CN206917701U - Exhaust silencer and gas extraction system - Google Patents

Abstract

The utility model relates to the technical field of exhaust systems of internal combustion engines, aims to solve the problems of poor muffler effect, large installation workload and large space occupation in the prior art, and provides an exhaust muffler and an exhaust system. In the exhaust muffler provided in the embodiments of the present invention, the first punching pipe communicates with the first subspace and the second subspace. The second punching tube connects the second subspace and the second space; the first punching tube is not parallel to the axis of the cylinder, and the first space has a noise-resistance structure; the outside of the second punching tube is filled with sound-absorbing rock wool , the second space resistive noise reduction structure; it makes the combination of resistive noise reduction and resistance noise reduction to improve the noise reduction effect. Two first passages connecting the first subspace and the outside world are arranged on the cylinder body, and the two first passages combine the two-in-one air inlets to reduce the required number of mufflers. The exhaust system provided in the embodiment of the utility model also has the beneficial effects of occupying less space and improving the noise reduction effect.

Description

Exhaust muffler and exhaust system

technical field

The utility model relates to the technical field of exhaust systems of internal combustion engines, in particular to an exhaust muffler and an exhaust system.

Background technique

Among the noise sources of the exhaust system of the internal combustion engine, the exhaust noise is a high-temperature, high-speed pulsating airflow noise, which is the most energetic part of the engine noise and the most important component of the total engine noise. It is much higher than other noises such as other machine body mechanical noises and intake and exhaust noises. The noise reduction effect of the exhaust muffler directly affects the noise level of the entire unit.

The commonly used muffler is generally a resistant muffler with small air resistance, which mainly eliminates low-frequency noise in the engine exhaust, and has poor effect on medium and high-frequency noise. On the one hand, a large part of the exhaust system of high-power internal combustion engines has two exhaust outlets. If each exhaust outlet has a single muffler, it will have the disadvantages of increasing the installation workload and occupying space. The muffler is not enough.

Utility model content

The utility model aims to provide an exhaust muffler to solve the problems of poor muffler effect, heavy installation workload and large occupied space of the muffler in the prior art.

Another object of the present utility model is to provide an exhaust system with the above-mentioned exhaust muffler.

Embodiments of the utility model are achieved in that:

An exhaust muffler, which includes a cylinder; a first partition, the first partition divides the cylinder into a first space and a second space distributed along the axial direction of the cylinder; a second partition, the second partition divides the cylinder The first space is divided into a first subspace and a second subspace radially distributed along the barrel; a first punching tube, the first punching tube connects the first subspace and the second subspace; a second punching tube, The second punching pipe communicates with the second subspace and the second space. Wherein, the first punching tube is not parallel to the axis of the cylinder; the outside of the second punching tube is filled with sound-absorbing rock wool. The cylindrical body is provided with two first passages connecting the first subspace and the outside world, and the cylindrical body is also provided with a second passage connecting the second space and the outside world.

In the exhaust muffler provided in the embodiment of the present invention, the first partition divides the cylinder into a first space and a second space distributed along the axial direction of the cylinder; the second partition divides the first space into The radial distribution of the first subspace and the second subspace. The first punching pipe communicates with the first subspace and the second subspace. The second punching tube communicates with the second subspace and the second space; wherein, the first punching tube is not parallel to the axis of the cylinder, and the first space has a noise-resistance structure; the outside of the second punching tube is filled with sound-absorbing Rock wool, the second space resistive noise reduction structure; makes the combination of resistive noise reduction and resistance noise reduction, widens the noise reduction frequency range, exhausts the entire frequency range of noise reduction, and improves the noise reduction effect. There are two first passages connecting the first subspace and the outside world on the cylinder body, and a second passage connecting the second space and the outside world on the cylinder body. The two first passages combine the air inlets into one, The number of mufflers required is reduced, the installation is convenient and the space occupied is reduced. The exhaust muffler provided in the embodiment of the utility model has the beneficial effects of small space occupation, easy installation and improved noise reduction effect.

In one embodiment of the present utility model:

The exhaust muffler also includes a third partition, the third partition divides the second space into a third subspace and a fourth subspace; the second punching pipe is located in the third subspace and communicates with the fourth subspace .

In one embodiment of the present utility model:

Both ends of the second punching pipe are respectively connected to the first partition and the third partition.

In one embodiment of the present utility model:

The axis of the second punching tube is parallel to the axis of the barrel.

In one embodiment of the present utility model:

The axis of the first punching tube is perpendicular to the axis of the barrel.

