Wind power equipment and blade device thereof

Abstract

This invention discloses a blade assembly, comprising a root section and a tip section arranged from the inside to the outside along the length of the blade assembly. Several intermediate sections are sequentially arranged end-to-end along the length of the blade assembly between the root section and the tip section. Flanges are provided at the outer end of the root section, the inner end of the tip section, and both ends of each intermediate section. The flanges have a limiting hole in the middle for any one of the root section, tip section, or intermediate section to pass through and fit. The root section and intermediate sections, the intermediate section and tip section, and adjacent intermediate sections are connected by bolts passing through the flanges. This blade assembly is simple and easy to connect, has high assembly strength, and its overall structure is safe and reliable. This invention also discloses a wind turbine using the above-described blade assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of supporting equipment for wind power generation equipment, and in particular to a blade device. The present invention also relates to a wind power equipment using the blade device. Background Art

[0002] As wind turbines become larger, wind turbine blades are getting longer and longer, resulting in a large production area for blades and difficulty in transportation and installation. Especially for areas with complex terrain, transportation is even more restricted by the length of the blades. In addition, the production cost of a single super-long blade is high, and local defects will cause the entire blade to be scrapped, which is a high risk. Therefore, technicians and researchers in the industry are considering producing and storing blades in sections or even blocks.

[0003] There are many benefits to adopting segmented design and manufacturing. First, segmented design and manufacturing can save space occupied by blade molds and improve production efficiency; second, segmented design and manufacturing can reduce the risk of manufacturing defects or damage to a single blade during operation, and only the blade segment where the defect or failure area is located needs to be replaced; finally, segmented design and manufacturing is beneficial to the development of serialized blades and extend the service life of blade molds.

[0004] The segmented blade is made by dividing the blade into two or more blade segments, and the adjacent blade segments are connected in various ways after being formed to form a complete blade. In the conventional structure of the existing segmented blade, the connection between the adjacent blade segments mainly includes T-bolt connection, clamping connection, adhesive connection and the like.

[0005] In general, the existing segmented blade technology is to divide the original whole blade into multiple sections, and connect the sections while maintaining the original aerodynamic shape of the blade as much as possible. For the existing segmented blade connection structure design, when conventional bolts are used for connection, the structure is complex and difficult to install and maintain; due to the strength limit of the adhesive connection, the safety is low when the adhesive connection is used, and when the load is too large, the connection parts cannot meet the strength requirements.

[0006] Therefore, how to make the connection operation of the segmented blades simple and easy, and improve the assembly strength thereof, so as to make the overall structure of the blade device safer and more reliable is an important technical problem that technical personnel in this field need to solve at present. Summary of the invention

[0007] The object of the present invention is to provide a blade device, the connection operation of which is simple and easy, the assembly strength is high, and the overall structure is safe and reliable. Another object of the present invention is to provide a wind power device using the blade device.

[0008] In order to solve the above technical problems, the present invention provides a blade device, comprising a blade root section and a blade tip section arranged from inside to outside along the length direction of the blade device, and a plurality of intermediate sections are sequentially arranged end to end between the blade root section and the blade tip section along the length direction of the blade device;

[0009] The outer end of the blade root segment, the inner end of the blade tip segment and both ends of each of the intermediate segments are provided with flanges, the middle portion of the flange has a limiting hole for any one of the blade root segment, the blade tip segment or the intermediate segment to penetrate and adapt, the blade root segment and the intermediate segment, the intermediate segment and the blade tip segment, and two adjacent intermediate segments are respectively connected and disassembled by bolts penetrating the flanges.

[0010] Preferably, the flange member is a circular flange plate arranged extending along the circumference of the blade device.

[0011] Preferably, any two flanges connected to each other by bolts have the same shape and size.

[0012] Preferably, the flange is penetrated by a plurality of screw holes which are aligned and matched with the bolts, and the screw holes are evenly and equidistantly arranged along the circumference of the flange.

[0013] Preferably, a flange shield is provided on the outer end surface of the flange component, and the flange shield is detachably compatible with the flange component.

[0014] Preferably, a flange gasket is coaxially arranged on one end surface of the flange.

[0015] Preferably, the lengths of the blade root section, the blade tip section and the middle section are all no longer than 30 meters.

[0016] Preferably, the lengths of the blade root section, the blade tip section and the middle section are not less than 10 meters.

