Wind power blade testing device and testing method

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By designing an adjustable wind power blade test device, the combined connection of slewing support and wedge flange is used to solve the problems of angle blind spots and surface blind spots in the prior art, and the flexibility and accuracy of multi-angle tests are achieved.

CN119572431APending Publication Date: 2025-03-07ZHONG FU LIAN ZHONG (LIAN YUN GANG) FENG DIAN YE PIAN YOU XIAN GONG SI

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Patent Information

Application Number: CN202411708434.7
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-11-27
Publication Date: 2025-03-07

AI Technical Summary

Technical Problem

Existing wind power blade testing devices cannot effectively avoid angular blind spots and surface blind spots, resulting in high testing costs and inaccurate results.

Method used

A wind power blade test device is designed, including a test bench, a slewing support, a wedge flange and a test flange. By selectively connecting these components, a variety of rotation angles and loading angles are adjusted to avoid interference between the blades and the ground in the case of extreme pre-bending.

Benefits of technology

The device can meet the rotation angle and loading angle requirements of different test requirements, avoid angle blind spots and surface blind spots, reduce test costs, and improve the accuracy of test results.

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Abstract

The invention belongs to the technical field of wind power blade testing, and discloses a wind power blade testing device and method. The testing device comprises a testing stand, a slewing bearing, a wedge-shaped flange and a testing flange, the testing flange can be fixedly connected with the wind power blade and is selectively and directly connected with one of the wedge-shaped flange, the slewing bearing and the testing stand, so that the wind power blade is installed on the testing stand at a preset loading angle and a preset rotation angle, and the testing stand is used for testing the wind power blade. The wedge-shaped flange can be installed between the test flange and the test bench to adjust the loading angle, and the slewing bearing can be installed between the test flange and the test bench to adjust the rotation angle, so that different requirements on the rotation angle and the loading angle during different tests are met, interference between the wind power blade and the ground under the condition of limit pre-bending is avoided, and the test efficiency is improved. And meanwhile, additional support is avoided, an angle blind area and a surface blind area which are difficult to implement a testing means in the testing process are avoided, the testing cost can be greatly reduced, and the accuracy of a testing result is improved.

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Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade testing, and in particular to a wind turbine blade testing device and a testing method. Background Art

[0002] As wind turbine blades develop towards larger sizes and lower costs, the safety margins in wind turbine blade design are gradually reduced, increasing the risk of wind turbine blade damage. In order to ensure the safe operation of wind turbine blades, they need to undergo a variety of safety tests such as fatigue tests and static tests.

[0003] The prior art provides a variety of wind turbine blade test benches that can perform various types of tests, including static tests, fatigue tests, modal tests, lightning protection tests, etc. These tests are intended to evaluate the strength, durability, reliability and other performance of the blades. However, the test bench used for testing is limited by the volume, weight and installation method of the wind turbine blades, and can only fix the wind turbine blades in a horizontal posture for various tests, resulting in an angle blind spot that is difficult to implement the test method when testing the wind turbine blades. At the same time, for wind turbine blades, since the wind turbine blades need to be supported from bottom to top so that they are at a height suitable for testing, there will also be surface blind spots on the wind turbine blades that are difficult to implement the test method. These two blind spots make it difficult to conduct related tests conveniently and efficiently, which can easily affect the test results, thereby incurring additional testing costs.

[0004] Therefore, there is an urgent need for a wind turbine blade testing device and a testing method to solve the above technical problems. Summary of the invention

[0005] An object of the present invention is to provide a wind turbine blade testing device that can avoid angle blind areas and surface blind areas that make it difficult to implement testing methods during the testing process, reduce testing costs, and improve the accuracy of test results.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The wind turbine blade testing device comprises a test bench, a slewing bearing, a wedge flange and a test flange, wherein:

[0008] The test flange can be fixedly connected to the wind turbine blade, and selectively directly connected to one of the wedge flange, the slewing bearing and the test bench, so as to install the wind turbine blade on the test bench at a preset loading angle and rotation angle. The wedge flange can be installed between the test flange and the test bench to adjust the loading angle, and the slewing bearing can be installed between the test flange and the test bench to adjust the rotation angle.

