CN116123381B - Broadband noise elimination structure based on curling cavity - Google Patents

Broadband noise elimination structure based on curling cavity Download PDF

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Publication number
CN116123381B
CN116123381B CN202211668932.4A CN202211668932A CN116123381B CN 116123381 B CN116123381 B CN 116123381B CN 202211668932 A CN202211668932 A CN 202211668932A CN 116123381 B CN116123381 B CN 116123381B
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cavity
sound
plate
curled
shaped plate
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CN116123381A (en
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韩雷
江奕
赵睿楠
陈威
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Nanjing Vocational University of Industry Technology NUIT
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Nanjing Vocational University of Industry Technology NUIT
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02736—Throttle passages using transversal baffles defining a tortuous path

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Exhaust Silencers (AREA)

Abstract

本发明公开了一种基于卷曲腔体的宽频带消声结构，涉及降噪结构领域，包括消声框架、卷曲腔体、进声管、出声管以及局部共振单元，所述消声框架的内部设有卷曲腔体且所述卷曲腔体的上、下两侧分别连通有所述进声管和出声管，所述卷曲腔体内借助于分隔板一和分隔板二分隔形成供声音流动的S型通道且所述S型通道的部分转角处设有所述局部共振单元，所述局部共振单元通过腔体共振吸收卷曲腔体中传播的噪音，本发明基于卷曲腔体结构，构建了具有低频、宽带、结构简单、轻薄的消声结构。

The present invention discloses a wide-band sound-absorbing structure based on a curled cavity, which relates to the field of noise reduction structures and comprises a sound-absorbing frame, a curled cavity, a sound inlet pipe, a sound outlet pipe and a local resonance unit. The sound-absorbing frame is provided with a curled cavity inside and the upper and lower sides of the curled cavity are respectively connected with the sound inlet pipe and the sound outlet pipe. The curled cavity is divided into an S-shaped channel for sound flow by means of a first partition plate and a second partition plate, and the local resonance unit is provided at some corners of the S-shaped channel. The local resonance unit absorbs the noise propagating in the curled cavity through cavity resonance. Based on the curled cavity structure, the present invention constructs a low-frequency, broadband, simple-structured and light sound-absorbing structure.

