Silencing structure and silencer thereof

Abstract

The utility model belongs to the technical field of diesel engine silencers, and particularly relates to a silencing structure and a silencer thereof. The device comprises a plurality of silencing cavities which are communicated in sequence; a cavity separating baffle is arranged between every two adjacent silencing cavities. And when the air flow sequentially passes through the silencing cavities, the cavity separation baffles absorb noise in the air flow. The cavity separation baffles are arranged among the silencing cavities to block noise and guide airflow to move, so that the noise reduction effect is achieved, and exhaust is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engine mufflers, and particularly relates to a silencing structure and a muffler thereof. Background Art

[0002] In existing diesel engines, the noise in the medium and high frequency bands is relatively large, which affects the use comfort of users.

[0003] Therefore, it is necessary to design a silencing structure and a muffler thereof to solve the problem of relatively large noise in the medium and high frequency bands of diesel engines

[0004] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute the prior art. Summary of the Utility Model

[0005] The embodiments of the present disclosure at least provide a silencing structure and a muffler thereof.

[0006] In a first aspect, the embodiments of the present disclosure provide a silencing structure, including: a plurality of silencing cavities connected in sequence;

[0007] There is a partition cavity baffle between two adjacent silencing cavities;

[0008] Moreover, when the air flow passes through each silencing cavity in sequence, the partition cavity baffle absorbs the noise in the air flow.

[0009] In an optional embodiment, the partition cavity baffle is internally provided with sound-absorbing material.

[0010] In an optional embodiment, a plurality of ventilation pipes are inserted through at least one of the partition cavity baffles;

[0011] A plurality of sound-absorbing holes are formed in the side wall of the ventilation pipe.

[0012] In an optional embodiment, a plurality of sound-absorbing pipes are inserted through at least one of the partition cavity baffles;

[0013] A plurality of flow holes are formed in the sound-absorbing pipe.

[0014] In an optional embodiment, a plurality of partition cavity baffles are arranged in sequence along the air flow direction;

[0015] At least one through diameter is provided on the partition cavity baffle.

[0016] In an optional embodiment, the partition cavity baffle is internally provided with sound-absorbing material.

[0017] In a second aspect, an embodiment of the present disclosure further provides a muffler, including the sound-absorbing structure as described above. The muffler further includes: a housing, and the sound-absorbing structure is installed in the housing.

[0018] In an alternative embodiment, an intake pipe and an exhaust pipe are respectively inserted through two ends of the housing;

[0019] A plurality of intake holes are formed in the intake pipe;

[0020] A plurality of exhaust holes are formed in the exhaust pipe.

[0021] In an alternative embodiment, the side wall of the housing close to the intake pipe is provided with sound-absorbing material.

[0022] In an alternative embodiment, the end wall of the housing close to the exhaust pipe is provided with sound-absorbing material.

[0023] The beneficial effect of the present utility model is that by arranging partition baffles between a plurality of sound-absorbing cavities, noise is blocked and the airflow movement is guided, thereby achieving the noise reduction effect and exhausting gas.

[0024] Other features and advantages of the present utility model will be described in the following specification, and partly will become obvious from the specification, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the specification, claims and drawings.

[0025] To make the above objectives, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the attached drawings, the detailed description is as follows. Description of the Drawings

[0026] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 A perspective view of a muffler provided by an embodiment of the present disclosure;

[0028] Figure 2 A structural schematic diagram of a sound-absorbing structure provided by an embodiment of the present disclosure;

[0029] Figure 3 A cross-sectional view of a muffler provided by an embodiment of the present disclosure.

[0030] In the figure:

[0031] 1. Sound absorption cavity;

[0032] 2. Partition cavity baffle; 21. Vent pipe; 22. Sound absorption holes; 23. Sound absorption pipes; 24. Flow holes;

[0033] 3. Sound absorption material;

[0034] 4. Housing; 41. Intake pipe; 411. Intake holes; 42. Exhaust pipe; 421. Exhaust holes. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] First part:

[0037] It has been found through research that in existing diesel engines, the noise in the medium and high frequency bands is relatively large, which affects the user's comfort during use.

[0038] All the defects existing in the above solutions are the results obtained by the inventor through practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by the present disclosure for the above problems should be the contributions made by the inventor during the process of the present disclosure.

[0039] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. In addition, in the accompanying drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] Based on the above research, with reference to Figure 2 , the embodiments of the present disclosure provide a sound absorption structure, including: a plurality of sound absorption cavities 1, a partition cavity baffle 2 is provided between two adjacent sound absorption cavities 1, and the partition cavity baffle 2 has a through diameter so that each sound absorption cavity 1 is communicated, and the air flow can circulate between each sound absorption cavity 1. When the air flow passes through the partition cavity baffle 2, the partition cavity baffle 2 can absorb the noise in the air flow, thereby achieving the effect of sound absorption and noise reduction.

[0042] Reference Figure 3 In at least one embodiment, the internal of the partition baffle 2 is provided with sound-absorbing material 3. When the air flow passes through the partition baffle 2, the sound-absorbing material 3 absorbs the noise in the air flow, thereby achieving the effect of sound absorption and noise reduction.

