Exhaust silencer and vehicle

Abstract

The utility model relates to the technical field of vehicles, and particularly discloses an exhaust silencer and a vehicle, the exhaust silencer comprises a shell with a silencing cavity, and the end face of the shell is provided with an exhaust port communicating with the silencing cavity; the silencing pipe assembly is arranged in the shell, one end of the silencing pipe assembly communicates with the silencing cavity, the other end of the silencing pipe assembly penetrates through the exhaust port and extends out of the shell, and the silencing pipe assembly at least comprises a resonance pipe section and an air outlet pipe section connected with one end of the resonance pipe section; the turbofan assembly is arranged in a pipe cavity, deviating from the air outlet pipe section, of the resonance pipe section, the turbofan assembly is configured to adjust the rotating speed of a blade fan in a self-adaptive mode along with changes of the flow speed of air flow in the pipe cavity, and the partition plates are arranged in the shell and divide the silencing cavity into a plurality of sub-cavities. The rotating speed of the turbofan assembly is automatically matched with the airflow pressure, the flow speed is adjusted in a self-adaptive mode, exhaust power loss is balanced, the problem that high-order noise is generated by exhaust under the high-rotating-speed and high-power working condition is effectively solved, and the NVH performance of a vehicle is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an exhaust muffler and a vehicle. BACKGROUND

[0002] For the engine of a hybrid or extended-range vehicle, the engine is often in a high-speed and high-power working condition. The conventional muffler is difficult to cope with the mid-high order noise caused by the high-speed and high-power working condition. Meanwhile, the mainstream solution of the existing muffler is to increase a passive valve in the muffler, control the exhaust flow by the valve opening of the passive valve, balance the exhaust power loss, and solve the low-frequency noise problem of the exhaust system. However, due to the characteristics of the passive valve, the passive valve produces abnormal sound when it is impacted by the exhaust flow from closing to opening. In addition, the spring is prone to fatigue after being subjected to the high-temperature and high-humidity exhaust environment for a long time, and abnormal sound is produced by the friction of the spring itself. Therefore, the NVH performance of the vehicle is reduced. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide an exhaust muffler and a vehicle to improve the technical problem that the exhaust muffler in the related art is difficult to cope with the mid-high order noise caused by the high-speed and high-power working condition, thereby reducing the NVH performance of the vehicle.

[0004] To achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application provides an exhaust muffler, comprising:

[0005] a housing with a sound attenuation chamber, an exhaust port of the housing being provided on an end face of the housing and communicating with the sound attenuation chamber;

[0006] a sound attenuation pipe assembly arranged in the housing, one end of the sound attenuation pipe assembly communicating with the sound attenuation chamber, and the other end of the sound attenuation pipe assembly extending to the outside of the housing through the exhaust port, wherein the sound attenuation pipe assembly at least comprises a resonance pipe section and an air outlet pipe section connected to one end of the resonance pipe section;

[0007] a turbofan assembly arranged in a pipe cavity of the resonance pipe section away from the air outlet pipe section, the turbofan assembly being configured to adaptively adjust the rotation speed of the fan according to the flow rate of the airflow in the pipe cavity.

[0008] In some embodiments, a partition plate arranged in the housing is further included, and the partition plate divides the sound attenuation chamber to form a plurality of sub-chambers.

[0009] In some embodiments, the partition plate comprises a first partition plate, a second partition plate and a third partition plate arranged in the sound attenuation chamber in a first direction, wherein the first partition plate, the second partition plate and the third partition plate divide the sound attenuation chamber to form a first chamber, a second chamber, a third chamber and a fourth chamber distributed in the first direction, and the first direction is the length direction of the sound attenuation chamber.

[0010] In some embodiments, the sound attenuation pipe assembly further comprises a first straight pipe section, a bent pipe section and a second straight pipe section, the bent pipe section is connected with the first straight pipe section and the second straight pipe section at two ends respectively, and the second straight pipe section is connected with the resonant pipe section at one end away from the bent pipe section.

[0011] In some embodiments, the bent pipe section is located in the fourth chamber, the first straight pipe section extends through the second chamber and the third chamber to communicate with the first chamber at one end away from the bent pipe section, and a first inner hole is formed in part of the surface of the second chamber where the first straight pipe section is located.

