Extension device of wind wheel blade

Abstract

The embodiment of the utility model provides an extension device of a wind wheel blade, which comprises two oppositely arranged clamping mechanisms, a fastening mechanism is arranged between the two oppositely arranged clamping mechanisms, the fastening mechanism is used for pulling the two clamping mechanisms together, and the two clamping mechanisms are used for fastening an extension plate on the wind wheel blade. According to the extension device of the wind wheel blade, the blade tip extension operation can be directly carried out on the premise that a fan under the blade is not disassembled, and prefabricated extension plates (suction surface and pressure surface parts) are fixed to the corresponding positions of the operation tool; and after the structural adhesive is filled and coated, extension plates (a suction surface and a pressure surface) are bonded and then the tool is fixed, and after the structural adhesive is cured, the device is disassembled for polishing, shaping and the like, so that extension operation of the wind wheel blade can be completed.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine blade technology, and in particular relates to a wind turbine blade extension device. Background Technology

[0002] Existing methods for extending blade tips mainly involve connecting and fixing pre-fabricated blade tips to the blade body to be extended using various techniques. Some blades to be extended retain their original tips, while most involve cutting off the tip before extension. These methods often require drilling holes, making the process cumbersome, reducing blade strength, and increasing structural safety risks.

[0003] The patented blade tip extension structure for wind turbine blades (CN218325088U) mainly involves cutting off the tip section of the original blade and then bonding a new tip to the bonding section of the original blade. No holes are drilled at the bonding area to avoid reducing the connection strength between the new tip and the blade root section. The pressure-side shell and suction-side shell of the new tip are separate structures with good compatibility between components. They can be installed in stages, reducing the difficulty of installation and improving the tightness and strength of the bond. However, there is currently no corresponding installation fixture, making it difficult to fix the pressure-side shell and suction-side shell of the new tip during the bonding process. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the purpose of this utility model embodiment is to provide a wind turbine blade extension device.

[0005] The technical solution adopted in this embodiment of the utility model is a wind turbine blade extension device, including two opposing clamping mechanisms, and a fastening mechanism is provided between the two opposing clamping mechanisms. The fastening mechanism is used to pull the two clamping mechanisms together, and the two clamping mechanisms are used to fasten the extension plate to the wind turbine blade.

[0006] Furthermore, the clamping mechanism includes a first clamping plate, and the first clamping plates on the two clamping mechanisms are arranged opposite to each other.

[0007] Furthermore, the clamping mechanism also includes a second clamping plate, and the two second clamping plates on the clamping mechanism are arranged opposite to each other.

[0008] Furthermore, the fastening mechanism includes bolt holes and bolts. Bolt holes are provided at both ends of the first clamping plate and the second clamping plate, and bolts are provided at both ends of the first clamping plate and the second clamping plate that are arranged opposite to each other. The bolts cooperate with the bolt holes to fasten the bolts located on the first clamping plate and the second clamping plate respectively to bring the two oppositely arranged first clamping plates and the two oppositely arranged second clamping plates closer together and clamp them tightly.

[0009] Furthermore, the second clamping plate on each of the clamping mechanisms is movably connected to the first clamping plate.

[0010] Furthermore, a connector is provided between the second clamping plate and the first clamping plate on the clamping mechanism. The connector includes a connecting arm and a rotating shaft. The rotating shaft is mounted on the first clamping plate, one end of the connecting arm is connected to the rotating shaft, and the other end of the connecting arm is connected to the second clamping plate.

[0011] Furthermore, the opposing sides of the two first clamping plates and the two second clamping plates are constructed as concave curved surfaces.

[0012] Furthermore, connecting keys are installed on opposite sides of the two first clamping plates, which are arranged opposite each other. The connecting keys are used to temporarily fix the extension plate to the first clamping plates.

[0013] Furthermore, it also includes a positioning component, which includes a groove and a slider, the slider being placed in the groove, and the groove and the slider being fixed to one of the two first clamping plates respectively.

