Blades and wind turbines

Abstract

The present application relates to a blade and a wind turbine generator set, wherein the blade includes an outer shell, a web, and a connecting component. The outer shell includes a windward shell and a leeward shell that are arranged opposite to each other, and the windward shell and the leeward shell enclose a hollow space. The web is arranged in the hollow space and is connected to the windward shell and the leeward shell, respectively. The connecting component is located between the web and at least one of the windward shell and the leeward shell, and the web is indirectly connected to at least one of the windward shell and the leeward shell via the connecting component. The connecting component includes a first groove body that is recessed along the thickness direction of the outer shell, and the web and the first groove body are at least partially stacked and fixedly connected to each other. The embodiments of the present application can improve the connection strength between the web and the outer shell, which is conducive to reducing the number of maintenance and maintenance costs, and improving the safety and reliability of the blade.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to blades and wind turbine generator sets. Background Art

[0002] In recent years, wind power generation has developed rapidly as a clean energy source. In order to better convert wind energy into electrical energy and improve conversion efficiency, research on wind turbine blades has attracted more and more attention.

[0003] The web is a key supporting structure in the blade. When manufacturing the blade, the web is often directly bonded to the skin. However, due to the incompatibility between the height of the web and the gap between the skin, the glue layer between the web and the skin is too thick or too thin. Among them, a too thick glue layer will not only reduce the bonding strength, but also easily fall off and debond, increasing subsequent maintenance work. A too thin glue layer will directly lead to the glue layer not meeting the design requirements, insufficient bonding strength, increased maintenance workload and maintenance costs, and reduced safety and reliability. Summary of the Invention

[0004] The embodiments of the present application provide a blade and a wind turbine generator set, which can improve the connection strength between the web and the outer shell, help reduce the maintenance frequency and maintenance costs, and improve the safety and reliability of the blade.

[0005] On the one hand, according to an embodiment of the present application, a blade is proposed, including: an outer shell, including a windward shell and a leeward shell that are relatively arranged, and the windward shell and the leeward shell are enclosed to form a hollow space; a web, arranged in the hollow space and connected to the windward shell and the leeward shell respectively; a connecting component, located between at least one of the windward shell and the leeward shell and the web, and the web is indirectly connected to at least one of the windward shell and the leeward shell through the connecting component, and the connecting component includes a first groove body recessed along the thickness direction of the outer shell, and the web and the first groove body are at least partially stacked on each other and fixedly connected.

[0006] According to one aspect of an embodiment of the present application, the first trough body includes a first bottom wall and first side walls arranged in pairs and spaced apart in the chord direction of the shell, and the web is stacked and adhesively connected to at least one of the first side wall and the first bottom wall.

[0007] According to one aspect of an embodiment of the present application, the first bottom wall and the first side walls arranged in a pair enclose a first accommodating cavity having a first opening; wherein the web extends into the first accommodating cavity from the first opening and is connected to the first trough body; or, the web is arranged outside the first accommodating cavity and connected to the first bottom wall to be connected to the first trough body.

[0008] According to one aspect of an embodiment of the present application, along the axial direction of the outer shell, the first side walls arranged in pairs have a variable height structure, and the size of the first side walls in the thickness direction tends to decrease from one of the blade root section and the blade tip section of the outer shell to the other side, and the decreasing trend includes one of a gradual decrease and a segment-by-segment decrease.

[0009] According to one aspect of an embodiment of the present application, the paired first side walls extend away from the first bottom wall by a predetermined length along the thickness direction; or, at least one of the paired first side walls extends away from the first bottom wall by a predetermined length along a direction intersecting the thickness direction.

[0010] According to one aspect of an embodiment of the present application, the first bottom wall is connected to one of the windward shell and the leeward shell; wherein the web extends from the first opening into the first accommodating cavity and is fixedly connected to the first side walls arranged in a pair; or, the web extends from the first opening into the first accommodating cavity and is fixedly connected to the first side walls and the first bottom wall arranged in a pair.

[0011] According to one aspect of an embodiment of the present application, the portion of the web extending into the first accommodating cavity matches the shape of the first accommodating cavity, and the orthographic projection of the portion of the web extending into the first accommodating cavity in the axial direction of the outer shell is one of a rectangular structure, a trapezoidal structure, a waisted circular structure, and a semicircular structure.

[0012] According to one aspect of an embodiment of the present application, the connecting component also includes a connecting plate, one end of which is connected to one of the windward shell and the leeward shell and the other end extends into the first accommodating cavity to be connected to the first trough body, and the web is connected to the end of the first bottom wall facing away from the first accommodating cavity.

[0013] According to one aspect of an embodiment of the present application, the connecting plate extends from the first opening into the first accommodating cavity and is fixedly connected to the first side walls arranged in a pair; or, the connecting plate extends from the first opening into the first accommodating cavity and is fixedly connected to the first side walls and the first bottom wall arranged in a pair.

[0014] According to one aspect of an embodiment of the present application, the portion of the connecting plate extending into the first accommodating cavity matches the shape of the first accommodating cavity, and the orthographic projection of the portion of the connecting plate extending into the first accommodating cavity in the axial direction of the outer shell is one of a rectangular structure, a trapezoidal structure, a waisted circular structure, and a semicircular structure.

