Exhaust silencer

Abstract

The utility model discloses an exhaust silencer which comprises a shell, the interior of the shell is divided into a first air inlet cavity, a second air inlet cavity and an air outlet cavity through partition plates, and the first air inlet cavity and the second air inlet cavity are located on the two sides of the air outlet cavity respectively. The shell is provided with a first air inlet communicated with the first air inlet cavity, a second air inlet communicated with the second air inlet cavity and an exhaust port communicated with the air outlet cavity, the first air inlet cavity is communicated with the air outlet cavity through a zigzag first ventilation pipe, and the second air inlet cavity is communicated with the air outlet cavity through a zigzag second ventilation pipe. According to the scheme, the problem that in the prior art, the silencing effect of an exhaust silencer is poor is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust muffler. BACKGROUND

[0002] Exhaust muffler is a kind of equipment for reducing the exhaust noise of internal combustion engine, it is widely used in various internal combustion engine driven mechanical equipment, such as car, ship, generator set etc.. When internal combustion engine works, high-temperature high-speed airflow will produce larger noise when rushing out exhaust pipe. So set up exhaust muffler to reduce this noise, thereby reducing the influence of noise on surrounding environment.

[0003] Chinese patent document CN219605372U discloses an acoustic assembly, comprising a muffler, the muffler comprises a muffler box, a muffling baffle, a collection pipe and an exhaust tail pipe, the inside of the muffler box is divided into side cavity and middle cavity by the muffling baffle, the muffling baffle is provided with baffle hole, the side cavity and middle cavity are communicated through baffle hole, one end of the collection pipe extends into middle cavity, the other end of the collection pipe extends into exhaust tail pipe, the exhaust tail pipe is provided with tail pipe hole communicated with outside, the side cavity, middle cavity, collection pipe, exhaust tail pipe and tail pipe hole are communicated and form the passage for exhaust gas discharge. The beneficial effects of the prior art are that: exhaust gas is discharged through exhaust pipe, side cavity, baffle hole, middle cavity, collection pipe hole, collection pipe, exhaust tail pipe and tail pipe hole, the whole exhaust route passes through multiple turns and collision, cooperates with the heat-insulating and sound-absorbing cotton in the outer cover of muffler, and actively good sound-absorbing effect is achieved. Although the scheme of the prior art reduces exhaust noise to a certain extent, but as the requirement for the size of noise is higher and higher now, when facing the exhaust noise of internal combustion engine with larger noise, its sound-absorbing effect is limited, it is difficult to meet higher requirement. At the same time, when setting two exhaust pipes, the structure is prone to the phenomenon of airflow mutual interflow of two exhaust pipes.

[0004] The utility model discloses a kind of exhaust mufflers, barrel, the barrel is equipped with exhaust inlet and exhaust outlet, the barrel inside is equipped with expansion cavity;Partition, the partition is arranged in the barrel, and the barrel is separated into multiple chambers by the partition and is arranged in the gas flow direction;And elbow pipe, the gas inlet of the elbow pipe and the gas outlet of the elbow pipe are located in different chambers;The elbow pipe is one, two or at least three;The elbow pipe is U-shaped pipe, and the elbow pipe is installed on the partition;The partition is one, two or at least three.The beneficial effects of the prior art are that: in exhaust muffler, the barrel is separated into multiple chambers by the partition, and is connected by elbow pipe, the sound wave transmission path is extended, the acoustic impedance is increased, the exhaust pipe noise sound pressure level is effectively reduced, and the subjective sound quality level is improved.Although the scheme of the prior art has the effect of reducing exhaust noise to some extent, it is mainly used for single-inlet and single-outlet airflow mode muffling, and is not suitable for the muffler with two exhaust pipes for air intake. Utility model content

[0005] The utility model discloses an exhaust muffler to solve the problem of poor muffling effect of the prior art exhaust muffler.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides an exhaust muffler, which comprises a shell, the inside of the shell is divided into a first air inlet cavity, a second air inlet cavity and an air outlet cavity by a partition, the first air inlet cavity and the second air inlet cavity are respectively located on both sides of the air outlet cavity, a first air inlet communicating with the first air inlet cavity, a second air inlet communicating with the second air inlet cavity and an exhaust port communicating with the air outlet cavity are arranged on the shell, the first air inlet cavity and the air outlet cavity are communicated by a tortuous first air pipe, and the second air inlet cavity and the air outlet cavity are communicated by a tortuous second air pipe.

