Noise reduction experiment device for high heat sound field environment

Abstract

The utility model relates to the technical field of aero-engine key part testing, in particular to a noise reduction experiment device for a high heat sound field environment, which comprises an experiment device main body and a sealing assembly, and the experiment device main body further comprises a horn section, a front section, a test section, a rear section and a diffusion section. The multiple sealing gaskets can abut against the front section and the rear section all the time, when a tiny gap or looseness occurs in the experimental device, the elastic columns drive the sealing gaskets to move to make up the generated gap, meanwhile, the honeycomb structure of the lining reduces propagation and reflection of noise, and through cooperation of the first rectangular groove and the second rectangular groove, the noise can be effectively reduced. According to the utility model, through the arrangement of the air inlet and the air outlet, a remarkable throttling effect is generated on penetrating air, so that a powerful sealing barrier is formed, the interference of external noise to the interior of the system is effectively reduced, sound waves in the system are further prevented from leaking to the outside, and double sound insulation and sealing effects are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of testing key components of aviation engines, in particular to a noise reduction experimental device used in a high-thermal sound field environment. Background Art

[0002] Existing noise reduction experimental devices for high-temperature acoustic environments typically consist of multiple components, including a horn section, a front section, a test section, a rear section, and a diffuser. These components are connected by bolts to achieve structural stability and sealing. However, due to the increased thermal expansion and contraction of materials caused by high-temperature environments and the continuous impact of sound waves on the connection interfaces during propagation, small gaps or looseness can easily occur at the bolted joints and the overall device support frame. These changes, under the influence of high-intensity acoustic fields, become the main channels for sound wave leakage, not only destroying the closedness of the experimental system but also interfering with the normal propagation of sound waves within the intended path, thereby adversely affecting the accuracy and reliability of experimental results. Furthermore, sound wave leakage not only reduces the credibility of experimental data but also causes additional noise pollution. The disordered diffusion of leaked sound waves in the external environment not only disrupts the quiet environment surrounding the laboratory but also poses a potential threat to the normal operation and health and safety of surrounding equipment or personnel. Utility Model Content

[0003] The purpose of the utility model is to solve the problem that the existing technology is easily affected by the high temperature environment and the impact of sound waves during propagation, resulting in tiny gaps or looseness in the bolt connections, which affects the accuracy and reliability of the experimental results. A noise reduction experimental device for high temperature sound field environment is proposed.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A noise reduction experimental device for a high-thermal acoustic field environment is designed, comprising an experimental device body and a sealing assembly. The experimental device body also comprises a horn section, a front section, a test section, a rear section, and a diffuser section. The horn section, the front section, the test section, the rear section, and the diffuser section are sequentially connected by threaded engagement of bolts and nuts. A rectangular groove is provided on one side of the horn section and the test section adjacent to the front section.

[0006] The test section and the diffusion section are respectively provided with a first rectangular groove on one side adjacent to the rear section, and the front section and the rear section are respectively provided with a second rectangular groove on both sides;

[0007] The ends of the front section and the rear section adjacent to the second rectangular groove are respectively provided with sealing components.

[0008] Preferably, the rectangular groove 1 includes a connecting groove 1, a connecting groove 2, a protrusion 1, a protrusion 2 and a protrusion 3;

[0009] The connecting groove 1 and the connecting groove 2 on both sides are respectively arranged at the two ends of the test section, and the connecting groove 1 is located outside the connecting groove 2;

[0010] A first protrusion is formed between the first connecting groove and the test section, a second protrusion is formed between the first connecting groove and the second connecting groove, and a third protrusion is formed between the second connecting groove and the test section.

[0011] Preferably, the rectangular groove one on one side of the horn section adjacent to the front section and the rectangular groove one on one side of the diffusion section adjacent to the rear section have the same structure as the rectangular grooves one on both sides of the test section.

