Three-station test system for wind power blade component

Abstract

The invention belongs to the technical field of fatigue test devices, and provides a three-station test system for wind power blade parts, which comprises a support assembly, which comprises a first vertical frame, a second vertical frame, an upper cross beam and a lower cross beam, and is characterized in that the upper cross beam and the lower cross beam are fixedly arranged between the first vertical frame and the second vertical frame; a dynamic test component; a static test component; a bending test assembly; by arranging the supporting assembly, the dynamic testing assembly, the static testing assembly and the bending testing assembly, the blade part is tested in the X direction, the Y direction and the Z direction, the complex stress environments of horizontal vibration, vertical bearing, transverse bending and the like borne by the blade in actual operation can be accurately simulated, the testing result is closer to the real working condition, and the testing efficiency is improved. The test efficiency is improved, the device can adapt to test pieces of different sizes, and powerful support is provided for research and development, quality verification and the like of wind power blades.

Description

Technical Field

[0001] The present invention belongs to the technical field of fatigue testing devices, and specifically relates to a three-station testing system for wind turbine blade components. Background Art

[0002] With the increase in the size of wind turbine blades and the lightweighting of materials, the blades need to withstand more complex stress environments, such as strong winds, low temperatures, and sand and dust. Traditional testing methods can no longer meet the R & D and quality verification requirements of new blades; the detection of wind turbine blade components relies on one-way testing, such as separately testing the performance in the X, Y, or Z directions, and it is difficult to simulate the multi-directional composite loads (such as horizontal vibration, lateral bending, and vertical pressure) that the blades bear during actual operation, resulting in a large deviation between the test results and the actual working conditions.

[0003] The existing testing devices detect wind turbine blade components by one-way testing, with poor testing flexibility and difficulty in reflecting the true usage state of the material under actual conditions, resulting in inaccurate test results.

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

[0005] In order to solve the above technical problems, the present invention provides a three-station testing system for wind turbine blade components to solve the problems that the existing testing devices detect wind turbine blade components by one-way testing, with poor testing flexibility and poor simulation effect.

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

[0007] A dynamic testing assembly, which includes a dynamic cylinder, a first positioning tooling, a first tooling seat, and a first clamping plate. The dynamic cylinder is installed on the outer wall of the first vertical frame, the first positioning tooling is installed at the telescopic end of the dynamic cylinder, the first tooling seat is installed on the inner wall of the second vertical frame, and the first clamping plate is slidably installed on the first tooling seat;

[0008] A static testing assembly, which includes a static cylinder, a second positioning tooling, a second tooling seat, and a second clamping plate. The static cylinder is installed on the outer wall of the first vertical frame, the second positioning tooling is installed at the telescopic end of the static cylinder, the first tooling seat is installed on the inner wall of the second vertical frame, and the first clamping plate is slidably installed on the first tooling seat;

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

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

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

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

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

[0014] Preferably, through grooves are provided on the side walls of the first positioning tooling and the second positioning tooling. A test piece is installed between the first positioning tooling and the first clamping plate; a test piece is installed between the second positioning tooling 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 slidably engaged with the upper crossbeam.

[0016] Preferably, a plurality of limiting rails are provided on the upper surface of the bending platform. The support seat is slidably limited 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] By setting up a support assembly, a dynamic test assembly, a static test assembly, and a bending test assembly, the present invention conducts tests on the blade component in three directions of X, Y, and Z respectively, can accurately simulate the complex stress environments such as horizontal vibration, vertical load bearing, and lateral bending that the blade bears during actual operation, makes the test results closer to the real working conditions, improves the test efficiency, can adapt to test pieces of different sizes, and provides strong support for the research and development, quality verification, etc. of wind turbine blades. Description of the Drawings

[0019] Figure 1 Schematic diagram of the overall structure of the present invention;

[0020] Figure 2 Schematic diagram of the top view structure of the present invention;

[0021] Figure 3 is Figure 2 Schematic diagram of the A-A sectional structure in

[0022] Figure 4 Schematic diagram of the three-dimensional structure on the right side of the present invention.

