Test blade section connecting structure with adjustable torsion center

Abstract

The invention provides a torsion center-adjustable test blade section connecting structure, which comprises a blade section body and a first guide sliding block, and first guide sliding grooves are formed in the surfaces of the two sides of the blade section body; the first guide sliding block is arranged in the first guide sliding groove in a sliding mode, and a positioning hole is formed in the first guide sliding block. The torsion center position of the test blade section connecting structure is adjusted by adjusting the position of the first guide sliding block in the first guide sliding groove. The problems that in the prior art, the torsion centers of blade sections are all fixed torsion centers, when the influence of the blade section torsion centers on the aeroelastic stability of a tested blade section connecting structure is researched, the blade sections with different torsion centers need to be machined for testing, and therefore the machining period and the machining cost are increased, and the machining cost is reduced are solved. And the economical efficiency of aeroelastic response characteristic measurement of the test blade section connecting structure under different torsion centers cannot be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation blades, and in particular to a test blade segment connection structure with an adjustable torsion center. Background Art

[0002] With the rapid development of the wind power industry, the demand for large blades and lightweight is increasing day by day. How to design wind turbine blades that meet the requirements of large scale and lightweight and have better performance has become an important research topic in the current wind power field. The flexibility of existing large blades is constantly increasing, which has a great impact on the load and performance of the blades. The errors caused by simulation tools are getting bigger and bigger, and it is necessary to understand and master their aeroelastic response characteristics through experiments. However, the full-scale experiment of large wind turbine blades is very expensive. In order to reduce the experimental cost and ensure the design reliability of the blades, it is necessary to carry out scaled blade design, manufacturing and experiments.

[0003] In order to study the influence of the torsion center of the blade section on the aeroelastic stability of the blade segment, it is necessary to process blade segments with different torsion centers for testing. However, since the processing size of such blade segments is small, the layer positioning and processing accuracy requirements are high, and processing different blades may bring about changes in other structural performance parameters, which is not conducive to performance comparison. At the same time, it increases the processing cycle and processing cost, and cannot ensure the economy of measuring the aeroelastic response characteristics of the blade segment under different torsion centers. Summary of the invention

[0004] The main purpose of the present invention is to provide a test blade segment connection structure with an adjustable torsion center, so as to solve the problem that the torsion center of the blade segments in the prior art are all fixed torsion centers. When studying the influence of the torsion center of the blade cross-section on the aeroelastic stability of the test blade segment connection structure, it is necessary to process blade segments with different torsion centers for testing. However, since the processing size of such blade segments is small, the layer positioning and processing accuracy requirements are high, processing different blades may bring about changes in other structural performance parameters, which is not conducive to performance comparison, and at the same time increases the processing cycle and processing cost, and cannot ensure the economic efficiency of measuring the aeroelastic response characteristics of the blade segments under different torsion centers.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a test blade segment connection structure with an adjustable torsional center, including a blade segment body and a first guide slide block, wherein a first guide slide groove is provided on both side surfaces of the blade segment body, and the first guide slide groove extends from the head to the tail of the blade segment body; the first guide slide block is slidably arranged in the first guide slide groove, and a positioning hole is provided on the first guide slide block for cooperating with a support shaft of a test device, so as to position and install the test blade segment connection structure on the test device through the cooperation between the positioning hole and the support shaft; wherein, the torsional center position of the test blade segment connection structure is adjusted by adjusting the position of the first guide slide block in the first guide slide groove.

[0006] In an exemplary embodiment, the first guide slider is detachably connected to the blade segment body.

[0007] In an exemplary embodiment, in a direction from the head to the tail of the blade segment body, the first guide groove extends along a straight line.

[0008] In an exemplary embodiment, scale lines are provided on the groove wall surface of the first guide groove so that the first guide sliding blocks on both sides can be adjusted to the same position at the same time.

[0009] In an exemplary embodiment, at least two side surfaces of the first guide slider in contact with the groove wall of the first guide groove are arc-shaped surfaces to reduce friction between the two side surfaces of the first guide slider and the groove wall of the first guide groove.

