CN218717233U - Modular wind power blade fixing structure - Google Patents

Abstract

The utility model relates to the technical field of modularized wind power blades, in particular to a fixed structure for modularized wind power blades, which includes a windward side shell and a leeward side shell, and a shell arranged between the windward side shell and the leeward side shell. Reinforcement components, wherein: the reinforcement components include transverse reinforcement ribs, longitudinal reinforcement ribs and I-shaped beams, the windward side shell and the leeward side shell are relatively assembled, and the cross-section after combination forms a complete blade section structure; the transverse reinforcement ribs are along the width of the blade The direction is attached to the inner wall of the windward side shell and the leeward side shell, the longitudinal rib is attached to the inner wall of the windward side and the leeward side shell in the direction perpendicular to the transverse rib, and the I-beam is attached to the inner wall of the wind turbine blade along the length direction of the wind turbine blade. A plurality of beams are arranged in parallel, and the top and bottom of the I-beams are respectively connected with the inner walls of the shell on the windward side and the shell on the leeward side. The utility model is arranged in the above manner, so that the overall shear resistance of the blade can be improved, and the overall structural strength can be strengthened.

Description

A modular wind turbine blade fixing structure

technical field

The utility model relates to the technical field of modularized wind power blades, in particular to a fixing structure for modularized wind power blades.

Background technique

With the development of large-scale wind power blades, the traditional blade manufacturing method is becoming more and more difficult. In order to improve the convenience of manufacturing and installation, the development of wind power blades is gradually moving towards the direction of modularization. However, the modular connection , put forward higher requirements for the connection of each module and the connection between modules;

In related technologies, for the connection of each module, a box-shaped block-type connection structure is often used, such as a modular wind power blade disclosed on August 31, 2021 in a Chinese invention patent with the publication number CN113323797A. The front edge piece, the rear edge piece and the middle piece are arranged in the width direction of the machine, and the three are fastened and connected by bolts;

However, when implementing the above solution, the inventors found that the above connection method reduces the shear force of the overall blade on the windward side and the leeward side, making the service life of wind turbine blades more dependent on the connecting bolts, which is not conducive to bearing the windward side. and loads on the leeward side.

Utility model content

In view of at least one of the above technical problems, the utility model provides a modular wind power blade fixing structure, which adopts an improved connection structure to improve the shear resistance of the wind power blade.

According to the first aspect of the present utility model, there is provided a modular wind turbine blade fixing structure, which includes a windward side shell and a leeward side shell oppositely arranged, and a reinforcement arranged between the windward side shell and the leeward side shell components, where:

The reinforcement assembly includes transverse reinforcement ribs, longitudinal reinforcement ribs and I-beams, the windward side shell and the leeward side shell are joined together, and the combined cross section forms a complete blade section structure; The width direction is attached to the inner wall of the windward side shell and the leeward side shell, and the longitudinal rib is attached to the inner wall of the windward side and the leeward side shell in a direction perpendicular to the transverse rib, A plurality of I-beams are arranged in parallel along the length direction of the wind power blade, and the top and bottom of the I-beams are respectively connected to the inner walls of the windward shell and the leeward shell.

In some embodiments of the present utility model, the front edge parts of the shell on the windward side and the shell on the leeward side in the width direction both have connecting parts that are folded inward, and the two connecting parts are in the shape of plates arranged in parallel. structure, the front edge parts of the shell on the windward side and the shell on the leeward side are connected through the connecting portion.

In some embodiments of the present invention, there is a structural adhesive layer between the two connecting parts.

In some embodiments of the present utility model, the shell on the windward side and the shell on the leeward side further have a trailing edge beam at the position of the trailing edge in the width direction, the trailing edge beam extends along the length direction of the wind turbine blade, and the bottom surface The top surface is fitted and connected with the inner wall of the shell on the leeward side, and the top surface is fitted and connected with the inner wall of the shell on the windward side.

In some embodiments of the present utility model, the trailing edge beam includes a U-shaped beam and a closing plate closing the opening side of the U-shaped beam.

