A testing device for pultruded composite fan housings

Abstract

This invention relates to the field of wind turbine testing equipment technology, and more particularly to a testing device for pultruded composite material wind turbine casings, comprising: a testing platform, a drive mechanism, an outer impact mechanism, and an inner impact mechanism; the drive mechanism comprises a drive motor, a drive roller, a drive rope, and a connector; the outer impact mechanism can drive the impact head to impact the outer surface of the wind turbine casing; this invention uses an impact hammer to drive a sliding rod and an impact head to move, and the impact head impacts the outer surface of the pultruded composite material wind turbine casing, completing the impact testing of the outer surface of the pultruded composite material wind turbine casing. Then, an installation block is inserted into the pultruded composite material wind turbine casing, at which point the drive mechanism compresses and then releases the first impact spring, using the elastic force of the first impact spring to complete the impact testing of the inner surface of the pultruded composite material wind turbine casing. Therefore, this invention can complete the impact testing of both the outer and inner surfaces of the pultruded composite material wind turbine casing.

Description

Technical Field

[0001] This invention relates to the field of wind turbine testing equipment technology, and in particular to a testing equipment for pultruded composite material wind turbine casings. Background Technology

[0002] The fan casing is a key protective component of the fan equipment, providing physical protection for the internal parts of the fan. According to its structure, the fan casing can be divided into centrifugal fan casing, axial fan casing, and mixed-flow fan casing. The composite pultruded profile fan casing is usually made of glass fiber reinforced material and unsaturated polyester resin. The composite pultruded profile fan casing has excellent performance, is lightweight, helps to reduce the overall weight of the fan, reduces the difficulty of installation and transportation, and has considerable strength, which can withstand harsh environments and mechanical stress.

[0003] In the existing technology, drop hammer impact testing machines and pendulum impact testing machines are often used to conduct impact tests on the fan casing to test the impact resistance of the fan casing.

[0004] Because the fibers of composite pultruded profiles are arranged in a specific direction during the production process to enhance the mechanical properties in that direction, the fiber orientation of the outer and inner surfaces of the fan casing may differ slightly due to the molding process. For example, during winding or layup, the fibers closer to the outer surface may tend to be distributed circumferentially to resist external pressure, while the inner fibers may be more advantageous in axial reinforcement. Therefore, the impact test results of the outer and inner surfaces of the composite pultruded profile fan casing are different. Furthermore, the drop hammer impact tester and pendulum impact tester can only perform impact tests on the outer surface of the composite pultruded profile fan casing, which creates limitations.

[0005] Therefore, we propose a testing device for pultruded composite material fan housings. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides a testing device for pultruded composite material fan housings, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a testing device for pultruded composite material fan housings, comprising:

[0008] Testing table, fixture, impact head, drive mechanism, external impact mechanism and internal impact mechanism;

[0009] The drive mechanism includes a drive motor, a drive roller, a drive rope, and a connector;

[0010] The inner impact mechanism is mounted on the testing platform; the outer impact mechanism is mounted on the inner impact mechanism; the outer impact mechanism can drive the impact head to impact the outer surface of the fan housing; the inner impact mechanism can drive the impact head to impact the inner surface of the fan housing.

[0011] Preferably, the internal impact mechanism includes a mounting block, a sliding rod, and a first impact spring; the mounting block has a mounting groove and a sliding groove; the sliding groove passes through the mounting block; the sliding rod is slidably connected in the sliding groove, and the sliding rod has an interface that threadedly engages with the connector; the mounting groove is annular in shape and located outside the sliding groove; the first impact spring is fixedly connected in the mounting groove, and a first connecting ring is fixedly connected to the first impact spring; a connecting rod is fixedly connected to the sliding rod; a telescopic rod is slidably connected to the connecting rod; an opening is formed in the first connecting ring; a connecting electric push rod is fixedly connected inside the connecting rod; the connecting electric push rod can push the telescopic rod into the opening.

[0012] Preferably, the external impact mechanism includes a mounting frame and an impact hammer; the upper end of the mounting frame is fixed to the testing platform, and the lower end of the mounting frame is fixed to the mounting block by bolts; the impact hammer is slidably connected to the mounting frame, and the impact hammer has a locking groove and an interface that is threaded to the connector; the sliding rod can be inserted into the locking groove and fixed by bolts.

[0013] The impact hammer drives the sliding rod and impact head to move, and the impact head impacts the outer surface of the composite pultruded profile fan housing to complete the impact detection of the outer surface of the composite pultruded profile fan housing. Then, the mounting block is inserted into the composite pultruded profile fan housing. At this time, the drive mechanism compresses the No. 1 impact spring and then releases it. The elastic force of the No. 1 impact spring is used to complete the impact on the inner surface of the composite pultruded profile fan housing. Therefore, the present invention can complete the impact detection of the outer and inner surfaces of the composite pultruded profile fan housing.

