Device for monitoring fatigue damage of wind turbine blade and wind power generation equipment

Abstract

The application relates to the field of wind power generation technology, in particular to a device for monitoring fatigue damage of a windmill blade and a wind power generation equipment. The device comprises a shell, a cylinder, a first power generation unit, a processor, a monitoring unit and a sending unit. The shell is connected with the windmill blade, and a containing chamber is arranged in the shell. The cylinder is arranged in the containing chamber, and a gravity sliding block is arranged in the cylinder and can reciprocate in the cylinder. The first power generation unit is connected with the gravity sliding block, and the gravity sliding block is configured to make the first power generation unit generate current. The processor is connected with the first power generation unit, and the processor is configured to process the current generated by the first power generation unit. The monitoring unit is attached to the inside of the windmill blade and connected with the processor. The sending unit is electrically connected with the monitoring unit. The device for monitoring fatigue damage of the windmill blade can monitor the internal fatigue damage degree of the windmill blade in real time, and improves the safety and reliability of the operation of the windmill blade.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, and in particular to a device for monitoring fatigue damage of wind turbine blades and a wind power generation device. BACKGROUND

[0002] At present, wind power generation, as one of renewable green power energy, is favored by people. How to ensure the safe, stable and reliable operation of the unit in the wind power generation device, and ensure the reliability of power supply and the safety of power grid, is a problem that must be solved for the current wind power generation device.

[0003] The wind turbine blade is one of the important components in the wind power generation device, and the safety of the wind turbine blade directly determines the safety of the entire wind power generation device. In the actual operation process of the wind power generation device, the wind turbine blade will produce fatigue damage of different degrees, thereby cracks, fractures, and even the danger of falling. In the prior art, an unmanned aerial vehicle is usually used to observe the surface condition of the wind turbine blade, and the ground staff cannot master the internal condition of the wind turbine blade, so that the staff cannot timely discover the safety risks existing in the internal wind turbine blade, which is easy to produce certain safety hidden dangers, reduces the safety, stability and reliability of the wind turbine blade, and increases the cost.

[0004] Therefore, it is urgent to design a device for monitoring fatigue damage of wind turbine blades and a wind power generation device to solve the above technical problems. SUMMARY

[0005] The first purpose of the present application is to provide a device for monitoring fatigue damage of wind turbine blades, which can monitor the internal fatigue damage degree of the wind turbine blade in real time, timely discover the safety hidden dangers existing in the internal wind turbine blade, improve the safety and reliability of the operation of the wind turbine blade, and save cost.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The present application provides a device for monitoring fatigue damage of wind turbine blades, comprising:

[0008] A shell connected with the wind turbine blade, wherein an accommodating cavity is arranged inside the shell;

[0009] A cylinder arranged in the accommodating cavity, wherein a gravity sliding block is arranged in the cylinder, and the gravity sliding block can reciprocate in the cylinder;

[0010] A first power generation unit connected with the gravity sliding block, wherein the gravity sliding block is configured to make the first power generation unit generate electric current;

[0011] a processor connected with the first power generation unit, configured to process the current generated by the first power generation unit;

[0012] a monitoring unit attached to the inside of the windmill blade, connected with the processor, configured to monitor the fatigue damage inside the windmill blade;

[0013] a sending unit electrically connected with the monitoring unit, configured to send the fatigue damage signal monitored by the monitoring unit back to the ground.

[0014] As an optional technical solution of the device for monitoring the fatigue damage of the windmill blade, the first elastic member and the second elastic member are arranged in the cylinder, and the first elastic member and the second elastic member are respectively located at two ends of the gravity sliding block. One end of the first elastic member away from the gravity sliding block is connected with the inner wall of the cylinder, and one end of the second elastic member away from the gravity sliding block is connected with the inner wall of the cylinder.

[0015] As an optional technical solution of the device for monitoring the fatigue damage of the windmill blade, the side wall of the cylinder close to the first power generation unit is provided with an avoiding through slot, and part of the first power generation unit passes through the avoiding through slot and is connected with the gravity sliding block.

[0016] As an optional technical solution of the device for monitoring the fatigue damage of the windmill blade, the device for monitoring the fatigue damage of the windmill blade further comprises a transmission assembly and a second power generation unit, the transmission assembly is connected with the second power generation unit and the gravity sliding block, and the second power generation unit is connected with the processor.

[0017] The gravity sliding block can drive the transmission assembly to move, so that the transmission assembly drives the second power generation unit to generate current.