In some embodiments of the present utility model, the longitudinal reinforcement is a T-shaped beam, including a bottom plate and a vertical plate connected to the bottom plate, and the bottom plate is attached to the inner wall of the windward side shell or the leeward side shell.

In some embodiments of the present utility model, a plurality of longitudinal reinforcing ribs are arranged in parallel and at intervals along the width direction of the wind turbine blade, and the vertical plates are arranged in parallel.

In some embodiments of the present utility model, the I-beam includes a middle web and wing plates arranged at the top and bottom of the web, and the two wing plates are respectively connected to the inner wall of the windward shell and the leeward shell. Inner wall fit.

In some embodiments of the present utility model, a plurality of I-beams are arranged in parallel at intervals along the width direction of the blade, and the webs of the plurality of I-beams are arranged in parallel.

In some embodiments of the present utility model, there is a reinforcing block between the web and the wing of the I-beam, and the reinforcing block is arranged in abutment with the transverse reinforcing rib.

The beneficial effects of the utility model are as follows: the utility model provides an aerodynamic shape through the complete setting of the windward side shell and the leeward side shell, and at the same time makes the entire surface under force, which meets the stability requirements of the wind power blades. At the same time, through The setting of the I-beam in the reinforcement component realizes the transmission of the load on the windward side and the leeward side, and the strength of the shell can be improved through the setting of the transverse and longitudinal ribs. Compared with the connection method of the bolt and the box-shaped body, the overall shear resistance of the blade can be improved, and the overall structural strength can be strengthened.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments recorded in the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is a structural schematic diagram of a fixed structure of a modular wind power blade in an embodiment of the present invention;

Fig. 2 is a schematic diagram of the exploded decomposition structure of the fixed structure of the modular wind power blade in the embodiment of the present invention;

Fig. 3 is a partial enlarged view of A place in Fig. 1 in the utility model embodiment;

Fig. 4 is a structural schematic diagram of the fixed structure of the modular wind power blade in the embodiment of the utility model (the shell on the windward side is omitted);

Fig. 5 is a schematic structural view of the trailing edge beam in the embodiment of the present invention;

Fig. 6 is a structural schematic diagram of longitudinal ribs in an embodiment of the present invention;

Fig. 7 is a schematic diagram of the connection structure between the I-beam and the shell on the leeward side in the embodiment of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terms used in the description of the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The modularized wind turbine blade fixing structure shown in Figures 1 to 7 includes a windward shell 1 and a leeward shell 2 oppositely arranged, and a reinforcement assembly arranged between the windward shell 1 and the leeward shell 2 3, of which:

As shown in Figure 2, the reinforcement assembly 3 includes transverse ribs 31, longitudinal ribs 32 and I-beams 33, the shell 1 on the windward side and the shell 2 on the leeward side are assembled relatively, and the section after joining together forms a complete cross-sectional structure of the blade. ; In the embodiment of the utility model, both the windward side shell 1 and the leeward side shell 2 are complete modular half-shell structures. Through this integral structural design, not only the bearing capacity of the wind turbine blades can be improved, but also the wind power blades can be further strengthened. Shear resistance of wind turbine blades;

Please continue to refer to Fig. 2 , in the embodiment of the present utility model, the transverse reinforcing rib 31 is fitted on the inner walls of the windward side shell 1 and the leeward side shell 2 along the width direction of the blade, and the longitudinal reinforcing rib 32 is along with the transverse reinforcing rib 31 The vertical direction fits on the inner walls of the windward side and the leeward side shell 2. There are multiple I-beams 33 arranged in parallel along the length direction of the wind power blade, and the top and bottom of the I-beams 33 are respectively connected to the windward side shell 1. , The inner wall of the shell 2 on the leeward side is connected. Through the setting of the above-mentioned transverse reinforcing ribs 31 and longitudinal reinforcing ribs 32, the overall structural strength of the windward side shell 1 and the leeward side shell 2 is strengthened, and through the setting of a plurality of I-beams 33, the windward side shell is improved. 1 and the force transmission and bearing capacity between the leeward shell 2.

