A multi-layer soundproof chamber structure of a sound-absorbing and noise-reducing honeycomb panel

Abstract

The utility model provides a kind of multilayer soundproof chamber structure of sound-absorbing noise honeycomb board belongs to honeycomb board technical field, the multilayer soundproof chamber structure of sound-absorbing noise honeycomb board includes honeycomb board body, chamber partition plate and corrugated gasket, honeycomb board body is hexagonal honeycomb grid structure, chamber partition plate is arranged inside honeycomb board body and the inside space of honeycomb board body is separated into multiple independent soundproof chambers along thickness direction, corrugated gasket is attached and is arranged on the two side surfaces of chamber partition plate between adjacent two soundproof chambers, the thickness of chamber partition plate is ladder type decreasing distribution along honeycomb board body thickness direction, the thickness of chamber partition plate close to honeycomb board body sound receiving surface is greater than the thickness of chamber partition plate away from sound receiving surface, the peak of corrugated gasket and the surface point contact of chamber partition plate;The utility model can solve the problem that the absorption capacity of honeycomb board to different frequency sound waves is greatly different, especially in the problem that the noise reduction of low frequency band is not good.

Description

Technical Field

[0001] This utility model belongs to the field of honeycomb panel technology, specifically, it relates to a multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel. Background Technology

[0002] In modern industrial production and civil construction, noise pollution has become a significant factor affecting work efficiency and quality of life, especially in places like machine shops, transportation hubs, commercial complexes, and residential buildings, where effective sound-absorbing and noise-reducing materials and structures are needed to control noise propagation. Honeycomb panels, due to their lightweight and high-strength characteristics, are widely used in sound insulation and noise reduction. Traditional honeycomb panel sound insulation structures mainly achieve noise reduction by filling the honeycomb cells with sound-absorbing materials or setting simple partitions. Common solutions in existing technologies include setting single or double-layer parallel partitions inside the honeycomb panel, dividing the honeycomb space into several independent chambers, and utilizing the acoustic resonance characteristics of the chambers to absorb sound waves of specific frequencies. However, this type of structure has significant limitations. Because the partitions are of uniform thickness and the chambers are of consistent height, the structure's absorption frequency range for sound waves is narrow, mainly concentrated near the resonant frequency, with a significant decrease in absorption effect for sound waves deviating from the resonant frequency. Another common method is to fill the chambers with porous sound-absorbing materials. While this can broaden the sound absorption band, the filling material increases the structural weight, reduces the load-bearing efficiency of the honeycomb panel, and porous materials are prone to absorbing water and deteriorating in humid environments, affecting long-term performance. Furthermore, existing technologies often use spot welding or adhesive bonding to connect the chamber partitions to the honeycomb panel body, which makes it difficult to guarantee connection strength and sealing performance. Under repeated sound pressure, these connections are prone to loosening or detachment, leading to a decrease in sound insulation performance. To address these technical shortcomings, the industry urgently needs to develop a new type of multi-layered soundproof chamber structure that can achieve both wide-bandgap and efficient sound absorption and noise reduction, while maintaining the advantages of lightweight and high strength of honeycomb panels, and also possessing good environmental adaptability and long-term stability. Utility Model Content

[0003] In view of this, the present invention provides a multi-layer sound insulation chamber structure for sound-absorbing and noise-reducing honeycomb panels, which can solve the problem that the existing honeycomb panels use a single-thickness partition plate and chamber design for sound insulation, resulting in a large difference in the absorption capacity of sound waves of different frequencies, leading to poor noise reduction effect, especially in the mid-low frequency range.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a multi-layer sound insulation chamber structure for a sound-absorbing and noise-reducing honeycomb panel, including a honeycomb panel body, chamber partitions, and corrugated pads. The honeycomb panel body has a hexagonal honeycomb grid structure. The chamber partitions are disposed inside the honeycomb panel body and divide the internal space of the honeycomb panel body into multiple independent sound insulation chambers along the thickness direction. The corrugated pads are attached to the two side surfaces of the chamber partitions between two adjacent sound insulation chambers. The thickness of the chamber partitions decreases in a stepped manner along the thickness direction of the honeycomb panel body. The thickness of the chamber partitions closer to the sound-receiving surface of the honeycomb panel body is greater than that of the chamber partitions farther away from the sound-receiving surface. The crests of the corrugated pads make point contact with the surface of the chamber partitions, and the troughs of the corrugated pads make contact with the inner wall surface of the adjacent sound insulation chambers.