[0015] According to one aspect of an embodiment of the present application, the connecting component also includes a second trough body recessed along the thickness direction, the second trough body includes a second bottom wall and second side walls arranged in pairs and spaced apart in the chordal direction, the second bottom wall and the second side walls arranged in pairs enclose a second accommodating cavity having a second opening, and the first opening and the second opening are arranged opposite to each other; the second bottom wall is connected to one of the windward surface shell and the leeward surface shell, one end of the connecting plate extends into the first accommodating cavity and the other end extends into the second accommodating cavity to connect the first trough body and the second trough body.

[0016] According to one aspect of the embodiment of the present application, the first trough body and the second trough body are symmetrical in the thickness direction.

[0017] According to one aspect of an embodiment of the present application, the connecting plate extends from the second opening into the second accommodating cavity and is fixedly connected to the second side walls arranged in a pair; or, the connecting plate extends from the second opening into the first accommodating cavity and is fixedly connected to the second side walls and the second bottom wall arranged in a pair.

[0018] According to one aspect of an embodiment of the present application, the windward side shell includes a first main beam, the leeward side shell includes a second main beam arranged opposite to the first main beam, the web is connected between the first main beam and the second main beam, and the connecting component is connected between at least one of the first main beam and the second main beam and the web.

[0019] According to one aspect of an embodiment of the present application, the windward side shell includes a first main beam and a first auxiliary beam spaced apart from the first main beam along the chord direction of the shell, and the leeward side shell includes a second main beam arranged opposite to the first main beam and a second auxiliary beam arranged opposite to the first auxiliary beam, the web is connected between the first auxiliary beam and the second auxiliary beam, and the connecting component is connected between at least one of the first auxiliary beam and the second auxiliary beam and the web.

[0020] On the other hand, according to an embodiment of the present application, a wind turbine generator set is proposed, including a hub; and blades such as those described above are connected to the hub.

[0021] The blade and wind turbine generator set provided in the embodiments of the present application include a shell, a web, and a connecting component. The connecting component is disposed between the web and at least one of the windward shell and the leeward shell, so that the web can be indirectly connected to at least one of the windward shell and the leeward shell via the connecting component. The connecting component includes a first groove recessed along the thickness direction of the shell, and the web and the first groove are at least partially stacked and fixedly connected. This arrangement allows the web to be connected to at least one of the windward shell and the leeward shell by selecting a connecting component compatible with the web. This avoids the problem of the web height not matching the gap between the windward shell and the leeward shell in the thickness direction, which would result in an overly thick or thin adhesive layer that is prone to failure. This improves the connection strength between the web and the shell, thereby improving the connection strength of the blade, reducing the number of maintenance times and maintenance costs, and improving safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic structural diagram of a wind turbine generator set according to an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of a blade according to an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the partial structure of a blade according to an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the partial structure of a blade according to an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to an embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to an embodiment of the present application;

[0029] Figure 7 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to another embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to another embodiment of the present application;

[0031] Figure 9 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to another embodiment of the present application;

[0032] Figure 10 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to another embodiment of the present application;

[0033] Figure 11 This is a schematic structural diagram of a connecting component in a blade according to an embodiment of the present application;

[0034] Figure 12 This is a schematic structural diagram of a connecting component in a blade according to another embodiment of the present application;

[0035] Figure 13 This is a schematic structural diagram of a connecting component in a blade according to another embodiment of the present application;

[0036] Figure 14 This is a schematic structural diagram of a connecting component in a blade according to another embodiment of the present application.

[0037] Figure 15 This is a schematic diagram of the connection structure between the web and the connection component in a blade according to another embodiment of the present application;

[0038] Figure 16 This is a schematic diagram of the partial structure of a blade according to another embodiment of the present application.

[0039] in:

[0040] 100-blade; 10-housing; 10a-hollow space; 11-windward shell; 111-first main beam; 12-leeward shell; 121-second main beam; 101-root section; 102-tip section; 20-web;

[0041] 30 - connecting member; 31 - first slot; 31a - first opening; 31b - first accommodating cavity; 311 - first bottom wall; 312 - first side wall; 32 - connecting plate; 33 - second slot; 32a - second opening; 33b - second accommodating cavity; 331 - second bottom wall; 332 - second side wall;

[0042] 200-hub; 300-tower; 400-nacelle; 500-generator;

[0043] X-thickness direction; Y-chord direction; Z-axial direction. DETAILED DESCRIPTION

[0044] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0045] The directional words appearing in the following description are all directions shown in the figures, and do not limit the blades and wind turbines of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0046] In order to better understand this application, Figures 1 to 16 The blades and wind turbine generator set according to the application embodiments are described in detail.

[0047] See also Figure 1 and Figure 2 , Figure 1 The following is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present application. The embodiment of the present application provides a wind turbine generator set comprising a hub 200 and blades 100, wherein the blades 100 are connected to the hub 200. Of course, the wind turbine generator set also includes a tower 300, a nacelle 400, and a generator 500. The tower 300 is connected to the wind turbine foundation, the nacelle 400 is disposed at the top of the tower 300, and the generator 500 is disposed within the nacelle 400. In some examples, the generator 500 may be located outside the nacelle 400. Of course, in some examples, the generator 500 may also be located inside the nacelle 400. The entire structure of the plurality of blades 100 connected to the hub 200 is referred to as an impeller. The impeller is connected to the rotating shaft of the generator 500 via its hub 200. When wind force acts on the blades 100, it drives the entire impeller and the rotating shaft of the generator 500 to rotate, thereby converting wind energy into electrical energy.

