Fabric structure, blade main beam, blade and wind generating set

Abstract

The utility model relates to a fabric structure, a blade main beam, a blade and a wind generating set, the fabric structure comprises a plurality of first conductive parts extending along a first direction, the plurality of first conductive parts are arranged along a second direction, and the first direction and the second direction intersect; the plurality of second conductive parts extend along the second direction and are arranged along the first direction; the first conductive parts are in contact connection with the second conductive parts, and the conductivity of the first conductive parts is smaller than that of the second conductive parts. According to the fabric structure, the blade main beam, the blade and the wind generating set provided by the embodiment of the invention, the conductivity of the blade in the width direction can be improved, and conduction of current in the blade can be more uniform and smoother.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a fabric structure, a blade main beam, a blade and a wind power generator set. Background Art

[0002] The main beam cap of the blade of the wind turbine generator set will be made using pultruded plate technology, and the main beam cap structure is formed by arranging multiple pultruded plates in the thickness and width directions. In order to make the blades have the characteristics of large size and low weight, carbon fiber materials will be added to the blades, for example, carbon fiber fabrics are set between the pultruded plates, or only carbon fiber pultruded plates are used directly. Carbon fiber materials have a certain conductivity, but the conductivity is not uniform throughout the blade, so when the current is conducted in the blade, there is a problem of excessive or insufficient current in the local area, which not only affects the conduction of the current, but also causes damage to the blade material. In particular, when the wind turbine blade is struck by lightning, the lightning current will be conducted along the carbon fiber material, and the conduction direction includes the length direction, width direction and thickness direction of the blade. Along the width direction, the lightning current can easily break through the resin material filled between the pultruded plates, reducing the structural strength of the blade. Utility Model Content

[0003] The embodiments of the present application provide a fabric structure, a blade main beam, a blade and a wind turbine generator set, which can improve the conductivity of the blade along the width direction, so that the current can be conducted more evenly and smoothly in the blade.

[0004] In a first aspect, an embodiment of the present application provides a fabric structure, comprising: a plurality of first conductive parts extending along a first direction, the plurality of first conductive parts are arranged along a second direction, and the first direction and the second direction intersect; a plurality of second conductive parts extending along the second direction, the plurality of second conductive parts are arranged along the first direction; the plurality of first conductive parts and the plurality of second conductive parts are in contact and connected, and the conductivity of the first conductive parts is less than the conductivity of the second conductive parts.

[0005] According to an embodiment of the first aspect of the present application, the second conductive part includes at least one of a metal wire, a metal plate, and a metal mesh, and the first conductive part includes a carbon fiber wire.

[0006] According to an embodiment of the first aspect of the present application, the thickness of the fabric structure is D1, and the diameter of the circumscribed circle of the cross-sectional shape of the second conductive portion is D2, wherein 0.8≤D2 / D1≤1.

[0007] According to an embodiment of the first aspect of the present application, the fabric structure also includes a third conductive portion, which extends along the second direction. Two adjacent second conductive portions are provided with at least one third conductive portion, and the conductivity of the third conductive portion is less than the conductivity of the second conductive portion.

[0008] According to an embodiment of the first aspect of the present application, the fabric structure further includes a first electrode, the first electrode extends along the second direction, the first electrode and the second conductive portion are arranged along the first direction, and the first electrode is electrically connected to the first conductive portion.

[0009] In the second aspect, an embodiment of the present application provides a blade main beam, comprising: a layer structure, wherein the multiple layer structures are stacked along a third direction; each layer structure comprises a plurality of plate bodies, each plate body extends along a first direction, and the plurality of plate bodies located in the same layer structure are arranged along a second direction, and the first direction, the second direction and the third direction intersect with each other; the fabric structure of the embodiment of the first aspect of the present application, wherein a fabric structure is arranged between two adjacent layer structures along the third direction, and the second conductive portion bridges at least two adjacent plate bodies along the second direction.