[0012] Preferably, the rectangular slot 2 includes a first plug-in slot, a second plug-in slot, a third plug-in slot, a first plug-in block, and a second plug-in block;

[0013] The plurality of said plug slots 1, 2 and 3 are respectively arranged at both ends of the front section and the rear section, and the said plug slot 2 is arranged between the plug slot 1 and the plug slot 3, the said plug slot 1 is located on the outside of the plug slot 2, and the said plug slot 3 is located on the inside of the plug slot 2;

[0014] An inserting block 1 is provided between the inserting slot 1 and the inserting slot 2, and an inserting block 2 is provided between the inserting slot 2 and the inserting slot 3.

[0015] Preferably, the first plug-in slot can match with the first protrusion, the second plug-in slot can match with the second protrusion, and the third plug-in slot can match with the third protrusion;

[0016] The first inserting block can match the first connecting slot, and the second inserting block can match the second connecting slot.

[0017] Preferably, the rectangular grooves 1 on both sides of the test section match the rectangular grooves 2 on one side of the front section and the rear section respectively, the rectangular groove 1 of the horn section matches the rectangular groove 2 on the other side of the front section, and the rectangular groove 1 of the diffusion section matches the rectangular groove 2 on the other side of the rear section.

[0018] Preferably, the sealing assembly includes an elastic column, a guide rod, a rectangular seat and a sealing gasket;

[0019] One end of the elastic column is fixedly connected to the guide rod, and one end of the plurality of guide rods away from the elastic column is fixedly connected to the rectangular seat, and a sealing gasket is fixedly provided on one end of the rectangular seat away from the guide column;

[0020] The ends of the plurality of sealing pads away from the rectangular seat are respectively pressed against the inner ends of the rear section and the front section.

[0021] Preferably, the other ends of the multiple groups of elastic columns are fixedly connected to the horn section, the diffuser section and the test section respectively, and the outer wall horn section, the diffuser section and the test section of the multiple groups of guide rods are slidably connected.

[0022] Preferably, the rear section and the diffusion section are respectively provided with inner liners, and the inner liners are of a sandwich structure, and the sandwich of the inner liners is of a honeycomb structure, so as to reduce the propagation and occurrence of noise.

[0023] The utility model proposes a noise reduction experimental device for a high-temperature sound field environment, which has the beneficial effect that: when the speaker section, the front section, the test section, the rear section and the diffusion section are connected, the multiple sealing gaskets drive the multiple guide rods through the rectangular seat to deform the elastic column, and the multiple sealing gaskets can always be tightly pressed against the front section and the rear section. A small gap or looseness occurs in the experimental device, so that the elastic column drives the sealing gasket to move to fill the gap. At the same time, the honeycomb structure of the lining reduces the propagation and reflection of noise. Through the cooperation of rectangular groove one and rectangular groove two, a significant throttling effect is produced on the penetrating gas, thereby forming a strong sealing barrier, effectively reducing the interference of external noise on the internal part of the system, and further hindering the leakage of sound waves inside the system to the outside world, achieving double sound insulation and sealing effects, and avoiding the experimental device from being affected by the high-temperature environment and the continuous impact of sound waves on the connection position during propagation. Small gaps or looseness appear at the bolt connections of the experimental device, resulting in the destruction of the sealing of the experimental system and the interference of the sound wave propagation route, affecting the accuracy and reliability of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure decomposition of the utility model;

[0026] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model;

[0027] Figure 4 for Figure 3 Schematic diagram of the structure of A;

[0028] Figure 5 It is a side structural schematic diagram of the present utility model.