[0048] During the manufacturing process of blades, the web is an important supporting structure of the blade, and the web is usually connected to the windward and leeward skins of the blade shell. The existing method of connecting the web and the skin often uses an adhesive to directly bond the web to the skin along one side of the blade shell in the thickness direction. However, this method requires that the height of the web in the thickness direction be adapted to the gap between the windward skin and the leeward skin in order to reasonably control the thickness of the adhesive layer of the bonded web. However, it is often the case that the height of the web is not adapted to the gap between the windward skin and the leeward skin, resulting in the problem of the adhesive layer being too thick or too thin. Among them, an excessively thick adhesive layer will not only reduce the bonding strength, but also easily cause slag and debonding, increasing subsequent maintenance work. An excessively thin adhesive layer will directly lead to the adhesive layer not meeting the design requirements, insufficient bonding strength, increased maintenance workload and maintenance costs, and reduced safety and reliability.

[0049] Based on the above-mentioned defects, an embodiment of the present application provides a blade 100, whose web 20 is beneficial to improving the connection strength when connected to the inside of the blade 100, reducing the maintenance frequency and maintenance cost, thereby improving the safety and reliability of the blade 100.

[0050] The blade 100 provided in the embodiment of the present application can be produced and sold separately as an independent component. Of course, it can also be used in a wind turbine generator set and serve as a component of the wind turbine generator set.

[0051] See also Figures 2 to 4 The embodiment of the present application provides a blade 100, comprising an outer shell 10, a web 20, and a connecting component 30. The outer shell 10 comprises a windward shell 11 and a leeward shell 12 arranged opposite to each other, and the windward shell 11 and the leeward shell 12 enclose a hollow space 10a. The web 20 is disposed in the hollow space 10a and is connected to the windward shell 11 and the leeward shell 12, respectively. The connecting component 30 is located between the web 20 and at least one of the windward shell 11 and the leeward shell 12. The web 20 is indirectly connected to at least one of the windward shell 11 and the leeward shell 12 via the connecting component 30. The connecting component 30 comprises a first groove 31 recessed along the thickness direction X of the outer shell 10. The web 20 and the first groove 31 are at least partially stacked and fixedly connected to each other.

[0052] An embodiment of the present application provides a blade 100 , which includes a shell 10 , a web 20 , and a connecting component 30 . By arranging the connecting component 30 between at least one of the windward shell 11 and the leeward shell 12 and the web 20, the web 20 can be indirectly connected to at least one of the windward shell 11 and the leeward shell 12 through the connecting component 30. The connecting component 30 includes a first groove body 31 recessed along the thickness direction X of the outer shell 10. The web 20 and the first groove body 31 are at least partially overlapped with each other and fixedly connected. By arranging in this manner, the connecting component 30 adapted to the web 20 can be selected to connect it between the web 20 and at least one of the windward shell 11 and the leeward shell 12. This avoids the problem of reduced connection strength due to the adhesive layer being too thick or too thin due to the mismatch between the height of the web 20 and the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X. This helps to improve the connection strength between the web 20 and the outer shell 10, thereby improving the connection strength of the blade 100, and helps to reduce the number of maintenance times and maintenance costs, thereby improving safety and reliability.

[0053] The shell 10 has a thickness direction X, and of course, the shell 10 also has a chord direction Y and an axial direction Z. The shell also has a blade root section 101 and a blade tip section 102 in the axial direction Z. When the blade 100 is applied to a wind turbine, it can be connected to the hub 200 via its blade root section 101.

[0054] Optionally, the number of webs 20 can be set as required. In some optional embodiments, it can be set to one. Of course, in some other examples, the number of webs 20 can also be set to two or more. When there are two or more webs 20, the two or more webs 20 are spaced apart along the chord direction Y. One end of each web 20 is connected to one of the windward shell 11 and the leeward shell 12, and the other end is connected to the other of the windward shell 11 and the leeward shell 12. The number of webs 20 can be set based on parameters such as the size of the blade 100 and the size of the housing 10.

[0055] Optionally, the number of connecting components 30 may be the same as the number of webs 20 , that is, when there is one web 20 , there is also one connecting component 30 ; when there are two webs 20 , there are also two connecting components 30 .

[0056] For the convenience of description, the following example illustrates that the connecting component 30 is disposed between the windward shell 11 and the web 20 , but it should be understood that the present application does not limit this.

[0057] Specifically, during the manufacturing process of the blade 100, one side of the web 20 along the thickness direction X can be first connected to the leeward shell 12. Then, based on the gap between the other side of the web 20 along the thickness direction X and the windward shell 11, an appropriate connecting component 30 is selected and positioned between the two sides. The first groove 31 of the connecting component 30 and the web 20 are at least partially stacked and fixedly connected. Then, the first groove 31 is connected to the windward shell 11 to complete the manufacturing process. Of course, the first groove 31 can also be connected to the windward shell 11 first, and then the first groove 31 and the web 20 are at least partially stacked and fixedly connected. This application is not limited to this.

[0058] See also Figures 3 to 6 In some optional embodiments, the first trough body 31 includes a first bottom wall 311 and first side walls 312 arranged in pairs and spaced apart in the chord direction Y of the shell 10, and the web 20 is stacked and adhesively connected to at least one of the first side wall 312 and the first bottom wall 311.