[0017] The present invention also provides a wind power equipment, including a frame and a blade assembly rotatably arranged on the frame, wherein the blade assembly is provided with a plurality of blade devices arranged along the circumference of the blade assembly and extending along its radial direction, and the blade device is a blade device as described in any one of the above items.

[0018] Compared with the above background technology, the blade device provided by the present invention has the blade root section, the blade tip section and the middle section independently processed and manufactured during its assembly and operation process, so as to facilitate the relevant storage and transportation. When it is necessary to assemble the blade device, the blade root section, the middle sections and the blade tip section can be aligned and adapted one by one through the flange parts, and the corresponding segmented components can be fixed with the reference limit holes in the middle of the flange parts, and the above segmented components can be connected and reliably assembled in sequence through bolts to form the main structure of the blade device; when any component of the above-assembled blade root section, middle section and blade tip section is damaged or needs to be repaired or replaced due to other circumstances, the corresponding segmented component can be removed by removing the bolts at the corresponding position. After the repair or replacement is completed, the repaired or replaced component is rearranged at the corresponding position, and the component and its adjacent component are reliably assembled through the threaded fastening between the bolt and the flange part at the corresponding position, so as to ensure the subsequent stable operation of the blade device. The disassembly and assembly connection structure between the bolt and the flange is simple and reliable, and the disassembly and assembly operation is simple and easy. It can greatly reduce the difficulty of assembly connection and component disassembly operation of the blade device, make the connection operation simple and easy, and improve the overall assembly strength accordingly, making the work and operation process of the entire blade device safer and more reliable.

[0019] In another preferred embodiment of the present invention, the flange is a circular flange extending along the circumference of the blade device. The structure of the circular flange is stable and reliable, and its circular structure can further optimize the assembly stress distribution between the flange and the bolts, making the assembly connection structure between adjacent segmented components more stable and reliable, thereby improving the overall structural strength of the blade device accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the assembly structure of a blade device provided in a specific embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of a flange member that is aligned and matched with the end of the blade tip section or the middle section;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the flange member which is aligned and matched with the end of the blade root section;

[0024] Figure 4 For Figure 3 A schematic diagram of the structure of the flange gasket that is adapted to the flange part shown in FIG.

[0025] Figure 5 for Figure 3 Schematic diagram of the alignment and adaptation structure of the flange and the flange cover described in.

[0026] in:

[0027] 11-leaf root segment;

[0028] 12- blade tip segment;

[0029] 13-middle segment;

[0030] 14-flange;

[0031] 141-limiting hole;

[0032] 142- screw hole;

[0033] 143-flange guard;

[0034] 144-flange gasket;

[0035] 15-Bolt. DETAILED DESCRIPTION

[0036] The core of the present invention is to provide a blade device, the connection operation of which is simple and easy, and the assembly strength is high, and the overall structure is safe and reliable; at the same time, a wind power equipment using the above blade device is provided.

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Furthermore, in the present invention, unless explicitly specified and limited otherwise, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other through another feature therebetween.

[0040] In addition, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] Please refer to Figures 1 to 5 .

[0042] In a specific embodiment, the blade device provided by the present invention comprises a blade root section 11 and a blade tip section 12 arranged from inside to outside along the length direction of the blade device, and a plurality of intermediate sections 13 are sequentially arranged end to end between the blade root section 11 and the blade tip section 12 along the length direction of the blade device;

[0043] The outer end of the blade root segment 11, the inner end of the blade tip segment 12 and both ends of each intermediate segment 13 are provided with a flange 14, and the middle part of the flange 14 has a limiting hole 141 for any one of the blade root segment 11, the blade tip segment 12 or the intermediate segment 13 to penetrate and adapt. The blade root segment 11 and the intermediate segment 13, the intermediate segment 13 and the blade tip segment 12, and the two adjacent intermediate segments 13 are respectively connected and disassembled by bolts 15 penetrating the flange 14.