[0009] Preferably, the slewing bearing has a first part and a second part, the first part can be fixedly connected to the test bench, the second part can selectively connect to one of the test flange and the wedge flange, and the first part and the second part are rotatably arranged around the axis direction of the slewing bearing to adjust the rotation angle.

[0010] Preferably, the wedge-shaped flange has a wedge-shaped longitudinal section, and the wedge-shaped flange is detachably disposed between the test flange and the test bench to adjust the loading angle.

[0011] Preferably, the test flange, the wedge-shaped flange and the slewing bearing all have special-shaped holes extending therethrough, and bolts are passed through the special-shaped holes. The bolts can fix the test flange and at least one of the wedge-shaped flange, the slewing bearing and the test bench, and only when the wedge-shaped flange is connected between the test flange and the test bench, the bolts are arranged at an angle to the axial direction of the special-shaped holes.

[0012] The beneficial effect of the wind turbine blade testing device provided by the present invention is that, through the wind turbine blade testing device, according to the rotation angle and loading angle required by the specific wind turbine blade, the slewing bearing and the wedge flange can be selectively installed between the test flange and the test bench, or the slewing bearing and the wedge flange can be separated from the test bench, that is, the test flange is directly connected to the test bench, so that the wind turbine blade testing device can achieve a variety of rotation angles and loading angles by changing the connection relationship, thereby meeting the different requirements for rotation angles and loading angles in different tests of wind turbine blades, and avoiding the interference between the wind turbine blades and the ground under extreme pre-bending conditions. At the same time, it also realizes a solution of supporting only by the root of the wind turbine blade, avoiding the angle blind spots and surface blind spots that are difficult to implement the test means during the test process, which can greatly reduce the test cost and improve the accuracy of the test results.

[0013] Another object of the present invention is to provide a wind turbine blade testing method that can avoid angle blind spots and surface blind spots that make it difficult to implement testing methods during the testing process, reduce testing costs, and improve the accuracy of test results.

[0014] To achieve this object, the present invention adopts the following technical solutions:

[0015] The wind turbine blade testing method is implemented in the above-mentioned wind turbine blade testing device, comprising:

[0016] According to a preset rotation angle, one of the slewing bearing, the wedge flange and the test flange is selectively installed on the test bench; according to a preset loading angle, one of the wedge flange and the test flange is selectively installed on the test bench or the slewing bearing; a wind turbine blade is installed on the test flange, and the test flange is connected to one of the wedge flange, the slewing bearing and the test bench.

[0017] Preferably, when the rotation angle is a first reference zero degree and the loading angle is a second reference zero degree, the test flange is installed on the test bench.

[0018] Preferably, when the rotation angle is a first reference zero degree and the loading angle is not a second reference zero degree, the test flange is mounted on the wedge-shaped flange, and the wedge-shaped flange is mounted on the test bench.

[0019] Preferably, when the rotation angle is not the first reference zero degree and the loading angle is not the second reference zero degree, the test flange, the wedge flange, the slewing bearing and the test bench are connected in sequence.

[0020] Preferably, when the rotation angle is not the first reference zero degree and the loading angle is the second reference zero degree, the test flange, the slewing bearing and the test bench are connected in sequence.

[0021] Preferably, when the slewing bearing is connected between the test bench and the test flange, the rotation angle is adjusted by adjusting the rotation angle between the first part and the second part of the slewing bearing; or,

[0022] When the wedge-shaped flange is connected between the test bench and the test flange, the loading angle is adjusted by adjusting the installation angle of the wedge-shaped flange on the slewing bearing or the test bench; or,

[0023] When the slewing bearing and the wedge-shaped flange are connected between the test bench and the test flange, the rotation angle and the loading angle are adjusted by adjusting the rotation angle between the first part and the second part of the slewing bearing or the installation angle of the wedge-shaped flange on the slewing bearing.

