Wind turbine generator tower stress state monitoring device

Abstract

The utility model provides a wind turbine generator tower stress state monitoring device which comprises tower bodies, cross beams are arranged at the splicing positions of every two adjacent tower bodies, monitoring mechanisms and limiting mechanisms are arranged on the edges of the inner walls of the tower bodies respectively, the monitoring mechanisms and the limiting mechanisms are distributed between the cross beams in a staggered mode, and the cross beams are connected with the monitoring mechanisms. And first stress sensors are arranged on the monitoring mechanism and the cross beam. The stress change is monitored at the splicing position of the tower body, the first stress sensor is installed through the monitoring mechanism, follow-up installation can be conducted on the inner wall of an original tower barrel, and stable installation of the first stress sensor can be achieved through cooperation of the monitoring mechanism and the limiting mechanism; when the tower tube works, the state change can be monitored through the surrounding first stress sensors, the stable performance between the tower bodies is achieved in cooperation with the cross beams, effective monitoring is conducted when bending changes occur, the monitoring effect is improved, and normal and stable operation of the wind turbine generator tower tube is ensured.

Description

Technical Field

[0001] This utility model relates to a stress state monitoring device for wind turbine towers, belonging to the technical field of wind turbine towers. Background Technology

[0002] Wind turbine towers, also known as wind power towers, are the towers used in wind power generation. They primarily serve a supporting role in wind turbine generators and absorb vibrations from the generator. The general manufacturing process for wind turbine towers is as follows: CNC cutting machine cuts the material; thick plates require beveling; after the plate is rolled into shape by a plate rolling machine, spot welding is performed; positioning is completed; after confirmation, the inner and outer longitudinal seams are welded; roundness is checked, and if there are any problems, a second rounding is performed; after the welding of a single section of the tower is completed, hydraulic assembly roller frames are used for assembly and spot welding; the inner and outer circumferential seams are welded; straightness and other tolerances are checked; after the flanges are welded, non-destructive testing and flatness checks are performed on the welds; after sandblasting and painting, the internal components are installed and the finished product is inspected before being transported to the installation site.

[0003] The wind turbine tower bears the weight of the nacelle, blades, and other components, ensuring the stable operation of the entire wind turbine. Wind turbine towers are usually composed of multiple interconnected parts, which makes the joints prone to tilting and bending due to external factors. In severe cases, this may lead to the inability to support the weight of the nacelle and blades. Furthermore, the axial force of the wind at the assembly points causes the internal stress to be constantly changing, which can easily lead to loosening of the connections over time, affecting the service life of the wind turbine tower. Utility Model Content

[0004] This invention provides a wind turbine tower stress state monitoring device to address the technical problem of poor monitoring performance of wind turbine towers.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a wind turbine tower stress state monitoring device, comprising:

[0007] The tower body is spliced ​​together to form the main tower of the wind turbine. A crossbeam is provided at the splicing point of two adjacent tower bodies. A monitoring mechanism and a limiting mechanism are respectively provided on the inner wall edge of the tower body. The monitoring mechanism and the limiting mechanism are distributed alternately between the crossbeams, and a first stress sensor is provided on both the monitoring mechanism and the crossbeam.

[0008] In this technical solution, both ends of the tower body are fixedly connected to the sealing plate, and the edge of the sealing plate is provided with an opening for the installation of the ladder, and the ladder is fixedly connected to the inner wall of the tower body.

[0009] In this technical solution, crossbeams are fixedly installed at both ends of the tower body. The crossbeams have a cross-shaped structure, and two crossbeams at adjacent tower bodies are spliced ​​together.

[0010] In this technical solution, several evenly distributed mounting holes are provided on both ends of the tower body, and the mounting holes at both ends of adjacent tower bodies are correspondingly distributed.

[0011] In this technical solution, the monitoring mechanism is composed of a limiting block, which is fixedly connected to the inner wall of the tower body. The middle part of the limiting block is threadedly connected to a bolt, and the end of the bolt is rotatably connected to a push block.

[0012] In this technical solution, the limiting block is a U-shaped structure and is set at both ends of the tower body. The limiting block has a movable block slidably connected inside, and the movable block is distributed correspondingly with the push block. The movable block is also in close contact with the inner wall of the tower body.

[0013] In this technical solution, the movable block has a T-shaped cross-section, and the middle and two ends of the movable block are fixedly connected to the first stress sensor and the positioning sleeve, respectively, and the positioning sleeve is symmetrically distributed on both sides of the first stress sensor.