[0010] According to an embodiment of the second aspect of the present application, in the layer structure, a bonding portion is provided between two adjacent plate bodies, and along the third direction, an orthographic projection of the bonding portion at least partially overlaps with an orthographic projection of the second conductive portion.

[0011] According to an embodiment of the second aspect of the present application, the second conductive part includes a metal wire, and along the third direction, the thickness of the plate body is D3, and along the first direction, the axial distance between two adjacent second conductive parts is D4, wherein 1.8≤D4 / D3≤2.2.

[0012] According to an embodiment of the second aspect of the present application, the second conductive part includes a metal plate and / or a metal mesh; the thickness of the plate body is D3, and the width of the second conductive part along the first direction is D5, wherein 0.6≤D5 / D3≤2.

[0013] In a third aspect, an embodiment of the present application provides a blade, comprising the fabric structure of an embodiment of the first aspect of the present application.

[0014] In a fourth aspect, an embodiment of the present application provides a blade, comprising a blade main beam of an embodiment of the second aspect of the present application, wherein the length direction of the blade is parallel to the first direction; and the width direction of the blade is parallel to the second direction.

[0015] In the fifth aspect, an embodiment of the present application provides a wind turbine generator set, comprising: a nacelle; a generator, arranged in the nacelle, the generator comprising a rotor and a stator that are rotatably matched; a hub, connected to the rotor to drive the rotor to rotate relative to the stator; and blades, which are blades according to an embodiment of the fourth aspect of the present application, and the blades are connected to the hub at one end in a first direction.

[0016] In the fabric structure, blade main beam, blade and wind turbine generator set provided by the embodiments of the present application, multiple first conductive parts extending in the first direction and multiple second conductive parts extending in the second direction are in contact and connected with each other, so that the fabric structure can conduct electricity in the first direction and the second direction. When a short circuit occurs at the connection between one or several first conductive parts and the second conductive parts, other connections can still enable the fabric structure to conduct electricity in the first direction and the second direction. When the fabric structure of the embodiments of the present application is used for the blades of the wind turbine generator, the conductivity of the second conductive part is greater, so that the resistance of the storage structure along the second direction is closer to the resistance of the layer structure formed by the plate body of the blade. If the blade is struck by lightning, the lightning current can be conducted more evenly in the blade, reducing the risk of the blade being broken down by the lightning current. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0018] Figure 1 A structural schematic diagram of the fabric structure of an embodiment of the present application.

[0019] Figure 2 This is a schematic diagram of the structure of the fabric structure after being damaged according to an embodiment of the present application.

[0020] Figure 3 Another schematic diagram of the structure of the fabric structure after being damaged according to an embodiment of the present application.

[0021] Figure 4 Another structural schematic diagram of the fabric structure of an embodiment of the present application.

[0022] Figure 5 Another structural schematic diagram of the fabric structure of an embodiment of the present application.

[0023] Figure 6 A schematic diagram of the structure of the blade main beam of an embodiment of the present application.

[0024] Figure 7 This is a cross-sectional view of the blade main beam of an embodiment of the present application perpendicular to the first direction section.

[0025] Figure 8 It is a schematic diagram of an orthographic projection of the plate body and the second conductive part of the blade main beam of an embodiment of the present application perpendicular to the third direction.

[0026] Fig. 9 This is another schematic diagram of the orthographic projection of the plate body and the second conductive part of the blade main beam of an embodiment of the present application perpendicular to the third direction.

[0027] Fig.10This is another schematic diagram of the orthographic projection of the plate body and the second conductive part of the blade main beam of an embodiment of the present application perpendicular to the third direction.

[0028] Fig.11 This is a cross-sectional view of the blade main beam of an embodiment of the present application perpendicular to the second direction section.

[0029] Fig.12 This is another cross-sectional view of the blade main beam of an embodiment of the present application perpendicular to the second direction section.

[0030] Fig.13 This is a cross-sectional view of the blade of an embodiment of the present application perpendicular to the first direction.

