Offshore wind plant sea wave monitoring device and monitoring method thereof

Abstract

The invention discloses an offshore wind plant sea wave monitoring device and a monitoring method thereof, and relates to the technical field of offshore wind turbine generators, the offshore wind plant sea wave monitoring device comprises a base, the upper portion of the base is connected with a lifting plate through a height adjusting mechanism, and the bottom of the lifting plate is provided with a monitoring mechanism; the monitoring mechanism comprises a monitor shell, a stress sensor, two guide shafts, a jacking plate, two reset springs, a ball rod fixedly connected to the outer wall of the center of the bottom of the jacking plate, a floating ball body fixedly connected to the outer wall of the bottom end of the ball rod and a controller fixedly installed on the outer wall of the top of the lifting plate. The servo motor drives the small bevel gear to rotate, then the large bevel gear engaged with the small bevel gear drives the vertical screw to rotate, and then the lifting plate in threaded connection with the vertical screw drives the whole monitoring mechanism to ascend and descend under the limitation of the lifting slide way, so that the height of the floating ball body can be flexibly adjusted; therefore, the sea level monitoring system can perform monitoring work in sea level areas with different heights.

Description

Technical Field

[0001] This invention relates to the field of offshore wind turbine technology, and in particular to an offshore wind farm wave monitoring device and its monitoring method. Background Technology

[0002] Under intense wave impact loads, structures located in the sea are prone to collapse and fatigue failure. Therefore, to improve the reliability of structures in wave environments, it is necessary to study the dynamic response of structures to wave impact loads through monitoring.

[0003] A search revealed that patent application number 202310096458.0 discloses a method and equipment for monitoring ocean waves in offshore wind farms, which includes the following steps: Step 1, collecting the impact force of sea surface waves on the turbine tower through a first monitoring agency to obtain first wave impact force data; Step 2, collecting the impact force of splashing waves and seawater currents through a second monitoring agency to obtain second wave impact force data; Step 3, receiving the first wave impact force data and the second wave impact force data through a controller, and comparing the first wave impact force data and the second wave impact force data with set values.

[0004] While the invention described above can quickly monitor the impact of sea waves on wind turbines, thereby enhancing the monitoring effect, the height of the buoy is not easily adjustable during its use, making it impossible to conduct effective monitoring in sea-level areas at different heights. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wave monitoring device and method for offshore wind farms, effectively solving the problem that existing technologies are not convenient for flexibly adjusting the height of the buoy, thus making it impossible to conduct effective monitoring in sea level areas at different heights.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wave monitoring device for offshore wind farms includes a base, an upper part of which is connected to a lifting plate via a height adjustment mechanism, and a monitoring mechanism is installed at the bottom of the lifting plate. The monitoring mechanism includes a monitor housing, a stress sensor fixedly installed on the inner top wall of the monitor housing, two guide shafts symmetrically fixed inside the monitor housing, a lifting plate slidably connected inside the monitor housing, two return springs sequentially sleeved on the lower part of the two guide shafts, a ball rod fixedly connected to the outer wall of the bottom center of the lifting plate, a float fixedly connected to the outer wall of the bottom end of the ball rod, and a controller fixedly installed on the outer top wall of the lifting plate. The height adjustment mechanism includes a servo driver, a fixed cover fixedly connected to the top outer wall of the base, a hollow column fixedly connected to the top outer wall of the fixed cover, and a vertical screw rotatably installed inside the hollow column and threadedly connected to the lifting plate.

[0007] As a preferred embodiment of the present invention, two linear bearings are fixedly embedded in the lifting plate, and the two linear bearings are movably connected to two guide shafts respectively.

[0008] As a preferred technical solution of the present invention, a movable hole is provided at the bottom center of the monitor housing, and the outer wall of the ball stick is slidably connected to the inner wall of the movable hole.

[0009] In a preferred embodiment of the present invention, the detection end of the stress sensor is in contact with the top of the lifting plate, and the stress sensor is electrically connected to the controller.