[0018] As an optional technical solution of the device for monitoring the fatigue damage of the windmill blade, the transmission assembly comprises a transmission belt and a roller, the transmission belt is sleeved on the roller, the roller is connected with the inner wall of the accommodating chamber, one end of the transmission belt is connected with one end of the gravity sliding block, and the other end of the transmission belt is connected with the other end of the gravity sliding block.

[0019] As an optional technical solution of the device for monitoring the fatigue damage of the windmill blade, a plurality of protrusions are protruded on the transmission belt, and the second power generation unit is engagedly connected with the protrusions.

[0020] As an optional technical scheme of the device for monitoring fatigue damage of wind turbine blade, a first through hole is formed in one end of the cylinder body, a second through hole is formed in the other end of the cylinder body, one end of the transmission belt is connected with one end of the gravity sliding block through the first through hole, and the other end of the transmission belt is connected with the other end of the gravity sliding block through the second through hole.

[0021] As an optional technical scheme of the device for monitoring fatigue damage of wind turbine blade, the device for monitoring fatigue damage of wind turbine blade further comprises an energy storage unit, the energy storage unit is connected with the processor, and the energy storage unit is electrically connected with the monitoring unit and the sending unit.

[0022] As an optional technical scheme of the device for monitoring fatigue damage of wind turbine blade, the monitoring unit comprises a stress sensor, and the sending unit comprises a microwave data transmitter.

[0023] The second object of the present application is to provide a wind power generation equipment, which has high safety, reliability and stability, and ground workers can find hidden safety hazards in the wind turbine blade in time, improve the safety performance of the wind turbine blade operation, and save costs.

[0024] To achieve the above object, the present application adopts the following technical scheme:

[0025] The present application provides a wind power generation equipment, which comprises a wind turbine blade and the device for monitoring fatigue damage of wind turbine blade described above, and the device for monitoring fatigue damage of wind turbine blade is connected with the wind turbine blade.

[0026] The present application has at least the following beneficial effects:

[0027] The application provides a device for monitoring fatigue damage of a windmill blade, comprising a shell, a cylinder, a first power generation unit, a processor, a monitoring unit and a sending unit. The shell is connected with the windmill blade, and a containing chamber is arranged in the shell. The cylinder is arranged in the containing chamber, and a gravity sliding block is arranged in the cylinder and can reciprocate in the cylinder. The first power generation unit is connected with the gravity sliding block, and the gravity sliding block is configured to make the first power generation unit generate current. The processor is connected with the first power generation unit, and is configured to process the current generated by the first power generation unit. The monitoring unit is arranged on the inside of the windmill blade and connected with the processor, and is configured to monitor fatigue damage inside the windmill blade. The sending unit is electrically connected with the monitoring unit, and is configured to send the fatigue damage signal monitored by the monitoring unit back to the ground. Through the arrangement of the first power generation unit, the processor, the monitoring unit and the sending unit, the technical problem that fatigue damage inside the windmill blade cannot be monitored in the prior art is solved. Thus, the operator can timely and accurately know the internal fatigue damage degree of the windmill blade, timely find the safety hazards existing in the windmill blade, improve the safety, reliability and stability of the windmill blade operation, and save cost.

[0028] The application also provides a wind power generation equipment with high safety, reliability and stability, and the operator on the ground can timely find the safety hazards existing in the windmill blade, improve the safety performance of the windmill blade operation, and save cost. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the contents of the embodiments of the application and the drawings.

[0030] Figure 1 The structure diagram of the device for monitoring fatigue damage of a windmill blade provided by the embodiments of the application.

[0031] REFERENCE NUMERALS

[0032] 100, shell; 110, containing chamber; 200, cylinder; 210, gravity sliding block; 220, first elastic member; 230, second elastic member; 300, first power generation unit; 400, second power generation unit; 500, processor; 600, monitoring unit; 700, sending unit; 800, transmission assembly; 810, transmission belt; 820, roller; 830, protrusion; 900, energy storage unit. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] In the description of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrated; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically defined and limited otherwise, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0037] As Figure 1As shown, the embodiment provides a device for monitoring fatigue damage of wind turbine blades, mainly comprising a shell 100, a cylinder body 200, a first power generation unit 300, a processor 500, a monitoring unit 600 and a sending unit 700. Among them, the shell 100 is connected with the wind turbine blade (not shown in the figure), and a containing chamber 110 is arranged inside the shell 100. The cylinder body 200 is arranged in the containing chamber 110, and a gravity sliding block 210 is arranged in the cylinder body 200, which can reciprocate in the cylinder body 200. The first power generation unit 300 is connected with the gravity sliding block 210, and the gravity sliding block 210 is configured to make the first power generation unit 300 generate current. The processor 500 is connected with the first power generation unit 300, and the processor 500 is configured to process the current generated by the first power generation unit 300. The monitoring unit 600 is attached to the inside of the wind turbine blade, for example, it can be pasted in the inside of the wind turbine blade by using conductive tape. And the monitoring unit 600 is connected with the processor 500, and the monitoring unit 600 is configured to monitor the fatigue damage inside the wind turbine blade. The sending unit 700 is electrically connected with the monitoring unit 600, and the sending unit 700 is configured to send the fatigue damage signal monitored by the monitoring unit 600 back to the ground.