[0024] The beneficial effects of the wind turbine blade testing method provided by the present invention are as follows: through this testing method, a variety of rotation angles and loading angles of the wind turbine blades can be achieved by changing the connection relationship, thereby satisfying the different requirements for rotation angles and loading angles during different tests of the wind turbine blades, and avoiding the interference between the wind turbine blades and the ground under extreme pre-bending conditions. At the same time, a solution of supporting only by the root of the wind turbine blade is realized, avoiding the angle blind spots and surface blind spots that are difficult to implement the testing means during the test process, which can greatly reduce the testing cost and improve the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view of the wind turbine blade testing device provided by the present invention;

[0026] Figure 2 It is a side exploded view of the wind turbine blade testing device provided by the present invention;

[0027] Figure 3 yes Figure 2 A partial enlarged view of point B in the middle;

[0028] Figure 4 is a front view of the test flange of the present invention;

[0029] Figure 5 yes Figure 1 A partial enlarged view of point A in the middle.

[0030] In the figure:

[0031] 100. Wind turbine blades;

[0032] 1. Test bench; 11. First threaded hole; 12. Second threaded hole;

[0033] 2. Test flange; 21. First special-shaped hole; 22. Countersunk hole; 23. Third special-shaped hole; 24. Fourth special-shaped hole; 25. Lifting ear;

[0034] 3. Slewing bearing; 31. First part; 32. Second part; 321. Third threaded hole; 322. Fourth threaded hole;

[0035] 4. Wedge-shaped flange; 41. Second special-shaped hole; 42. Fifth special-shaped hole; 43. Sixth special-shaped hole. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] The following is based on the attached Figure 1 To Attachment Figure 5 The invention introduces a wind turbine blade testing device and a testing method.

[0041] refer to Figure 1 As shown, in this embodiment, the wind turbine blade 100 can be installed on the test bench 1, and by reasonably setting the loading angle and the rotation angle during installation, the wind turbine blade 100 can be prevented from interfering with the ground under the action of gravity ( Figure 1 The middle curve shows the state of interference between the end of the wind turbine blade 100 and the ground under the extreme pre-bending condition), and the effect of facilitating the testing of the wind turbine blade 100 at different angles. It should be noted that in the present application, the loading angle refers to the angle between the projection of the axis direction of the wind turbine blade 100 in the vertical plane and the preset reference, and the rotation angle refers to the angle between the longitudinal section of the wind turbine blade 100 and the longitudinal section of the test bench 1.

[0042] Specifically, Figure 2 , Figure 3 As shown, in this embodiment, the wind turbine blade test device includes a test bench 1, a slewing bearing 3, a wedge-shaped flange 4 and a test flange 2. The test bench 1 is fixedly arranged and can be used to support the slewing bearing 3, the wedge-shaped flange 4 and the test flange 2. The test flange 2 is used to install the wind turbine blade 100 on the wind turbine blade test device, so as to perform specific detection operations.

[0043] The slewing bearing 3 and the wedge-shaped flange 4 can be detachably arranged in the wind turbine blade test device, wherein the wedge-shaped flange 4 can be installed between the test flange 2 and the test bench 1 to adjust the loading angle, and the slewing bearing 3 can be installed between the test flange 2 and the test bench 1 to adjust the rotation angle. During the test, according to the loading angle and rotation angle required for the actual test, the test flange 2 can be directly connected to one of the wedge-shaped flange 4, the slewing bearing 3 and the test bench 1, so as to meet the test requirements.

[0044] For example, in some test items, the wind turbine blade 100 can be mounted on the test flange 2, and the test flange 2 can be directly mounted on the test bench 1. At this time, the slewing bearing 3 and the wedge-shaped flange 4 are separated from the wind turbine blade test device, and the wind turbine blade 100 is at a suitable loading angle and rotation angle, and can be subjected to test items such as fatigue testing.

[0045] In some other test items, the wind turbine blade 100 can be installed on the test flange 2, the test flange 2 can be installed on the slewing bearing 3, and the slewing bearing 3 can be installed on the test bench 1. The slewing bearing 3 can adjust the rotation angle of the wind turbine blade 100, and test items such as static test can be performed.

[0046] When the size of the wind turbine blade 100 is large, and the wind turbine blade 100 is installed at a smaller loading angle, the end of the wind turbine blade 100 may collide with the ground, affecting the test results. In this case, the wedge flange 4 can be installed between the test flange 2 and the test bench 1, or the wedge flange 4 can be installed between the test flange 2 and the slewing bearing 3, so that the wind turbine blade 100 is installed at a larger loading angle to avoid the phenomenon of the wind turbine blade 100 colliding with the ground. Of course, by adjusting the installation angle between the wedge flange 4 and the slewing bearing 3, the loading angle can be adjusted within a certain range, thereby achieving a more appropriate loading angle, that is, ensuring that the wind turbine blade 100 is not in a state of interfering with the ground, and does not require the use of additional support other than the test flange 2.

