Noise reduction structure of silencer

Abstract

The utility model discloses a noise reduction structure of a silencer. Glass wool is fixedly connected to the right side of an inner cavity of the silencer body, and rock wool is fixedly connected to the position, located on the left side of the glass wool, of the inner cavity of the silencer body. Due to the arrangement of the noise reduction mechanism, sound airflow can enter the silencer body, sound waves are guided to enter the section disc in cooperation with the connecting cylinder, when the sound waves sequentially penetrate through the section disc and the connecting ring to enter the small-hole disc and encounter sudden change of the section such as sudden enlargement or reduction, part of the sound waves can be reflected back, and noise is reduced. When sound waves enter a small pipeline from a large pipeline, due to the fact that the section is suddenly reduced, the sound waves can be reflected at the connector, the sound energy which is transmitted forwards is reduced, then the sound waves are transmitted in the two pipelines by different paths in cooperation with the double-outlet connecting pipe, and then the sound waves are converged at the outlet. The phase difference of two columns of sound waves is just 180 degrees, and destructive interference is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, in particular to a noise reduction structure of a muffler. Background Art

[0002] A muffler is a device that allows air to pass through while effectively preventing or reducing the spread of sound energy.

[0003] The sound-absorbing material is fixed on the inner wall of the air flow channel or arranged in a certain way in the pipe. When the sound wave enters the resistive muffler, part of the sound energy is converted into heat energy by friction in the pores of the porous material and dissipated, so that the sound wave passing through the muffler is weakened. However, the existing muffler only has a single material for noise reduction, resulting in poor noise reduction effect and reducing the effectiveness of the muffler.

[0004] Therefore, it is necessary to redesign the muffler to effectively prevent the problem that the muffler has only a single material for noise reduction, resulting in poor noise reduction effect. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide a noise reduction structure of a muffler, which has the advantage of good noise reduction effect and solves the problem that the muffler only has a single material for noise reduction, resulting in poor noise reduction effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a noise reduction structure of a muffler, comprising:

[0007] Muffler body;

[0008] The right side of the inner cavity of the muffler body is fixedly connected to glass wool, the inner cavity of the muffler body and the left side of the glass wool are fixedly connected to rock wool, the inner cavity of the muffler body and the left side of the rock wool are fixedly connected to polyester fiber, and the inner cavity of the muffler body and the left side of the polyester fiber are fixedly connected to a noise reduction mechanism;

[0009] The noise reduction mechanism includes a connecting tube, a cross-sectional disk, a connecting ring, a small hole disk and a double-outlet connecting pipe. The inner cavity of the muffler body is fixedly connected to the left side of the polyester fiber with a connecting tube, the left side of the connecting tube is fixedly connected to the cross-sectional disk, the left side of the cross-sectional disk is fixedly connected to the connecting ring, the left side of the connecting ring is fixedly connected to the small hole disk, the left side of the small hole disk is connected to the double-outlet connecting pipe, and the left side of the double-outlet connecting pipe is connected to the left side of the inner wall of the muffler body.

[0010] As a preferred embodiment of the present invention, the surfaces of the glass wool, rock wool and polyester fiber are all fixedly sleeved with limiting rings, and the surfaces of the limiting rings are fixedly connected to the inner side of the muffler body.

[0011] As a preferred embodiment of the present invention, a through hole is opened on the surface of the cross-sectional disk, and the through hole is used in conjunction with the cross-sectional disk.

[0012] As a preferred embodiment of the present invention, circular holes are provided on the surfaces of the connecting tube and the connecting ring, and the circular holes are used in conjunction with the connecting tube and the connecting ring.

[0013] As a preferred embodiment of the present invention, mesh holes are provided on the left and right sides of the surface of the muffler body, and the mesh holes are used in conjunction with the muffler body.

[0014] As a preferred embodiment of the present invention, the double-outlet connecting pipe is made of stainless steel, and the double-outlet connecting pipe is used in conjunction with a small hole disk.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The utility model, through the setting of the noise reduction mechanism, can make the sound airflow enter the interior of the muffler body and cooperate with the connecting tube to guide the sound waves into the cross-sectional disk. When the sound waves pass through the cross-sectional disk and the connecting ring and enter the small hole disk in sequence, if they encounter a sudden change in cross-section, such as a sudden expansion or contraction, part of the sound waves will be reflected back and will not continue to propagate forward. When the sound waves enter the smaller pipe from the larger pipe, due to the sudden reduction in cross-section, reflection will be generated at the interface, which reduces the sound energy propagating forward. In combination with the double-outlet connecting pipe, the sound waves propagate different paths in the two pipes and then converge at the outlet, so that the phase difference between the two sound waves is exactly 180 degrees, realizing interference cancellation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 The three-dimensional diagram of the muffler body structure;

[0019] Figure 3 For this utility model Figure 2 Exploded view of the connecting tube, cross-section plate and connecting ring structure;

[0020] Figure 4 For this utility model Figure 2 Stereoscopic diagram of the mid-section disk, connecting ring and small hole disk structure.