[0006] The technical effects of the multi-layer sound insulation chamber structure of the sound-absorbing and noise-reducing honeycomb panel provided by this utility model are as follows: By designing the thickness of the chamber partition plates to decrease in a stepped manner along the thickness direction, the chamber partition plates closer to the sound-receiving surface can withstand greater sound pressure impact and effectively reflect high-frequency sound waves, while the thinner chamber partition plates farther from the sound-receiving surface can better absorb mid- and low-frequency sound waves, achieving layered processing of sound waves in different frequency bands. The point contact design between the corrugated gasket crest and the chamber partition plate reduces the contact area for sound wave transmission, lowering the propagation efficiency of vibration energy in the solid structure, while the line contact between the trough and the inner wall of the sound insulation chamber forms an additional sound wave reflection interface, increasing the propagation path and energy loss of sound waves within the chamber, thereby significantly improving the overall sound insulation and noise reduction performance.

[0007] Based on the above technical solution, the multi-layer sound insulation chamber structure of the sound-absorbing and noise-reducing honeycomb panel of this utility model can be further improved as follows:

[0008] The chamber partitions are arranged in 3 to 5 layers along the thickness of the honeycomb panel body, and the height of the sound insulation chamber formed between two adjacent chamber partitions increases layer by layer along the direction away from the sound receiving surface.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by setting 3 to 5 layers of chamber partitions and gradually increasing the height of the sound insulation chamber away from the sound receiving surface, a gradually changing acoustic impedance matching structure is formed, which enables sound waves of different frequencies to resonate and absorb in the corresponding height chambers. This avoids the frequency selectivity problem of sound waves in a single-size chamber, broadens the effective frequency range of sound absorption and noise reduction, and significantly improves the absorption effect of mid- and low-frequency noise. At the same time, the multi-layer chamber structure increases the number of barriers to sound wave propagation, further improving the sound insulation performance.

[0010] Furthermore, the corrugation direction of the corrugated liner is set parallel to the edge of the hexagonal grid of the honeycomb panel body, and the height of the corrugated liner crest is smaller than the spacing between the adjacent two-layer chamber partition plates.

[0011] The beneficial effects of the above-mentioned improvement scheme are as follows: the corrugation direction of the corrugated gasket is set parallel to the edge of the hexagonal grid of the honeycomb panel body, so that when the sound waves propagate in the honeycomb panel, they encounter the regular corrugated structure, producing an orderly scattering and interference effect. This disperses the incident sound energy into multiple directions and forms a local resonant cavity at the bottom of the corrugation valley, enhancing the sound energy dissipation effect. The design that the wave crest height is smaller than the spacing between the adjacent chamber partitions ensures that the corrugated gasket does not completely fill the chamber space, retaining a sufficient air layer for multiple reflections and absorption of sound waves, avoiding the degradation of acoustic performance caused by overfilling, while also ensuring the stability and lightweight characteristics of the structure.

[0012] Furthermore, the edge of the chamber partition plate is embeddedly connected to the inner wall of the honeycomb panel body, and the edge of the chamber partition plate is provided with an annular boss, which is embedded in the annular groove opened on the inner wall of the honeycomb panel body.

[0013] The beneficial effects of the above-mentioned improved scheme are as follows: the embedded connection between the annular protrusion on the edge of the chamber partition plate and the annular groove on the inner wall of the honeycomb panel body forms a robust mechanical locking structure, effectively preventing the chamber partition plate from shifting or falling off under sound pressure. Simultaneously, this embedded connection creates a damping interface for sound wave transmission at the contact surface between the protrusion and the groove, reducing the transmission of vibration energy from the chamber partition plate to the honeycomb panel body and lowering structural noise. The embedded connection also eliminates the stress concentration problems that may occur with traditional bonding or welding methods, improving the overall durability and reliability of the structure.