[0007] The beneficial effects of the basic scheme are that, compared with the prior art, by adopting such a setting, the flow path of the airflow is significantly lengthened when the airflow flows in the tortuous first air pipe and the second air pipe, so that the noise generated by the airflow can be sufficiently weakened, and the muffling effect of the muffler is improved.

[0008] Preferably, the first air pipe comprises a first curved section located in the second air inlet cavity, and the second air pipe comprises a second curved section located in the first air inlet cavity. By adopting such a setting, the first air pipe and the second air pipe make full use of the space of the first air inlet cavity and the second air inlet cavity, so that the flow path of the airflow is lengthened without significantly increasing the volume of the muffler, thereby avoiding the situation that the volume of the muffler is significantly increased, which leads to increased installation difficulty.

[0009] Preferably, the outlet end of the first vent pipe is arranged in a staggered manner with the outlet end of the second vent pipe. With such an arrangement, the mutual influence of the first vent pipe and the second vent pipe during exhaust is reduced, thereby avoiding the occurrence of excessive exhaust resistance; meanwhile, the phenomenon of air flow interflow between the first intake cavity and the second intake cavity is also avoided.

[0010] Preferably, the first vent pipe and the second vent pipe both penetrate through the partition plate and are fixedly connected with the partition plate. With such an arrangement, the partition plate not only separates the interior of the shell into chambers, but also supports the vent pipes, thereby facilitating the simplification of the structure of the muffler and the reduction of manufacturing cost.

[0011] Preferably, the first vent pipe and the second vent pipe are both provided with sound holes. With such an arrangement, the sound reduction effect of the muffler is further improved.

[0012] Preferably, the sound holes are located in the outlet cavity, and the first vent pipe and the second vent pipe are both provided with sound reduction pipes which are sleeved outside the sound holes. With such an arrangement, the sound reduction pipes are arranged in the space of the outlet cavity, thereby further improving the sound reduction effect of the muffler.

[0013] Preferably, the exhaust port is communicated with an exhaust guide pipe, and the exhaust guide pipe is provided with an exhaust hole facing the shell. With such an arrangement, the exhaust guide pipe exhausts towards the shell, thereby further improving the sound reduction effect of the muffler.

[0014] The utility model has the following beneficial effects:

[0015] Compared with the prior art, the present scheme greatly prolongs the flow path of the airflow in the exhaust muffler, effectively improves the sound reduction effect without causing a substantial increase in the volume of the muffler, avoids the phenomenon of air flow interflow between the intake cavities, and improves the reliability of the muffler. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic view of an embodiment of the exhaust muffler of the utility model. DETAILED DESCRIPTION

[0017] The following will be further described in detail through specific embodiments:

[0018] The reference signs in the drawings of the specification include: shell 1, first intake cavity 2, partition plate 3, second vent pipe 4, second curved section 41, second intake cavity 5, outlet cavity 6, sound hole 7, sound reduction pipe 8, first vent pipe 9, first curved section 91, exhaust guide-in pipe 10, exhaust guide pipe 11, and exhaust hole 12.

[0019] The embodiment is basically as shown in the drawings.Figure 1 As shown in the figure: an exhaust muffler, comprising a shell 1, the inside of the shell 1 is divided into a first air inlet cavity 2, a second air inlet cavity 5 and an air outlet cavity 6 by a partition 3, the first air inlet cavity 2 and the second air inlet cavity 5 are respectively located on both sides of the air outlet cavity 6. In this embodiment, the partition 3 is provided with two, and the air outlet cavity 6 is located between the two partitions 3. The shell 1 is provided with a first air inlet communicating with the first air inlet cavity 2, a second air inlet communicating with the second air inlet cavity 5 and an exhaust port communicating with the air outlet cavity 6. In this embodiment, an exhaust inlet pipe 10 is connected at the first air inlet and the second air inlet respectively; an exhaust outlet pipe is connected at the exhaust port, and the end of the exhaust outlet pipe away from the exhaust port is connected with an exhaust guide pipe 11, and the exhaust guide pipe 11 is vertically arranged with the exhaust outlet pipe. The exhaust guide pipe 11 is provided with an exhaust hole 12 towards the shell 1.