[0021] In the figure: 1. Muffler body; 2. Glass wool; 3. Rock wool; 4. Polyester fiber; 5. Noise reduction mechanism; 51. Connecting tube; 52. Cross-section disk; 53. Connecting ring; 54. Small hole disk; 55. Double-outlet connecting pipe; 6. Limiting ring; 7. Through hole; 8. Round hole; 9. Mesh. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 4 As shown, the utility model provides a noise reduction structure of a muffler, comprising:

[0024] Muffler body 1;

[0025] Glass wool 2 is fixedly connected to the right side of the inner cavity of the muffler body 1, rock wool 3 is fixedly connected to the inner cavity of the muffler body 1 and on the left side of the glass wool 2, polyester fiber 4 is fixedly connected to the inner cavity of the muffler body 1 and on the left side of the rock wool 3, and a noise reduction mechanism 5 is fixedly connected to the inner cavity of the muffler body 1 and on the left side of the polyester fiber 4;

[0026] The noise reduction mechanism 5 includes a connecting tube 51, a cross-sectional disk 52, a connecting ring 53, a small hole disk 54 and a double-outlet connecting pipe 55. The inner cavity of the muffler body 1 and the left side of the polyester fiber 4 are fixedly connected with the connecting tube 51, the left side of the connecting tube 51 is fixedly connected with the cross-sectional disk 52, the left side of the cross-sectional disk 52 is fixedly connected with the connecting ring 53, the left side of the connecting ring 53 is fixedly connected with the small hole disk 54, the left side of the small hole disk 54 is connected with the double-outlet connecting pipe 55, and the left side of the double-outlet connecting pipe 55 is connected to the left side of the inner wall of the muffler body 1.

[0027] refer to Figure 2 The surfaces of the glass wool 2 , rock wool 3 and polyester fiber 4 are all fixedly sleeved with a limiting ring 6 , and the surface of the limiting ring 6 is fixedly connected to the inner side of the muffler body 1 .

[0028] As a technical optimization solution of the present invention, the setting of the limiting ring 6 can assist the glass wool 2, rock wool 3 and polyester fiber 4 in working, and at the same time play a fixing role, thereby avoiding the glass wool 2, rock wool 3 and polyester fiber 4 from vibrating under high-frequency sound waves.

[0029] refer to Figure 3 A through hole 7 is provided on the surface of the cross-sectional disk 52 , and the through hole 7 is used in conjunction with the cross-sectional disk 52 .

[0030] As a technical optimization solution of the present invention, the provision of the through hole 7 can assist the cross-sectional disk 52 in working, thereby avoiding the cross-sectional disk 52 being a solid sound wave to realize material transmission noise.

[0031] refer to Figure 4, the surfaces of the connecting tube 51 and the connecting ring 53 are both provided with a circular hole 8 , and the circular hole 8 is used in conjunction with the connecting tube 51 and the connecting ring 53 .

[0032] As a technical optimization solution of the present invention, the setting of the circular hole 8 can enable the sound waves to pass through the connecting tube 51 and the connecting ring 53 and enter the interior of the cross-sectional disk 52 and the small hole disk 54, thereby avoiding the connection tube 51 and the connecting ring 53 realizing the sound wave to realize the material transmission noise.

[0033] refer to Figure 1 Mesh holes 9 are provided on the left and right sides of the surface of the muffler body 1 , and the mesh holes 9 are used in conjunction with the muffler body 1 .

[0034] As a technical optimization solution of the present invention, the setting of the mesh 9 can assist the glass wool 2, rock wool 3 and polyester fiber 4 in their work, and at the same time play the role of dissipating sound waves, thereby avoiding the noise inside the muffler body 1 from being unable to quickly spread to the outside world to achieve the effect of noise reduction.

[0035] refer to Figure 3 The double-outlet connecting pipe 55 is made of stainless steel and is used in conjunction with the small hole disc 54 .

