Wind turbine blade assembly and wind power generation equipment

Abstract

This invention belongs to the technical field of wind power generation equipment, specifically relating to a wind turbine blade assembly and a wind power generation device. The wind turbine blade assembly includes: a blade body, with a blade root connecting portion at one end; and a blade root assembly, comprising multiple blade root segments, which are arranged circumferentially around the blade body to form a rotating body, with each blade root segment detachably connected to a corresponding part on the blade root connecting portion. Through the technical solution of this invention, the structure and assembly method of the blade root assembly are improved. The use of a segmented blade root assembly significantly reduces the size of individual blade root segments, effectively reducing difficulties in manufacturing and transportation. Simultaneously, the overall size of the blade root assembly can be further increased to accommodate larger blade bodies, which is beneficial for further improving the swept area and power generation of the wind power generation equipment. Furthermore, by replacing different blade root assemblies, it can adapt to different size requirements in various application scenarios.

Description

Technical Field

[0001] This invention belongs to the technical field of wind power generation equipment, specifically relating to wind power generation blade devices and wind power generation equipment. Background Technology

[0002] In wind power generation equipment, blades are typically connected to the hub of the main unit via the blade root. Traditional blade assemblies are usually integrally cast from the blade section and the blade root section. However, with the increase in power generation capacity and blade swept area, the blade length has further increased, and the size of the blade root section has also increased, which has increased the difficulty of manufacturing. Moreover, since blade assemblies are currently mainly transported by land vehicles, the large size of the blade assemblies has also caused considerable difficulties in transportation operations. In particular, the blade root section is the part with the largest radial dimension in the overall structure, and it faces restrictions on height and width during transportation.

[0003] Some existing blade systems employ a separate manufacturing approach, where the blade and blade root are processed separately during manufacturing and transportation. While this approach can reduce the length to some extent, manufacturing and transportation difficulties related to height and width still exist, hindering the further development and advancement of wind power equipment. Summary of the Invention

[0004] In view of this, in order to improve the manufacturing and transportation difficulties caused by the increased size of the blade assembly in the prior art, the present invention provides a wind power generation blade assembly and a wind power generation device.

[0005] The first aspect of the present invention provides a wind power generation blade device, comprising: a blade body, one end of which is provided with a blade root connection portion; a blade root assembly, including a plurality of blade root segments, the plurality of blade root segments surrounding the blade body in the circumferential direction to form a rotating body, and each blade root segment being detachably connected to a corresponding part on the blade root connection portion.

[0006] The beneficial effects of the above-mentioned technical solution of the present invention are reflected in:

[0007] The structure and assembly method of the blade root assembly have been improved. The blade root assembly is decomposed into multiple blade root segments, which are then reassembled into a whole blade root assembly during assembly. This significantly reduces the size of individual blade root segments, thereby effectively reducing difficulties in the manufacturing and transportation processes and avoiding restrictions such as height and width limitations during transportation. This allows the overall size of the blade root assembly to be further increased to accommodate larger blade bodies, which is beneficial to further improving the swept area and power generation of wind power generation equipment.

[0008] Furthermore, due to the separate design between the blade root assembly and the blade body, as well as the segmented design of the blade root assembly itself, for blade bodies and hubs of different sizes and specifications, the connection can be achieved by replacing the blade root assembly of the corresponding size, so as to match the axial length of the blade body and the size of the hub connection pitch circle, forming a standardized assembly combination of the blade body and the alternative blade root assembly, making the wind power generation blade device more adaptable and more flexible in assembly.

[0009] In one feasible implementation, the cross-section of each blade root segment is an arc-shaped structure, and on the axial direction of the blade root assembly, one end is provided with a first connecting structure adapted to the blade root connection part, and the other end is provided with a second connecting structure adapted to the hub of the wind power generation equipment.

[0010] In one feasible implementation, the diameter of the end of the blade root assembly used to connect to the hub is equal to the diameter of the end used to connect to the blade body.

[0011] In one feasible implementation, the leaf root assembly is an axially continuous cylindrical structure.

[0012] In one feasible implementation, the diameter of the end of the blade root assembly used to connect to the hub is greater than or less than the diameter of the end connected to the blade body.

[0013] In one feasible implementation, the leaf root assembly is an axially continuous frustum-shaped structure.

[0014] In one feasible implementation, multiple leaf root segments are all structures of the same size.

[0015] In one feasible implementation, the end face of the blade root connector is provided with multiple connecting bolt holes, which are spaced apart in the circumferential direction; the first connecting structure includes multiple first bolt holes and multiple first double-ended studs, which are spaced apart in the circumferential direction and are opposite to the connecting bolt holes, one end of each first double-ended stud is threaded to a connecting bolt hole, and the other end is threaded to a corresponding first bolt hole; the second connecting structure includes multiple second bolt holes and multiple second double-ended studs, which are spaced apart in the circumferential direction, one end of each second double-ended stud is threaded to a second bolt hole, and the other end is threaded to a corresponding connecting hole on the hub.

[0016] In one feasible implementation, the leaf root segments are steel structures, and both the first and second bolt holes are formed by direct drilling; or

[0017] The blade root segment is made of fiberglass. Each end of the blade root segment has a pre-embedded bolt sleeve structure. The bolt sleeve structure at one end of the blade root segment has a first bolt hole, and the bolt sleeve structure at the other end of the blade root segment has a second bolt hole.

[0018] In one feasible implementation, the wind turbine blade assembly further includes: a first flange ring disposed between the blade root assembly and the blade body, the first flange ring having a plurality of first through holes extending axially and spaced apart in the circumferential direction, and a first double-ended stud passing through the first through holes and connected to the blade root assembly and the blade body; and / or a second flange ring disposed between the blade root assembly and the hub, the second flange ring having a plurality of second through holes extending axially and spaced apart in the circumferential direction, and a second double-ended stud passing through the second through holes and connected to the blade root assembly and the hub.

