A device structure suitable for wind turbine blade surface testing under dynamic load

Abstract

This utility model belongs to the technical field of materials testing equipment, specifically relating to a device structure suitable for testing the surface of wind turbine blades under dynamic loads, applicable to rain erosion / sand erosion tests on wind turbine blades under dynamic loads. By setting a connecting rod and loading unit connected to the testing machine, and with the reasonable arrangement of the spraying components, it is possible to perform rain erosion / sand erosion tests on samples while applying dynamic loads, significantly improving the engineering representativeness and reliability of the test results. The inclined slope structure and inclined groove at the bottom of the chamber facilitate the discharge and collection of liquid and sand particles, maintaining a clean experimental environment and effectively preventing the accumulation of liquid and sand particles from affecting the accuracy of the test. The flexible layout of the spraying components allows for easy adjustment of spray pressure, speed, and additives to simulate different rainfall / sandblasting intensities. Its overall structure is compact, easy to operate, has low installation and maintenance costs, broad application prospects, and is easy to promote.

Description

Technical Field

[0001] This utility model belongs to the technical field of material testing equipment, specifically relating to a device structure suitable for testing the surface of wind turbine blades under dynamic loads, applicable to rain erosion / sand erosion tests of wind turbine blades under dynamic loads. Background Technology

[0002] With the rapid development of the wind power industry, the size of wind turbine blades is constantly increasing, and the operating environment is becoming increasingly complex. During their service life, the leading edge area of ​​wind turbine blades is constantly exposed to high-speed raindrops and sand impacts, making them susceptible to rain erosion and sand erosion damage, which in turn affects the service life and production efficiency of the blades.

[0003] Currently, the rain erosion / sand erosion testing schemes widely used in existing technologies are mostly static fixtures or rotating arm devices, which are difficult to simulate the complex dynamic load environment that blades are subjected to during service, resulting in deviations between the test results and the actual situation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a device structure suitable for testing the surface of wind turbine blades under dynamic loads. The device has a compact overall structure and is easy to operate and use. It can realize the simultaneous application of dynamic mechanical loading and rain erosion / sand erosion conditions, thereby improving the realism of the test simulation and the reliability of the experiment.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A device structure suitable for testing the surface of wind turbine blades under dynamic loads includes a housing 6. An upper loading unit 2 and a lower loading unit 3 are respectively provided in the upper and lower parts of the inner cavity of the housing 6, and a wind turbine blade sample 1 to be tested is held between the upper loading unit 2 and the lower loading unit 3.

[0007] The top of the upper loading unit 2 is fixedly connected to an upper connecting rod 4, and the bottom of the lower loading unit 3 is fixedly connected to a lower connecting rod 5. The upper connecting rod 4 and the lower connecting rod 5 pass through the top and bottom of the housing 6 respectively and are connected to an external loading device.

[0008] The side wall of the housing 6 is equipped with a spraying assembly 7. The input end of the spraying assembly 7 is connected to a rainwater or sand supply device. The output nozzle of the spraying assembly 7 is inserted into the inner cavity of the housing 6 and faces the leading edge area of ​​the wind turbine blade sample 1.

[0009] Preferably, the bottom of the inner cavity of the box 6 is provided with an inclined slope 8, and an inclined groove 9 is provided on one side of the inclined slope 8.

[0010] Preferably, both the upper connecting rod 4 and the lower connecting rod 5 are provided with connecting holes 10, and are connected to the corresponding loading end of the external loading device through the connecting holes 10 and the connecting shaft.

[0011] Preferably, both the upper loading unit 2 and the lower loading unit 3 are clamping plates made of high-strength metal or composite materials.

[0012] Preferably, the upper loading unit 2 and the lower loading unit 3 are fixedly connected to the upper connecting rod 4 and the lower connecting rod 5 respectively through corresponding threaded connectors.

[0013] Preferably, the clamping surface shapes of the upper loading unit 2 and the lower loading unit 3 are adapted to the upper and lower surfaces of the wind turbine blade sample 1, respectively.

[0014] Preferably, the housing 6 is made of a transparent or translucent material.

