Wind power blade extension structure and mounting method

Abstract

The invention discloses a wind power blade extension structure and a mounting method, the wind power blade extension structure comprises an original blade web connecting fastener, an original blade web connecting coupler, an extension section web connecting coupler and an extension section web connecting fastener, the original blade web connecting coupler is provided with a first round hole, and the extension section web connecting coupler is provided with a second round hole; the extension section web plate connecting coupler is provided with a first round hole, the extension section web plate connecting coupler is provided with a second round hole, the first round hole and the second round hole correspond in position in a penetrating mode, and the original blade web plate connecting fastener penetrates through the original blade web plate coupler and then is connected with the first round hole of the original blade web plate connecting coupler in a fastening mode. According to the wind power blade extension structure and the mounting method, the problems of convenient mounting and falling prevention of the blade extension structure are solved, the mounting reliability of the extension section can be improved, and the wind power blade extension structure and the mounting method have a good effect on popularization of the extension section technology and improvement of the economic benefit of a wind field.

Description

Technical Field

[0001] The invention relates to the field of wind turbine blade production, and in particular to a wind turbine blade extension structure and an installation method. Background Art

[0002] Blades are the most basic and critical components of wind turbines. Their good design, reliable quality and superior performance are the decisive factors to ensure the normal and stable operation of the unit. Wind power generation has been widely used. The power of wind turbines is proportional to the square of the length of wind turbine blades. In many low wind speed areas, extending the blade length, that is, installing extension sections, is the most effective way to increase power generation. Therefore, a suitable extension section device can improve the reliability of the extension section installation, which has a good effect on the promotion of extension section technology and the improvement of the economic benefits of wind farms. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] The present invention is proposed in view of the above-mentioned and / or prior art problems that the wind turbine blade extension structure is not simple and not strong. Therefore, the technical problem to be solved by the present invention is to simply install the wind turbine blade extension and improve the firmness and prevent it from breaking easily.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a wind turbine blade extension structure and installation method, characterized in that: comprising:

[0006] The original blade web connecting fastener, the original blade web connecting coupling, the extended section web connecting coupling, and the extended section web connecting fastener, the original blade web connecting coupling (4) is provided with a first circular hole, the extended section web connecting coupling is provided with a second circular hole, the first circular hole and the second circular hole are positioned correspondingly, and the original blade web connecting fastener passes through the original blade web and is fastened to the first circular hole of the original blade web connecting coupling (4).

[0007] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, the extension section web connecting fastener sequentially passes through the extension section web, the second circular hole of the extension section web connecting coupling, and is then fastened to the first circular hole of the original blade web connecting coupling.

[0008] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, an original blade buffer washer is arranged between the original blade web connecting fastener and the original blade web, and the original blade web connecting fastener passes through the original blade buffer washer and the original blade web in sequence.

[0009] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, an extension section is arranged between the extension section web connecting fastener and the extension section web, and the extension section web connecting fastener passes through the extension section buffer gasket and the extension section web in sequence.

[0010] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, wherein: a positioning piece is connected to the original blade web connection coupling, a positioning hole is provided on the extension section web connection coupling, the positioning piece is inserted into the positioning hole, and a coil spring is sleeved on the positioning piece located between the original blade web connection coupling and the extension section web connection coupling.

[0011] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, the extension section web connecting coupling is pre-bonded to the extension section web by means of sealing strip glue.

[0012] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, an anti-falling device installation window is provided on the extension section.

[0013] As a preferred solution of the wind turbine blade extension structure and installation method of the present invention, the web of the extension section is a variable-section blade in the shape of a wing.

[0014] As a preferred solution of the wind turbine blade extension structure and installation method described in the present invention, the web material of the extension section is carbon fiber composite material.

