Silencing assembly and silencing device

Abstract

According to the silencing assembly and the silencing device, the silencing assembly comprises a silencing pipe and a separation structure, the silencing pipe is provided with a pipe cavity, and the silencing pipe is provided with a plurality of silencing holes penetrating through the pipe cavity; the separation structure is contained in the pipe cavity and connected with the inner wall face of the silencing pipe, and the pipe cavity is divided into a plurality of resonant cavities by the separation structure and the inner wall face of the silencing pipe. The silencing assembly is simple in structure and good in environmental protection performance.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, in particular to a muffler component and a muffler device. Background Art

[0002] A muffler is an airflow duct with a sound-absorbing lining or a special structure that can effectively reduce noise. In noise control technology, the muffler is the most widely used noise reduction device.

[0003] The existing silencer bends the perforated plate into a column, fills it with sound-absorbing material, wraps it with glass cloth, and then adds an outer frame, brackets, etc., and assembles them at a certain distance to form a silencer. The principle is to use porous materials to absorb sound energy to achieve noise reduction effects. Sound-absorbing materials are generally fibrous materials, usually organic fiber materials, linen cotton felt, inorganic fiber materials, glass wool, rock wool, mineral wool, etc. However, fiber-type sound-absorbing materials will float into the air after aging, and their environmental performance is poor. In addition, the existing silencer has a complex structure. Utility Model Content

[0004] The utility model aims to provide a muffler assembly and a muffler device to solve the problems of complex structure and poor environmental performance of the muffler.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a muffler assembly, comprising:

[0007] A muffler pipe having a lumen, wherein the muffler pipe is provided with a plurality of muffler holes penetrating the lumen;

[0008] The partition structure is accommodated in the tube cavity and connected to the inner wall surface of the muffler tube. The partition structure and the inner wall surface of the muffler tube divide the tube cavity into a plurality of resonance cavities.

[0009] In one embodiment, the perforation rate of a region of the muffler pipe corresponding to at least one of the resonance cavities is different from the perforation rate of a region of the muffler pipe corresponding to other resonance cavities.

[0010] In one embodiment, the aperture of the silencer hole is d, satisfying: d≤1mm; and / or, the perforation rate of the silencer pipe is p, satisfying: 0.1%≤p≤3%; and / or, the diameter of the silencer pipe is N, satisfying: 50mm≤N≤300mm; and / or, the wall thickness of the silencer pipe is t, satisfying: 1mm≤t≤3mm.

[0011] In one embodiment, the partition structure includes a plurality of first partitions and a plurality of second partitions, wherein the plurality of first partitions are spaced apart in the axial direction of the muffler, and a second partition is disposed between two adjacent first partitions.

[0012] In one embodiment, the inner wall surface of the silencer pipe is provided with a reinforcing rib extending in the axial direction, and the reinforcing rib is provided with a guide groove extending in the axial direction, and a portion of the first baffle extends into the guide groove to fix the first baffle and the silencer pipe in the circumferential direction, and / or a portion of the second baffle extends into the guide groove to fix the second baffle and the silencer pipe in the circumferential direction.

[0013] In one embodiment, two receiving grooves are provided on the outer periphery of the first partition plate, the two receiving grooves are separated by a protrusion, the reinforcing ribs extend into the receiving grooves, and the protrusions extend into the guide grooves.

[0014] In one embodiment, the reinforcing ribs are multiple and are evenly spaced in the circumferential direction of the muffler pipe, each of the reinforcing ribs is provided with the guide groove, and the second partition plate includes multiple sub-plates, one ends of the multiple sub-plates are interconnected, and the multiple sub-plates are rotationally symmetrically distributed along the axis of the muffler pipe, and the multiple sub-plates extend into the guide groove one by one.

[0015] In one embodiment, an air guide cap is further included, and the air guide cap is provided at at least one end of the muffler pipe along the axial direction.