[0015] Preferably, the side wall of the housing 6 is provided with multiple equipment mounting supports.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] 1. The testing device of this utility model, by setting up a connecting rod and loading unit connected to the testing machine, and with the reasonable arrangement of the spray components, can realize the spray rain erosion / sand erosion test of the sample while applying dynamic load, which can truly restore the service conditions of wind turbine blades and significantly improve the engineering representativeness and reliability of the test results.

[0018] 2. The bottom of the box of this utility model is provided with an inclined slope structure and an inclined groove, which facilitates the discharge and collection of liquid and sand particles, keeps the experimental environment clean, and can effectively avoid the accumulation of liquid and sand particles from affecting the accuracy of the test.

[0019] 3. The spraying component of this utility model has a flexible layout, and the spraying pressure, speed and additives can be easily adjusted to simulate different rainfall / sandblasting intensity conditions.

[0020] 4. This utility model has a compact overall structure, is easy to operate and use, has low installation and maintenance costs, and has broad application prospects and is easy to promote. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of the device structure in the embodiments of this utility model;

[0022] Figure 2 This is a front view of the device structure in an embodiment of this utility model;

[0023] Figure 3 This is a side view of the device structure in an embodiment of this utility model.

[0024] In the figure: 1-Wind turbine blade sample; 2-Upper loading unit; 3-Lower loading unit; 4-Upper connecting rod; 5-Lower connecting rod; 6-Box; 7-Injection assembly; 8-Inclined slope; 9-Inclined groove; 10-Connecting hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0030] Example 1: This example provides a device structure suitable for testing the surface of wind turbine blades under dynamic loads, such as... Figures 1-3 As shown, it mainly includes: wind turbine blade sample 1, upper loading unit 2, lower loading unit 3, upper connecting rod 4, lower connecting rod 5, box body 6, and injection assembly 7;

[0031] The upper part of the inner cavity of the box 6 is provided with an upper loading unit 2 and a lower loading unit 3, respectively, and the wind turbine blade sample 1 to be tested is held between the upper loading unit 2 and the lower loading unit 3.

[0032] The top of the upper loading unit 2 is fixedly connected to an upper connecting rod 4, and the bottom of the lower loading unit 3 is fixedly connected to a lower connecting rod 5. The upper connecting rod 4 and the lower connecting rod 5 pass through the top and bottom of the housing 6 respectively and are connected to an external loading device.

[0033] The side wall of the housing 6 is equipped with a spraying assembly 7. The input end of the spraying assembly 7 is connected to a rainwater or sand supply device. The output nozzle of the spraying assembly 7 is inserted into the inner cavity of the housing 6 and faces the leading edge area of ​​the wind turbine blade sample 1.

[0034] Furthermore, the bottom of the inner cavity of the box 6 is provided with an inclined slope 8, and an inclined groove 9 is provided on one side of the inclined slope 8.

[0035] Furthermore, both the upper connecting rod 4 and the lower connecting rod 5 are provided with connecting holes 10, and are connected to the corresponding loading end of the external loading device through the connecting holes 10 and the connecting shaft.

[0036] Furthermore, both the upper loading unit 2 and the lower loading unit 3 are clamping plates made of high-strength metal or composite materials.

[0037] Furthermore, the upper loading unit 2 and the lower loading unit 3 are respectively fixedly connected to the upper connecting rod 4 and the lower connecting rod 5 through corresponding threaded connectors.

[0038] Furthermore, the clamping surface shapes of the upper loading unit 2 and the lower loading unit 3 are adapted to the upper and lower surfaces of the wind turbine blade sample 1, respectively.

[0039] Furthermore, the housing 6 is made of a transparent or translucent material.

[0040] Furthermore, the side wall of the enclosure 6 is provided with multiple equipment mounting supports.

[0041] Example 2: This example provides a device structure suitable for testing the surface of wind turbine blades under dynamic loads. The sample is fixed between the loading units, and the loading units are arranged symmetrically from top to bottom, consisting of two units. One end of each unit is connected to a corresponding connecting rod. The connecting rods pass through the top and bottom of the housing and are provided with connecting holes for connecting to external loading equipment to realize the loading force transmission path.

[0042] The box is a sealed structure that contains the sample and loading components. The bottom of the box is equipped with an inclined slope structure to facilitate the collection and discharge of flushing liquids and sand particles into a lower place.