[0015] The beneficial effects of the present invention are as follows: the extension section can be installed safely and conveniently through the coupling connection mode provided, the fastener at the front end of the extension section web is connected with the fastener anchor structure provided at the rear end, and a coil spring is installed in the middle connecting rod portion, which can play a role of unloading force and improve the reliability of the extension section installation, which has a good effect on the promotion of the extension section technology and the improvement of the economic benefits of the wind farm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0017] in:

[0018] Figure 1 A schematic diagram of a wind turbine blade extension structure and installation method after installation according to an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the installation process of a wind turbine blade extension structure and installation method according to an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of a web coupling connection assembly of a wind turbine blade extension structure and installation method according to an embodiment of the present invention;

[0021] Figure 4 A structural diagram of the original blade web connecting coupling of a wind turbine blade extension structure and installation method according to an embodiment of the present invention;

[0022] Figure 5 A structural diagram of a coupling connecting the web of an extension section of a wind turbine blade extension structure and installation method provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of a wind turbine blade extension structure and installation method after installation according to an embodiment of the present invention; DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1

[0029] Reference Figure 1-5 The first embodiment of the present invention provides a wind turbine blade extension structure and installation method, including: installing a connection fastener 103 on the original blade web, installing a connection coupling 104 on the original blade web, installing a connection coupling 107 on the extended web, and installing a connection fastener 108 on the extended section web. The connection fastener 108 on the extended section web is symmetrically connected to the connection fastener 103 installed on the original blade web, and is rotatably connected in the middle by a connecting rod, and a spiral spring 106 is provided at the center of the connecting rod. A first circular hole is provided at the position of the connection coupling 104 on the original blade web, and a second circular hole is provided at the position of the connection coupling 107 on the extended section web. Because the positions of the first circular hole and the second circular hole correspond, the connection fastener 103 of the original blade web is fastened to the first circular hole after passing through the original blade web and the connection coupling 104 of the original blade web by bolt fastening.

[0030] Among them, the extension section web connecting fastener 108 passes through the extension section web in sequence along the number of circular holes, and the second circular hole on the connecting coupling 107 of the extension section web is fastened and connected with the first circular hole of the connecting coupling 104 on the original blade web. At the same time, an original blade buffer washer 102 is arranged between the original blade web connecting fastener 103 and the original blade web. The buffer washer 102 protects the surface of the connected part from being scratched by the surface of the connecting part during the fastening process, disperses the pressure of the nut on the connecting part, improves friction, and seals. At the same time, the gasket also has the function of preventing loosening. The connecting fastener 103 of the original blade web passes through the original blade buffer washer 102 and the extension section web in sequence. Because an extension section is arranged between the connecting fastener 108 of the extension section web and the extension section web, the connecting fastener 108 of the extension section web will pass through the extension section buffer washer 102 and the extension section web in sequence. Because the connecting coupling 104 of the original blade web is connected with a positioning piece 105, and a positioning hole is provided on the connecting coupling of the extended section web, during installation, the positioning piece 105 is inserted into the positioning hole to play a role of fixed installation, and is used to stabilize the hinge of the original blade web and the extended section web. In order to increase the toughness of the connection between the extended section web and the original blade web, a spiral spring piece 106 is knotted on the positioning piece between the original blade web connecting coupling 104 and the extended section web connecting coupling 107.

[0031] Specifically, the connecting coupling 107 of the extension section web is pre-bonded to the extension section web by the sealing strip glue 110. After the extension section is installed, the anti-falling device installation hole 111 can be used as a reference according to the actual installation position of the extension section, and the approximate position of the coupling installation hole can be found after the extension section web. First, a small hole is drilled, and then according to the actual position of the extension section web coupling 107, the extension section web installation hole is drilled with a drilling machine. Structural adhesive is applied to the surface of the extension section web connecting coupling 107 that contacts the web through the extension section web installation hole, and the limiting fastener is loosened to rely on the force of the spring to make the extension section web connecting coupling 107 contact and be compressed with the web. After coating the surface-treated extension section web connecting fasteners 108 and the extension section web buffer gasket 102 with structural adhesive, follow the steps below. Figure 1 Assemble. Install the extension section web fastener reinforcement assembly 101. Structural adhesive can be used for caulking, and glass cloth mixed with epoxy resin can be used for bonding and reinforcement.

[0032] Example 2

[0033] Reference Figure 1-6 The second embodiment of the present invention provides a wind turbine blade extension structure and installation method.