In one embodiment of the present utility model:

The axial length of the first subspace is smaller than the axial length of the second subspace.

In one embodiment of the present utility model:

A deflector is provided in the first subspace, the second subspace and the fourth subspace.

In one embodiment of the present utility model:

The inside walls of the above-mentioned first subspace, the second subspace and the fourth subspace are all provided with sealing plates; the sealing plates and the inner side walls of the cylinder form a heat-insulating cavity.

In one embodiment of the present utility model:

The above-mentioned heat insulation cavity is filled with sound-absorbing rock wool.

An exhaust system includes any one of the above exhaust mufflers, and the exhaust system also includes an exhaust pipe; the opening at one end of the exhaust pipe communicates with the intake pipe of the exhaust muffler.

The beneficial effects of the utility model embodiment are:

In the exhaust muffler provided in the embodiment of the present invention, the first partition divides the cylinder into a first space and a second space distributed along the axial direction of the cylinder; the second partition divides the first space into The radial distribution of the first subspace and the second subspace. The first punching pipe communicates with the first subspace and the second subspace. The second punching pipe communicates with the second subspace and the second space. Among them, the first punching tube is not arranged parallel to the axis of the cylinder, the first space is resistant to noise reduction structure; the outside of the second punching tube is filled with sound-absorbing rock wool, and the second space is resistive and noise-absorbing structure; so that the resistance The combination of noise reduction and resistance noise reduction broadens the noise reduction frequency range, and the exhaust noise reduction in the full frequency range improves the noise reduction effect. There are two first passages connecting the first subspace and the outside world on the cylinder body, and a second passage connecting the second space and the outside world on the cylinder body. The two first passages combine the air inlets into one, The number of mufflers required is reduced, the installation is convenient and the space occupied is reduced. The exhaust muffler provided in the embodiment of the utility model has the beneficial effects of small space occupation, easy installation and improved noise reduction effect.

The exhaust system provided by the utility model includes the above-mentioned exhaust muffler, so it also has the beneficial effects of small space occupation, easy installation and improved noise reduction effect.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the front view of the overall structure of the exhaust muffler provided in the utility model embodiment;

Figure 2 is a front sectional view of the overall structure of the exhaust muffler provided in the embodiment of the present invention;

Fig. 3 is the sectional view of III-III in Fig. 1;

Fig. 4 is a sectional view of IV-IV in Fig. 1 .

Icon: 10-exhaust muffler; 100-cylinder; 110-first space; 112-first subspace; 114-second subspace; 120-second space; 122-third subspace; 124-fourth Subspace; 130-first channel; 140-second channel; 150-deflector; 160-sealing plate; 170-supporting feet; 180-hanging lug; The second partition; 400-the third partition; 500-the first punching tube; 600-the second punching tube.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present utility model, it should be noted that if the orientation or positional relationship indicated by the terms "upper", "lower", "inner" and "outer" are based on the orientation or position shown in the drawings relationship, or the orientation or positional relationship that the utility model product is usually placed in use, is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, with a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, if the terms "first" and "second" appear in the description of the present utility model, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In the description of the embodiment of the present utility model, it should also be noted that, unless otherwise specified and limited, if the terms "setting" and "connection" appear, they should be understood in a broad sense, for example, it can be a fixed connection or a Detachable connection, or integral connection; can be directly connected, can also be indirectly connected through an intermediary, and can be internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1

Fig. 1 is a front view of the overall structure of an exhaust muffler 10 provided in an embodiment of the present invention. It can be seen from FIG. 1 that the exhaust muffler 10 includes a cylindrical body 100 with both ends closed. Two first passages 130 are provided on the side wall at one end of the cylinder body 100, and one second passage 140 is provided on the side wall at the other end of the cylinder body 100. A supporting foot 170 is provided on the outer surface of the barrel 100 close to the first passage 130, and an installation hole (not shown in the figure) is opened on the supporting foot 170 . A water outlet 190 is opened on the outer wall of the barrel 100; the water outlet 190 and the second channel 140 are arranged on opposite sides of the axis of the accommodating cavity. In this embodiment, the first channel 130 is an intake channel, and the second channel 140 is an exhaust channel. Engine exhaust gas enters the barrel 100 through the first passage 130 , and is discharged from the second passage 140 after being silenced in the barrel 100 .

It should be noted that, in this embodiment, the supporting feet 170 provided with installation holes are provided for the purpose of facilitating the installation and fixing of the entire exhaust muffler 10 . It can be understood that in other specific embodiments, the supporting feet 170 may not be provided according to user's requirements.