[0059] By setting it up in this way, while ensuring the connection strength, it is also conducive to improving the flexibility and versatility of use.

[0060] like Figure 3 and Figure 5 As shown, optionally, the web 20 and the first side wall 312 are stacked and bonded together. Specifically, the web 20 and the first side wall 312 can be stacked along the chord direction Y. That is, the first slot 31 is disposed between the web 20 and the windward shell 11, and the first bottom wall 311 of the first slot 31 is disposed away from the web 20, so that the web 20 and the first side wall 312 can be stacked along the chord direction Y.

[0061] like Figure 4 and Figure 6 As shown, the web 20 and the first bottom wall 311 are optionally stacked and bonded together. Specifically, the web 20 and the first bottom wall 311 can be stacked along the thickness direction X. That is, the first groove 31 is disposed between the web 20 and at least one of the windward shell 11 and the leeward shell 12, and the first side wall 312 of the first groove 31 is disposed away from the web 20, so that the web 20 can be stacked along the thickness direction X with the first bottom wall 311.

[0062] Optionally, the web 20 and at least one of the first side wall 312 and the first bottom wall 311 may be fixedly connected by bonding, for example, by gluing.

[0063] Please continue reading Figure 3 and Figure 5In some optional embodiments, the first bottom wall 311 and the paired first side walls 312 enclose a first accommodating cavity 31b having a first opening 31a, wherein the web 20 extends from the first opening 31a into the first accommodating cavity 31b and is connected to the first trough body 31.

[0064] By arranging in this manner, the web 20 and the first side wall 312 are stacked to connect with the first trough body 31, which is beneficial to improving the connection strength between the web 20 and the first trough body 31, and is beneficial to improving assembly efficiency and reducing maintenance times and maintenance costs.

[0065] Specifically, the web 20 extends from the first opening 31a into the first accommodating cavity 31b and is connected to the first slot body 31. It can be understood that the web 20 can be connected to the first side wall 312 in the first accommodating cavity 31b. Of course, the web 20 can be connected to the first side wall 312 and the first bottom wall 311 in the first accommodating cavity 31b. That is to say, one side surface of the web 20 itself along the chord direction Y and one side surface along the thickness direction X can be connected to the first slot body 31, which is beneficial to increase the connection area between the web 20 and the first slot body 31, thereby improving the connection strength, and then improving the connection strength of the blade 100, reducing the number of maintenance and maintenance costs.

[0066] It can be understood that the connection method of the existing web 20 is usually to connect it only on one side in the thickness direction X to the windward shell 11 and the leeward shell 12. The connection area is small and not easy to adapt. However, through the above embodiment, it is not only beneficial to increase the connection area, but also can adapt to the situation where the height of the web 20 in the thickness direction X does not match the gap between the windward shell 11 and the leeward shell 12 according to the distance of the web 20 extending from the first opening 31a into the first accommodating cavity 31b, which is beneficial to improving the flexibility and versatility of use, and is simple to operate, which is beneficial to improving assembly efficiency.

[0067] Please continue reading Figure 4 and Figure 6 As an optional embodiment, the first bottom wall 311 and the paired first side walls 312 enclose a first accommodating cavity 31b having a first opening 31a, and the web 20 is arranged outside the first accommodating cavity 31b and connected to the first bottom wall 311 to be connected to the first trough body 31.

[0068] By arranging in this manner, the web 20 and the first bottom wall 311 are stacked to connect with the first trough body 31, which is beneficial to improving the connection strength between the web 20 and the first trough body 31, and is beneficial to improving assembly efficiency and reducing maintenance times and maintenance costs.

[0069] Specifically, the web 20 is connected to the first bottom wall 311 to be connected to the first trough body 31, that is, the opening of the first accommodating cavity 31b is set back to the web 20. In other words, an adaptive connecting component 30 can be selected to connect the web 20 with one of the windward shell 11 and the leeward shell 12 to improve the connection strength, and it is beneficial to improve the assembly efficiency and reduce the number of maintenance and maintenance costs.

[0070] In some optional embodiments, along the axial direction Z of the outer shell 10, the paired first side walls 312 have a variable height structure, and the size of the first side walls 312 in the thickness direction X tends to decrease from one of the blade root segment 101 and the blade tip segment 102 of the outer shell 10 to the other side, and the decreasing trend includes one of a gradual decrease and a step-by-step decrease.

[0071] This arrangement helps avoid the risk of misalignment when the web 20 is connected to the first trough body 31 , thereby improving assembly efficiency.

[0072] When the connection method between the web 20 and the first trough body 31 is set so that the web 20 extends into the first accommodating cavity 31b from the first opening 31a, the paired first side walls 312 are made to have a variable height structure, so that the web 20 can extend into the first accommodating cavity 31b along the thickness direction X more conveniently and accurately.

[0073] Specifically, one end of the web 20 along the axial direction Z can be first extended into the first accommodating cavity 31b with a higher height of the first side wall 312, and then the other end of the web 20 can be extended into the first accommodating cavity 31b with a lower height of the first side wall 312 to improve assembly efficiency and connection accuracy.

[0074] Optionally, the size of the first side walls 312 arranged in pairs in the thickness direction X can show a decreasing trend from the blade root section 101 to the blade tip section 102 of the outer shell 10. Of course, the size of the first side walls 312 arranged in pairs in the thickness direction X can also show a decreasing trend from the blade tip section 102 to the blade root section 101 of the outer shell 10.

