A three-station test system for a wind turbine blade component

Abstract

This invention belongs to the technical field of fatigue testing devices and provides a three-station testing system for wind turbine blade components. The system includes: a support assembly comprising a first upright, a second upright, an upper crossbeam, and a lower crossbeam, with the upper and lower crossbeams fixedly installed between the first and second uprights; a dynamic testing assembly; a static testing assembly; and a bending testing assembly. By setting up the support assembly, dynamic testing assembly, static testing assembly, and bending testing assembly, this invention conducts tests on the blade components in the X, Y, and Z directions respectively. It can accurately simulate the complex stress environment experienced by the blade during actual operation, such as horizontal vibration, vertical load, and lateral bending, making the test results closer to real-world conditions, improving testing efficiency, and adapting to specimens of different sizes. This provides strong support for the research and development and quality verification of wind turbine blades.

Description

Technical Field

[0001] This invention belongs to the field of fatigue testing device technology, specifically a three-station testing system for wind turbine blade components. Background Technology

[0002] As wind turbine blades become larger and materials become lighter, they need to withstand more complex stress environments, such as strong winds, low temperatures, and dust storms. Traditional testing methods can no longer meet the needs of R&D and quality verification for new blades. Wind turbine blade component testing relies on unidirectional testing, such as testing the performance in the X, Y, or Z directions alone. This makes it difficult to simulate the multi-directional composite loads (such as horizontal vibration, lateral bending, and vertical pressure) that the blades experience in actual operation, resulting in a large deviation between the test results and the actual operating conditions.

[0003] Existing testing equipment tests wind turbine blade components in a single direction, which is not very flexible and makes it difficult to reflect the actual usage condition of the materials under real-world conditions, resulting in inaccurate test results.

[0004] To address the problems raised in the background art, those skilled in the art have proposed a three-station testing system for wind turbine blade components. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a three-station testing system for wind turbine blade components, which solves the problem that existing testing devices test wind turbine blade components in a single direction, resulting in poor testing flexibility and poor simulation effects.

[0006] A three-station testing system for wind turbine blade components includes: a support assembly, which includes a first upright, a second upright, an upper crossbeam and a lower crossbeam, wherein the upper crossbeam and the lower crossbeam are fixedly installed between the first upright and the second upright;

[0007] A dynamic testing assembly includes a dynamic cylinder, a first positioning fixture, a first fixture seat, and a first clamping plate. The dynamic cylinder is installed on the outer wall of a first upright, the first positioning fixture is installed on the telescopic end of the dynamic cylinder, the first fixture seat is installed on the inner wall of a second upright, and the first clamping plate is slidably installed on the first fixture seat.

[0008] A static testing assembly includes a static cylinder, a second positioning fixture, a second fixture seat, and a second clamping plate. The static cylinder is installed on the outer wall of a first upright, the second positioning fixture is installed on the telescopic end of the static cylinder, the first fixture seat is installed on the inner wall of the second upright, and the first clamping plate is slidably installed on the first fixture seat.

[0009] A bending test assembly includes a bending platform, support seats, and a bending cylinder. The bending platform is fixed to the surface of the lower crossbeam. Two sets of support seats are slidably installed on the upper surface of the bending platform. The bending cylinder is installed on the upper surface of the upper crossbeam. An upper support roller is installed at the output end of the bending cylinder, and the position of the upper support roller corresponds to that of the support seats.

[0010] Preferably, a first ball seat is installed between the dynamic cylinder and the first positioning fixture, a first force sensor is provided between the first ball seat and the first positioning fixture, a second force sensor is installed on the inner wall of the first positioning fixture, and the position of the first fixture seat corresponds to the first positioning fixture.

[0011] Preferably, a second ball seat is installed between the static cylinder and the second positioning fixture, a third force sensor is provided between the second ball seat and the second positioning fixture, a fourth force sensor is installed on the inner wall of the second positioning fixture, and the position of the second fixture seat corresponds to the second positioning fixture.

[0012] Preferably, two sets of bending baffles are slidably installed on the upper surface of the support base, and a support roller is installed on the upper surface of the support base. An upper support is installed at the telescopic end of the bending cylinder, and an upper support roller is installed on the inner bottom wall of the upper support.

[0013] Preferably, a fifth force sensor is provided between the upper support and the telescopic end of the bending cylinder.