It should also be noted that in this embodiment, the water outlet 190 is provided in order to be able to discharge the rainwater that accidentally enters from the exhaust outlet of the exhaust muffler 10 to the outside of the exhaust muffler 10 in time. The air inlet of the muffler 10 enters the interior of the internal combustion engine, directly damaging the internal combustion engine; and a large amount of rainwater is absorbed in the muffler cotton and also affects the muffler effect.

Fig. 2 is a front sectional view of the overall structure of the exhaust muffler 10 provided in the embodiment of the present utility model. FIG. 2 clearly shows the internal structure of the exhaust muffler 10 . A first partition 200 , a second partition 300 , a first punching tube 500 and a second punching tube 600 are disposed inside the barrel 100 . The first partition 200 divides the barrel 100 into a first space 110 and a second space 120 distributed along the axial direction of the barrel 100 . The second partition 300 divides the first space 110 into a first subspace 112 and a second subspace 114 radially distributed along the cylinder body 100 . The first punching tube 500 communicates with the first subspace 112 and the second subspace 114 . The second punching tube 600 communicates with the second subspace 114 and the second space 120 . Wherein, the first punching tube 500 is not parallel to the axis of the barrel 100 ; the outside of the second punching tube 600 is filled with sound-absorbing rock wool. The barrel 100 is provided with two first passages 130 connecting the first subspace 112 with the outside world, and the barrel 100 is also provided with a second passage 140 connecting the second space 120 with the outside world.

In this embodiment, the exhaust muffler 10 further includes a third partition 400, and the third partition 400 divides the second space 120 into a third subspace 122 and a fourth subspace 124; It is inside the third subspace 122 and communicates with the fourth subspace 124 . The third partition 400 is set to divide the second space 120 into the third subspace 122 and the fourth subspace 124. During the exhaust gas discharge process, the sound passes through the first subspace 112, the second subspace 114, and the third subspace 122. And the sound waves behind the fourth subspace 124 are prone to reflection and interference phenomena, further reducing middle and low frequency noise, and improving the noise reduction effect.

It should be noted that in this embodiment, the third partition 400 is set to divide the second space 120 into the third subspace 122 and the fourth subspace 124. During the exhaust gas discharge process, the sound passes through the first subspace 112, The sound energy behind the second subspace 114 , the third subspace 122 and the fourth subspace 124 is prone to reflection and interference phenomena, which further reduces middle and low frequency noise and improves the noise reduction effect. It can be understood that in other specific embodiments, the third partition 400 may not be provided according to the needs of users.

In this embodiment, two ends of the second punching tube 600 are respectively connected to the first partition 200 and the third partition 400 . Both ends of the second punching tube 600 are connected to the first partition 200 and the third partition 400 respectively, so that the layout of the second punching tube 600 is more reasonable.

It should be noted that, in this embodiment, both ends of the second punching tube 600 are connected to the first partition 200 and the third partition 400 respectively, so that the layout of the second punching tube 600 is more reasonable. It can be understood that in other specific embodiments, the second punching tube 600 can also be connected in other ways according to the needs of users.

Fig. 3 is a sectional view of III-III in Fig. 1 . Please refer to FIG. 3 , in this embodiment, the axis of the second punching tube 600 is parallel to the axis of the barrel 100 , and there are small holes with a diameter of 8 mm around the second punching tube 600 , and the punching rate is 30%. The sound-absorbing rock wool is arranged on the outside of the second punching pipe 600 for resistive sound-absorbing. Resistive mufflers use sound waves to propagate in porous sound-absorbing materials or sound-absorbing structures, and the sound energy is converted into heat energy due to friction and dissipated, so that the noise propagating along the pipeline is attenuated with distance, so as to achieve the purpose of noise reduction.

It should be noted that in this embodiment, setting the axis of the second punching tube 600 parallel to the axis of the barrel 100 is mainly for a more reasonable spatial layout. It can be understood that, in other specific embodiments, the axis of the second punching tube 600 and the axis of the barrel 100 can also be arranged to intersect with the axis of the barrel 100 according to the needs of users.

Fig. 4 is a sectional view of IV-IV in Fig. 1 . Please refer to FIG. 4 , in this embodiment, the axis of the first punching tube 500 is perpendicular to the axis of the second punching tube 600 . There are small holes with a diameter of 8 mm around the first punching pipe 500, and the punching rate is 30%. The main reason for setting the axis of the first punching tube 500 perpendicular to the axis of the second punching tube 600 is to better eliminate low-frequency noise in the sound.

