Noise reduction device and vehicle

Abstract

The present application discloses a silencer device and a vehicle. The silencer device includes an air inlet pipe, an air outlet pipe, a first pressure buffer chamber and an expansion pipe for communicating with the air outlet of the pressure relief valve; a first sliding assembly is slidably connected to the interior of the first pressure buffer chamber, and the first sliding assembly divides the first pressure buffer chamber into a first chamber and a second chamber, and the first chamber is connected to the air inlet pipe; the first sliding assembly faces the first connection position and can move closer to or away from the first connection position to adjust the volume of the second chamber; the second chamber is filled with compressible gas; wherein the first connection position is the connection point between the first chamber and the air inlet pipe; the two ends of the expansion pipe are respectively connected to the air inlet pipe and the air outlet pipe, and the axial direction of the air inlet end of the expansion pipe forms an angle with the opening facing the air outlet pipe with the axial direction of the air inlet pipe. The silencer device of the present application can achieve the purpose of controlling noise.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a muffler device and a vehicle. Background Art

[0002] Turbochargers are widely used in current engines to increase power and torque. When the accelerator is suddenly released during acceleration, the throttle valve closes instantly. However, due to inertia, the turbine continues to spin at high speed, allowing air to continue entering the intake manifold, causing pressure to rise rapidly. To release the high-pressure gas promptly, an intake pressure relief valve is required. However, installing an intake pressure relief valve generates regenerative aerodynamic noise, which still fails to meet the required noise reduction requirements. Summary of the Invention

[0003] The present application discloses a noise reduction device and a vehicle, which can achieve the purpose of controlling noise.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] In a first aspect, the present application provides a muffler device comprising an air inlet pipeline, an air outlet pipeline, a first pressure buffer chamber, and an expansion pipeline for communicating with an air outlet of a pressure relief valve;

[0006] A first sliding assembly is slidably connected to the interior of the first pressure buffer chamber, the first sliding assembly dividing the first pressure buffer chamber into a first chamber and a second chamber, the first chamber being in communication with the intake pipe; the first sliding assembly is oriented toward a first connection position and can be moved closer to or further away from the first connection position to adjust the volume of the second chamber; the second chamber is filled with compressible gas; wherein the first connection position is the connection point between the first chamber and the intake pipe;

[0007] The two ends of the expansion pipeline are respectively connected to the air inlet pipeline and the air outlet pipeline. The axial direction of the air inlet end of the expansion pipeline and the axial direction of the air inlet pipeline form an angle with the opening facing the air outlet pipeline.

[0008] The silencer is used to control the aerodynamic noise generated by the installation of a pressure relief valve. The silencer includes an inlet line, an outlet line, a first pressure buffer chamber, and an expansion line. The inlet line is connected to the relief pipe of the relief valve; the first pressure buffer chamber is connected to the inlet line, and a first sliding assembly is provided within the first pressure buffer chamber. The first sliding assembly divides the first pressure buffer chamber into a first chamber and a second chamber. The first chamber is connected to the inlet line, and the second chamber is a closed space filled with compressible gas. The first sliding assembly faces the connection between the first chamber and the inlet line and can slide within the first pressure buffer chamber to increase or decrease the volume of the second chamber. The expansion line is connected to the inlet line at one end and to the outlet line at the other end, and the axial direction of the inlet end of the expansion line forms an acute angle with the axial direction of the inlet line.

[0009] During operation, when the vehicle suddenly releases the accelerator under heavy load, the throttle valve instantly closes and the bleed valve instantly opens. High-pressure airflow forms a high-speed jet, which then flows through the bleed valve into the bleed pipe and into the muffler's intake duct. A portion of the high-speed airflow then enters the first chamber of the first pressure buffer chamber, while the remainder enters the expansion duct, ultimately exiting through the outlet duct connected to the expansion duct. By designing multiple pathways connected to the intake duct, the frontal impact energy of the high-speed jet can be attenuated, thereby reducing noise. The high-speed airflow entering the first chamber then impacts the first sliding assembly, causing it to move away from the intake duct. This reduces the volume of the second chamber. Because the second chamber is filled with a compressible gas (such as an inert gas like nitrogen), it acts as a damping element, converting the kinetic energy of the high-speed airflow into the internal energy of the compressible gas in the second chamber. This dissipates the kinetic energy of the high-speed airflow and suppresses the jet shock wave. The sliding action of the first sliding assembly also dampens pressure pulsations within the pipeline, suppressing vortex motion caused by airflow impacting the pipe wall, thereby reducing noise. Furthermore, the expansion pipe redirects part of the airflow, further reducing the impact energy and ultimately controlling jet aerodynamic noise.