[0075] Optionally, the decreasing trend includes a gradually decreasing trend. Of course, it may also include a segment-by-segment decreasing trend. For example, the orthographic projection of the first side wall 312 in the thickness direction X is a stepped structure.

[0076] See also Figure 5 and Figure 8 In some optional embodiments, the first side walls 312 arranged in pairs extend along the thickness direction X away from the first bottom wall 311 by a predetermined length.

[0077] It is understood that, in the thickness direction X, the orthographic projection of the first trough body 31 may be one of a U-shaped structure and a ∏-shaped structure, wherein the U-shaped structure means that its first bottom wall 311 may be an arc-shaped structure, and the paired first side walls 312 extend away from the first bottom wall 311 by a predetermined length along the thickness direction X. The ∏-shaped structure means that its first bottom wall 311 may be a linear structure, and the paired first side walls 312 extend away from the first bottom wall 311 by a predetermined length along the thickness direction X.

[0078] See also Figure 7 As an optional embodiment, at least one of the paired first side walls 312 extends away from the first bottom wall 311 along a direction intersecting the thickness direction X by a predetermined length.

[0079] It can be understood that in the thickness direction X, the positive projection of the first trough body 31 can be a trapezoidal structure, which means that its first bottom wall 311 can be a straight structure, and the first side walls 312 arranged in pairs extend away from the first bottom wall 311 along a direction intersecting with the thickness direction X for a predetermined length.

[0080] See also Figure 9 In some optional embodiments, the first groove body 31 may also include a first sub-side wall 312a, a first bottom wall 311 and a second sub-side wall 312b connected in sequence, and at least one of the first sub-side wall 312a and the second sub-side wall 312b extends away from the first bottom wall 311 along a direction intersecting with the thickness direction X for a predetermined length.

[0081] Exemplarily, the first sub-side wall 312a extends away from the first bottom wall 311 by a predetermined length along a direction intersecting the thickness direction X, and the second sub-side wall 312b extends away from the first bottom wall 311 by a predetermined length along the thickness direction X, so that the positive projection of the first trough body 31 in the thickness direction X can be a V-shaped structure.

[0082] Please continue reading Figures 3 to 8 In some optional embodiments, the first bottom wall 311 is connected to one of the windward shell 11 and the leeward shell 12, wherein the web 20 extends from the first opening 31a into the first accommodating cavity 31b and is fixedly connected to the paired first side walls 312.

[0083] It is understandable that when assembling the web 20 in the hollow space 10a of the outer shell 10, the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X may not match the height of the web 20. If the height of the web 20 is shorter than the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X, the web 20 can be assembled by only connecting it to the first side wall 312 but not to the first bottom wall 311.

[0084] For example, during the assembly process, first, the first slot 31 is connected to the windward shell 11. Then, one end of the web 20 is connected to the leeward shell 12. This connection method can be adhesive or other methods, which are not limited in this application. Next, adhesive is injected into the first slot 31, and the other end of the web 20 is inserted into the first accommodating cavity 31b to securely connect it to the paired first sidewalls 312.

[0085] As an optional embodiment, the web 20 extends from the first opening 31 a into the first accommodating cavity 31 b and is fixedly connected to the first side wall 312 and the first bottom wall 311 that are arranged in pairs.

[0086] It can be understood that the length of the web 20 along the thickness direction X is sufficient to extend into the first accommodating cavity 31b and connect to the first bottom wall 311. At this time, the web 20 extends into the first accommodating cavity 31b and is fixedly connected to the paired first side walls 312 and the first bottom wall 311.

[0087] By setting in the above manner, regardless of whether the height of the web 20 matches the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X, they can be connected and formed by the connecting component 30, which not only ensures the connection strength but also helps to improve the flexibility and versatility of use.

[0088] Please continue reading Figures 5 to 9 In some optional embodiments, the portion of the web 20 extending into the first accommodating cavity 31b matches the shape of the first accommodating cavity 31b, and the orthographic projection of the portion of the web 20 extending into the first accommodating cavity 31b on the axial direction Z of the shell 10 is one of a rectangular structure, a trapezoidal structure, a waisted circular structure, and a semicircular structure.

[0089] like Figure 5 As shown, optionally, the portion of the web 20 extending into the first accommodating cavity 31b has a rectangular structure as its orthographic projection in the axial direction Z of the housing 10, so as to adapt to the first slot body 31 having a Π-shaped structure as its orthographic projection in the thickness direction X.

[0090] like Figure 7 As shown, optionally, the portion of the web 20 extending into the first accommodating cavity 31 b has a trapezoidal structure in its orthographic projection in the axial direction Z of the housing 10 , so as to adapt to the first slot body 31 having a trapezoidal structure in its orthographic projection in the thickness direction X.

[0091] like Figure 8 As shown, optionally, the portion of the web 20 extending into the first accommodating cavity 31 b has an orthographic projection in the axial direction Z of the housing 10 that is a waisted circular structure, so as to adapt to the first slot body 31 having an orthographic projection in the thickness direction X that is a U-shaped structure.

[0092] like Figure 9As shown, optionally, the portion of the web 20 extending into the first accommodating cavity 31 b has a conical structure in its orthographic projection in the axial direction Z of the housing 10 to adapt to the first slot body 31 having a V-shaped structure in its orthographic projection in the thickness direction X.