[0014] Compared with the prior art, the wind turbine blade extension device proposed in this utility model can directly perform blade tip extension without disassembling the wind turbine. The prefabricated extension plate (suction surface and pressure surface) is fixed in the corresponding position on the operating fixture. After applying structural adhesive, the extension plate (suction surface and pressure surface) is bonded together and the fixture is fixed. After the structural adhesive cures, the device is removed and the wind turbine blade is polished, reshaped and other processes are performed to complete the wind turbine blade extension.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit the present invention.

[0016] The overview of various implementations or examples of the technology described in this utility model is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0017] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the utility model. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0018] Fig. 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0019] Fig. 2 This is a partial enlarged view of an embodiment of the present utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0023] See Figs. 1-2 This utility model provides a device for extending wind turbine blades, including two opposing clamping mechanisms and a fastening mechanism between them. The fastening mechanism is used to pull the clamping mechanisms together, and the two clamping mechanisms are used to fasten the extension plate to the wind turbine blade. This technical solution allows for blade tip extension without disassembling the wind turbine blade. In use, a pre-fabricated extension plate (suction and pressure surfaces) is fixed to the corresponding position on the operating fixture. After applying structural adhesive, the extension plate (suction and pressure surfaces) is bonded together and the fixture is fixed. After the structural adhesive cures, the device is removed for grinding, shaping, and other processing to complete the wind turbine blade extension operation.

[0024] The clamping mechanism includes a first clamping plate 1, and the two clamping plates 1 on the clamping mechanism are arranged opposite to each other. When fixed, the first clamping plates 1 are arranged opposite to each other to clamp and fix the tail end of the extension plate (suction surface and pressure surface) to the tip of the blade to be extended.

[0025] The clamping mechanism also includes a second clamping plate 2, and the two second clamping plates 2 on the clamping mechanism are arranged opposite to each other. When fixed, the opposite arrangement of the second clamping plates 2 clamps and fixes the front end of the extension plate (suction surface and pressure surface).

[0026] The fastening mechanism includes bolt holes 3 and bolts 4. Bolt holes 3 are provided at both ends of the first clamping plate 1 and the second clamping plate 2, and bolts 4 are provided at both ends of the oppositely arranged first clamping plates 1 and the second clamping plates 2. The bolts 4 cooperate with the bolt holes 3 to fasten the bolts 4 located on the first clamping plates 1 and the second clamping plates 2 respectively, so as to bring the two oppositely arranged first clamping plates 1 and the two oppositely arranged second clamping plates 2 together. The cooperation of bolts 4 and bolt holes 3 brings the oppositely arranged first clamping plates 1 and the oppositely arranged second clamping plates 2 together, keeping the extension plate (suction surface and pressure surface) stably clamped, thereby waiting for the structural adhesive to cure.

[0027] The second clamping plate 2 on each of the clamping mechanisms is movably connected to the first clamping plate 1. The movable connection of the second clamping plate 2 to the first clamping plate 1 facilitates the fixing operation. There is no need to remove the first clamping plate 1 and the second clamping plate 2 separately. After fixing the first clamping plate 1, the second clamping plate 2 can be rotated to the front end of the extension plate (suction surface and pressure surface) for clamping and fixing, which is convenient for operation.

[0028] Specifically, a connector is provided between the second clamping plate 2 and the first clamping plate 1 on the clamping mechanism. The connector includes a connecting arm 5 and a rotating shaft 6. The rotating shaft 6 is mounted on the first clamping plate 1. One end of the connecting arm 5 is connected to the rotating shaft 6, and the other end of the connecting arm 5 is connected to the second clamping plate 2.

[0029] The opposing sides of the two first clamping plates 1 and the two second clamping plates 2 are constructed as concave curved surfaces. The concave curved surfaces of the first clamping plates 1 and the second clamping plates 2 are in direct contact with the extension plate (suction surface and pressure surface). The concave curved surfaces are conformal curved surfaces that fit the extension plate with the clamping position, which can fit the surface of the extension plate for clamping, and help to stably adhere and fix the extension plate to the tip of the blade to be extended.

[0030] Connecting keys 7 are installed on opposite sides of the two first clamping plates 1, which are arranged opposite to each other. The connecting keys 7 are used to temporarily fix the extension plate to the first clamping plate 1.