[0010] In an exemplary embodiment, the positioning hole is threadedly connected to the support shaft.

[0011] In an exemplary embodiment, the test blade segment connection structure also includes a limiting portion, which is slidably arranged on the two side surfaces of the blade segment body, and the sliding path of the limiting portion is consistent with the extension path of the first guide slide groove; wherein the limiting portion has a crimping end, so that when the first guide slide slides to a preset position, the limiting portion follows the first guide slide slide to a position opposite to the preset position, and the crimping end limits the first guide slide to prevent the first guide slide from continuing to slide.

[0012] In an exemplary embodiment, a second guide slot is provided on both side surfaces of the blade segment body, the second guide slot is spaced apart from the first guide slot and extends in the same direction, and each limiting portion includes a second guide slider, a guide rod and a limiting lock, wherein the second guide slider is slidably arranged in the second guide slot, and an avoidance hole is provided on the second guide slider, the avoidance hole passes through both ends of the second guide slider in the direction from the bottom of the second guide slot to the slot; the guide rod is passed through the avoidance hole and is threadedly connected to the avoidance hole; the first end of the limiting lock is connected to the guide rod, and the first end of the limiting lock is connected to the guide rod. The two ends are crimping ends, and the limit lock is rotated along the first direction to make the crimping end rotate to the first guide slot and crimp on the first guide slider, and the end of the guide rod away from the limit lock passes through the avoidance hole and abuts against the bottom surface of the second guide slot to prevent the limit part from continuing to slide; the limit lock is rotated along the second direction opposite to the first direction to make the crimping end withdraw from the first guide slot and release the crimping on the first guide slider, and the end of the guide rod away from the limit lock is retracted into the avoidance hole to release the abutment between the end of the guide rod away from the limit lock and the bottom surface of the second guide slot.

[0013] In an exemplary embodiment, one end of the guide rod away from the limit lock is an elastic abutment end.

[0014] In an exemplary embodiment, the limiting portion is detachably connected to the blade segment body.

[0015] By applying the technical solution of the present invention, there is provided a test blade segment connection structure with an adjustable torsional center, comprising a blade segment body and a first guide slide block, wherein first guide grooves are provided on both side surfaces of the blade segment body, and the first guide grooves extend from the head to the tail of the blade segment body; the first guide slide block is slidably arranged in the first guide groove, and a positioning hole is provided on the first guide slide block for cooperating with the support shaft of the test device, so as to position and install the test blade segment connection structure on the test device through the cooperation between the positioning hole and the support shaft; wherein the torsional center position of the test blade segment connection structure is adjusted by adjusting the position of the first guide slide block in the first guide groove.

[0016] By adjusting the position of the first guide slider in the first guide slot, the torsional center position of the test blade segment connection structure can be adjusted without additional processing of the test blade segment connection structure with different torsional centers, thereby ensuring the processing economy of the test blade segment connection structure and achieving the purpose of measuring the aeroelastic response characteristics of the test blade segment connection structure under different torsional centers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A perspective structural schematic diagram showing a test blade segment connection structure according to an optional embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram of a limit portion of a test blade segment connection structure according to an optional embodiment of the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. blade segment body; 11. first guide chute; 12. second guide chute;

[0022] 20. First guide slider; 21. Positioning hole;

[0023] 30. Limiting portion; 31. Second guide slider; 311. Avoidance hole; 32. Guide rod; 33. Limiting lock. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to solve the problem that the torsional centers of blade segments in the prior art are all fixed torsional centers, when studying the influence of the torsional center of the blade cross-section on the aeroelastic stability of the test blade segment connection structure, it is necessary to process blade segments with different torsional centers for testing. However, since the processing size of such blade segments is small, the layer positioning and processing accuracy requirements are high, and processing different blades may bring about changes in other structural performance parameters, which is not conducive to performance comparison, and at the same time increases the processing cycle and processing cost, and cannot ensure the economic efficiency of measuring the aeroelastic response characteristics of the blade segments under different torsional centers. The present invention provides a test blade segment connection structure with an adjustable torsional center.