Description

Broadband noise elimination structure based on curling cavity
Technical Field
The invention relates to the field of noise reduction structures, in particular to a broadband noise elimination structure based on a curled cavity.
Background
The control of low-frequency noise of the pipeline has close relation with daily life of people, and is a hot spot and a difficult point of research in recent years. The control of line noise by means of a muffler has become the most common means.
The traditional absorption muffler made of porous and fiber sound absorption materials can effectively absorb medium-high frequency noise and has little effect on low frequency noise. The conventional resistive muffler is mainly two kinds of resonance type mufflers, such as Helmholtz mufflers, which have good suppression performance for low frequency noise, and expansion cavity type mufflers, which have good wideband performance, but have good noise reduction performance due to resonance characteristics of resonators, which have noise reduction effects only in an extremely narrow frequency band, so that a plurality of resonators having different resonance frequencies are generally used in parallel/series to expand noise reduction bandwidths, but have good frequency characteristics and noise reduction performance depending mainly on the length of an expansion cavity and the expansion ratio. Therefore, the use of a resistive muffler necessarily increases the volume of the structure for low frequency broadband noise, and becomes bulky and heavy.
Disclosure of Invention
The invention aims to provide a broadband silencing structure based on a curled cavity, which is used for solving the problems that a silencer is poor in noise reduction effect, large in size and inconvenient to use.
The utility model provides a broadband sound attenuation structure based on crimping cavity, includes noise elimination frame, crimping cavity, advances sound pipe, goes out sound pipe and local resonance unit, the inside of noise elimination frame be equipped with crimping cavity just the upper and lower both sides of crimping cavity communicate respectively have advance sound pipe and play sound pipe, the inside S type passageway that forms the confession sound flow with the help of division board one and division board separation in the crimping cavity just the partial corner department of S type passageway is equipped with local resonance unit, local resonance unit absorbs the noise that propagates in the crimping cavity through cavity resonance.
Preferably, a plurality of partition plates are distributed on the inner walls of the two sides of the curling cavity at equal intervals, namely a first partition plate and a second partition plate, the first partition plate and the second partition plate are of a staggered structure at intervals, a sound transmission channel is reserved between the end parts of the first partition plate and the second partition plate and the inner wall of the silencing frame, so that an S-shaped channel for sound wave transmission is formed in the curling cavity, and the two ends of the S-shaped channel are respectively communicated with the sound inlet pipe and the sound outlet pipe.
Preferably, the surfaces of the first partition plates which are distributed at intervals are provided with small hole arrays, and the small hole arrays are communicated with the S-shaped channels.
Preferably, the cross-sectional area of the crimp cavity is 5 times the cross-sectional area of the sound inlet tube and the cross-sectional area of the sound outlet tube.
Preferably, the local resonance unit comprises an extension plate, a first T-shaped plate, a second T-shaped plate and a third T-shaped plate, wherein the extension plate is fixedly connected with the end parts of the first two adjacent partition plates and the second partition plate, one side of the vertical part of the first T-shaped plate is opposite to the extension plate, a sound transmission channel is reserved between the two opposite sides of the vertical part of the first T-shaped plate, the second T-shaped plate and the third T-shaped plate are respectively arranged, the sound transmission channel is reserved between the vertical part of the second T-shaped plate and the vertical part of the first T-shaped plate, the horizontal parts of the first T-shaped plate, the second T-shaped plate and the third T-shaped plate are fixedly connected with the inner wall of the silencing frame, and a first resonance cavity is reserved between the vertical parts of the second T-shaped plate and the third T-shaped plate and the inner wall of the silencing frame.
Preferably, the first T-shaped plate faces to one side of the second T-shaped plate and one side of the third T-shaped plate are horizontally and vertically fixedly connected with a partition plate, the partition plate is fixedly connected with the inner wall of the silencing frame, and the partition plate penetrates through the first resonant cavity to divide the first resonant cavity into an upper cavity and a lower cavity, and the lengths of the upper cavity and the lower cavity are different.
Preferably, the sound inlet pipe and the sound outlet pipe are fixed on the silencing frame in an inserted structure, two sides of the sound inlet pipe and the sound outlet pipe are respectively and fixedly connected with a fixing plate, and a second resonant cavity is reserved between the fixing plates and the inner wall of the silencing frame.
Preferably, the materials used in the sound inlet pipe, the sound outlet pipe, the curling cavity, the first partition plate, the second partition plate, the extension plate, the first T-shaped plate, the second T-shaped plate and the third T-shaped plate are hard materials such as resin, plastic or metal, and the S-shaped channel, the first resonant cavity and the second resonant cavity are filled with porous sound absorbing materials.
The invention has the following advantages:
