Method and system for testing influence of mosquitoes on rain erosion resistance of wind power blade coating

Abstract

The invention discloses a method and system for testing the influence of mosquitoes on the rain erosion resistance of a wind power blade coating, and belongs to the technical field of wind power blade performance testing. The test method comprises the following steps: adopting simulation pieces with the same structure and coating components as the wind power blade, dividing the simulation pieces into a control piece and a test piece, directly carrying out a rain erosion test on the control piece, carrying out a mosquito impact test on protective paint on the test piece, then carrying out a rain erosion resistance test on the blade coating, and comparing the substrate leakage time of the control piece and the test piece. The influence of mosquito impact on the rain erosion performance of the test piece is obtained. According to the method, the influence of mosquitoes on the rain erosion resistance of the coating can be firstly judged according to the time when the simulation part leaks out of the substrate, then whether the coating and the construction technology can meet the requirement of the blade for the weather resistance of the mosquitoes or not is determined, and finish paint or the technology is further correspondingly adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a method and system for testing the influence of mosquitoes on the rain erosion resistance of wind turbine blade coatings. Background Art

[0002] As the world pays more attention to clean energy and sustainable development, wind power generation, as a clean and renewable energy form, has become increasingly important. The core equipment of a wind power generation system is a wind turbine, which consists of multiple key components. The blades are the key part of capturing wind energy and converting it into mechanical energy. Their performance is directly related to the power generation efficiency and operating life of the entire wind turbine.

[0003] During the long-term operation of wind turbines, blades are inevitably exposed to complex and changing natural environments. One of the most significant problems is the accumulation of a boundary layer composed of insects, dust and other tiny particles on the leading edge of the blades. The formation of this boundary layer not only increases the aerodynamic resistance of the blades, reduces the efficiency of wind energy capture, but may also damage the surface material of the blades.

[0004] It is particularly noteworthy that insects such as mosquitoes tend to hit the leading edge of blades at night or in low wind speeds and leave their bodies, which release chemicals such as uric acid during decomposition. These chemicals are highly corrosive and can accelerate the degradation of the coating on the blade surface, thereby damaging the coating's rain erosion resistance and shortening the service life of the blade.

[0005] However, in the existing evaluation methods of the rain erosion resistance of wind turbine blade leading edge protection materials, the actual impact of biological factors such as mosquitoes on material performance is often ignored. Traditional testing methods mainly focus on simulating natural environmental factors such as rain erosion and ultraviolet radiation, but fail to fully reflect the complex biological and chemical erosion problems faced by blades in actual operation. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a method and device for evaluating the influence of mosquitoes on the rain erosion resistance of wind turbine blade coatings, so as to solve the problem that in the prior art, it is difficult to react or evaluate the influence of mosquitoes on the coating performance of wind turbine blades during service, and there is a lack of methods for testing the rain erosion resistance of the leading edge of the blades.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coatings comprises the following steps:

[0009] Step 1, obtaining two wind turbine blade simulation parts, wherein the wind turbine blade simulation parts are composed of a substrate and a coating coated on the surface of the substrate;

[0010] Step 2, placing a wind turbine blade simulation part in a rain erosion test device, performing a rain erosion test, and obtaining a control part after the rain erosion test;

[0011] Step 3, collecting mosquitoes by a black box method to obtain a black box containing mosquitoes;

[0012] Step 4, placing a wind turbine blade simulation part in a black box containing mosquitoes, and rotating the wind turbine blade simulation part at a working speed to obtain a process part;

[0013] Step 5, placing the process piece in a rain erosion test device, performing a rain erosion test, and obtaining a test piece after the rain erosion test;

[0014] Step 6, comparing the time it takes for the control piece and the test piece to leak out of the substrate, to obtain the effect of mosquito impact on the rain erosion resistance of the test piece.

[0015] A further improvement of the present invention is:

[0016] Preferably, the composition of the wind turbine blade simulation part is the same as that of the leading edge of the wind turbine blade, and the coating on the surface of the wind turbine blade simulation part is the same as that of the coating on the surface of the leading edge of the wind turbine blade.

