Lightning stroke simulation test device for glass fiber reinforced composite material

Abstract

The utility model discloses a lightning stroke simulation test device for a glass fiber reinforced composite material, and the device comprises a bearing platform which is provided with a platform surface for placing a to-be-tested composite material; an observation opening is formed in the middle of the conducting ring plate, the inner edge of the conducting ring plate abuts against the outer edge of the composite material in a pressing mode, and a plurality of pulling assemblies are installed between the outer edge of the conducting ring plate and the table top; the electrode bar is erected above the observation opening, a conductive wire is installed at the lower end of the electrode bar, and the conductive wire is erected above the composite material; the output end of the lightning surge generator is connected to the electrode bar, and the grounding end of the lightning surge generator is connected to the conductive ring plate. According to the utility model, the problem that the lightning protection design method of the power transmission line cannot be directly applied to the fan blade of the wind turbine generator is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blades of wind turbines, and particularly relates to a simulated lightning strike test device for glass fiber reinforced composite materials. Background Art

[0002] The fan blades of wind turbines are vulnerable to lightning strikes due to their high height, resulting in huge economic losses. Studying the lightning attachment characteristics of fan blades and their protection methods is a difficult problem that the current wind power industry urgently needs to solve. Moreover, there is relatively little research on preventing direct lightning strikes on wind turbines, and basically, the lightning protection design methods of transmission lines and towers are referred to. Since there are certain differences between the lightning protection of wind turbines and that of transmission lines, the laws on transmission lines may not be directly applied to the lightning protection design of wind turbines. Content of the Utility Model

[0003] In order to overcome the defects of the prior art, the present utility model provides a simulated lightning strike test device for glass fiber reinforced composite materials to solve the problem that the lightning protection design method of transmission lines may not be directly applicable to the fan blades of wind turbines.

[0004] To achieve the above object, a simulated lightning strike test device for glass fiber reinforced composite materials is provided, including:

[0005] A bearing platform, which has a tabletop for placing the composite material to be tested;

[0006] A conductive ring plate, which has an observation opening in the middle, the inner edge of the conductive ring plate presses against the outer edge of the composite material, and multiple tension components are installed between the outer edge of the conductive ring plate and the tabletop;

[0007] An electrode rod, which is erected above the observation opening, a conducting wire is installed at the lower end of the electrode rod, and the conducting wire presses against the composite material;

[0008] A lightning strike surge generator, the output end of the lightning strike surge generator is connected to the electrode rod, and the grounding end of the lightning strike surge generator is connected to the conductive ring plate.

[0009] Further, the conductive ring plate is an iron plate.

[0010] Further, the conductive ring plate is rectangular, and the shape of the observation opening is adapted to the shape of the conductive ring plate.

[0011] Further, the tension component includes:

[0012] A guide rod, which is vertically arranged on the tabletop, the conductive ring plate is provided with a through hole, and the guide rod slides in the through hole;

[0013] The fastener is adjustably mounted on the guide rod and presses against the top of the conductive ring plate.

[0014] Furthermore, an external thread is formed at the upper end of the guide rod, a threaded hole is provided on the fastener, and the fastener is screwed onto the upper end of the guide rod.

[0015] Furthermore, the electrode rod is mounted above the observation port through a portal frame.

[0016] Furthermore, the distance between the lowest end of the conducting wire and the upper surface of the composite material is 10 - 20 mm.

[0017] The beneficial effect of the present utility model lies in that the simulated lightning strike test device for glass fiber reinforced composite materials of the present utility model firmly locks the composite material to be tested through the conductive ring plate and the bearing platform, connects the lightning strike surge generator with the electrode rod to simulate lightning strikes, generates high - energy surges, and then conducts simulated lightning strike tests on the composite material. The simulated lightning strike test device for glass fiber reinforced composite materials of the present utility model can conveniently and suitably conduct lightning strike tests on the glass fiber reinforced composite materials of the fan blades of wind turbines. Description of the Drawings

[0018] By reading the detailed description of the non - restrictive embodiments with reference to the following drawings, other features, objectives, and advantages of the present application will become more obvious:

[0019] Figure 1 It is a schematic structural diagram of the simulated lightning strike test device for glass fiber reinforced composite materials according to an embodiment of the present utility model.

