CN116927935A

CN116927935A - Exhaust muffler

Info

Publication number: CN116927935A
Application number: CN202310906042.0A
Authority: CN
Inventors: 于正勇; 吴中涛; 向松; 龙雨佳; 姚长春; 吴鹏
Original assignee: Chongqing Rato Technology Co Ltd
Current assignee: Chongqing Rato Technology Co Ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2023-10-24

Abstract

The application provides an exhaust muffler, which comprises a shell, a first sleeve, a catalytic unit and a silencing pipe, wherein the shell is provided with a first partition board, an air inlet pipe and an air outlet pipe, the first partition board divides an inner cavity of the shell into a first cavity and a second cavity, a gap is formed between the catalytic unit and the first sleeve, and the catalytic unit is respectively communicated with the first cavity and the second cavity. A plurality of first silencing holes are formed in the pipe wall of the silencing pipe, and silencing cotton covering the first silencing holes is wrapped on the silencing pipe. The first sleeve can block heat conduction generated by the catalytic unit during operation, so that the overall temperature of the shell is effectively reduced, and the service life of the exhaust muffler is prolonged. Meanwhile, the exhaust path of the exhaust gas flow is prolonged, so that noise is weakened gradually in the propagation process, and therefore, the exhaust gas flow can be subjected to sufficient silencing, noise reduction and heat insulation treatment, the exhaust temperature is reduced, and the noise reduction and heat insulation effects of the exhaust muffler are improved.

Description

Exhaust muffler

Technical Field

The application relates to the technical field of mufflers, in particular to an exhaust muffler.

Background

The generator set is commonly used for temporary or emergency situations such as field operation, power failure and the like, and the main structure of the generator set generally comprises a chassis, a generator, an engine, a control box, a muffler and an oil tank. Exhaust noise of an engine is a main noise source of a generator set, and therefore, the purpose of noise elimination and noise reduction is required by improving the internal structure of a muffler.

Meanwhile, exhaust gas flows generated in the working process of the engine have harmful gases such as CO, HC and NOx, and a catalytic device is required to be designed in the muffler to purify the exhaust gas flows. Because the exhaust gas flow can generate combustion and oxidation reaction in the process of passing through the catalytic device, the temperature of the catalytic device can be increased, and the temperature of the exhaust gas flow after catalysis can be increased, so that the temperature of the whole silencer can be increased, and the service life of the silencer is shortened.

Disclosure of Invention

Aiming at the defects in the prior art, the application aims to provide an exhaust muffler for preventing heat conduction generated by a catalytic device during operation, reducing the overall temperature of the muffler and improving the noise elimination and reduction effects.

In order to achieve the above object, the present application provides an exhaust muffler including a housing provided with a first partition, an intake pipe, and an exhaust pipe, the first partition dividing an inner cavity of the housing into a first chamber and a second chamber, the first chamber being in communication with the intake pipe, the exhaust pipe extending into the first chamber; the first sleeve is arranged on the first partition board in a penetrating way; the catalytic unit is arranged in the first sleeve in a penetrating way, a gap is formed between the catalytic unit and the first sleeve, and the catalytic unit is respectively communicated with the first chamber and the second chamber; and the silencing pipe penetrates through the first partition board and is respectively communicated with the second cavity and the exhaust pipe, a plurality of first silencing holes are formed in the pipe wall of the silencing pipe, and silencing cotton covering the first silencing holes is wrapped on the silencing pipe.

Preferably, the silencing cotton jacket is provided with a second sleeve, and the second sleeve is arranged on the first partition board in a penetrating mode.

Preferably, the air inlet end of the catalytic unit is provided with a first connecting pipe, the first connecting pipe is positioned in the first cavity, and the pipe wall of the first connecting pipe is provided with a plurality of first through holes.

Preferably, the end of the first connecting pipe far away from the catalytic unit is in a closed structure.

Preferably, the exhaust end of the catalytic unit is provided with a second connecting pipe, the second connecting pipe is positioned in the second cavity, and the pipe wall of the second connecting pipe is provided with a plurality of second through holes.

Preferably, the end of the second connecting pipe far away from the catalytic unit is in a closed structure.

Preferably, a silencing cover is arranged in the first chamber, a silencing cavity is arranged in the silencing cover, and the exhaust pipe is communicated with the silencing cavity; the exhaust end of the silencing pipe stretches into the silencing cavity, and a plurality of second silencing holes are formed in the pipe wall of the silencing cavity.

Preferably, the end of the silencing pipe away from the second chamber is in a closed structure.