[0017] Preferably, in step 1, the wind turbine blade simulation has a width of 3 to 8 cm, a length of 50 to 120 cm, and a thickness of ≥5 mm.

[0018] Preferably, in one test, the rain erosion test parameters of the control piece in step 2 and the rain erosion test parameters of the test piece in step 5 are the same.

[0019] Preferably, the rain erosion test parameters are: raindrop diameter is 3-5 mm, raindrop falling height is 300-400 mm, rain intensity is 15-30 mm / h, water temperature is 15-25°C, and the tail speed of blade rotation is 100-200 m / s.

[0020] Preferably, in step 4, the operating speed is 20-60 r / min and the rotation time is 48 h.

[0021] Preferably, the black box method is to place a black box at a monitoring point at dusk with the opening of the black box facing west, and collect mosquitoes the next day for identification and counting.

[0022] Preferably, the outer surface of the black box is black, and the inner surface is red or brown.

[0023] Preferably, the monitoring point is located at a working site of the wind turbine blade.

[0024] A testing device for the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating, used to implement the above-mentioned testing method, comprises a box body, a vertical support platform is arranged in the box body, a rain erosion rotating test bench is arranged on the vertical support platform, a rain shower device is arranged above the rain erosion rotating test bench, and the rain shower device is fixed in the box body through a supporting structure.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention discloses an evaluation method and device for the effect of mosquitoes on the rain erosion resistance of wind turbine blade coatings. The test method is to coat a protective coating on a substrate of the same material as the blade according to the actual operation process to obtain a simulation part. The simulation part is first subjected to a mosquito impact test of the protective paint, and then subjected to a rain erosion resistance test of the blade coating. The rain erosion resistance of the coating is judged according to the time when the simulation part leaks out of the substrate, and the effect of mosquitoes on the rain erosion resistance of the coating can be further judged, and whether the coating and construction process can meet the requirements of the blade for weather resistance to mosquitoes, and then the topcoat or process is adjusted accordingly. The application of this research test method can identify the effect of mosquitoes on the rain erosion resistance of blade coatings, timely repair and clean wind turbine blades, prevent a significant decrease in the rain erosion resistance of wind turbine blades, and ensure stable operation of blades.

[0027] Furthermore, suitable monitoring points are selected near the wind farm, and the black box method is used to collect and monitor the mosquito density near the wind farm.

[0028] Furthermore, the wind turbine blade test piece is placed vertically in the above black box and operated at the working speed of the wind turbine blade to truly simulate the working process of the wind turbine blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a test flow chart of the present invention;

[0030] Figure 2 This is a diagram of the rain erosion resistance test device of the present invention;

[0031] Among them, 1. Box body; 2. Wind turbine blade test piece; 3. Support structure; 4. Vertical support table; 5. Rain erosion rotation test bench; 6. Rain shower device. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0033] As pointed out in the background technology, the rain erosion resistance problem is mostly studied about the corrosion effect of rain on the leading edge of wind turbine blades. However, in places with dense mosquitoes, after hitting the leading edge of the blades, their bodies will remain on the leading edge of the wind turbine blades and decompose to release corrosive chemicals such as uric acid, which accelerates the degradation of the coating on the blade surface, thereby damaging the coating's rain erosion resistance and shortening the service life of the blades. However, there is little research on the impact of mosquitoes on the leading edge of the blades.

[0034] In order to solve the above problems, the first aspect of the present invention provides a method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating, comprising the following steps:

[0035] Step 1, obtain two wind turbine blade simulation parts; the composition of the wind turbine blade simulation part is the same as that of the leading edge of the wind turbine blade, and the coating on the surface of the wind turbine blade simulation part is the same as that of the coating on the surface of the wind turbine blade, so that the wind turbine blade simulation part can have the same composition as that of the leading edge of the wind turbine blade to be tested, and truly simulate the corrosion of the leading edge of the wind turbine blade to be tested in the rain and mosquito environment. The wind turbine blade simulation part includes a base material, which is the base material of the wind turbine blade, and the outer surface of the base material is coated with a coating, and the coating material is the same as the coating material of the leading edge of the wind turbine blade.