[0031] Fig.14 A schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present application.

[0032] Reference numerals:

[0033] 1. Layer structure; 11. Plate body; 12. Adhesive part;

[0034] 2. fabric structure; 21. second conductive part; 22. third conductive part; 23. first conductive part; 24. first electrode;

[0035] 3. Blade; 31. Blade main beam;

[0036] 4. Engine room;

[0037] 5. Generator;

[0038] 6. Wheel hub.

[0039] X, first direction; Y, second direction; Z, third direction.

[0040] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0041] 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 proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only 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 known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0042] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of 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.

[0043] The applicant found that when the blade main beam of the wind turbine is made in the form of a pultruded plate, a fabric structure will be set between the layers of the pultruded plate, and a part of the fabric structure will be made of conductive material and have a certain conductivity. However, the fabric structure has the problem of insufficient conductivity. For example, along the width direction, the blade main beam has a certain curvature, and there will be gaps between the pultruded plates. Generally, resin is used to fill the gaps to fix the pultruded plates. When the blade is struck by lightning, the carbon fiber material will conduct the lightning current, and the lightning current will be conducted along the length, width and thickness of the blade. For the lightning current conducted along the width direction of the blade, when the lightning current is conducted to the gap between the pultruded plates, the resin material filled in the gap is usually poor in conductivity. There is a significant difference in the conductivity of the blade in the gap between the pultruded plates. The gap between the pultruded plates may be broken down by the lightning current, forming a carbonized gap, which reduces the structural strength of the blade.

[0044] In view of the above problems, the applicant proposes a fabric structure, a blade main beam, a blade and a wind turbine generator set. A plurality of first conductive parts extending in a first direction and a plurality of second conductive parts extending in a second direction are intersected in a mesh shape, so that the fabric structure can conduct electricity in the first direction and the second direction. When a circuit is broken at the connection between one or several first conductive parts and the second conductive parts, the other connections can still enable the fabric structure to conduct electricity in the first direction and the second direction. When the lightning current is conducted in the blade main beam, at the connection between the two plate bodies along the second direction, the second conductive part can conduct the lightning current in the second direction, thereby reducing the risk of the lightning current breaking through the connection between the two plate bodies, and further reducing the impact of lightning strikes on the structural strength of the blade main beam.

[0045] Figure 1 A structural schematic diagram of the fabric structure of an embodiment of the present application. Figure 2 This is a schematic diagram of the structure of the fabric structure after being damaged according to an embodiment of the present application. Figure 3 Another schematic diagram of the structure of the fabric structure after being damaged according to an embodiment of the present application.

[0046] See also Figures 1 to 3The embodiment of the present application provides a fabric structure 2, comprising: a plurality of first conductive parts 23 extending along a first direction X, the plurality of first conductive parts 23 are arranged along a second direction Y, and the first direction X and the second direction Y intersect; a plurality of second conductive parts 21 extending along the second direction Y, the plurality of second conductive parts 21 are arranged along the first direction X; the plurality of first conductive parts 23 are in contact with the plurality of second conductive parts 21, and the conductivity of the first conductive parts 23 is less than the conductivity of the second conductive parts 21.

[0047] When the fabric structure of the embodiment of the present application is used to make a wind turbine blade, the first direction X can be parallel to the length direction of the blade, equivalent to the radial direction of the blade, and the second direction Y can be parallel to the width direction of the blade, equivalent to the weft direction of the blade.