[0016] In one embodiment, it further comprises a mounting rod, wherein the mounting rod penetrates the partition structure and the air guide cap along the axial direction of the muffler pipe, and is used to fix the muffler assembly as a whole to an external structure.

[0017] In a second aspect, the utility model provides a muffler, comprising:

[0018] A housing having a receiving cavity;

[0019] As described in the first aspect, the silencer assembly is accommodated in the accommodating cavity.

[0020] In one embodiment, it further includes a first connecting rod, which is connected to the shell, and one end of the muffler assembly is connected to the first connecting rod.

[0021] In one embodiment, the invention further comprises a second connecting rod, wherein the second connecting rod is connected to the shell, and an end of the muffler assembly away from the first connecting rod is connected to the second connecting rod.

[0022] In one embodiment, along the axial direction of the muffler pipe, both ends of the accommodating cavity have openings, and a plurality of the muffler components are arranged in an array in the accommodating cavity.

[0023] In one embodiment, the diameter of the silencer pipe of the silencer assembly is N, and the distance between two adjacent silencer assemblies is Y, satisfying: 1.5N≤Y≤3N.

[0024] In the silencer assembly of the utility model, the silencer pipe and the partition structure together form a resonance cavity. The incident sound wave enters the resonance cavity from the silencer hole. The incident sound wave can cause the air column in the resonance cavity to vibrate violently, while overcoming the friction resistance of the hole wall and consuming sound energy to achieve the noise reduction effect. The silencer assembly of the utility model is a purely mechanical structure, does not require the use of fiber-type sound-absorbing materials, has a simple structure, good environmental protection performance, and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a perspective view of a muffler assembly according to an embodiment;

[0027] Figure 2 is a front view of a muffler assembly according to an embodiment;

[0028] Figure 3 is a three-dimensional diagram of a partition structure of an embodiment;

[0029] Figure 4 is a stereoscopic view of a muffler pipe according to an embodiment;

[0030] Figure 5 yes Figure 4 A partial enlarged view of the middle Z;

[0031] Figure 6 is a perspective view of a first baffle of an embodiment;

[0032] Figure 7 is a perspective view of a second baffle of an embodiment;

[0033] Figure 8 is a three-dimensional diagram of an air guide cap according to an embodiment;

[0034] Fig. 9 is a three-dimensional diagram of a partial structure of a muffler device according to an embodiment;

[0035] Fig.10 is a perspective view of a muffler device according to an embodiment;

[0036] Fig.11 is a top view of a muffler device according to an embodiment;

[0037] Fig.12 is a cross-sectional view of a muffler device according to an embodiment;

[0038] Fig.13 It is a simulation curve of the low-frequency noise transmission loss of the silencer component;

[0039] Fig.14 It is a simulation curve of the low-frequency noise transmission loss of the silencer component.

[0040] Description of reference numerals:

[0041] 100-silencer, 10-silencer assembly, 11-silencer pipe, 112-tube cavity, 113-silencer hole, 114-reinforcement rib, 115-guide groove;

[0042] 12-partition structure, 121-first partition, 1211-accommodating groove, 1212-protrusion, 1213-through hole, 122-second partition, 1221-sub-plate, 1222-through hole, 123-resonance cavity;

[0043] 14-air guide cap, 141-mounting hole, 142-rib position, 15-mounting rod, 16-nut;

[0044] 20 - housing, 21 - accommodating chamber, 30 - first connecting rod, 40 - second connecting rod. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0047] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0048] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0049] refer to Figure 1-Figure 3 The utility model provides a muffler assembly 10, including a muffler pipe 11 and a partition structure 12. The muffler pipe 11 has a tube cavity 112, and the muffler pipe 11 is provided with a plurality of muffler holes 113 penetrating the tube cavity 112. The partition structure 12 is accommodated in the tube cavity 112 and connected to the inner wall surface of the muffler pipe 11. The partition structure 12 and the inner wall surface of the muffler pipe 11 divide the tube cavity 112 into a plurality of resonance cavities 123.