Preferably, the device further comprises a second partition plate, wherein the second partition plate divides the second chamber into a first sub-chamber and a second sub-chamber which are communicated, and the first sub-chamber is positioned between the first chamber and the second sub-chamber; and a plurality of third silencing holes are formed in the second partition plate, and the second subchamber is communicated with the air inlet end of the silencing pipe.

The application has the beneficial effects that:

the application discloses an exhaust muffler, which is characterized in that a catalytic unit is designed in a first sleeve, and the first sleeve can block heat conduction generated by the catalytic unit during operation, so that the overall temperature of a shell is effectively reduced, and the service life of the exhaust muffler is prolonged. Meanwhile, under the condition that the size of the muffler is not increased, the exhaust path of the exhaust gas flow is prolonged by designing the first chamber, the second chamber, the muffler pipe and the muffler cotton, so that noise is weakened gradually in the propagation process, the exhaust gas flow can be sufficiently subjected to noise reduction and heat insulation treatment, the exhaust temperature is reduced, and the noise reduction and heat insulation effects of the exhaust muffler are improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a schematic view of the structure of an exhaust muffler according to the first embodiment;

FIG. 2 is a schematic cross-sectional view of an exhaust muffler according to a first embodiment;

fig. 3 is a schematic view of the structure of the inside of an exhaust muffler according to the second embodiment;

fig. 4 is a schematic cross-sectional view of an exhaust muffler according to a second embodiment;

reference numerals:

10-a shell, 11-a first partition board, 12-an air inlet pipe, 13-an exhaust pipe, 14-a first chamber, 15-a second chamber, 151-a first subchamber, 152-a second subchamber, 16-a second partition board and 161-a third silencing hole;

20-a first sleeve;

30-a catalytic unit;

40-gap;

50-of a silencing pipe, 51-of a first silencing hole, 52-of silencing cotton, 53-of a second silencing hole and 54-of a third sealing cover;

60-a second sleeve;

71-first connecting tube, 711-first through hole, 712-first cover, 72-second connecting tube, 721-second through hole, 722-second cover;

80-a silencing cover and 81-a silencing cavity.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Example 1

As shown in fig. 1 and 2, in an embodiment of the present application, there is provided an exhaust muffler including a housing 10, a first sleeve 20, a catalytic unit 30, and a muffler pipe 50, the housing 10 being provided with a first partition 11, an intake pipe 12, and an exhaust pipe 13, the first partition 11 dividing an inner cavity of the housing 10 into a first chamber 14 and a second chamber 15, the first chamber 14 being in communication with the intake pipe 12, the exhaust pipe 13 extending into the first chamber 14. The first sleeve 20 and the muffler pipe 50 are both arranged on the first partition 11 in a penetrating manner, the catalytic unit 30 (i.e. catalyst) is arranged in the first sleeve 20 in a penetrating manner, a gap 40 is formed between the catalytic unit 30 and the first sleeve 20, and the catalytic unit 30 is respectively communicated with the first chamber 14 and the second chamber 15. The silencing pipe 50 is respectively communicated with the second chamber 15 and the exhaust pipe 13, a plurality of first silencing holes 51 are formed in the pipe wall of the silencing pipe 50, silencing cotton 52 covering the first silencing holes 51 is wrapped on the silencing pipe 50, and the silencing cotton 52 is made of glass fiber materials.

When the exhaust muffler works, the exhaust gas flow generated by the internal combustion engine enters the first chamber 14 from the air inlet pipe 12, and the exhaust gas flow can be purified by the catalytic unit 30 in the process of passing through the catalytic unit 30, namely, the exhaust gas flow can be fully combusted in the process of passing through the catalytic unit 30, so that the purification degree of the gas discharged by the exhaust pipe 13 is greatly improved.

In this process, the temperature of the catalytic unit 30 increases, and since the catalytic unit 30 is disposed in the first sleeve 20 with the gap 40 between the catalytic unit 30 and the first sleeve 20, the first sleeve 20 can block the conduction of heat generated during the operation of the catalytic unit 30, thereby effectively reducing the overall temperature of the housing 10. At the same time, the high temperature also contributes to the operation of the catalytic unit 30, so that a better catalytic action on the exhaust gas flow is achieved.