[0010] In some embodiments, the first sliding assembly includes a first movable plate and a first elastic member, one end of the first elastic member is connected to the first movable plate, and the other end is connected to the inner wall of the second chamber, for providing a force for the first movable plate to approach the first connection position.

[0011] In some embodiments, the expansion pipeline includes a first expansion pipeline and a second expansion pipeline, and the first expansion pipeline and the second expansion pipeline are symmetrically arranged on both sides of the first pressure buffer chamber.

[0012] In some embodiments, a plurality of baffles are provided inside the expansion pipeline, and the plurality of baffles are arranged along the axial direction of the expansion pipeline; any one of the baffles is in a trumpet shape with its opening facing the air outlet pipeline.

[0013] In some embodiments, the muffler device further includes a second pressure buffer chamber, wherein a second sliding assembly is slidably connected to the interior of the second pressure buffer chamber, and the second sliding assembly divides the second pressure buffer chamber into a third chamber and a fourth chamber, and the fourth chamber is connected to the air outlet pipe;

[0014] The second sliding assembly faces the second connection position and can move closer to or farther away from the second connection position to adjust the volume of the third chamber; the third chamber is filled with compressible gas; wherein the second connection position is the connection point between the fourth chamber and the air outlet pipe.

[0015] In some embodiments, the second sliding assembly includes a second movable plate and a second elastic member, one end of the second elastic member is connected to the second movable plate, and the other end is connected to the inner wall of the third chamber, used to provide a force for the second movable plate to approach the second connection position.

[0016] In some embodiments, the muffler device further includes a gas counter-flow pipeline, the gas counter-flow pipeline passes through the gas outlet pipeline, and one end of the gas counter-flow pipeline is connected to the first expansion pipeline, and the other end of the gas counter-flow pipeline is connected to the second expansion pipeline;

[0017] The gas hedging pipeline is provided with a plurality of first through holes on the tube wall inside the gas outlet pipeline, the fourth chamber is connected with the gas outlet pipeline through the first through holes, and the plurality of first through holes are evenly arranged around the tube wall of the gas hedging pipeline.

[0018] In some embodiments, a rectification structure is provided inside the air outlet pipe, and the rectification structure includes a plurality of second through holes parallel to each other, and the axes of the second through holes are parallel to the axis of the air outlet pipe.

[0019] In some embodiments, a first limiting structure is further provided inside the first pressure buffer chamber, and the first limiting structure is located on the side of the first movable plate away from the second chamber, and is used to limit the maximum volume of the second chamber; a second limiting structure is further provided inside the second pressure buffer chamber, and the second limiting structure is located on the side of the second movable plate away from the third chamber, and is used to limit the maximum volume of the third chamber.

[0020] In a second aspect, the present application provides a vehicle comprising the silencer device as described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a noise reduction device provided in an embodiment of the present application;

[0022] Figure 2 A schematic structural diagram of a pressure buffer chamber provided in an embodiment of the present application;

[0023] Figure 3 A schematic structural diagram of an expansion pipeline provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of a gas hedging pipeline provided in an embodiment of the present application;

[0025] Figure 5 A structural diagram of a rectifier structure provided in an embodiment of the present application;