[0020] Figure 2 It is a schematic diagram of the use state of the simulated lightning strike test device for glass fiber reinforced composite materials according to an embodiment of the present utility model. Detailed Embodiment

[0021] The following further elaborates on the present application in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model and do not limit the utility model. Additionally, it should be noted that for the sake of description, only the parts related to the utility model are shown in the drawings.

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will detail the present application with reference to the drawings and embodiments.

[0023] Refer to Figure 1 and Figure 2As shown in the figure, the present utility model provides a simulated lightning strike test device for glass fiber reinforced composite materials, including: a bearing platform 1, a conductive ring plate 2, an electrode rod 3, and a lightning impulse generator 4.

[0024] The bearing platform 1 has a tabletop for placing the composite material 5 to be tested.

[0025] In this embodiment, the bearing platform 1 is rectangular. Legs are installed at the four corners of the bearing platform.

[0026] The conductive ring plate 2 is a conductive metal plate. Preferably, the conductive ring plate is an iron plate. The iron plate has good electrical conductivity and also has better rigidity.

[0027] Specifically, an observation opening is provided in the middle of the conductive ring plate 2. The inner edge of the conductive ring plate 2 presses against the outer edge of the composite material 5. A plurality of tie components 6 are installed between the outer edge of the conductive ring plate 2 and the tabletop.

[0028] In this embodiment, the conductive ring plate 2 is rectangular. The shape of the observation opening is adapted to the shape of the conductive ring plate. The observation opening is rectangular. The observation opening is provided at the plane center of the conductive ring plate.

[0029] As a preferred implementation manner, the tie component 6 includes: a guide rod 61 and a fastener 62.

[0030] The guide rod 61 is vertically provided on the tabletop. The conductive ring plate 2 is provided with a through hole. The guide rod 61 slides in the through hole. The fastener 62 is adjustably installed on the guide rod 61. The fastener 62 presses against the top of the conductive ring plate 2.

[0031] In this embodiment, an external thread is formed at the upper end of the guide rod 61. The fastener 62 is provided with a threaded hole. The fastener 62 is screwed onto the upper end of the guide rod 61.

[0032] In some embodiments, the guide rod is provided with a plurality of locking holes. The plurality of locking holes are spaced at intervals along the axial direction of the guide rod. The fastener is provided with a guide hole. The guide hole of the fastener is aligned with a locking hole and a locking pin is inserted therein.

[0033] In this embodiment, a plurality of tie components are arranged at equal intervals along the circumferential direction of the conductive ring plate. By applying a uniform pressure to the conductive ring plate through the plurality of tie components, the conductive ring plate is in close contact with the composite material to be tested.

[0034] The electrode rod 3 is erected above the observation opening. A conducting wire is installed at the lower end of the electrode rod 3. The conducting wire is erected above the composite material 5, and the distance between the lowest end of the conducting wire and the upper surface of the composite material 5 is 10 - 20 mm.

[0035] As a preferred implementation manner, the electrode rod 3 is erected above the observation opening through a portal frame 7.

[0036] In this embodiment, the conductive wire is in a spiral shape. The conductive wire is a copper wire.

[0037] A lightning strike surge generator 4, the output end of the lightning strike surge generator 4 is connected to the electrode rod 3. The grounding end 41 of the lightning strike surge generator 4 is connected to the conductive ring plate 2.

[0038] The lightning strike surge generator 4 outputs a 10 / 350 waveform to simulate a lightning strike and generates a high-energy (high voltage, large current) surge.

[0039] Refer to Figure 2 As shown, the test method of the simulated lightning strike test device for glass fiber reinforced composite materials of the present utility model includes the following steps:

[0040] S1. Place the composite material 5 to be tested on the tabletop of the bearing platform 1 so that the composite material is arranged inside the guide columns of multiple tie assemblies.