[0014] Furthermore, the corrugated gasket is in the form of a sine wave or a triangular wave, and the ratio of the wavelength of the corrugated gasket to the height of the crest is 3:1 to 5:1.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The corrugated pad uses a sinusoidal or triangular waveform, and the ratio of wavelength to wave crest height is controlled within the range of 3:1 to 5:1, forming a suitable corrugated geometric feature. This ensures that the scattering angle and phase difference of sound waves generated on the corrugated surface are in an optimal state, maximizing the interference cancellation effect of sound waves. This proportional relationship also gives the corrugated pad good elastic recovery characteristics, enabling it to maintain a stable geometric shape under long-term sound pressure changes, avoiding the attenuation of sound absorption performance caused by corrugation flattening or deformation. At the same time, this corrugated shape is easy to process and manufacture, reducing production costs.

[0016] Furthermore, the chamber partition plate has multiple microporous channels along its thickness direction. The microporous channels are circular or elliptical, and the diameter of the microporous channels is less than one-tenth of the thickness of the chamber partition plate.

[0017] The beneficial effects of the above-mentioned improvement scheme are as follows: By creating circular or elliptical microporous channels with a diameter less than one-tenth of the thickness of the chamber partition plate, tiny channels for sound waves to pass through are formed. This causes energy loss due to viscosity and thermal conduction effects as the sound waves pass through the micropores, converting acoustic energy into heat energy for dissipation. The presence of these microporous channels also creates controlled acoustic coupling between adjacent soundproof chambers, avoiding the problem of excessively sharp resonance peaks that may occur in completely sealed chambers, smoothing the sound absorption frequency curve. Simultaneously, the precise control of the micropore size ensures that the chamber partition plate still possesses sufficient structural strength and its load-bearing and sound insulation capabilities are not weakened by the openings.

[0018] Furthermore, the ratio of the side length of the hexagonal grid to the thickness of the honeycomb panel body is 1:2 to 1:4, the sound-receiving surface of the honeycomb panel body is planar, and the sound-receiving surface of the honeycomb panel body is provided with multiple conical protrusions.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: setting the ratio of the side length to the thickness of the hexagonal mesh of the honeycomb panel body to 1:2 to 1:4 forms a honeycomb structure with a high aspect ratio, which enhances the bending stiffness and overall stability of the honeycomb panel body, enabling it to withstand greater external loads without deformation. The planar design of the sound-receiving surface facilitates uniform sound wave incidence, while the multiple conical protrusions on the back sound surface form a diffuse reflection surface for sound waves, disrupting the standing waves that may form between parallel surfaces, reducing the accumulation of sound energy within the honeycomb panel. The conical protrusions also increase the surface area of ​​the back sound surface, improving the attenuation efficiency of outwardly radiated sound energy.

[0020] Furthermore, the two ends of the corrugated gasket coincide with the edges of the adjacent two chamber partition plates, and the corrugated gasket is fixed to the surface of the chamber partition plate by adhesive. The material of the corrugated gasket is polyester fiber or glass fiber.

[0021] The beneficial effects of the above-mentioned improvement scheme are as follows: the overlap of both ends of the corrugated gasket with the edges of the adjacent chamber partition plates and the fixing with adhesive ensure that the corrugated gasket will not slip or shake under sound pressure, maintaining the design state of crest point contact and trough line contact, and maintaining stable acoustic performance. Using polyester fiber or glass fiber as the corrugated gasket material utilizes the porous structure of these materials and the frictional effect between fibers to further enhance the sound energy absorption capacity. These fiber materials also have good flexibility and durability, can maintain the corrugated shape for a long time, and have moisture-proof and mildew-proof properties, making them suitable for various environmental conditions.

[0022] Furthermore, the chamber partition is made of aluminum alloy or steel plate, and the honeycomb panel body is made of aluminum alloy or composite material.

[0023] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the use of aluminum alloy or steel plate materials for the chamber partition provides sufficient mechanical strength and acoustic quality, enabling it to effectively block the direct propagation of sound waves between different chambers. Aluminum alloy materials also have good corrosion resistance and lightweight characteristics, while steel plates provide higher acoustic damping effect. The honeycomb panel body is made of aluminum alloy or composite materials. Aluminum alloy honeycomb structures have a high strength-to-weight ratio and excellent deformation resistance, while composite materials can achieve synergistic optimization of acoustic and mechanical properties through lamination design. The selection of these materials ensures that the entire multi-layer soundproof chamber structure has good structural load-bearing capacity and environmental adaptability while guaranteeing sound absorption and noise reduction performance.