[0043] The spraying assembly is fixedly installed on the side wall of the chamber and can spray out liquid or sand particles to simulate rain or sandstorms and directionally wash the leading edge area of ​​the sample.

[0044] Furthermore, the connecting rod can be connected to the loading head of the fatigue testing machine via a connecting shaft, thereby enabling the synchronous loading of dynamic loads (such as alternating tension, compression, or bending) onto the sample.

[0045] Furthermore, the loading unit is made of high-strength metal or composite material, and its clamping surface conforms to the shape of the sample to ensure uniform loading.

[0046] Furthermore, the enclosure is made of transparent or semi-transparent material to facilitate observation of rain erosion / sand erosion processes, and the outer wall of the enclosure is provided with mounting positions for imaging recording equipment.

[0047] Furthermore, the spraying assembly can adjust the fluid pressure, speed, angle, temperature, and additives. The fluid medium can be water, salt water, and / or organic matter, and organic and / or inorganic particles, particles (solid form), and dissolved substances can be added to the fluid medium, or a mixture thereof can be used as the medium to simulate different rain erosion / sand erosion conditions.

[0048] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0049] In summary:

[0050] 1. The testing device of this utility model, by setting up a connecting rod and loading unit connected to the testing machine, and with the reasonable arrangement of the spray components, can realize the spray rain erosion / sand erosion test of the sample while applying dynamic load, which can truly restore the service conditions of wind turbine blades and significantly improve the engineering representativeness and reliability of the test results.

[0051] 2. The bottom of the box of this utility model is provided with an inclined slope structure and an inclined groove, which facilitates the discharge and collection of liquid and sand particles, keeps the experimental environment clean, and can effectively avoid the accumulation of liquid and sand particles from affecting the accuracy of the test.

[0052] 3. The spraying component of this utility model has a flexible layout, and the spraying pressure, speed and additives can be easily adjusted to simulate different rainfall / sandblasting intensity conditions.

[0053] 4. This utility model has a compact overall structure, is easy to operate and use, has low installation and maintenance costs, and has broad application prospects and is easy to promote.

[0054] The above embodiments are only used to illustrate the design concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The protection scope of this utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in this utility model are within the protection scope of this utility model.

Claims

1. A device structure suitable for testing the surface of wind turbine blades under dynamic loads, characterized in that: Includes a housing (6), the upper part and the lower part of the inner cavity of the housing (6) are respectively provided with an upper loading unit (2) and a lower loading unit (3), and the wind turbine blade sample (1) to be tested is held between the upper loading unit (2) and the lower loading unit (3). The top of the upper loading unit (2) is fixedly connected to an upper connecting rod (4), and the bottom of the lower loading unit (3) is fixedly connected to a lower connecting rod (5). The upper connecting rod (4) and the lower connecting rod (5) pass through the top and bottom of the box (6) respectively and are connected to the external loading device. The side wall of the housing (6) is equipped with a spray assembly (7). The input end of the spray assembly (7) is connected to a rainwater or sand supply device. The output nozzle of the spray assembly (7) is inserted into the inner cavity of the housing (6) and faces the leading edge area of ​​the wind turbine blade sample (1).

2. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 1, characterized in that: The bottom of the inner cavity of the box (6) is provided with an inclined slope (8), and an inclined groove (9) is provided on one side of the inclined slope (8).

3. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 1, characterized in that: Both the upper connecting rod (4) and the lower connecting rod (5) are provided with connecting holes (10), and are connected to the corresponding loading end of the external loading device through the connecting holes (10) and the connecting shaft.

4. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 1, characterized in that: Both the upper loading unit (2) and the lower loading unit (3) are clamping plates made of high-strength metal or composite materials.

5. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 4, characterized in that: The upper loading unit (2) and the lower loading unit (3) are fixedly connected to the upper connecting rod (4) and the lower connecting rod (5) respectively through corresponding threaded connectors.

6. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 4, characterized in that: The clamping surface shapes of the upper loading unit (2) and the lower loading unit (3) are adapted to the upper and lower surfaces of the wind turbine blade sample (1), respectively.

7. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 1, characterized in that: The box (6) is made of transparent or semi-transparent material.

8. The device structure for testing the surface of wind turbine blades under dynamic loads according to claim 7, characterized in that: The side wall of the enclosure (6) is provided with multiple equipment mounting supports.

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