[0047] Through the wind turbine blade testing device, according to the rotation angle and loading angle required by the specific wind turbine blade 100, the slewing bearing 3 and the wedge-shaped flange 4 can be selectively installed between the test flange 2 and the test bench 1, or the slewing bearing 3 and the wedge-shaped flange 4 can be separated from the test bench 1, that is, the test flange 2 is directly connected to the test bench 1, so that the wind turbine blade testing device can achieve a variety of rotation angles and loading angles by changing the connection relationship, thereby meeting the different requirements for rotation angles and loading angles during different tests of the wind turbine blade 100, and avoiding the interference between the wind turbine blade 100 and the ground under extreme pre-bending conditions. At the same time, it also realizes a solution of supporting only by the root of the wind turbine blade 100, avoiding the angle blind spots and surface blind spots that are difficult to implement the test means during the test process, which can greatly reduce the test cost and improve the accuracy of the test results.

[0048] In this embodiment, the slewing bearing 3 is a structure capable of connecting the wedge-shaped flange 4 and the test flange 2 to the test bench 1 at different angles. Specifically, the slewing bearing 3 has a first portion 31 and a second portion 32, the first portion 31 can be fixedly connected to the test bench 1, the second portion 32 is rotatably arranged through the first portion 31, and the second portion 32 can selectively connect to one of the test flange 2 and the wedge-shaped flange 4. The first portion 31 and the second portion 32 are rotatably arranged around the axis direction of the slewing bearing 3 to adjust the rotation angle of the wind turbine blade 100.

[0049] For example, in some embodiments, such as when a static test is performed and the wind turbine blade 100 is relatively small, the first portion 31 is connected to the test bench 1, the second portion 32 is connected to the test flange 2, and the wedge-shaped flange 4 is separated from the test flange 2 and the test bench 1. At this time, by rotating the second portion 32 and adjusting the relative angle between the second portion 32 and the first portion 31, the rotation angle of the wind turbine blade 100 can be adjusted quickly and flexibly.

[0050] In some other embodiments, for example, when a static test is performed and the wind turbine blade 100 is relatively large, the first portion 31 is connected to the test bench 1, and the second portion 32 is connected with the wedge-shaped flange 4 and the test flange 2. During installation, the wedge-shaped flange 4 can be first installed on the second portion 32, and the relative angle between the second portion 32 and the first portion 31 can be pre-adjusted. Then, the wind turbine blade 100 and the test flange 2 are installed on the wedge-shaped flange 4, so that the wind turbine blade 100 has a suitable loading angle. In addition, during the test process, the second portion 32 can still be rotated to achieve the effect of quickly and flexibly adjusting the rotation angle of the wind turbine blade 100.

[0051] More specifically, if Figure 3As shown, in this embodiment, the wedge-shaped flange 4 has a longitudinal section with a wedge-shaped arrangement, and is detachably arranged between the test flange 2 and the test bench 1. When the wedge-shaped flange 4 is separated between the test flange 2 and the test bench 1, the mounting surfaces of the test flange 2 and the test bench 1 are arranged in parallel; when the wedge-shaped flange 4 is arranged between the test flange 2 and the test bench 1, an angle is formed between the mounting surfaces of the test flange 2 and the test bench 1. Therefore, by selectively arranging the wedge-shaped flange 4 between the test flange 2 and the test bench 1, the wind turbine blade 100 can be installed in two different states: without a loading angle and with a loading angle.

[0052] More specifically, in this embodiment, the test flange 2 is provided with a countersunk hole 22, and a bolt is passed through the countersunk hole 22, and the bolt can be connected to the wind turbine blade 100, so that the wind turbine blade 100 is installed on the test flange 2. The countersunk head of the countersunk hole 22 is located on the side of the test flange 2 away from the wind turbine blade 100, so as to avoid interference between the bolt and any one of the wedge-shaped flange 4, the slewing bearing 3 and the test bench 1.