[0019] In one feasible implementation, the blade root assembly further includes: a surface structure comprising a flexible cover and a fixing layer, the flexible cover being disposed along the circumferential direction of the blade root assembly and covering the outer surfaces of a plurality of blade root segments, and the fixing layer being formed by infusion of an infusion material and covering the outer surfaces of the flexible cover and the blade root segments.

[0020] In one feasible implementation, in the circumferential direction of the leaf root component, a third connection structure is provided at the junction of two adjacent leaf root segments, and the two adjacent leaf root segments are connected to each other through the corresponding third connection structure.

[0021] In one feasible implementation, the third connection structure includes: a slot structure located at the side edge of a blade root segment in the circumferential direction; and a hook structure located on another adjacent blade root segment in the circumferential direction opposite to the slot structure, wherein the hook structure engages with the slot structure.

[0022] A second aspect of the present invention also provides a wind power generation device, comprising: a support tower; a main body including a power generation device and a hub, disposed on the support tower, the hub being throttle-connected to the input end of the power generation device; and at least one wind power generation blade device according to any one of the first aspects, connected to the hub. Attached Figure Description

[0023] Figure 1 The diagram shown is an exploded view of a partial structure of a wind turbine blade device according to an embodiment of the present invention.

[0024] Figure 2 The diagram shown is a schematic diagram of a wind turbine blade device according to an embodiment of the present invention.

[0025] Figure 3 The diagram shown is an axially exploded view of the blade root assembly of a wind power generation blade device according to an embodiment of the present invention.

[0026] Figure 4 The diagram shown is an exploded view of a partial structure of a wind turbine blade device according to an embodiment of the present invention.

[0027] Figure 5 The diagram shown is an exploded view of another wind power blade device provided in one embodiment of the present invention.

[0028] Figure 6 The diagram shown is an exploded view of another wind power generation blade device provided in an embodiment of the present invention.

[0029] Figure 7 The figure shown is an axial schematic diagram of the blade root assembly and blade body of a wind power generation blade device according to an embodiment of the present invention.

[0030] Figure 8 The diagram shown is a schematic diagram of the blade root assembly of a wind power generation blade device according to an embodiment of the present invention.

[0031] Figure 9 The diagram shown is an exploded view of a partial structure of a wind turbine blade device according to an embodiment of the present invention.

[0032] Figure 10 The diagram shown is an axial schematic of the first flange ring of a wind turbine blade assembly according to an embodiment of the present invention.

[0033] Figure 11 The figure shown is an axial schematic diagram of the blade root assembly of a wind power generation blade device according to an embodiment of the present invention.

[0034] Figure 12 The diagram shown is a schematic diagram of the third connection structure of a wind power generation blade device according to an embodiment of the present invention.

[0035] Figure 13 The diagram shown is a schematic diagram of a wind power generation device provided in one embodiment of the present invention. Detailed Implementation

[0036] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0037] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] The following provides some embodiments of the wind power generation blade device and wind power generation equipment in the technical solution of the present invention.

[0040] In an embodiment of a first aspect of the present invention, a wind turbine blade device 1 is provided. For example... Figure 1 and Figure 2 As shown, the wind turbine blade assembly 1 includes a blade body 11 and a blade root assembly 12.

[0041] like Figure 1 and Figure 2 As shown, one end of the blade body 11 is provided with a blade root connection part 111. The blade root assembly 12 is detachably connected to the blade root connection part 111 of the blade body 11 to realize the assembly between the blade root assembly 12 and the blade body 11. Then, the blade body 11 is connected and fixed to the hub of the wind power generation equipment through the blade root assembly 12. Under the action of wind, the blade body 11 drives the blade root assembly 12 and the hub to rotate, providing power for the wind power generation equipment.

[0042] The blade root assembly 12 includes multiple split blade root segments 121. When connected to the blade body 11, the multiple blade root segments 121 are arranged sequentially along the circumferential direction of the blade body 11 and surround to form a rotating blade root assembly 12, so as to facilitate connection with the blade body 11 and the hub of the wind power generation equipment.

[0043] It is understandable that the power generation capacity and swept area of ​​a wind turbine are related to the length of the blade body 11. The longer the blade body 11 is, the larger the swept area, and correspondingly, the higher the power generation capacity of the wind turbine. However, the longer the blade body 11 is, the greater its weight, and the greater the load on the blade root assembly 12. In order to meet the stress requirements, the overall size of the blade root assembly 12 needs to be increased accordingly.

[0044] In this embodiment, the structure and assembly method of the blade root assembly 12 of the wind turbine blade device 1 have been optimized and improved. The blade root assembly 12 is composed of multiple blade root segments 121 spliced ​​together, which greatly reduces the size of a single blade root segment 121. The manufacturing and transportation operations can be carried out separately, and the assembly is carried out when it is assembled with the hub of the wind turbine. This effectively reduces the difficulties in the manufacturing and transportation links. At the same time, the overall size of the blade root assembly 12 can be further increased to accommodate a larger blade body 11, which is conducive to further improving the swept area and power generation of the wind turbine blade.

[0045] Furthermore, due to the separate design between the blade root assembly 12 and the blade body 11, as well as the segmented design of the blade root assembly 12 itself, when blade bodies 11 of different sizes and specifications are assembled with the hub, only the appropriate blade root assembly 12 needs to be selected to achieve connection and installation. For blade bodies 11 and hubs 222 of different sizes and specifications, the connection can be achieved by replacing the blade root assembly 12 of the corresponding size to match the axial length of the blade body 11 and the size of the connection pitch circle of the hub 222, making the wind power generation blade device 1 more adaptable and more flexible in assembly.