[0029] In the figure: 1. horn section; 2. front section; 3. test section; 4. rear section; 5. diffusion section; 6. rectangular groove one; 601. connecting groove one; 602. connecting groove two; 603. protrusion one; 604. protrusion two; 605. protrusion three; 7. rectangular groove two; 701. plug-in groove one; 702. plug-in groove two; 703. plug-in groove three; 704. plug-in block one; 705. plug-in block two; 8. sealing assembly; 801. elastic column; 802. guide rod; 803. rectangular seat; 804. sealing gasket; 9. lining. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] This embodiment proposes a noise reduction experimental device for a high-temperature acoustic field environment, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the experimental device includes a main body and a sealing assembly 8. The main body of the experimental device also includes a horn section 1, a front section 2, a test section 3, a rear section 4 and a diffuser section 5. The horn section 1, the front section 2, the test section 3, the rear section 4 and the diffuser section 5 are connected in sequence by threaded cooperation of bolts and nuts. A rectangular groove 1 6 is respectively provided on one side of the horn section 1 and the test section 3 adjacent to the front section 2, a rectangular groove 1 6 is respectively provided on one side of the test section 3 and the diffuser section 5 adjacent to the rear section 4, a rectangular groove 2 7 is respectively provided on both sides of the front section 2 and the rear section 4, and a sealing assembly 8 is respectively provided on the ends of the front section 2 and the rear section 4 adjacent to the rectangular groove 2 7.

[0032] Rectangular slot 1 6 includes connecting slot 1 601, connecting slot 2 602, protrusion 1 603, protrusion 2 604 and protrusion 3 605. Connecting slot 1 601 and connecting slot 2 602 on both sides are respectively arranged at the two ends of the test section 3, and connecting slot 1 601 is located on the outside of connecting slot 2 602. Protrusion 1 603 is formed between connecting slot 1 601 and the test section 3, protrusion 2 604 is formed between connecting slot 1 601 and connecting slot 2 602, and protrusion 3 605 is formed between connecting slot 2 602 and the test section 3. The rectangular slot 1 6 on one side of the horn section 1 adjacent to the front section 2 and the rectangular slot 1 6 on one side of the diffuser section 5 adjacent to the rear section 4 have the same structure as the rectangular slots 1 6 on both sides of the test section 3.

[0033] The rectangular slot 2 7 includes a plug-in slot 1 701, a plug-in slot 2 702, a plug-in slot 3 703, an insert block 1 704 and an insert block 2 705. The plurality of plug-in slots 1 701, the plug-in slot 2 702 and the plug-in slot 3 703 are respectively arranged at both ends of the front section 2 and the rear section 4, and the plug-in slot 2 702 is arranged between the plug-in slot 1 and the plug-in slot 3 703. The plug-in slot 1 701 is located on the outside of the plug-in slot 2, and the plug-in slot 3 703 is located on the inside of the plug-in slot 2. An insert block 1 704 is arranged between the plug-in slot 1 701 and the plug-in slot 2 702, and an insert block 2 is arranged between the plug-in slot 2 702 and the plug-in slot 3 703. 705, plugging slot 1 701 can match with protrusion 1 603, plugging slot 2 702 can match with protrusion 2 604, plugging slot 3 703 can match with protrusion 3 605, plug block 1 704 can match with connecting slot 1 601, plug block 2 705 can match with connecting slot 2 602, rectangular slots 1 6 on both sides of test section 3 match with rectangular slots 2 7 on one side of front section 2 and rear section 4 respectively, rectangular slot 1 6 of horn section 1 matches with rectangular slot 2 7 on the other side of front section 2, and rectangular slot 1 6 of diffuser section 5 matches with rectangular slot 2 7 on the other side of rear section 4;

[0034] By matching rectangular slot 1 (6) in test section 3 with rectangular slot 2 (7) in the rear section, insert block 1 (704) is positioned between slot 1 (701) and slot 2 (702), and insert block 2 (705) is positioned between slot 2 (702) and slot 3 (703). Slot 1 (701) mates with protrusion 1 (603), slot 2 (702) mates with protrusion 2 (604), slot 3 (703) mates with protrusion 3 (605), insert block 1 (704) mates with slot 1 (601), and insert block 2 (705) mates with slot 2 (602). The precisely arranged gaps between rectangular slots 1 (6) and 2 (7) create a significant throttling effect on penetrating gas, forming a strong sealing barrier. This effectively reduces external noise interference with the system and further prevents the leakage of internal sound waves to the outside world, achieving a dual sound insulation and sealing effect.