[0048] Continue reading Figure 1 , the conductivity of the first conductive part 23 is less than the conductivity of the second conductive part 21, the first conductive part 23 can be made of carbon fiber material, and the second conductive part 21 can be made of metal material. Multiple first conductive parts 23 extend along the first direction X, which can provide tensile stress along the length direction for the wind turbine blades, thereby improving the structural strength of the wind turbine blades along the length direction. Considering that the tensile stress requirement of the wind turbine blades in the width direction is lower than that in the length direction, and connecting resin is provided between the blade plates, the second conductive part 21 with greater conductivity can make the blades using the fabric structure of the embodiment of the present application have basically the same resistance in the width and length directions, and have good conductivity in both the first direction X and the second direction Y, thereby reducing the risk of the wind turbine blades being struck by lightning. Continue reading Figure 2 and Figure 3 , the first conductive part 23 and the second conductive part 21 are in a mesh shape, and at the intersection, the first conductive part 23 and the second conductive part 21 are in contact and connected to achieve electrical connection between the two. When the fabric structure 2 of the embodiment of the present application is subjected to external force, if the connection between a first conductive part 23 and a second conductive part 21 is disconnected, or a first conductive part 23 or a second conductive part 21 is broken, the mesh structure formed by the first conductive part 23 and the second conductive part 21 can still conduct electricity from other undamaged parts, so that the fabric structure of the embodiment of the present application can still have good electrical conductivity to reduce the risk of lightning breakdown.

[0049] In addition, the fabric structure of the embodiment of the present application can also be energized to generate heat for the first conductive part 23 and the second conductive part 21 to melt the frost condensed on the blade surface. Since the deicing device using the fabric structure of the embodiment of the present application has substantially the same conductivity along the first direction X and along the second direction Y, the fabric structure of the embodiment of the present application can generate heat uniformly within the entire deicing range after being energized, thereby having a good deicing effect while reducing the possibility of local overheating.

[0050] Figure 4 Another structural schematic diagram of the fabric structure 2 according to an embodiment of the present application.

[0051] For further information, see Figure 4 The fabric structure 2 further includes a third conductive portion 22 extending along the second direction Y. Two adjacent second conductive portions 21 are provided with at least one third conductive portion 22 , and the conductivity of the third conductive portion 22 is less than that of the second conductive portion 21 .

[0052] Considering that the second conductive part 21 may be made of metal material, the second conductive part 21 may affect the structural strength of the fabric structure 2 along the second direction Y. In the embodiment of the present application, the fabric structure 2 is also provided with a third conductive part 22 extending along the second direction Y to improve the structural strength of the fabric structure 2. Exemplarily, the third conductive part 22 may be made of carbon fiber material, and its conductivity is better than that of the second conductive part 21. When the second conductive part 21 is in the form of a filament, at least one third conductive part 22 is provided between two adjacent second conductive parts 21 along the first direction X, so that the fabric structure 2 has both good structural strength and good conductivity.

[0053] Figure 5 Another structural schematic diagram of the fabric structure of an embodiment of the present application.

[0054] For further information, see Figure 5 The fabric structure 2 further includes a first electrode 24 , which extends along the second direction Y. The first electrode 24 and the second conductive portion 21 are arranged along the first direction X. The first electrode 24 is electrically connected to the first conductive portion 23 .

[0055] The first electrode 24 can be connected to a power source to supply power to the first conductive portion 23 and the second conductive portion 21 of the fabric structure 2. When ice forms on the blades of the wind turbine generator, the power is transferred to the first conductive portion 23 via the first electrode 24, and further transferred to the second conductive portion 21, so that the second conductive portion 21 can generate heat to heat the blades of the wind turbine generator and remove frost on the surface of the blades. In addition, the plurality of second conductive portions 21 can be arranged equidistantly along the first direction X, so that the entire blade surface can be evenly heated. Figure 6 A schematic diagram of the structure of the blade main beam of an embodiment of the present application. Figure 7 This is a cross-sectional view of the blade main beam of an embodiment of the present application perpendicular to the first direction section.

[0056] See also Figure 6 and Figure 7The embodiment of the present application also provides a blade main beam, including: a layer structure 1, wherein the multiple layer structures 1 are stacked along a third direction Z; each layer structure 1 includes a plurality of plate bodies 11, each plate body 11 extends along a first direction X, and the plurality of plate bodies 11 located in the same layer structure 1 are arranged along a second direction Y, and the first direction X, the second direction Y and the third direction Z intersect with each other; the fabric structure 2 in the aforementioned embodiment of the present application, wherein the fabric structure 2 is arranged between at least two adjacent layer structures 1 along the third direction Z, and the second conductive portion 21 is bridged across at least two adjacent plate bodies 11 along the second direction.