[0093] Optionally, the portion of the web 20 extending into the first accommodating cavity 31 b has a semicircular structure as its orthographic projection in the axial direction Z of the housing 10 , so as to adapt to the first slot body 31 having a 180° flipped Π-shaped structure as its orthographic projection in the thickness direction X.

[0094] During the manufacturing process of the web 20, the shape of one end thereof can be pre-designed to match the first accommodating cavity 31b of the first trough body 31. The length of the web 20 designed to be in this shape can be equal to the length of the accommodating cavity along the thickness direction X. Of course, it can also be set to be unequal.

[0095] Please continue reading Figure 4 and Figure 10 In some optional embodiments, the connecting component 30 further includes a connecting plate 32, one end of the connecting plate 32 is connected to one of the windward shell 11 and the leeward shell 12 and the other end extends into the first accommodating cavity 31b to be connected to the first trough body 31, and the web 20 is connected to one end of the first bottom wall 311 facing away from the first accommodating cavity 31b.

[0096] In an embodiment of the present application, the connecting component 30 may include a connecting plate 32 and a first slot body 31, that is, the web 20 can be connected to one of the windward shell 11 and the leeward shell 12 through the connecting plate 32 and the first slot body 31, which is beneficial to improve the connection strength and reduce the maintenance frequency and maintenance cost.

[0097] Exemplarily, during the assembly process, first, one end of the connecting plate 32 is connected to the windward shell 11, and the web 20 is connected to the end of the first bottom wall 311 of the first trough body 31 facing away from the first accommodating cavity 31b, then, the adhesive is injected into the first accommodating cavity 31b, and finally, the other end of the connecting plate 32 is extended into the first accommodating cavity 31b to be connected to the first trough body 31.

[0098] By setting it up in this way, the length of the connecting plate 32 extending into the first accommodating cavity 31b can be used to adapt to the mismatch between the height of the web 20 in the thickness direction X and the gap between the windward shell 11 and the leeward shell 12. While ensuring the connection strength, it also helps to improve the flexibility and versatility of use.

[0099] In some optional embodiments, the connecting plate 32 extends from the first opening 31 a into the first accommodating cavity 31 b and is fixedly connected to the first side walls 312 arranged in pairs.

[0100] It is understandable that when the web 20 is assembled in the hollow space 10a of the outer shell 10, the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X may not match the height of the web 20 and the first trough body 31. If the height of the web 20 and the first trough body 31 is shorter than the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X, the connecting plate 32 is only connected to the first side wall 312 without being connected to the first bottom wall 311 to complete the assembly operation of the web 20.

[0101] As an optional embodiment, the connecting plate 32 extends from the first opening 31 a into the first accommodating cavity 31 b and is fixedly connected to the first side wall 312 and the first bottom wall 311 that are arranged in a pair.

[0102] It can be understood that the height of the web 20 and the first trough body 31 along the thickness direction X is sufficient to allow the connecting plate 32 to extend into the first accommodating cavity 31b and connect to the first bottom wall 311. At this time, the connecting plate 32 extends into the first accommodating cavity 31b and is fixedly connected to the first side wall 312 and the first bottom wall 311 arranged in pairs.

[0103] By setting in the above manner, in the thickness direction X, regardless of whether the height of the web 20 and the first trough body 31 matches the gap between the windward shell 11 and the leeward shell 12, they can be connected and formed by the connecting plate 32, which not only ensures the connection strength but also helps to improve the flexibility and versatility of use.

[0104] Optionally, the web 20 and the first trough 31 can be integrally formed to improve processing efficiency. Of course, the web 20 and the first trough 31 can also be provided separately. The web 20 and the first trough 31 can be prefabricated separately and then connected to the end of the first bottom wall 311 of the first trough 31 facing away from the first accommodating cavity 31b, which can help reduce processing difficulty and improve usage flexibility.

[0105] See also Figures 10 to 14 In some optional embodiments, the portion of the connecting plate 32 extending into the first accommodating cavity 31b matches the shape of the first accommodating cavity 31b, and the positive projection of the portion of the connecting plate 32 extending into the first accommodating cavity 31b on the axial direction Z of the shell 10 is one of a rectangular structure, a trapezoidal structure, a waisted circular structure, and a semicircular structure.

[0106] Depend on Figure 10 As shown, optionally, the portion of the connecting plate 32 extending into the first accommodating cavity 31b has a rectangular structure as its orthographic projection in the axial direction Z of the housing 10, so as to adapt to the first slot body 31 having a Π-shaped structure as its orthographic projection in the thickness direction X.

[0107] Depend on Figure 11As shown, optionally, the portion of the connecting plate 32 extending into the first accommodating cavity 31 b has a trapezoidal structure in its orthographic projection in the axial direction Z of the housing 10 to adapt to the first slot body 31 having a trapezoidal structure in its orthographic projection in the thickness direction X.

[0108] Depend on Figure 12 As shown, optionally, the portion of the connecting plate 32 extending into the first accommodating cavity 31b has an orthographic projection in the axial direction Z of the housing 10 in a waisted circular structure, so as to adapt to the first slot body 31 having an orthographic projection in the thickness direction X in a U-shaped structure.

[0109] Depend on Figure 13 As shown, optionally, the portion of the connecting plate 32 extending into the first accommodating cavity 31b has a semicircular structure as its orthographic projection in the axial direction Z of the housing 10, so as to adapt to the first slot body 31 having a Π-shaped structure with its orthographic projection in the thickness direction X flipped 180°.