[0050] The muffler pipe 11 and the partition structure 12 are lightweight materials with high-strength structures, specifically high-strength plastics, aluminum, galvanized steel plates, stainless steel, fiberglass, etc., without limitation. The muffler assembly 10 using sound-absorbing materials needs to wrap the fiber material with a perforated metal material, and the product has a large self-weight and high requirements for the bearing structure. The muffler assembly 10 of the utility model is light in weight and easy to install.

[0051] The cross section of the muffler 11 can be circular, rectangular, diamond-shaped, etc. without limitation.

[0052] The shape of the muffler hole 113 can be circular, rectangular, diamond-shaped, etc., without limitation.

[0053] The muffler pipe 11 may be prepared by extrusion molding, and the muffler hole 113 may be formed by automatic drilling by a CNC machine tool.

[0054] In the silencer assembly 10 of the utility model, the silencer pipe 11 and the partition structure 12 together form a resonance cavity 123, and the incident sound wave enters the resonance cavity 123 from the silencer hole 113. The incident sound wave can cause the air column in the resonance cavity 123 to vibrate violently, while overcoming the friction resistance of the hole wall and consuming sound energy to achieve the noise reduction effect. The silencer assembly 10 of the utility model is a purely mechanical structure with a simple structure. It does not require the use of fiber-type sound-absorbing materials, has good environmental protection performance, and has a long service life. The silencer assembly 10 of the utility model does not contain sound-absorbing materials, and does not need to consider the effects of waterproofing and dustproofing. It has a wide range of application scenarios and can be used on rainy days and outdoors.

[0055] refer to Figure 3 and Figure 4In one embodiment, the perforation rate of a region of the muffler 11 corresponding to at least one resonance cavity 123 is different from the perforation rate of a region of the muffler 11 corresponding to other resonance cavities 123 .

[0056] The perforation rate refers to the ratio of the total opening area of ​​all the muffler holes 113 on the muffler pipe 11 corresponding to a resonance cavity 123 to the total pipe body area of ​​the corresponding muffler pipe 11 .

[0057] The perforation rates of the multiple regions of the muffler 11 corresponding to the multiple resonance cavities 123 may be partially the same.

[0058] The perforation rates of the multiple regions of the muffler 11 corresponding to the multiple resonance cavities 123 may be completely different.

[0059] The perforation rates of multiple regions of the muffler 11 corresponding to the multiple resonance cavities 123 in the axial direction may be the same or different, without limitation.

[0060] The perforation rates of multiple regions of the muffler 11 corresponding to the multiple resonance cavities 123 in the circumferential direction may be the same or different, without limitation.

[0061] When the incident sound wave frequency is equal to the system natural frequency, it will cause the air column in the hole neck to vibrate violently, and consume sound energy to achieve noise reduction due to overcoming the friction resistance of the hole wall. The system natural frequency is related to the geometric parameters of the perforated plate (average hole diameter (d), hole spacing (b), tube wall thickness (t), back cavity thickness (D), perforation rate (p), etc.), and its sound absorption coefficient can be calculated by the following formula

[0062] in,

[0063] According to the above formula, the structure can be designed to construct sound absorbing monomers of different frequency bands. In order to reduce the cost, the utility model only adjusts the perforation rate (p). By utilizing the mutual coupling of multiple resonance cavities 123, the broadband sound absorption effect of the muffler assembly 10 can be achieved.

[0064] Table 1 shows the relevant parameters of the muffler.