When sound waves enter the curled cavity through the sound inlet pipe, the forward sound waves are reflected due to impedance mismatch caused by abrupt change of the cross section in the cavity, and the S-shaped channel effectively prolongs the propagation path of the sound waves, so that the noise reduction capability of low-frequency noise can be greatly improved; in addition, the local resonance unit is utilized to sequentially generate resonance so as to realize noise elimination compensation on a frequency band with poor noise reduction capability, further improve the noise reduction capability at noise elimination valleys and finally realize the noise elimination effect in a low-frequency and continuous broadband range. The invention uses the curled cavity to replace the traditional straight-through cavity, so that the structure becomes lighter, thinner and simpler, overcomes the defects of narrow silencing frequency band, large structure volume, poor environmental adaptability and the like of the traditional pipeline silencing device, and is easy to be practically applied in different space and noise environments.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the present invention.
FIG. 3 is a schematic view of the structure A of FIG. 2
FIG. 4 is a front view of the internal structure of the present invention;
FIG. 5 is a schematic diagram of the sound flow of the present invention;
in the figure, the reference numeral 1, a sound elimination frame, 10, a sound inlet pipe, 11, a sound outlet pipe, 12, a curled cavity, 13, a first partition plate, 14, a second partition plate, 15, a small hole array and 16, S-shaped channels;
2. A local resonance unit; 20, an extension plate, 21, a T-shaped plate I, 22, a T-shaped plate II, 23, a T-shaped plate III, 24, a resonant cavity I, 25, a fixed plate, 26, a baffle plate, 27 and a resonant cavity II.
Detailed Description
The following detailed description of the embodiments of the invention, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate, and thorough understanding of the inventive concepts and aspects of the invention by those skilled in the art.
As shown in fig. 1-5, the invention provides a broadband sound attenuation structure based on a curled cavity, which comprises a sound attenuation frame 1, a curled cavity 12, a sound inlet pipe 10, a sound outlet pipe 11 and a local resonance unit 2, wherein the curled cavity 12 is arranged in the sound attenuation frame 1, the sound inlet pipe 10 and the sound outlet pipe 11 are respectively communicated with the upper side and the lower side of the curled cavity 12, an S-shaped channel 16 for sound flow is formed in the curled cavity 12 by means of separation of a first separation plate 13 and a second separation plate 14, the local resonance unit 2 is arranged at a part of corners of the S-shaped channel 16, and the local resonance unit 2 absorbs noise transmitted in the curled cavity 12 through cavity resonance.
A plurality of partition plates are distributed on the inner walls of the two sides of the curled cavity 12 at equal intervals, namely a first partition plate 13 and a second partition plate 14, the first partition plate 13 and the second partition plate 14 are of a staggered structure at intervals, a sound transmission channel is reserved between the end parts of the first partition plate 13 and the second partition plate 14 and the inner wall of the silencing frame 1, so that an S-shaped channel 16 for sound wave transmission is formed in the curled cavity 12, and two ends of the S-shaped channel 16 are respectively communicated with the sound inlet pipe 10 and the sound outlet pipe 11. The surfaces of the first partition plates 13 which are distributed at intervals are provided with small hole arrays 15, and the small hole arrays 15 are communicated with the S-shaped channels 16. The cross-sectional area of the crimp cavity 12 is 5 times the cross-sectional area of the sound inlet tube 10 and the sound outlet tube 11.
The sound inlet pipe 10 and the sound outlet pipe 11 are used for being connected with a noise main pipe, and the propagation path of the incident sound wave after entering the curling cavity 12 is shown in fig. 5. The curling cavity 12 is divided into an S-shaped channel 16 by a first division plate 13 and a second division plate 14, and the effective length, the sectional area and the number of segments of the S-shaped channel 16 are adjusted according to the noise attribute. The first partition plate 13 for constructing the curling cavity is provided with a small hole array 15, so that the first partition plate 13 forms a perforated partition plate and forms a perforated plate sound absorption structure with the S-shaped channel 16. Because the sound pressure difference of the S-shaped channels 16 on the two sides of the perforated partition plate causes sound waves to move back and forth on the two sides of the small hole array 15, the back and forth vibration of air in the small holes dissipates sound energy, so that a sound attenuation effect is formed, and the S-shaped channels 16 effectively prolong the propagation path of the sound waves, so that the noise reduction capability of low-frequency noise can be greatly improved.
The local resonance unit 2 comprises an extension plate 20, a first T-shaped plate 21, a second T-shaped plate 22 and a third T-shaped plate 23, wherein the end parts of the two adjacent first partition plates 13 and the second partition plates 14 are fixedly connected with the extension plate 20, one side of the vertical part of the first T-shaped plate 21 is opposite to the extension plate 20, a sound transmission channel is reserved between the two opposite sides of the vertical part of the first T-shaped plate 21, the second T-shaped plate 22 and the third T-shaped plate 23 are respectively provided with a second T-shaped plate 22 and a third T-shaped plate 23, a sound transmission channel is reserved between the vertical parts of the second T-shaped plate 22 and the third T-shaped plate 23 and the vertical part of the first T-shaped plate 21, the horizontal parts of the first T-shaped plate 21, the second T-shaped plate 22 and the third T-shaped plate 23 are fixedly connected with the inner wall of the silencing frame 1, a first resonant cavity 24 is reserved between the vertical parts of the second T-shaped plate 22 and the third T-shaped plate 23, one side of the first T-shaped plate 21 faces the second T-shaped plate 23 is horizontally and vertically fixedly connected with a baffle 26, and the first resonant cavity 24 is fixedly connected with the first resonant cavity 24 and the second resonant cavity 24 is penetrated through the first baffle 24 and the first resonant cavity 24.