[0026] like Figure 1 and Figure 2 As shown, a test blade segment connection structure with an adjustable torsional center includes a blade segment body 10 and a first guide slide block 20, wherein first guide grooves 11 are provided on both side surfaces of the blade segment body 10, and the first guide grooves 11 extend from the head to the tail of the blade segment body 10; the first guide slide block 20 is slidably arranged in the first guide groove 11, and a positioning hole 21 for cooperating with a support shaft of a test device is provided on the first guide slide block 20, so as to position and install the test blade segment connection structure on the test device through the cooperation between the positioning hole 21 and the support shaft; wherein the torsional center position of the test blade segment connection structure is adjusted by adjusting the position of the first guide slide block 20 in the first guide groove 11.

[0027] By adjusting the position of the first guide slider 20 in the first guide slot 11, the torsional center position of the test blade segment connection structure can be adjusted without additional processing of the test blade segment connection structure with different torsional centers, thereby ensuring the processing economy of the test blade segment connection structure and achieving the purpose of measuring the aeroelastic response characteristics of the test blade segment connection structure under different torsional centers.

[0028] It should be noted that, in the present application, the first guide slider 20 is detachably connected to the blade segment body 10. In this way, the convenience of installation and disassembly between the first guide slider 20 and the blade segment body 10 is ensured.

[0029] like Figure 1As shown, the first guide slot 11 extends in a straight line in the direction from the head to the tail of the blade segment body 10. In this way, the reliability of adjusting the torsion center of the test blade segment connection structure is ensured.

[0030] It should be noted that in an embodiment of the present application which is not shown in the figure, in order to ensure that the two first guide sliders 20 on both sides of the blade segment body 10 can slide to the same position of the first guide slots 11 corresponding to each other at the same time, preferably, scale lines are provided on the slot wall surface of the first guide slot 11, so that the first guide sliders 20 on both sides can be adjusted to the same position at the same time. In this way, the sliding accuracy and sliding reliability of the two first guide sliders 20 on both sides of the blade segment body 10 are ensured, and the convenience of adjusting the torsion center position of the test blade segment connection structure is greatly reduced.

[0031] It should be noted that, in an embodiment of the present application not shown in the figure, in order to reduce the friction between the first guide slider 20 and the groove wall surface of the first guide slot 11 as much as possible, optionally, at least the two side surfaces of the first guide slider 20 contacting the groove wall surface of the first guide slot 11 are arc-shaped surfaces to reduce the friction between the two side surfaces of the first guide slider 20 and the groove wall surface of the first guide slot 11. In this way, the sliding stability and sliding reliability of the first guide slider 20 in the first guide slot 11 are ensured.

[0032] It should be noted that, in the present application, the positioning hole 21 is threadedly connected to the support shaft. In this way, the connection reliability between the support shaft and the test blade segment connection structure is ensured, thereby ensuring the reliability of the positioning and installation of the test blade segment connection structure on the support shaft, ensuring that the test blade segment connection structure can move with the support shaft during subsequent tests, thereby ensuring the reliability of the measurement of the aeroelastic response characteristics of the test blade segment connection structure under different torsion centers.

[0033] like Figure 2 As shown, the test blade segment connection structure also includes a limiting portion 30, which is slidably arranged on the two side surfaces of the blade segment body 10, and the sliding path of the limiting portion 30 is consistent with the extension path of the first guide slot 11; wherein, the limiting portion 30 has a crimping end, so that when the first guide slider 20 slides to the preset position, the limiting portion 30 follows the first guide slider 20 to slide to a position opposite to the preset position, and the crimping end limits the first guide slider 20 to prevent the first guide slider 20 from continuing to slide. In this way, the setting of the limiting portion 30 plays a role in the crimping reliability of the first guide slider 20, ensuring that the first guide slider 20 can be temporarily fixed at the position after sliding into place, thereby ensuring the accuracy of the subsequent measurement of the aeroelastic response characteristics of the test blade segment connection structure under different torsion centers.