[0010] As a preferred technical solution of the present invention, the top outer wall of the monitor housing is welded with a plug rod, the bottom of the lifting plate is provided with a plug channel for mutual insertion, and the lifting plate is provided with a centering lock.

[0011] As a preferred technical solution of the present invention, the centering locking device includes a slide groove opened at the bottom of the lifting plate, a bidirectional screw rod rotatably installed in the slide groove, two locking rods symmetrically screwed to the two opposite threaded ends of the bidirectional screw rod, and a rotating cap fixedly connected to the outer wall of one end of the bidirectional screw rod.

[0012] As a preferred embodiment of the present invention, the outer walls of both locking rods are slidably connected to the inner wall of the slide groove, and the adjacent sides of the two locking rods are provided with anti-slip textured structures, and the external threads of the bidirectional screw are connected with locking nuts.

[0013] As a preferred technical solution of the present invention, the bottom end of the vertical screw is connected to the inner wall of the top of the fixed cover through a bearing, a lifting slide is provided on one side of the hollow column, and the outer wall of the lifting plate is slidably connected to the inner wall of the lifting slide.

[0014] As a preferred technical solution of the present invention, the servo driver includes a servo motor fixedly installed on the side wall of the fixed cover, a small bevel gear fixedly mounted on the output shaft of the servo motor, and a large bevel gear fixedly mounted on the bottom end of the vertical screw. The output shaft of the servo motor passes through one side of the fixed cover, and the small bevel gear and the large bevel gear mesh with each other.

[0015] As a preferred technical solution of the present invention, a monitoring method for an offshore wind farm wave monitoring device includes the following steps: S1: Fix the base to the designated monitoring area of ​​the offshore wind farm, and then adjust the height of the buoy through the height adjustment mechanism so that it can carry out monitoring work in sea level areas at different heights; S2: When the buoy is impacted by the waves on the sea surface, the buoy uses the thrust of the waves to make the ball rod drive the lifting plate to rise. After the impact force disappears, the lifting plate and the buoy will return to their original position due to the reset effect of the return spring. Then, when the lifting plate is continuously impacted by the waves on the sea surface, it will perform dynamic lifting and lowering movements and continuously hit the stress sensor. S3: The stress sensor, which is subjected to continuous impacts, feeds back the impact force of the waves to the controller for analysis and processing to convert it into the required wave monitoring data, and stores it in real time through the internal data storage module.

[0016] The beneficial effects of this invention are as follows: 1. When the buoy is impacted by sea waves, the buoy uses the thrust of the waves to lift the lifting plate upwards with the help of the ball rod. After the impact force disappears, the lifting plate and the buoy return to their original positions due to the reset effect of the return spring. Then, when the lifting plate is continuously impacted by sea waves, it will move up and down dynamically and continuously hit the stress sensor. The stress sensor, which is continuously hit, will feed back the impact force of the sea waves to the controller for analysis and processing to convert it into the required sea wave monitoring data, and store it in real time through the internal data storage module. 2. In this invention, a small bevel gear is driven to rotate by a servo motor. Subsequently, a large bevel gear meshing with the small bevel gear will drive the vertical screw to rotate. Then, under the limit of the lifting slide, the lifting plate threadedly connected to the vertical screw will drive the entire monitoring mechanism to move up and down. This makes it easy to flexibly adjust the height of the buoy, so that it can carry out monitoring work in sea level areas at different heights. 3. The present invention uses a plug-in connection method to install the monitor housing, and also uses a centering lock to lock and position it, which facilitates the disassembly, assembly and maintenance of the entire monitoring mechanism. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a three-dimensional magnified structural diagram of the monitoring mechanism in this invention; Figure 3 This is a three-dimensional magnified structural diagram of the interior of the monitor housing in this invention; Figure 4This is a three-dimensional enlarged structural diagram of the bottom area of ​​the lifting plate in this invention; Figure 5 This is a schematic diagram of the vertical cross-sectional three-dimensional structure of the height adjustment mechanism in this invention; Figure 6 This is a three-dimensional magnified structural diagram of the servo driver in this invention.