[0036] In some embodiments of the present invention, the wind turbine blade simulation has a width of 3 to 8 cm, a length of 50 to 120 cm, and a thickness of ≥5 mm.

[0037] Step 2, placing a wind turbine blade simulation part in a rain erosion test system, performing a rain erosion test, and obtaining a control part after the rain erosion test;

[0038] The rain erosion test parameters are: raindrop diameter is 3-5mm, raindrop falling height is 300-400mm, rain intensity is 15-30mm / h, water temperature is 15-25℃, and tail speed is 100-200m / s.

[0039] Step 3, collecting mosquitoes by a black box method;

[0040] (1) Select appropriate monitoring points near the wind farm, and use N-1 black box methods to collect and monitor the mosquito density near the wind farm, which is the working wind farm of the wind turbine blades.

[0041] (2) Select N-1 boxes with dimensions of 3m×3m×3m (27m 3 ), one end is open, the outside is painted black, and the inside is painted red or brown. The black exterior is used to attract mosquitoes, while the red or brown interior helps to capture mosquitoes.

[0042] (3) Place the black box at the selected monitoring point at dusk, making sure that the opening of the black box faces west and is placed in a shaded area with grass and trees.

[0043] (4) On the next morning (e.g., before 10 a.m.), the black box is retrieved and the mosquitoes inside are collected using an electric mosquito suction device for identification and counting.

[0044] As a preferred solution, during the black box method of collecting mosquitoes, the monitoring point where the black box is placed is located at the working site of the wind turbine blades, so that the number and type of mosquitoes collected meet local conditions.

[0045] In this step, a black box of appropriate size is selected. If the size is too small, fewer mosquitoes will be collected and the mosquito impact test cannot be completed. If the size is too large, the mosquitoes will be more dispersed and the density will be small, and the mosquito impact rate will be low, which will affect the test effect.

[0046] Step 4, placing a wind turbine blade simulation component in N black boxes, and rotating the wind turbine blade simulation component at a working speed to obtain a process component;

[0047] In some embodiments of the present invention, the remaining wind turbine blade simulation parts in step 1 are placed in the above-mentioned black box, and a device is provided in the black box to support and drive the wind turbine blade to rotate, and the wind turbine blade is operated at a speed of 20 to 60 r / min for 48 hours and then stopped. In this process, the wind turbine blade is placed in a standing position in the black box, which can simulate the working condition of the wind turbine blade.

[0048] Step 5, placing the process piece in a rain erosion test system, performing a rain erosion test, and obtaining a test piece after the rain erosion test;

[0049] The rain erosion test parameters are: raindrop diameter is 3-5mm, raindrop falling height is 300-400mm, rain intensity is 15-30mm / h, water temperature is 15-25℃, and tail speed is 100-200m / s.

[0050] Step 6, comparing the time it takes for the control piece and the test piece to leak out of the substrate, to obtain the effect of mosquito impact on the rain erosion performance of the test piece.

[0051] Furthermore, based on the above-mentioned substrate leakage time, the structure of the wind turbine blade and the coating composition on the surface of the wind turbine blade can be adjusted to improve the rain erosion resistance of the wind turbine blade.

[0052] The second aspect of the present invention discloses a testing system for the influence of mosquitoes on the rain erosion resistance of wind turbine blade coating for implementing the above-mentioned testing method, comprising a box body 1, wherein a vertical support platform 4 is arranged inside the box body 1, and a rain erosion rotating test platform 5 is arranged on the vertical support platform 4, and a rain shower device 6 is arranged above the rain erosion rotating test platform 5, and the rain shower device 6 is fixed in the box body 1 through a supporting structure 3.

[0053] The vertical support platform 4 is provided with a driving device for driving the rain erosion rotating test platform 5 to rotate, such as a driving motor or other device. The rain shower device 6 can be in the form of a radially dispersed nozzle or a rotating nozzle, and the nozzles are evenly arranged.