[0046] It should be noted that the number of leaf root segments 121 in this embodiment can be as follows: Figure 1 The three shown in the figure can also be two or more other quantities, as long as the leaf root assembly 12, which is called a rotating body structure, can be spliced ​​together in the circumferential direction. The situation in the following embodiments is the same as this embodiment.

[0047] In some embodiments of the present invention, such as Figures 1 to 3 As shown, in the wind turbine blade assembly 1, each blade root segment 121 of the blade root assembly 12 has an arc-shaped cross-section, making the overall cross-section of the blade root assembly 12 a ring structure formed by splicing multiple arc segments, which facilitates installation and fixation with the blade body 11 and the hub of the wind turbine. It can be understood that the blade mounting positions on the hub of common wind turbines typically adopt a circular structure, such as a circular mounting flange structure. Correspondingly, the end face of the blade body 11 near the blade root is also typically a circular structure, so that the stress after connection is relatively uniform.

[0048] In the axial direction of the blade root assembly 12, each blade root segment 121 has a connecting structure at both ends; a first connecting structure 1211 is provided at the end of the blade root segment 121 near the blade body 11, and the first connecting structure 1211 is adapted to the blade root connecting part 111 of the blade body 11 for connection; a second connecting structure 1215 is provided at the end of the blade root segment 121 away from the blade body 11, and the second connecting structure 1215 is adapted to the hub of the wind power generation equipment for connection and assembly with the hub.

[0049] In some embodiments of the present invention, such as Figures 1 to 4 As shown, in one implementation of the wind turbine blade assembly 1, the diameters of the two ends of the blade root assembly 12 in the axial direction are equal. That is, the diameter of the end of the blade root assembly 12 used to connect to the hub is equal to the diameter of the end of the blade root assembly 12 used to connect to the blade body 11, so as to adapt to the case where the diameters of the blade root connection portion 111 of the blade body 11 and the mounting position on the hub of the wind turbine are equal.

[0050] Furthermore, such as Figure 4 As shown, the blade root assembly 12 is specifically a hollow cylindrical structure, and the cylindrical structure is axially continuous. It can be understood that the cylindrical structure is relatively simple, and the corresponding blade root segments 121 have the same curvature at any position in the axial direction. The structure of a single blade root segment 121 is simple, easy to process and manufacture, and the stress is relatively uniform.

[0051] It should be noted that the cylindrical structure is only one of the preferred implementations of the blade root assembly 12 of the present invention. The blade root assembly 12 can also adopt other rotating body structures, such as a structure in which the diameter of the middle part in the axial direction is greater than the diameter of both ends, as long as it can be adapted to the mounting position of the hub and the blade root connection part 111 of the blade body 11. It will not be elaborated here.

[0052] In some embodiments of the present invention, such as Figure 5 As shown, the diameters of the two ends of the blade root assembly 12 in the axial direction are different. Specifically, in one particular implementation, the diameter of the end of the blade root assembly 12 used to connect to the hub is larger than the diameter of the end connected to the blade body 11, thus adapting to situations where the diameter of the mounting position on the hub of the wind turbine is larger than the diameter of the blade root connection portion 111 of the blade body 11. It can be understood that as the length of the blade body 11 increases, its own weight also increases, and the load borne by the hub after installation also increases further. In order to meet the stress requirements, the diameter of the mounting position on the hub and the overall size of the hub also need to be increased. In some cases, the diameter of the mounting position on the hub is larger than the diameter of the blade connection portion of the blade body 11. The above-described form of the blade root assembly 12 can better adapt to the hub and blade body 11 in such cases.

[0053] Furthermore, such as Figure 5 As shown, the blade root assembly 12 has a truncated cone structure. The truncated cone structure is axially continuous, and the larger diameter end of the truncated cone structure is used to connect with the hub of the wind power generation equipment, while the smaller diameter end is connected with the blade root connection part 111 of the blade body 11. It can be understood that the truncated cone structure is a regular structure, and the structure of each blade root segment 121 is relatively simple, which is easy to process and manufacture, and the stress is relatively uniform.

[0054] In another specific implementation, such as Figure 6 As shown, the diameter of the end of the blade root assembly 12 used to connect to the hub is smaller than the diameter of the end connected to the blade body 11, thus adapting to situations where the diameter of the mounting position on the hub of the wind power generator is smaller than the diameter of the blade root connection portion 111 of the blade body 11. It can be understood that in practical applications, when the connection strength meets the requirements, the diameter of the mounting position on the hub can also be smaller than the diameter of the blade connection portion of the blade body 11; the above-described form of the blade root assembly 12 can better adapt to hubs and blade bodies 11 in such cases.

[0055] Furthermore, such as Figure 6 As shown, the blade root assembly 12 is specifically a truncated cone structure. The truncated cone structure is axially continuous, and the smaller diameter end of the truncated cone structure is used to connect with the hub of the wind power generation equipment, while the larger diameter end is connected with the blade root connection part 111 of the blade body 11. The truncated cone structure is a regular structure, and the structure of each blade root segment 121 is relatively simple, facilitating manufacturing and ensuring relatively uniform stress distribution. Furthermore, it allows for a reduction in the pitch circle size of the mounting position on the hub, simplifying installation and maintenance.

[0056] It should be noted that the truncated cone structure is one of the preferred implementations of the blade root assembly 12 of the present invention. In practical applications, the blade root assembly 12 can also adopt other shapes of rotating body structures, such as rotating bodies with stepped structures, or rotating bodies that combine cylindrical and conical structures, as long as they can be adapted to the size of the mounting position on the hub and the blade root connection part 111 of the blade body 11. Further details will not be elaborated here.