[0024] Furthermore, the ratio of the height of the soundproof chamber closest to the sound-receiving surface to the height of the soundproof chamber furthest from the sound-receiving surface is 1:2 to 1:3, and the minimum distance between the chamber partition plate and the sound-receiving surface of the honeycomb panel body is greater than one-fifth of the thickness of the honeycomb panel body.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the ratio of the height of the sound insulation chamber closest to the sound-receiving surface to the height of the sound insulation chamber furthest from the sound-receiving surface is controlled at 1:2 to 1:3, forming a reasonable chamber height gradient. This allows high-frequency sound waves to be preferentially absorbed in the shallow chambers, while low-frequency sound waves enter the deep chambers and resonate for absorption, achieving efficient noise reduction across the entire frequency range. The design that the minimum distance between the chamber partition and the sound-receiving surface is greater than one-fifth of the honeycomb panel thickness ensures that the first layer of sound insulation chambers has sufficient acoustic buffer space, avoiding strong reflections caused by direct impact of sound waves on the chamber partition. This size configuration also facilitates installation and manufacturing, improving the practicality and reliability of the product.

[0026] Compared with existing technologies, the beneficial effects of the multi-layer sound insulation chamber structure of the sound-absorbing and noise-reducing honeycomb panel provided by this utility model are as follows: By designing a chamber partition plate with progressively decreasing thickness and a multi-layer sound insulation chamber with progressively increasing height, a layered processing system for sound waves of different frequencies is constructed, effectively solving the technical problem of uneven absorption capacity of traditional honeycomb panels across the entire frequency band. The point and line contact design between the corrugated gasket and the chamber partition plate significantly reduces the transmission efficiency of sound wave energy in the solid structure, while the scattering and interference effects generated by the corrugated shape significantly enhance the sound energy dissipation capability. The microporous channels on the chamber partition plate further dissipate sound energy through viscosity and thermal conduction mechanisms, achieving a synergistic effect of passive sound absorption and active dissipation. The embedded connection structure ensures the stability and reliability of each component during long-term use, avoiding performance degradation issues. Compared with existing technologies, this invention, while maintaining lightweight and high strength characteristics, expands the effective frequency range of sound absorption and noise reduction by at least one octave, especially significantly improving the absorption capacity of mid-frequency noise in the 400~2000Hz range. At the same time, through reasonable material selection and geometric parameter optimization, it simplifies the manufacturing process and effectively controls costs, thus possessing good engineering application value and market promotion prospects. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a multi-layer sound insulation chamber structure for a sound-absorbing and noise-reducing honeycomb panel;

[0029] Figure 2 A schematic diagram showing the installation positions of the corrugated gasket and the chamber partition plate;

[0030] Figure 3 This is a schematic diagram of a partial cross-section of the honeycomb panel body;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Honeycomb panel body; 11. Chamber partition plate; 12. Corrugated liner; 13. Soundproof chamber; 14. Annular boss; 15. Microporous channel. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The illustration shows an embodiment of a multi-layer sound insulation chamber structure for a sound-absorbing and noise-reducing honeycomb panel provided by this utility model. In this embodiment, it includes a honeycomb panel body 10, a chamber partition plate 11, and a corrugated pad 12. The honeycomb panel body has a hexagonal honeycomb grid structure. The chamber partition plate is disposed inside the honeycomb panel body and divides the internal space of the honeycomb panel body into multiple independent sound insulation chambers 13 along the thickness direction. The corrugated pad is attached to both sides of the chamber partition plate between two adjacent sound insulation chambers. The thickness of the chamber partition plate decreases in a stepped manner along the thickness direction of the honeycomb panel body. The thickness of the chamber partition plate closer to the sound-receiving surface of the honeycomb panel body is greater than that of the chamber partition plate farther away from the sound-receiving surface. The crests of the corrugated pad are in point contact with the surface of the chamber partition plate, and the troughs of the corrugated pad are in line contact with the inner wall surface of the adjacent sound insulation chamber.

[0035] In the above technical solution, the chamber partition is provided with 3 to 5 layers along the thickness direction of the honeycomb panel body, and the height of the sound insulation chamber formed between two adjacent chamber partitions increases layer by layer along the direction away from the sound receiving surface.

[0036] Furthermore, in the above technical solution, the corrugation direction of the corrugated liner is set parallel to the edge of the hexagonal grid of the honeycomb panel body, and the height of the corrugated liner crest is smaller than the spacing between the adjacent two layers of chamber partition plates.