[0031] It also includes a positioning component, which comprises a groove 8 and a slider. The slider is placed within the groove 8, and the groove 8 and the slider are respectively fixed to one of the two first clamping plates 1. The cooperation between the groove 8 and the slider is used to maintain alignment and prevent displacement when the fastening mechanism pulls the clamping mechanism together.

[0032] Specific action process:

[0033] Set the blade to be extended into a vertically downward working position and keep it stable. Install the first clamping plate 1 at the corresponding position on the extension plate (suction surface and pressure surface), and connect it with a fastening mechanism and apply a certain pre-tightening force. Then, temporarily connect the suction surface and pressure surface of the extension plate to the first clamping plate 1 through the connecting key 7. Next, apply structural adhesive to the extension plate (suction surface and pressure surface) according to the actual process requirements. Then, use the fastening mechanism to push the first clamping plate 1 to slide along the slide groove 8 to the clamping state. Then, rotate the connecting arm 5 around the rotating shaft 6 and press the second clamping plate 2 against the extension plate. Use the fastening mechanism to fix the relatively set second clamping plate 2. After holding it for a period of time, release the connection key 7 to the extension plate, and then remove the device. After that, grind and shape the extension plate to complete the blade tip extension work.

[0034] The above description is intended to be illustrative and not restrictive. Those skilled in the art can make variations, modifications, substitutions, and alterations to the above embodiments within the scope of this disclosure. Moreover, the above examples (or one or more of them) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A device for extending wind turbine blades, characterized in that, It includes two opposing clamping mechanisms, and a fastening mechanism is provided between the two opposing clamping mechanisms. The fastening mechanism is used to pull the two clamping mechanisms together, and the two clamping mechanisms are used to fasten the extension plate to the wind turbine blade.

2. The wind turbine blade extension device according to claim 1, characterized in that, The clamping mechanism includes a first clamping plate (1), and the first clamping plates (1) on the two clamping mechanisms are arranged opposite to each other.

3. The wind turbine blade extension device according to claim 2, characterized in that, The clamping mechanism further includes a second clamping plate (2), and the second clamping plates (2) on the two clamping mechanisms are arranged opposite to each other.

4. The wind turbine blade extension device according to claim 3, characterized in that, The fastening mechanism includes bolt holes (3) and bolts (4). Bolt holes (3) are provided at both ends of the first clamping plate (1) and the second clamping plate (2). Bolts (4) are provided at both ends of the first clamping plate (1) and the second clamping plate (2) which are arranged opposite to each other. The bolts (4) cooperate with the bolt holes (3) to fasten the bolts (4) located on the first clamping plate (1) and the second clamping plate (2) respectively to bring the two oppositely arranged first clamping plates (1) and the two oppositely arranged second clamping plates (2) together.

5. The wind turbine blade extension device according to claim 4, characterized in that, The second clamping plate (2) on each of the clamping mechanisms is movably connected to the first clamping plate (1).

6. The wind turbine blade extension device according to claim 5, characterized in that, A connector is provided between the second clamping plate (2) and the first clamping plate (1) of the clamping mechanism. The connector includes a connecting arm (5) and a rotating shaft (6). The rotating shaft (6) is mounted on the first clamping plate (1). One end of the connecting arm (5) is connected to the rotating shaft (6), and the other end of the connecting arm (5) is connected to the second clamping plate (2).

7. The wind turbine blade extension device according to claim 3, characterized in that, The opposing sides of the two first clamping plates (1) and the two second clamping plates (2) are constructed as concave curved surfaces.

8. The wind turbine blade extension device according to claim 2, characterized in that, Connecting keys (7) are installed on opposite sides of the two first clamping plates (1) which are set opposite to each other. The connecting keys (7) are used to temporarily fix the extension plate to the first clamping plate (1).

9. The wind turbine blade extension device according to claim 2, characterized in that, It also includes a positioning component, which includes a groove (8) and a slider, the slider being placed in the groove (8), and the groove (8) and the slider being fixed to one of the two first clamps (1).

Images