[0057] Furthermore, such as Figure 1 and Figure 3As shown in the example above, the multiple blade root segments 121 that make up the blade root assembly 12 are all of the same size, that is, the axial dimension of each blade root segment 121 is the same, and the arc dimension corresponding to each blade root segment 121 on the same cross-section is also the same. In this case, the multiple blade root segments 121 that make up the blade root assembly 12 are components of the same specification, and only one type of component needs to be processed in the production process. This simplifies the production process and improves the versatility of the blade root segments 121. Any two blade root segments 121 can be interchanged, which helps to further reduce costs.

[0058] In some embodiments of the present invention, such as Figure 7 and Figure 8 As shown, in the wind turbine blade assembly 1, the end face of the blade root connection portion 111 of the blade body 11 is provided with a plurality of connecting bolt holes 1111 spaced apart along the circumferential direction. Correspondingly, the first connection structure 1211 of the blade root assembly 12 includes a plurality of first bolt holes 1212 and a plurality of first double-ended studs 1213. The first bolt holes 1212 correspond one-to-one with the connecting bolt holes 1111. One end of each first double-ended stud 1213 is threaded to a connecting bolt hole 1111, and the other end is threaded to a corresponding first bolt hole 1212, so as to realize the connection and assembly between the blade body 11 and the blade root assembly 12 through the double-ended studs. Among them, when the first bolt holes 1212 and the connecting bolt holes 1111 are uniformly arranged along the circumferential direction, the force on the blade body 11 and the blade root assembly 12 is more uniform after connection.

[0059] Similarly, such as Figure 7 and Figure 8 As shown, the second connection structure 1215 of the blade root assembly 12 includes multiple second bolt holes 1216 and multiple second double-ended studs 1217. The multiple second bolt holes 1216 are spaced apart in the circumferential direction, and the hub of the wind turbine also has corresponding connection holes. When the blade root assembly 12 is connected and fixed to the hub, one end of each second double-ended stud 1217 is threaded to one of the second bolt holes 1216, and the other end is threaded to the corresponding connection hole on the hub, so as to achieve the connection and assembly between the blade root assembly 12 and the hub through the second double-ended studs 1217. When the second bolt holes 1216 and the connection holes on the hub are all evenly arranged in the circumferential direction, the force on the blade root assembly 12 after being connected to the hub is more even.

[0060] Furthermore, the blade root segment 121 of the blade root assembly 12 can be made of different materials. When the blade root segment 121 is made of steel, the first bolt hole 1212 and the second bolt hole 1216 can be directly machined into the blade root segment 121 by drilling, making the manufacturing process simple and convenient. When the blade root segment 121 is made of fiberglass, pre-embedded bolt sleeve structures can be provided at both ends of the blade root segment 121. These bolt sleeve structures can be made of steel; the bolt sleeve structure closer to the blade body 11 has the first bolt hole 1212, and the bolt sleeve structure farther from the blade body 11 has the second bolt hole 1216. During the injection molding of the blade root segment 121, the bolt sleeve structure and the blade root segment 121 are cast as a single unit to prevent cracking caused by directly drilling into the fiberglass blade root segment 121.

[0061] In some embodiments of the present invention, such as Figure 9 and Figure 10 As shown, the wind turbine blade assembly 1 also includes a first flange ring 131. The first flange ring 131 is disposed between the blade root assembly 12 and the blade body 11; the shape and size of the first flange ring 131 are adapted to the blade root connection portion 111 of the blade root assembly 12 and the blade body 11, and the first flange ring 131 is provided with a plurality of first through holes 1312. The plurality of first through holes 1312 are spaced apart in the circumferential direction of the first flange ring 131, and each first through hole 1312 extends axially; the number and size of the first through holes 1312 are adapted to the first double-ended studs 1213. Each first double-ended stud 1213 corresponds to a first through hole 1312 and a connecting bolt hole 1111 on the blade body 11. The first double-ended stud 1213 passes through the corresponding first through hole 1312 on the first flange ring 131, and both ends are threaded into the first bolt hole 1212 of the blade root segment 121 and the connecting bolt hole 1111 of the blade body 11, respectively, to form a detachable connection with the blade root assembly 12 and the blade body 11.

[0062] In this embodiment, by adding a first flange ring 131 between the blade root assembly 12 and the blade body 11, a strengthening effect is achieved, which helps to improve the connection strength between the blade root assembly 12 and the blade body 11.

[0063] Similarly, such as Figure 9 As shown, the wind turbine blade assembly 1 can also have a second flange ring 132 installed at one end of the blade root assembly 12 used to connect to the hub of the wind turbine. The structure of the second flange ring 132 is similar to... Figure 10The structure of the first flange ring 131 shown is similar. The shape and structure of the second flange ring 132 are adapted to the connecting pitch circle of the hub and the end of the blade root assembly 12 used to connect to the hub. The second flange ring 132 is provided with a plurality of second through holes 1322, which are spaced apart in the circumferential direction of the second flange ring 132, and each second through hole 1322 extends axially. Each second double-ended stud 1217 corresponds to a second through hole 1322 and a connecting hole on the hub. The second double-ended stud 1217 passes through the corresponding second through hole 1322 on the second flange ring 132, and its two ends are threadedly connected to the second bolt hole 1216 on the blade root segment 121 and the corresponding connecting hole on the hub, respectively, so that the blade root assembly 12 and the hub form a detachable connection. By adding a second flange ring 132 between the blade root assembly 12 and the hub, the connection strength between the blade root assembly 12 and the hub is enhanced.

[0064] It should be noted that the first through hole 1312 and the second through hole 1322 can be either smooth holes or threaded holes. Of course, the wind turbine blade assembly 1 may also only have the first flange ring 131 or only the second flange ring 132.

