Spliced noise reduction guide wall for aircraft ground test

Abstract

The utility model provides a kind of spliced noise reduction fairing for airplane ground test, belong to aviation equipment technical field, the spliced noise reduction fairing for airplane ground test, including base;Fairing body, fairing body is rotationally connected on the outer surface of base by multiple pivots, the inner surface of fairing body is provided with noise reduction board, the inner surface of base is fixedly connected with support seat;Sliding groove, sliding groove is opened in one end of base, splicing operation is simple and fast, can realize multistage positioning system, make module accurate and fast butt joint, greatly improve the splicing efficiency, reduce the required manpower and tool, simultaneously connect firm and reliable, effectively resist the high-strength vibration generated by engine airflow, ensure the long-term stability of module connection, and dustproof sealing performance is excellent, effectively prevent dust, sundries from entering mechanism inside, protect sliding mechanism and connecting component, prolong the service life of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of aviation equipment technology, specifically relating to a spliced ​​noise reduction guide wall for aircraft ground testing. Background Technology

[0002] The high-temperature, high-speed exhaust gases emitted by aircraft engines during high-thrust tests threaten the safety of personnel and vehicles on the ground. In the technical field of aircraft ground test deflector walls, modular structures have become an important development direction for achieving rapid deployment and flexible layout. However, existing modular deflector walls still have significant shortcomings in the connection between modules.

[0003] The connection interfaces between existing modular airflow deflectors are often complex in design. For example, Chinese patent application CN202121936766.2, published on January 8, 2022, discloses a support structure for installing an airflow deflector during aircraft testing. This relates to the field of aviation equipment technology and includes a deflector plate. Support plates are fixedly installed at both ends of one side of the deflector plate. Support rods are fixedly connected to one side of each of the two sets of support plates. Multiple sets of force-bearing plates are evenly arranged from bottom to top between the two sets of support plates. Multiple sets of springs are evenly arranged on one side of each set of force-bearing plates, and a fixing plate is fixedly installed on one side of each spring. The fixing plate is fixedly connected by an arc-shaped support strip. Thus, the middle position of the back of the deflector plate is under the compression of multiple sets of springs, which provides force support to the middle position of the back of the force-bearing plates. This effectively improves the airflow deflection effect during aircraft testing, thus addressing the problem of unbalanced force on the deflector plate caused by simply supporting it with a frame in the existing technology. This significantly improves the overall stability of the deflector plate.

[0004] The splicing process described in the above literature requires multiple people to work together and use specialized tools, which is cumbersome and time-consuming, making it difficult to achieve rapid deployment. Secondly, common bolt connections or simple plug-in methods are prone to loosening due to vibration when subjected to the continuous high-intensity airflow impact of the engine, resulting in insufficient connection reliability and safety hazards. In addition, the splicing structure lacks adequate sealing protection, allowing dust and debris to easily penetrate into the connection mechanism, affecting its long-term stability and lifespan. Utility Model Content

[0005] The purpose of this invention is to provide a modular noise reduction and airflow guide wall for aircraft ground testing, which is easy to assemble, has good sealing performance, and high stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A modular noise reduction guide wall for aircraft ground testing includes: a base, a guide wall body, a sliding groove, a splicing groove, and a support mechanism. The guide wall body is rotatably connected to the outer surface of the base via multiple rotating shafts. A noise reduction plate is provided on the inner surface of the guide wall body, and a support seat is fixedly connected to the inner surface of the base. The sliding groove is formed at one end of the base, and a sliding block is slidably connected to the inner surface of the sliding groove. A splicing block is fixedly connected to the outer surface of the sliding block. The splicing groove is located at the other end of the base, and the inner surface of the splicing groove is slidably connected to the outer surface of the splicing block. Both the base and the outer surface of the splicing block are threaded with second bolts. The support mechanism is set in the sliding groove to support and limit the sliding splicing block.