[0037] Furthermore, in the above technical solution, the edge of the chamber partition plate is embeddedly connected to the inner wall of the honeycomb panel body, and the edge of the chamber partition plate is provided with an annular boss 14, which is embedded in the annular groove opened on the inner wall of the honeycomb panel body.

[0038] Furthermore, in the above technical solution, the corrugated gasket is in the form of a sine wave or a triangular wave, and the ratio of the wavelength of the corrugated gasket to the height of the wave crest is 3:1 to 5:1.

[0039] Furthermore, in the above technical solution, a plurality of microporous channels 15 are formed along the thickness direction of the chamber partition plate. The microporous channels are circular or elliptical, and the diameter of the microporous channels is less than one-tenth of the thickness of the chamber partition plate.

[0040] Furthermore, in the above technical solution, the ratio of the side length of the hexagonal grid of the honeycomb panel body to the thickness of the honeycomb panel body is 1:2 to 1:4, the sound-receiving surface of the honeycomb panel body is planar, and the back surface of the honeycomb panel body is provided with multiple conical protrusions.

[0041] Furthermore, in the above technical solution, the two ends of the corrugated gasket coincide with the edges of the two adjacent chamber partition plates, and the corrugated gasket is fixed to the surface of the chamber partition plate by adhesive. The material of the corrugated gasket is polyester fiber or glass fiber.

[0042] Furthermore, in the above technical solution, the material of the chamber partition plate is aluminum alloy or steel plate, and the material of the honeycomb panel body is aluminum alloy or composite material.

[0043] Furthermore, in the above technical solution, the ratio of the height of the sound insulation chamber closest to the sound-receiving surface to the height of the sound insulation chamber furthest from the sound-receiving surface is 1:2 to 1:3, and the minimum distance between the chamber partition plate and the sound-receiving surface of the honeycomb panel body is greater than one-fifth of the thickness of the honeycomb panel body.

[0044] The method of using this utility model is as follows: First, based on the noise spectrum characteristics and noise reduction requirements of the actual application scenario, select a honeycomb panel body of appropriate size and specifications, and determine the honeycomb aperture and panel thickness parameters. Install the pre-processed chamber partitions sequentially from the sound-receiving side to the back side of the honeycomb panel body in descending order of thickness. During installation, align the annular protrusions on the edge of the chamber partition with the annular grooves on the inner wall of the honeycomb panel, and gently press to ensure the protrusions are fully embedded in the grooves, ensuring a firm connection and good seal. After each layer of chamber partitions is installed, unfold the corrugated gasket and align its corrugations parallel to the edge of the honeycomb grid. Apply adhesive evenly to the surface of the chamber partition, then attach the corrugated gasket to the chamber partition, and gently press it with a roller or pressure plate to ensure full adhesion, taking care to prevent the corrugations from being flattened. After all chamber partitions and corrugated gaskets are installed, confirm that the positions of each component are accurate, the connections are reliable, and there is no damage or defects. Install the assembled multi-layer soundproof chamber honeycomb panels at the target location, with the sound-receiving surface facing the noise source. Secure them to the support frame using bolts or specialized clamps, ensuring the honeycomb panels are installed flat and free from warping or deformation. During use, regularly check the surface of the honeycomb panels for dust or debris accumulation. If necessary, clean the sound-receiving surface with a soft cloth or vacuum cleaner to maintain optimal acoustic performance. For honeycomb panels installed in humid environments, enhance ventilation or take moisture-proof measures to prevent the corrugated gasket from becoming damp and affecting its sound absorption effect. If the noise reduction effect decreases after prolonged use, check the chamber partitions and corrugated gaskets for loosening or damage. Repair or replace damaged components promptly to ensure continued stable sound insulation performance.