[0053] In addition, the test flange 2, the wedge-shaped flange 4 and the second part 32 all have special-shaped holes that are arranged through them, and bolts are passed through the special-shaped holes. The bolts can fix the test flange 2 and at least one of the wedge-shaped flange 4, the second part 32 and the test bench 1, thereby respectively realizing four connection methods of directly installing the test flange 2 on the test bench 1, installing the test flange 2 and the slewing bearing 3 on the test bench 1, installing the test flange 2 and the wedge-shaped flange 4 on the test bench 1, and installing the test flange 2, the wedge-shaped flange 4 and the slewing bearing 3 on the test bench 1, so that the wind turbine blade 100 is at different rotation angles and loading angles to meet different testing needs.

[0054] It should be noted that the above-mentioned special-shaped holes can adopt various structures such as waist-shaped holes, elliptical holes, rectangular holes, etc. As long as when a wedge-shaped flange 4 is connected between the test flange 2 and the test bench 1, the bolts can be set at an angle with the axial direction of the special-shaped hole, thereby forming a non-parallel connection between the test flange 2 and the mounting surface of the slewing bearing 3 or the test bench 1, it falls within the scope of protection of the present invention.

[0055] Specifically, Figure 4 , Figure 5 As shown, in this embodiment, a plurality of first threaded holes 11 are provided on the mounting surface of the test bench 1, and the plurality of first threaded holes 11 are arranged in a circumference. A plurality of first special-shaped holes 21 are correspondingly provided on the test flange 2, and the plurality of first special-shaped holes 21 are arranged one-to-one correspondingly with the plurality of first threaded holes 11. In some embodiments, bolts can be used to pass through the first special-shaped holes 21 and be correspondingly installed in the first threaded holes 11, so that the test flange 2 can be directly installed parallel to the mounting surface of the test bench 1.

[0056] Continue to refer to Figure 4 , Figure 5 As shown, the mounting surface of the test bench 1 is also provided with a second threaded hole 12, and a bolt can pass through the first part 31 of the slewing bearing 3, so that the first part 31 is installed on the test bench 1. The second part 32 of the slewing bearing 3 is provided with a third threaded hole 321 and a fourth threaded hole 322, and the plurality of third threaded holes 321 and the plurality of fourth threaded holes 322 are arranged circumferentially around the axis of the slewing bearing 3, and the fourth threaded hole 322 is arranged farther from the axis of the slewing bearing 3 than the third threaded hole 321. The test flange 2 is provided with a third special-shaped hole 23 and a fourth special-shaped hole 24, and the third special-shaped hole 23 and the third threaded hole 321 are arranged one-to-one, and the fourth special-shaped hole 24 and the fourth threaded hole 322 are arranged one-to-one, and the bolt can pass through the third special-shaped hole 23 and be connected to the third threaded hole 321, or pass through the fourth special-shaped hole 24 and be connected to the fourth threaded hole 322, so that the test flange 2 is installed on the second part 32.

[0057] Of course, when connecting the test flange 2 and the second part 32, the bolts can be set only in the third shaped hole 23 and the third threaded hole 321, or only in the fourth shaped hole 24 and the fourth threaded hole 322, or simultaneously in the third shaped hole 23 and the third threaded hole 321, the fourth shaped hole 24 and the fourth threaded hole 322, as long as the installation requirements of the wind turbine blade 100 can be met, and this is not specifically limited in the present invention. It can be understood that, compared with only through the third shaped hole 23 and the third threaded hole 321 or only through the fourth shaped hole 24 and the fourth threaded hole 322, the installation method of simultaneously setting the third shaped hole 23 and the third threaded hole 321, the fourth shaped hole 24 and the fourth threaded hole 322 is conducive to fixing a wind turbine blade 100 with a heavier weight. Therefore, in some embodiments, more shaped holes and threaded hole structures can be set on the test flange 2 and the slewing bearing 3, which also belongs to the scope of protection of the present invention.