[0007] Furthermore, the support mechanism includes: Two limiting grooves are respectively opened on the inner walls of the two sides of the sliding groove. A third spring is provided on the inner surface of each of the two limiting grooves. A limiting block is slidably connected to the inner surface of each of the two limiting grooves. The close ends of the two limiting blocks and the two sides of the splicing block are respectively fixedly connected. A control component, which is disposed within the base, is used to control the sliding splicing blocks.

[0008] Furthermore, the control component includes: The control groove is located on one side of the splicing block. An elastic sealing sheet is provided on the inner surface of the control groove. A control block is slidably connected to the inner surface of the control groove. One end of the control block and one end of the sliding block are fixedly connected.

[0009] Furthermore, it also includes a telescopic mechanism, which comprises: A sliding shell is rotatably connected to the outer surface of the base via a rotating shaft. A sliding rod is rotatably connected to the outer surface of the flow guide wall via a rotating shaft. An extrusion plate is fixedly connected to the lower end of the sliding rod. The outer surface of the sliding rod and the inner surface of the sliding shell are slidably connected. An elastic component is disposed within the sliding shell to limit the movement of the sliding extrusion plate.

[0010] Furthermore, the resilient component includes: A support shell is fixedly connected to the inner surface of a sliding shell. A second spring and a first spring are respectively provided on the inner and outer surfaces of the support shell. An extrusion rod is slidably connected to the inner surface of the support shell, and the upper end of the extrusion rod is fixedly connected to the lower end of the extrusion plate.

[0011] Furthermore, one end of the base is provided with a magnetic groove and two insertion grooves, and the other end of the base is provided with a magnetic block and two insertion blocks fixedly connected thereto.

[0012] Furthermore, the upper end of the base is fixedly connected to multiple support blocks, and the upper end of the base is threadedly connected to two first bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. In this solution, by aligning one end of a module with a splicing block with the end of another module with a splicing slot, the control block is pushed to drive the sliding block to slide outward along the sliding slot. At the same time, the sliding block drives the splicing block to extend outward from the sliding slot. Simultaneously, the plug-in block and magnetic block on one module are inserted into the plug-in slot and magnetic slot on the other module for positioning and fixation. Then, the module is pushed further, and the extended splicing block slides completely into the splicing slot of the adjacent module. The second bolt is then passed through the corresponding screw holes on the base and the splicing block and tightened, thereby firmly connecting the two modules into a whole. The splicing operation is simple and quick, and a multi-level positioning system can be realized, making the module docking accurate and fast, greatly improving the splicing efficiency, reducing the required manpower and tools, and ensuring a firm and reliable connection. It effectively resists the high-intensity vibration generated by the engine airflow, ensuring the long-term stability of the connection between modules. Moreover, it has excellent dustproof and sealing performance, effectively preventing dust and debris from entering the mechanism, protecting the sliding mechanism and connecting parts, and extending the service life of the equipment.

[0014] 2. In this solution, when the guide wall is impacted by the airflow from the aircraft engine, it is simultaneously subjected to extrusion force that pushes the sliding rod, causing the lower extrusion plate to slide downwards within the sliding shell. The extrusion plate pushes the extrusion rod downwards within the support shell and compresses the second spring inside. During this process, the first spring may also be compressed or released, both participating in buffering. When the impact force decreases or disappears, the spring recovers its deformation, pushing the extrusion rod and sliding rod back to their original positions, thereby supporting and limiting the guide wall. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the present utility model; Figure 2 This is a first perspective sectional view of the present invention; Figure 3 This is a second perspective sectional view of the present invention; Figure 4 This is a third perspective sectional view of the present invention; Figure 5This is the fourth perspective sectional view of the present invention; Figure 6 This utility model Figure 4 A magnified view of section A in the image.