[0012] In some embodiments, a connecting pipe is further provided, one end of the connecting pipe communicates with the first chamber, and the other end of the connecting pipe extends through the second chamber and the third chamber to communicate with the fourth chamber in sequence, and a second inner hole is formed in part of the surface of the third chamber where the connecting pipe is located.

[0013] In some embodiments, an air inlet pipe is arranged in the second chamber and extends through the side wall of the shell to the outside of the shell, and the air inlet pipe is used to deliver engine exhaust to the second chamber.

[0014] In some embodiments, the turbofan assembly comprises a sleeve arranged in the pipe cavity of the resonant pipe section, a bracket connected with the inner side wall of the sleeve, and a fan arranged in the sleeve and rotationally connected with the bracket.

[0015] In some embodiments, the rotation axes of the resonant pipe section, the sleeve and the fan are coaxially arranged.

[0016] In the second aspect, the embodiments of the present application further provide a vehicle, which comprises the exhaust silencer as described in the above embodiments.

[0017] The one or more technical solutions described above in the embodiments of the present application have at least the following technical effects or advantages:

[0018] 1) The exhaust silencer provided by the present application, by arranging the sound attenuation pipe assembly in the exhaust silencer, the sound attenuation pipe assembly comprises a plurality of straight pipe sections and a resonant pipe section, wherein the turbofan assembly is embedded in the resonant pipe section, the rotation axis of the fan of the turbofan assembly is arranged in the same direction as the gas flow in the pipe cavity, when the flow rate of the gas flow in the pipe cavity changes, the rotation speed of the fan of the turbofan assembly automatically matches the pressure and flow rate of the gas flow for adaptive adjustment, balances the exhaust power loss, effectively solves the problem of high-order noise generated by exhaust under high-speed and high-power working conditions of the vehicle engine, and improves the NVH performance of the vehicle.

[0019] 2) The exhaust muffler of the present application further reduces noise by cooperating the turbofan assembly with the resonant pipe section, and by opening perforations in the second and third baffles and internal holes in the surface of the connecting pipe section, based on the principle of mutual cancellation of sound waves, and by gradually reducing the exhaust pressure and attenuating pressure pulsations by changing the direction of the exhaust flow, while the exhaust muffler of the present application eliminates the design of the conventional passive valve, thereby reducing the abnormal noise caused by the structure of the muffler itself.

[0020] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0022] Figure 1 is a structural schematic diagram of the exhaust muffler according to the embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of the inside of the exhaust muffler according to the embodiment of the present application;

[0024] Figure 3 is another structural schematic diagram of the inside of the exhaust muffler according to the embodiment of the present application;

[0025] Figure 4 is a structural schematic diagram of the exhaust muffler without the shell according to the embodiment of the present application;

[0026] Figure 5 is another structural schematic diagram of the exhaust muffler without the shell according to the embodiment of the present application;

[0027] Figure 6 is a structural schematic diagram of the resonant pipe section according to the embodiment of the present application;

[0028] Figure 7 is a structural schematic diagram of the turbofan assembly according to the embodiment of the present application;

[0029] Figure 8 is another structural schematic diagram of the turbofan assembly according to the embodiment of the present application.

[0030] Reference signs:

[0031] 10, exhaust muffler;

[0032] 100, housing; 110, sound attenuation chamber; 111, first chamber; 112, second chamber; 113, third chamber; 114, fourth chamber; 120, air inlet; 121, air inlet pipe; 130, air outlet;

[0033] 200, partition; 210, first partition; 220, second partition; 221, first perforation; 230, third partition; 231, second perforation;

[0034] 300, sound attenuation pipe assembly; 310, first straight pipe segment; 311, first inner hole; 320, elbow pipe segment; 330, second straight pipe segment; 340, resonant pipe segment; 350, air outlet pipe segment;

[0035] 400, turbofan assembly; 410, sleeve; 420, support; 421, shaft sleeve; 430, blade fan; 431, rotating shaft; 432, blade;

[0036] 500, connecting pipe; 510, second inner hole;

[0037] A, first direction. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, the embodiments described with reference to the accompanying drawings are exemplary, and it should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0039] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The meaning of "multiple" is at least two, that is, two and more than two; the meaning of "multiple" is at least two, that is, two and more than two.