[0014] In this technical solution, the limiting mechanism includes a fixed block, which is fixedly connected to the inner wall of the tower body, and the fixed block is distributed correspondingly to the movable blocks on the adjacent tower body.

[0015] In this technical solution, the surface of the fixing block is fixedly connected to the second stress sensor, the second stress sensor is connected to the guide rod, and the guide rod is fitted and inserted into the positioning sleeve.

[0016] In this technical solution, the surface of the crossbeam is provided with a number of evenly distributed positioning holes, the positioning holes on the spliced ​​crossbeams are correspondingly distributed, and a first stress sensor is embedded in the positioning hole.

[0017] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0018] The positive and progressive effects of this utility model are as follows:

[0019] The aforementioned wind turbine tower stress state monitoring device monitors stress changes at the splicing points of the tower bodies. A first stress sensor is installed via a monitoring mechanism, allowing for subsequent installation on the existing tower inner wall. It also works in conjunction with a limiting mechanism to ensure the stable installation of the first stress sensor. During tower operation, the device monitors state changes via surrounding first stress sensors and works with crossbeams to achieve stability between tower bodies. First stress sensors are also arranged on the crossbeams, enabling monitoring at all assembly points to ensure comprehensive monitoring. Effective monitoring is also conducted when bending changes occur, improving monitoring effectiveness and ensuring the normal and stable operation of the wind turbine tower. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model in half section.

[0022] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Tower body; 2. Mounting hole; 3. Sealing plate; 4. Ladder; 5. Limiting block; 6. Bolt; 7. Push block; 8. Movable block; 9. First stress sensor; 10. Positioning sleeve; 11. Fixing block; 12. Second stress sensor; 13. Guide rod; 14. Crossbeam; 15. Positioning hole. Detailed Implementation

[0025] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments described herein.

[0026] like Figure 1-3 As shown, the wind turbine tower stress state monitoring device includes:

[0027] Tower body 1, which is spliced ​​together to form the main tower of wind turbine. A crossbeam 14 is provided at the splicing point of two adjacent tower bodies 1. A monitoring mechanism and a limiting mechanism are respectively provided on the inner wall edge of the tower body 1. The monitoring mechanism and the limiting mechanism are staggered between the crossbeams 14, and a first stress sensor 9 is provided on the monitoring mechanism and the crossbeam 14.

[0028] Both ends of the tower body 1 are fixedly connected to the sealing plate 3. The edge of the sealing plate 3 has an opening for the installation of the ladder 4, and the ladder 4 is fixedly connected to the inner wall of the tower body 1.

[0029] Both ends of the tower body 1 are fixedly installed with crossbeams 14, which are cross-shaped structures. Two crossbeams 14 at adjacent tower bodies 1 are spliced ​​together. Several evenly distributed mounting holes 2 are opened on the edges of both ends of the tower body 1, and the mounting holes 2 at the ends of adjacent tower bodies 1 are distributed accordingly.

[0030] In this technical solution, the wind turbine tower is formed by splicing the tower bodies 1 together, and the tower body 1 is installed and fixed at the splicing position by fasteners inside the mounting holes 2, so as to ensure the stable splicing between adjacent tower bodies 1 and the overall appearance.

[0031] The monitoring mechanism consists of a limiting block 5, which is fixedly connected to the inner wall of the tower body 1. The middle part of the limiting block 5 is threadedly connected to a bolt 6, and the end of the bolt 6 is rotatably connected to a push block 7. The limiting block 5 has a U-shaped structure and is set at both ends of the tower body 1. A movable block 8 is slidably connected inside the limiting block 5. The movable block 8 is distributed correspondingly to the push block 7 and is fitted to the inner wall of the tower body 1. The movable block 8 has a T-shaped cross-section. The middle and both ends of the movable block 8 are fixedly connected to the first stress sensor 9 and the positioning sleeve 10, respectively. The positioning sleeve 10 is symmetrically distributed on both sides of the first stress sensor 9.

[0032] In this technical solution, the bolt 6 rotates to push the push block 7 to contact the movable block 8, and the limiting block 5 limits the movable block 8 to move stably. The movable block 8 drives the first stress sensor 9 on it to contact the fixed block 11, at which time the extrusion force is generated to realize stress monitoring, and at the same time, the positioning sleeve 10 is driven to be sleeved on the surface of the guide rod 13.