After the air flow discharged from the catalytic unit 30 enters the second chamber 15, the air flow can only flow to the silencing pipe 50, and part of noise can be absorbed by the silencing pipe 50 when the air flow passes through the silencing pipe 50 because the first silencing holes 51 of the silencing pipe 50 form a resonance sound absorption structure, and the silencing cotton 52 wraps the silencing pipe 50, so that the noise energy is converted into heat energy by utilizing the friction and damping action of the silencing cotton 52 on the sound wave, and the purposes of silencing and noise reduction are achieved.

In addition, the noise reduction cotton 52 also has a heat insulation function, so that the problem of the temperature rise of the shell 10 caused by the overhigh temperature of the noise reduction pipe 50 is effectively avoided. After passing through the muffler pipe 50, the air flows to the exhaust pipe 13 located in the first chamber 14, and finally is exhausted from the exhaust pipe 13 to the outside of the casing 10.

In summary, according to the exhaust muffler disclosed in the present embodiment, the catalytic unit 30 is designed in the first sleeve 20, and the first sleeve 20 can block the radiant heat generated during the operation of the catalytic unit 30, so that the overall temperature of the housing 10 is effectively reduced, and the service life of the exhaust muffler is prolonged. Meanwhile, under the condition that the size of the muffler is not increased, the exhaust path of the exhaust gas flow is prolonged by designing the first chamber 14, the second chamber 15, the silencing pipe 50 and the silencing cotton 52, so that noise is weakened gradually in the propagation process, the exhaust gas flow can be subjected to sufficient silencing, noise reduction and heat insulation treatment, the exhaust temperature is reduced, and the noise reduction and heat insulation effects of the exhaust muffler are improved.

In one embodiment, the silencing cotton 52 is sleeved with a second sleeve 60, and the second sleeve 60 is arranged on the first partition 11 in a penetrating mode. The second sleeve 60 has a good fixing effect on the silencing cotton 52, and ensures that the silencing cotton 52 cannot fall down to block the exhaust pipe 13 in the working process of the exhaust muffler, thereby ensuring the silencing and noise reducing effects of the silencing pipe 50 and the heat insulating effects of the silencing cotton 52.

In one embodiment, the air inlet end of the catalytic unit 30 is provided with a first connecting pipe 71, the first connecting pipe 71 is located in the first chamber 14, and a plurality of first through holes 711 are formed in the pipe wall of the first connecting pipe 71. After the exhaust gas flow enters the first chamber 14 from the inlet pipe 12, the flow speed of the exhaust gas flow is reduced and noise is attenuated to some extent due to the abrupt expansion of the passage. At the same time, the noise collides with the cavity wall of the first cavity 14, and is mutually rubbed to cancel, and finally, a part of the noise is destroyed, so that the purposes of noise elimination and noise reduction are achieved. Then, the exhaust gas flow can only enter the catalytic unit 30 through the first connection pipe 71 and the first through hole 711, and the noise during passing through the first through hole 711 generates a strong resonance effect so that the noise is attenuated, so that the noise of the exhaust gas flow before entering the catalytic unit 30 is effectively attenuated. Also, the first through holes 711 can disperse sparks in the exhaust gas flow, ensuring safety.

In one embodiment, the end of the first connecting pipe 71 far away from the catalytic unit 30 is in a closed structure, and the pipe orifice of the first connecting pipe 71 is plugged with the first sealing cover 712, so that the exhaust gas flow can only enter the first connecting pipe 71 through the first through hole 711, and the effects of silencing and noise reduction are improved.

In one embodiment, the exhaust end of the catalytic unit 30 is provided with a second connecting pipe 72, the second connecting pipe 72 is located in the second chamber 15, and a plurality of second through holes 721 are formed in the pipe wall of the second connecting pipe 72. After the exhaust gas flow is oxidized by the catalytic unit 30, the exhaust gas flow can only enter the second chamber 15 through the second connection pipe 72 and the second through hole 721, and the noise can generate a strong resonance effect in the process of passing through the second through hole 721, so that the noise is weakened, and the noise of the exhaust gas flow before entering the second chamber 15 is further weakened. The second through holes 721 can disperse sparks in the exhaust gas flow, and ensure safety.

In one embodiment, the end of the second connecting pipe 72 far away from the catalytic unit 30 is in a closed structure, and the orifice of the second connecting pipe 72 is plugged with the second sealing cover 722, so that the exhaust gas flow can only enter the second chamber 15 through the second through hole 721, and the effects of silencing and noise reduction are improved.