[0057] In the embodiment of the present application, the blade main beam is made by means of pultruded plate. The blade main beam of the embodiment of the present application can be formed by stacking multiple layer structures 1 along a third direction Z, wherein the third direction Z corresponds to the thickness direction of the blade main beam. The layer structure 1 can enable the blade main beam to have a certain structural strength. The layer structure 1 can be formed by splicing multiple plate bodies 11, and the plate body 11 can be a plate of a pultruded plate. Multiple plate bodies 11 extend along a first direction X, are arranged along a second direction Y, and are spliced ​​to form a layer structure 1. The first direction X corresponds to the length direction of the blade main beam, and the second direction Y corresponds to the width direction of the blade main beam. The width direction of the plate body 11 is parallel to the width direction of the blade main beam, so that the width direction of the blade main beam can form a certain curvature, so that the shape of the blade can meet the needs of aerodynamics.

[0058] A fabric structure 2 is provided between two adjacent layer structures 1, and the fabric structure 2 can improve the connection strength between the layer structures 1, so that the blade main beam has good structural strength. The second conductive portion 21 in the storage layer extends along the second direction Y, and is used to conduct the lightning current generated by the lightning strike along the second direction Y. The orthographic projection of the second conductive portion 21 in the third direction Z overlaps with the orthographic projection of at least two plate bodies 11, that is, the second conductive portion 21 will pass through the connection between the two plate bodies 11 along the second direction Y. When the lightning current is conducted along the second direction Y to the connection between the two plate bodies 11 along the second direction Y, the lightning current can be conducted directly through the second conductive portion 21, thereby reducing the risk of the connection between the two plate bodies 11 along the second direction Y being broken down by the lightning current, thereby reducing the impact of the lightning strike on the structural strength of the blade main beam.

[0059] Exemplarily, the plate body 11 may be made of carbon fiber material, and since the plate body 11 extends along the first direction X, the plate body 11 may conduct lightning current along the first direction X. In order to reduce the difference in the conductivity of the blade at the gap between the pultruded plates, the conductivity of the second conductive portion 21 may be close to the conductivity of the plate body 11 .

[0060] Further, see Figure 7In the layer structure 1 , a bonding portion 12 is provided between two adjacent plate bodies 11 , and along the third direction Z, an orthographic projection of the bonding portion 12 at least partially overlaps with an orthographic projection of the second conductive portion 21 .

[0061] Considering that the blade main beam has a certain curvature along the second direction Y, there is a gap between two adjacent plate bodies 11 located in the same layer structure 1, and the bonding part 12 is filled in the gap to fix the two adjacent plate bodies 11. Exemplarily, the bonding part 12 can be made of a resin material with poor conductivity. Along the third direction Z, the orthographic projection of the bonding part 12 overlaps at least partially with the orthographic projection of the second conductive part 21, and the second conductive part 21 will cross the position of the bonding part 12. When the lightning current is transmitted to the bonding part 12, it can continue to be transmitted along the second direction Y through the second conductive part 21, thereby reducing the risk of lightning current breaking through the bonding part 12 and causing the bonding part 12 to fail.

[0062] Figure 8 It is a schematic diagram of an orthographic projection of the plate body and the second conductive part of the blade main beam of an embodiment of the present application perpendicular to the third direction. Fig. 9 This is another schematic diagram of the orthographic projection of the plate body and the second conductive part of the blade main beam of an embodiment of the present application perpendicular to the third direction. Fig.10 This is another schematic diagram of the orthographic projection of the plate body and the second conductive part of the blade main beam of an embodiment of the present application perpendicular to the third direction.

[0063] For further information, see Figures 8 to 10 The second conductive part 21 includes at least one of a metal wire, a metal plate and a metal mesh, and the first conductive part 23 includes a carbon fiber wire.