[0044] During its assembly and operation, the blade root section 11, the blade tip section 12 and the middle section 13 are independently processed and manufactured to facilitate storage and transportation. When the blade device needs to be assembled, the blade root section 11, the middle sections 13 and the blade tip section 12 can be aligned and adapted one by one through the flanges 14, and the corresponding segmented components can be fixed by the limit holes 141 in the middle of the flanges 14, and the above-mentioned segmented components are connected and reliably assembled in sequence through bolts 15 to form the main structure of the blade device; when any component of the assembled blade root section 11, the middle section 13 and the blade tip section 12 is damaged or needs to be repaired or replaced due to other circumstances, the corresponding segmented component can be removed by removing the bolts 15 at the corresponding positions. After the repair or replacement is completed, the repaired or replaced components are rearranged at the corresponding positions, and the components and their adjacent components are reliably assembled through the threaded fastening between the bolts 15 and the flanges 14 at the corresponding positions, so as to ensure the subsequent stable operation of the blade device. The disassembly and assembly connection structure between the bolt 15 and the flange 14 is simple and reliable, and the disassembly and assembly operation is simple and easy, which can greatly reduce the difficulty of assembly connection and component disassembly operation of the blade device, making the connection operation simple and easy, and the overall assembly strength of the blade device is correspondingly improved, and the work and operation process of the entire blade device are safer and more reliable.

[0045] It should be noted that in actual applications, for blade devices of different specifications and structures, multiple intermediate sections 13 can be sequentially spliced ​​and assembled to achieve corresponding adjustment of the effective extension length of the main structure of the blade device. It is also possible to select intermediate sections 13, blade tip sections 12 or blade root sections 11 of different shapes and specifications to assemble each other according to actual working conditions, so as to meet the corresponding working conditions and the adjustment requirements of the overall shape of the blade device. The staff can flexibly select and adjust according to the specific working conditions. In principle, as long as it can meet the actual application needs of the blade device and ensure the reliability of its component assembly.

[0046] It should be pointed out that the segmented components mentioned above refer to the segmented components such as the blade root segment 11, the blade tip segment 12, the middle segment 13, etc. The segmented components mentioned in the rest of this article can be understood with reference to this and will not be repeated here.

[0047] Furthermore, the flange 14 is a circular flange extending along the circumference of the blade device. The structure of this circular flange is stable and reliable, and its circular structure can further optimize the assembly stress distribution between the flange 14 and the bolt 15, making the assembly connection structure between adjacent segmented components more stable and reliable, thereby improving the overall structural strength of the blade device accordingly.

[0048] Please focus on Figure 4 .

[0049] On this basis, a flange gasket 144 is coaxially arranged on one end face of the flange 14. Specifically, the flange gasket 144 is arranged correspondingly at the end fitting position of the flange 14 and its correspondingly assembled blade root section 11, blade tip section 12 or middle section 13, so as to further optimize the assembly stress distribution and connection stability after the flange 14 and the bolt 15 are aligned and fastened, and ensure the overall assembly strength and structural reliability of the blade device.

[0050] Please focus on Figure 5 .

[0051] Furthermore, a flange shield 143 is provided on the outer end surface of the flange 14, and the flange shield 143 is adapted to be assembled and disassembled. The flange shields 143 are arranged on the outer end surface of each flange 14, which can effectively prevent the bolts 15 assembled on the flange 14 from being corroded due to long-term exposure to the external environment, and ensure that the assembly structure between the bolts 15 and the flange 14 is stable and reliable; at the same time, the flange shield 143 can also moderately reduce the influence of the external structure of the flange 14 on the overall external structure of the blade device, and ensure the aerodynamic performance and working reliability of the blade device during operation.

[0052] Specifically, any two flanges 14 connected to each other by bolts 15 have the same shape and size. The arrangement structure of the flanges 14 having the same shape and size is adopted, which helps to further optimize the structural adaptation effect between the two adjacent flanges 14, improve the alignment accuracy and assembly efficiency between the two adjacent segmented components, and make the assembly and disassembly operation of the blade device more convenient and efficient.

[0053] More specifically, the flange 14 is penetrated with a plurality of screw holes 142 which are aligned and matched with the bolts 15, and the screw holes 142 are evenly and equidistantly arranged along the circumference of the flange 14. The structure of evenly and equidistantly arranging the screw holes 142 helps to further optimize the assembly stress distribution between the bolts 15 and the flange 14, making the assembly connection between the corresponding segmented components more stable and reliable, and improving the overall assembly strength of the blade device accordingly.