[0038] Based on the above design, in the embodiment, since the shell 100 is connected with the wind turbine blade, under the influence of gravity, the gravity sliding block 210 in the cylinder body 200 will reciprocate in the cylinder body 200 with the rotation of the wind turbine blade, so that the gravity sliding block 210 can drive the first power generation unit 300 to reciprocate, and the first power generation unit 300 can generate current. The processor 500 can process the current generated by the first power generation unit 300, for example, it can perform voltage boosting, decoupling or direct current to alternating current processing work. The processed current can be supplied to the monitoring unit 600 and the sending unit 700 to ensure the normal work of the monitoring unit 600 and the sending unit 700. The monitoring unit 600 monitors the stress of multiple parts inside the wind turbine blade, thereby realizing real-time monitoring of the fatigue damage degree inside the wind turbine blade. The monitoring unit 600 can transmit the stress data of multiple parts inside the wind turbine blade (i.e. the fatigue damage signal inside the wind turbine blade) to the sending unit 700, and then the sending unit 700 sends the fatigue damage signal to the ground for engineers to monitor and analyze the actual fatigue condition of the wind turbine blade, to find the potential risk of the wind turbine blade in time, to improve the safety, reliability and stability of the wind turbine blade, and to avoid safety accidents. It should be pointed out that the monitoring of the stress of multiple parts inside the wind turbine blade by the monitoring unit 600 is real-time, thereby improving the timeliness and accuracy of the monitored data.

[0039] In some alternative implementations, the monitoring unit 600 can be configured as a stress sensor, such as a piezoresistive stress sensor, a capacitive stress sensor, etc.; the transmitting unit 700 can be configured as a microwave data transmitter, such as a microwave transmitter, etc.

[0040] Compared with existing technologies, the device for monitoring fatigue damage of wind turbine blades provided in this embodiment, through the configuration of a first power generation unit 300, a processor 500, a monitoring unit 600, and a transmitting unit 700, solves the technical problem that traditional technologies cannot monitor the internal fatigue damage of wind turbine blades. This allows operators to promptly and accurately determine the degree of internal fatigue damage to the wind turbine blades, identify potential safety hazards, improve the safety, reliability, and stability of wind turbine blade operation, and save costs. Furthermore, throughout the entire process of monitoring the internal fatigue damage of the wind turbine blades, there is no cable or wire connection between the ground and the wind turbine blades, effectively overcoming the problem of not being able to connect cables or wires during wind turbine blade rotation, while also saving energy consumption of ground equipment.

[0041] like Figure 1 As shown, in this embodiment, a first elastic element 220 and a second elastic element 230 are provided inside the cylinder 200. The first elastic element 220 and the second elastic element 230 are respectively located at both ends of the gravity slider 210. The end of the first elastic element 220 away from the gravity slider 210 is connected to the inner wall of the cylinder 200, and the end of the second elastic element 230 away from the gravity slider 210 is connected to the inner wall of the cylinder 200.

[0042] Furthermore, the first elastic element 220 is welded to the inner wall of the cylinder 200, and the second elastic element 230 is welded to the inner wall of the cylinder 200, thereby improving stability and reliability. The arrangement of the first elastic element 220 and the second elastic element 230 can, on the one hand, control the up-and-down movement of the gravity slider 210 inside the cylinder 200 (i.e., Figure 1 The left and right movement of the middle cylinder 200 plays a certain buffering role, preventing the gravity slider 210 from causing certain damage to the cylinder 200 and protecting the cylinder 200. On the other hand, the first elastic element 220 and the second elastic element 230 can also accumulate the gravitational potential energy of the gravity slider 210. That is, part of the gravitational potential energy of the gravity slider 210 is converted into the elastic potential energy of the first elastic element 220 or the second elastic element 230 and stored, realizing the conversion between gravitational potential energy and elastic potential energy, thereby achieving the effect of saving energy.