The sound transmission channel that supplies the sound wave to flow is left between extension board 20, T template one 21, avoids sound to be stopped up in S type passageway 16, T template two 22 and T template three 23 vertical portion with also leave the sound transmission channel between the vertical portion of T template one 21, T template two 22 and T template three 23 vertical portion with leave resonant cavity one 24 between the inner wall of noise elimination frame 1, the sound wave flows into in proper order along the sound transmission channel between extension board 20 and the T template one sound transmission channel between vertical portion of T template two 22 and T template three 23 with in the resonant cavity one 24, also can prolong the propagation path of sound wave, effectively absorb the noise, and in addition the sound wave is in resonant cavity one 24 repeatedly striking resonant cavity one 24' S chamber wall, produces the dissipative effect to the sound energy, and in the upper and lower two chambers of resonant cavity one 24 can be got into simultaneously to the baffle 26, and upper and lower two cavity can be set up to be different length, and two can be the vertical portion of two and bottom plate two and two can realize the acoustic wave transmission channel, and the sound wave can realize the sound wave and the sound wave is reduced in the two and the two-frequency ranges that can realize the two and three-channel is different in the resonant cavity one and the resonant cavity one 24, and the two can realize the sound wave is different, and the sound wave can realize the sound wave is reduced in the sound wave is different, and the sound wave can realize the sound wave is reduced and the sound wave is the sound-absorbing effect is the sound has the sound.
The sound inlet pipe 10 and the sound outlet pipe 11 are fixed on the silencing frame 1 in an inserted structure, the sound inlet pipe/outlet pipe is a constant-section pipe, one end of the sound inlet pipe/outlet pipe is connected with a noise pipe, the other end of the sound inlet pipe is connected with the coiled cavity and extends into the coiled cavity to form an inner cannula structure, two sides of the sound inlet pipe 10 and the sound outlet pipe 11 are respectively and fixedly connected with a fixing plate 25, and a second resonant cavity 27 is reserved between the fixing plate 25 and the inner wall of the silencing frame 1.
When the sound wave enters the curled cavity through the sound inlet pipe 10, the forward sound wave is reflected by impedance mismatch caused by abrupt change of the cross section in the cavity, and the sound energy is dissipated, so that a sound-damping effect is formed, the second resonant cavity 27 is reserved between the fixing plate 25 and the inner wall of the sound-damping frame 1, and the second resonant cavity 27 can also enable the sound wave to repeatedly strike the cavity wall of the second resonant cavity 27 in the second resonant cavity 27, so that the sound energy is dissipated.
The materials used in the sound inlet pipe 10, the sound outlet pipe 11, the curled cavity 12, the first partition plate 13, the second partition plate 14, the extension plate 20, the first T-shaped plate 21, the second T-shaped plate 22 and the third T-shaped plate 23 are hard materials such as resin, plastic or metal, and the S-shaped channel 16, the first resonant cavity 24 and the second resonant cavity 27 are filled with porous sound absorbing materials, so that the sound absorbing effect on sound waves is enhanced, and the noise reducing effect is stronger.
The acoustic wave is guided into the curled cavity 12 through the acoustic pipe 10, impedance mismatch caused by abrupt change of the cross section in the cavity can lead the forward acoustic wave to be reflected and generate a dissipative effect on acoustic energy, so that a silencing effect is formed, the acoustic wave sequentially flows into the acoustic transmission channel between the extending plate 20 and the T-shaped plate 23 and the resonant cavity 24 between the vertical part of the T-shaped plate 21 and the vertical part of the T-shaped plate 22, the noise reduction capability of low-frequency noise can be greatly improved due to the fact that the S-shaped channel 16 effectively prolongs the propagation path of the acoustic wave, in the acoustic wave flowing process, the small hole array 15 is arranged on the surface of the first partition plate 13, the acoustic wave is caused to move back and forth at the two sides of the first partition plate 13 due to the acoustic pressure difference, the back and forth of the acoustic wave in the small holes, the back and forth vibration in the small holes also generates a dissipative effect on the acoustic energy, so that a silencing effect is formed, in addition, the acoustic wave sequentially flows into the acoustic transmission channel between the vertical part of the extending plate 20 and the T-shaped plate 23 and the vertical part of the T-shaped plate 21 and the resonant cavity 24, the acoustic wave can impact the acoustic wave in the resonant cavity 24 and the resonant cavity 24 in the vertical part of the T-shaped plate 21, the acoustic wave can further realize the silencing effect between the resonant cavity 24 and the resonant cavity 20 and the T-shaped plate and the resonant cavity, and the acoustic energy can be further improved in the acoustic energy transmission channel, and the acoustic energy can realize the acoustic noise reduction capability. The invention uses the curled cavity to replace the traditional straight-through cavity, so that the structure becomes lighter, thinner and simpler, overcomes the defects of narrow silencing frequency band, large structure volume, poor environmental adaptability and the like of the traditional pipeline silencing device, and is easy to be practically applied in different space and noise environments.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied to other applications without modification, as long as various insubstantial modifications of the inventive concept and technical solutions are adopted, all within the scope of the invention.