[0014] Preferably, both the first positioning fixture and the second positioning fixture have through grooves on their side walls. The test piece is installed between the first positioning fixture and the first clamping plate; the test piece is installed between the second positioning fixture and the second clamping plate.

[0015] Preferably, a plurality of limiting rods are fixed on the upper surface of the upper support, and the limiting rods are in sliding engagement with the upper crossbeam.

[0016] Preferably, the upper surface of the bending platform is provided with several limiting rails, the support seat slides at the limiting rails, and the support seat is fixedly connected to the bending platform by bolts.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention, by setting up support components, dynamic testing components, static testing components, and bending testing components, conducts tests on blade components in the X, Y, and Z directions respectively. It can accurately simulate the complex stress environment that the blade is subjected to in actual operation, such as horizontal vibration, vertical load, and lateral bending. This makes the test results closer to the real working conditions, improves the testing efficiency, and can be adapted to specimens of different sizes, providing strong support for the research and development and quality verification of wind turbine blades. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top view schematic diagram of the structure of the present invention;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section;

[0022] Figure 4 This is a three-dimensional structural diagram of the right side of the present invention.

[0023] In the picture:

[0024] 1. First upright; 2. Second upright; 3. Upper crossbeam; 4. Lower crossbeam; 501. Dynamic cylinder; 502. First positioning fixture; 503. First force sensor; 504. Second force sensor; 505. First ball seat; 506. First fixture seat; 507. First clamping plate; 601. Static cylinder; 602. Second positioning fixture; 603. Third force sensor; 604. Fourth force sensor; 605. Second ball seat; 606. Second fixture seat; 607. Second clamping plate; 801. Bending platform; 802. Support seat; 803. Bending baffle; 804. Support roller; 901. Bending cylinder; 902. Fifth force sensor; 903. Upper support; 904. Upper support roller. Detailed Implementation

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0026] Example 1: As shown in the attached document Figure 1 To be continued Figure 4 As shown: This invention provides a three-station testing system for wind turbine blade components, including a support assembly, a dynamic testing assembly, a static testing assembly, and a bending testing assembly;

[0027] The support assembly includes a first upright 1, a second upright 2, an upper crossbeam 3, and a lower crossbeam 4, with the upper crossbeam 3 and the lower crossbeam 4 fixedly installed between the first upright 1 and the second upright 2;

[0028] The dynamic testing assembly includes a dynamic cylinder 501, a first positioning fixture 502, a first fixture base 506, and a first clamping plate 507. The dynamic cylinder 501 is installed on the outer wall of the first upright 1, the first positioning fixture 502 is installed on the telescopic end of the dynamic cylinder 501, the first fixture base 506 is installed on the inner wall of the second upright 2, the first fixture base 506 is slidably installed with the first clamping plate 507, a first ball seat 505 is installed between the dynamic cylinder 501 and the first positioning fixture 502, a first force sensor 503 is provided between the first ball seat 505 and the first positioning fixture 502, a second force sensor 504 is installed on the inner wall of the first positioning fixture 502, and the position of the first fixture base 506 corresponds to that of the first positioning fixture 502.

[0029] During dynamic testing, the blade's horizontal fatigue / static force is tested. The workpiece is fixed by the first clamping plate 507. First, the positions of the two sets of first clamping plates 507 are adjusted, and the workpiece is clamped by the two sets of first clamping plates 507. Then, the first clamping plates 507 are locked on the surface of the first tooling seat 506 by bolts to prevent displacement of the clamping plates. The workpiece is then locked and fixed by the screw holes on the surface of the first clamping plate 507. The dynamic cylinder 501 is flexibly connected to the first positioning tooling through the first ball seat 505 to avoid rigid stress concentration. The first force sensor 503 and the second force sensor 504 monitor the cylinder thrust and the contact force between the tooling and the workpiece, respectively. The cylinder outputs a sinusoidal load to simulate the horizontal vibration or impact of the blade during operation.

[0030] Example 2: The static testing assembly includes a static cylinder 601, a second positioning fixture 602, a second fixture base 606, and a second clamping plate 607. The static cylinder 601 is installed on the outer wall of the first upright 1. The second positioning fixture 602 is installed on the telescopic end of the static cylinder 601. The first fixture base 506 is installed on the inner wall of the second upright 2. The first clamping plate 507 is slidably installed on the first fixture base 506. A second ball seat 605 is installed between the static cylinder 601 and the second positioning fixture 602. A third force sensor 603 is provided between the second ball seat 605 and the second positioning fixture 602. A fourth force sensor 604 is installed on the inner wall of the second positioning fixture 602. The position of the second fixture base 606 corresponds to that of the second positioning fixture 602.