[0064] The second conductive part 21 may adopt a filament structure with a circular or elliptical cross-sectional shape. For example, the second conductive part 21 may be a metal wire, such as a copper wire. The second conductive part 21 may be a plurality of filament structures arranged along the first direction X. Along the first direction X, the lightning current may be uniformly conducted, reducing the risk of local concentration of lightning current exceeding the carrying capacity of a single second conductive part 21. In the embodiment of the present application, the second conductive part 21 may also adopt a mesh form. For example, the second conductive part 21 may be a metal mesh. The second conductive part 21 may also adopt a strip form. For example, the second conductive part 21 may be a metal strip. Whether the second conductive part 21 adopts a mesh form or a strip form, it has a certain width along the first direction X. In addition to being able to conduct lightning current along the second direction Y, the second conductive part 21 can also conduct lightning current along the first direction X, thereby improving the conductivity of the second conductive part 21.

[0065] Fig.11 This is a cross-sectional view of the blade main beam of an embodiment of the present application perpendicular to the second direction section.

[0066] For further information, see Fig.11 , and combined with Figure 8 Along the third direction Z, the thickness of the fabric structure 2 is D1, and the diameter of the circumscribed circle of the cross-sectional shape of the second conductive portion 21 is D2, wherein 0.8≤D2 / D1≤1.

[0067] When the second conductive part 21 adopts a filament structure, the diameter of the circumscribed circle of the second conductive part 21 should not be less than 80% of the thickness of the fabric structure 2, so as to reduce the internal resistance of the second conductive part 21, so that the second conductive part 21 has good conductivity, and reduce the risk of the second conductive part 21 being broken down by lightning current. Exemplarily, when the cross-sectional shape of the second conductive part 21 is circular, the circular diameter is equal to the diameter of the circumscribed circle of the cross-sectional shape of the second conductive part 21; when the cross-sectional shape of the second conductive part 21 is elliptical, the major axis of the ellipse is equal to the diameter of the circumscribed circle of the cross-sectional shape of the second conductive part 21. When the second conductive part 21 is a copper wire, the plate body 11 can be a 5mm thick carbon fiber plate body 11, the thickness D1 of the fabric structure 2 is 0.2mm, and the diameter D2 of the second conductive part 21 is 0.2mm. At this time, the conductivity of the copper wire second conductive part 21 is equal to the conductivity of the carbon fiber plate body 11.

[0068] It should be noted that when the second conductive part 21 adopts a filament structure, the cross-sectional shape of the second conductive part 21 may also be a polygon, such as a triangle or a rectangle. The diameter of the circumscribed circle of the polygon is D2, wherein 0.8≤D2 / D1≤1.

[0069] Further, see Fig.11 , and combined with Figure 8 Along the third direction Z, the thickness of the plate body 11 is D3, and along the first direction X, the axial distance between two adjacent second conductive parts 21 is D4, wherein 1.8≤D4 / D3≤2.2.

[0070] Considering that the second conductive part 21 is in the form of multiple filamentary structures, when the distance between the two second conductive parts 21 along the first direction X is too large, the distribution of the lightning current in the first direction X may be uneven, and the bonding part 12 may still be broken down; when the distance between the two second conductive parts 21 along the first direction X is too small, the risk of lightning current breaking down between the two adjacent second conductive parts 21 is increased. Therefore, in the embodiment of the present application, the ratio of the axis distance D4 of the two adjacent second conductive parts 21 to the thickness D3 of the plate body 11 is 1.8 to 2.2, so that the blade main beam can have good conductivity. Exemplarily, the axis distance D4 of the two adjacent second conductive parts 21 can be twice the thickness D3 of the plate body 11. When the second conductive part 21 is a copper wire, the plate body 11 can be a 5 mm thick carbon fiber plate body 11, the diameter D2 of the second conductive part 21 is 0.2 mm, and the axial distance between two adjacent second conductive parts 21 is D4 = 10 mm. At this time, along the second direction Y, the ratio of the resistance of the carbon fiber plate body 11 to the resistance of the second conductive part 21 at the connection between the two plate bodies 11 is approximately 16:17. At the connection between the two plate bodies 11, the lightning current can be smoothly conducted from the second conductive part 21.