Claims (5)

1.一种基于卷曲腔体的宽频带消声结构，其特征在于：包括消声框架(1)、卷曲腔体(12)、进声管(10)、出声管(11)以及局部共振单元(2)，所述消声框架(1)的内部设有卷曲腔体(12)且所述卷曲腔体(12)的上、下两侧分别连通有所述进声管(10)和出声管(11)，所述卷曲腔体(12)内借助于分隔板一(13)和分隔板二(14)分隔形成供声音流动的S型通道(16)且所述S型通道(16)的部分转角处设有所述局部共振单元(2)，所述局部共振单元(2)通过腔体共振吸收卷曲腔体(12)中传播的噪音；1. A wide-band sound-absorbing structure based on a curled cavity, characterized in that it comprises a sound-absorbing frame (1), a curled cavity (12), a sound inlet pipe (10), a sound outlet pipe (11) and a local resonance unit (2), wherein the interior of the sound-absorbing frame (1) is provided with a curled cavity (12), and the upper and lower sides of the curled cavity (12) are respectively connected with the sound inlet pipe (10) and the sound outlet pipe (11), the curled cavity (12) is divided into an S-shaped channel (16) for sound flow by means of a partition plate 1 (13) and a partition plate 2 (14), and the local resonance unit (2) is provided at some corners of the S-shaped channel (16), and the local resonance unit (2) absorbs noise propagating in the curled cavity (12) through cavity resonance; 所述卷曲腔体(12)的两侧内壁均等间距分布有多个分隔板，分别为所述分隔板一(13)和所述分隔板二(14)，所述分隔板一(13)和所述分隔板二(14)呈间隔错位结构，每个所述分隔板一(13)和所述分隔板二(14)的端部与所述消声框架(1)的内壁之间留有声音传输通道以使所述卷曲腔体(12)的内部形成供声波传输的S型通道(16)，所述S型通道(16)的两端分别与所述进声管(10)和出声管(11)连通；Multiple partition plates are evenly spaced on the inner walls of both sides of the curled cavity (12), which are the partition plate one (13) and the partition plate two (14). The partition plate one (13) and the partition plate two (14) are in a staggered structure. A sound transmission channel is left between the end of each of the partition plates one (13) and the inner wall of the muffler frame (1) so that an S-shaped channel (16) for sound wave transmission is formed inside the curled cavity (12). The two ends of the S-shaped channel (16) are respectively connected to the sound inlet pipe (10) and the sound outlet pipe (11); 所述局部共振单元(2)包括延伸板(20)、T型板一(21)、T型板二(22)以及T型板三(23)，其中相邻的两个分隔板一(13)和分隔板二(14)的端部固定连接有延伸板(20)，所述T型板一(21)的竖直部的一侧与所述延伸板(20)相对且两者之间也留有声音传输通道，所述T型板一(21)的竖直部的另一侧分别设有所述T型板二(22)和T型板三(23)，所述T型板二(22)和T型板三(23)的竖直部与所述T型板一(21)的竖直部之间也留有声音传输通道，所述T型板一(21)、T型板二(22)以及T型板三(23)的水平部均与所述消声框架(1)的内壁固定连接，所述T型板二(22)和T型板三(23)的竖直部与所述消声框架(1)的内壁之间留有共振腔一(24)；The local resonance unit (2) comprises an extension plate (20), a T-shaped plate 1 (21), a T-shaped plate 2 (22) and a T-shaped plate 3 (23), wherein the ends of two adjacent partition plates 1 (13) and partition plates 2 (14) are fixedly connected with the extension plate (20), one side of the vertical portion of the T-shaped plate 1 (21) is opposite to the extension plate (20) and a sound transmission channel is also left between the two, and the other side of the vertical portion of the T-shaped plate 1 (21) is respectively provided with the T-shaped plate 2 (23). 2) and T-shaped plate three (23), a sound transmission channel is also reserved between the vertical parts of the T-shaped plate two (22) and the T-shaped plate three (23) and the vertical part of the T-shaped plate one (21), the horizontal parts of the T-shaped plate one (21), the T-shaped plate two (22) and the T-shaped plate three (23) are all fixedly connected to the inner wall of the muffler frame (1), and a resonance cavity one (24) is reserved between the vertical parts of the T-shaped plate two (22) and the T-shaped plate three (23) and the inner wall of the muffler frame (1); 所述T型板一(21)朝向所述T型板二以及T型板三(23)的一侧水平垂直固定连接有隔板(26)，所述隔板(26)与所述消声框架(1)的内壁固定连接且隔板(26)贯穿所述共振腔一(24)以将所述共振腔一(24)分隔为上、下两个腔体，上、下两个腔体的长度不同。