Wind power blade damage monitoring device based on acoustic emission technology

Abstract

The utility model belongs to the field of wind power, particularly relates to a wind power blade damage monitoring device based on an acoustic emission technology, and provides the following scheme aiming at the problems that an existing blade damage monitor is usually fixed on a carrier by using a plurality of bolts, is inconvenient to mount and dismount, and is not favorable for later maintenance: the wind power blade damage monitoring device comprises a blade damage monitor, mounting plates are fixedly arranged on the four sides of the blade damage monitor, and positioning grooves are formed in one sides of the mounting plates; the blade damage monitoring device further comprises a base, the base is located at the bottom of the blade damage monitoring device, two fixed plates are fixedly arranged on the surface of the base, two sliding grooves are formed in the surface of the base, movable plates are connected into the sliding grooves in a sliding mode, and the fixed plates and the movable plates are matched with the positioning grooves. And convenience is provided for later maintenance, the insertion blocks can be conveniently adjusted, and abrasion to the structure caused by friction is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, in particular to a wind turbine blade damage monitoring device based on acoustic emission technology. Background Technique

[0002] When materials or components generate deformation or cracks during the stress process, the phenomenon of releasing strain energy in the form of elastic waves is called acoustic emission. The technology of using the received acoustic emission signals to perform dynamic non-destructive testing on materials or components is called acoustic emission technology.

[0003] The blades of wind turbines are the main components of wind power equipment. Since the blades are located at high altitudes and are inconvenient to maintain, it is necessary to monitor the damage of the blades and perform unified maintenance when the damage reaches a certain level. However, the existing monitoring devices have the following deficiencies during maintenance.

[0004] 1. The blade damage monitor is usually fixed on the carrier by multiple bolts, which is inconvenient for installation and disassembly and is not conducive to later maintenance.

[0005] Therefore, we propose a wind turbine blade damage monitoring device based on acoustic emission technology. Content of the Utility Model

[0006] The purpose of the utility model is to solve the defect that the blade damage monitor in the prior art is usually fixed on the carrier by multiple bolts, which is inconvenient for installation and disassembly and is not conducive to later maintenance, and to propose a wind turbine blade damage monitoring device based on acoustic emission technology.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A wind turbine blade damage monitoring device based on acoustic emission technology, comprising:

[0009] A blade damage monitor, installation plates are fixedly arranged on four sides of the blade damage monitor, and positioning grooves are respectively arranged on one sides of the installation plates;

[0010] It further includes a base, the base is located at the bottom of the blade damage monitor, two fixing plates are fixedly arranged on the surface of the base, two sliding grooves are arranged on the surface of the base, moving plates are respectively and slidably connected in the sliding grooves, the fixing plates and the moving plates are respectively matched with the positioning grooves, and two limiting grooves are respectively arranged on the bottoms of the moving plates;

[0011] An installation groove is arranged at the bottom of the base, and two rectangular holes communicating with each other are respectively arranged between the two sliding grooves and the installation groove;

[0012] A limiting mechanism, the limiting mechanism is arranged in the installation groove and is used for limiting the moving plates.

[0013] In a possible design, the limiting mechanism includes a bidirectional lead screw, two push plates and four insertion blocks. The bidirectional lead screw rotatably penetrates through one side of the installation groove. The two push plates are both slidably connected between the inner walls on both sides of the installation groove. The bidirectional lead screw threadedly penetrates through the two push plates. The four insertion blocks respectively slidably penetrate through the four rectangular holes. Springs are fixedly arranged between the insertion blocks and the installation groove. The insertion blocks are matched with the limiting grooves, and the push plates are matched with the insertion blocks.

[0014] In a possible design, limiting blocks are fixedly arranged on the inner walls on both sides of the installation groove. The limiting blocks are matched with the insertion blocks.

[0015] In a possible design, rollers are rotatably connected to the bottom ends of the insertion blocks.

[0016] In a possible design, bevels are arranged at both ends of the fixing plate.

[0017] In a possible design, a plurality of through assembly holes are formed on the surface of the base.