[0065] Table 1

[0066]

[0067] Fig.13 It is a simulation curve diagram of low-frequency noise transmission loss of a single silencer assembly 10 (silencer assembly A, silencer assembly B, silencer assembly C) and a coupled silencer assembly 10, Fig.14 The following is a simulation curve diagram of low-frequency noise transmission loss of a single muffler assembly 10 (muffler assembly D, muffler assembly E, and muffler assembly F) and a coupled muffler assembly 10. Fig.13and Fig.14 It can be seen that when only the perforation rate p is changed, the frequency of the noise absorbed by a single muffler assembly 10 is different, and the perforation rates of multiple regions of the muffler tube 11 corresponding to the coupled muffler assembly 10, i.e., multiple resonance cavities 123, are different. The frequency of the noise absorbed by the coupled muffler assembly 10 is significantly widened, and broadband noise control is achieved. Using muffler assemblies 10 with different designs can absorb noise in different frequency bands, and coupling muffler assemblies 10 with different monomers can achieve flexible control of different noises.

[0068] In one embodiment, the aperture of the silencer hole 113 is d, satisfying: d≤1mm; and / or, the perforation rate of the silencer pipe 11 is p, satisfying: 0.1%≤p≤3%; and / or, the tube diameter of the silencer pipe 11 is N, satisfying: 50mm≤N≤300mm; and / or, the tube wall thickness of the silencer pipe 11 is t, satisfying: 1mm≤t≤3mm.

[0069] The aperture d can be 0.1mm, 0.3mm, 0.5mm, 1mm, without limitation. When d is too small, such as d<0.1mm, the processing is difficult; when d>1mm, the aperture of the muffler hole 113 is too large to cause the vibration of the air column in the resonance cavity 123, resulting in poor muffler effect.

[0070] The perforation rate p can be 0.1%, 0.5%, 1%, 2%, 3%, without limitation. When p < 0.1%, the corresponding sound wave frequency absorbed is too small, beyond the sound wave range that humans can accept, and the absorption is of little significance; when p > 3%, the corresponding sound wave frequency absorbed is too large, beyond the sound wave range that humans can accept, and the absorption is of little significance.

[0071] The silencer pipe 11 is in the shape of a circular tube, and the pipe diameter N is the inner diameter of the silencer pipe 11; the pipe diameter N can be 100mm≤N≤250mm, 150mm≤N≤200mm, and specifically can be 50mm, 100mm, 200mm, 250mm, 300mm, without limitation. When N<50mm, the volume of the silencer pipe 11 is too small, and the processing is difficult; when N>300mm, the volume of the resonance cavity 123 is too large, and the vibration effect of the air column in the resonance cavity 123 is weakened, and the silencer effect is poor.

[0072] The wall thickness t can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, without limitation. When t<1mm, the strength of the muffler pipe 11 is too low, the resistance to cooling wind and natural wind is weak, and the structural stability of the muffler assembly 10 is poor; when t>3mm, the wall of the muffler pipe 11 is too thick, the vibration effect of the air column in the resonance cavity 123 is poor, and the muffler effect is poor.

[0073] By designing and controlling the average pore size d, perforation rate p, tube diameter N and tube wall thickness t, the sound attenuation effect can be achieved for sound waves in different frequency bands.

[0074] refer to Figure 3 In one embodiment, the partition structure 12 includes a plurality of first partitions 121 and a plurality of second partitions 122 . The plurality of first partitions 121 are spaced apart in the axial direction of the muffler 11 , and a second partition 122 is disposed between two adjacent first partitions 121 .

[0075] The first separator 121 may be prepared by CNC machining; the second separator 122 may be prepared by extrusion molding.

[0076] The first partition plate 121 divides the tube cavity 112 in the axial direction, and the second partition plate 122 divides the tube cavity 112 in the circumferential direction, dividing the tube cavity 112 into multiple resonance cavities 123. The perforation rates of multiple areas of the silencer 11 corresponding to the resonance cavities 123 are designed to achieve good sound absorption effects for noises of different frequencies.

[0077] refer to Figure 4 and Figure 5 In one embodiment, the inner wall surface of the silencer 11 is provided with a reinforcing rib 114 extending in the axial direction, and the reinforcing rib 114 is provided with a guide groove 115 extending in the axial direction, and a portion of the first baffle 121 extends into the guide groove 115 to fix the first baffle 121 and the silencer 11 in the circumferential direction, and / or a portion of the second baffle 122 extends into the guide groove 115 to fix the second baffle 122 and the silencer 11 in the circumferential direction.