[0014] Preferably, a second impact spring and a third impact spring are fixedly connected in the mounting groove; a second connecting ring and a third connecting ring are respectively fixedly connected to the second impact spring and the third impact spring; the second connecting ring and the third connecting ring are also provided with openings.

[0015] By setting a second impact spring, a third impact spring, a second connecting ring, and a third connecting ring, the number of springs in the mounting groove is increased, thereby increasing the impact force of the sliding rod and preventing the impact force of a single spring from being insufficient to meet the impact detection requirements, thus improving the practicality of the invention.

[0016] Preferably, the mounting block is fitted with a mounting ring, and arc-shaped blocks are fixedly connected to both sides of the mounting block; the arc-shaped blocks are slidably engaged with the mounting ring; and bolts are provided on the mounting ring to press and fix the arc-shaped blocks.

[0017] Preferably, a support groove is provided on the outer side of the mounting ring; a support rod is rotatably connected in the support groove; a contact block is rotatably connected on the support rod; and a support electric push rod is hinged between the support rod and the mounting ring.

[0018] Preferably, the impact head is threaded onto the connecting rod.

[0019] Preferably, the support groove, the support rod, and the contact block are symmetrically arranged on the mounting ring.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention uses an impact hammer to drive a sliding rod and an impact head to move. The impact head impacts the outer surface of the pultruded composite material fan housing, completing the impact detection of the outer surface of the pultruded composite material fan housing. Then, the mounting block is inserted into the pultruded composite material fan housing. At this time, the drive mechanism compresses and then releases the first impact spring. The elastic force of the first impact spring is used to complete the impact on the inner surface of the pultruded composite material fan housing. Therefore, this invention can complete the impact detection of both the outer and inner surfaces of the pultruded composite material fan housing.

[0022] 2. By setting a second impact spring, a third impact spring, a second connecting ring, and a third connecting ring, the present invention increases the number of springs in the mounting groove, thereby increasing the impact force of the sliding rod and preventing the impact force of a single spring from being insufficient to meet the impact detection requirements, thus improving the practicality of the present invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the mounting ring, mounting block, mounting frame, and impact hammer in this invention;

[0027] Figure 5 This is a cross-sectional view of the mounting block and connecting rod in this invention.

[0028] In the diagram: 1. Testing table; 11. Fixing clamp; 12. Impact head; 13. Drive mechanism; 21. Mounting block; 22. Sliding rod; 23. Impact spring No. 1; 24. Mounting groove; 25. Sliding groove; 26. Interface; 27. Connecting ring No. 1; 28. Connecting rod; 29. ​​Telescopic rod; 3. Opening; 31. Connecting electric push rod; 41. Mounting bracket; 42. Impact hammer; 43. Engaging groove; 5. Impact spring No. 2; 51. Impact spring No. 3; 52. Connecting ring No. 2; 53. Connecting ring No. 3; 6. Mounting ring; 61. Arc-shaped block; 62. Support groove; 63. Support rod; 64. Contact block; 65. Supporting electric push rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Refer to the appendix of the instruction manual. Figure 1 , 2 3, 4, and 5, a testing device for pultruded composite material fan housings, comprising:

[0031] Testing table 1, fixing fixture 11, impact head 12, drive mechanism 13, external impact mechanism and internal impact mechanism;

[0032] The drive mechanism 13 includes a drive motor, a drive roller, a drive rope, and a connector;

[0033] The inner impact mechanism is installed on the testing platform 1; the outer impact mechanism is installed on the inner impact mechanism; the outer impact mechanism can drive the impact head 12 to impact the outer surface of the fan housing; the inner impact mechanism can drive the impact head 12 to impact the inner surface of the fan housing.

[0034] In this invention, the internal impact mechanism includes a mounting block 21, a sliding rod 22, and a first impact spring 23. The mounting block 21 has a mounting groove 24 and a sliding groove 25. The sliding groove 25 passes through the mounting block 21. The sliding rod 22 is slidably connected within the sliding groove 25, and has an interface 26 that engages with a threaded connector. The mounting groove 24 is annular in shape and located outside the sliding groove 25. The first impact spring 23 is fixedly connected within the mounting groove 24, and a first connecting ring 27 is fixedly connected to it. A connecting rod 28 is fixedly connected to the sliding rod 22. A telescopic rod 29 is slidably connected to the connecting rod 28. An opening 3 is provided on the first connecting ring 27. A connecting electric push rod 31 is fixedly connected within the connecting rod 28. The connecting electric push rod 31 can push the telescopic rod 29 into the opening 3.