[0026] Icons: 01, pressure relief valve; 02, first sliding assembly; 021, first movable plate; 022, first elastic member; 03, second sliding assembly; 031, second movable plate; 032, second elastic member; 04, first limiting structure; 05, second limiting structure; 1, air inlet pipe; 2, air outlet pipe; 3, first pressure buffer chamber; 31, first chamber; 32, second chamber; 4, expansion pipe; 41, first expansion pipe; 42, second expansion pipe; 411, partition; 5, second pressure buffer chamber; 51, third chamber; 52, fourth chamber; 6, gas counter-pressure pipe; 61, first through hole; 7, rectification structure; 71, second through hole; A, first connection position; B, second connection position. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0029] First, let's introduce the application scenarios. Currently, engines use turbochargers to increase engine power and torque. When the vehicle accelerates and the accelerator is suddenly released, the throttle valve closes instantly. Due to inertia, the turbine continues to rotate at a high speed of over tens of thousands of revolutions per minute. Air continues to enter the intake manifold, causing the pressure in the intake manifold to rise rapidly. In severe cases, it can cause damage to the throttle valve or rupture the intake manifold. In addition, the high pressure ratio and low flow rate can cause the supercharger joint operating curve to run into the supercharger surge region, affecting engine performance. In order to release the high-pressure gas in a timely manner, it is necessary to install a pressure relief device in the intake duct to release the high-pressure gas to the low-pressure end.

[0030] However, installing a pressure relief valve in the intake duct will generate regenerative aerodynamic noise. When the throttle is suddenly released, the relief valve opens. At the moment the relief valve is fully opened, high-pressure gas is released to form a high-speed jet. The essence of the jet is a supersonic, under-expanded, and unsteady jet process, which will produce a prominent quadrupole noise source. In addition, the jet impacts the pipe wall, causing a large vortex motion in the pipe, intensifying the turbulence phenomenon. The sound waves are transmitted through the pressure waves, accompanied by large pressure pulsations, generating a prominent dipole noise source. The amount of aerodynamic noise generated by the jet is related to the speed of the airflow and the turbulent motion conditions in the pipe. The greater the airflow speed and the more intense the turbulence, the greater the noise.

[0031] The current common solution is to install multiple traditional mufflers in the intake system to achieve noise reduction control. However, due to the wide frequency band range generated by high-speed jets and the large energy generated by the instantaneous pressure relief, traditional mufflers cannot meet the noise reduction requirements well.

[0032] Based on the above problems, this application provides a silencer device and vehicle according to the characteristics of the noise source generated by the exhaust valve jet, which can reduce the air flow velocity in the pipeline and suppress the turbulence level in the pipeline, thereby achieving the purpose of controlling noise and can well meet the silencer needs.

[0033] First, as Figure 1-Figure 5 As shown, the embodiment of the present application provides a muffler device, comprising an air inlet pipe 1 for communicating with the air outlet of the pressure relief valve 01, an air outlet pipe 2, a first pressure buffer chamber 3 and an expansion pipe 4;

[0034] A first sliding assembly 02 is slidably connected to the interior of the first pressure buffer chamber 3. The first sliding assembly 02 divides the first pressure buffer chamber 3 into a first chamber 31 and a second chamber 32. The first chamber 31 is connected to the intake pipe 1. The first sliding assembly 02 faces the first connection position A and can move closer to or farther from the first connection position A to adjust the volume of the second chamber 32. The second chamber 32 is filled with compressible gas. The first connection position A is the connection point between the first chamber 31 and the intake pipe 1.

[0035] The two ends of the expansion pipeline 4 are connected to the air inlet pipeline 1 and the air outlet pipeline 2 respectively. The axial direction of the air inlet end of the expansion pipeline 4 and the axial direction of the air inlet pipeline 1 form an angle with the opening facing the air outlet pipeline 2.