[0019] In the diagram: 1. Base; 2. Lifting plate; 3. Monitor housing; 4. Stress sensor; 5. Guide shaft; 6. Lifting plate; 7. Return spring; 8. Ball rod; 9. Float; 10. Controller; 11. Linear bearing; 12. Insert rod; 13. Insertion channel; 14. Slide groove; 15. Bidirectional screw; 16. Locking rod; 17. Rotary cap; 18. Locking nut; 19. Fixing cover; 20. Hollow column; 21. Vertical screw; 22. Servo motor; 23. Small bevel gear; 24. Large bevel gear; 25. Lifting slide. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1, referring to Figure 1-4 A wave monitoring device and monitoring method for offshore wind farms, comprising a base 1, a lifting plate 2 on the upper part of the base 1, and a monitoring mechanism installed at the bottom of the lifting plate 2. Specifically, the monitoring mechanism includes a monitor housing 3, a stress sensor 4 fixedly installed on the inner top wall of the monitor housing 3, two guide shafts 5 symmetrically fixed inside the monitor housing 3, a lifting plate 6 slidably connected inside the monitor housing 3, two return springs 7 sequentially sleeved on the lower part of the two guide shafts 5, a ball rod 8 fixedly connected to the outer wall of the bottom center of the lifting plate 6, a float 9 fixedly connected to the outer wall of the bottom end of the ball rod 8, and a controller 10 fixedly installed on the outer top wall of the lifting plate 2. Furthermore, two linear bearings 11 are fixedly embedded in the lifting plate 6, and the two linear bearings 11 are movably connected to the two guide shafts 5 respectively, which can ensure the stability and smoothness of the lifting plate 6 during its up and down movement. Furthermore, a movable hole is provided at the bottom center of the monitor housing 3, the outer wall of the ball rod 8 is slidably connected to the inner wall of the movable hole, the detection end of the stress sensor 4 is in contact with the top of the lifting plate 6, and the stress sensor 4 is electrically connected to the controller 10. In this embodiment, a plug rod 12 is welded to the top outer wall of the monitor housing 3, and a plug channel 13 is opened at the bottom of the lifting plate 2 to be inserted into it. A centering lock is provided on the lifting plate 2. Specifically, the centering locking device includes a slide groove 14 opened at the bottom of the lifting plate 2, a double-ended screw 15 rotatably installed in the slide groove 14, two locking rods 16 symmetrically screwed to the two opposite threaded ends of the double-ended screw 15, and a rotating cap 17 fixedly connected to the outer wall of one end of the double-ended screw 15. Furthermore, the outer walls of both locking rods 16 are slidably connected to the inner wall of the slide groove 14, which facilitates the stability of the linear movement of the two locking rods 16. Both locking rods 16 have anti-slip textured surfaces on adjacent sides to ensure stability after clamping. The external thread of the bidirectional screw 15 is connected to a locking nut 18. The locking effect of the locking nut 18 effectively prevents the bidirectional screw 15 from reversing under external force. During installation, the monitor housing 3 is installed by inserting the top insert rod 12 into the lifting plate. 2. Inside the bottom insertion channel 13, the bidirectional screw 15 is driven to rotate by the rotating cap 17. Under the limit of the slide groove 14, the two locking rods 16 threadedly connected to the bidirectional screw 15 will be aligned and close together to clamp and fix the monitor housing 3. Finally, the locking nut 18 is tightened to achieve the locking effect. In subsequent disassembly and maintenance, simply loosen the locking nut 18 and then reverse the bidirectional screw 15 by rotating the cap 17 to separate the two locking rods 16. Finally, the disassembly can be completed by pulling out the monitor housing 3. The working principle of this embodiment is as follows: When the buoy 9 is impacted by the waves on the sea surface, the buoy 9 uses the thrust of the waves to cause the ball rod 8 to drive the lifting plate 6 upward. After the impact force disappears, the lifting plate 6 and the buoy 9 will return to their original positions due to the reset effect of the return spring 7. Then, when the lifting plate 6 is continuously impacted by the waves on the sea surface, it will perform dynamic lifting and lowering movements and continuously hit the stress sensor 4. The stress sensor 4, which is continuously hit, will feed back the impact force of the waves to the controller 10 for analysis and processing to convert it into the required wave monitoring data, and store it in real time through the internal data storage module.

