Silencing system for suppressing noise of high-pressure gas and setting method

Abstract

The invention relates to a noise elimination system for noise suppression of high-pressure gas and a setting method of the noise elimination system. The setting method comprises the steps that main frequency components and sound pressure level distribution of noise to be eliminated are analyzed, the target frequency range and the noise reduction amount are determined, a proper sound absorption composite layer material is selected, and the size of a small noise elimination chamber, the size of a noise elimination channel and the size of a noise elimination elbow are designed. The noise reduction amount of each position and the whole is accurately calculated through a sound attenuation formula based on materials and sizes; and if the calculation result does not meet the requirement, adjusting the structure parameter until the requirement is met. The modular design allows flexible configuration of the silencing system to adapt to different equipment and scene requirements, meanwhile, installation and debugging are simplified, and the cost is reduced. The noise suppression effect is remarkably improved, the service life of the system is prolonged, and the requirement of sustainable development is met.

Description

Technical Field

[0001] The present invention relates to the technical field of noise control and acoustic engineering, and in particular to a silencing system and a setting method for suppressing high-pressure gas noise. Background Art

[0002] The noise generated during the high-pressure gas discharge process not only affects the operating environment of industrial equipment, but also poses a threat to the health of operators. Therefore, high-pressure gas noise control has become an important research direction in the field of acoustic engineering. Current technologies analyze the acoustic characteristics of noise, such as frequency and amplitude, and usually use diffusion speed reduction or throttling and pressure reduction methods to reduce the generation and propagation of airflow noise. However, these traditional technologies have limited effects when dealing with high-frequency broadband noise and cannot fully meet the needs of practical applications.

[0003] As a core component of noise control, the muffler improves the noise reduction effect by optimizing the geometric shape and internal structure in existing technologies. For example, multi-stage throttling orifice plates, complex reflective plates, or designs that extend the sound wave propagation path can reduce noise to a certain extent. However, these designs have limited control effects on the high-frequency noise generated by the tail of the high-pressure gas purge tank. In addition, the requirements for noise reduction performance in different application scenarios vary greatly, and the existing muffler design is difficult to fully adapt, resulting in limited usage scenarios.

[0004] Although existing technologies have achieved control over high-pressure gas noise to a certain extent, there are still many shortcomings. For example, the noise reduction effect is limited to a specific frequency range, especially for high-frequency broadband noise; the applicability is limited and it is difficult to meet the needs of different scenarios; and due to the complex structure and high manufacturing cost, it is difficult to maintain and replace.

[0005] In view of the above problems, the present invention is proposed. Summary of the invention

[0006] The invention discloses a silencing system and a setting method for suppressing high-pressure gas noise, aiming to solve the technical problems existing in the prior art.

[0007] According to one aspect of the present invention, there is provided a method for setting up a silencing system for suppressing high-pressure gas noise, comprising:

[0008] The main frequency components and sound pressure level distribution of the noise to be silenced are obtained by analysis and measurement, and the target frequency range and noise reduction amount of the noise reduction are determined based on the main frequency components and sound pressure level distribution;

[0009] Select the material of the sound-absorbing composite layer according to the target frequency range and noise reduction amount; design the size of the anechoic chamber, anechoic channel and anechoic elbow according to the actual scene requirements;

[0010] Based on the material and size, the sound attenuation at different locations of the silencer system and the total sound attenuation are calculated according to the following formula:

[0011]

[0012] Where:

[0013] ΔL—sound attenuation of the silencing system, in dB;

[0014] K—The sound absorption coefficient related to the sound absorption material coefficient, using the Schiller calculation formula: K = 1.5a0;

[0015] P—the circumference of the cross section of the muffler channel, in m;

[0016] S—cross-sectional area of ​​silencing channel, in m 2 ;

[0017] L—the length of the silencer system, in meters;

[0018] Determine whether the sound attenuation amount and the total sound attenuation amount meet the target frequency range and noise reduction amount;

[0019] If it is satisfied, the muffler system will be manufactured and installed;

[0020] If not, modify the size design of the anechoic chamber, anechoic channel and anechoic elbow until the target frequency range and noise reduction are met.

[0021] As a preferred technical solution, the sound-absorbing composite layer includes a protective layer, a sound-absorbing layer, a damping layer and a supporting layer. The protective layer is made of metal plate or polymer plate, the sound-absorbing layer is made of glass fiber, rock wool or polyester fiber, the damping layer is made of rubber or polymer, and the supporting layer is made of metal plate, hard plastic or high-strength composite material.

[0022] As a preferred technical solution, the ratio of the thickness of the sound absorbing layer to the thickness of the supporting layer should be ≥5; the ratio of the thickness of the damping layer to the thickness of the supporting layer should be ≥2.