[0040] In the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships; for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0043] Please refer to Figure 1 , Figure 2 and Figure 6 , the embodiment provides an exhaust muffler 10, which comprises a shell 100 with a sound attenuation chamber 110, and an exhaust port 130 is arranged on an end face of the shell 100 and communicates with the sound attenuation chamber 110; a sound attenuation pipe assembly 300 is arranged in the shell 100, one end of the sound attenuation pipe assembly 300 communicates with the sound attenuation chamber 110, and the other end extends out of the shell 100 through the exhaust port 130, wherein the sound attenuation pipe assembly 300 at least comprises a resonance pipe section 340 and an air outlet pipe section 350 connected with one end of the resonance pipe section 340; a turbofan assembly 400 is arranged in a pipe cavity of the resonance pipe section 340 away from the air outlet pipe section 350, and the turbofan assembly 400 is configured to adaptively adjust the rotating speed of the fan blades with the change of the flow rate of the airflow in the pipe cavity.

[0044] It should be noted that in the embodiment, the sound attenuation pipe assembly 300 arranged in the exhaust muffler 10 comprises a plurality of straight pipe sections and the resonance pipe section 340, wherein the turbofan assembly 400 is embedded in the resonance pipe section 340, the rotating shaft of the fan blades of the turbofan assembly 400 is arranged in the same direction as the gas flow in the pipe cavity, and when the flow rate of the airflow in the pipe cavity changes, the rotating speed of the fan blades of the turbofan assembly 400 is automatically matched with the airflow pressure and flow rate for adaptive adjustment, so as to balance the exhaust power loss, effectively solve the problem of high-order noise generated by exhaust under the condition of high rotating speed and large power of the vehicle engine, and improve the NVH performance of the vehicle.

[0045] In some embodiments, an air inlet 120 is arranged on the surface of the shell 100, the shell 100 has two opposite end plates, the sound attenuation chamber 110 is arranged in the shell 100 between the two end plates, the exhaust port 130 is arranged on one of the end faces, the air inlet 120 and the exhaust port 130 communicate with the sound attenuation chamber 110, for the convenience of description, the length direction of the shell 100 is defined as a first direction A, a partition plate 200 is arranged in the shell 100 along the first direction A, and the sound attenuation chamber 110 is divided into a plurality of chambers by the partition plate 200.

[0046] Optionally, the exhaust port 130 can be located at the left end wall of the first chamber 111 and communicate with the left end wall, and the air inlet 120 can be located at the side wall of the second chamber 112 and communicate with the side wall, and the air inlet pipe 121 is arranged at the air inlet 120, the air inlet pipe 121 is fixed to the second chamber 112 by the fixing plate, one end of the air inlet pipe 121 outside the shell 100 is connected with the vehicle exhaust equipment (engine), one end of the air inlet pipe 121 extends to the outside of the shell 100 through the side wall of the shell 100, and the air inlet pipe 121 is used to deliver the engine exhaust to the second chamber 112.

[0047] In some embodiments, the partition plate 200 includes a first partition plate 210, a second partition plate 220 and a third partition plate 230 which are arranged in the first direction A in the sound attenuation chamber 110, wherein the first partition plate 210, the second partition plate 220 and the third partition plate 230 divide the sound attenuation chamber 110 to form the first chamber 111, the second chamber 112, the third chamber 113 and the fourth chamber 114 which are distributed along the first direction A, and the first direction A is the length direction of the sound attenuation chamber 110.

[0048] In some embodiments, the sound attenuation pipe assembly 300 further includes a first straight pipe section 310, an elbow pipe section 320 and a second straight pipe section 330, the elbow pipe section 320 is connected with the first straight pipe section 310 and the second straight pipe section 330 at two ends respectively, the second straight pipe section 330 is connected with the resonance pipe section 340 at one end away from the elbow pipe section 320, the resonance pipe section 340 is connected with the air outlet pipe section 350 at one end away from the elbow pipe section 320, specifically, the elbow pipe section 320 is located in the fourth chamber 114, the first straight pipe section 310 extends to the first chamber 111 in sequence through the third chamber 113 and the second chamber 112 at one end away from the elbow pipe section 320, and the pipe section formed by the second straight pipe section 330, the resonance pipe section 340 and the air outlet pipe section 350 extends to the outside of the shell 100 from the air outlet through the third chamber 113, the second chamber 112 and the first chamber 111 in sequence.

[0049] In some embodiments, a connecting pipe 500 is further arranged in the sound attenuation chamber 110, one end of the connecting pipe 500 communicates with the first chamber 111, and the other end communicates with the second chamber 112, the third chamber 113 and the fourth chamber 114 in sequence, wherein a second inner hole 510 is arranged on part of the surface of the third chamber 113.