[0078] The reinforcing ribs 114 can enhance the axial strength of the muffler 11 , and the guide grooves 115 can fix the partition structure 12 in the circumferential direction.

[0079] refer to Figure 6 In one embodiment, two receiving grooves 1211 are provided on the outer periphery of the first partition plate 121 , the two receiving grooves 1211 are separated by a protrusion 1212 , the reinforcing rib 114 extends into the receiving groove 1211 , and the protrusion 1212 extends into the guide groove 115 .

[0080] A through hole 1213 penetrating along the axial direction is formed at the geometric center of the first partition plate 121 to facilitate subsequent installation.

[0081] The two second separators 122 adjacent to the first separator 121 are aligned with the protrusions 1212 on the first separator 121 in the axial direction.

[0082] The receiving groove 1211 receives the reinforcing rib 114 , and the protrusion 1212 extends into the guide groove 115 , which can fix the first partition plate 121 in the circumferential direction.

[0083] refer to Figure 5-Figure 7In one embodiment, there are multiple reinforcing ribs 114 and they are evenly spaced around the circumference of the muffler 11. Each reinforcing rib 114 is provided with a guide groove 115. The second partition plate 122 includes multiple sub-plates 1221. One ends of the multiple sub-plates 1221 are connected to each other, and the multiple sub-plates 1221 are rotationally symmetrically distributed along the axis of the muffler 11. The multiple sub-plates 1221 extend into the guide groove 115 one by one.

[0084] The plurality of sub-plates 1221 are smoothly connected at the connection, and a through hole 1222 penetrating the sub-plate 1221 in the axial direction is provided at the connection.

[0085] The sub-plates 1221 are arranged in one-to-one correspondence with the guide grooves 115 , and can fix the second partition plate 122 in the circumferential direction.

[0086] refer to Figure 1 and Figure 8 In one embodiment, the silencer assembly 10 further includes an air guide cap 14 and a mounting rod 15 , and an air guide cap 14 is provided at each end of the silencer pipe 11 ; the mounting rod 15 penetrates the partition structure 12 and the air guide cap 14 along the axial direction of the silencer pipe 11 .

[0087] The air guide cap 14 may be prepared by injection molding.

[0088] A mounting hole 141 is provided at the geometric center of the air guide cap 14 , and the mounting hole 141 is used for sleeve mounting of the mounting rod 15 .

[0089] The air guide cap 14 is provided with a plurality of ribs 142 , one ends of which are connected to each other, the plurality of ribs 142 are rotationally symmetrically distributed along the axis of the muffler 11 , and the plurality of ribs 142 are provided corresponding to the sub-plates 1221 of the second partition plate 122 .

[0090] The mounting rod 15 may be made of high-strength metal, specifically aluminum alloy, stainless steel, etc., without limitation.

[0091] The diameter of the mounting rod 15 is φ, which satisfies 6 mm ≤ φ ≤ 10 mm, and can be 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm without limitation.

[0092] The air guide cap 14 is used to close the muffler pipe 11 and reduce air flow resistance, and the mounting rod 15 is used to fix the partition structure 12 in the axial direction.

[0093] refer to Figure 1 In one embodiment, the silencer assembly 10 further includes a nut 16, and a nut 16 is provided at each end of the mounting rod 15. Both ends of the mounting rod 15 are provided with threads, and the nut 16 abuts against one end of the air guide cap 14 away from the silencer pipe 11, and is used to fix the air guide cap 14, the silencer pipe 11 and the partition structure 12 in the axial direction of the silencer pipe 11.