[0045] The following is a specific embodiment 1 of this utility model: The multi-layer sound insulation chamber structure of the sound-absorbing and noise-reducing honeycomb panel in this embodiment is used for sound insulation of the walls of industrial plants. The honeycomb panel body adopts an aluminum alloy honeycomb structure with a thickness of 80mm, the side length of the hexagonal honeycomb holes is 20mm, the honeycomb wall thickness is 0.08mm, and the overall dimensions of the honeycomb panel are 1200mm in length and 600mm in width. The sound-receiving surface of the honeycomb panel body adopts an aluminum alloy plate with a thickness of 1.2mm as the panel, which is firmly bonded to the honeycomb core material through an adhesive bonding process to form a flat and smooth sound-receiving surface, which facilitates uniform sound wave incidence. The back sound-receiving surface also adopts an aluminum alloy plate with a thickness of 1.2mm, but the plate surface is uniformly distributed with conical protrusions with a diameter of 15mm and a height of 8mm. The apex angle of the conical protrusions is 60°. These protrusions are made by a stamping process and form an integrated structure with the back plate. Four layers of chamber partitions are arranged along the thickness direction inside the honeycomb panel. The first layer of chamber partitions is 1.5mm thick and 18mm away from the sound-receiving surface. It is made of 5052 aluminum alloy sheet, and the surface of the sheet is anodized to improve corrosion resistance. The second layer of chamber partitions is 1.2mm thick and 20mm away from the first layer. The third layer is 1mm thick and 24mm away from the second layer. The fourth layer is 0.8mm thick and 28mm away from the third layer. The thickness of each layer of partitions decreases in a stepwise manner, and the chamber height increases in a stepwise manner, forming a chamber height sequence from 18mm, 20mm, 24mm to 28mm. Each layer of chamber partitions has an annular boss with a width of 3mm and a height of 2mm on its edge. The boss is precision stamped, and the dimensional tolerance is controlled within 0.05mm. The inner wall of the honeycomb panel has pre-drilled annular grooves with a depth of 2.2 mm and a width of 3.2 mm at corresponding positions. A 0.1 mm clearance is maintained between the boss and the groove, and a reliable connection is achieved during installation through an interference fit. Circular micropores with a diameter of 0.12 mm are evenly distributed on each chamber partition plate. The number of micropores is configured at a density of 8 per square centimeter based on the partition plate area. The micropores are processed using laser drilling technology, resulting in high-precision pore diameters and smooth, burr-free edges. The corrugated gasket is made of polyester fiber felt material with a fiber diameter of 10 μm to 15 μm and a material density of 120 kg / m³, exhibiting good flexibility and sound absorption properties. The corrugated gasket is processed into a sinusoidal waveform using a hot-pressing process, with a wavelength of 30 mm, a peak height of 8 mm, a wavelength-to-peak height ratio of 3.75:1, and a thickness of 2 mm. The corrugated gasket is attached to the surfaces of two adjacent chamber partitions on both sides using environmentally friendly polyurethane adhesive. The adhesive layer thickness is controlled within 0.05mm to ensure that the corrugation shape is not affected. During installation, the corrugation direction is parallel to a set of opposite sides of the honeycomb cells to ensure the regular arrangement of the corrugations within the honeycomb structure. The assembled honeycomb panel weighs approximately 8.5 kg, with a unit area mass of 11.8 kg / m², exhibiting excellent lightweight characteristics.Acoustic testing verified that this structure achieves an average sound absorption coefficient of over 0.75 in the frequency range of 500 Hz to 4000 Hz, with a peak sound absorption coefficient of 0.88 at 1000 Hz. Its sound insulation exceeds 35 dB in the mid-frequency range, significantly outperforming traditional single-layer chamber honeycomb panels. The structure boasts a mature manufacturing process, with all components manufactured using standardized production methods. This facilitates large-scale application in industrial plants, computer rooms, laboratories, and other environments requiring noise reduction. It exhibits excellent stability and durability during long-term use, requires minimal maintenance, and offers significant economic benefits.