In the above-mentioned embodiments, through the complete setting of the windward side shell 1 and the leeward side shell 2, the aerodynamic shape is provided while the entire surface is stressed as a whole, which meets the stability requirements of the wind turbine blades. At the same time, through the reinforcement component 3 The setting of the middle I-beam 33 realizes the transmission of the load on the windward side and the leeward side, and the strength of the shell can be improved through the setting of the transverse and longitudinal ribs 32. Compared with the connection method of the bolt and the box-shaped body, the overall shear resistance of the blade can be improved, and the overall structural strength can be strengthened.

On the basis of the above-mentioned embodiment, as shown in Figure 3, in order to further improve the reliability of the connection between the windward side shell 1 and the leeward side shell 2, the windward side shell 1 and the leeward side shell 2 in the width direction The upper front edge portion has a connecting portion 11 turned inward, and the two connecting portions 11 are plate-like structures arranged in parallel. Through the arrangement of the connecting portion 11 turned inward, the contact area between the windward side shell 1 and the leeward side shell 2 is improved. It should be pointed out here that the windward side shell 1 and the leeward side shell 2 pass through There are many ways to connect the connecting portion 11 , and it may be connected by a fastener or by structural glue. Those skilled in the art can make selections as needed. In some embodiments of the present invention, please continue to refer to FIG. 3 , there is a structural adhesive layer 21 between the two connecting parts 11 . That is to say, in this embodiment, the connection between the two connecting parts 11 is realized by means of structural adhesive, through the connection of structural adhesive, the two connecting parts 11 can be fully utilized to increase the bonding area, thereby improving the reliability of bonding .

On the basis of the above-mentioned embodiments, in order to improve the connection reliability between the windward shell 1 and the leeward shell 2 at the rear edge, as shown in Figure 4, the windward shell 1 and the leeward shell 2 are There is also a trailing edge beam 4 at the position of the trailing edge in the windward direction. The trailing edge beam 4 extends along the length direction of the wind turbine blade, and the bottom surface is attached to the inner wall of the leeward shell 2, and the top surface is attached to the inner wall of the windward shell 1. combined connection. In this way, the setting of the trailing edge beam 4 provides stiffness in the shimmy direction and bears the main load in the shimmy direction.

Specifically as shown in FIG. 5 , in some embodiments of the present invention, the trailing edge beam 4 includes a U-shaped beam 41 and a sealing plate 42 closing the opening side of the U-shaped beam 41 . Since the top and bottom surfaces of the trailing edge beam 4 are to be bonded to the inner walls of the windward shell 1 and the leeward shell 2, there is a certain degree of difficulty in processing. On the one hand, the convenience of processing the trailing edge beam 4 can be improved, and at the same time, the overall structural strength of the trailing edge beam 4 can be improved through the setting of the sealing plate 42 .

In the embodiment of the present utility model, as shown in Fig. 2 and Fig. 6, the longitudinal stiffener 32 is a T-shaped beam, including a base plate 32a and a vertical plate 32b connected with the base plate 32a, the base plate 32a is connected to the windward side shell 1 or the leeward side. The inner wall of the surface case 2 is bonded. Please refer to Fig. 2, in the embodiment of the utility model, since the shell 1 on the windward side and the shell 2 on the leeward side are arc-shaped surfaces, the longitudinal rib 32 is set as a T-shaped beam, on the one hand, it can realize a T-shaped beam. The bottom plate 32a of the beam is attached to the inner wall of the windward shell 1 or the leeward shell 2 to improve connection reliability. On the other hand, the overall structural strength of the longitudinal rib 32 is strengthened by setting the vertical plate 32b.

Please continue to refer to FIG. 2 , in the embodiment of the present invention, a plurality of longitudinal reinforcing ribs 32 are arranged in parallel and at intervals along the width direction of the wind turbine blade, and vertical plates 32b are arranged in parallel. Through the arrangement in this way, the vertical plates 32b are arranged along the direction perpendicular to the plane where the rotation direction of the blade is located, thereby improving the overall shear resistance of the blade.

In the embodiment of the present utility model, the specific structural form of the I-beam 33 is as shown in FIG. 33b are attached to the inner wall of the windward side housing 1 and the inner wall of the leeward side housing 2 respectively. In this way, the I-beam 33 transmits the load borne by the windward shell 1 or the leeward shell 2, which can effectively disperse the force, thereby avoiding local stress concentration and improving the overall reliability of the blade.