[0054] On the other hand, the lengths of the blade root section 11, the blade tip section 12 and the middle section 13 are all no longer than 30 meters. The 30-meter length upper limit helps to limit the main lengths of the segmented components such as the blade root section 11, the blade tip section 12 and the middle section 13 within an appropriate range, so as to further optimize the production, processing, storage and transportation convenience of each segmented component.

[0055] In addition, in practical applications, the lengths of the blade root section 11, the blade tip section 12, and the middle section 13 are not less than 10 meters. Setting the lower limit of the length of each segmented component to 10 meters can avoid the situation where the length is too small and the assembly of a single blade device requires more segmented components, thereby further simplifying the component structure of the blade device, reducing its assembly difficulty, and making the assembly and disassembly operation of the blade device more convenient and efficient.

[0056] In a specific embodiment, the wind power equipment provided by the present invention comprises a frame and a blade assembly rotatably arranged on the frame, and the blade assembly is provided with a plurality of blade devices arranged along the circumference of the blade assembly and extending along the radial direction thereof, and the blade device is the blade device in the above embodiment. The connection operation of the blade device of the wind power equipment is simple and easy, and its assembly strength is high, and the overall structure is safe and reliable.

[0057] In summary, it can be seen that in the blade device provided in the present invention, during its assembly and operation, the blade root section, the blade tip section and the middle section are independently processed and manufactured to facilitate related storage and transportation. When the blade device needs to be assembled, the blade root section, the middle sections and the blade tip section can be aligned and adapted one by one through the flange parts, and the corresponding segmented components can be fixed with reference limits by using the limiting holes in the middle of the flange parts, and the above-mentioned segmented components can be connected and reliably assembled in sequence by bolts to form the main structure of the blade device; when any component of the above-mentioned assembled blade root section, middle section and blade tip section is damaged or needs to be repaired or replaced due to other circumstances, the corresponding segmented component can be removed by removing the bolts at the corresponding positions. After the repair or replacement is completed, the repaired or replaced components are rearranged at the corresponding positions, and the components are reliably assembled with their adjacent components through the threaded fastening between the bolts and the flange parts at the corresponding positions, so as to ensure the subsequent stable operation of the blade device. The disassembly and assembly connection structure between the bolt and the flange is simple and reliable, and the disassembly and assembly operation is simple and easy. It can greatly reduce the difficulty of assembly connection and component disassembly operation of the blade device, make the connection operation simple and easy, and improve the overall assembly strength accordingly, making the work and operation process of the entire blade device safer and more reliable.

[0058] In addition, the wind power equipment provided by the present invention using the above blade device has simple and easy connection operation of the blade device, high assembly strength and safe and reliable overall structure.

[0059] The blade device provided by the present invention and the wind power equipment using the blade device are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A blade device, characterized in that: It comprises a blade root section and a blade tip section arranged from inside to outside along the length direction of the blade device, and a plurality of intermediate sections are sequentially arranged end to end between the blade root section and the blade tip section along the length direction of the blade device; The outer end of the blade root segment, the inner end of the blade tip segment and both ends of each of the intermediate segments are provided with flanges, the middle portion of the flange has a limiting hole for any one of the blade root segment, the blade tip segment or the intermediate segment to penetrate and adapt, the blade root segment and the intermediate segment, the intermediate segment and the blade tip segment, and two adjacent intermediate segments are respectively connected and disassembled by bolts penetrating the flanges; The flange member is a circular flange plate arranged along the circumferential extension of the blade device. Any two flange members connected to each other by bolts have the same shape and size. A flange shield is arranged on the outer end surface of the flange member, and the flange shield and the flange member are disassembled and adapted. A flange gasket is coaxially arranged on one end surface of the flange member.

2. The blade device according to claim 1, characterized in that The flange is penetrated by a plurality of screw holes which are aligned and matched with the bolts, and the screw holes are evenly and equidistantly arranged along the circumference of the flange.

3. The blade device according to claim 1, characterized in that The lengths of the blade root section, the blade tip section and the middle section are all no longer than 30 meters.

4. The blade device according to claim 3, characterized in that The lengths of the blade root section, the blade tip section and the middle section are not less than 10 meters.

5. A wind power equipment, comprising a frame and a blade assembly rotatably arranged on the frame, wherein the blade assembly is provided with a plurality of blade devices arranged along the circumference of the blade assembly and extending along its radial direction, characterized in that: The blade device is a blade device according to any one of claims 1 to 4.

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