[0022] Example 2, refer to Figure 1 and Figure 5-6 This embodiment is an optimization based on embodiment 1, specifically: an offshore wind farm wave monitoring device and its monitoring method, which also includes a height adjustment mechanism; Specifically, the height adjustment mechanism includes a servo driver, a fixed cover 19 fixedly connected to the top outer wall of the base 1, a hollow column 20 fixedly connected to the top outer wall of the fixed cover 19, and a vertical screw 21 rotatably installed in the hollow column 20 and threadedly connected to the lifting plate 2. The bottom end of the vertical screw 21 is connected to the top inner wall of the fixed cover 19 through a bearing. Furthermore, a lifting slide 25 is provided on one side of the hollow column 20, and the outer wall of the lifting plate 2 is slidably connected to the inner wall of the lifting slide 25. This can limit the movement of the lifting plate 2 to ensure the stability of its linear movement. Furthermore, the servo driver includes a servo motor 22 fixedly mounted on the side wall of the fixed cover 19, a small bevel gear 23 fixedly mounted on the output shaft of the servo motor 22, and a large bevel gear 24 fixedly mounted on the bottom end of the vertical screw 21. The output shaft of the servo motor 22 passes through one side of the fixed cover 19, and the small bevel gear 23 and the large bevel gear 24 mesh with each other. The working principle of this embodiment is as follows: the servo motor 22 drives the small bevel gear 23 to rotate, and then the large bevel gear 24 meshing with the small bevel gear 23 drives the vertical screw 21 to rotate. Then, under the limit of the lifting slide 25, the lifting plate 2 threadedly connected to the vertical screw 21 drives the entire monitoring mechanism to move up and down. This makes it easy to flexibly adjust the height of the float 9, so that it can carry out monitoring work in sea level areas at different heights.

[0023] In addition, the present invention also proposes a monitoring method for an offshore wind farm wave monitoring device, comprising the following steps: S1: Fix the base 1 to the designated monitoring area of ​​the offshore wind farm, and then adjust the height of the buoy 9 through the height adjustment mechanism so that it can carry out monitoring work in sea level areas at different heights; S2: When the buoy 9 is impacted by the waves on the sea surface, the buoy 9 uses the thrust of the waves to make the ball rod 8 drive the lifting plate 6 to rise upward. After the impact force disappears, the lifting plate 6 and the buoy 9 will return to their original positions due to the reset effect of the return spring 7. Then, the lifting plate 6 will perform dynamic lifting and lowering movements and continuously hit the stress sensor 4 when it is continuously impacted by the waves on the sea surface. S3: The stress sensor 4, which is subjected to continuous impacts, feeds back the impact force of the waves to the controller 10 for analysis and processing to convert it into the required wave monitoring data, and stores it in real time through the internal data storage module.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wave monitoring device for offshore wind farms, comprising a base (1), characterized in that, The upper part of the base (1) is connected to the lifting plate (2) through the height adjustment mechanism, and the bottom of the lifting plate (2) is equipped with a monitoring mechanism. The monitoring mechanism includes a monitor housing (3), a stress sensor (4) fixedly installed on the inner wall of the top of the monitor housing (3), two guide shafts (5) symmetrically fixed inside the monitor housing (3), a lifting plate (6) slidably connected inside the monitor housing (3), two return springs (7) sequentially sleeved on the lower part of the two guide shafts (5), a ball rod (8) fixedly connected to the outer wall of the bottom center of the lifting plate (6), a float (9) fixedly connected to the outer wall of the bottom end of the ball rod (8), and a controller (10) fixedly installed on the outer wall of the top of the lifting plate (2). The height adjustment mechanism includes a servo driver, a fixed cover (19) fixedly connected to the top outer wall of the base (1), a hollow column (20) fixedly connected to the top outer wall of the fixed cover (19), and a vertical screw (21) rotatably installed in the hollow column (20) and threadedly connected to the lifting plate (2).

