Silencing device and vehicle

Abstract

The invention discloses a silencing device and a vehicle. The silencing device comprises an air inlet pipeline, an air outlet pipeline, a first pressure buffer chamber and an expansion pipeline which are used for being communicated with an air outlet of a pressure release valve. A first sliding assembly is slidably connected to the interior of the first pressure buffering chamber, the first sliding assembly divides the first pressure buffering chamber into a first chamber and a second chamber, and the first chamber communicates with the air inlet pipeline; the first sliding assembly faces the first connecting position and can be close to or away from the first connecting position to adjust the volume of the second cavity. The second cavity is filled with compressible gas; wherein the first connection position is a communication position of the first chamber and the air inlet pipeline; the two ends of the expansion pipeline communicate with the air inlet pipeline and the air outlet pipeline correspondingly, and the axis direction of the air inlet end of the expansion pipeline and the axis direction of the air inlet pipeline form an included angle with an opening facing the air outlet pipeline. The silencing device 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] At present, turbochargers are widely used in engines to increase the power and torque of the engine. When the accelerator is suddenly released during vehicle acceleration, the throttle valve is instantly closed, but due to inertia, the turbine still maintains a high-speed rotation state, and air continues to enter the intake pipe, causing the pressure in the intake pipe to rise rapidly. In order to release the high-pressure gas in time, an intake pressure relief valve needs to be installed in the intake pipe. However, installing an intake pressure relief valve will generate regenerative aerodynamic noise, which still cannot meet the noise reduction requirements. Summary of the invention

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

[0004] In order 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 inside 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 intake pipeline; the first sliding assembly faces a first connection position, and can be close 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 intake pipeline;

[0007] 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 and the axial direction of the air inlet pipeline form an angle with the opening facing the air outlet pipeline.

[0008] The above-mentioned silencer is used to control the pneumatic noise generated after the pressure relief valve is installed. The silencer includes an air inlet pipeline, an air outlet pipeline, a first pressure buffer chamber and an expansion pipeline. Among them, the air inlet pipeline is connected to the air release pipe of the air release valve; the first pressure buffer chamber is connected to the air inlet pipeline, and a first sliding component is arranged in the first pressure buffer chamber. The first sliding component divides the first pressure buffer chamber into a first chamber and a second chamber. The first chamber is connected to the air inlet pipeline, and the second chamber is a closed space, and the second chamber is filled with compressible gas. The first sliding component faces the connection between the first chamber and the air inlet pipeline, and can slide in the first pressure buffer chamber to increase or decrease the volume of the second chamber. One end of the expansion pipeline is connected to the air inlet pipeline, and the other end is connected to the air outlet pipeline, and the axial direction of the air inlet end of the expansion pipeline is at an acute angle to the axial direction of the air inlet pipeline.

[0009] During specific operation, when the vehicle suddenly releases the accelerator under heavy load conditions, the throttle valve closes instantly, the air release valve opens instantly, and the high-pressure airflow forms a high-speed jet. The high-pressure airflow enters the air release pipe through the air release valve, and then enters the air intake pipe of the muffler. After that, part of the high-speed airflow enters the first chamber of the first pressure buffer chamber, and the other part enters the expansion pipe, and is finally discharged from the air outlet pipe connected to the expansion pipe. By designing multiple passage structures connected to the air intake pipe, the front impact energy of the high-speed jet can be attenuated, thereby reducing noise. Then, the high-speed airflow entering the first chamber impacts the first sliding component, and the first sliding component moves in the direction away from the air intake pipe. At this time, the volume of the second chamber is reduced. Since the second chamber is filled with compressible gas (such as inert gas such as nitrogen), it acts as a damping element, and the kinetic energy of the high-speed airflow is converted into the internal energy of the compressible gas in the second chamber, so that the kinetic energy of the high-speed airflow is dissipated, and the jet shock wave is suppressed. At the same time, the sliding action of the first sliding component can also attenuate the pressure pulsation in the pipeline, inhibit the vortex motion caused by the airflow impacting the pipe wall in the pipeline, and thus reduce the noise. In addition, the setting of the expansion pipeline can also change the flow direction of part of the airflow, further reducing the airflow impact energy, so as to achieve the purpose of controlling the 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 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.

[0013] In some embodiments, the muffler device further includes a second pressure buffer chamber, a second sliding assembly is slidably connected inside the second pressure buffer chamber, 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 pipeline;

[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, for providing a force for the second movable plate to approach the second connection position.

[0016] In some embodiments, the muffler device further includes a gas hedging pipeline, the gas hedging pipeline runs through the gas outlet pipeline, and one end of the gas hedging pipeline is connected to the first expansion pipeline, and the other end of the gas hedging 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 pipeline, 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 pipeline.

[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 diagram of the structure of a muffler device provided in an embodiment of the present application;

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

[0023] Figure 3 A schematic diagram of the structure 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 schematic 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 pipeline; 2, air outlet pipeline; 3, first pressure buffer chamber; 31, first chamber; 32, second chamber; 4, expansion pipeline; 41, first expansion pipeline; 42, second expansion pipeline; 411, partition; 5, second pressure buffer chamber; 51, third chamber; 52, fourth chamber; 6, gas counter-pressure pipeline; 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 combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 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 as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0029] First, let me introduce the application scenario. At present, the engine uses a turbocharger to increase the power and torque of the engine. When the vehicle accelerates and the accelerator is suddenly released, the throttle is closed instantly. Due to inertia, the turbine still maintains a high-speed rotation state of more than tens of thousands of revolutions per minute, and air continues to enter the intake pipe, causing the pressure in the intake pipe to rise rapidly. In severe cases, it will cause damage to the throttle or rupture of the intake pipe. In addition, the high pressure ratio and low flow rate will cause the supercharger joint operation curve to run into the supercharger surge area, affecting the engine performance. In order to release the high-pressure gas in time, it is necessary to install a pressure relief device in the intake pipe 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, 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, and the sound waves are transmitted through the pressure waves, accompanied by large pressure pulsations, which produce a prominent dipole noise source. The size of the 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 the high-speed jet and the large energy generated by the pressure relief, the traditional muffler cannot meet the noise reduction needs well.