[0035] In this invention, the external impact mechanism includes a mounting frame 41 and an impact hammer 42; the upper end of the mounting frame 41 is fixed on the testing table 1, and the lower end of the mounting frame 41 is fixed to the mounting block 21 by bolts; the impact hammer 42 is slidably connected to the mounting frame 41, and the impact hammer 42 is provided with a locking groove 43, and the impact hammer 42 is also provided with an interface 26 that is threadedly engaged with the connector head; the sliding rod 22 can be inserted into the locking groove 43 and is fixed by bolts.

[0036] In the initial state of this invention, the outer impact structure is connected to the inner impact structure, the impact hammer 42 and the sliding rod 22 are connected together, and the telescopic rod 29 is located inside the connecting rod 28. The composite pultruded profile fan cover is placed on the testing table 1, and the fixing clamp 11 on the testing table 1 holds the composite pultruded profile fan cover. Then, the stress sheet used for information acquisition is attached to the inner and outer surfaces of the composite pultruded profile fan cover. Then, the drive mechanism 13 is started, so that the drive mechanism 13 pulls the impact hammer 42 upward through the connecting head, so that the gravitational potential energy of the impact hammer 42 is increased. The drive motor then reverses, and the drive mechanism 13 no longer lifts the impact hammer 42. Under the action of its own gravity, the impact hammer 42 moves downward with the sliding rod 22 and the impact head 12, impacting the outer surface of the composite pultruded profile fan cover. The stress sheet detects the impact and deformation of the composite pultruded profile fan cover.

[0037] After the outer surface of the composite pultruded profile fan housing is inspected, the bolts between the impact hammer 42 and the sliding rod 22 are unscrewed to separate them. At the same time, the bolts between the mounting bracket 41 and the mounting block 21 are unscrewed, and the connector on the impact hammer 42 is unscrewed. The connector is then screwed onto the sliding rod 22. The mounting block 21 is then inserted into the composite pultruded profile fan housing. The electric push rod 31 is connected to push the telescopic rod 29 so that the telescopic rod 29 is inserted into the opening 3 on the first connecting ring 27. The drive mechanism 13 then pulls the sliding rod 22, compressing the first impact spring 23 through the first connecting ring 27. The drive mechanism 13 then reverses, causing the first impact spring 23 to move the connecting rod 28, the telescopic rod 29, and the sliding rod 22 together. The impact head 12 impacts the inner surface of the composite pultruded profile fan housing, and the stress plate is inspected again.

[0038] This invention uses an impact hammer 42 to drive a sliding rod 22 and an impact head 12 to move. The impact head 12 impacts the outer surface of the pultruded composite material fan housing, thus completing the impact detection of the outer surface of the pultruded composite material fan housing. Then, the mounting block 21 is inserted into the pultruded composite material fan housing. At this time, the drive mechanism 13 compresses the first impact spring 23 and then releases it. The elastic force of the first impact spring 23 is used to complete the impact on the inner surface of the pultruded composite material fan housing. Therefore, this invention can complete the impact detection of both the outer and inner surfaces of the pultruded composite material fan housing.

[0039] Example 2: Based on Example 1, refer to the appendix of the instruction manual. Figures 1 to 5 In this invention, a second impact spring 5 and a third impact spring 51 are fixedly connected in the mounting groove 24; a second connecting ring 52 and a third connecting ring 53 are fixedly connected to the second impact spring 5 and the third impact spring 51 respectively; and openings 3 are also provided on the second connecting ring 52 and the third connecting ring 53.

[0040] In this invention, a second impact spring 5, a third impact spring 51, a second connecting ring 52, and a third connecting ring 53 are further installed in the mounting groove 24. Therefore, the telescopic rod 29 in the connecting rod 28 can extend into the openings 3 on the second connecting ring 52 and the third connecting ring 53, thereby enabling the connecting rod 28 to compress the first impact spring 23, the second impact spring 5, and the third impact spring 51, increasing the impact force of the sliding rod 22 and preventing the force of a single first impact spring 23 from being too small to meet the impact detection requirements.

[0041] The present invention increases the number of springs in the mounting groove 24 by setting a second impact spring 5, a third impact spring 51, a second connecting ring 52, and a third connecting ring 53, thereby increasing the impact force of the sliding rod 22 and preventing the impact force of a single spring from being insufficient to meet the impact detection requirements, thus improving the practicality of the present invention.

[0042] In this invention, the mounting block 21 is fitted with a mounting ring 6, and arc-shaped blocks 61 are fixedly connected to both sides of the mounting block 21; the arc-shaped blocks 61 are slidably engaged with the mounting ring 6; and bolts are provided on the mounting ring 6 to press and fix the arc-shaped blocks 61.

[0043] In this invention, a support groove 62 is provided on the outer side of the mounting ring 6; a support rod 63 is rotatably connected inside the support groove 62; a contact block 64 is rotatably connected on the support rod 63; and a support electric push rod 65 is hinged between the support rod 63 and the mounting ring 6.

