A soundproofing and noise reduction device for ground testing of rocket engines

Abstract

This utility model discloses a sound insulation and noise reduction device for rocket engine ground testing, belonging to the field of aviation testing technology. It includes a sound insulation panel and a soundproof enclosure. The sound insulation panel has multiple slots, and insert plates are inserted into these slots. The sound insulation panel has an internal cavity. This sound insulation and noise reduction device for rocket engine ground testing works by inserting the insert plates into the slots of two sound insulation panels on both sides. During insertion, the insert plates push against locking blocks, causing the blocks to compress springs. The springs then rebound, causing the locking blocks to engage with the slots. The friction between the insert plates and slots, along with the engagement of the locking blocks and slots, secures the insert plates. Bolts are then screwed into fixing holes to fix multiple sound insulation panels to a connecting steel frame. The miniaturized and modular design facilitates partial disassembly and replacement by personnel, improving disassembly and maintenance efficiency compared to traditional welded or integrated structures.

Description

Technical Field

[0001] This utility model belongs to the field of aviation test technology, specifically a sound insulation and noise reduction device for ground testing of rocket engines. Background Technology

[0002] Ground testing of rocket engines is a crucial verification process in aerospace engineering. The purpose of the test is to verify engine performance, assess reliability, and evaluate safety. However, the ground testing of rocket engines generates a large amount of noise, which is characterized by high intensity and wide frequency band, and has a serious impact on test equipment, personnel safety, and the surrounding environment.

[0003] Currently, noise control typically involves using specialized concrete test benches and steel structure soundproof enclosures. The sound-absorbing panels inside these enclosures are usually integrated with the enclosure itself, and they are often quite large and lack modularity. When a part of the enclosure is damaged, the entire enclosure must be discarded, which can lead to waste. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a sound insulation and noise reduction device for ground testing of rocket engines. It solves the problem that the sound-absorbing panels installed inside the steel structure soundproof enclosure are usually integrated with the soundproof enclosure, and most of them are large in size, lack modularity, and have to be discarded as a whole when partially damaged, which easily leads to waste.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sound insulation and noise reduction device for ground testing of rocket engines, comprising a sound insulation board and a sound insulation cover, wherein the sound insulation board has multiple slots, and insert plates are inserted into the sound insulation board through the slots; a cavity is provided inside the sound insulation board; a spring is connected inside the sound insulation board at the slot; a locking block is connected to one end of the spring; and a sound-absorbing board is connected inside the cavity.

[0006] A partition is connected to the opening of the cavity. Two fixed plates are connected inside the cavity. Multiple through holes are opened on the fixed plates. Multiple sound-absorbing blocks are connected between the two fixed plates. Sound-absorbing cotton is connected inside the sound-absorbing blocks. Multiple first through holes are opened on both the sound-absorbing blocks and the sound-absorbing cotton. Multiple second through holes are opened on the partition.

[0007] As a further embodiment of this utility model: the card block slides inside the sound insulation plate, the edge of the card block away from the spring is designed with rounded corners, and the card block penetrates through the slot wall.

[0008] As a further embodiment of this utility model: the sound-absorbing panel is made of polyimide foam, and the sound-absorbing cotton is specifically stainless steel fiber felt.

[0009] As a further embodiment of this utility model: the fixing plate and the multiple sound-absorbing blocks are all disposed between the sound-absorbing plate and the partition, and the sound-absorbing blocks and the opening are arranged alternately.

[0010] As a further embodiment of this utility model: the insert plate is U-shaped, and slots are provided on both sides of the insert plate, and the card block is fitted into the slots.

[0011] As a further embodiment of this utility model: a connecting steel frame is connected inside the soundproof cover, and fixing holes are opened at the four corners of the soundproof panel, and multiple soundproof panels are installed on the connecting steel frame by bolt assembly.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This sound insulation and noise reduction device for rocket engine ground testing uses slots, insert plates, locking blocks, springs, slots, and fixing holes. When installing the combined sound insulation panels, workers insert the insert plates into the slots of the two sound insulation panels on both sides, thus combining the two panels together. During insertion, the insert plates push against the locking blocks, causing the blocks to compress the springs. The springs then rebound, causing the locking blocks to engage with the slots. The friction between the insert plates and slots, along with the engagement of the locking blocks and slots, secures the insert plates. Bolts are then screwed into the fixing holes to fix multiple sound insulation panels to the connecting steel frame. This miniaturized and modular design facilitates partial disassembly and replacement by workers, improving disassembly and maintenance efficiency compared to traditional welded or integrated structures.