In some embodiments of the present invention, a plurality of I-beams 33 are arranged in parallel at intervals along the width direction of the blade, and the webs 33a of the plurality of I-beams 33 are arranged in parallel. In addition, it needs to be pointed out here that, in the embodiment of the present invention, the I-beam 33 and the longitudinal rib 32 are arranged at intervals. By setting in this way, the I-beam 33 also functions as the longitudinal rib 32 at the same time. effect.

In the embodiment of the present invention, in order to improve the overall structural strength of the reinforcement assembly 3, as shown in Figure 2 and Figure 7, there is also a reinforcement block 33c between the web 33a and the wing plate 33b of the I-beam 33, the reinforcement block 33c is arranged in abutment with the transverse reinforcing rib 31 . Through this arrangement, the transverse rib 31 is connected to the I-beam 33, and then the load borne by the windward shell 1 or the leeward shell 2 can be transmitted to the work through the transverse rib 31 and the longitudinal rib 32. On the word beam 33, the stiffness of the blade as a whole is improved.

Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. A modular wind turbine blade fixing structure, characterized in that it includes a windward shell and a leeward shell oppositely arranged, and a reinforcement assembly arranged between the windward shell and the leeward shell, wherein: The reinforcement assembly includes transverse reinforcement ribs, longitudinal reinforcement ribs and I-beams, the windward side shell and the leeward side shell are joined together, and the combined cross section forms a complete blade section structure; The width direction is attached to the inner wall of the windward side shell and the leeward side shell, and the longitudinal rib is attached to the inner wall of the windward side and the leeward side shell in a direction perpendicular to the transverse rib, A plurality of I-beams are arranged in parallel along the length direction of the wind power blade, and the top and bottom of the I-beams are respectively connected to the inner walls of the windward shell and the leeward shell. 2. The modularized wind turbine blade fixing structure according to claim 1, characterized in that, the front edge parts of the windward side shell and the leeward side shell in the width direction both have connecting parts that are folded inward, and the two sides The connecting portion is a plate-like structure arranged in parallel, and the front edge portions of the shell on the windward side and the shell on the leeward side are connected through the connecting portion. 3. The modularized wind power blade fixing structure according to claim 2, characterized in that there is a structural adhesive layer between the two connecting parts. 4. The modular wind turbine blade fixing structure according to claim 1, characterized in that, the windward side shell and the leeward side shell also have trailing edge beams at the trailing edge positions in the width direction, and the trailing edge beams It extends along the length direction of the wind power blade, and the bottom surface is attached to and connected with the inner wall of the leeward shell, and the top surface is attached and connected with the inner wall of the windward shell. 5 . The modular wind turbine blade fixing structure according to claim 4 , wherein the trailing edge beam comprises a U-shaped beam and a sealing plate that closes the opening side of the U-shaped beam. 6 . 6. The modular wind turbine blade fixing structure according to claim 1, wherein the longitudinal reinforcement is a T-shaped beam, including a bottom plate and a vertical plate connected to the bottom plate, and the bottom plate is connected to the windward side shell Or the inner wall of the shell on the leeward side is attached. 7. The modularized wind power blade fixing structure according to claim 6, wherein a plurality of longitudinal reinforcing ribs are arranged in parallel and spaced along the width direction of the wind power blade, and the vertical plates are arranged in parallel. 8. The modular wind turbine blade fixing structure according to claim 1, wherein the I-beam comprises a middle web and wing plates arranged at the top and bottom of the web, and the two wing plates are respectively connected to the The inner wall of the shell on the windward side and the inner wall of the shell on the leeward side are bonded together. 9. The modularized wind power blade fixing structure according to claim 8, wherein a plurality of said I-beams are arranged in parallel at intervals along the blade width direction, and said webs of said plurality of I-beams are parallel to each other. set up. 10. The modularized wind turbine blade fixing structure according to claim 9, characterized in that, there is a reinforcement block between the web and the wing of the I-beam, and the reinforcement block is arranged in abutment with the transverse reinforcement .

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