A partition plate (26) is fixedly connected horizontally and vertically to one side of the T-shaped plate 1 (21) facing the T-shaped plate 2 and the T-shaped plate 3 (23); the partition plate (26) is fixedly connected to the inner wall of the muffler frame (1); and the partition plate (26) passes through the resonance cavity 1 (24) to separate the resonance cavity 1 (24) into an upper cavity and a lower cavity; the lengths of the upper cavity and the lower cavity are different. 2.根据权利要求1所述的一种基于卷曲腔体的宽频带消声结构，其特征在于：间隔分布的所述分隔板一(13)的表面均开设有小孔阵列(15)，所述小孔阵列(15)与所述S型通道(16)连通。2. According to claim 1, a wide-band sound-absorbing structure based on a curled cavity is characterized in that: the surface of the spaced-apart partition plate (13) is provided with a small hole array (15), and the small hole array (15) is connected to the S-shaped channel (16). 3.根据权利要求2所述的一种基于卷曲腔体的宽频带消声结构，其特征在于：所述卷曲腔体(12)的截面积是所述进声管(10)截面积以及所述出声管(11)截面积的5倍。3. According to claim 2, a wide-band sound-absorbing structure based on a curled cavity is characterized in that the cross-sectional area of the curled cavity (12) is 5 times the cross-sectional area of the sound inlet pipe (10) and the cross-sectional area of the sound outlet pipe (11). 4.根据权利要求1所述的一种基于卷曲腔体的宽频带消声结构，其特征在于：所述进声管(10)与所述出声管(11)均呈插入式结构固定在所述消声框架(1)上，所述进声管(10)与所述出声管(11)的两侧分别固定连接有固定板(25)，所述固定板(25)与所述消声框架(1)的内壁之间留有共振腔二(27)。4. According to claim 1, a wide-band silencer structure based on a curled cavity is characterized in that: the sound inlet pipe (10) and the sound outlet pipe (11) are both fixed on the silencer frame (1) in an inserted structure, and the two sides of the sound inlet pipe (10) and the sound outlet pipe (11) are respectively fixedly connected with a fixing plate (25), and a resonance cavity 2 (27) is left between the fixing plate (25) and the inner wall of the silencer frame (1). 5.根据权利要求1所述的一种基于卷曲腔体的宽频带消声结构，其特征在于：所述进声管(10)、出声管(11)、卷曲腔体(12)、分隔板一(13)和分隔板二(14)、延伸板(20)、T型板一(21)、T型板二(22)以及T型板三(23)所用材质为树脂、塑料或金属硬性材料，所述S型通道(16)、共振腔一(24)以及共振腔二(27)内填充有多孔吸声材料。5. A wide-band sound-absorbing structure based on a curled cavity according to claim 1, characterized in that: the sound inlet pipe (10), the sound outlet pipe (11), the curled cavity (12), the partition plate 1 (13) and the partition plate 2 (14), the extension plate (20), the T-shaped plate 1 (21), the T-shaped plate 2 (22) and the T-shaped plate 3 (23) are made of resin, plastic or metal hard material, and the S-shaped channel (16), the resonance cavity 1 (24) and the resonance cavity 2 (27) are filled with porous sound-absorbing material.
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CN104612941A (en) * 2015-02-14 2015-05-13 浙江鸿友压缩机制造有限公司 Compressor intake silencer based on multi-level tube attenuation unit
CN115493017A (en) * 2022-09-09 2022-12-20 开化县钱江源高端装备研究院 A Ventilation Duct Muffler Based on a Coiled Helmholtz Resonator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104612941A (en) * 2015-02-14 2015-05-13 浙江鸿友压缩机制造有限公司 Compressor intake silencer based on multi-level tube attenuation unit
CN115493017A (en) * 2022-09-09 2022-12-20 开化县钱江源高端装备研究院 A Ventilation Duct Muffler Based on a Coiled Helmholtz Resonator

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