[0050] Please refer to Figure 4The first partition plate separates the first chamber 111 to be completely closed. The second partition plate 220 and the third partition plate 230 are respectively provided with a first perforation 221 and a second perforation 231. The first perforation 221 and the second perforation 231 can be arranged to be spaced apart on the surface of the second partition plate 220 and the third partition plate 230. The first perforation 221 connects the second chamber 112 and the third chamber 113. The second perforation 231 connects the third chamber 113 and the fourth chamber 114.

[0051] It should be noted that when the exhaust gas enters the second chamber from the air inlet, one of the gas flow directions is that the gas flows to the third chamber 113 through the first perforation 221, flows to the fourth chamber 114 from the third chamber 113 through the second perforation 231, flows to the first chamber 111 from the fourth chamber through the connecting pipe 500, and then flows out of the exhaust silencer 10 through the sound attenuation pipe assembly 300. The arrangement of the plurality of chambers can buffer the flow rate of the exhaust gas, slow down the flow fluctuation impact of the exhaust gas flow pulse, and achieve a certain noise reduction effect. On the other hand, by changing the exhaust flow direction, the exhaust pressure is gradually reduced and the pressure pulsation is attenuated, thereby reducing noise. In combination with the perforations arranged on the plurality of partition plates, the noise emitted by the exhaust gas is further reduced based on the principle of mutual cancellation of sound waves.

[0052] Optionally, the first partition plate 210, the second partition plate 220, and the third partition plate 230 can be provided with a flange, so that when the first partition plate 210, the second partition plate 220, and the third partition plate 230 are arranged in the sound attenuation chamber 110, the peripheral edges thereof can be completely connected and fixed to the inner side wall of the sound attenuation chamber 110.

[0053] Please refer to Figure 5 The first straight pipe section 310 is provided with a first inner hole 311 on part of the surface of the second chamber 112. The connecting pipe 500 is provided with a second inner hole 510 on part of the surface of the third chamber 113. When the gas flows into the first straight pipe section 310 from the first chamber 111, part of the exhaust gas flows to the second chamber 112 from the first inner hole 311 and collides with the original exhaust gas in the second chamber 112, and / or part of the exhaust gas flows to the first straight pipe section 310 from the second chamber 112 through the first inner hole 311 and collides with the original exhaust gas in the first straight pipe section 310. When the gas flows into the connecting pipe 500 from the fourth chamber 114, part of the exhaust gas flows to the third chamber 113 from the second inner hole 510 and collides with the original exhaust gas in the third chamber 113, and / or part of the exhaust gas flows to the connecting pipe 500 from the third chamber 113 through the second inner hole 510 and collides with the original exhaust gas in the connecting pipe 500, thereby reducing the exhaust gas speed and reducing the exhaust noise by gradually reducing the exhaust pressure and attenuating the pressure pulsation.

[0054] Please refer to Figure 6 to Figure 8The turbo-fan assembly 400 is arranged in the lumen of the resonance pipe section 340 away from the outlet pipe section 350, and the turbo-fan assembly 400 comprises a sleeve 410 arranged in the lumen of the resonance pipe section 340, a support 420 connected to the inner side wall of the sleeve 410, and a vane fan 430 arranged in the sleeve 410 and rotationally connected to the support 420, and the rotation axes of the lumen of the resonance pipe section 340, the sleeve 410 and the vane fan 430 are coaxially arranged.

[0055] Optionally, the support 420 can comprise a plurality of support rods connected to one end of the sleeve 410 and extending to the axial direction of the sleeve 410, and a sleeve 421 connected to the support rods at the axial position, the vane fan 430 comprises a rotating shaft 431 rotationally connected to the sleeve 421 and a vane 432 fixedly connected to one end of the rotating shaft 431, and the rotating shaft 431 of the vane fan is arranged in the lumen and distributed in the same direction as the gas flow, so that when the flow rate of the gas flow in the lumen changes, the rotating speed of the vane fan 430 is automatically matched with the pressure and flow rate of the gas flow for adaptive adjustment, the exhaust power loss is balanced, the high-order noise problem of the exhaust under the high-speed and high-power working condition of the vehicle engine is effectively solved, and the NVH performance of the vehicle is improved.