[0033] The limiting mechanism includes a fixed block 11, which is fixedly connected to the inner wall of the tower body 1, and the fixed block 11 is distributed correspondingly to the movable blocks 8 on the adjacent tower body 1; the surface of the fixed block 11 is fixedly connected to the second stress sensor 12, the second stress sensor 12 is connected to the guide rod 13, and the guide rod 13 is fitted and inserted into the positioning sleeve 10; the surface of the crossbeam 14 is provided with a plurality of evenly distributed positioning holes 15, the positioning holes 15 on the spliced ​​crossbeams 14 are correspondingly distributed, and the first stress sensor 9 is fitted and installed inside the positioning holes 15.

[0034] In this technical solution, when a change in profit occurs, the pressure signals received by multiple first stress sensors 9 on the tower body 1 change. At this time, the deformation of the tower body 1 is determined by analyzing each change in profit. At the same time, the first stress sensor 9 is also installed in the positioning hole 15 inside the crossbeam 14, which can realize comprehensive monitoring. When an adjacent tower body 1 bends, the guide rod 13 bends in the positioning sleeve 10, forcing the positioning sleeve 10 to generate shear stress. At this time, the data signal is monitored by the second stress sensor 12, which can improve the monitoring accuracy and facilitate real-time monitoring of the stress change state of the tower body 1.

[0035] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A wind turbine tower stress state monitoring device, characterized in that, The utility model relates to a wind turbine tower body, which comprises: The tower body (1) is mutually spliced to form a main tower drum of a wind turbine, and a cross beam (14) is arranged at the splicing position of each two adjacent tower bodies (1). Monitoring mechanisms and limiting mechanisms are arranged on the inner wall edges of the tower bodies (1) and staggered between the cross beams (14). First stress sensors (9) are arranged on the monitoring mechanisms and the cross beams (14).

2. The wind turbine tower stress monitoring apparatus of claim 1, wherein: The inner ends of the two ends of the tower body (1) are fixedly connected with end plates (3), and the end plates (3) are provided with openings for installing ladders (4) at the edges thereof. The ladders (4) are fixedly connected with the inner walls of the tower bodies (1).

3. The wind turbine tower stress monitoring apparatus of claim 1, wherein: Cross beams (14) are fixedly arranged at the two ends of the tower body (1). The cross beams (14) are cross-shaped structures, and the two cross beams (14) at the splicing position of each two adjacent tower bodies (1) are mutually spliced.

4. The wind turbine tower stress monitoring apparatus of claim 1, wherein: A plurality of mounting holes (2) are arranged at the edges of the two ends of the tower body (1) and are uniformly distributed. The mounting holes (2) at the two ends of each two adjacent tower bodies (1) are correspondingly distributed.

5. The wind turbine tower stress monitoring apparatus of claim 1, wherein: The monitoring mechanisms are composed of limiting blocks (5). The limiting blocks (5) are fixedly connected with the inner walls of the tower bodies (1). The limiting blocks (5) are threadedly connected with bolts (6) at the middle portions thereof, and the end portions of the bolts (6) are rotatably connected with push blocks (7).

6. The wind turbine tower stress monitoring apparatus of claim 5, wherein: The limiting blocks (5) are U-shaped structures arranged at the edges of the two ends of the tower bodies (1). The limiting blocks (5) are slidably connected with movable blocks (8) inside the limiting blocks (5). The movable blocks (8) are correspondingly distributed with the push blocks (7), and the movable blocks (8) are attached to the inner walls of the tower bodies (1).

7. The wind turbine tower stress monitoring apparatus of claim 6, wherein: The movable blocks (8) are T-shaped structures. The middle portions and the two ends of the movable blocks (8) are fixedly connected with first stress sensors (9) and positioning sleeves (10), respectively. The positioning sleeves (10) are symmetrically distributed on the two sides of the first stress sensors (9).

8. The wind turbine tower stress monitoring apparatus of claim 1, wherein: The limiting mechanisms comprise fixed blocks (11). The fixed blocks (11) are fixedly connected with the inner walls of the tower bodies (1). The fixed blocks (11) are correspondingly distributed with the movable blocks (8) on the adjacent tower bodies (1).

9. The wind turbine tower stress monitoring apparatus of claim 8, wherein: The surfaces of the fixed blocks (11) are fixedly connected with second stress sensors (12). The second stress sensors (12) are connected with guide rods (13), and the guide rods (13) are embeddedly inserted into the positioning sleeves (10).

10. The wind turbine tower stress monitoring apparatus of claim 3, wherein: The surfaces of the cross beams (14) are provided with a plurality of positioning holes (15) which are uniformly distributed. The positioning holes (15) on the spliced cross beams (14) are correspondingly distributed, and the first stress sensors (9) are embeddedly installed in the positioning holes (15).

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