[0041] S2. Align the observation port opened in the middle of the conductive ring plate 2 with the composite material on the tabletop of the bearing platform, and pass the guide columns through the through holes on the outer edge of the conductive ring plate 2 so that the inner edge of the conductive ring plate presses against the outer edge of the composite material 5.

[0042] S3. Install the fasteners at the upper ends of the guide columns and press against the top of the conductive ring plate 2, and then apply a uniform pressure to the conductive ring plate through multiple tie assemblies so that the conductive ring plate is in close contact with the composite material to be tested.

[0043] S4. Adjust the linear shape of the conductive wire at the lower end of the electrode rod so that the conductive wire is erected above the composite material, and make the distance between the lowest end of the conductive wire and the upper surface of the composite material 5 be 10 - 20 mm.

[0044] S5. Connect the output end of the lightning strike surge generator 4 to the electrode rod 3, and connect the grounding end 41 of the lightning strike surge generator 4 to the conductive ring plate 2 and perform grounding treatment.

[0045] S6. Turn on the lightning strike surge generator 4, and the output end of the lightning strike surge generator 4 outputs a 10 / 350 waveform to simulate a lightning strike and generates a high-energy surge to test the composite material to be tested.

[0046] After the simulated lightning strike, observe whether the composite material meets the design standards, and then determine whether the composite material is used for the fan blades of a wind turbine.

[0047] The simulated lightning strike test device for glass fiber reinforced composites of the present utility model firmly locks the composite material to be tested through a conductive ring plate and a bearing platform, and uses an electrode rod to connect a lightning strike surge generator to simulate lightning strikes, generating high-energy surges to conduct simulated lightning strike tests on the composite material. The simulated lightning strike test device for glass fiber reinforced composites of the present utility model can conveniently and suitably conduct lightning strike tests on the glass fiber reinforced composites of the fan blades of wind turbines.

[0048] The above description is only the preferred embodiment of the present application and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A simulated lightning strike test device for glass fiber reinforced composite materials, characterized in that Comprising: A bearing platform, the bearing platform having a tabletop for placing a composite material to be tested; A conductive ring plate, an observation opening being formed in the middle of the conductive ring plate, the inner edge of the conductive ring plate being pressed against the outer edge of the composite material, and a plurality of tie components being installed between the outer edge of the conductive ring plate and the tabletop; An electrode rod, being erected above the observation opening, a conducting wire being installed at the lower end of the electrode rod, and the conducting wire being erected above the composite material; A lightning strike surge generator, the output end of the lightning strike surge generator being connected to the electrode rod, and the grounding end of the lightning strike surge generator being connected to the conductive ring plate.

2. The simulated lightning strike test device for fiberglass reinforced composites according to claim 1, wherein, The conductive ring plate is an iron plate.

3. The simulated lightning strike test device for glass fiber reinforced composite materials according to claim 1, characterized in that, The conductive ring plate is rectangular, and the shape of the observation opening is adapted to the shape of the conductive ring plate.

4. The simulated lightning strike test device for glass fiber reinforced composite materials according to claim 1, characterized in that, The tie component includes: A guide rod, being vertically installed on the tabletop, the conductive ring plate being provided with a through hole, and the guide rod being slidably arranged in the through hole; A fastener, being installed on the guide rod with an adjustable position and pressing against the top of the conductive ring plate.

5. The simulated lightning strike test device for glass fiber reinforced composite materials according to claim 4, characterized in that, An external thread is formed at the upper end of the guide rod, a threaded hole is formed in the fastener, and the fastener is screwed onto the upper end of the guide rod.

6. The simulated lightning strike test device for fiberglass reinforced composite materials according to claim 1, characterized in that, The electrode rod is erected above the observation opening through a portal frame.

7. The simulated lightning strike test device for glass fiber reinforced composite materials according to claim 1, characterized in that, The distance between the lowest end of the conducting wire and the upper surface of the composite material is 10 - 20 mm.

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