It should be noted that, in this embodiment, setting the axis of the first punching tube 500 perpendicular to the axis of the barrel 100 is mainly for a more reasonable spatial layout. It can be understood that in other specific embodiments, other positional relationships between the axis of the first punching tube 500 and the axis of the barrel 100 can also be adopted according to the needs of users.

In this embodiment, the axial length of the first subspace 112 is smaller than the axial length of the second subspace 114 . The reason why the axial length of the first subspace 112 is smaller than that of the second subspace 114 is to increase the flow area for the gas in the second subspace 114 to flow into the third subspace 122 , so as to make exhaust gas discharge more smoothly.

It should be noted that, in this embodiment, the axial length of the first subspace 112 is smaller than the axial length of the second subspace 114 in order to increase the flow of gas in the second subspace 114 into the third subspace 122 area, which in turn makes the exhaust gas discharge more smoothly. It can be understood that, in other specific embodiments, the axial length of the first subspace 112 may also be set to be equal to the axial length of the second subspace 114 according to user requirements.

In this embodiment, the first separator 200 includes a first side panel parallel to the axis of the cylinder 100 and a second side panel perpendicular to the axis of the cylinder 100; the first punching tube 500 is disposed on On the first side panel, the first punching tube 500 communicates with the first subspace 112 and the second subspace 114 ; the axis of the first punching tube 500 is perpendicular to the axis of the barrel 100 . Using two side panels perpendicular to each other to form the first partition 200 makes the layout of the second subspace 114 and the first subspace 112 more reasonable, and facilitates exhaust gas to be discharged into the second subspace 114 along the first punching pipe 500 In the process of flowing to the first partition 200 through the reflection of the cylinder 100, the circulation is more reasonable, which is convenient for multiple reflections of the exhaust gas and improves the noise reduction effect.

In this embodiment, deflectors 150 are disposed in the first subspace 112 , the second subspace 114 and the fourth subspace 124 . The deflectors 150 are provided in the first subspace 112 , the second subspace 114 and the fourth subspace 124 to reduce the exhaust back pressure, reduce the exhaust noise, and reduce the vibration of the muffler caused by the exhaust back pressure.

It should be noted that, in this embodiment, the deflectors 150 are provided in the first subspace 112, the second subspace 114, and the fourth subspace 124 to reduce exhaust back pressure, reduce exhaust noise, and Vibration of the small muffler due to exhaust back pressure. It can be understood that, in other specific embodiments, the deflector 150 may also not be provided according to the needs of users.

In this embodiment, the inner side walls of the first subspace 112, the second subspace 114 and the fourth subspace 124 are all provided with a sealing plate 160; not shown); the insulation cavity is filled with sound-absorbing rock wool. A sealing plate 160 is provided on the inner side walls of the first subspace 112, the second subspace 114 and the fourth subspace 124; the sealing plate 160 and the inner side wall of the cylinder 100 form a heat-insulating cavity; the heat-insulating cavity is filled with Acoustic rock wool can effectively increase the noise reduction effect while insulating heat, and make reasonable use of space to reduce the occupied area of the muffler.

It should be noted that, in this embodiment, the inner walls of the first subspace 112, the second subspace 114, and the fourth subspace 124 are all provided with sealing plates 160; Heat insulation chamber: The heat insulation chamber is filled with sound-absorbing rock wool, which can effectively increase the noise reduction effect while heat insulation, and rationally use the space to reduce the occupied area of the muffler. It can be understood that, in other specific embodiments, no heat-insulating cavity may be provided according to user requirements.

In this embodiment, the mouths of the first channel 130 and the second channel 140 are connected with flanges (not shown in the figure). The purpose of setting the flange is to facilitate the connection with the intake pipe and the exhaust pipe.

It should be noted that, in this embodiment, the flange is provided for the convenience of connection with the intake pipe and the exhaust pipe. It can be understood that in other specific embodiments, other connectors can also be used to realize the connection between the intake pipe and the exhaust pipe according to the needs of users

In this embodiment, a supporting foot 170 is provided on the outer surface of the barrel 100 close to the first channel 130 . Mounting holes (not shown in the figure) are opened on the supporting feet 170 . The supporting feet 170 provided with mounting holes are provided to facilitate the installation and fixing of the entire exhaust muffler 10 .