[0018] In this application, during installation, place the blade damage monitor on the surface of the base so that the mounting plate and the fixing plate are butted. Then put the moving plate into the sliding groove so that the mounting plate and the moving plate are butted. Then rotate the bidirectional lead screw to drive the push plate to move. The push plate contacts and pushes the roller and the insertion block to rise. The top end of the insertion block enters the limiting groove to complete the limitation of the moving plate, and thus complete the installation of the blade damage monitor.

[0019] During disassembly, rotate the bidirectional lead screw to drive the push plate away from the insertion block. The spring pushes the insertion block to descend and disengage from the limiting groove. Then move the moving plate out of the sliding groove. Then the blade damage monitor can be removed.

[0020] Beneficial effects:

[0021] In the present utility model, for the wind turbine blade damage monitoring device based on acoustic emission technology, through the arrangement of multiple structures such as the fixing plate, the moving plate and the insertion block, the blade damage monitor can be quickly installed and disassembled, which provides convenience for later maintenance.

[0022] In the present utility model, for the wind turbine blade damage monitoring device based on acoustic emission technology, through the arrangement of the rollers, the friction when the structures contact each other can be reduced, the wear caused by the friction is reduced, and it is convenient to adjust the insertion block.

[0023] In the present utility model, the blade damage monitor can be quickly installed and disassembled, which provides convenience for later maintenance. It is also convenient to adjust the insertion block, and the wear of the structure caused by the friction is reduced. Description of the Drawings

[0024] Figure 13D structural schematic diagram of a wind turbine blade damage monitoring device based on acoustic emission technology proposed by the present utility model;

[0025] Figure 2 Schematic diagram of the mounting plate, positioning groove, fixing plate and bevel structure of a wind turbine blade damage monitoring device based on acoustic emission technology proposed by the present utility model;

[0026] Figure 3 Partial sectional structural schematic diagram of a wind turbine blade damage monitoring device based on acoustic emission technology proposed by the present utility model;

[0027] Figure 4 Enlarged structural schematic diagram of point A of a wind turbine blade damage monitoring device based on acoustic emission technology proposed by the present utility model.

[0028] In the figure: 1. Blade damage monitor; 2. Mounting plate; 3. Base; 4. Fixing plate; 5. Chute; 6. Moving plate; 7. Assembly hole; 8. Positioning groove; 9. Bevel; 10. Installation groove; 11. Limit block; 12. Bidirectional lead screw; 13. Push plate; 14. Limit groove; 15. Insert block; 16. Roller; 17. Spring; 18. Rectangular hole. Detailed implementation method

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0030] Embodiment 1

[0031] Refer to Figures 1 - 4 , a monitoring device, including:

[0032] A blade damage monitor 1 for monitoring the acoustic emission signal of a wind turbine blade to determine whether there is damage to the blade. The structure and principle of the blade damage monitor 1 are the same as those of the patent with the publication number CN208969049U, so the structure and principle will not be described in detail. Mounting plates 2 are fixedly provided on all four sides of the blade damage monitor 1, and positioning grooves 8 are opened on one side of each mounting plate 2;

[0033] It also includes a base 3. The base 3 is located at the bottom of the blade damage monitor 1. Two fixing plates 4 are fixedly provided on the surface of the base 3. Two chutes 5 are opened on the surface of the base 3. Moving plates 6 are slidably connected in the chutes 5. The fixing plates 4 and the moving plates 6 are both matched with the positioning grooves 8 for positioning the blade damage monitor 1. Two limit grooves 14 are opened at the bottom of each moving plate 6;

[0034] An installation groove 10 is opened at the bottom of the base 3. Two communication rectangular holes 18 are opened between the two chutes 5 and the installation groove 10;

[0035] The limiting mechanism is arranged in the mounting groove 10 and is used for limiting the movable plate 6. The limiting mechanism includes a bidirectional screw 12, two push plates 13 and four plug blocks 15. The bidirectional screw 12 rotates and passes through one side of the mounting groove 10. The two push plates 13 are slidably connected between the inner walls on both sides of the mounting groove 10. The bidirectional screw 12 threads through the two push plates 13 and is used to adjust the push plates 13 to move closer to or away from each other. The four plug blocks 15 slide through the four rectangular holes 18 respectively. A spring 17 is fixed between the plug block 15 and the mounting groove 10. The plug block 15 cooperates with the limiting groove 14 to limit the movable plate 6. The push plate 13 and the plug block 15 cooperate to adjust the movement of the plug block 15.