[0065] In some embodiments of the present invention, such as Figure 11 As shown, in the wind turbine blade assembly 1, the blade root assembly 12 also includes a surface structure 123. The surface structure 123 includes a flexible cover 1231 and a fixing layer 1232. The flexible cover 1231 can be made of materials such as fiberglass cloth; the flexible cover 1231 is arranged along the circumferential direction of the blade root assembly 12 and covers the outer surface of multiple blade root segments 121; the fixing layer 1232 is formed by injecting a potting material, such as resin; the potting material covers the outer surface of the flexible cover 1231 and the blade root segments 121, and after the potting material cures, it forms the fixing layer 1232 and forms a connection with the flexible cover 1231 and the outer surface of the blade root segments 121. In the specific manufacturing process, the surface structure 123 can be laid and potted on the outer surface of the blade root assembly 12 after the blade root assembly 12 is connected to the blade body 11.

[0066] In this embodiment, by providing a surface structure 123 on the outer surface of the blade root assembly 12, the aerodynamic shape of the blade root assembly 12 can be made smoother, which helps to reduce air resistance and improve the aerodynamic performance and structural stability of the wind power generation blade device 1 during use.

[0067] In some embodiments of the present invention, such as Figure 1 and Figure 12As shown, in the wind power blade assembly 1, in the circumferential direction of the blade root assembly 12, a third connecting structure 122 is provided at the junction of two adjacent blade root segments 121, so that the two adjacent blade root segments 121 can be detachably connected to each other through the third connecting structure 122, thereby enhancing the overall strength of the blade root assembly 12 and facilitating the overall force distribution of the blade root assembly 12.

[0068] Furthermore, such as Figure 12 As shown, the third connecting structure 122 includes a slot structure 1221 and a hook structure 1222. Specifically, between two adjacent blade root segments 121, the slot structure 1221 is provided on one of the blade root segments 121 and located at the side edge in the circumferential direction, while the hook structure 1222 is provided on the other blade root segment 121 and located opposite to the slot structure 1221 in the circumferential direction. The hook structure 1222 and the slot structure 1221 engage to form a connection between the two adjacent blade root segments 121. When multiple blade root segments 121 are assembled to form a rotating body structure, any two adjacent blade root segments 121 can be connected to each other, thereby enhancing the overall strength of the blade root assembly 12. After assembly, the overall force of the blade root assembly 12 can be transmitted between different blade root segments 121, making the overall force more uniform.

[0069] Specifically, the hook structure 1222 and the slot structure 1221 can be as follows: Figure 12 In the example shown, the hook structure 1222 and the slot structure 1221 are respectively set on different sides of the two blade root segments 121. When the hook structure 1222 and the slot structure 1221 are engaged, there is a certain overlap between the two blade root segments 121 in the radial direction. Of course, the slot structure 1221 and the hook structure 1222 can also be set on the end faces of the joint of the two blade root segments 121 respectively. The slot structure 1221 is axially continuous, and the hook structure 1222 can extend into the slot structure 1221 from one end, which can also achieve the engagement.

[0070] It should be noted that there can be one or more third connecting structures 122 between two adjacent blade root segments 121. When multiple third connecting structures 122 are provided, multiple slot structures 1221 can be provided on one blade root segment 121, and multiple hook structures 1222 can be provided on the other blade root segment 121. Alternatively, both slot structures 1221 and hook structures 1222 can be provided on one blade root segment 121, and hook structures 1222 and slot structures 1221 can be provided on the other blade root segment 121, so that the slot structures 1221 and hook structures 1222 can correspond one-to-one, thereby further improving the connection strength.

[0071] The following is a specific embodiment of the wind turbine blade device 1 of the present invention:

[0072] like Figure 1 and Figure 2 As shown, the wind turbine blade assembly 1 includes a blade body 11 and a blade root assembly 12. The blade body 11 and the blade root assembly 12 are separate structures; one end of the blade body 11 is provided with a blade root connecting part 111 for connecting the blade root assembly 12. When applied in a wind power generation device, one end of the blade root assembly 12 is detachably connected to the blade root connecting part 111 of the blade body 11, and the other end of the blade root assembly 12 is detachably connected to the hub of the wind power generation device, so as to realize the connection and fixation between the blade body 11 and the hub of the wind power generation device through the blade root assembly 12; the blade body 11 drives the blade root assembly 12 and the hub to rotate under the action of wind power, providing power for the wind power generation device.

[0073] like Figures 1 to 3 As shown, the blade root assembly 12 includes multiple separate blade root segments 121 and a surface structure disposed on the outer surface of the blade root segments 121. The number of blade root segments 121 can be as follows: Figure 3 The diagram shows three blade root segments 121, each with an arc-shaped cross-section. Multiple blade root segments 121 are arranged sequentially along the circumferential direction of the blade body 11, forming a rotating blade root assembly 12 for connection to the blade body 11 and the hub of the wind turbine. For example... Figure 3 and Figure 4 As shown, the multiple blade root segments 121 are all of the same size, and any two blade root segments 121 can be interchanged with each other, so that the multiple blade root segments 121 that make up the blade root assembly 12 are all parts of the same specification. Only one type of part needs to be processed in the production process, which simplifies the production process and improves the versatility of the blade root segments 121, which is conducive to further reducing costs.

[0074] like Figure 4 As shown, a first connecting structure 1211 is provided at one end of the blade root segment 121 near the blade body 11. The first connecting structure 1211 is adapted to the blade root connecting part 111 of the blade body 11 and is used to connect and assemble with the blade root connecting part 111 of the blade body 11. A second connecting structure 1215 is provided at one end of the blade root segment 121 away from the blade body 11. The second connecting structure 1215 is used to connect and assemble with the hub.