[0071] Fig.12 This is another cross-sectional view of the blade main beam of an embodiment of the present application perpendicular to the second direction section.

[0072] For further information, see Fig.12 , and combined with Fig. 9 and Fig.10 , the second conductive portion 21 includes a metal plate and / or a metal mesh; the thickness of the plate body 11 is D3, and the width of the second conductive portion 21 along the first direction X is D5, wherein 0.6≤D5 / D3≤2.

[0073] When the second conductive part 21 is in the form of a mesh or a strip, if the width of the second conductive part 21 along the first direction X is too large, and the second conductive part 21 is usually made of metal material, then the second conductive part 21 will greatly increase the weight of the blade main beam; if the width of the second conductive part 21 along the first direction X is too small, then the resistance of the second conductive part 21 will increase, the conductivity will be weakened, and it will be easily broken down by lightning current. In the embodiment of the present application, the ratio of the width D5 of the second conductive part 21 along the first direction X to the thickness D3 of the plate body 11 is 0.6 to 2, so that the second conductive part 21 will not significantly increase the weight of the blade main beam, and can also have good conductivity. Exemplarily, when the thickness of the plate body 11 is 5mm, the width of the second conductive part 21 along the first direction X can be 3-10mm.

[0074] Fig.13 This is a cross-sectional view of the blade of an embodiment of the present application perpendicular to the first direction.

[0075] See also Fig.13 The embodiment of the present application further provides a blade 3, which includes the blade main beam 31 of the aforementioned embodiment of the present application or the fabric structure of the aforementioned embodiment of the present application. The length direction of the blade 3 of the embodiment of the present application is parallel to the first direction X, and the width direction of the blade 3 is parallel to the second direction Y. When the blade 3 of the embodiment of the present application is struck by lightning, the generated lightning current can be conducted through the fabric structure. In the second direction Y, the lightning current will be conducted through the second conductive part 21, thereby reducing the risk of breakdown caused by the concentration of lightning current somewhere in the second direction Y, and reducing the impact of lightning strikes on the structural strength of the blade 3.

[0076] Fig.14 A schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present application.

[0077] See also Fig.14 The embodiment of the present application also provides a wind turbine generator set, including: a nacelle 4; a generator 5, which is arranged in the nacelle 4, and the generator 5 includes a rotor and a stator that are rotatably matched; a hub 6, which is connected to the rotor to drive the rotor to rotate relative to the stator; a blade 3, which is the blade 3 of the aforementioned embodiment of the present application, and the blade 3 is connected to the hub 6 at one end in the first direction X. The blade 3 rotates under the action of wind force, driving the hub 6 to move and rotate; the hub 6 rotates, driving the rotor of the generator 5 to rotate relative to the stator, thereby realizing wind power generation. When the blade 3 is struck by lightning, the generated lightning current can be conducted along the second direction Y through the second conductive part 21, thereby reducing the risk of breakdown of the lightning current along the second direction Y, and reducing the impact of lightning strikes on the structural strength of the wind turbine generator set.

[0078] In summary, the embodiments of the present application provide a fabric structure, a blade main beam, a blade and a wind turbine generator set. In the fabric structure, a plurality of first conductive parts extending along the first direction and a plurality of second conductive parts extending along the second direction are crossed in a mesh shape, so that the fabric structure can conduct electricity along the first direction and the second direction. When a short circuit occurs at the connection between one or several first conductive parts and the second conductive parts, the other connections can still enable the fabric structure to conduct electricity along the first direction and the second direction. When the lightning current is conducted in the blade main beam, the fabric structure can conduct the lightning current along the fabric structure, reducing the impact of the lightning strike on the structural strength of the blade main beam. When the blade surface is frozen, the fabric structure can introduce current and generate heat along the first direction and the second direction, so that the entire blade surface can be heated.