[0023] As a preferred technical solution, the sound-absorbing composite layer is arranged inside the anechoic chamber.

[0024] As a preferred technical solution, there are multiple sound absorbing composite layers, and the multiple sound absorbing composite layers are evenly distributed in rows.

[0025] According to another aspect of the present invention, a silencing system designed according to the above-mentioned setting method is provided, wherein the silencing chamber further comprises a plurality of silencing cavities, which are cylindrical cavities and are evenly arranged in rows at the bottom of the silencing chamber.

[0026] As a preferred technical solution, the muffler channel includes a first muffler channel and a plurality of second muffler channels, the first muffler channel is connected to the bottom of the muffler chamber, and the plurality of second muffler channels are respectively connected to the first muffler channel.

[0027] As a preferred technical solution, the first sound-absorbing channel adopts a rectangular parallelepiped or other quadrilateral placed in the vertical direction; the second sound-absorbing channel adopts a rectangular parallelepiped or other quadrilateral placed in the horizontal direction.

[0028] As a preferred technical solution, a plurality of silencer elbows are respectively provided at the ends of the plurality of second silencer channels away from the first silencer channels.

[0029] As a preferred technical solution, the number of the second silencer channels is the same as the number of the silencer elbows.

[0030] The technical solution adopted by the present invention can achieve at least one of the following beneficial effects:

[0031] 1. The present invention achieves significant noise reduction within the target frequency range by comprehensively analyzing the main frequency components and sound pressure level distribution of the noise, combining a multi-layer sound-absorbing composite layer with an optimized anechoic chamber, channel and elbow design. The accurate calculation of the anechoic volume formula is used to ensure that the overall sound attenuation performance of the system meets the design requirements. This technology significantly reduces the operating noise of high-pressure gas equipment, provides a quieter and more comfortable working environment for the equipment operating environment, and reduces the negative impact of noise on personnel health.

[0032] 2. The present invention adopts a modular design, which allows the size and configuration of the anechoic chamber, channel and elbow to be flexibly adjusted according to the size, noise characteristics and actual scene requirements of different high-pressure gas equipment. The material and structure of the sound-absorbing composite layer can be customized according to the target frequency range and noise reduction amount to meet the requirements of different industrial application scenarios. This efficient adaptability greatly improves the versatility of the system, while optimizing the installation and commissioning process and reducing the user's design and operating costs.

[0033] 3. The present invention adopts a multi-layer sound-absorbing composite structure consisting of a protective layer, a sound-absorbing layer, a damping layer and a supporting layer, combined with an optimized geometric design, which greatly improves the acoustic performance. The thickness ratio design of the sound-absorbing layer and the supporting layer and the material selection further enhance the noise absorption efficiency while maintaining good mechanical strength and durability. This innovative combination design not only extends the service life of the system, but also provides excellent long-term noise reduction effect, meeting the requirements of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0035] Figure 1 It is a three-dimensional structural schematic diagram of a silencing system for suppressing high-pressure gas noise according to the present invention;

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the interior of the muffler chamber of the present invention;

[0037] Figure 3 The present invention is a flow chart of a method for setting up a silencing system for suppressing high-pressure gas noise.

[0038] Description of reference numerals:

[0039] 1. Silence chamber; 11. Silence cavity; 12. Sound-absorbing composite layer; 2. Silence louver; 3. Silence channel; 31. First silence channel; 32. Second silence channel; 4. Silence elbow. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a silencing system for suppressing high-pressure gas noise, and in particular relates to a noise suppression scenario of a high-pressure gas blowing the tail of a tank body, such as Figure 1-2 As shown, it includes a silencer chamber 1, a silencer shutter 2, a silencer channel 3 and a silencer elbow 4. The silencer shutter 2 is arranged at the top of the silencer chamber 1 to reduce the noise generated during the discharge of high-pressure gas. When the airflow passes through the silencer shutter 2, multiple refractions, diffusions and energy attenuation occur, thereby reducing the intensity of sound wave propagation. The silencer chamber 1 is used to provide a buffer and noise reduction space for the discharge of high-pressure gas. Its internal structure is optimized and designed to effectively reduce the sound wave energy carried by the high-speed airflow. The silencer channel 3 is arranged below the silencer chamber 1 to guide the high-pressure gas through the functional components of the silencer system and further weaken the noise generated by the gas flow in the process. The silencer elbow 4 is connected to the silencer channel 3 to change the flow direction of the high-pressure gas and effectively attenuate the noise in the airflow.