[0075] like Figure 7 and Figure 8As shown, the blade body 11 has a plurality of connecting bolt holes 1111 evenly arranged along the circumferential direction on the end face of the blade root connecting portion 111. Correspondingly, the first connecting structure 1211 of the blade root assembly 12 includes a plurality of first bolt holes 1212 and a plurality of first double-ended studs 1213. The first bolt holes 1212 correspond one-to-one with the connecting bolt holes 1111. One end of each first double-ended stud 1213 is threaded to a connecting bolt hole 1111, and the other end is threaded to a corresponding first bolt hole 1212, so as to realize the connection and assembly between the blade body 11 and the blade root assembly 12 through the double-ended studs.

[0076] Similarly, such as Figure 7 and Figure 8 As shown, the second connection structure 1215 of the blade root assembly 12 includes a plurality of second bolt holes 1216 and a plurality of second double-ended studs 1217. The plurality of second bolt holes 1216 are evenly arranged along the circumferential direction, and the hub of the wind power generation equipment is also provided with corresponding connection holes; when the blade root assembly 12 is connected and fixed to the hub, one end of each second double-ended stud 1217 is threaded to a second bolt hole 1216, and the other end is threaded to the corresponding connection hole on the hub, so as to realize the connection and assembly between the blade root assembly 12 and the hub through the second double-ended studs 1217.

[0077] When the blade root segment 121 is made of steel, the first bolt hole 1212 and the second bolt hole 1216 can be directly machined into the blade root segment 121 by drilling. When the blade root segment 121 is made of fiberglass, pre-embedded bolt sleeve structures can be set at both ends of the blade root segment 121. The bolt sleeve structures can be made of steel, with the first bolt hole 1212 machined on the bolt sleeve structure closer to the blade body 11, and the second bolt hole 1216 machined on the bolt sleeve structure farther from the blade body 11. The bolt sleeve structures are integrally cast with the blade root segment 121 to prevent cracking caused by drilling directly into the fiberglass blade root segment 121.

[0078] like Figures 1 to 4 As shown, in one specific implementation of the blade root assembly 12, the blade root assembly 12 is a hollow cylindrical structure, and the cylindrical structure is axially continuous. The diameters of the two ends of the blade root assembly 12 in the axial direction are equal. The cylindrical structure is relatively simple, and the corresponding blade root segments 121 have the same arc at any position in the axial direction. The structure of a single blade root segment 121 is simple, easy to process and manufacture, and the stress is relatively uniform.

[0079] In another implementation of the blade root assembly 12, the diameters of the two ends of the blade root assembly 12 in the axial direction are different. In one case, such as Figure 5As shown, the diameter of the end of the blade root assembly 12 used to connect to the hub is larger than the diameter of the end used to connect to the blade body. Specifically, the blade root assembly 12 is a frustum-shaped structure with an axially continuous truncated cone. The end of the frustum-shaped structure with a larger diameter is used to connect to the hub of the wind turbine, and the end with a smaller diameter is connected to the blade root connection portion 111 of the blade body 11. This adapts to situations where the diameter of the mounting position on the hub of the wind turbine is larger than the diameter of the blade root connection portion 111 of the blade body 11. The frustum-shaped structure is a regular structure, and the structure of each blade root segment 121 is relatively simple, easy to manufacture, and the stress is relatively uniform.

[0080] In another case, such as Figure 6 As shown, the diameter of the end of the blade root assembly 12 used to connect to the hub is smaller than the diameter of the end used to connect to the blade body 11. Specifically, the blade root assembly 12 is a truncated cone structure with an axially continuous truncated cone. The end of the truncated cone structure with a smaller diameter is used to connect to the hub of the wind turbine, and the end with a larger diameter is connected to the blade root connection portion 111 of the blade body 11. This adapts to situations where the diameter of the mounting position on the hub of the wind turbine is smaller than the diameter of the blade root connection portion 111 of the blade body 11. The truncated cone structure is a regular structure, and the structure of each blade root segment 121 is relatively simple, easy to manufacture, and the stress is relatively uniform.

[0081] like Figure 11 As shown, the surface structure 123 of the blade root assembly 12 includes a flexible cover 1231 and a fixing layer 1232. The flexible cover 1231 can be made of materials such as fiberglass cloth, and is arranged along the circumferential direction of the blade root assembly 12 and covers the outer surface of multiple blade root segments 121. The fixing layer 1232 is formed by injecting a resin or other potting material. The potting material covers the outer surface of the flexible cover 1231 and the blade root segments 121. After the potting material cures, it forms the fixing layer 1232 and connects with the flexible cover 1231 and the outer surface of the blade root segments 121. In the specific manufacturing process, the surface structure 123 can be laid and potted on the outer surface of the blade root segments 121 after the blade root segments 121 are connected to the blade body 11.

[0082] like Figure 9 and Figure 10 As shown, the wind turbine blade assembly 1 also includes a first flange ring 131 and a second flange ring 132. The first flange ring 131 is disposed between the blade root assembly 12 and the blade body 11; the second flange ring 132 is disposed between the blade root assembly 12 and the hub of the wind turbine.

[0083] The shape and dimensions of the first flange ring 131 are adapted to the blade root assembly 12 and the blade root connection portion 111 of the blade body 11, and the first flange ring 131 is provided with a plurality of first through holes 1312. The plurality of first through holes 1312 are spaced apart in the circumferential direction of the first flange ring 131, and each first through hole 1312 extends axially; the number and size of the first through holes 1312 are adapted to the first double-ended studs 1213. Each first double-ended stud 1213 corresponds to a first through hole 1312 and a connecting bolt hole 1111 on the blade body 11. The first double-ended stud 1213 passes through the corresponding first through hole 1312 on the first flange ring 131, and both ends are threaded into the first bolt hole 1212 of the blade root segment 121 and the connecting bolt hole 1111 of the blade body 11, respectively, to form a detachable connection with the blade root assembly 12 and the blade body 11.