[0031] During static testing, the same installation method as for dynamic testing is adopted. The test piece is installed between the second positioning fixture 602 and the second clamping plate 607. The static cylinder 601 is connected to the second positioning fixture 602 through the second ball seat 605 to eliminate the influence of installation deviation. The third force sensor 603 and the fourth force sensor 604 measure the cylinder thrust and the test piece bearing capacity, respectively. The hydraulic cylinder applies a constant load to test the vertical bearing capacity of the blade under its own weight or extreme working conditions.

[0032] Example 3: The bending test assembly includes a bending platform 801, a support base 802, and a bending cylinder 901. The bending platform 801 is fixed to the surface of the lower crossbeam 4. Two sets of support bases 802 are slidably installed on the upper surface of the bending platform 801. The bending cylinder 901 is installed on the upper surface of the upper crossbeam 3. An upper support roller 904 is installed at the output end of the bending cylinder 901, and the position of the upper support roller 904 corresponds to that of the support base 802. Two sets of bending baffles 803 are slidably installed on the upper surface of the support base 802, and the support roller 804 is installed on the upper surface of the support base 802. An upper support 903 is installed at the telescopic end of the bending cylinder 901, and the upper support roller 904 is installed on the inner bottom wall of the upper support 903. A fifth force sensor 902 is provided between the upper support 903 and the telescopic end of the bending cylinder 901.

[0033] During the bending test, the two ends of the specimen are fixed by the support seat 802, and the bending cylinder drives the upper support roller 904 to apply vertical pressure to the middle of the specimen; the fifth force sensor 902 monitors the bending load in real time, and the support roller 804 and the bending baffle 803 adjust the span and constraint form of the specimen.

[0034] Both the first positioning fixture 502 and the second positioning fixture 602 have through grooves on their side walls. The test piece is installed between the first positioning fixture 502 and the first clamping plate 507; the test piece is installed between the second positioning fixture 602 and the second clamping plate 607.

[0035] Several limiting rods are fixed on the upper surface of the upper support 903, and the limiting rods slide with the upper crossbeam 3.

[0036] The upper surface of the bending platform 801 is provided with several limit rails, and the support seat 802 slides at the limit rails. The support seat 802 is fixedly connected to the bending platform 801 by bolts.

[0037] As can be seen from the above, the working principle is as follows:

[0038] Dynamic testing station (X direction): Horizontal vibration or impact load is applied through dynamic cylinder 501 to simulate the dynamic fatigue characteristics of the blade in a strong wind environment; dynamic cylinder 501 is flexibly connected through first ball seat 505 to avoid stress concentration; first force sensor 503 and second force sensor 504 monitor cylinder thrust and specimen contact force respectively.

[0039] Static test station (Y direction): A constant vertical load is applied by the static cylinder 601 to test the static load bearing capacity of the blade under extreme working conditions; the second ball seat 605 eliminates installation deviations, and the third force sensor 603 and the fourth force sensor 604 monitor the load distribution in real time.

[0040] Bending test station (Z direction): The bending cylinder 901 drives the upper support roller 904 to apply vertical pressure to the middle of the specimen to simulate the performance of the blade under bending load; the support seat 802 can slide to adjust the span, and the fifth force sensor 902 accurately records the bending force value.

[0041] The XYZ three-way hydraulic cylinders (dynamic cylinder, static cylinder, and bending cylinder) are driven by a variable displacement piston pump and achieve precise load control through a proportional servo directional valve. The hydraulic circuit has overload protection and power-off unloading functions to ensure testing safety.

[0042] The industrial control computer integrates multi-channel sensor data for tension, compression, deformation, strain, etc., and displays static-displacement curves and fatigue load time-domain curves in real time. It also stores data at a high frequency of 5ms to ensure the accuracy of test results.

[0043] Try to complete the composite test through three workstations:

[0044] Apply a horizontal sinusoidal load to simulate wind-induced vibration; apply a constant vertical load to test the bearing capacity limit; apply a mid-section pressure to evaluate the bending performance.