[0036] As a technical optimization solution of the present invention, the provision of the double-outlet connecting pipe 55 can increase the service life of the double-outlet connecting pipe 55 and avoid the phenomenon of oxidation and rusting of the double-outlet connecting pipe 55 during use.

[0037] The working principle and use process of the utility model are as follows: when in use, sound waves enter the interior of the muffler body 1 and pass through the glass wool 2, rock wool 3 and polyester fiber 4 in turn. There are a large number of interconnected tiny pores inside these materials. When the sound waves enter these pores, they will cause the air molecules in the pores to vibrate. Due to the friction between the air and the pore wall, and the viscous resistance of the air molecules themselves, the sound energy will be converted into heat energy and consumed. After the sound waves pass through the glass wool 2, rock wool 3 and polyester fiber 4 to complete the initial noise reduction, they will propagate to the interior of the connecting tube 51 and cooperate with the cross-sectional disk 52 and the connecting tube 52 to dissipate the heat. The ring 53 and the small hole disk 54 ensure that when the sound wave encounters a sudden change in cross-section during propagation, such as a sudden expansion or contraction, part of the sound wave will be reflected back and will not continue to propagate forward. The sound wave enters the smaller small hole disk 54 from the larger cross-section disk 52 of the through hole 7. Due to the sudden reduction in cross-section, reflection will be generated at the interface, reducing the sound energy propagating forward. Finally, the double-outlet connecting pipe 55 is used to make the sound waves propagate different paths in the two pipes and then converge at the outlet, so that the phase difference between the two sound waves is exactly 180 degrees, realizing interference cancellation, thereby achieving a good noise reduction effect.

[0038] To sum up: the noise reduction structure of the silencer, through the use of the silencer body 1, glass wool 2, rock wool 3, polyester fiber 4, noise reduction mechanism 5, connecting tube 51, cross-sectional disk 52, connecting ring 53, small hole disk 54 and double-outlet connecting pipe 55, solves the problem that the existing silencer only has a single material for noise reduction, resulting in poor noise reduction effect.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure of a muffler, characterized in that: include: Muffler body (1); The right side of the inner cavity of the muffler body (1) is fixedly connected to glass wool (2), the inner cavity of the muffler body (1) is fixedly connected to rock wool (3) on the left side of the glass wool (2), the inner cavity of the muffler body (1) is fixedly connected to polyester fiber (4) on the left side of the rock wool (3), and the inner cavity of the muffler body (1) is fixedly connected to a noise reduction mechanism (5) on the left side of the polyester fiber (4); The noise reduction mechanism (5) comprises a connecting tube (51), a cross-sectional disc (52), a connecting ring (53), a small hole disc (54) and a double-outlet connecting pipe (55); the inner cavity of the muffler body (1) and the left side of the polyester fiber (4) are fixedly connected to the connecting tube (51); the left side of the connecting tube (51) is fixedly connected to the cross-sectional disc (52); the left side of the cross-sectional disc (52) is fixedly connected to the connecting ring (53); the left side of the connecting ring (53) is fixedly connected to the small hole disc (54); the left side of the small hole disc (54) is connected to the double-outlet connecting pipe (55); the left side of the double-outlet connecting pipe (55) is connected to the left side of the inner wall of the muffler body (1).

2. The noise reduction structure of a muffler according to claim 1, characterized in that: The surfaces of the glass wool (2), rock wool (3) and polyester fiber (4) are all fixedly sleeved with a limiting ring (6), and the surface of the limiting ring (6) is fixedly connected to the inner side of the muffler body (1).

3. The noise reduction structure of a muffler according to claim 1, characterized in that: A through hole (7) is provided on the surface of the cross-sectional disk (52), and the through hole (7) is used in conjunction with the cross-sectional disk (52).

4. The noise reduction structure of a muffler according to claim 1, characterized in that: Circular holes (8) are provided on the surfaces of the connecting tube (51) and the connecting ring (53), and the circular holes (8) are used in conjunction with the connecting tube (51) and the connecting ring (53).

5. The noise reduction structure of a muffler according to claim 1, characterized in that: Mesh holes (9) are provided on the left and right sides of the surface of the muffler body (1), and the mesh holes (9) are used in conjunction with the muffler body (1).

6. The noise reduction structure of a muffler according to claim 1, characterized in that: The double-outlet connecting pipe (55) is made of stainless steel and is used in conjunction with the small hole disc (54).

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