[0016] In the diagram: 1. Base; 2. Guide wall; 3. Noise reduction plate; 4. Sliding shell; 5. Sliding rod; 6. Support seat; 7. First bolt; 8. Support block; 9. Support shell; 10. First spring; 11. Second spring; 12. Extrusion rod; 13. Extrusion plate; 14. Sliding groove; 15. Sliding block; 16. Splicing block; 17. Splicing groove; 18. Second bolt; 19. Limiting groove; 20. Limiting block; 21. Third spring; 22. Insertion groove; 23. Insertion block; 24. Magnetic groove; 25. Magnetic block; 26. Control groove; 27. Elastic sealing sheet; 28. Control block; 100-Cover plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1 Please see Figure 1-6 The present invention provides the following technical solution: A modular noise reduction guide wall for aircraft ground testing includes: a base 1, a guide wall 2, a sliding groove 14 and a splicing groove 17. The guide wall 2 is rotatably connected to the outer surface of the base 1 through multiple rotating shafts. A noise reduction plate 3 is provided on the inner surface of the guide wall 2. A support seat 6 is fixedly connected to the inner surface of the base 1. A sliding groove 14 is formed at one end of the base 1. A sliding block 15 is slidably connected to the inner surface of the sliding groove 14, and a splicing block 16 is fixedly connected to the outer surface of the sliding block 15. A splicing groove 17 is formed at the other end of the base 1. The inner surface of the splicing groove 17 is slidably connected to the outer surface of the splicing block 16. Both the base 1 and the outer surface of the splicing block 16 are threaded with second bolts 18. The support mechanism is set in the sliding groove 14 to support and limit the sliding splicing block 16.

[0019] In a specific embodiment of this utility model, the base 1 serves as the basic support structure for the entire device, used to fix and support all other components such as the flow guide wall 2 and the support seat 6, and to securely install them on the ground. The flow guide wall 2 is used to withstand and deflect the high-speed airflow generated by the aircraft engine, changing its direction and diffusion path to achieve the flow guide function. The noise reduction plate 3 is installed on the inner surface of the flow guide wall 2, that is, the side facing the sound source. Its interior usually contains sound-absorbing materials and perforated plate structures to absorb the sound wave energy generated by the engine and achieve the noise reduction function.

[0020] The support base 6 is used to enhance the structural strength and stability of the base 1, and to provide an installation foundation or reinforced support for the internal mechanism. The sliding groove 14 provides sliding space and track for the sliding block 15 and the splicing block 16. It is a key structure for realizing the telescopic splicing between modules. The sliding block 15 connects the splicing block 16 to the base 1 and allows the splicing block 16 to move along the sliding groove 14. The splicing block 16 is fixed on the sliding block 15 and can slide into the splicing groove 17 of the adjacent module. It is the core component for realizing the interconnection between two modules and the transfer of load. At the same time, the splicing groove 17 is used to accommodate and cooperate with the splicing block 16 of the adjacent module, providing an interface and positioning for splicing.

[0021] The second bolt 18 passes through the screw holes on the base 1 and the pre-positioned splicing block 16 and is tightened to securely lock the two modules together after splicing, preventing separation. The two third springs 21 support and limit the sliding of the two limiting blocks 20 and support the splicing block 16 that is fixed in place. The limiting groove 19 provides a sliding track for the limiting block 20 and restricts its movement to only within the groove. At the same time, the limiting block 20 is fixed to both sides of the splicing block 16 to prevent the splicing block 16 from twisting or falling out of the sliding groove 14 during sliding, ensuring its smooth linear movement.

[0022] The control slot 26 provides movement space for the control block 28. The elastic sealing sheet 27 seals the slot when the splicing block 16 retracts, preventing dust and debris from entering the control slot 26 and affecting the movement of the mechanism. At the same time, when the control block 28 is pushed or pulled, the sliding block 15 and the splicing block 16 can be extended or retracted together, realizing a control method that does not require pushing or pulling the splicing block 16 directly from the end face of the module.

[0023] In this embodiment, a notch is provided on the base 1, and a cover plate 100 is provided on the notch. The cover plate 100 covers the notch to form a sliding space for the limiting block 20. A through hole is provided on the cover plate 100 for the control block 28 to pass through. A control groove 26 is provided on the cover plate 100. An elastic sealing sheet 27 is slidably provided on the control groove 26. One end of the elastic sealing sheet 27 is fixedly connected to one end of the control groove 26, and the other end of the elastic sealing sheet 27 is fixedly connected to the control block 28.