[0045] Through a three-station integrated design (X / Y / Z directions), composite testing of horizontal vibration, vertical static load, and bending load is completed, accurately simulating the multi-directional stress state of the blade in a real environment and solving the deviation problem of traditional single-direction testing. Multi-level force sensors (503 / 504 / 603 / 604 / 902) enable real-time monitoring and feedback of loads. Through the three-station collaborative design, high-precision sensing technology, and intelligent control system, efficient and accurate testing of wind turbine blade components under composite loads is achieved, significantly improving the authenticity and engineering applicability of test results and providing reliable technical support for the research and development and quality verification of large blades.

[0046] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0047] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] The accompanying drawings of the embodiments disclosed in this invention only involve structures related to the embodiments disclosed in this invention. Other structures can refer to general designs. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-station testing system for wind turbine blade components, characterized in that, include: The support assembly includes a first upright (1), a second upright (2), an upper crossbeam (3) and a lower crossbeam (4), with the upper crossbeam (3) and the lower crossbeam (4) fixedly installed between the first upright (1) and the second upright (2). A dynamic testing assembly includes a dynamic cylinder (501), a first positioning fixture (502), a first fixture seat (506), and a first clamping plate (507). The dynamic cylinder (501) is installed on the outer wall of the first upright (1), the first positioning fixture (502) is installed on the telescopic end of the dynamic cylinder (501), the first fixture seat (506) is installed on the inner wall of the second upright (2), and the first clamping plate (507) is slidably installed on the first fixture seat (506). A first ball seat (505) is installed between the dynamic cylinder (501) and the first positioning fixture (502), a first force sensor (503) is provided between the first ball seat (505) and the first positioning fixture (502), a second force sensor (504) is installed on the inner wall of the first positioning fixture (502), and the position of the first fixture seat (506) corresponds to that of the first positioning fixture (502). A static testing assembly includes a static cylinder (601), a second positioning fixture (602), a second fixture seat (606), and a second clamping plate (607). The static cylinder (601) is installed on the outer wall of a first upright (1), the second positioning fixture (602) is installed on the telescopic end of the static cylinder (601), the first fixture seat (506) is installed on the inner wall of the second upright (2), and the first clamping plate (507) is slidably installed on the first fixture seat (506). A second ball seat (605) is installed between the static cylinder (601) and the second positioning fixture (602), a third force sensor (603) is provided between the second ball seat (605) and the second positioning fixture (602), a fourth force sensor (604) is installed on the inner wall of the second positioning fixture (602), and the position of the second fixture seat (606) corresponds to that of the second positioning fixture (602). The bending test assembly includes a bending platform (801), a support base (802), and a bending cylinder (901). The bending platform (801) is fixed to the surface of the lower crossbeam (4). Two sets of support bases (802) are slidably installed on the upper surface of the bending platform (801). The bending cylinder (901) is installed on the upper surface of the upper crossbeam (3). An upper support roller (904) is installed at the output end of the bending cylinder (901). The position of the upper support roller (904) corresponds to that of the support base (802). Two sets of bending baffles (803) are slidably installed on the upper surface of the support base (802). The support roller (804) is installed on the upper surface of the support base (802). An upper support base (903) is installed at the telescopic end of the bending cylinder (901). The upper support roller (904) is installed on the inner bottom wall of the upper support base (903).

2. The three-station testing system for wind turbine blade components as described in claim 1, characterized in that: A fifth force sensor (902) is provided between the upper support (903) and the telescopic end of the bending cylinder (901).

3. The three-station testing system for wind turbine blade components as described in claim 1, characterized in that: Both the first positioning fixture (502) and the second positioning fixture (602) have through grooves on their side walls. The test piece is installed between the first positioning fixture (502) and the first clamping plate (507); the test piece is installed between the second positioning fixture (602) and the second clamping plate (607).

4. The three-station testing system for wind turbine blade components as described in claim 1, characterized in that: The upper surface of the upper support (903) is fixed with several limiting rods, and the limiting rods are in sliding fit with the upper crossbeam (3).

5. The three-station testing system for wind turbine blade components as described in claim 1, characterized in that: The upper surface of the bending platform (801) is provided with several limiting rails, and the support seat (802) slides at the limiting rails. The support seat (802) is fixedly connected to the bending platform (801) by bolts.

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