[0056] It should be noted that the exhaust muffler 10 in the above embodiment cancels the design of the conventional passive valve relative to the exhaust muffler in the prior art. The passive valve generates abnormal noise due to the impact of the exhaust gas flow from the closed to the open process, and the spring is prone to fatigue after being subjected to the high-temperature and high-humidity exhaust gas environment for a long time, and abnormal noise is generated by the friction thereof. The abnormal noise caused by the structure of the muffler itself can be reduced, the turbo-fan structure is adopted, the rotating speed of the turbine is adaptively adjusted according to the pressure and flow rate of the gas flow, the exhaust power loss is balanced, the high-order noise problem in the exhaust system is solved, and the space occupied by the exhaust muffler 10 is smaller.

[0057] In some embodiments, a vehicle is also provided, and the vehicle comprises the exhaust muffler 10 as described in the above embodiments.

[0058] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0059] In the description of the application, reference is made to descriptive terms such as "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example" or "some examples" meant to

[0060] It is apparent that the described embodiments are only some, but not all of the embodiments of the present application. Reference to "an embodiment" or "some embodiments" in the description means that a particular feature, structure, material or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment or to the same alternative embodiment.

[0061] Although the embodiments of the present application have been shown and described, it would be apparent to those having ordinary skill in the art that a number of changes, modifications, alternatives, and variations can be made to the embodiments without departing from the principles and the scope of the application, which is defined by the claims and their equivalents.

Claims

1. An exhaust silencer, characterized by, The exhaust silencer comprises: a housing having a sound attenuation chamber, the housing being provided with an exhaust port in communication with the sound attenuation chamber; a sound attenuation pipe assembly arranged in the housing, one end of the sound attenuation pipe assembly being in communication with the sound attenuation chamber and the other end of the sound attenuation pipe assembly extending out of the housing through the exhaust port, wherein the sound attenuation pipe assembly comprises at least a resonant pipe section and an outlet pipe section connected to one end of the resonant pipe section; a turbofan assembly arranged in a pipe cavity of the resonant pipe section away from the outlet pipe section, the turbofan assembly being configured to adaptively adjust a fan rotating speed according to a flow rate of air flow in the pipe cavity.

2. An exhaust silencer according to claim 1, characterised in that The exhaust silencer further comprises a partition plate arranged in the housing, the partition plate dividing the sound attenuation chamber into a plurality of sub-chambers.

3. An exhaust silencer according to claim 2, characterised in that The partition plate comprises a first partition plate, a second partition plate and a third partition plate arranged in the sound attenuation chamber in a first direction, wherein the first partition plate, the second partition plate and the third partition plate divide the sound attenuation chamber to form a first chamber, a second chamber, a third chamber and a fourth chamber distributed in the first direction, the first direction being a length direction of the sound attenuation chamber.

4. An exhaust silencer according to claim 3, characterised in that The sound attenuation pipe assembly further comprises a first straight pipe section, an elbow pipe section and a second straight pipe section, the elbow pipe section being connected to the first straight pipe section and the second straight pipe section at two ends thereof, and the second straight pipe section being connected to the resonant pipe section at one end thereof away from the elbow pipe section.

5. An exhaust silencer according to claim 4, characterised in that The elbow pipe section is located in the fourth chamber, and the first straight pipe section extends through the second chamber and the third chamber to the first chamber at one end thereof away from the elbow pipe section, wherein a first inner hole is formed in part of a surface of the second chamber where the first straight pipe section is located.

6. An exhaust silencer according to claim 3, wherein The exhaust silencer further comprises a connecting pipe, one end of the connecting pipe being in communication with the first chamber and the other end of the connecting pipe extending through the second chamber and the third chamber to the fourth chamber in sequence, wherein a second inner hole is formed in part of a surface of the third chamber where the connecting pipe is located.

7. An exhaust silencer according to claim 3, wherein The second chamber is provided with an air inlet pipe extending out of the housing at one end thereof through a side wall of the housing, the air inlet pipe being used to deliver engine exhaust to the second chamber.

8. An exhaust silencer according to any one of claims 1 to 7, characterised in that The turbofan assembly comprises a sleeve arranged in a pipe cavity of the resonant pipe section, a bracket connected to an inner side wall of the sleeve, and a fan arranged in the sleeve and rotationally connected to the bracket.

9. An exhaust silencer according to claim 8, characterised in that Rotation axes of the resonant pipe section, the sleeve and the fan are coaxially arranged.

10. A vehicle characterized by comprising: The vehicle comprises the exhaust silencer according to any one of claims 1-9.

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