[0084] Similarly, the shape and structure of the second flange ring 132 are adapted to the connecting pitch circle of the hub and the end of the blade root assembly 12 used to connect to the hub. The second flange ring 132 has multiple second through holes 1322, which are spaced apart in the circumferential direction of the second flange ring 132, and each second through hole 1322 extends axially. Each second double-ended stud 1217 corresponds to a second through hole 1322 and a connecting hole on the hub. The second double-ended stud 1217 passes through the corresponding second through hole 1322 on the second flange ring 132, and its two ends are threadedly connected to the second bolt hole 1216 on the blade root segment 121 and the corresponding connecting hole on the hub, respectively, so that the blade root assembly 12 and the hub form a detachable connection. The first through hole 1312 and the second through hole 1322 can be smooth holes or threaded holes. By adding the first flange ring 131 and the second flange ring 132, the connection strength between the blade root assembly 12, the blade body 11, and the hub is enhanced.

[0085] like Figure 12 As shown, in the circumferential direction of the blade root assembly 12, a third connecting structure 122 is provided at the junction of two adjacent blade root segments 121, so that the two adjacent blade root segments 121 can be detachably connected to each other through the third connecting structure 122. Specifically, as shown... Figure 8As shown, the third connecting structure 122 includes a slot structure 1221 and a hook structure 1222. Between two adjacent blade root segments 121, the slot structure 1221 is disposed on one of the blade root segments 121 and located at its side edge in the circumferential direction. The hook structure 1222 is disposed on the other blade root segment 121 and is located opposite to the slot structure 1221 in the circumferential direction. The hook structure 1222 and the slot structure 1221 engage to form a connection between adjacent blade root segments 121. This allows any two adjacent blade root segments 121 to connect to each other when multiple blade root segments 121 are combined to form a rotating blade root assembly 12, thereby enhancing the overall strength of the blade root assembly 12 and making the overall stress distribution more uniform.

[0086] Among them, the hook structure 1222 and the slot structure 1221 can be as follows: Figure 8 In the example shown, the leaf roots are positioned on different sides of the two leaf root segments 121, or as shown in the example below. Figure 8 As shown, the slot structure 1221 extends through the axial direction, and the hook structure 1222 can extend into the slot structure 1221 from one end of the slot structure 1221.

[0087] In this embodiment, the structure and assembly method of the blade root assembly 12 of the wind turbine blade device 1 have been optimized and improved. The blade root assembly 12 is composed of multiple blade root segments 121 spliced ​​together, which greatly reduces the size of a single blade root segment 121. The manufacturing and transportation operations can be carried out separately, and the assembly is carried out when it is assembled with the hub of the wind turbine. This effectively reduces the difficulties in the manufacturing and transportation links. At the same time, the overall size of the blade root assembly 12 can be further increased to accommodate a larger blade body 11, which is conducive to further improving the swept area and power generation of the wind turbine blade.

[0088] The multiple blade root segments 121 that make up the blade root assembly 12 all have the same structure, further reducing the types of parts. Only blade root segments 121 of the same specification need to be processed, simplifying the manufacturing process. The blade root segments 121 are interchangeable, increasing their versatility. The first flange ring 131 and the second flange ring 132 further improve the connection strength of the wind turbine blade assembly 1. After the blade root assembly 12 is assembled with the blade body 11, a surface structure 123 is processed on the outer surface of the blade root assembly 12, making its aerodynamic shape smoother and further improving the aerodynamic performance and structural stability of the wind turbine blade assembly 1.

[0089] Furthermore, due to the separate design between the blade root assembly 12 and the blade body 11, as well as the segmented design of the blade root assembly 12 itself, the adaptability is stronger. Different specifications of blade root assemblies 12 can be developed according to usage requirements. When blade bodies 11 of different sizes and specifications are assembled with hubs, only the appropriate blade root assembly 12 needs to be selected to achieve connection and installation. For blade bodies 11 and hubs of different sizes and specifications, the connection can be achieved by replacing the blade root assembly 12 of the corresponding size to match the axial length of the blade body 11 and the size of the hub connection pitch circle, making the wind power generation blade device 1 more adaptable and more flexible in assembly.

[0090] In an embodiment of the second aspect of the present invention, a wind power generation device 2 is also provided, such as... Figure 1 and Figure 13 As shown, the wind power generation equipment 2 includes a support tower 21, a main body 22, and at least one wind power generation blade assembly 1 as described in the first aspect embodiment above.

[0091] A support tower 21 is used for support and fixation. The main body 22 is mounted on the support tower 21 and includes a power generation device 221 and a hub 222. The hub 222 is rotatably connected to the support tower 21 and is drively connected to the input end of the power generation device 221. At least one wind turbine blade device 1 as described in the first aspect embodiment is spaced apart on the hub 222 along the circumferential direction. The blade body 11 of the wind turbine blade device 1 is connected to the hub 222 through a blade root assembly 12. Under the action of wind, the blade body 11 drives the hub 222 to rotate through the blade root assembly 12, thereby providing power to the power generation device 221, driving the power generation device 221 to work, and realizing wind power generation.

[0092] Because the blade root assembly 12 and the blade body 11 adopt a split design, and the blade root assembly 12 itself adopts a segmented design, the difficulties in the manufacturing and transportation of the blade root assembly 12 are greatly reduced. This avoids size limitations on the blade root assembly 12 and the blade body 11, allowing for the assembly of larger blade bodies 11 to further increase the swept area and power generation of the wind power generation equipment 2. Moreover, for blade bodies 11 and hubs 222 of different sizes, the connection can be achieved by replacing the blade root assembly 12 of the corresponding size to match the axial length of the blade body 11 and the connection pitch circle size of the hub 222, making the assembly flexibility of the wind power generation equipment higher.