[0034] Furthermore, if Figure 2As shown, second guide slots 12 are provided on both side surfaces of the blade segment body 10, and the second guide slots 12 are spaced apart from the first guide slots 11 and extend in the same direction, and each limiting portion 30 includes a second guide slider 31, a guide rod 32 and a limiting lock 33, wherein the second guide slider 31 is slidably arranged in the second guide slot 12, and an avoidance hole 311 is provided on the second guide slider 31, and the avoidance hole 311 passes through both ends of the second guide slider 31 in the direction from the bottom of the second guide slot 12 to the notch; the guide rod 32 is passed through the avoidance hole 311 and is threadedly connected to the avoidance hole 311; the first end of the limiting lock 33 is connected to the guide rod 32, and the limiting lock 33 The second end is a crimping end, and the limit lock 33 is rotated along the first direction to make the crimping end rotate to the first guide slot 11 and crimped to the first guide slider 20, and the end of the guide rod 32 away from the limit lock 33 passes through the avoidance hole 311 and abuts against the bottom surface of the second guide slot 12 to prevent the limit part 30 from continuing to slide; the limit lock 33 is rotated along the second direction opposite to the first direction to make the crimping end withdraw from the first guide slot 11 and release the crimping on the first guide slider 20, and the end of the guide rod 32 away from the limit lock 33 is retracted into the avoidance hole 311 to release the abutment between the end of the guide rod 32 away from the limit lock 33 and the bottom surface of the second guide slot 12. In this way, by setting the limiting part 30 to a structural form including a second guide slider 31, a guide rod 32 and a limiting lock 33, while ensuring the sliding reliability of the limiting part 30 in the second guide slot 12, it is also possible to ensure the crimping reliability of the crimping end of the limiting part 30 to the first guide slider 20, and by the end of the guide rod 32 away from the limiting lock 33 passing through the avoidance hole 311 and abutting against the bottom surface of the second guide slot 12, the limiting part 30 is prevented from continuing to slide, thereby ensuring the reliability of the constraint of the limiting part 30 on the first guide slider 20.

[0035] It should be noted that, in the present application, the end of the guide rod 32 away from the limit lock 33 is an elastic abutment end. Thus, by setting the end of the guide rod 32 away from the limit lock 33 as an elastic abutment end, it is helpful to increase the abutment friction between the end of the guide rod 32 away from the limit lock 33 and the bottom surface of the second guide slot 12, thereby ensuring the abutment reliability between the two.

[0036] It should be noted that, in the present application, the limiting portion 30 is detachably connected to the blade segment body 10 , so as to ensure the convenience of installation and disassembly between the limiting portion 30 and the blade segment body 10 .

[0037] By applying the technical solution of the present invention, there is provided a test blade segment connection structure with an adjustable torsion center, comprising a blade segment body 10 and a first guide slide block 20, wherein first guide grooves 11 are provided on both side surfaces of the blade segment body 10, and the first guide grooves 11 extend from the head to the tail of the blade segment body 10; the first guide slide block 20 is slidably arranged in the first guide groove 11, and a positioning hole 21 for cooperating with a support shaft of a test device is provided on the first guide slide block 20, so as to position and install the test blade segment connection structure on the test device through the cooperation between the positioning hole 21 and the support shaft; wherein the torsion center position of the test blade segment connection structure is adjusted by adjusting the position of the first guide slide block 20 in the first guide groove 11.

