a surface protective coating.

11. A blade according to any of claims 1-7, characterized in that the partition (13) is of sandwich plate construction.

12. Blade according to any of claims 1 to 7, wherein a plurality of said partitions (13) are arranged at intervals in said shell (11) along the length of said shell (11).

13. Blade according to claim 12, characterized in that the first one of said partitions (13) is located at the maximum chord length of the blade (10) in the root to tip direction of the blade (10).

14. The blade of claim 12, wherein the blade (10) further comprises a web (12), the web (12) is fixedly arranged in the inner cavity of the shell (11) and extends along the length direction of the shell (11); the number of webs (12) does not exceed 2.

15. Impeller for a wind power plant, comprising a number of blades (10), characterized in that the blades (10) are blades according to any of claims 1-14.

Technical Field

The invention relates to the technical field of wind power generation, in particular to a blade and an impeller of a wind power generator.

Background

With the maturity and progress of wind power generation technology, large-capacity wind power generation sets on land and on sea are developed rapidly at present, the length of each blade exceeds one hundred meters, and the weight of each blade can reach 30 tons.

In order to reduce the weight and load of the blade, more and more blades are in the form of a carbon fiber shell and three webs, as shown in fig. 1, the blade 1 'comprises a shell 11' and three webs 12 'located in the shell 11', and the length of the webs 12 'extends substantially along the length of the blade 1'.

However, as the blade grows, the length and weight of the web increase, and under the trend of large-scale development of the blade, the number of the webs needs to increase along with the blade to ensure the performance of the blade, which inevitably leads to the weight of the web of one blade being greatly increased, and thus the weight of the blade being greatly increased.

Disclosure of Invention

The invention aims to provide a blade and an impeller of a wind driven generator, wherein the structural design of the blade can ensure the stability of the blade and reduce the weight of the blade at the same time, and is favorable for the large-scale development trend of the blade.

In order to solve the technical problem, the invention provides a blade, which comprises a shell and a partition plate, wherein the partition plate is positioned in an inner cavity of the shell and is matched with the shape of the cross section of the shell, and the peripheral wall of the partition plate is fixedly connected with the inner peripheral wall of the shell.

The partition plate is fixedly arranged in the inner cavity of the shell of the blade, the partition plate is matched with the cross section of the inner cavity of the shell in shape, the peripheral wall of the partition plate is fixedly connected with the inner peripheral wall of the shell, and the stability of the shell is enhanced through the arrangement of the partition plate.

In the blade, an inner sheath ring is fixedly arranged between the shell and the partition board, and the inner sheath ring has an annular structure attached to the inner circumferential wall of the shell.

In the blade, the axial dimension of the sheath ring is greater than the thickness of the partition, and the partition is located in the middle of the sheath ring along the axial direction of the sheath ring.

As for the blade, the sheath ring and the shell are of an integrally formed structure.

According to the blade, the shell and the inner sheath ring are integrally formed through a composite material pouring process, and the material of the inner sheath ring comprises at least one of glass fiber cloth, carbon fiber cloth, balsa wood and foam.

According to the blade, the partition board and the inner sheath ring are fixed through structural adhesive.

According to the blade, the thickness of the structural adhesive is 3-8 mm.

According to the blade, the shell is further provided with the sheath ring at the position of the partition, and the sheath ring is of an annular structure attached to the outer peripheral wall of the shell.

As described above, the sheath ring includes a plurality of layers of fiber cloth laid on the outer peripheral wall of the shell.

In the blade as described above, the surface of the sheath ring is further coated with paint and/or surface protective coating.

As mentioned above, the partition board is a sandwich board structure.

According to the blade, along the length direction of the shell, a plurality of partition plates which are arranged at intervals are arranged in the shell.

In the blade as described above, the first partition is located at the maximum chord length of the blade in the direction from the root to the tip of the blade.

The blade as described above, further comprising a web, wherein the web is fixedly arranged in the inner cavity of the shell and extends along the length direction of the shell; the number of webs does not exceed 2.

The invention also provides an impeller of a wind driven generator, which comprises a plurality of blades, wherein the blades are any one of the blades.

Since the blade has the technical effects, the impeller of the wind turbine including the blade has the same technical effects, and the discussion is not repeated here.