[0054] In some embodiments of the present invention, in a test experiment, the rain erosion test conditions in step 5 need to be consistent with the conditions in step 2.

[0055] Exemplarily, in step 2, the rain erosion test conditions are: raindrop diameter: 3.0mm, 4.0mm, 5mm, raindrop drop height: 300mm, 350mm, 400mm, rain intensity: 15mm / h, 20mm / h, 25mm / h, 30mm / h, water temperature: 15℃, 20℃, 25℃, and the tail speed of the blade rotation is 100m / s, 150m / s, 200m / s.

[0056] The present invention discloses a testing method and system for the effect of mosquitoes on the rain erosion resistance of wind turbine blade coatings. The testing method selects a protective coating on a substrate with the same material as the blade according to the actual operation process, first performs a mosquito impact test on the protective paint, and then performs a rain erosion resistance test on the blade coating to determine the failure mode of the rain erosion resistance of the coating. By comparing the time taken to expose the substrate to characterize the change in rain erosion resistance, it is possible to determine the effect of mosquitoes on the rain erosion resistance of the coating, and whether the coating and construction process can meet the requirements of the blade for weather resistance to mosquitoes, and then adjust the topcoat or process accordingly. The application of this research and testing method can identify the effect of mosquitoes on the rain erosion resistance of blade coatings, timely repair and clean wind turbine blades, prevent a significant decrease in the rain erosion resistance of wind turbine blades, and ensure stable operation of the blades.

[0057] The following is further described in conjunction with specific embodiments.

[0058] In the embodiment, three test pieces are tested in parallel under each raindrop diameter, rainfall height, rain intensity, test water temperature and tail speed condition.

[0059] Example 1

[0060] A wind turbine blade simulation with a width of 5 cm, a length of 100 cm, and a thickness of 10 mm was selected for rain erosion test as a control; the raindrop diameter of the rain erosion test was 3 mm, and the raindrop drop height was 300 mm. Based on this, a test matrix was constructed, as shown in Table 1, and the time (h) required to expose the substrate was obtained, which is the specific data in Table 1.

[0061] Table 1 Rain erosion test parameters and results of the control piece in Example 1

[0062]

[0063] The black box was placed at the monitoring point at dusk with the opening of the black box facing west. The data were collected the next day and were identified and counted. Another wind turbine blade simulation part of the same specification was placed in the black box and run at a speed of 50r / min for 48h before stopping to obtain the process part, which was subjected to a rain erosion test. The rain erosion test conditions were a test matrix with a raindrop diameter of 3mm and a raindrop drop height of 300mm, as shown in Table 2. The time (h) required to expose the substrate was obtained, which is the specific data in Table 2.

[0064] Table 2 Rain erosion test parameters and results of test pieces in Example 1

[0065]

[0066] Example 2

[0067] A wind turbine blade simulation with a width of 5 cm, a length of 100 cm, and a thickness of 10 mm was selected for rain erosion test. The raindrop diameter of the rain erosion test was 4.0 mm, and the raindrop falling height was 350 mm. Based on this, a test matrix was constructed, as shown in Table 1, and the time (h) required to expose the substrate was obtained, which is the specific data in Table 3.

[0068] Table 3 Rain erosion test parameters and results of the control piece in Example 2

[0069]

[0070] At dusk, the black box was placed at the monitoring point with the opening of the black box facing west. The data were collected the next day and were stable for identification and counting. Another wind turbine blade simulation part of the same specification was placed in the black box and run at a speed of 50r / min for 48h before stopping to obtain the process part, which was subjected to a rain erosion test. The conditions of the rain erosion test were a raindrop diameter of 4.0mm and a raindrop drop height of 350mm. The test matrix is ​​shown in Table 4, that is, the time (h) used to expose the substrate, which is the specific data in Table 2.

[0071] Table 4 Rain erosion test parameters and results of test pieces in Example 1

[0072]

[0073] Example 3

[0074] A wind turbine blade simulation with a width of 5 cm, a length of 100 cm, and a thickness of 10 mm was selected for rain erosion test as a control; the raindrop diameter of the rain erosion test was 5.0 mm, and the raindrop drop height was 400 mm. Based on this, a test matrix was constructed, as shown in Table 5, and the time (h) required to expose the substrate was obtained, which is the specific data in Table 5.