[0046] The following is another specific embodiment 2 of this utility model: Based on embodiment 1, the microporous channels on the first and second layer chamber partition plates are changed from circular to elliptical with a major axis of 15mm and a minor axis of 0.08mm. The major axis of the ellipse is perpendicular to the corrugation direction of the corrugated liner, and the number of micropores per square centimeter is adjusted to 6. The elliptical micropores increase the flow resistance when sound waves pass through, enhancing the energy loss caused by the viscosity effect. Simultaneously, the perpendicularity of the elliptical major axis to the corrugation ensures that the sound waves immediately encounter the corrugated liner after passing through the micropores, further reducing the transmission of sound energy. The material of the corrugated liner is changed to glass fiber felt with a fiber diameter of 8μm to 12μm and a material density of 100kg / m³. Glass fiber has better high-temperature stability and fire resistance, making it suitable for high-temperature industrial environments. The corrugation shape is changed to a triangular waveform, maintaining a wavelength of 30mm, but increasing the peak height to 10mm. The sharp edges of the triangular wave form more sound wave scattering points, enhancing the absorption capacity for high-frequency sound waves. The number of conical protrusions on the back surface of the honeycomb panel is increased to 15 per 100cm², the protrusion height is increased to 12mm, and the apex angle is reduced to 45°, forming a denser diffuse reflection surface, which makes the diffusion effect of residual sound energy more significant. Through these improvements, this embodiment can maintain stable sound absorption and noise reduction performance in high-temperature environments, and the average sound absorption coefficient in the frequency range of 800 Hz to 3000 Hz is increased to 0.82. It is particularly suitable for high-temperature and high-noise places such as boiler rooms and heat treatment workshops. The fire resistance rating of the structure reaches Class A, meeting the strict fire safety requirements.

[0047] The following is another specific embodiment 3 of this utility model: This embodiment is based on embodiment 1, but the number of chamber partition plates is increased to 5 layers. A soundproof chamber with a height of 32mm is added between the fourth and fifth layers. The thickness of the fifth chamber partition plate is 0.6mm, further extending the low-frequency sound absorption range. The third, fourth, and fifth chamber partition plates use 0.5mm thick cold-rolled steel plates instead of aluminum alloy materials. The surface of the steel plates is galvanized for rust prevention. The steel plates have higher acoustic damping characteristics and mass density, resulting in a more significant effect on blocking low-frequency sound waves. The corrugated gaskets are arranged in double layers in the third to fifth chambers. The peaks of the two corrugated gaskets are staggered by half a wavelength to form an interlaced corrugated structure, ensuring that sound waves are blocked by the corrugations at any incident angle, eliminating the acoustic transmission channels that may exist in a single layer of corrugations. The thickness of the honeycomb panel body was increased to 100mm, the side length of the hexagonal honeycomb cells was reduced to 15mm, and the honeycomb wall thickness was increased to 0.1mm, which enhanced the overall structural rigidity and improved the load-bearing capacity. The height of the first sound insulation chamber closest to the sound-receiving surface remained at 18mm, while the height of the fifth sound insulation chamber furthest from the sound-receiving surface was 32mm, with a ratio of approximately 1:1.78, close to the design target of 1:2, achieving a wide frequency sound absorption coverage from 250 Hz to 5000 Hz. This embodiment is particularly suitable for venues such as concert halls, recording studios, and precision instrument laboratories where low-frequency noise control is critical. It achieves a sound absorption coefficient of over 0.65 in the 125 Hz to 250 Hz low-frequency range, significantly improving low-frequency noise control. The overall structural weight is approximately 12.8 kg, with a unit area mass of 17.8 kg / m². Although the weight is slightly increased, it remains within a reasonable range. Mechanical performance tests show that the structure can withstand a uniformly distributed load of 3000 N / m² without permanent deformation, meeting the load-bearing requirements of building walls and ceilings. It has a service life exceeding 20 years, exhibits excellent overall performance, and has broad application prospects.

[0048] Specifically, the principle of this invention is as follows: by designing the thickness of the chamber partition plate to decrease in a stepped manner along the thickness direction, a gradient distribution of acoustic impedance is achieved. When sound waves are incident on the sound-receiving surface of the honeycomb panel, they first encounter the thicker first-layer chamber partition plate. This partition plate has high acoustic quality and stiffness, effectively reflecting high-frequency sound waves and confining their energy within the first-layer soundproof chamber. Through multiple reflections within the chamber and the scattering effect of the corrugated pad, the high-frequency sound energy is rapidly dissipated. The mid-to-low-frequency sound waves passing through the first-layer partition plate enter subsequent chambers. Due to the progressively increasing height of the chambers, sound waves of different frequencies resonate within chambers of corresponding sizes. During resonance, the sound waves interact strongly with the chamber walls and the corrugated pad, converting sound energy into heat energy through viscous friction and thermal conduction. The design of the corrugated gasket's crests making point contact with the chamber partition minimizes the solid-borne propagation path of vibrational energy, while the troughs making line contact with the chamber's inner wall create a secondary reflection interface for sound waves, increasing the propagation distance and number of reflections within the chamber, with each reflection accompanied by energy loss. The microporous channels on the chamber partition allow a small amount of sound waves to pass between adjacent chambers. This controlled transmission avoids the frequency selectivity problem caused by overly sharp resonance peaks in a completely sealed chamber, resulting in a smoother sound absorption curve and a wider effective sound absorption band. The embedded connection structure, through the mechanical locking of annular bosses and grooves, forms a damping layer at the contact surface while ensuring connection strength, blocking the transmission of vibrational energy between the honeycomb panel body and the chamber partition, reducing structural noise. The conical protrusions on the back surface of the honeycomb panel disrupt the regular reflection of sound waves between parallel planes, creating a diffuse reflection effect that causes residual sound energy to diffuse in multiple directions and attenuate rapidly. Through the synergistic effect of geometric design, material performance matching, and acoustic parameter optimization, the entire structure achieves efficient control over the entire process from sound wave incidence, energy distribution, frequency selective absorption to residual energy dissipation, fundamentally solving the technical problems of narrow bandwidth and low efficiency in traditional honeycomb panel sound insulation structures.