Drawings

FIG. 1 is a schematic structural diagram of a conventional blade;

FIG. 2 is a front view of one embodiment of a blade provided by the present invention;

FIGS. 3a-3d are schematic views of the construction of four partitions, respectively, of the blade of FIG. 2;

FIG. 4 is an isometric view of portion A of FIG. 2;

fig. 5 is a schematic cross-sectional view of a portion a in fig. 2.

In fig. 1:

blade 1 ', shell 11 ', web 12 ';

in fig. 2 to 4:

the blade comprises a blade 10, a shell 11, a web 12, a partition 13, an inner sheath ring 14, an outer sheath ring 15 and a structural adhesive 16.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2 to fig. 3d, fig. 2 is a schematic structural diagram of an embodiment of a blade according to the present invention; fig. 3a-3d are schematic views of the structure of four partitions of the blade shown in fig. 2.

The blade 10 provided by the invention is used for a wind driven generator and comprises a shell 11, wherein the shell 11 is provided with an inner cavity, the blade 10 further comprises a plurality of partition plates 13, the partition plates 13 are arranged at intervals along the length direction of the shell 11, the shapes of the partition plates 13 are matched with the cross section shape of the inner cavity of the shell 11, the partition plates 13 are positioned in the inner cavity of the shell 11, the peripheral walls of the partition plates 13 are fixedly connected with the inner peripheral wall of the shell 11, and it can be understood that the plate surfaces of the partition plates 13 are vertical to the axial direction of the shell 11.

In the blade shown in fig. 2, the structure that the inner cavity of the shell 11 of the blade 10 is provided with four partition plates 13 is exemplarily shown, and in combination with fig. 3a to 3d, it can be understood that, because the cross-sectional shapes of different positions of the shell 11 in the length direction are different, the specific shapes of the four partition plates 13 are also different from each other and respectively consistent with the cross-sectional shapes of the inner cavity of the shell 11 at the corresponding positions.

In actual installation, the specific number of the partition plates 13 and the spacing distance between adjacent partition plates 13 are set according to requirements, and are not limited herein.

Specifically, the first partition 13 is located at the maximum chord length of the blade 10 in the blade root to blade tip direction of the blade 10, so that the loading performance of the blade 10 can be relatively well ensured.

This blade 10 is provided with baffle 13 in casing 11, improves the stability of casing 11 through baffle 13 to can reduce the quantity of web 12, can not even set up web 12, baffle 13 is compared weight little with web 12, can guarantee the weight that reduces blade 10 when blade 10 stability like this, is favorable to the large-scale development trend of blade 10.

In the example shown in fig. 2, one web 12 and four partitions 13 are provided in the shell 11 of the blade 10, and in actual installation, the number of the partitions 13 and the number of the webs 12 may be determined as required, and generally, the number of the webs 12 does not exceed 2, so as to ensure the requirement of lightweight development of the blade 10. For specific applications, the specific position and the extending length of the web 12 in the housing 11 can be set according to actual needs, and generally, the length direction of the web 12 extends substantially along the length direction of the housing 11.

It should be noted here that the web 12 extends substantially along the longitudinal direction of the housing 11, and does not mean that the longitudinal direction of the web 12 is strictly parallel to the longitudinal direction of the housing 11, and depending on the external contour of the housing 11, the longitudinal direction of the web 12 may be appropriately deviated to follow the external contour of the housing 11 depending on the position of the web 12.

Referring to fig. 4 and 5 together, fig. 4 is an isometric view of a portion a in fig. 2, and fig. 5 is a schematic sectional view of the portion a in fig. 2.

In this embodiment, the blade 10 further includes a sheath ring 14, the sheath ring 14 is fixedly disposed between the shell 11 and the partition 13, the sheath ring 14 is an annular structure attached to the inner circumferential wall of the shell 11, the annular structure may be closed or not completely closed, and it can be understood that the axial direction of the sheath ring 14 is the same as the axial direction of the shell 11; the partition 13 is directly fixed with the sheath ring 14.

The arrangement of the inner sheath ring 14 can improve the strength of the connecting position of the partition 13 and the shell 11, and is beneficial to improving the overall stability of the blade 10.