[0075] Table 5 Rain erosion test parameters and results of the control piece in Example 3

[0076]

[0077] The black box was placed at the monitoring point at dusk with the opening of the black box facing west. The data were collected the next day and were identified and counted. Another wind turbine blade simulation part of the same specification was placed in the black box and run at a speed of 50r / min for 48h before stopping to obtain the process part, which was subjected to a rain erosion test. The conditions of the rain erosion test were a test matrix with a raindrop diameter of 5.0mm and a raindrop drop height of 400mm, as shown in Table 6, i.e. the time (h) used to expose the substrate, which is the specific data in Table 6.

[0078] Table 6 Rain erosion test parameters and results of test pieces in Example 3

[0079]

[0080] Through the evaluation method of the present invention, it can be judged from the above test matrix that under the same rain erosion test conditions, the time required for the test piece to expose the underlying material is shorter than that of the process piece, and mosquitoes will reduce the rain erosion resistance of wind turbine blades.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0082] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0083] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test method for the effect of mosquitoes on the rain erosion resistance of wind turbine blade coatings, characterized in that: The following steps are involved: Step 1, obtaining two wind turbine blade simulation parts, wherein the wind turbine blade simulation parts are composed of a substrate and a coating coated on the surface of the substrate; Step 2, placing a wind turbine blade simulation part in a rain erosion test device, performing a rain erosion test, and obtaining a control part after the rain erosion test; Step 3, collecting mosquitoes by a black box method to obtain a black box containing mosquitoes; Step 4, placing a wind turbine blade simulation part in a black box containing mosquitoes, and rotating the wind turbine blade simulation part at a working speed to obtain a process part; Step 5, placing the process piece in a rain erosion test device, performing a rain erosion test, and obtaining a test piece after the rain erosion test; Step 6, comparing the time for the control piece and the test piece to leak out of the substrate, to obtain the effect of mosquito impact on the rain erosion resistance of the test piece.

2. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 1, characterized in that: The composition of the wind turbine blade simulation part is the same as that of the leading edge of the wind turbine blade, and the coating on the surface of the wind turbine blade simulation part is the same as that of the coating on the surface of the leading edge of the wind turbine blade.

3. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 1, characterized in that: In step 1, the wind turbine blade simulation has a width of 3 to 8 cm, a length of 50 to 120 cm, and a thickness of ≥5 mm.

4. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 1, characterized in that: In a test experiment, the rain erosion test parameters of the control piece in step 2 and the rain erosion test parameters of the test piece in step 5 are the same.

5. A method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 4, characterized in that: The rain erosion test parameters are: raindrop diameter is 3-5mm, raindrop falling height is 300-400mm, rain intensity is 15-30mm / h, water temperature is 15-25°C, and the tail speed of blade rotation is 100-200m / s.

6. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 1, characterized in that: In step 4, the operating speed is 20-60 r / min and the rotation time is 48 h.

7. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 1, characterized in that: The black box valve is to place the black box at the monitoring point at dusk with the opening of the black box facing west, and collect mosquitoes the next day for identification and counting.

8. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 7, characterized in that: The outer surface of the black box is black, and the inner surface is red or brown.

9. The method for testing the effect of mosquitoes on the rain erosion resistance of wind turbine blade coating according to claim 7, characterized in that: The monitoring point is located at the working place of the wind turbine blade.

10. A testing device for implementing the testing method of claim 1 to test the effect of mosquitoes on the rain erosion resistance of wind turbine blade coatings, characterized in that: The invention comprises a box (1), wherein a vertical support platform (4) is arranged inside the box (1), a rain erosion rotating test platform (5) is arranged on the vertical support platform (4), a rain shower device (6) is arranged above the rain erosion rotating test platform (5), and the rain shower device (6) is fixed in the box (1) via a support structure (3).

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