[0024] It achieves simple and quick splicing operation, and can realize a multi-level positioning system, which enables accurate and fast module docking, greatly improving splicing efficiency and reducing the required manpower and tools. At the same time, the connection is firm and reliable, effectively resisting the high-intensity vibration generated by engine airflow, ensuring the long-term stability of the connection between modules, and has excellent dustproof sealing performance, effectively preventing dust and debris from entering the mechanism, protecting the sliding mechanism and connecting parts, and extending the service life of the equipment.

[0025] Please refer to the details. Figure 3 It also includes a telescopic mechanism, which includes a sliding shell 4 and an elastic component. The sliding shell 4 is rotatably connected to the outer surface of the base 1 via a rotating shaft. The outer surface of the guide wall 2 is rotatably connected to a sliding rod 5 via a rotating shaft. The lower end of the sliding rod 5 is fixedly connected to an extrusion plate 13. The outer surface of the sliding rod 5 and the inner surface of the sliding shell 4 are slidably connected. The elastic component is disposed inside the sliding shell 4 to limit the sliding compression plate 13.

[0026] In this embodiment: the sliding shell 4 is rotatably connected to the base 1 via a rotating shaft, serving as a guide and housing for the sliding rod 5. Simultaneously, the sliding rod 5 slides within the sliding shell 4, while the extrusion plate 13 moves with the sliding rod 5, used to extrude the elastic component downwards when the flow guide wall 2 is subjected to force. The support shell 9 serves as the mounting base and guide for the first spring 10, the second spring 11, and the extrusion rod 12. The first spring 10 is located outside the support shell 9, used to provide initial support force or auxiliary buffering. The second spring 11 is located inside the support shell 9, used to absorb and buffer the impact force and vibration from the flow guide wall 2, and stores energy through elastic deformation, allowing the flow guide wall 2 to return to its original position after being subjected to force. Thus, the force on the extrusion plate 13 is transmitted to the second spring 11 according to the extrusion rod 12, causing it to compress or extend.

[0027] Please refer to the details. Figure 5 One end of the base 1 is provided with a magnetic groove 24 and two insertion grooves 22, and the other end of the base 1 is provided with a magnetic block 25 and two insertion blocks 23 fixedly connected.

[0028] In this embodiment: the magnetic groove 24 and the magnetic block 25 cooperate to magnetically attract the two modules and maintain a preliminary connection before the bolts are tightened, which facilitates subsequent operations. At the same time, the insertion groove 22 and the insertion block 23 cooperate to play a preliminary guiding and positioning role during splicing, preventing the modules from being misaligned in the vertical and horizontal directions.

[0029] Please refer to the details. Figure 4 The upper end of the base 1 is fixedly connected to multiple support blocks 8, and the upper end of the base 1 is threadedly connected to two first bolts 7.

[0030] In this embodiment: the support block 8 is used to support the installed base 1 and ensure the bottom pressure of the base 1. The first bolt 7 is used to fix the entire base 1 to the ground or pre-embedded foundation to prevent the device from moving under the impact of airflow.

[0031] The working principle and usage process of this utility model are as follows: First, place the base 1 in the preset position and fix it to the ground using the first bolt 7. Then, push the control block 28 on one module, and the sliding block 15 will drive the splicing block 16 to extend from the sliding groove 14. The limiting block 20 slides in the limiting groove 19 to ensure stable movement. Bring the two modules closer together so that the insertion block 23 is inserted into the insertion groove 22 of the other module for initial positioning. At the same time, the magnetic block 25 is attracted to the magnetic groove 24 to achieve pre-fixation. The extended splicing block... Block 16 is fully pushed into the splicing slot 17 of the adjacent module. The second bolt 18 is passed through the base 1 and the splicing block 16 and tightened to complete the rigid connection. When the airflow guide wall 2 is impacted by airflow, its rotation is converted into downward pressure on the extrusion plate 13 and extrusion rod 12 through the sliding rod 5, compressing the second spring 11 to absorb the impact energy. When the airflow weakens, the spring returns to its original position, allowing the airflow guide wall 2 to return to its original position. When disassembly is required, the second bolt 18 is unscrewed, and the splicing block 16 is pulled back by the control block 28 to separate the modules. The elastic sealing plate 27 closes as the splicing block 16 retracts to prevent debris from entering.