[0023] In the figure:

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

[0025] The following further describes the embodiments of the present invention in detail with reference to the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] Example 1: As shown in the attached Figure 1 to the attached Figure 4 shown: The present invention provides a three-station test system for wind turbine blade components, including a support assembly, a dynamic test assembly, a static test assembly, and a bending test assembly;

[0027] The support assembly includes a first vertical frame 1, a second vertical frame 2, an upper cross beam 3, and a lower cross beam 4. The upper cross beam 3 and the lower cross beam 4 are fixedly installed between the first vertical frame 1 and the second vertical frame 2;

[0028] The dynamic test component includes a dynamic cylinder 501, a first positioning tooling 502, a first tooling seat 506, and a first clamping plate 507. The dynamic cylinder 501 is installed at the outer wall of the first vertical frame 1. The first positioning tooling 502 is installed at the telescopic end of the dynamic cylinder 501. The first tooling seat 506 is installed on the inner wall of the second vertical frame 2. The first tooling seat 506 slidably installs the first clamping plate 507. A first ball seat 505 is installed between the dynamic cylinder 501 and the first positioning tooling 502. A first force measuring sensor 503 is arranged between the first ball seat 505 and the first positioning tooling 502. A second force measuring sensor 504 is installed on the inner wall of the first positioning tooling 502, and the position of the first tooling seat 506 corresponds to that of the first positioning tooling 502;

[0029] During dynamic testing, it is used to test the horizontal fatigue / static force of the blade; the workpiece is fixed by the first clamping plate 507. First, adjust the positions of the two groups of first clamping plates 507, clamp the workpiece through the two groups of first clamping plates 507, and then lock the first clamping plate 507 on the surface of the first tooling seat 506 through bolts to prevent the clamping plate from shifting; then lock and fix the workpiece through 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 measuring sensor 503 and the second force measuring sensor 504 respectively monitor the cylinder thrust and the contact force between the tooling and the test piece; the oil cylinder outputs a sine wave load to simulate the horizontal vibration or impact of the blade during operation.

[0030] Embodiment 2: The static test component includes a static cylinder 601, a second positioning tooling 602, a second tooling seat 606, and a second clamping plate 607. The static cylinder 601 is installed at the outer wall of the first vertical frame 1. The second positioning tooling 602 is installed at the telescopic end of the static cylinder 601. The first tooling seat 506 is installed on the inner wall of the second vertical frame 2. The first tooling seat 506 slidably installs the first clamping plate 507. A second ball seat 605 is installed between the static cylinder 601 and the second positioning tooling 602. A third force measuring sensor 603 is arranged between the second ball seat 605 and the second positioning tooling 602. A fourth force measuring sensor 604 is installed on the inner wall of the second positioning tooling 602, and the position of the second tooling seat 606 corresponds to that of the second positioning tooling 602.

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

[0032] Embodiment 3: The bending test assembly includes a bending platform 801, a support seat 802, and a bending cylinder 901. The bending platform 801 is fixed to the surface of the lower cross beam 4. Two groups of support seats 802 are slidably mounted on the upper surface of the bending platform 801. The bending cylinder 901 is mounted on the upper surface of the upper cross beam 3. An upper support roller 904 is mounted at the output end of the bending cylinder 901, and the position of the upper support roller 904 corresponds to that of the support seat 802. Two groups of bending baffles 803 are slidably mounted on the upper surface of the support seat 802, and a support roller 804 is mounted on the upper surface of the support seat 802. An upper support 903 is mounted at the telescopic end of the bending cylinder 901, and the upper support roller 904 is mounted 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, both ends of the test piece are fixed by the support seats 802, and the bending cylinder drives the upper support roller 904 to apply a vertical pressure to the middle of the test piece; 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 test piece.

[0034] Through grooves are provided on the side walls of both the first positioning tooling 502 and the second positioning tooling 602. A test piece is installed between the first positioning tooling 502 and the first clamping plate 507; a test piece is installed between the second positioning tooling 602 and the second clamping plate 607.

[0035] A number of limiting rods are fixed on the upper surface of the upper support 903, and the limiting rods are slidably engaged with the upper cross beam 3.

[0036] A number of limiting rails are provided on the upper surface of the bending platform 801, and the support seat 802 is slidably limited at the limiting 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 test station (X direction): A horizontal vibration or impact load is applied through the dynamic cylinder 501 to simulate the dynamic fatigue characteristics of the blade in a strong wind environment; the dynamic cylinder 501 is flexibly connected through the first ball seat 505 to avoid stress concentration; the first force sensor 503 and the second force sensor 504 respectively monitor the cylinder thrust and the test piece contact force.

[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 the installation deviation, 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 upper support roller 904 is driven by the bending cylinder 901 to apply a vertical pressure to the middle of the test piece, simulating the performance of the blade under bending load; the support seat 802 can be slidably adjusted in span, and the fifth force sensor 902 accurately records the bending force value.

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

[0042] The industrial control computer integrates multi-channel sensor data such as pulling force, pressure, deformation, and strain, and real-time displays the static force-displacement curve and the fatigue load time-domain curve, and stores data at a high frequency of 5 ms to ensure the accuracy of the test results.