[0094] refer to Figure 9-12 The utility model provides a muffler device 100, comprising a housing 20 and a muffler assembly 10 as described in any of the above embodiments. The housing 20 is provided with a receiving cavity 21, and the muffler assembly 10 is received in the receiving cavity 21.

[0095] In one embodiment, the muffler 100 further includes a first connecting rod 30 and a second connecting rod 40. The first connecting rod 30 is connected to the housing 20, and one end of the muffler assembly 10 is connected to the first connecting rod 30. The second connecting rod 40 is connected to the housing 20, and one end of the muffler assembly 10 away from the first connecting rod 30 is connected to the second connecting rod 40.

[0096] The shell 20 is a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. Metal materials such as aluminum, aluminum alloys, magnesium alloys, iron and iron alloys, etc. The shell 20 can be an integrated structure, that is, the bottom plate and the side plates are an integrated structure made by an integrated molding process, and the integrated molding process can be specifically stamping, casting, etc., without limitation. The shell 20 can also be a split structure, and the side plate and the bottom plate can be connected and fixed by welding, bonding, clamping, screwing, etc. The wall thickness of the shell 20 can be roughly uniform everywhere, that is, the thickness of the side plate can be roughly uniform, and the thickness of the bottom plate and the side plate can also be roughly the same. The opening of the accommodating cavity 21 is located at the top of the shell 20.

[0097] There can be a plurality of first connecting rods 30 and second connecting rods 40 , which are arranged correspondingly.

[0098] The mounting rod 15 is connected to the first connecting rod 30 , and one end of the mounting rod 15 away from the first connecting rod 30 is connected to the second connecting rod 40 .

[0099] The connection method between the mounting rod 15 and the first connecting rod 30 and the second connecting rod 40 can be threaded connection, clamped connection, etc., without limitation.

[0100] The first connecting rod 30 and the second connecting rod 40 can be connected to the housing 20 by bonding, clamping or welding, without limitation.

[0101] There can be multiple silencer components 10, and the perforation rates of the multiple silencer components 10 can be the same or different, without limitation.

[0102] The pipe diameters of the multiple silencer assemblies 10 may be the same or different without limitation.

[0103] The muffler device 100 is provided with a muffler assembly 10, and the muffler pipe 11 and the partition structure 12 together form a resonance cavity 123. The incident sound wave enters the resonance cavity 123 from the muffler hole 113, and the incident sound wave can cause the air column in the resonance cavity 123 to vibrate violently, while overcoming the friction resistance of the hole wall, and consuming sound energy to achieve a noise reduction effect. The muffler assembly 10 of the utility model is a purely mechanical structure, and has a simple structure, does not need to use fiber-type sound-absorbing materials, has good environmental protection performance, and has a long service life.

[0104] refer to Figure 10-12 In one embodiment, along the axial direction of the silencer pipe 11 , both ends of the accommodating cavity 21 have openings, and a plurality of silencer assemblies 10 are arranged in an array in the accommodating cavity 21 .

[0105] The plurality of first connecting rods 30 are parallel to each other, and the plurality of muffler assemblies 10 disposed on the first connecting rods 30 are arranged at equal intervals.

[0106] In one implementation, the diameter of the silencer pipe 11 of the silencer assembly 10 is N, and the distance between two adjacent silencer assemblies 10 is Y, satisfying: 1.5N≤Y≤3N.

[0107] The spacing Y can be 1.5N, 2N, 2.5N, 3N without limitation, and the pipe diameter N satisfies 50mm≤N≤300mm. When Y<1.5N, the spacing between two adjacent silencer assemblies 10 is too small, the projection area of ​​the silencer assemblies 10 occupies a large area of ​​the ventilation area, and the weight of the silencer 100 is large; when Y>3N, the spacing between two adjacent silencer assemblies 10 is too large, the projection area of ​​the silencer assemblies 10 occupies a small area of ​​the ventilation area, and space is wasted. When 1.5N≤Y≤3N, it is beneficial to reduce the size and weight of the silencer 100 while ensuring the net ventilation area.