[0044] like Figure 2 As shown, the anechoic chamber 1 includes a plurality of anechoic cavities 11 and a plurality of sound absorbing composite layers 12. The plurality of anechoic cavities 11 are evenly arranged in a row at the bottom of the anechoic chamber 1, and the anechoic cavities 11 are cylindrical cavities. The plurality of sound absorbing composite layers 12 are arranged above the anechoic cavities 11, and the plurality of sound absorbing composite layers 12 are also evenly arranged in a row. Preferably, the sound-absorbing composite layer 12 is configured to include a protective layer, a sound-absorbing layer, a damping layer and a supporting layer connected in sequence from top to bottom. The protective layer is made of metal plates or polymer plates, and has sufficient hardness to protect the internal structure of the anechoic chamber 1 and prevent the external environment from damaging the anechoic chamber 1. The sound-absorbing layer uses partially hollow sound-absorbing materials, such as glass fiber, rock wool or polyester fiber, etc., to absorb sound wave energy in the air, thereby reducing the noise level inside the anechoic chamber 1. The damping layer uses elastic materials, such as rubber or polymers, etc., and the damping layer is partially hollow inside to reduce structural vibration, thereby reducing noise transmission inside the anechoic chamber 1. The supporting layer is made of metal plates, hard plastics or high-strength composite materials to provide structural strength and stability. The combination of the above-mentioned multiple anechoic cavities 11 and multiple sound-absorbing composite layers 12 can effectively improve the absorption and isolation capabilities of the anechoic chamber 1 against high-pressure gas noise.

[0045] like Figure 1As shown, the muffler channel 3 includes a first muffler channel 31 and a plurality of second muffler channels 32, the first muffler channel 31 is arranged at the bottom of the muffler chamber 1 and is directly connected to the muffler chamber 1, and the first muffler channel 31 is in the shape of a cuboid or other quadrilateral placed in the vertical direction; the plurality of second muffler channels 32 are respectively connected to the first muffler channel 31, and the plurality of second muffler channels 32 are in the shape of a cuboid or other quadrilateral, and the plurality of second muffler channels 32 are placed in the horizontal direction. Preferably, the number of the second muffler channels 32 is 1-4. Further preferably, the number of the second muffler channels 32 is 3, so as to meet the layout requirements of the on-site relaxation gas and high-pressure gas outlet.

[0046] like Figure 1 As shown, the muffler system further includes a plurality of muffler elbows 4, which are respectively arranged at the ends of the plurality of second muffler channels 32 away from the first muffler channels 31, and through their curved structural design, extend the sound wave propagation path and cause multiple reflections, so that the energy is gradually weakened. Preferably, the number of the plurality of muffler elbows 4 is the same as the number of the plurality of second muffler channels 32.

[0047] Through the above-mentioned structural design, the embodiment of the present invention adopts a multi-stage structural design to achieve effective suppression of noise during the high-pressure gas discharge process. First, the high-pressure gas enters the silencer chamber 1. Under the combined action of the optimized multiple silencer cavities 11 and the sound-absorbing composite layer 12, the sound wave energy is absorbed, diffused and significantly weakened, providing a preliminary noise reduction effect. Subsequently, the gas flows into the silencer channel 3, wherein the first silencer channel 31 and the multiple second silencer channels 32 further guide the airflow and perform secondary attenuation of the noise through their internal structures. Finally, the gas passes through multiple silencer elbows 4, whose curved structure extends the sound wave propagation path and induces multiple reflections and absorption, further reducing the noise energy. Through the synergistic effect of various functional components, the system can effectively suppress the propagation of noise during the high-pressure gas discharge process and significantly improve the environmental noise level.

[0048] In some preferred embodiments, in order to increase the noise reduction effect of the sound-absorbing composite layer 12, the ratio of the thickness of the sound-absorbing layer to the thickness of the supporting layer should be ≥5, ensuring that the sound-absorbing layer can give full play to its sound absorption performance, absorb the reverberation sound in the cover, thereby reducing the sound energy density in the cover and improving the sound insulation effect, while taking into account the influence of the sound-absorbing layer on the overall structure of the sound insulation cover, such as weight, stability, etc.; the ratio of the thickness of the damping layer to the thickness of the supporting layer should be ≥2. When the supporting layer is disturbed, it will vibrate and radiate noise to the surrounding environment. Ensure that the damping layer can absorb the vibration energy and convert it into heat energy or other forms of energy dissipation, thereby reducing noise radiation.