In one embodiment, a muffler cover 80 is provided in the first chamber 14, a muffler chamber 81 is provided in the muffler cover 80, and the exhaust pipe 13 communicates with the muffler chamber 81. The exhaust end of the silencing pipe 50 extends into the silencing cavity 81, and a plurality of second silencing holes 53 are formed in the pipe wall of the silencing pipe 50 located in the silencing cavity 81. A part of the exhaust gas flow is directly discharged into the muffler chamber 81 through the orifice of the muffler pipe 50, and the remaining part of the exhaust gas flow is discharged into the muffler chamber 81 through the second muffler hole 53, and after the exhaust gas flow is discharged into the muffler chamber 81, the flow rate thereof is reduced, and noise is attenuated to some extent. Meanwhile, noise is further attenuated in passing through the second sound deadening hole 53.

In one embodiment, the end of the silencing tube 50 far away from the second chamber 15 is in a closed structure, and the orifice of the silencing tube 50 is plugged with the third sealing cover 54, so that the exhaust gas flow can only enter the silencing cavity 81 through the second silencing hole 53, and the silencing and noise reducing effects are improved.

Example two

In this embodiment, the components of the first embodiment are the same as the working principle, except that referring to fig. 3 and 4, in this embodiment, the exhaust muffler further includes a second partition 16, where the second partition 16 divides the second chamber 15 into a first sub-chamber 151 and a second sub-chamber 152 that are communicated, and the first sub-chamber 151 is located between the first chamber 14 and the second sub-chamber 152. The second partition 16 is provided with a plurality of third silencing holes 161, and the second subchamber 152 is communicated with the air inlet end of the silencing pipe 50. The second connection pipe 72 and the second sleeve 60 are both provided to penetrate the second separator 16.

After the exhaust gas flow discharged from the second through hole 721 enters the first sub-chamber 151, it enters the second sub-chamber 152 only through the third sound deadening hole 161 on the second partition 16, and finally enters the sound deadening pipe 50. Therefore, the design of the second separator 16 can not only lengthen the flow path of the exhaust gas flow, but also achieve the purpose of silencing and reducing noise. The second partition 16 also supports the second connection pipe 72 and the second sleeve 60, and also improves the overall structural strength of the exhaust muffler.

In the description of the present application, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description.

Claims

1. An exhaust muffler, comprising:

the device comprises a shell, a first partition plate, an air inlet pipe and an air outlet pipe, wherein the first partition plate divides an inner cavity of the shell into a first cavity and a second cavity, the first cavity is communicated with the air inlet pipe, and the air outlet pipe extends into the first cavity;

the first sleeve is arranged on the first partition board in a penetrating way;

the catalytic unit is arranged in the first sleeve in a penetrating way, a gap is formed between the catalytic unit and the first sleeve, and the catalytic unit is respectively communicated with the first chamber and the second chamber; and

the silencer pipe is arranged on the first partition board in a penetrating mode, the silencer pipe is respectively communicated with the second cavity and the exhaust pipe, a plurality of first silencing holes are formed in the pipe wall of the silencer pipe, and silencing cotton covering the first silencing holes is wrapped on the silencer pipe.

2. The exhaust muffler of claim 1, wherein the cotton muffler is sleeved with a second sleeve, the second sleeve being threaded over the first baffle.

3. The exhaust muffler according to claim 1, wherein the air inlet end of the catalytic unit is provided with a first connecting pipe, the first connecting pipe is located in the first chamber, and a plurality of first through holes are formed in the pipe wall of the first connecting pipe.

4. The exhaust muffler of claim 3, wherein an end of the first connecting tube remote from the catalytic unit is in a closed configuration.

5. The exhaust muffler according to claim 1, wherein the exhaust end of the catalytic unit is provided with a second connecting pipe, the second connecting pipe is located in the second chamber, and a plurality of second through holes are formed in the pipe wall of the second connecting pipe.

6. The exhaust muffler of claim 5, wherein an end of the second connecting tube remote from the catalytic unit is in a closed configuration.

7. The exhaust muffler of claim 1, wherein a muffler cover is disposed within the first chamber, a muffler cavity is disposed within the muffler cover, and the exhaust pipe communicates with the muffler cavity; the exhaust end of the silencing pipe stretches into the silencing cavity, and a plurality of second silencing holes are formed in the pipe wall of the silencing cavity.

8. The exhaust muffler of claim 7, wherein an end of the muffler pipe remote from the second chamber is in a closed configuration.

9. The exhaust muffler of claim 1, further comprising a second partition dividing the second chamber into communicating first and second subchambers, the first subchamber being located between the first and second subchambers; and a plurality of third silencing holes are formed in the second partition plate, and the second subchamber is communicated with the air inlet end of the silencing pipe.