[0110] Depend on Figure 14 As shown, optionally, the portion of the connecting plate 32 extending into the first accommodating cavity 31 b has a conical structure in its orthographic projection in the axial direction Z of the housing 10 to adapt to the first slot body 31 having a V-shaped structure in its orthographic projection in the thickness direction X.

[0111] See also Figure 15 In some optional embodiments, the connecting member 30 further includes a second groove 33 recessed along the thickness direction X. The second groove 33 includes a second bottom wall 331 and a pair of second side walls 332 spaced apart in the chord direction Y. The second bottom wall 331 and the paired second side walls 332 together form a second accommodating cavity 33b having a second opening 32a. The first opening 31a and the second opening 32a are disposed opposite each other. The second bottom wall 331 is connected to one of the windward shell 11 and the leeward shell 12. One end of the connecting plate 32 extends into the first accommodating cavity 31b, and the other end extends into the second accommodating cavity 33b, thereby connecting the first groove 31 and the second groove 33.

[0112] In an embodiment of the present application, the connecting component 30 may include a first groove body 31, a second groove body 33 and a connecting plate 32. That is, the web 20 can be connected to one of the windward shell 11 and the leeward shell 12 through the connecting plate 32, the first groove body 31 and the second groove body 33, which is beneficial to improve the connection strength and reduce the number of maintenance and maintenance costs.

[0113] For example, during the assembly process, first, the end of the second bottom wall 331 of the second trough 33, facing away from the second accommodating cavity 33b, is connected to the windward shell 11. Furthermore, the web 20 is connected to the end of the first bottom wall 311 of the first trough 31, facing away from the first accommodating cavity 31b, such that the first opening 31a and the second opening 32a are opposite each other. Then, adhesive is injected into the first accommodating cavity 31b and the second accommodating cavity 33b. Finally, one end of the connecting plate 32 is extended into the first accommodating cavity 31b to connect to the first trough 31, and the other end of the connecting plate 32 is extended into the second accommodating cavity 33b to connect to the second trough 33.

[0114] Optionally, the connecting plate 32 may be connected to the first accommodating cavity 31 b first, or may be connected to the second accommodating cavity 33 b first, which is not limited in the present application.

[0115] By setting it up in this way, the length of the connecting plate 32 extending into the first accommodating cavity 31b and the length of the connecting plate 32 extending into the second accommodating cavity 33b can be adapted to the situation where the height of the web 20 in the thickness direction X does not match the gap between the windward shell 11 and the leeward shell 12. While ensuring the connection strength, it also helps to improve the flexibility and versatility of use.

[0116] In some optional embodiments, the first trough body 31 and the second trough body 33 are symmetrical in the thickness direction X.

[0117] By configuring in this manner, the connecting plate 32 can be better connected to the first trough body 31 and the second trough body 33 , and is also convenient for processing and manufacturing the connecting plate 32 , thereby improving processing efficiency.

[0118] In some optional embodiments, the connecting plate 32 extends from the second opening 32 a into the second accommodating cavity 33 b and is fixedly connected to the second side walls 332 arranged in pairs.

[0119] It is understandable that when the web 20 is assembled in the hollow space 10a of the outer shell 10, the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X may not match the overall height of the web 20, the first trough body 31, and the second trough body 33. If the overall height of the web 20 and the first trough body 31 and the second trough body 33 is shorter than the gap between the windward shell 11 and the leeward shell 12 in the thickness direction X, the connecting plate 32 is only connected to the second side wall 332 without being connected to the second bottom wall 331 to complete the assembly operation of the web 20.

[0120] As an optional embodiment, the connecting plate 32 extends into the first accommodating cavity 31 b through the second opening 32 a and is fixedly connected to the second side wall 332 and the second bottom wall 331 that are arranged in pairs.

[0121] It can be understood that the overall height of the web 20 and the first and second trough bodies 31 and 33 along the thickness direction X is sufficient to allow the connecting plate 32 to extend into the second accommodating cavity 33b and connect to the second bottom wall 331. At this time, the connecting plate 32 extends into the second accommodating cavity 33b and is fixedly connected to the second side walls 332 and the second bottom wall 331 arranged in pairs.

[0122] By setting in the above manner, in the thickness direction X, regardless of whether the overall height of the web 20 and the first and second trough bodies 31 and 33 matches the gap between the windward shell 11 and the leeward shell 12, they can be connected and formed by the connecting plate 32, which not only ensures the connection strength but also helps to improve the flexibility and versatility of use.

[0123] See also Figure 16 In some optional embodiments, the windward shell 11 includes a first main beam 111, the leeward shell 12 includes a second main beam 121 arranged opposite to the first main beam 111, the web 20 is connected between the first main beam 111 and the second main beam 121, and the connecting component 30 is connected between at least one of the first main beam 111 and the second main beam 121 and the web 20.

[0124] Optionally, the first main beam 111 may be integrated on the windward shell 11 and the second main beam 121 may be integrated on the leeward shell 12 .

[0125] Optionally, the windward side shell 11 may further include a first auxiliary beam, which is spaced apart from the first main beam 111 along the chord direction Y, and the first auxiliary beam is located between the first main beam 111 and the trailing edge of the blade 100. The leeward side shell 12 may further include a second auxiliary beam arranged opposite to the first auxiliary beam, the web 20 is connected between the first main beam 111 and the second main beam 121, and the connecting component 30 is connected between at least one of the first main beam 111 and the second main beam 121 and the web 20.