[0058] Continue to refer to Figure 4 , Figure 5As shown, in this embodiment, the wedge-shaped flange 4 is provided with a second special-shaped hole 41, a fifth special-shaped hole 42 and a sixth special-shaped hole 43. Among them, the plurality of second special-shaped holes 41 are arranged in a circle around the axis of the wedge-shaped flange 4, and the second special-shaped holes 41 are arranged one-to-one with the above-mentioned first threaded holes 11. During installation, the bolts can pass through the test flange 2 from the above-mentioned first special-shaped hole 21, pass through the wedge-shaped flange 4 from the second special-shaped hole 41, and be installed in the first threaded hole 11 of the test bench 1, so that the test flange 2 and the wedge-shaped flange 4 are installed on the test bench 1. Of course, due to the wedge-shaped flange 4, at this time, the bolts are inclined in the first special-shaped hole 21 and the second special-shaped hole 41, and form a certain angle with the axis of the first special-shaped hole 21 and the second special-shaped hole 41, respectively, so that the test flange 2 can be installed on the test bench 1 in a non-parallel manner, and then the wind turbine blade 100 is installed at a preset loading angle.

[0059] Continue to refer to Figure 4 , Figure 5 As shown, a plurality of fifth special-shaped holes 42 and a plurality of sixth special-shaped holes 43 are arranged in a circle around the axis of the wedge-shaped flange 4, respectively. The fifth special-shaped holes 42 and the third threaded holes 321 are arranged one-to-one, and the sixth special-shaped holes 43 and the fourth threaded holes 322 are arranged one-to-one. When the wedge-shaped flange 4 and the slewing bearing 3 need to be installed between the test flange 2 and the test bench 1, the bolts can be arranged only in the third special-shaped hole 23, the fifth special-shaped hole 42 and the third threaded hole 321, or only in the fourth special-shaped hole 24, the sixth special-shaped hole 43 and the fourth threaded hole 322, or at the same time in the third special-shaped hole 23, the fifth special-shaped hole 42 and the third threaded hole 321, and the fourth special-shaped hole 24, the sixth special-shaped hole 43 and the fourth threaded hole 322, as long as the installation requirements of the wind turbine blade 100 can be met, and this is not specifically limited in the present invention.

[0060] Optionally, in this embodiment, in order to facilitate the rotation of the slewing bearing 3 and adjust the angle between the first part 31 and the second part 32, at least two lifting ears 25 are further provided on the periphery of the test flange 2. Exemplarily, in this embodiment, six lifting ears 25 are evenly arranged on the periphery of the test flange 2, and the interval between two adjacent lifting ears 25 is 60°. During the test process or the preparation process of the test, the lifting equipment and the test flange 2 can be connected through the lifting ears 25, so that the test flange 2 can be rotated quickly and conveniently by applying external force to the lifting ears 25, thereby rotating the slewing bearing 3 provided between the test flange 2 and the test bench 1.

[0061] The present invention also provides a wind turbine blade testing method, which is applied to the above-mentioned wind turbine blade testing device, and the testing method comprises:

[0062] According to a preset rotation angle, one of the slewing bearing 3, the wedge-shaped flange 4 and the test flange 2 is selectively installed on the test bench 1; according to a preset loading angle, one of the wedge-shaped flange 4 and the test flange 2 is selectively installed on the test bench 1 or the slewing bearing 3; the wind turbine blade 100 is installed on the test flange 2, and the test flange 2 is connected to one of the wedge-shaped flange 4, the slewing bearing 3 and the test bench 1.

[0063] Specifically, in the test scheme, the preset rotation angle and the preset loading angle are determined according to the requirements of the test items and the extreme pre-bending state of the wind turbine blade 100, and are known parameters or parameter ranges. It should be noted that it is possible to first select whether to install the wedge flange 4 and the slewing bearing 3 according to the loading angle, and then select whether to install the slewing bearing 3 according to the rotation angle, or it is possible to first select whether to install the slewing bearing 3 according to the rotation angle, and then select whether to install the wedge flange 4 and the slewing bearing 3 according to the loading angle. The method does not limit the order of installation of each structure. For example, the wedge flange 4 can be installed on the slewing bearing 3 first, and then the slewing bearing 3 can be installed on the test bench 1, or the slewing bearing 3 can be installed on the test bench 1 first, and then the wedge flange 4 can be installed on the slewing bearing 3. Therefore, as long as the installation of the slewing bearing 3 and the wedge flange 4 is evaluated according to the preset rotation angle and the preset loading angle in the test method, it belongs to the scope of protection of the present invention.