[0043] Furthermore, both the first elastic element 220 and the second elastic element 230 can be configured as springs.

[0044] In some optional embodiments, the cylinder 200 is provided with an avoiding through slot (not shown in the figure) near the side wall of the first power generation unit 300, and part of the first power generation unit 300 passes through the avoiding through slot and is connected with the gravity sliding block 210. For example, the first power generation unit 300 is provided with a gear, and the gear passes through the avoiding through slot and is connected with the gravity sliding block 210. In this way, when the gravity sliding block 210 reciprocates in the cylinder 200, the gravity sliding block 210 can drive the gear on the first power generation unit 300 to rotate, so that the first power generation unit 300 generates current. It should be pointed out that the first power generation unit 300 in the present embodiment can be a common generator on the market, and thus the specific structure thereof will not be described in more detail.

[0045] As shown in Figure 1 the present embodiment, the device for monitoring fatigue damage of wind turbine blades further comprises a transmission assembly 800 and a second power generation unit 400, the transmission assembly 800 is connected with the second power generation unit 400 and the gravity sliding block 210, and the second power generation unit 400 is connected with the processor 500. The gravity sliding block 210 can drive the transmission assembly 800 to move, so that the transmission assembly 800 drives the second power generation unit 400 to generate current, so that one of the second power generation unit 400 or the first power generation unit 300 can serve as a backup power supply to supply power to the monitoring unit 600 and the sending unit 700, thereby improving the reliability of the operation of the device for monitoring fatigue damage of wind turbine blades. It should be pointed out that the second power generation unit 400 in the present embodiment can be a common generator on the market, and thus the specific structure thereof will not be described in more detail.

[0046] Specifically, as shown in Figure 1 the transmission assembly 800 comprises a transmission belt 810 and a plurality of rollers 820, the transmission belt 810 is sleeved on the rollers 820, the rollers 820 are connected with the inner wall of the accommodation chamber 110, one end of the transmission belt 810 is connected with one end of the gravity sliding block 210, and the other end of the transmission belt 810 is connected with the other end of the gravity sliding block 210. A plurality of protrusions 830 are protruded on the transmission belt 810, and the second power generation unit 400 is engagedly connected with the protrusions 830. The rollers 820 can be provided in plurality, for example, four rollers 820 can be provided. When the gravity sliding block 210 reciprocates in the cylinder 200, the gravity sliding block 210 can drive the transmission belt 810 to reciprocate, so that the protrusions 830 on the transmission belt 810 can drive the gear on the second power generation unit 400 to rotate, so that the second power generation unit 400 generates current.

[0047] Further, one end of the cylinder 200 is provided with a first through hole (not shown in the figure), the other end of the cylinder 200 is provided with a second through hole (not shown in the figure), one end of the transmission belt 810 is connected with one end of the gravity sliding block 210 through the first through hole, the other end of the transmission belt 810 is connected with the other end of the gravity sliding block 210 through the second through hole. Exemplarily, the two ends of the gravity sliding block 210 are respectively provided with hooks, the two ends of the transmission belt 810 are respectively detachably tied on the hooks through the first elastic member 220 and the second elastic member 230, so as to improve the reliability and stability of the connection between the transmission belt 810 and the gravity sliding block 210.

[0048] As shown in Figure 1 In the embodiment, the device for monitoring fatigue damage of wind turbine blade further comprises an energy storage unit 900, the energy storage unit 900 is connected with the processor 500, and the energy storage unit 900 is electrically connected with the monitoring unit 600 and the sending unit 700. The arrangement of the energy storage unit 900 can ensure that the monitoring unit 600 and the sending unit 700 can still be powered during the stop of the wind turbine blade, and the reliability of the operation of the device for monitoring fatigue damage of wind turbine blade is ensured.

[0049] The embodiment further provides a wind power generation equipment, which comprises wind turbine blades and the above device for monitoring fatigue damage of wind turbine blade, and the device for monitoring fatigue damage of wind turbine blade is connected with the wind turbine blades. The safety, reliability and stability of the wind power generation equipment are high, the ground workers can find the safety hidden trouble existing in the wind turbine blades in time, the safety performance of the operation of the wind turbine blades is improved, and the cost is saved.

[0050] Exemplarily, one wind power generation equipment comprises three wind turbine blades, and a plurality of the devices for monitoring fatigue damage of wind turbine blade can be arranged on each wind turbine blade, so as to improve the monitoring of the fatigue damage of different parts of the same wind turbine blade, and improve the safety of the wind power generation equipment.

