Wind power plant fan blade damage detection device

Abstract

The utility model provides a wind power plant fan blade damage detection device which comprises grooves (2) distributed on fan blades (1) in an array mode, micro optical fiber sensors (3) are arranged in the grooves (2), a signal transmitting module (4) is arranged at the root of each blade (1), the signal transmitting modules (4) are connected with the micro optical fiber sensors (3) through optical fibers, and a detection mechanism (12) comprises signal receiving modules (12a). The control processing module (12b) and the display screen (12c) are electrically connected, the detection mechanism (12) is installed on a fan tower, the photovoltaic panel (10) is arranged on a fan supporting column, and the photovoltaic panel (10) is electrically connected with the detection mechanism (12). The device is small in detection error, and small cracks of the fan blade can be easily detected.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic maintenance, and in particular to a device for detecting damage to wind turbine blades in a wind farm. Background Art

[0002] Wind turbine blades are an important part of wind turbines, but they usually work in harsh environments. Due to the influence of wind and sand, typhoons, lightning strikes, high and low temperatures, various corrosions, and long-term natural losses, cracks or even damage and breakage on the blade surface are inevitable. When cracks appear on the surface of wind turbine blades or even gradually break, it will affect the overall load distribution of the blades. When the surface damage of the blades is serious, it will not only affect its power generation to a certain extent, but also cause safety hazards. Therefore, staff are required to grasp the relevant situation in a timely manner and deal with the problem in a timely manner. Using traditional manual inspection is not only time-consuming and labor-intensive, but also difficult to operate, and inefficient, and safety is not guaranteed.

[0003] After searching, the China Patent Network disclosed a wind turbine blade surface crack monitoring device (publication number CN202471643U), at least one conductive medium is laid along the root and trailing edge of the blade; at least one conductive medium is laid along the root and spar cap of the blade; a conductive signal detection detector is connected to the above conductive medium through a cable, and carbon fiber is pre-laid on the trailing edge and spar cap of the blade in advance during the blade forming process, and the good conductive properties of carbon fiber are used to form a conductive path. According to the change in the resistance of each conductive path on the blade, the blade surface crack damage degree is graded and monitored. Compared with the traditional manual monitoring method, this monitoring method not only has good real-time performance and high reliability, but also is simple and practical, and the monitoring cost is relatively low. However, the wind turbine blade damage detection device detects the surface crack damage of the blade by setting a conductive path, not directly detecting the surface crack damage of the blade. The detection error is large, it is not easy to detect small cracks, and it is difficult to accurately judge the damage degree of the wind blade. Utility Model Content

[0004] In view of the above-mentioned defects in the prior art, the utility model provides a wind farm wind turbine blade damage detection device which has small detection error and can easily detect small cracks.

[0005] The technical solution provided by the utility model is: a wind farm wind turbine blade damage detection device, including grooves distributed in an array on the wind turbine blades, micro-optical fiber sensors are arranged in the grooves, a signal transmitting module is arranged at the root of each blade, the signal transmitting module is connected to the micro-optical fiber sensor through an optical fiber, a detection mechanism includes a signal receiving module, a control processing module, and a display screen, the three are electrically connected, the detection mechanism is installed on the wind turbine tower, and a photovoltaic panel is arranged on the wind turbine support column, and the photovoltaic panel is electrically connected to the detection mechanism.

[0006] Furthermore, a collar is sleeved on the fan support column, a connecting plate is fixedly connected to one side of the collar, and a displacement sensor is installed on the top of the connecting plate.

[0007] Furthermore, a connecting rod is fixedly connected to the other side of the collar, and a photovoltaic panel is fixedly connected to the other end of the connecting rod.

[0008] Furthermore, both sides of the displacement sensor are connected to protective seats, the height of the protective seats is greater than the height of the displacement sensor, and both sides of the protective seats are connected to receiving plates.

[0009] Due to the provision of a micro-fiber optical sensor, a signal transmitting module, and a detection mechanism, the utility model has a small detection error and can easily detect small cracks in the fan blades. Due to the provision of a displacement sensor, the utility model can detect deviations and looseness in the connection between the fan blades 1 and the output shaft of the fan cabin. Due to the provision of a protective seat and a receiving plate, the utility model protects the displacement sensor and also has a certain protective effect on people and property under the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0011] Figure 1 This is a three-dimensional structure diagram of the utility model. Figure 1 .

[0012] Figure 2 This is a three-dimensional structure diagram of the utility model. Figure 2 .

[0013] Figure 3 It is a three-dimensional structural schematic diagram of the wind blade of the utility model.

[0014] Figure 4 It is a three-dimensional structural schematic diagram of the connecting plate of the utility model.

[0015] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0016] 1. Wind blade; 2. Groove; 3. Optical fiber sensor; 4. Signal transmitting module; 5. Ring; 6. Connecting plate; 7. Protective seat; 8. Adapter plate; 9. Connecting rod; 10. Photovoltaic panel; 11. Displacement sensor; 12. Detection mechanism; 12a. Signal receiving module; 12b. Control processing module; 12c. Display screen; 13. Mounting plate; 14. Rainproof roof; DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0018] Unless otherwise defined, technical or scientific terms used herein shall have the common meanings understood by a person having ordinary skills in the field to which this application belongs.