[0038] By adjusting the position of the first guide slider 20 in the first guide slot 11, the torsional center position of the test blade segment connection structure can be adjusted without additional processing of the test blade segment connection structure with different torsional centers, thereby ensuring the processing economy of the test blade segment connection structure and achieving the purpose of measuring the aeroelastic response characteristics of the test blade segment connection structure under different torsional centers.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test blade segment connection structure with adjustable torsion center, characterized in that: include: A blade segment body (10), wherein first guide grooves (11) are provided on both side surfaces of the blade segment body (10), and the first guide grooves (11) extend from the head to the tail of the blade segment body (10); a first guide slider (20), the first guide slider (20) being slidably disposed in the first guide slot (11), and the first guide slider (20) being provided with a positioning hole (21) for cooperating with a support shaft of a test device, so as to position and install the test blade segment connection structure on the test device through the cooperation between the positioning hole (21) and the support shaft; The torsional center position of the test blade segment connection structure is adjusted by adjusting the position of the first guide sliding block (20) in the first guide sliding groove (11).

2. The test blade segment connection structure according to claim 1, characterized in that: The first guide slide block (20) is detachably connected to the blade segment body (10).

3. The test blade segment connection structure according to claim 1, characterized in that: In the direction from the head to the tail of the blade segment body (10), the first guide slot (11) extends along a straight line.

4. The test blade segment connection structure according to claim 1, characterized in that: Graduation lines are arranged on the groove wall surface of the first guide sliding groove (11) so that the first guide sliding blocks (20) on both sides can be adjusted to the same position at the same time.

5. The test blade segment connection structure according to claim 1, characterized in that: At least the two side surfaces of the first guide slider (20) in contact with the groove wall surface of the first guide groove (11) are arc-shaped surfaces to reduce the friction between the two side surfaces of the first guide slider (20) and the groove wall surface of the first guide groove (11).

6. The test blade segment connection structure according to claim 1, characterized in that: The positioning hole (21) is threadedly connected to the support shaft.

7. The test blade segment connection structure according to any one of claims 1 to 6, characterized in that: The test leaf segment connection structure also includes: a limiting portion (30), the limiting portion (30) being slidably disposed on the two side surfaces of the blade segment body (10), the sliding path of the limiting portion (30) being consistent with the extension path of the first guide slot (11); The limiting portion (30) has a crimping end, so that when the first guide slider (20) slides to a preset position, the limiting portion (30) follows the first guide slider (20) to slide to a position opposite to the preset position, and the crimping end limits the first guide slider (20) to prevent the first guide slider (20) from continuing to slide.

8. The test blade segment connection structure according to claim 7, characterized in that: Second guide slots (12) are provided on both side surfaces of the blade segment body (10), the second guide slots (12) and the first guide slots (11) are spaced apart and extend in the same direction, and each of the limiting portions (30) comprises: A second guide slider (31), the second guide slider (31) being slidably disposed in the second guide slot (12), and the second guide slider (31) being provided with an avoidance hole (311), the avoidance hole (311) penetrating through both ends of the second guide slider (31) in a direction from the slot bottom to the slot opening of the second guide slot (12); A guide rod (32), the guide rod (32) being inserted through the avoidance hole (311) and being threadedly connected to the avoidance hole (311); A limit lock (33), wherein a first end of the limit lock (33) is connected to the guide rod (32), and a second end of the limit lock (33) is the crimping end, and the limit lock (33) is rotated in a first direction so that the crimping end is rotated to the first guide slot (11) and crimped to the first guide slider (20), and an end of the guide rod (32) away from the limit lock (33) passes through the avoidance hole (311) and abuts against the bottom surface of the second guide slot (12), so as to prevent the limit portion (30) from continuing to slide; The limit lock (33) is rotated in a second direction opposite to the first direction so that the crimping end is withdrawn from the first guide slot (11) and the crimping on the first guide slider (20) is released, and the end of the guide rod (32) away from the limit lock (33) is retracted into the avoidance hole (311) to release the abutment between the end of the guide rod (32) away from the limit lock (33) and the bottom surface of the second guide slot (12).

9. The test blade segment connection structure according to claim 8, characterized in that: One end of the guide rod (32) away from the limit lock (33) is an elastic abutment end.

10. The test blade segment connection structure according to claim 7, characterized in that: The limiting portion (30) is detachably connected to the blade segment body (10).

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