Specifically, the axial dimension of the sheath ring 14 is greater than the thickness of the partition 13, and the partition 13 is located in the middle of the sheath ring 14 along the axial direction of the sheath ring 14, so that the stability and uniformity of stress at the connection position of the partition 13 and the shell 11 can be ensured, and the stability of the blade 10 can be improved.

In this embodiment, the sheath ring 14 and the shell 11 are an integrally formed structure, so as to avoid an additional connecting structure between the two, which is beneficial to improving the stability of the blade 10.

In order to meet the development requirement of light weight, the shell 11 of the blade 10 is made of a composite material, specifically, the shell 11 and the inner sheath ring 14 are integrally formed through a composite material pouring process, during actual manufacturing, the laying design of the shell 11 can be kept the same as or similar to that of the prior art, after laying of the shell 11 is completed, a material for forming the inner sheath ring 14 is correspondingly laid at the connecting position of the partition 13, and then the inner sheath ring 14 and the shell 11 can be combined together through a resin integral pouring process.

It can be understood that the arrangement of the sheath ring 14 can reinforce the strength of the position where the partition 13 is located, so that the axial dimension of the sheath ring 14 is relatively far smaller than the length of the shell 11, as long as the sheath ring can play a role in reinforcing the partition 13. Likewise, the thickness of the sheath ring 14 may be set according to actual needs, and is not limited herein.

The material of the sheath ring 14 may specifically be glass fiber cloth or carbon fiber cloth, and the glass fiber cloth or the carbon fiber cloth may specifically be in the form of uniaxial cloth, or may be in other forms, depending on specific requirements; the material of the sheath ring 14 may also be balsa wood or foam, or may also be other composite materials. Blends may also be used, such as fiberglass cloth and balsa wood.

The partition board 13 and the inner sheath ring 14 are fixed through the structural adhesive 16, during specific manufacturing, the partition board 13 which is consistent with the cross section shape of the inner cavity of the shell 11 at the mounting position can be manufactured in advance according to the predetermined mounting position, the structural adhesive 16 is coated on the surface of the inner sheath ring 14 before the die assembly process of the blade 10, then the partition board 13 is placed, the setting time is stabilized through a fixing tool, the thickness of the structural adhesive 16 can be within 3-8 mm according to the fixing requirement, the setting time stabilized through the fixing tool is at least half an hour, and of course, according to the actual application requirement, the related parameters can be properly adjusted.

In this embodiment, the partition board 13 may be of a sandwich panel structure, and includes a core material in the middle and skins on both sides, and the skins may be made of composite fiber materials such as bidirectional fiber cloth. Thus, the weight of the partition plate 13 can be reduced.

In this embodiment, the shell 11 of the blade 10 is further provided with the sheath ring 15 at the position of the partition 13, the sheath ring 15 has an annular structure adhered to the outer peripheral wall of the shell 11, and the sheath ring 15 is also provided to improve the strength of the shell 11 at the position of the partition 12.

It can be understood that the positions of the sheath rings 15 and 14 correspond to each other, and the axial sizes of the sheath rings 15 may be the same as or different from those of the sheath rings 14 at the corresponding positions.

In a specific arrangement, the sheath ring 15 may be formed by hand pasting for reinforcement after the shell 11 is integrally formed.

The sheath ring 15 specifically comprises a plurality of layers of fiber cloth, for example, 2-5 layers, or is arranged according to actual requirements, and the fiber cloth forming the sheath ring 15 specifically can be glass fiber cloth or carbon fiber cloth, and can be single-axis cloth.

After the sheath ring 15 is laid, the surface of the sheath ring 15 and the connection transition position between the sheath ring 15 and the outer wall of the shell 11 can be polished, and then paint and/or surface protective coating can be coated.

The arrangement of the sheath ring 15 may affect the overall appearance of the blade 10, and may possibly affect the power generation efficiency of the blade 10, during actual arrangement, the sheath ring 15 may not be arranged according to application requirements, and at this time, in order to ensure the structural performance of the blade 10 at the position of the partition 13, the thickness of the sheath ring 14 may be appropriately increased.

In addition to the aforementioned blades 10, the present invention also provides an impeller of a wind turbine, which includes a plurality of blades 10 described in the above embodiments, and which can reduce the weight and load while ensuring the performance, and is advantageous for the development of light weight.

The blade and the impeller of the wind driven generator provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.