[0051] Preferably, the device for monitoring fatigue damage of wind turbine blade in the embodiment is arranged in the interior of the wind turbine blade, so as to avoid the interference of the external environment on the device for monitoring fatigue damage of wind turbine blade, improve the accuracy of the monitoring, prolong the service life of the device for monitoring fatigue damage of wind turbine blade, and save the cost.

[0052] Obviously, the above merely describes the preferred embodiments of the present application and the principles of the applied technology. It is understood by those skilled in the art that the present application is not limited to the specific embodiments herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

[0053] Note that, in the description of the specification, descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. The illustrative description of the above terms does not necessarily refer to the same embodiment or example throughout the specification. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

Claims

1. A device for monitoring fatigue damage of wind turbine blades, characterized in that, include: The housing (100) is connected to the wind turbine blade, and the housing (100) has an accommodating chamber (110) inside. A cylindrical body (200) is disposed within the accommodating chamber (110), and a gravity slider (210) is disposed within the cylindrical body (200), the gravity slider (210) being capable of reciprocating within the cylindrical body (200); A first power generation unit (300) is connected to the gravity slider (210), which is configured to generate current in the first power generation unit (300). A processor (500) is connected to the first power generation unit (300) and is configured to process the current generated by the first power generation unit (300); A monitoring unit (600) is attached to the inside of the wind turbine blade and connected to the processor (500). The monitoring unit (600) is configured to monitor fatigue damage inside the wind turbine blade. A transmitting unit (700) is electrically connected to the monitoring unit (600), and the transmitting unit (700) is configured to transmit the fatigue damage signal monitored by the monitoring unit (600) back to the ground; A transmission assembly (800) and a second power generation unit (400) are provided, wherein the transmission assembly (800) is connected to both the second power generation unit (400) and the gravity slider (210), and the second power generation unit (400) is connected to the processor (500). The gravity slider (210) can drive the transmission component (800) to move, so that the transmission component (800) drives the second power generation unit (400) to generate current.

2. The device for monitoring fatigue damage of wind turbine blades according to claim 1, characterized in that, The cylinder (200) is provided with a first elastic element (220) and a second elastic element (230). The first elastic element (220) and the second elastic element (230) are respectively located at both ends of the gravity slider (210). The end of the first elastic element (220) away from the gravity slider (210) is connected to the inner wall of the cylinder (200), and the end of the second elastic element (230) away from the gravity slider (210) is connected to the inner wall of the cylinder (200).

3. The device for monitoring fatigue damage of wind turbine blades according to claim 1, characterized in that, The cylinder (200) has an clearance slot on its side wall near the first power generation unit (300), and part of the first power generation unit (300) passes through the clearance slot to connect with the gravity slider (210).

4. The device for monitoring fatigue damage of wind turbine blades according to claim 1, characterized in that, The transmission assembly (800) includes a transmission belt (810) and a roller (820). The transmission belt (810) is sleeved on the roller (820). The roller (820) is connected to the inner wall of the accommodating chamber (110). One end of the transmission belt (810) is connected to one end of the gravity slider (210), and the other end of the transmission belt (810) is connected to the other end of the gravity slider (210).

5. The device for monitoring fatigue damage of wind turbine blades according to claim 4, characterized in that, The transmission belt (810) is provided with a plurality of protrusions (830), and the second power generation unit (400) is engaged with the protrusions (830).

6. The device for monitoring fatigue damage of wind turbine blades according to claim 4, characterized in that, One end of the cylinder (200) is provided with a first through hole, and the other end of the cylinder (200) is provided with a second through hole. One end of the transmission belt (810) passes through the first through hole and is connected to one end of the gravity slider (210). The other end of the transmission belt (810) passes through the second through hole and is connected to the other end of the gravity slider (210).

7. The device for monitoring fatigue damage of wind turbine blades according to any one of claims 1-6, characterized in that, The device for monitoring fatigue damage of wind turbine blades also includes an energy storage unit (900), which is connected to the processor (500) and electrically connected to the monitoring unit (600) and the transmitting unit (700).

8. The device for monitoring fatigue damage of wind turbine blades according to any one of claims 1-6, characterized in that, The monitoring unit (600) includes a stress sensor, and the transmitting unit (700) includes a microwave data transmitter.

9. A wind power generation device, characterized in that, The wind power generation equipment includes wind turbine blades and a device for monitoring fatigue damage of wind turbine blades as described in any one of claims 1-8, wherein the device for monitoring fatigue damage of wind turbine blades is connected to the wind turbine blades.

Images