[0035] The sealing assembly 8 includes an elastic column 801, a guide rod 802, a rectangular seat 803 and a sealing gasket 804. One end of the elastic column 801 is fixedly connected to the guide rod 802. The ends of the multiple guide rods 802 away from the elastic column 801 are fixedly connected to the rectangular seat 803. The end of the rectangular seat 803 away from the guide column is fixedly provided with a sealing gasket 804. The ends of the multiple sealing gaskets 804 away from the rectangular seat 803 are respectively tightly abutted against the inner ends of the rear section 4 and the front section 2. The other ends of the multiple groups of elastic columns 801 are respectively fixedly connected to the horn section 1, the diffuser section 5 and the test section 3. The outer walls of the multiple groups of guide rods 802 are slidably connected to the horn section 1, the diffuser section 5 and the test section 3.

[0036] When the speaker section 1, the front section 2, the test section 3, the rear section 4 and the diffusion section 5 are connected, such as when the speaker section 1 is connected to the front section 2, the sealing gasket 804 is blocked by the front section 2 so that the reaction force between the sealing gasket 804 and the front section 2 drives the rectangular seat 803 to move, and the rectangular seat 803 drives multiple guide rods 802 to move. The guide rods 802 move along the speaker section 1, so that the guide rods 802 drive the elastic column 801 to deform, so that the elastic force of the elastic column 801 drives the sealing gasket 804 to press against the front section 2 through the guide rods 802. When the speaker section 1 and the front section 2 are affected by the thermal expansion and contraction of the materials caused by the high temperature environment, and the sound waves are transmitted to the connection during the propagation process, the sealing gasket 804 is connected to the front section 2. The continuous impact on the interface can easily lead to tiny gaps or looseness in the bolted joints and the overall device support frame, so that the elastic column 801 drives the sealing gasket 804 to move to fill the gap, so that the sealing gasket 804 is always in a tight state with the front section 2, thereby improving the sealing between the front section 2 and the speaker section 1 and ensuring the sound insulation of the experimental device. Similarly, multiple sets of sealing components 8 improve the sealing of the connection between the speaker section 1, the front section 2, the test section 3, the rear section 4 and the diffusion section 5. At the same time, the rubber sound insulation material has sound insulation performance, can effectively isolate noise, and promote the formation of a relatively sealed space inside the system, and prevent the leakage of sound waves inside the system.

[0037] The rear section 4 and diffuser section 5 are each equipped with an inner liner 9. Liners 9 are sandwich structures, each with a honeycomb structure to reduce noise transmission and generation. Liners 9 are 15mm thick and utilize the physical properties of the honeycomb geometry to effectively disperse and absorb sound wave energy, reducing noise transmission and reflection.

[0038] Specifically, when the speaker section 1, the front section 2, the test section 3, the rear section 4 and the diffusion section 5 are connected, the plurality of sealing gaskets 804 are driven by the reaction force of the front section 2 and the rear section 4 to move the plurality of guide rods 802 through the rectangular seat 803, so that the elastic column 801 is deformed, so that the plurality of sealing gaskets 804 can always be pressed against the front section 2 and the rear section 4. When a small gap or looseness occurs in the experimental device, the elastic column 801 drives the sealing gasket 804 to move to fill the gap, thereby improving the sealing of the experimental device and ensuring the sound insulation of the experimental device. At the same time, the honeycomb structure of the lining 9 reduces the propagation and reflection of noise, and through the rectangular groove 7 and the rectangular groove 801 The cooperation of the shaped groove 8 produces a significant throttling effect on the penetrating gas, thereby forming a strong sealing barrier, effectively reducing the interference of external noise on the internal system, and further hindering the leakage of sound waves inside the system to the outside world, achieving double sound insulation and sealing effects, avoiding the experimental device from being affected by the thermal expansion and contraction of materials caused by the high-temperature environment, and the continuous impact of sound waves on the connection positions during propagation, which can easily lead to tiny gaps or looseness in the bolted connections, causing the closedness of the experimental system to be destroyed and the normal propagation of sound waves within the predetermined path to be disturbed, thereby affecting the accuracy and reliability of the experimental results.