[0034] Specifically, when the web connecting fastener 108 of the extension section is connected, a fastener anchor bolt 109 of the web of the extension section is provided, and the web connecting fastener 103 of the original blade is provided with the web fastener reinforcement group 101 of the original blade. At the same time, the fastener anchor bolt 109 and the connecting fastener 103 of the original blade form a symmetrical device, which can prevent the web of the original blade and the web of the extension section from falling off due to the strong wind force when the wind blows and rotates, and plays a role in preventing the web from falling off, because the web of the original blade and the web of the extension section are both equipped with "anchor"-shaped parts, and the structural shape of the anchor is a semicircle at the bottom, and there is an upward straight line at the center point of the semicircle, connecting the bottom of the semicircle to form a "T"-shaped part, which can firmly clamp the web of the original blade and the web of the extension section, and an anti-falling device is also provided on the extension section, which is easy to disassemble. In order to increase the blade's reasonable adaptation and utilization of wind speed and wind direction, increase the rotation speed, and reduce the opponent's resistance, the extension web is designed as a variable cross-section piece, and the blade shape is wing-shaped. In order to prevent lightning from striking the blades, the material of the extension section belly plate is carbon fiber composite material to reduce conductivity. The reason why the extension section belly plate is made of carbon fiber composite material is that carbon fiber composite material also has the function of anti-corrosion and water-insoluble, which can make the blade play the role of anti-corrosion protection. In addition, the buffer gasket can reduce the stress concentration on the original blade belly plate. Equipped with an extension section buffer gasket to reduce the stress concentration on the extension section belly plate. The position tolerance of the belly plate manufactured for different blades is adjusted by the connecting rod. The installation hole of the anti-falling device can be processed in advance according to different blades, or it can be processed on site.

[0035] In summary, the technology of wind turbine blade extension structure and installation method increases the safety factor and is convenient, fast and reliable to operate. Extended blades are added to the original wind turbine blades to increase wind contact, and the flat and arc shapes improve production efficiency.

[0036] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0037] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0038] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wind turbine blade extension structure and installation method, characterized in that: include, The original blade web connecting fastener (103), the original blade web connecting coupling (104), the extended section web connecting coupling (107), and the extended section web connecting fastener (108), wherein the original blade web connecting coupling (104) is provided with a first circular hole, and the extended section web connecting coupling (107) is provided with a second circular hole, and the positions of the first circular hole and the second circular hole are corresponding to each other, and after the original blade web connecting fastener (103) passes through the original blade web coupling (104), it is fastened and connected to the first circular hole of the original blade web connecting coupling (104).

2. The wind turbine blade extension structure and installation method according to claim 1, characterized in that: The extension section web connecting fastener (108) passes through the extension section web and the second circular hole of the extension section web connecting coupling (107) in sequence and is then fastened to the first circular hole of the original blade web connecting coupling (104).

3. The wind turbine blade extension structure and installation method according to claim 2, characterized in that: An original blade buffer washer (102) is arranged between the original blade web connecting fastener (103) and the original blade web, and the original blade web connecting fastener (103) passes through the original blade buffer washer (102) and the original blade web in sequence.

4. The wind turbine blade extension structure and installation method according to claim 3, characterized in that: An extension section is arranged between the extension section web plate connecting fastener (108) and the extension section web plate, and the extension section web plate connecting fastener (108) passes through the extension section buffer washer (102) and the extension section web plate in sequence.

5. The wind turbine blade extension structure and installation method according to claim 4, characterized in that: The original blade web connecting coupling (104) is connected with a positioning piece (105), the extended section web connecting coupling (107) is provided with a positioning hole, the positioning piece (105) is inserted into the positioning hole, and a spiral spring (106) is sleeved on the positioning piece located between the original blade web connecting coupling (104) and the extended section web connecting coupling (107).

6. The wind turbine blade extension structure and installation method according to claim 5, characterized in that The extension section web connecting coupling 107 is pre-bonded to the extension section web by means of sealing strip glue (110).

7. The wind turbine blade extension structure and installation method according to claim 6, characterized in that: The extended section web connecting fastener (108) is provided with an extended section web fastener anchor bolt (109), and the original blade web connecting bolt (103) is provided with an original blade web fastener reinforcement group (101).

8. The wind turbine blade extension structure and installation method according to claim 7, characterized in that: The extension section is provided with an anti-falling device installation hole (111).

9. The wind turbine blade extension structure and installation method according to claim 6, characterized in that: The extended section web is a variable cross-section blade in the shape of a wing.

10. The wind turbine blade extension structure and installation method according to claim 9, characterized in that: The material of the extended section web is carbon fiber composite material.

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