[0049] The embodiment of the present invention further provides a method for setting the above-mentioned muffler system, comprising:

[0050] Step S1: performing detailed spectrum analysis and sound pressure level measurement on the high-speed airflow noise generated by high-pressure gas purge to obtain the main frequency components and sound pressure level distribution of the noise, and based on the above results, determining the target frequency range and noise reduction amount of noise reduction;

[0051] Step S2: According to the noise reduction requirements in step S1, the materials of the face layer, the sound absorbing layer, the damping layer and the supporting layer in the sound absorbing composite layer 12 are selected; according to the actual scene requirements, the sizes of the anechoic chamber 1, the anechoic channel 3 and the anechoic elbow 4 are designed;

[0052] Step S3: According to the following formula, select different positions of the noise cancellation system and calculate the noise reduction amount:

[0053]

[0054] Where:

[0055] ΔL—sound attenuation of the silencing system, in dB;

[0056] K—The sound absorption coefficient related to the sound absorption material coefficient, using the Schiller calculation formula: K = 1.5a0;

[0057] P—the circumference of the cross section of the muffler channel, in m;

[0058] S—cross-sectional area of ​​silencing channel, in m 2 ;

[0059] L—the length of the silencer system, in meters;

[0060] According to the above sound attenuation calculation results, the total sound attenuation is calculated according to the following formula:

[0061]

[0062] Where:

[0063] ΔL—sound attenuation of the silencing system, in dB;

[0064] Step S4: judging whether the target frequency range and noise reduction amount in step S1 are met according to the above calculation results;

[0065] If it is satisfied, the muffler system will be manufactured and installed;

[0066] If not, the design scheme in step S2 is modified until the target frequency range and noise reduction amount are met.

[0067] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for setting up a silencing system for suppressing high-pressure gas noise, characterized in that: include: Obtaining the main frequency components and sound pressure level distribution of the noise to be silenced by analysis and measurement, and determining the target frequency range and noise reduction amount of noise reduction based on the main frequency components and sound pressure level distribution; Selecting the material of the sound absorbing composite layer according to the target frequency range and noise reduction amount; Design the dimensions of the anechoic chamber, anechoic channel and anechoic elbow according to actual scene requirements; Based on the materials and dimensions, the sound attenuation at different positions of the sound attenuation system and the total sound attenuation are calculated according to the following formula: Where: ΔL—sound attenuation of the silencing system, in dB; K—The sound absorption coefficient related to the sound absorption material coefficient, using the Schiller calculation formula: K = 1.5a0; P—the circumference of the cross section of the muffler channel, in m; S—cross-sectional area of ​​silencing channel, in m 2 ; L—the length of the silencer system, in meters; Determining whether the sound attenuation amount and the total sound attenuation amount meet the target frequency range and noise reduction amount; If satisfied, manufacture and install the muffler system; If not, the size design of the muffler chamber, the muffler channel and the muffler elbow is modified until the target frequency range and noise reduction amount are met.

2. The setting method according to claim 1, characterized in that: The sound absorbing composite layer comprises a protective layer, a sound absorbing layer, a damping layer and a supporting layer. The protective layer is made of a metal plate or a polymer plate, the sound absorbing layer is made of glass fiber, rock wool or polyester fiber, the damping layer is made of rubber or polymer, and the supporting layer is made of a metal plate, hard plastic or a high-strength composite material.

3. The setting method according to claim 2, characterized in that: The ratio of the thickness of the sound absorbing layer to the thickness of the supporting layer should be ≥5; the ratio of the thickness of the damping layer to the thickness of the supporting layer should be ≥2.

4. The setting method according to claim 1, characterized in that: The sound absorbing composite layer is arranged inside the muffler chamber.

5. The setting method according to claim 4, characterized in that: The number of the sound absorbing composite layers is multiple, and the multiple sound absorbing composite layers are evenly distributed in rows.

6. A muffler system designed according to the setting method according to any one of claims 1 to 5, characterized in that: The muffler chamber further comprises a plurality of muffler cavities, which are cylindrical cavities and are evenly arranged in rows at the bottom of the muffler chamber.

7. The sound-absorbing system according to claim 6, characterized in that: The muffler channel includes a first muffler channel and a plurality of second muffler channels, the first muffler channel is connected to the bottom of the muffler chamber, and the plurality of second muffler channels are respectively connected to the first muffler channel.

8. The sound-absorbing system according to claim 7, characterized in that: The first muffler channel adopts a cuboid or other quadrilateral placed in a vertical direction; the second muffler channel adopts a cuboid or other quadrilateral placed in a horizontal direction.

9. The sound-absorbing system according to claim 7, characterized in that: Ends of the plurality of second muffler channels away from the first muffler channel are respectively provided with a plurality of muffler elbows.

10. The sound-absorbing system according to claim 9, characterized in that: The number of the second muffler channels is the same as the number of the muffler elbows.

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