[0093] It should be noted that the number of wind turbine blade units 1 in the wind power generation equipment 2 is not limited to... Figure 13 The three shown could also be two or more. This could mean that all the blade units on hub 222 are wind turbine blade units 1 (e.g., ...). Figure 12 (As shown in the diagram), it can also be that among all the blade devices of the hub 222, one part is the wind power generation blade device 1 and the other part is the ordinary blade device, that is, the wind power generation blade device 1 and the ordinary blade device form a combination and work together to drive the hub 222 to rotate.

[0094] Furthermore, the wind power generation device 2 in this embodiment also has all the beneficial effects of the wind power generation blade device 1 in any of the above embodiments, which will not be repeated here.

[0095] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0096] The block diagrams of the devices, apparatuses, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it. It should also be noted that in the apparatuses and devices of this invention, the components can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalents of the invention.

[0097] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0098] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features of the invention herein.

[0099] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind turbine blade device, characterized in that, include: The blade body (11) has a blade root connecting part (111) at one end; The leaf root assembly (12) includes multiple leaf root segments (121), which are arranged in a circumferential direction around the blade body (11) to form a rotating body, and each leaf root segment (121) is detachably connected to a corresponding part on the leaf root connecting part (111). A first flange ring (131) is disposed between the blade root assembly (12) and the blade body (11). The first flange ring (131) has a plurality of first through holes (1312) extending axially, and the plurality of first through holes (1312) are spaced apart in the circumferential direction; and / or The second flange ring (132) is located between the blade root assembly (12) and the hub (222) of the wind power generation equipment. The second flange ring (132) has a plurality of second through holes (1322), and the plurality of second through holes (1322) are spaced apart in the circumferential direction. Each blade root segment (121) has an arc-shaped cross-section, and on the axial direction of the blade root assembly (12), one end is provided with a first connecting structure (1211) adapted to the blade root connecting part (111), and the other end is provided with a second connecting structure (1215) adapted to the hub (222). The leaf root connecting part (111) has a plurality of connecting bolt holes (1111) on its end face, and the plurality of connecting bolt holes (1111) are spaced apart in the circumferential direction. The first connecting structure (1211) includes a plurality of first bolt holes (1212) and a plurality of first double-ended studs (1213). The plurality of first bolt holes (1212) are spaced apart circumferentially and are arranged opposite to the connecting bolt holes (1111). One end of each first double-ended stud (1213) is threaded to one of the connecting bolt holes (1111), and the other end is threaded to a corresponding first bolt hole (1212). The first double-ended stud (1213) passes through the first through hole (1312) and is connected to the blade root assembly (12) and the blade body (11). The second connection structure (1215) includes a plurality of second bolt holes (1216) and a plurality of second double-ended studs (1217). The plurality of second bolt holes (1216) are spaced apart circumferentially. One end of each second double-ended stud (1217) is threaded to one of the second bolt holes (1216), and the other end is threaded to a corresponding connection hole on the hub (222). The second double-ended stud (1217) passes through the second through hole (1322) and is connected to the blade root assembly (12) and the hub (222).

2. The wind turbine blade device according to claim 1, characterized in that, The diameter of the end of the blade root assembly (12) used to connect to the hub (222) is equal to the diameter of the end used to connect to the blade body (11).

3. The wind turbine blade device according to claim 2, characterized in that, The leaf root assembly (12) is an axially continuous cylindrical structure.

4. The wind turbine blade device according to claim 1, characterized in that, The diameter of the blade root assembly (12) used to connect to one end of the hub (222) is greater than or less than the diameter of the end connected to the blade body (11).

5. The wind turbine blade device according to claim 4, characterized in that, The leaf root assembly (12) is an axially continuous frustum structure.

6. The wind turbine blade device according to claim 1, characterized in that, All of the leaf root segments (121) are of the same size.

7. The wind turbine blade device according to claim 1, characterized in that, The leaf root segment (121) is a steel structure, and both the first bolt hole (1212) and the second bolt hole (1216) are formed by direct drilling; or The leaf root segment (121) is made of fiberglass. Both ends of the leaf root segment (121) are provided with pre-embedded bolt sleeve structures. The bolt sleeve structure at one end of the leaf root segment (121) is provided with the first bolt hole (1212), and the bolt sleeve structure at the other end of the leaf root segment (121) is provided with the second bolt hole (1216).

8. The wind turbine blade assembly according to any one of claims 1 to 7, characterized in that, The leaf root assembly (12) also includes: The surface structure (123) includes a flexible cover (1231) and a fixing layer (1232). The flexible cover (1231) is arranged along the circumferential direction of the leaf root assembly (12) and covers the outer surface of the plurality of leaf root segments (121). The fixing layer (1232) is formed by injecting a filling material and covers the outer surface of the flexible cover (1231) and the leaf root segments (121).

9. The wind turbine blade assembly according to any one of claims 1 to 7, characterized in that, In the circumferential direction of the leaf root assembly (12), a third connecting structure (122) is provided at the junction of two adjacent leaf root segments (121), and the two adjacent leaf root segments (121) are connected to each other through the corresponding third connecting structure (122).

10. The wind turbine blade device according to claim 9, characterized in that, The third connection structure (122) includes: A slot structure (1221) is provided at the side edge of one of the leaf root segments (121) in the circumferential direction; A hook structure (1222) is provided on another adjacent leaf root segment (121) in a position opposite to the slot structure (1221) in the circumferential direction, and the hook structure (1222) engages with the slot structure (1221).

11. A wind power generation device, characterized in that, include: Support tower (21); The main body (22) includes a power generation device (221) and a hub (222), which are mounted on the support tower (21). The hub (222) is connected to the input end of the power generation device (221). At least one wind turbine blade assembly as described in any one of claims 1 to 10 is connected to the hub (222).

Images