2. The wave monitoring device for offshore wind farms according to claim 1, characterized in that, The lifting plate (6) is fitted with two linear bearings (11), and the two linear bearings (11) are movably connected to the two guide shafts (5) respectively.

3. The offshore wind farm wave monitoring device according to claim 1, characterized in that, The monitor housing (3) has a movable hole at the bottom center, and the outer wall of the ball rod (8) is slidably connected to the inner wall of the movable hole.

4. The wave monitoring device for offshore wind farms according to claim 1, characterized in that, The detection end of the stress sensor (4) is in contact with the top of the lifting plate (6), and the stress sensor (4) is electrically connected to the controller (10).

5. The wave monitoring device for offshore wind farms according to claim 1, characterized in that, The top outer wall of the monitor housing (3) is welded with a plug rod (12), the bottom of the lifting plate (2) is provided with a plug channel (13) that is inserted into it, and the lifting plate (2) is provided with a centering lock.

6. The wave monitoring device for offshore wind farms according to claim 5, characterized in that, The centering locking device includes a groove (14) at the bottom of the lifting plate (2), a bidirectional screw (15) rotatably installed in the groove (14), two locking rods (16) symmetrically screwed to the two opposite thread ends of the bidirectional screw (15), and a rotating cap (17) fixedly connected to the outer wall of one end of the bidirectional screw (15).

7. The wave monitoring device for offshore wind farms according to claim 1, characterized in that, The outer walls of the two locking rods (16) are slidably connected to the inner wall of the groove (14). The two locking rods (16) are provided with anti-slip texture on adjacent sides, and the external thread of the bidirectional screw (15) is connected to a locking nut (18).

8. The wave monitoring device for offshore wind farms according to claim 1, characterized in that, The bottom end of the vertical screw (21) is connected to the top inner wall of the fixed cover (19) through a bearing. A lifting slide (25) is provided on one side of the hollow column (20), and the outer wall of the lifting plate (2) is slidably connected to the inner wall of the lifting slide (25).

9. The wave monitoring device for offshore wind farms according to claim 1, characterized in that, The servo driver includes a servo motor (22) fixedly mounted on the side wall of the fixed cover (19), a small bevel gear (23) fixedly mounted on the output shaft of the servo motor (22), and a large bevel gear (24) fixedly mounted on the bottom end of the vertical screw (21). The output shaft of the servo motor (22) passes through one side of the fixed cover (19), and the small bevel gear (23) and the large bevel gear (24) mesh with each other.

10. The monitoring method of the offshore wind farm wave monitoring device according to claim 1, characterized in that, Includes the following steps: S1: Fix the base (1) to the designated monitoring area of ​​the offshore wind farm, and then adjust the height of the buoy (9) through the height adjustment mechanism so that it can carry out monitoring work in sea level areas at different heights; S2: When the buoy (9) is impacted by the waves on the sea surface, the buoy (9) uses the thrust of the waves to make the ball rod (8) drive the lifting plate (6) to rise upward. After the impact force disappears, the lifting plate (6) and the buoy (9) will return to their original positions due to the reset effect of the reset spring (7). Then, the lifting plate (6) will make dynamic lifting and lowering movements and continuously hit the stress sensor (4) when it is continuously impacted by the waves on the sea surface. S3: The stress sensor (4), which is subjected to continuous impact, will feed back the impact force of the waves to the controller (10) for analysis and processing to convert it into the required wave monitoring data, and store it in real time through the internal data storage module.

Images