[0044] In this invention, the impact head 12 is threaded onto the connecting rod 28.

[0045] In this invention, two sets of support grooves 62, two sets of support rods 63, and two sets of contact blocks 64 are symmetrically arranged on the mounting ring 6.

[0046] In this invention, an mounting ring 6 is provided on the outer side of the mounting block 21, supporting an electric push rod 65 to push a support rod 63, causing the support rod 63 to rotate outward. This allows the contact block 64 on the support rod 63 to contact the inner wall of the composite pultruded profile fan housing, thereby fixing the mounting ring 6 and the mounting block 21 inside the composite pultruded profile fan housing. The mounting ring 6 and the mounting block 21 are connected by an arc-shaped block 61, allowing them to slide. This adjusts the orientation of the mounting block 21 within the composite pultruded profile fan housing, thereby adjusting the impact direction of the sliding rod 22 and the impact head 12, thus impacting the inner wall of the composite pultruded profile fan housing at different angles. The support groove 62 and the support rod 63 are symmetrically arranged, ensuring that the mounting ring 6 and the mounting block 21 can be fixed in all four directions, resulting in greater stability.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A testing device for pultruded composite material fan housings, characterized in that: include: Testing table (1), fixing fixture (11), impact head (12), drive mechanism (13), external impact mechanism and internal impact mechanism; The drive mechanism (13) includes a drive motor, a drive roller, a drive rope, and a connector; The inner impact mechanism is installed on the testing platform (1); the outer impact mechanism is installed on the inner impact mechanism; the outer impact mechanism can drive the impact head (12) to impact the outer surface of the fan housing; the inner impact mechanism can drive the impact head (12) to impact the inner surface of the fan housing; The internal impact mechanism includes a mounting block (21), a sliding rod (22), and a first impact spring (23); the mounting block (21) has a mounting groove (24) and a sliding groove (25); the sliding groove (25) passes through the mounting block (21); the sliding rod (22) is slidably connected in the sliding groove (25), and the sliding rod (22) has an interface (26) that is threaded into the connector; the mounting groove (24) is annular in shape and is located outside the sliding groove (25); The first impact spring (23) is fixedly connected in the mounting groove (24), and the first connecting ring (27) is fixedly connected to the first impact spring (23); the sliding rod (22) is fixedly connected to the connecting rod (28); the connecting rod (28) is slidably connected to the telescopic rod (29); the first connecting ring (27) has an opening (3); the connecting rod (28) is fixedly connected to the connecting electric push rod (31); the connecting electric push rod (31) can push the telescopic rod (29) into the opening (3); The mounting groove (24) is fixedly connected to the No. 2 impact spring (5) and the No. 3 impact spring (51); the No. 2 impact spring (5) and the No. 3 impact spring (51) are respectively fixedly connected to the No. 2 connecting ring (52) and the No. 3 connecting ring (53); the No. 2 connecting ring (52) and the No. 3 connecting ring (53) are also provided with openings (3).

2. The composite material pultruded profile fan housing testing equipment according to claim 1, characterized in that: The external impact mechanism includes a mounting frame (41) and an impact hammer (42); the upper end of the mounting frame (41) is fixed on the testing table (1), and the lower end of the mounting frame (41) is fixed to the mounting block (21) by bolts; the impact hammer (42) is slidably connected to the mounting frame (41), and the impact hammer (42) is provided with a locking groove (43), and the impact hammer (42) is also provided with an interface (26) that is threadedly engaged with the connector head; the sliding rod (22) can be inserted into the locking groove (43) and is fixed by bolts.

3. The composite material pultruded profile fan housing testing equipment according to claim 2, characterized in that: An installation ring (6) is fitted on the outside of the installation block (21), and arc-shaped blocks (61) are fixedly connected to both sides of the installation block (21); the arc-shaped blocks (61) slide with the installation ring (6); bolts are provided on the installation ring (6) to press and fix the arc-shaped blocks (61).

4. The composite material pultruded profile fan housing testing equipment according to claim 3, characterized in that: The mounting ring (6) has a support groove (62) on its outer side; a support rod (63) is rotatably connected in the support groove (62); a contact block (64) is rotatably connected on the support rod (63); and a support electric push rod (65) is hinged between the support rod (63) and the mounting ring (6).

5. The composite material pultruded profile fan housing testing equipment according to claim 4, characterized in that: The impact head (12) is threaded onto the connecting rod (28).

6. The composite material pultruded profile fan housing testing equipment according to claim 5, characterized in that: The two sets of support grooves (62), the two sets of support rods (63), and the two sets of contact blocks (64) are symmetrically arranged on the mounting ring (6).

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