[0064] Through this testing method, various rotation angles and loading angles of the wind turbine blade 100 can be achieved by changing the connection relationship, thereby satisfying the different requirements for rotation angles and loading angles of the wind turbine blade 100 during different tests, and avoiding the interference between the wind turbine blade 100 and the ground under extreme pre-bending conditions. At the same time, a solution of supporting the wind turbine blade 100 only by the root of the wind turbine blade 100 is realized, avoiding angle blind spots and surface blind spots that are difficult to implement testing methods during the test process, which can greatly reduce the test cost and improve the accuracy of the test results.

[0065] For the convenience of illustration, the following will be described separately based on whether the rotation angle is the first reference zero degree and whether the loading angle is the second reference zero degree. The first reference zero degree is a preset rotation angle reference value. For example, when the longitudinal section of the wind turbine blade 100 is perpendicular to the vertical plane, it is defined that the rotation angle of the wind turbine blade 100 is at the first reference zero degree. The second reference zero degree is a preset loading angle reference value. For example, when the bottom end face of the wind turbine blade 100 is parallel to the mounting surface of the test bench 1, it is defined that the loading angle of the wind turbine blade 100 is at the second reference zero degree.

[0066] In the first case, the rotation angle is the first reference zero degree, and the loading angle is the second reference zero degree, and the test flange 2 can be installed on the test bench 1. At this time, it is only necessary to control the relative angle between the test flange 2 and the test bench 1 to ensure that the rotation angle is the first reference zero degree.

[0067] In the second case, when the rotation angle is the first reference zero degree and the loading angle is not the second reference zero degree, the test flange 2, the wedge flange 4 and the test bench 1 are connected in sequence. By installing the wedge flange 4 on the test bench 1 at a suitable relative angle, or selecting a wedge flange 4 whose longitudinal section shape and size meet the specific test requirements, the test requirement that the loading angle is not the second reference zero degree can be met during the test.

[0068] In the third case, the rotation angle is not the first reference zero degree, and the loading angle is the second reference zero degree, and the test flange 2, the slewing bearing 3 and the test bench 1 can be connected in sequence. Through the slewing bearing 3, the relative angle between the test flange 2 and the test bench 1 can be easily adjusted, so that during the test process, the test requirements when the rotation angle is not the first reference zero degree are met.

[0069] In the fourth case, the rotation angle is not the first reference zero degree, and the loading angle is not the second reference zero degree, and the test flange 2, the wedge flange 4, the slewing bearing 3 and the test bench 1 can be connected in sequence. Through the slewing bearing 3, the relative angle between the test flange 2 and the test bench 1, and the relative angle between the wedge flange 4 and the test bench 1 can be easily adjusted, so that during the test process, the test requirements that the rotation angle is not the first reference zero degree and the loading angle is not the second reference zero degree are met.

[0070] Of course, during the test, when it is necessary to change the rotation angle or the loading angle, the following steps can be adaptively selected according to whether the slewing bearing 3 and the wedge flange 4 are installed between the test bench 1 and the test flange 2.

[0071] For example, in some embodiments, when a slewing bearing 3 is connected between the test bench 1 and the test flange 2 , the rotation angle can be adjusted by adjusting the rotation angle between the first portion 31 and the second portion 32 of the slewing bearing 3 .

[0072] In some other embodiments, when a wedge-shaped flange 4 is connected between the test bench 1 and the test flange 2 , the loading angle can be adjusted by adjusting the installation angle of the wedge-shaped flange 4 on the slewing bearing 3 or the test bench 1 .

[0073] In this embodiment, when the slewing bearing 3 and the wedge-shaped flange 4 are connected between the test bench 1 and the test flange 2, the rotation angle and the loading angle are adjusted by adjusting the rotation angle between the first part 31 and the second part 32 of the slewing bearing 3 or the installation angle of the wedge-shaped flange 4 installed on the slewing bearing 3.