[0036] The silencer is used to control the aerodynamic noise generated by the installation of a pressure relief valve 01. The silencer comprises an intake line 1, an outlet line 2, a first pressure buffer chamber 3, and an expansion line 4. The intake line 1 is connected to the relief pipe of the relief valve 01; the first pressure buffer chamber 3 is connected to the intake line 1, and a first sliding assembly 02 is provided within the first pressure buffer chamber 3. The first sliding assembly 02 divides the first pressure buffer chamber 3 into a first chamber 31 and a second chamber 32. The first chamber 31 is connected to the intake line 1, while the second chamber 32 is a closed space filled with compressible gas. The first sliding assembly 02 faces the connection between the first chamber 31 and the intake line 1 and can slide within the first pressure buffer chamber 3 to increase or decrease the volume of the second chamber 32. One end of the expansion pipeline 4 is connected to the air inlet pipeline 1 , and the other end is connected to the air outlet pipeline 2 , and the axial direction of the air inlet end of the expansion pipeline 4 forms an acute angle with the axial direction of the air inlet pipeline 1 .

[0037] During operation, when the vehicle suddenly releases the accelerator under heavy load, the throttle valve instantly closes and the air release valve 01 instantly opens. High-pressure airflow forms a high-speed jet, which passes through the air release valve 01 and enters the air release duct, then enters the muffler's intake line 1. A portion of the high-speed airflow then enters the first chamber 31 of the first pressure buffer chamber 3, while the remainder enters the expansion line 4, ultimately exiting through the outlet line 2 connected to the expansion line 4. By designing multiple pathways connected to the intake line 1, the frontal impact energy of the high-speed jet is attenuated, thereby reducing noise. The high-speed airflow entering the first chamber 31 then impacts the first sliding assembly 02, causing it to move away from the intake line 1. This reduces the volume of the second chamber 32. Because the second chamber 32 is filled with a compressible gas (such as an inert gas like nitrogen), it acts as a damping element, converting the kinetic energy of the high-speed airflow into the internal energy of the compressible gas within the second chamber 32. This dissipates the kinetic energy of the high-speed airflow and suppresses the jet shock wave. The sliding action of the first sliding assembly 02 also dampens pressure pulsations within the pipeline, suppressing vortex motion caused by airflow impacting the pipe wall, thereby reducing noise. Furthermore, the provision of the expansion pipe 4 can redirect part of the airflow, further reducing the impact energy and ultimately controlling jet aerodynamic noise.

[0038] like Figure 1 As shown, the cross-section of the first pressure buffer chamber 3 of the embodiment of the present application is approximately rectangular, and the axis of the air inlet pipe 1 is the same as the axis of the first pressure buffer chamber 3. The axis of the expansion pipe 4 and the axis of the air inlet pipe 1 form an angle with the opening facing the air outlet pipe 2. It should be noted that the airflow entering the first cavity 31 will also be discharged through the expansion pipe 4 and the air outlet pipe 2 after the energy is dissipated. The present application realizes the conversion of high-pressure and high-speed airflow to low-pressure and low-speed airflow, and realizes the control of the aerodynamic noise generated by the pressure relief valve 01.

[0039] In some embodiments, the first sliding assembly 02 includes a first movable plate 021 and a first elastic member 022, one end of the first elastic member 022 is connected to the first movable plate 021, and the other end is connected to the inner wall of the second chamber 32, used to provide a force for the first movable plate 021 to approach the first connection position A.

[0040] One possible implementation method is Figure 1 and Figure 2As shown, when the high-speed airflow impacts the first movable plate 021, the first movable plate 021 overcomes the elastic force of the first elastic member 022 and moves to the right. At this time, the volume of the second chamber 32 decreases. The second chamber 32 is filled with compressible gas, which acts as a damping element. The kinetic energy of the high-speed airflow is converted into the internal energy of the compressible gas in the second chamber 32, causing the kinetic energy of the high-speed airflow to be dissipated, thereby suppressing the jet shock wave. At the same time, the movement of the first movable plate 021 can attenuate pressure pulsations within the pipeline, suppress the vortex motion caused by the airflow impacting the pipe wall, and thus reduce noise. The first elastic member 022 can be a spring, etc.

[0041] In some embodiments, the expansion pipeline 4 includes a first expansion pipeline 41 and a second expansion pipeline 41 , and the first expansion pipeline 41 and the second expansion pipeline 42 are symmetrically arranged on both sides of the first pressure buffer chamber 3 .