[0020] The first air inlet cavity 2 and the air outlet cavity 6 are communicated by a tortuous first air pipe 9. The first air pipe 9 includes a first curved section 91 located in the second air inlet cavity 5. The first air pipe 9 penetrates through the partition 3 and is connected and fixed with the partition 3, so that the partition 3 supports the first air pipe 9. The first air pipe 9 is provided with a sound attenuation hole 7. The sound attenuation hole 7 is located in the air outlet cavity 6, and the first air pipe 9 is provided with a sound attenuation pipe 8 sleeved outside the sound attenuation hole 7. In this embodiment, the sound attenuation pipe 8 is a double-layer pipe, and the end of the sound attenuation pipe 8 is connected and fixed with the partition 3.

[0021] The second air inlet cavity 5 and the air outlet cavity 6 are communicated by a tortuous second air pipe 4. The second air pipe 4 includes a second curved section 41 located in the first air inlet cavity 2. The second air pipe 4 penetrates through the partition 3 and is connected and fixed with the partition 3, so that the partition 3 supports the second air pipe 4. The second air pipe 4 is provided with a sound attenuation hole 7. The sound attenuation hole 7 is located in the air outlet cavity 6, and the second air pipe 4 is provided with a sound attenuation pipe 8 sleeved outside the sound attenuation hole 7. In this embodiment, the sound attenuation pipe 8 is a double-layer pipe, and the end of the sound attenuation pipe 8 is connected and fixed with the partition 3. The outlet end of the first air pipe 9 and the outlet end of the second air pipe 4 are arranged in a staggered manner, so as to avoid the phenomenon of air flow mutual interflow between the outlet end of the first air pipe 9 and the outlet end of the second air pipe 4, and further avoid the phenomenon of air flow mutual interflow between the first air inlet cavity 2 and the second air inlet cavity 5.

[0022] The specific implementation process is as follows: the path shown by the arrow in the figure is the flow path of the gas flow. In use, the gas discharged by the internal combustion engine enters the first air inlet cavity 2 and the second air inlet cavity 5 through the exhaust gas introduction pipe 10, the gas flow entering the first air inlet cavity 2 then flows along the first air passage 9 in sequence through the region provided with the sound reduction hole 7 and the first curved section 91 and then enters the air outlet cavity 6, the gas flow entering the second air inlet cavity 5 then flows along the second air passage 4 in sequence through the region provided with the sound reduction hole 7 and the second curved section 41 and then enters the air outlet cavity 6, and finally the gas flow enters the exhaust gas guide pipe 11 from the air outlet of the air outlet cavity 6 and is discharged from the exhaust hole 12 facing the shell 1. By using the scheme, the exhaust silencer can effectively reduce the exhaust noise of the internal combustion engine, and the phenomenon of gas flow intermixing between the first air inlet cavity 2 and the second air inlet cavity 5 can also be avoided.

[0023] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme and other common knowledge are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. An exhaust muffler, comprising a housing, the interior of which is divided into a first intake chamber, a second intake chamber, and an exhaust chamber by a partition, the first intake chamber and the second intake chamber being located on opposite sides of the exhaust chamber, the housing being provided with a first intake port communicating with the first intake chamber, a second intake port communicating with the second intake chamber, and an exhaust port communicating with the exhaust chamber, characterized in that: The first air inlet chamber and the air outlet chamber are connected by a tortuous first vent pipe, and the second air inlet chamber and the air outlet chamber are connected by a tortuous second vent pipe.

2. The exhaust muffler according to claim 1, characterized in that: The first vent pipe includes a first curved section located within the second air inlet chamber, and the second vent pipe includes a second curved section located within the first air inlet chamber.

3. An exhaust muffler according to claim 2, characterized in that: The outlet end of the first vent pipe is offset from the outlet end of the second vent pipe.

4. An exhaust muffler according to claim 3, characterized in that: Both the first and second vent pipes pass through the partition and are fixedly connected to the partition.

5. An exhaust muffler according to claim 4, characterized in that: Both the first and second vent pipes are equipped with silencers.

6. An exhaust muffler according to claim 5, characterized in that: The silencer hole is located inside the air outlet chamber, and both the first and second air pipes are equipped with silencer tubes sleeved on the outside of the silencer hole.

7. An exhaust muffler according to claim 6, characterized in that: An exhaust guide pipe is connected to the exhaust port, and the exhaust guide pipe is provided with an exhaust hole facing the housing.

Images