Claims

1. A modular noise reduction and airflow guide wall for aircraft ground testing, characterized in that, include: The base (1), the guide wall (2), the sliding groove (14), the splicing groove (17) and the support mechanism; the guide wall (2) is rotatably connected to the outer surface of the base (1) through multiple rotating shafts, the inner surface of the guide wall (2) is provided with a noise reduction plate (3), and the inner surface of the base (1) is fixedly connected with a support seat (6). The sliding groove (14) is opened at one end of the base (1), and a sliding block (15) is slidably connected to the inner surface of the sliding groove (14), and a splicing block (16) is fixedly connected to the outer surface of the sliding block (15). The splicing groove (17) is opened at the other end of the base (1). The inner surface of the splicing groove (17) and the outer surface of the splicing block (16) are slidably connected. The outer surfaces of the base (1) and the splicing block (16) are threaded with second bolts (18). The support mechanism is set in the sliding groove (14) to support and limit the sliding splicing block (16).

2. The modular noise reduction and airflow guide wall for aircraft ground testing as described in claim 1, characterized in that: The supporting structure includes: Two limiting grooves (19) are respectively opened on the inner walls of the two sides of the sliding groove (14). A third spring (21) is provided on the inner surface of each of the two limiting grooves (19). A limiting block (20) is slidably connected to the inner surface of each of the two limiting grooves (19). The close ends of the two limiting blocks (20) and the two sides of the splicing block (16) are respectively fixedly connected. The control component is disposed in the base (1) to control the sliding splicing block (16).

3. The modular noise reduction and airflow guide wall for aircraft ground testing as described in claim 2, characterized in that: The control components include: The control groove (26) is located on one side of the splicing block (16). An elastic sealing sheet (27) is provided on the inner surface of the control groove (26). A control block (28) is slidably connected to the inner surface of the control groove (26). One end of the control block (28) is fixedly connected to one end of the sliding block (15).

4. The modular noise reduction and flow guidance wall for aircraft ground testing as described in claim 3, characterized in that: It also includes a telescopic mechanism, which comprises: The sliding shell (4) is rotatably connected to the outer surface of the base (1) via a rotating shaft. The outer surface of the guide wall (2) is rotatably connected to a sliding rod (5) via a rotating shaft. The lower end of the sliding rod (5) is fixedly connected to an extrusion plate (13). The outer surface of the sliding rod (5) and the inner surface of the sliding shell (4) are slidably connected. An elastic component is disposed within the sliding shell (4) to limit the sliding compression plate (13).

5. The modular noise reduction and airflow guide wall for aircraft ground testing as described in claim 4, characterized in that: The elastic component includes: A support shell (9) is fixedly connected to the inner surface of a sliding shell (4). A second spring (11) and a first spring (10) are respectively provided on the inner and outer surfaces of the support shell (9). A pressing rod (12) is slidably connected to the inner surface of the support shell (9). The upper end of the pressing rod (12) is fixedly connected to the lower end of the pressing plate (13).

6. The modular noise reduction and airflow guide wall for aircraft ground testing according to claim 5, characterized in that: The base (1) has a magnetic suction groove (24) and two plug-in grooves (22) at one end, and a magnetic suction block (25) and two plug-in blocks (23) are fixedly connected at the other end of the base (1).

7. A modular noise reduction and flow guide wall for aircraft ground testing according to claim 6, characterized in that: The upper end of the base (1) is fixedly connected to multiple support blocks (8), and the upper end of the base (1) is threadedly connected to two first bolts (7).

Images