[0014] This sound insulation and noise reduction device for ground testing of rocket engines uses sound-absorbing panels, sound-absorbing blocks, sound-absorbing cotton, and first and second through holes. The first and second through holes facilitate the entry of sound waves, allowing the sound waves to be reflected and propagated within the cavity, fixed plate, and multiple sound-absorbing blocks. During propagation, the sound-absorbing panels and sound-absorbing cotton absorb and convert the sound waves, thus achieving composite noise reduction and sound absorption. This improves the noise reduction effect and reduces the impact of noise on testing equipment, personnel safety, and the surrounding environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the sound insulation panel of this utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of section A in the middle;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the sound-absorbing block of this utility model;

[0019] Figure 5 This is a schematic diagram of the assembly plan of the sound insulation panel and soundproof cover of this utility model;

[0020] In the diagram: 1. Sound insulation board; 2. Sound insulation cover; 3. Slot; 4. Insert plate; 5. Cavity; 6. Spring; 7. Locking block; 8. Sound-absorbing board; 9. Partition; 10. Fixing plate; 11. Through-hole; 12. Sound-absorbing block; 13. Sound-absorbing cotton; 14. First through-hole; 15. Second through-hole; 16. Slot; 17. Connecting steel frame; 18. Fixing hole. Detailed Implementation

[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0022] like Figure 1-5 As shown, this utility model provides a technical solution: a sound insulation and noise reduction device for ground testing of rocket engines, including a sound insulation panel 1 and a sound insulation cover 2. A connecting steel frame 17 is connected inside the sound insulation cover 2. Fixing holes 18 are opened at the four corners of the sound insulation panel 1, and multiple sound insulation panels 1 are installed on the connecting steel frame 17 by bolts. The fixing holes 18 at the four corners of the sound insulation panel 1 are connected and fixed to the connecting steel frame 17 inside the sound insulation cover 2 by bolts, which ensures the stability of the overall structure and facilitates partial replacement or maintenance.

[0023] The sound insulation panel 1 has multiple slots 3. The sound insulation panel 1 is connected to the insert plate 4 through the slots 3. The insert plate 4 has a U-shaped design and slots 16 on both sides. The card block 7 fits into the slot 16. By connecting the U-shaped insert plate 4 to the slot 3, multiple sound insulation panels 1 can be quickly connected and locked, and can be positioned to avoid skewing during connection and fixation.

[0024] The soundproof panel 1 has a cavity 5 inside. A spring 6 is connected inside the soundproof panel 1 at the slot 3. One end of the spring 6 is connected to a locking block 7. The locking block 7 slides inside the soundproof panel 1. The edge of the locking block 7 away from the spring 6 is designed with rounded corners. The locking block 7 penetrates the wall of the slot 3. The rounded corner design on one side of the locking block 7 makes it easy for the insert plate 4 to push the locking block 7 to move, thus making it convenient for the staff to insert and remove the insert plate 4.

[0025] The cavity 5 is connected to a sound-absorbing panel 8, which is made of polyimide foam. The sound-absorbing cotton 13 is made of stainless steel fiber felt. The polyimide foam sound-absorbing panel 8 can absorb high-frequency noise, while the stainless steel fiber felt sound-absorbing cotton 13 can process broadband noise, thereby reducing the impact of noise on the surrounding environment. In addition, the stainless steel fiber felt sound-absorbing cotton 13 has a certain degree of resistance to airflow erosion.