[0042] One possible implementation method is Figure 1 As shown, the high-speed airflow passing through the intake pipe 1 has three branches: one portion enters the first chamber 31 of the first pressure buffer chamber 3, and the other portion enters the first expansion pipe 41 and the second expansion pipe 42. This multi-pathway structure can attenuate the frontal impact energy of the high-speed jet, thereby reducing noise. The first expansion pipe 41 and the second expansion pipe 42 are both connected to the outlet pipe 2 and are symmetrically distributed on either side of the first pressure buffer chamber 3. Before the two airflows in the first expansion pipe 41 and the second expansion pipe 42 flow into the outlet pipe 2, they produce a counteraction effect, further dissipating the impact energy of the airflow, thereby further reducing noise.

[0043] In some embodiments, a plurality of partitions 411 are provided inside the expansion pipeline 4 , and the plurality of partitions 411 are arranged along the axial direction of the expansion pipeline 4 ; any one of the partitions 411 is in a trumpet shape with its opening facing the air outlet pipeline.

[0044] One possible implementation method is Figure 1 and Figure 3 As shown, the expansion line 4 adopts a silencer element based on the multi-stage expansion principle, and is designed with a plurality of partitions 411 arranged along the axial direction of the expansion line 4, forming a sudden contraction-expansion structure with spatial periodicity, that is, the diameter of any partition 411 close to the air inlet line 1 is smaller than the diameter close to the air outlet line 2. When the airflow passes through the partition 411, a pressure discontinuity surface is formed, which reduces the total pressure of the airflow passing through. The partition 411 is in the shape of a trumpet, and the inner surface has a certain slope, which can prevent the airflow from generating shock waves during the flow. At the same time, the shape of the partition 411 can change the direction of the airflow, so that the airflow that changes direction interferes with the subsequent airflow, further reducing the gas impact energy, thereby reducing noise.

[0045] In some embodiments, the muffler device further includes a second pressure buffer chamber 5, wherein a second sliding assembly 03 is slidably connected to the interior of the second pressure buffer chamber 5, and the second sliding assembly 03 divides the second pressure buffer chamber 5 into a third chamber 51 and a fourth chamber 52, and the fourth chamber 52 is connected to the air outlet pipe 2;

[0046] The second sliding component 03 faces the second connection position B and can move closer to or away from the second connection position B to adjust the volume of the third chamber 51; the third chamber 51 is filled with compressible gas; wherein the second connection position B is the connection point between the fourth chamber 52 and the air outlet pipe 2.

[0047] One possible implementation method is Figure 1 As shown, the second pressure buffer chamber 5 is connected to the outlet pipe 2. A second sliding assembly 03 is installed in the second pressure buffer chamber 5. The second sliding assembly 03 divides the second pressure buffer chamber 5 into a third chamber 51 and a fourth chamber 52. The fourth chamber 52 is connected to the outlet pipe 2. The third chamber 51 is a closed space and is filled with compressible gas. The second sliding assembly 03 faces the connection between the fourth chamber 52 and the outlet pipe 2 and can slide within the second pressure buffer chamber 5 to increase or decrease the volume of the third chamber 51.

[0048] During specific operation, before the two airflows in the first expansion line 41 and the second expansion line 42 flow into the outlet line 2, the two airflows produce a counteraction effect. After the counteraction, the airflow will further split, with one part entering the outlet line 2 and the other part entering the fourth cavity 52. ​​The airflow entering the fourth cavity 52 impacts the second sliding component 03, and the second sliding component 03 moves in the direction away from the outlet line 2. At this time, the volume of the third chamber 51 decreases. Since the third chamber 51 is also filled with compressible gas, it acts as a damping element. The kinetic energy of the airflow is converted into the internal energy of the compressible gas in the third chamber 51, causing the kinetic energy of the airflow to be further dissipated and further suppressing the jet shock wave. At the same time, the sliding action of the second sliding component 03 can also attenuate the pressure pulsation in the pipeline, suppress the vortex motion in the pipeline caused by the airflow impacting the pipe wall, and further reduce noise.