[0079] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned 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 includes all technical solutions falling within the scope of the claims.

Claims

1. A fabric structure, characterized in that: include: A plurality of first conductive parts (23) extending along a first direction, wherein the plurality of first conductive parts (23) are arranged along a second direction, and the first direction and the second direction intersect; A plurality of second conductive parts (21) extending along the second direction, the plurality of second conductive parts (21) being arranged along the first direction; a plurality of first conductive parts (23) and a plurality of second conductive parts (21) being in contact and connected, the conductivity of the first conductive parts (23) being smaller than the conductivity of the second conductive parts (21).

2. The fabric structure according to claim 1, characterized in that: The second conductive part (21) comprises at least one of a metal wire, a metal plate and a metal mesh, and the first conductive part comprises a carbon fiber wire.

3. The fabric structure according to claim 1, characterized in that: The thickness of the fabric structure is D1, and the diameter of the circumscribed circle of the cross-sectional shape of the second conductive portion (21) is D2, wherein 0.8≤D2 / D1≤1.

4. The fabric structure according to claim 1, characterized in that The fabric structure further comprises a third conductive portion (22), the third conductive portion (22) extending along the second direction, two adjacent second conductive portions (21) being provided with at least one third conductive portion (22), and the conductivity of the third conductive portion (22) being less than the conductivity of the second conductive portion (21).

5. The fabric structure according to claim 1, characterized in that: The fabric structure further comprises a first electrode (24), the first electrode (24) extending along the second direction, the first electrode (24) and the second conductive part (21) arranged along the first direction, and the first electrode (24) being electrically connected to the first conductive part (23).

6. A blade main beam, characterized in that: include: A layer structure (1), wherein multiple layers of the layer structure (1) are stacked along a third direction; each layer of the layer structure (1) comprises a plurality of plate bodies (11), each of the plate bodies (11) extends along the first direction, and the plurality of plate bodies (11) located in the same layer structure (1) are arranged along the second direction, and the first direction, the second direction and the third direction intersect with each other; The fabric structure (2) described in any one of claims 1 to 5 is arranged between two adjacent layer structures (1) along the third direction, and the second conductive portion (21) is bridged across at least two adjacent plate bodies (11) along the second direction.

7. The blade main beam according to claim 6, characterized in that: In the layer structure (1), a bonding portion (12) is provided between two adjacent plate bodies (11), and along the third direction, an orthographic projection of the bonding portion (12) at least partially overlaps with an orthographic projection of the second conductive portion (21).

8. The blade main beam according to claim 6, characterized in that: The second conductive part (21) comprises a metal wire. Along the third direction, the thickness of the plate body (11) is D3. Along the first direction, the axial distance between two adjacent second conductive parts (21) is D4, wherein 1.8≤D4 / D3≤2.

2.

9. The blade main beam according to claim 6, characterized in that: The second conductive part (21) comprises a metal plate and / or a metal mesh; the thickness of the plate body (11) is D3, and the width of the second conductive part (21) along the first direction is D5, wherein 0.6≤D5 / D3≤2.

10. A blade, characterized in that: The invention comprises the fabric structure described in any one of claims 1 to 5.

11. A blade, characterized in that: It comprises the blade main beam (31) as described in any one of claims 6 to 9, wherein the length direction of the blade (3) is parallel to the first direction; and the width direction of the blade (3) is parallel to the second direction.

12. A wind turbine generator set, characterized in that: include: Engine room (4); A generator (5) is arranged in the nacelle (4), and the generator (5) comprises a rotor and a stator which are rotatably matched; A wheel hub (6) connected to the rotor to drive the rotor to rotate relative to the stator; The blade (3) is the blade (3) described in claims 10-11, and one end of the blade (3) in the first direction is connected to the hub (6).

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