[0036] The present application can be used in the wind power field, and can also be used in other fields applicable to the present application.

[0037] Example 2

[0038] A wind turbine blade damage monitoring device based on acoustic emission technology improved on the basis of Example 1 is applied to the wind power field;

[0039] In another aspect of this embodiment, limit blocks 11 are fixedly provided on the inner walls of both sides of the installation groove 10. The limit blocks 11 cooperate with the plug block 15 to limit the movement of the plug block 15 and prevent the plug block 15 from escaping from the rectangular hole 18.

[0040] In another aspect of this embodiment, the bottom end of the insert block 15 is rotatably connected to a roller 16 , which can facilitate the push plate 13 to push the insert block 15 to move, thereby reducing the loss of the push plate 13 and the insert block 15 .

[0041] In another aspect of this embodiment, both ends of the fixed plate 4 are provided with bevel edges 9, which can facilitate the docking of the installation plate 2 with the fixed plate 4 and the movable plate 6.

[0042] In another aspect of this embodiment, a plurality of through-holes 7 are provided on the surface of the base 3 for mounting the base 3 on a corresponding carrier, and during maintenance, only the blade damage monitor 1 needs to be installed and disassembled.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wind turbine blade damage monitoring device based on acoustic emission technology, characterized in that: include: A blade damage monitor (1), wherein four sides of the blade damage monitor (1) are fixedly provided with mounting plates (2), and one side of the mounting plates (2) is provided with positioning grooves (8); It also comprises a base (3), the base (3) being located at the bottom of the blade damage monitor (1), two fixed plates (4) being fixedly arranged on the surface of the base (3), two slide grooves (5) being provided on the surface of the base (3), movable plates (6) being slidably connected in the slide grooves (5), the fixed plates (4) and the movable plates (6) both being matched with the positioning grooves (8), and two limit grooves (14) being provided at the bottom of the movable plates (6); The bottom of the base (3) is provided with a mounting groove (10), and two communicating rectangular holes (18) are provided between the two slide grooves (5) and the mounting groove (10); A limiting mechanism is arranged in the installation groove (10) and is used to limit the movable plate (6).

2. According to claim 1, a wind turbine blade damage monitoring device based on acoustic emission technology is characterized in that: The limiting mechanism comprises a bidirectional screw (12), two push plates (13) and four insert blocks (15); the bidirectional screw (12) rotates and passes through one side of the mounting groove (10); the two push plates (13) are slidably connected between the inner walls of the mounting groove (10); the bidirectional screw (12) threads through the two push plates (13); the four insert blocks (15) respectively slide through four rectangular holes (18); a spring (17) is fixed between the insert block (15) and the mounting groove (10); the insert block (15) and the limiting groove (14) cooperate with each other; the push plate (13) and the insert block (15) cooperate with each other.

3. The wind turbine blade damage monitoring device based on acoustic emission technology according to claim 2 is characterized in that: Limit blocks (11) are fixedly arranged on the inner walls of both sides of the installation groove (10), and the limit blocks (11) and the insert blocks (15) cooperate with each other.

4. The wind turbine blade damage monitoring device based on acoustic emission technology according to claim 3 is characterized in that: The bottom ends of the insert blocks (15) are rotatably connected to rollers (16).

5. The wind turbine blade damage monitoring device based on acoustic emission technology according to claim 4 is characterized in that: Both ends of the fixing plate (4) are provided with bevel edges (9).

6. The wind turbine blade damage monitoring device based on acoustic emission technology according to claim 5 is characterized in that: The surface of the base (3) is provided with a plurality of penetrating assembly holes (7).

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