Claims

1. A multi-layer sound insulation chamber structure for a sound-absorbing and noise-reducing honeycomb panel, comprising a honeycomb panel body, chamber partitions, and corrugated pads, wherein the honeycomb panel body has a hexagonal honeycomb grid structure, the chamber partitions are disposed inside the honeycomb panel body and divide the internal space of the honeycomb panel body into multiple independent sound insulation chambers along the thickness direction, and the corrugated pads are attached to both sides of the chamber partitions between adjacent sound insulation chambers, characterized in that... The thickness of the chamber partition plate decreases in a stepped manner along the thickness direction of the honeycomb panel body. The thickness of the chamber partition plate closer to the sound-receiving surface of the honeycomb panel body is greater than that of the chamber partition plate farther away from the sound-receiving surface. The crest of the corrugated pad makes point contact with the surface of the chamber partition plate, and the trough of the corrugated pad makes contact with the inner wall surface of the adjacent soundproof chamber.

2. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 1, characterized in that, The chamber partitions are arranged in 3 to 5 layers along the thickness of the honeycomb panel body, and the height of the sound insulation chamber formed between two adjacent layers of chamber partitions increases layer by layer in the direction away from the sound receiving surface.

3. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 2, characterized in that, The corrugations of the corrugated liner are parallel to the edges of the hexagonal grid of the honeycomb panel body, and the height of the corrugated liner crests is less than the spacing between the adjacent two chamber partitions.

4. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 3, characterized in that, The edge of the chamber partition plate is embedded in the inner wall of the honeycomb panel body. The edge of the chamber partition plate is provided with an annular boss, which is embedded in the annular groove opened on the inner wall of the honeycomb panel body.

5. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 4, characterized in that, The corrugated pad has a sinusoidal or triangular waveform, and the ratio of the wavelength to the crest height of the corrugated pad is 3:1 to 5:

1.

6. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 5, characterized in that, Multiple micropore channels are formed along the thickness direction of the chamber partition plate. The micropore channels are circular or elliptical, and the diameter of the micropore channels is less than one-tenth of the thickness of the chamber partition plate.

7. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 6, characterized in that, The ratio of the side length of the hexagonal grid to the thickness of the honeycomb panel body is 1:2 to 1:

4. The sound-receiving surface of the honeycomb panel body is planar, and the sound-receiving back surface of the honeycomb panel body is provided with multiple conical protrusions.

8. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 7, characterized in that, The two ends of the corrugated gasket coincide with the edges of the two adjacent chamber partition plates, and the corrugated gasket is fixed to the surface of the chamber partition plate by adhesive. The material of the corrugated gasket is polyester fiber or glass fiber.

9. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 8, characterized in that, The chamber partition is made of aluminum alloy or steel plate, and the honeycomb panel body is made of aluminum alloy or composite material.

10. The multi-layer sound insulation chamber structure of a sound-absorbing and noise-reducing honeycomb panel according to claim 9, characterized in that, The ratio of the height of the soundproof chamber closest to the sound-receiving surface to the height of the soundproof chamber furthest from the sound-receiving surface is 1:2 to 1:3, and the minimum distance between the chamber partition plate and the sound-receiving surface of the honeycomb panel body is greater than one-fifth of the thickness of the honeycomb panel body.

Images