[0108] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0109] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A sound-absorbing component, It is characterized in that include: A muffler pipe having a lumen, wherein the muffler pipe is provided with a plurality of muffler holes penetrating the lumen; The partition structure is accommodated in the tube cavity and connected to the inner wall surface of the muffler tube. The partition structure and the inner wall surface of the muffler tube divide the tube cavity into a plurality of resonance cavities.

2. The sound-absorbing assembly according to claim 1, It is characterized in that The perforation rate of a region of the muffler pipe corresponding to at least one of the resonance cavities is different from the perforation rate of a region of the muffler pipe corresponding to other resonance cavities.

3. The sound-absorbing assembly according to claim 1, It is characterized in that The aperture of the silencer hole is d, satisfying: d≤1mm; and / or, the perforation rate of the silencer pipe is p, satisfying: 0.1%≤p≤3%; and / or, the diameter of the silencer pipe is N, satisfying: 50mm≤N≤300mm; and / or, the wall thickness of the silencer pipe is t, satisfying: 1mm≤t≤3mm.

4. The sound-absorbing assembly according to claim 1, It is characterized in that The partition structure includes a plurality of first partitions and a plurality of second partitions. The plurality of first partitions are arranged at intervals in the axial direction of the muffler, and a second partition is arranged between two adjacent first partitions.

5. The sound-absorbing assembly according to claim 4, It is characterized in that The inner wall surface of the silencer pipe is provided with reinforcing ribs extending along the axial direction, and the reinforcing ribs are provided with guide grooves extending along the axial direction, and part of the first baffle extends into the guide groove to fix the first baffle and the silencer pipe in the circumferential direction, and / or part of the second baffle extends into the guide groove to fix the second baffle and the silencer pipe in the circumferential direction.

6. The sound-absorbing assembly according to claim 5, It is characterized in that Two receiving grooves are arranged on the outer periphery of the first partition plate. The two receiving grooves are separated by a protrusion. The reinforcing ribs extend into the receiving grooves, and the protrusions extend into the guide grooves.

7. The sound-absorbing assembly according to claim 5, It is characterized in that There are multiple reinforcing ribs which are evenly spaced in the circumferential direction of the muffler pipe, each of the reinforcing ribs is provided with the guide groove, the second partition plate includes multiple sub-plates, one ends of the multiple sub-plates are interconnected, and the multiple sub-plates are rotationally symmetrically distributed along the axis of the muffler pipe, and the multiple sub-plates extend into the guide groove one by one.

8. The sound-absorbing assembly according to claim 1, It is characterized in that It also includes an air guide cap, and the air guide cap is provided at at least one end of the muffler pipe along the axial direction.

9. The sound-absorbing assembly according to claim 8, It is characterized in that It also includes a mounting rod, which passes through the partition structure and the air guide cap along the axial direction of the muffler pipe and is used to fix the muffler assembly as a whole to the external structure.

10. A muffler, It is characterized in that include: A housing having a receiving cavity; The silencer assembly according to any one of claims 1 to 9, wherein the silencer assembly is accommodated in a receiving cavity. 11 . The muffler device according to claim 10 , further comprising a first connecting rod, wherein the first connecting rod is connected to the housing, and one end of the muffler assembly is connected to the first connecting rod. 12 . The muffler device according to claim 11 , further comprising a second connecting rod, wherein the second connecting rod is connected to the housing, and an end of the muffler assembly away from the first connecting rod is connected to the second connecting rod.

13. The noise reduction device according to claim 10, It is characterized in that Along the axial direction of the muffler pipe, both ends of the accommodating cavity have openings, and a plurality of the muffler components are arranged in an array in the accommodating cavity.

14. The noise reduction device according to claim 13, It is characterized in that The diameter of the silencer pipe of the silencer assembly is N, and the distance between two adjacent silencer assemblies is Y, satisfying: 1.5N≤Y≤3N.

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