[0019] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0020] The wind turbine generally includes a support base, a tower is installed at the top center of the support base, a support column is installed on the top of the tower, and three wind blades are rotatably arranged on one side of the top of the support column, such as Figure 1 , Figure 2 , Figure 3 As shown, the utility model wind farm wind turbine blade damage detection device includes grooves 2 distributed in an array on the wind turbine blades 1, micro optical fiber sensors 3 are arranged in the grooves 2, a signal transmitting module 4 is arranged at the root of each blade 1, the signal transmitting module 4 is connected to the micro optical fiber sensor 3 through an optical fiber, a detection mechanism 12 includes a signal receiving module 12a, a control processing module 12b, and a display screen 12c, the three of which are electrically connected, the detection mechanism 12 is installed on the wind turbine tower, and a photovoltaic panel 10 is arranged on the wind turbine support column, and the photovoltaic panel 10 is electrically connected to the detection mechanism 12. The utility model embeds optical fiber sensors 3 at key positions of wind blades 1 and distributes them in arrays. The sensors 3 are connected inside the blades 1 through optical fibers and are connected to the signal transmitting module 4 set at the root of the blades 1 to detect changes in internal stress and strain during the dynamic process of service, and to monitor deformation and cracks caused by external forces, fatigue, etc. in real time. Then, the signal transmitting module 4 transmits, and the signal receiving module 12a receives the signal and transmits it to the control processing module 12b. The control processing module 12b can realize the state monitoring and damage assessment of the wind turbine blades 1, and then can be displayed on the display screen 12c, which is conducive to improving the detection accuracy, facilitating accurate judgment of the damage degree of the wind turbine blades 1, improving the detection accuracy, and being able to quickly and accurately perform online real-time monitoring of crack damage of the wind turbine blades 1. During the whole process, the photovoltaic panel 10 provides power to the detection mechanism 12.

[0021] Furthermore, the detection mechanism 12 is installed on the wind turbine tower through the mounting plate 13, which can improve the stability of the detection mechanism.

[0022] Furthermore, a rainproof roof 14 is installed on the top of the detection mechanism 12 to provide protection for the detection mechanism 12 and prevent internal short circuits and rust.

[0023] Furthermore, a collar 5 is sleeved on the fan support column, and a connecting plate 6 is fixedly connected to one side of the collar 5. A displacement sensor 11 is installed on the top of the connecting plate 6, and the displacement sensor 11 is electrically connected to the signal receiving module 12. By setting the displacement sensor 11, when the connection between the fan blade 1 and the output shaft of the fan cabin deviates and loosens, the distance between the wind blade 1 and the displacement sensor 11 becomes closer, and the displacement sensor 11 can sense the change in distance. After analysis and processing by the detection mechanism 12, it can be displayed on the display screen 12c, and the position change of the wind blade 1 can be detected non-contactly. The deviation and looseness of the connection between the fan blade 1 and the output shaft of the fan cabin can be detected in real time. When the distance is less than a certain value, the control processor 12b immediately shuts down the fan, and then performs manual maintenance, thereby avoiding equipment damage and reducing economic losses.

[0024] Furthermore, a connecting rod 9 is fixedly connected to the other side of the collar 5, and a photovoltaic panel 10 is fixedly connected to the other end of the connecting rod 9. The stability and lighting efficiency of the photovoltaic panel 10 can be improved.

[0025] Furthermore, both sides of the displacement sensor 11 are connected with protective seats 7, the height of the protective seats 7 is greater than the height of the displacement sensor 11, and both sides of the protective seats 7 are connected with receiving plates 8. The displacement sensor 11 is protected, and the person and property under the wind turbine are also protected to a certain extent.

[0026] Furthermore, the protective seat 7 and the receiving plate 8 are both made of rubber material, which further improves the protective effect.

[0027] The above description is merely an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A wind farm wind turbine blade damage detection device, characterized in that The invention comprises a plurality of grooves (2) distributed in an array on a wind turbine blade (1), a micro optical fiber sensor (3) being arranged in each groove (2), a signal transmitting module (4) being arranged at the root of the blade, the signal transmitting module (4) being connected to the micro optical fiber sensor (3) via an optical fiber, a detection mechanism (12) comprising a signal receiving module (12a), a control processing module (12b), and a display screen (12c), the three of which are electrically connected, the detection mechanism (12) being installed on a wind turbine tower, and a photovoltaic panel (10) being arranged on a wind turbine support column, the photovoltaic panel (10) being electrically connected to the detection mechanism (12).

2. A wind farm wind turbine blade damage detection device according to claim 1, characterized in that The detection mechanism (12) is installed on the wind turbine tower via a mounting plate (13).

3. A wind farm wind turbine blade damage detection device according to claim 1 or 2, characterized in that A rainproof roof (14) is installed on the top of the detection mechanism (12).

4. A wind farm wind turbine blade damage detection device according to claim 1, characterized in that A collar (5) is sleeved on the fan support column, a connecting plate (6) is fixedly connected to one side of the collar, a displacement sensor (11) is installed on the top of the connecting plate (6), and the displacement sensor (11) is electrically connected to a signal receiving module (12a).

5. A wind farm wind turbine blade damage detection device according to claim 4, characterized in that: The other side of the collar (5) is fixedly connected to a connecting rod (9), and the other end of the connecting rod (9) is fixedly connected to a photovoltaic panel (10).

6. A wind farm wind turbine blade damage detection device according to claim 4, characterized in that Both sides of the displacement sensor (11) are connected to protection seats (7), the height of the protection seats is greater than the height of the displacement sensor (11), and both sides of the protection seat (7) are connected to receiving plates (8).

7. A wind farm wind turbine blade damage detection device according to claim 6, characterized in that The protective seat (7) and the receiving plate (8) are both made of rubber material.

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