[0049] In some embodiments, the second sliding assembly 03 includes a second movable plate 031 and a second elastic member 032, one end of the second elastic member 032 is connected to the second movable plate 031, and the other end is connected to the inner wall of the third chamber 51, used to provide a force for the second movable plate 031 to approach the second connection position B.

[0050] One possible implementation method is Figure 1 and Figure 2As shown, when the airflow impacts the second movable plate 031, the second movable plate 031 overcomes the elastic force of the second elastic member 032 and moves to the left. At this time, the volume of the third chamber 51 decreases. The third chamber 51 is filled with compressible gas, which acts as a damping element. The kinetic energy of the airflow is converted into the internal energy of the compressible gas in the third chamber 51, which further attenuates the energy of the airflow. Similarly, the movement of the second movable plate 031 can attenuate pressure pulsations in the pipeline, suppress the vortex motion generated by the airflow impacting the pipe wall, and further reduce noise. The second elastic member 032 can be a spring, etc.

[0051] In some embodiments, the silencer device further includes a gas counter-pressure pipe 6 , which passes through the gas outlet pipe 2 , and one end of the gas counter-pressure pipe 6 is connected to the first expansion pipe 41 , and the other end of the gas counter-pressure pipe 6 is connected to the second expansion pipe 42 ;

[0052] The gas hedging pipeline 6 is located in the outlet pipeline 2 and has multiple first through holes 61 on its wall. The fourth chamber 52 is connected to the outlet pipeline 2 through the first through holes 61. The multiple first through holes 61 are evenly arranged around the wall of the gas hedging pipeline 6.

[0053] One possible implementation method is Figure 1 and Figure 4 As shown, after the two airflows in the first expansion line 41 and the second expansion line 42 collide, they can enter the outlet line 2 and the fourth chamber 52 respectively through the first through hole 61, thereby further dissipating the airflow energy. The aperture of the first through hole 61 is smaller than the diameters of the expansion line 4, the outlet line 2, and the fourth chamber 52. In other words, the change in the airflow cross-sectional area also has the effect of reducing noise.

[0054] In some embodiments, a rectifying structure 7 is provided inside the air outlet pipe 2 . The rectifying structure 7 includes a plurality of second through holes 71 that are parallel to each other. The axes of the second through holes 71 are parallel to the axis of the air outlet pipe 2 .

[0055] One possible implementation method is Figure 1 and Figure 5 As shown, the rectifying structure 7 in the outlet pipe 4 has a plurality of parallel second through holes 71, so that the low-speed and low-pressure gas flows out uniformly in a laminar state through the rectifying structure 7, which can suppress the generation of turbulence in the pipe and further reduce noise.

[0056] In some embodiments, a first limiting structure 04 is further provided inside the first pressure buffer chamber 3, and the first limiting structure 04 is located on the side of the first movable plate 021 away from the second chamber 32, and is used to limit the maximum volume of the second chamber 32; a second limiting structure 05 is further provided inside the second pressure buffer chamber 5, and the second limiting structure 05 is located on the side of the second movable plate 031 away from the third chamber 51, and is used to limit the maximum volume of the third chamber 51.

[0057] One possible implementation method is Figure 1 and Figure 2 As shown, the setting of the first limiting structure 04 and the second limiting structure 05 can limit the maximum volume of the second chamber 32 and the third chamber 51, and can also make the first elastic member 022 and the second elastic member 032 have an initial pre-tightening force, which is beneficial to increase the airflow resistance and better realize the dissipation of airflow energy.

[0058] To summarize, this application designs an integrated silencer piping device based on the characteristics of the aerodynamic noise source generated by the bleed valve jet. Through the interaction between the structure of the silencer device (pressure buffer chamber, expansion pipeline, airflow counter-flow pipeline, and rectification structure) and the airflow, as well as the counter-flow effect between multiple airflows, the gas jet energy is attenuated, the airflow velocity is slowed down, and the fourth-level sub-noise source (mainly controlled by the pressure buffer chamber, expansion pipeline, and airflow counter-flow pipeline) is controlled; at the same time, the intensification of turbulent motion in the pipeline is suppressed, and the dipole noise source generated by vortex motion is avoided (mainly controlled by the pressure buffer chamber and the rectification structure). Compared with traditional silencers, it meets the silencer requirements very well.