[0039] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A noise reduction experimental device for a high-thermal acoustic field environment, characterized by: The experimental device comprises an experimental device body and a sealing assembly, wherein the experimental device body further comprises a horn section, a front section, a test section, a rear section, and a diffuser section, wherein the horn section, the front section, the test section, the rear section, and the diffuser section are sequentially connected by threaded engagement of bolts and nuts, and a rectangular groove 1 is respectively provided on one side of the horn section and the test section adjacent to the front section; The test section and the diffusion section are respectively provided with a first rectangular groove on one side adjacent to the rear section, and the front section and the rear section are respectively provided with a second rectangular groove on both sides; The ends of the front section and the rear section adjacent to the second rectangular groove are respectively provided with sealing components.

2. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 1, characterized in that: The rectangular groove 1 includes a connecting groove 1, a connecting groove 2, a protrusion 1, a protrusion 2 and a protrusion 3; The connecting groove 1 and the connecting groove 2 on both sides are respectively arranged at the two ends of the test section, and the connecting groove 1 is located outside the connecting groove 2; A first protrusion is formed between the first connecting groove and the test section, a second protrusion is formed between the first connecting groove and the second connecting groove, and a third protrusion is formed between the second connecting groove and the test section.

3. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 1, characterized in that: The rectangular groove one on one side of the horn section adjacent to the front section and the rectangular groove one on one side of the diffusion section adjacent to the rear section have the same structure as the rectangular grooves one on both sides of the test section.

4. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 1, characterized in that: The rectangular slot 2 includes a first plug-in slot, a second plug-in slot, a third plug-in slot, a first plug-in block, and a second plug-in block; The plurality of said plug slots 1, 2 and 3 are respectively arranged at both ends of the front section and the rear section, and the said plug slot 2 is arranged between the plug slot 1 and the plug slot 3, the said plug slot 1 is located on the outside of the plug slot 2, and the said plug slot 3 is located on the inside of the plug slot 2; An inserting block 1 is provided between the inserting slot 1 and the inserting slot 2, and an inserting block 2 is provided between the inserting slot 2 and the inserting slot 3.

5. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 4, characterized in that: The first plug-in slot can match with the first protrusion, the second plug-in slot can match with the second protrusion, and the third plug-in slot can match with the third protrusion; The first inserting block can match the first connecting slot, and the second inserting block can match the second connecting slot.

6. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 1, characterized in that: The rectangular grooves 1 on both sides of the test section match the rectangular grooves 2 on one side of the front section and the rear section respectively, the rectangular groove 1 of the horn section matches the rectangular groove 2 on the other side of the front section, and the rectangular groove 1 of the diffusion section matches the rectangular groove 2 on the other side of the rear section.

7. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 1, characterized in that: The sealing assembly includes an elastic column, a guide rod, a rectangular seat and a sealing gasket; One end of the elastic column is fixedly connected to the guide rod, and one end of the plurality of guide rods away from the elastic column is fixedly connected to the rectangular seat, and a sealing gasket is fixedly provided on the end of the rectangular seat away from the guide column; The ends of the plurality of sealing pads away from the rectangular seat are respectively pressed against the inner ends of the rear section and the front section.

8. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 7, characterized in that: The other ends of the multiple groups of elastic columns are fixedly connected to the horn section, the diffuser section and the test section respectively, and the outer wall horn section, the diffuser section and the test section of the multiple groups of guide rods are slidably connected.

9. The noise reduction experimental device for a high-thermal acoustic field environment according to claim 1, characterized in that: The rear section and the diffusion section are respectively provided with inner liners, and the inner liners are of sandwich structure, and the sandwich of the inner liners is of honeycomb structure, which is used to reduce the propagation and occurrence of noise.

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