[0126] In some optional embodiments, the windward side shell 11 includes a first main beam 111 and a first auxiliary beam spaced apart from the first main beam 111 along the chord direction Y of the outer shell 10, the leeward side shell 12 includes a second main beam 111 arranged opposite to the first main beam 111 and a second auxiliary beam arranged opposite to the first auxiliary beam, the web 20 is connected between the first auxiliary beam and the second auxiliary beam, and the connecting part 30 is connected between at least one of the first auxiliary beam and the second auxiliary beam and the web 20.

[0127] Optionally, the first auxiliary beam may be integrated on the windward shell 11 and the second auxiliary beam may be integrated on the leeward shell 12 .

[0128] An embodiment of the present application further provides a wind turbine generator set, including a hub 200 and blades 100 provided in the above embodiments, wherein the blades 100 are connected to the hub 200 .

[0129] The wind turbine generator set of the embodiment of the present application includes the blades 100 provided in the above embodiments, which can improve the connection strength, reduce the maintenance frequency and maintenance cost, and improve safety and reliability. Therefore, the safety and reliability of the wind turbine generator set can be improved, and the maintenance frequency and maintenance cost can be reduced.

[0130] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A blade, characterized in that: include: The housing comprises a windward shell and a leeward shell arranged opposite to each other, wherein the windward shell and the leeward shell enclose a hollow space; a web, disposed in the hollow space and connected to the windward shell and the leeward shell respectively; 18. The foldable container of claim 17, wherein the web is connected to the at least one of the windward shell and the leeward shell via the connecting component, the web being indirectly connected to the at least one of the windward shell and the leeward shell via the connecting component, the connecting component comprising a connecting plate, a first slot body recessed in a thickness direction of the shell, and a second slot body recessed in the thickness direction, the web and the first slot body at least partially overlapping and fixedly connected to each other, the first slot body comprising a first bottom wall and first side walls arranged in a pair and spaced apart in a chord direction of the shell, the first bottom wall and the first side walls arranged in a pair enclosing a first accommodating cavity having a first opening, the web and the first bottom wall being stacked and adhesively connected, the second slot body comprising a second bottom wall and second side walls arranged in a pair and spaced apart in the chord direction, the second bottom wall and the second side walls arranged in a pair enclosing a second accommodating cavity having a second opening, the first opening being arranged opposite to the second opening; Wherein, the second bottom wall is connected to one of the windward shell and the leeward shell, one end of the connecting plate extends into the first accommodating cavity and the other end extends into the second accommodating cavity to connect the first trough body and the second trough body, and the web is connected to the end of the first bottom wall facing away from the first accommodating cavity.

2. The blade according to claim 1, characterized in that The web is arranged outside the first accommodating cavity and connected to the first bottom wall to be connected to the first trough body.

3. The blade according to claim 2, characterized in that Along the axial direction of the shell, the first side walls arranged in pairs have a variable height structure, and the size of the first side walls in the thickness direction tends to decrease from one of the root section and the tip section of the shell to the other side, and the decreasing trend includes one of a gradual decrease and a segment-by-segment decrease.

4. The blade according to claim 3, characterized in that The first side walls arranged in pairs extend away from the first bottom wall along the thickness direction by a predetermined length; Alternatively, at least one of the first side walls provided in a pair extends away from the first bottom wall by a predetermined length along a direction intersecting with the thickness direction.

5. The blade according to claim 1, characterized in that The connecting plate extends from the first opening into the first accommodating cavity and is fixedly connected to the first side walls arranged in pairs; Alternatively, the connecting plate extends from the first opening into the first accommodating cavity and is fixedly connected to the first side wall and the first bottom wall arranged in pairs.

6. The blade according to claim 5, characterized in that The portion of the connecting plate extending into the first accommodating cavity matches the shape of the first accommodating cavity, and the orthographic projection of the portion of the connecting plate extending into the first accommodating cavity in the axial direction of the shell is one of a rectangular structure, a trapezoidal structure, a waisted circular structure and a semicircular structure.

7. The blade according to claim 6, characterized in that The first trough body and the second trough body are symmetrical in the thickness direction.

8. The blade according to claim 1, wherein: The connecting plate extends from the second opening into the second accommodating cavity and is fixedly connected to the second side walls arranged in pairs; or, the connecting plate extends from the second opening into the first accommodating cavity and is fixedly connected to the second side walls and the second bottom wall arranged in pairs.

9. The blade according to claim 1, characterized in that The windward shell includes a first main beam, the leeward shell includes a second main beam arranged opposite to the first main beam, the web is connected between the first main beam and the second main beam, and the connecting component is connected between at least one of the first main beam and the second main beam and the web.

10. The blade according to claim 1, wherein The windward shell includes a first main beam and a first auxiliary beam spaced apart from the first main beam along the chord direction of the shell, and the leeward shell includes a second main beam arranged opposite to the first main beam and a second auxiliary beam arranged opposite to the first auxiliary beam, the web is connected between the first auxiliary beam and the second auxiliary beam, and the connecting component is connected between at least one of the first auxiliary beam and the second auxiliary beam and the web.

11. A wind turbine generator set, characterized in that: include: wheel hub; The blade according to any one of claims 1 to 10 is connected to the hub.

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