[0043] Reference Figure 3 In at least one embodiment, a plurality of air pipes 21 are inserted through at least one of the partition baffles 2 to form a through-path and connect adjacent partition baffles 2. Further, a plurality of sound-absorbing holes 22 are formed in the side wall of the air pipe 21, so that when the air flow passes through the air pipe 21, it contacts the sound-absorbing material 3 through the sound-absorbing holes 22, so that the sound-absorbing material 3 absorbs the noise in the air flow.

[0044] Reference Figure 3 In at least one embodiment, a plurality of sound-absorbing pipes 23 are inserted through at least one of the partition baffles 2 to form a through-path and connect adjacent partition baffles 2. Further, a plurality of flow holes 24 are formed in the sound-absorbing pipe 23. The air flow can enter the interior of the sound-absorbing pipe 23 through the flow holes 24 and pass through the partition baffle 2 along the sound-absorbing pipe 23. When passing through the partition baffle 2, it can contact the sound-absorbing material 3 through the flow holes 24, so that the sound-absorbing material 3 absorbs the noise in the air flow.

[0045] The embodiment of the present disclosure further provides a muffler, including the sound-absorbing structure as described above. Reference Figure 1 The muffler further includes: a housing 4, and the sound-absorbing structure is installed in the housing 4. In addition, reference Figure 2 The two ends of the housing 4 are respectively inserted with an air inlet pipe 41 and an exhaust pipe 42. A plurality of air inlet holes 411 are formed in the air inlet pipe 41, and a plurality of exhaust holes 421 are formed in the exhaust pipe 42. The air flow can be introduced into the housing 4 through the air inlet pipe 41 and enter the first sound-absorbing cavity 1 through the air inlet holes 411. After the air flow passes through each partition baffle 2 in sequence and enters the last sound-absorbing cavity 1, it enters the exhaust pipe 42 through the exhaust holes 421, and then is discharged from the housing 4 through the exhaust pipe 42, thus completing the complete process of air intake and exhaust.

[0046] Reference Figure 3, in at least one embodiment, in order to further enhance the sound attenuation efficiency of the muffler, the side wall of the housing 4 close to the intake pipe 41 is provided with a sound-absorbing material 3. At the same time, the end wall of the housing 4 close to the exhaust pipe 42 is provided with a sound-absorbing material 3. That is, when the air flow enters the first sound attenuation chamber 1 through the intake hole 411, the gas diffuses radially to contact the sound-absorbing material 3, thereby forming primary sound absorption. Then the gas enters the ventilation pipe 21 and contacts the sound-absorbing material 3 through the sound attenuation holes 22 for secondary sound absorption. Then, the gas enters the sound attenuation pipe 23 and contacts the sound-absorbing material 3 through the circulation holes 24 for tertiary sound absorption. When the gas continues to flow backward to reach the last sound attenuation chamber 1, the air flow impacts the end wall of the last sound attenuation chamber 1 to complete the last sound absorption. Finally, the gas rebounds and enters the exhaust pipe 42 to complete the exhaust.

[0047] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Taking the above-described ideal embodiments of the present invention as an inspiration, through the above description, relevant workers can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. An anechoic structure, characterized in that, Comprising: A number of sound-absorbing cavities (1) connected in sequence; There is a partition baffle (2) between two adjacent sound-absorbing cavities (1); And when the air flow passes through each sound-absorbing cavity (1) in sequence, the partition baffle (2) absorbs the noise in the air flow.

2. The sound-absorbing structure according to claim 1, characterized in that The partition baffle (2) is internally provided with sound-absorbing material (3).

3. The sound-absorbing structure according to claim 1, characterized in that A number of ventilation pipes (21) are inserted through at least one partition baffle (2); A number of sound-absorbing holes (22) are provided on the side wall of the ventilation pipe (21).

4. The sound-absorbing structure according to claim 1, characterized in that A number of sound-absorbing pipes (23) are inserted through at least one partition baffle (2); A number of flow holes (24) are provided on the sound-absorbing pipe (23).

5. A noise reduction structure, characterized in that, Comprising: A number of sound-absorbing cavities (1) connected in sequence; A number of partition baffles (2) arranged in sequence along the air flow direction; At least one through-hole diameter is provided on the partition baffle (2); And when the air flow passes through each sound-absorbing cavity (1) in sequence, the partition baffle (2) absorbs the noise in the air flow.

6. The sound-absorbing structure according to claim 5, characterized in that The partition baffle (2) is internally provided with sound-absorbing material (3).

7. A muffler, characterized in that, Comprising the sound-absorbing structure according to any one of claims 1-4, the muffler further comprises: A housing (4), and the sound-absorbing structure is installed in the housing (4).

8. The muffler according to claim 7, characterized in that An air inlet pipe (41) and an exhaust pipe (42) are respectively inserted through both ends of the housing (4); A number of air inlet holes (411) are provided on the air inlet pipe (41); A number of exhaust holes (421) are provided on the exhaust pipe (42).

9. The muffler according to claim 8, characterized in that The side wall of the housing (4) close to the air inlet pipe (41) is provided with sound-absorbing material (3).

10. The muffler according to claim 8, characterized in that The end wall of the housing (4) close to the exhaust pipe (42) is provided with sound-absorbing material (3).

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