[0026] A partition plate 9 is connected to the opening of the cavity 5. Two fixed plates 10 are connected inside the cavity 5. Multiple openings 11 are provided on the fixed plates 10, and multiple sound-absorbing blocks 12 are connected between the two fixed plates 10. The fixed plates 10 and the multiple sound-absorbing blocks 12 are all arranged between the sound-absorbing plate 8 and the partition plate 9. The sound-absorbing blocks 12 and the openings 11 are arranged alternately. Sound-absorbing cotton 13 is connected inside the sound-absorbing blocks 12. Multiple first through holes 14 are provided on the sound-absorbing blocks 12 and the sound-absorbing cotton 13. Multiple second through holes 15 are provided on the partition plate 9. The alternating arrangement of multiple sound-absorbing blocks 12 and multiple through holes 11 can form a resonant cavity, which enhances low-frequency absorption. In conjunction with the fixed plates 10 and the openings 11 in the cavity 5, the sound waves are guided to reflect multiple times to dissipate energy, thereby improving the noise reduction effect.

[0027] The working principle of this utility model is as follows:

[0028] During installation, the staff inserts the insert plate 4 into the slots 3 of the two sound insulation panels 1 on both sides, thus combining the two sound insulation panels 1 together. During the insertion process, the insert plate 4 pushes the locking block 7, causing the locking block 7 to compress the spring 6. The spring 6 then uses its rebound to make the locking block 7 engage with the slot 16, fixing the insert plate 4 in the slot 3. The friction between the insert plate 4 and the slot 3, as well as the engagement between the locking block 7 and the slot 16, fix multiple sound insulation panels 1 together. Then, bolts are screwed into the fixing holes 18 to fix the multiple sound insulation panels 1 to the connecting steel frame 17. The miniaturized and modular design makes it easy for the staff to disassemble and replace parts. During the test, the sound-absorbing panel 8 and the sound-absorbing cotton 13 absorb and convert the sound waves, and the sound waves reflect multiple times between the cavity 5 and the fixing plate 10 to dissipate energy, thus achieving composite noise reduction and sound absorption to improve the noise reduction effect.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A sound insulation and noise reduction device for ground testing of rocket engines, comprising a sound insulation panel (1) and a sound insulation cover (2), characterized in that: The sound insulation board (1) has multiple slots (3), and the sound insulation board (1) is connected to a plug plate (4) through the slots (3). The sound insulation board (1) has a cavity (5) inside. The sound insulation board (1) is connected to a spring (6) inside the slot (3). One end of the spring (6) is connected to a locking block (7). The cavity (5) is connected to a sound-absorbing board (8). A partition plate (9) is connected to the opening of the cavity (5). Two fixed plates (10) are connected inside the cavity (5). Multiple through holes (11) are opened on the fixed plates (10). Multiple sound-absorbing blocks (12) are connected between the two fixed plates (10). Sound-absorbing cotton (13) is connected inside the sound-absorbing blocks (12). Multiple first through holes (14) are opened on both the sound-absorbing blocks (12) and the sound-absorbing cotton (13). Multiple second through holes (15) are opened on the partition plate (9).

2. The sound insulation and noise reduction device for ground testing of rocket engines according to claim 1, characterized in that: The card block (7) slides inside the sound insulation plate (1). The edge of the card block (7) away from the spring (6) is rounded. The card block (7) passes through the slot wall (3).

3. The sound insulation and noise reduction device for ground testing of rocket engines according to claim 1, characterized in that: The sound-absorbing panel (8) is made of polyimide foam, and the sound-absorbing cotton (13) is specifically made of stainless steel fiber felt.

4. The sound insulation and noise reduction device for ground testing of rocket engines according to claim 1, characterized in that: The fixed plate (10) and multiple sound-absorbing blocks (12) are all arranged between the sound-absorbing plate (8) and the partition (9), and the sound-absorbing blocks (12) and the opening (11) are arranged alternately.

5. A sound insulation and noise reduction device for ground testing of rocket engines according to claim 1, characterized in that: The insert plate (4) is U-shaped, and slots (16) are provided on both sides of the insert plate (4). The card block (7) is fitted into the slots (16).

6. The sound insulation and noise reduction device for ground testing of rocket engines according to claim 1, characterized in that: The soundproof cover (2) is connected to a connecting steel frame (17) inside. The soundproof panel (1) has fixing holes (18) at the four corners, and multiple soundproof panels (1) are installed on the connecting steel frame (17) by bolt assembly.

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