[0043] The composite test is completed through three stations:

[0044] Apply a horizontal sine wave load to simulate wind vibration; apply a constant vertical load to test the bearing limit; apply a middle pressure to evaluate the bending resistance performance.

[0045] Through the integrated design of three stations (X / Y / Z directions), the composite test of horizontal vibration, vertical static load, and bending load is completed, accurately simulating the multi-directional stress state of the blade in the real environment, and solving the deviation problem of traditional single-direction testing; multi-stage force sensors (503 / 504 / 603 / 604 / 902) realize real-time monitoring and feedback of the load; through the collaborative design of three stations, high-precision sensing technology, and intelligent control system, the efficient and accurate testing of wind turbine blade components under composite loads is realized, significantly improving the authenticity and engineering applicability of the 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 purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and deformations to the above embodiments within the scope of the present invention.

[0047] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "plurality" is two or more unless otherwise specifically defined.

[0048] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0050] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 three-station testing system for wind turbine blade components, characterized in that, Including: A support component, which includes a first vertical frame (1), a second vertical frame (2), an upper cross beam (3) and a lower cross beam (4). The upper cross beam (3) and the lower cross beam (4) are fixedly installed between the first vertical frame (1) and the second vertical frame (2); A dynamic test component, which includes a dynamic cylinder (501), a first positioning tooling (502), a first tooling seat (506) and a first clamping plate (507). The dynamic cylinder (501) is installed on the outer wall of the first vertical frame (1). The first positioning tooling (502) is installed at the telescopic end of the dynamic cylinder (501). The first tooling seat (506) is installed on the inner wall of the second vertical frame (2), and the first clamping plate (507) is slidably installed on the first tooling seat (506); A static test component, which includes a static cylinder (601), a second positioning tooling (602), a second tooling seat (606) and a second clamping plate (607). The static cylinder (601) is installed on the outer wall of the first vertical frame (1). The second positioning tooling (602) is installed at the telescopic end of the static cylinder (601). The first tooling seat (506) is installed on the inner wall of the second vertical frame (2), and the first clamping plate (507) is slidably installed on the first tooling seat (506); A bending test component, which includes a bending platform (801), a support seat (802) and a bending cylinder (901). The bending platform (801) is fixed on the surface of the lower cross beam (4). Two groups of support seats (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 cross beam (3). The output end of the bending cylinder (901) is installed with an upper support roller (904), and the position of the upper support roller (904) corresponds to that of the support seat (802).

2. The three-station test system for a wind turbine blade component according to claim 1, characterized in that: A first ball seat (505) is installed between the dynamic cylinder (501) and the first positioning tooling (502). A first force measuring sensor (503) is arranged between the first ball seat (505) and the first positioning tooling (502). A second force measuring sensor (504) is installed on the inner wall of the first positioning tooling (502), and the position of the first tooling seat (506) corresponds to that of the first positioning tooling (502).

3. The three-station testing system for a wind turbine blade component according to claim 2, characterized in that: A second ball seat (605) is installed between the static cylinder (601) and the second positioning tooling (602). A third force measuring sensor (603) is arranged between the second ball seat (605) and the second positioning tooling (602). A fourth force measuring sensor (604) is installed on the inner wall of the second positioning tooling (602), and the position of the second tooling seat (606) corresponds to that of the second positioning tooling (602).

4. The three-station testing system for a wind turbine blade component according to claim 3, wherein: Two groups of bending baffles (803) are slidably installed on the upper surface of the support seat (802), and a support roller (804) is installed on the upper surface of the support seat (802). The telescopic end of the bending cylinder (901) is installed with an upper support seat (903), and the upper support roller (904) is installed on the inner bottom wall of the upper support seat (903).

5. The three-station test system for a wind turbine blade component according to claim 4, characterized in that: A fifth force measuring sensor (902) is arranged between the upper support seat (903) and the telescopic end of the bending cylinder (901).

6. The three-station test system for a wind turbine blade component according to claim 3, wherein: Through grooves are provided on the side walls of the first positioning tooling (502) and the second positioning tooling (602), and a test piece is installed between the first positioning tooling (502) and the first clamping plate (507); A test piece is installed between the second positioning tooling (602) and the second clamping plate (607).

7. The three-station test system for a wind turbine blade component according to claim 1, wherein: A number of limiting rods are fixed on the upper surface of the upper support (903), and the limiting rods are slidably matched with the upper cross beam (3).

8. The three-station test system for a wind turbine blade component according to claim 1, characterized in that: A number of limiting rails are provided on the upper surface of the bending platform (801), the support seat (802) is slidably limited at the limiting rails, and the support seat (802) is fixedly connected to the bending platform (801) by bolts.

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