[0059] In a second aspect, an embodiment of the present application provides a vehicle including the muffler device according to the first aspect. Since the vehicle includes all the technical features of the muffler device, the vehicle also includes all the beneficial effects of the muffler device, which will not be described in detail here.

[0060] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A muffler, characterized in that: It includes an air inlet pipeline, an air outlet pipeline, a first pressure buffer chamber, an expansion pipeline, a second pressure buffer chamber and a gas hedging pipeline for communicating with the air outlet of the pressure relief valve; A first sliding assembly is slidably connected to the interior of the first pressure buffer chamber, the first sliding assembly dividing the first pressure buffer chamber into a first chamber and a second chamber, the first chamber being in communication with the intake pipe; the first sliding assembly is oriented toward a first connection position and can be moved closer to or further away from the first connection position to adjust the volume of the second chamber; the second chamber is filled with compressible gas; wherein the first connection position is the connection point between the first chamber and the intake pipe; The two ends of the expansion pipeline are respectively connected to the air inlet pipeline and the air outlet pipeline, and the axial direction of the air inlet end of the expansion pipeline forms an angle with the axial direction of the air inlet pipeline, with the opening facing the air outlet pipeline; the expansion pipeline includes a first expansion pipeline and a second expansion pipeline; A second sliding assembly is slidably connected to the interior of the second pressure buffer chamber, and the second sliding assembly divides the second pressure buffer chamber into a third chamber and a fourth chamber, and the fourth chamber is connected to the gas outlet pipeline; the second sliding assembly is oriented toward a second connection position and can move closer to or farther from the second connection position to adjust the volume of the third chamber; the third chamber is filled with compressible gas; wherein the second connection position is the connection point between the fourth chamber and the gas outlet pipeline; The gas hedging pipeline runs through the gas outlet pipeline, and one end is connected to the first expansion pipeline, and the other end is connected to the second expansion pipeline; the gas hedging pipeline is located in the gas outlet pipeline and is provided with a plurality of first through holes on the tube wall, the fourth chamber is connected to the gas outlet pipeline through the first through holes, and the plurality of first through holes are evenly arranged around the tube wall of the gas hedging pipeline.

2. The muffler device according to claim 1, characterized in that: The first sliding assembly includes a first movable plate and a first elastic member, one end of the first elastic member is connected to the first movable plate, and the other end is connected to the inner wall of the second chamber, for providing a force for the first movable plate to approach the first connection position.

3. The muffler device according to claim 2, characterized in that: The first expansion pipeline and the second expansion pipeline are symmetrically arranged on both sides of the first pressure buffer chamber.

4. The muffler device according to claim 3, characterized in that: A plurality of partitions are provided inside the expansion pipeline, and the plurality of partitions are arranged along the axial direction of the expansion pipeline; any one of the partitions is in a trumpet shape with its opening facing the air outlet pipeline.

5. The muffler device according to claim 2, characterized in that: The second sliding assembly includes a second movable plate and a second elastic member, one end of the second elastic member is connected to the second movable plate, and the other end is connected to the inner wall of the third chamber, used to provide a force for the second movable plate to approach the second connection position.

6. The muffler device according to claim 1, characterized in that: A rectification structure is provided inside the air outlet pipeline. The rectification structure includes a plurality of second through holes parallel to each other. The axes of the second through holes are parallel to the axis of the air outlet pipeline.

7. The muffler device according to claim 5, characterized in that: A first limiting structure is also provided inside the first pressure buffer chamber. The first limiting structure is located on the side of the first movable plate away from the second chamber and is used to limit the maximum volume of the second chamber. A second limiting structure is also provided inside the second pressure buffer chamber. The second limiting structure is located on the side of the second movable plate away from the third chamber and is used to limit the maximum volume of the third chamber.

8. A vehicle, characterized in that: The utility model comprises a noise reduction device as described in any one of claims 1 to 7.

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