[0074] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A wind turbine blade testing device, characterized in that: The invention comprises a test bench (1), a slewing bearing (3), a wedge-shaped flange (4) and a test flange (2), wherein: The test flange (2) can be fixedly connected to the wind turbine blade (100), and can be selectively directly connected to one of the wedge-shaped flange (4), the slewing bearing (3) and the test bench (1), so as to install the wind turbine blade (100) on the test bench (1) at a preset loading angle and rotation angle; the wedge-shaped flange (4) can be installed between the test flange (2) and the test bench (1) to adjust the loading angle; and the slewing bearing (3) can be installed between the test flange (2) and the test bench (1) to adjust the rotation angle.

2. The wind turbine blade testing device according to claim 1, characterized in that: The slewing bearing (3) comprises a first part (31) and a second part (32), wherein the first part (31) can be fixedly connected to the test bench (1), and the second part (32) can be selectively connected to one of the test flange (2) and the wedge-shaped flange (4), and the first part (31) and the second part (32) are rotatably arranged around the axis direction of the slewing bearing (3) to adjust the rotation angle.

3. The wind turbine blade testing device according to claim 2, characterized in that: The wedge-shaped flange (4) has a longitudinal section arranged in a wedge shape, and the wedge-shaped flange (4) can be detachably arranged between the test flange (2) and the test bench (1) to adjust the loading angle.

4. The wind turbine blade testing device according to any one of claims 1 to 3, characterized in that: The test flange (2), the wedge-shaped flange (4) and the slewing bearing (3) all have special-shaped holes extending therethrough, and bolts are passed through the special-shaped holes. The bolts can fix the test flange (2) and at least one of the wedge-shaped flange (4), the slewing bearing (3) and the test bench (1), and only when the wedge-shaped flange (4) is connected between the test flange (2) and the test bench (1), the bolts are arranged at an angle to the axial direction of the special-shaped holes.

5. A wind turbine blade testing method, implemented in a wind turbine blade testing device as claimed in any one of claims 1 to 4, characterized in that: include: According to a preset rotation angle, one of a slewing bearing (3), a wedge-shaped flange (4) and a test flange (2) is selectively installed on a test bench (1); according to a preset loading angle, one of the wedge-shaped flange (4) and the test flange (2) is selectively installed on the test bench (1) or the slewing bearing (3); a wind turbine blade (100) is installed on the test flange (2), and the test flange (2) is connected to one of the wedge-shaped flange (4), the slewing bearing (3) and the test bench (1).

6. The wind turbine blade testing method according to claim 5, characterized in that: When the rotation angle is a first reference zero degree and the loading angle is a second reference zero degree, the test flange (2) is installed on the test bench (1).

7. The wind turbine blade testing method according to claim 5, characterized in that: When the rotation angle is a first reference zero degree and the loading angle is not a second reference zero degree, the test flange (2) is mounted on the wedge-shaped flange (4), and the wedge-shaped flange (4) is mounted on the test bench (1).

8. The wind turbine blade testing method according to claim 5, characterized in that: When the rotation angle is not the first reference zero degree and the loading angle is not the second reference zero degree, the test flange (2), the wedge flange (4), the slewing bearing (3) and the test bench (1) are connected in sequence.

9. The wind turbine blade testing method according to claim 5, characterized in that: When the rotation angle is not the first reference zero degree and the loading angle is the second reference zero degree, the test flange (2), the slewing bearing (3) and the test bench (1) are connected in sequence.

10. The wind turbine blade testing method according to claim 5, characterized in that: When the slewing bearing (3) is connected between the test bench (1) and the test flange (2), the rotation angle is adjusted by adjusting the rotation angle between the first part (31) and the second part (32) of the slewing bearing (3); or, When the wedge-shaped flange (4) is connected between the test bench (1) and the test flange (2), the loading angle is adjusted by adjusting the installation angle of the wedge-shaped flange (4) installed on the slewing bearing (3) or the test bench (1); or, When the slewing bearing (3) and the wedge-shaped flange (4) are connected between the test bench (1) and the test flange (2), the rotation angle and the loading angle are adjusted by adjusting the rotation angle between the first part (31) and the second part (32) of the slewing bearing (3), or the installation angle of the wedge-shaped flange (4) on the slewing bearing (3).