It should be noted that, in this embodiment, the supporting feet 170 provided with installation holes are provided for the purpose of facilitating the installation and fixing of the entire exhaust muffler 10 . It can be understood that in other specific embodiments, the supporting feet 170 may not be provided according to user's requirements.

In this embodiment, a lifting ear 180 is provided on the outer surface of the barrel 100 close to the second channel 140 . The purpose of setting the lifting lug 180 is to better stabilize the exhaust muffler 10 .

It should be noted that, in this embodiment, the purpose of providing the lifting lug 180 is to better stabilize the exhaust muffler 10 . It can be understood that in other specific embodiments, the lifting lug 180 may not be provided according to the needs of users.

In the exhaust muffler 10 provided in the embodiment of the present utility model, the first partition 200 divides the cylinder 100 into a first space 110 and a second space 120 distributed axially along the cylinder 100; the second partition 300 divides the first space A space 110 is divided into a first subspace 112 and a second subspace 114 radially distributed along the cylinder body 100 . The first punching tube 500 communicates with the first subspace 112 and the second subspace 114 . The second punching tube 600 communicates with the second subspace 114 and the second space 120 . Wherein, the first punching pipe 500 is not arranged parallel to the axis of the barrel 100, and the first space 110 is a sound-absorbing structure. The outer side of the second punching pipe 600 is provided with sound-absorbing rock wool, and the second space 120 has a resistive sound-absorbing structure, which combines resistive sound-absorbing and resistive sound-absorbing, broadens the sound-absorbing frequency range, and exhausts sound in the full frequency range , improve the muffler effect. The barrel 100 is provided with two first passages 130 connecting the first subspace 112 and the outside world. The two first passages 130 combine the air inlets into one, reducing the number of mufflers required, and are easy to install and reduce. Small footprint. The exhaust muffler 10 provided in the embodiment of the utility model has the beneficial effects of occupying a small space, being easy to install and improving the noise reduction effect.

The embodiment of the present utility model also provides an exhaust system, which includes an exhaust pipe and the above-mentioned exhaust muffler 10 ; Since the exhaust system includes the exhaust muffler 10 described above, it also has the beneficial effects of occupying a small space, being easy to install and improving the noise reduction effect.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A kind of 1. exhaust silencer, it is characterised in that including：

   Cylinder；

   The cylinder is divided into the first space being axially distributed along the cylinder and the second sky by first partition, the first partition Between；

   Second partition, the second partition first space is divided into along radially-arranged first subspace of the cylinder and Second subspace；

   First punching pipe, the first punching pipe connect first subspace and second subspace；

   Second punching pipe, the second punching pipe connect second subspace and the second space；

   Wherein, the axis of the first punching pipe and the cylinder is not parallel；Noise reduction rock is filled with the outside of the second punching pipe Cotton；

   Two connection first subspaces and extraneous first passage are provided with the cylinder, is additionally provided with the cylinder Connect the second space and extraneous second channel.
2. 2. exhaust silencer according to claim 1, it is characterised in that：

   The exhaust silencer also includes the 3rd dividing plate, the 3rd dividing plate by the second space be divided into the 3rd subspace and 4th subspace；The second punching pipe is located in the 3rd subspace, and is connected with the 4th subspace.
3. 3. exhaust silencer according to claim 2, it is characterised in that：

   The both ends of the second punching pipe are connected with first partition and the 3rd dividing plate respectively.
4. 4. exhaust silencer according to claim 2, it is characterised in that：

   The axis of the second punching pipe and the diameter parallel of the cylinder.
5. 5. exhaust silencer according to claim 4, it is characterised in that：

   The axis of the first punching pipe is vertical with the axis of the cylinder.
6. 6. exhaust silencer according to claim 1, it is characterised in that：

   The axial length of first subspace is less than the axial length of second subspace.
7. 7. exhaust silencer according to claim 2, it is characterised in that：

   Deflector is provided with first subspace, second subspace and the 4th subspace.
8. 8. exhaust silencer according to claim 2, it is characterised in that：

   The madial wall of first subspace, second subspace and the 4th subspace is provided with shrouding；It is described The madial wall of shrouding and the cylinder forms heat-insulation chamber.
9. 9. exhaust silencer according to claim 8, it is characterised in that：

   Noise elimination rock wool is filled with the heat-insulation chamber.
10. A kind of 10. gas extraction system, it is characterised in that：

    Exhaust silencer of the gas extraction system described in including blast pipe and claim 1 to 9 any one；The blast pipe The opening of one end connects with the air inlet pipe of the exhaust silencer.