[0032] Based on the above problems, the present application provides a silencer device and a 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 requirements.

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

[0034] The first pressure buffer chamber 3 is slidably connected with a first sliding component 02, which divides the first pressure buffer chamber 3 into a first chamber 31 and a second chamber 32, wherein the first chamber 31 is connected to the air intake pipe 1; the first sliding component 02 faces the first connection position A, and can be close to or away from the first connection position A to adjust the volume of the second chamber 32; the second chamber 32 is filled with compressible gas; wherein the first connection position A is the connection point between the first chamber 31 and the air intake pipe 1;

[0035] The two ends of the expansion pipeline 4 are respectively connected to the air inlet pipeline 1 and the air outlet pipeline 2 , and 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 above-mentioned silencer is used to control the pneumatic noise generated after the pressure relief valve 01 is installed. The silencer includes an air intake line 1, an air outlet line 2, a first pressure buffer chamber 3 and an expansion line 4. Among them, the air intake line 1 is connected to the air release pipe of the air release valve 01; the first pressure buffer chamber 3 is connected to the air intake line 1, and a first sliding component 02 is provided in the first pressure buffer chamber 3. The first sliding component 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 air intake line 1, and the second chamber 32 is a closed space, and the second chamber 32 is filled with compressible gas. The first sliding component 02 faces the connection between the first chamber 31 and the air intake line 1, and can slide in 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 specific operation, when the vehicle suddenly releases the accelerator under heavy load conditions, the throttle valve is closed instantly, the air release valve 01 is opened instantly, and the high-pressure airflow forms a high-speed jet. The high-pressure airflow enters the air release pipe through the air release valve 01, and then enters the air intake pipe 1 of the muffler. After that, part of the high-speed airflow enters the first chamber 31 of the first pressure buffer chamber 3, and the other part enters the expansion pipe 4, and is finally discharged from the air outlet pipe 2 connected to the expansion pipe 4. By designing multiple passage structures connected to the air intake pipe 1, the front impact energy of the high-speed jet can be attenuated, thereby reducing noise. Then, the high-speed airflow entering the first chamber 31 impacts the first sliding component 02, and the first sliding component 02 moves in the direction away from the air intake pipe 1. At this time, the volume of the second chamber 32 is reduced. Since the second chamber 32 is filled with compressible gas (such as inert gas such as nitrogen), it acts as a damping element, and the kinetic energy of the high-speed airflow is converted into the internal energy of the compressible gas in the second chamber 32, so that the kinetic energy of the high-speed airflow is dissipated, and the jet shock wave is suppressed. At the same time, the sliding action of the first sliding component 02 can also attenuate the pressure pulsation in the pipeline, inhibit the vortex motion caused by the airflow impacting the pipe wall in the pipeline, and thus reduce the noise. In addition, the setting of the expansion pipeline 4 can also change the flow direction of part of the airflow, further reducing the airflow impact energy, so as to achieve the purpose of controlling the 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 intake pipeline 1 is the same as the axis of the first pressure buffer chamber 3. The axis of the expansion pipeline 4 and the axis of the air intake pipeline 1 form an angle with the opening facing the air outlet pipeline 2. It should be noted that the airflow entering the first cavity 31 will also be discharged through the expansion pipeline 4 and the air outlet pipeline 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 pneumatic 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, for providing a force for the first movable plate 021 to approach the first connection position A.

[0040] One possible way to achieve this is as follows: 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 is reduced. 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, so that the kinetic energy of the high-speed airflow is dissipated, and the jet shock wave is suppressed. At the same time, through the movement of the first movable plate 021, the pressure pulsation in the pipeline can be attenuated, and the vortex motion generated by the airflow impacting the pipe wall in the pipeline can be suppressed, thereby reducing the noise. Among them, 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 way to achieve this is as follows: Figure 1 As shown, the high-speed airflow passing through the air inlet pipeline 1 has three branches, one part enters the first chamber 31 of the first pressure buffer chamber 3, and the other part enters the first expansion pipeline 41 and the second expansion pipeline 42. The multiple passage structures can attenuate the front impact energy of the high-speed jet, thereby reducing noise. The first expansion pipeline 41 and the second expansion pipeline 42 are both connected to the air outlet pipeline 2, and are symmetrically distributed on both sides of the first pressure buffer chamber 3. Before the two airflows in the first expansion pipeline 41 and the second expansion pipeline 42 flow into the air outlet pipeline 2, a counteraction effect of the two airflows will be generated, 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 way to achieve this is as follows: Figure 1 and Figure 3 As shown, the expansion pipeline 4 adopts a silencer element based on the multi-stage expansion principle, and a plurality of partitions 411 arranged along the axial direction of the expansion pipeline 4 are designed to form a sudden contraction-expansion structure with spatial periodicity, that is, the caliber of any partition 411 close to the air inlet pipeline 1 is smaller than the caliber close to the air outlet pipeline 2. When the airflow passes through the partition 411, a pressure discontinuity surface will be 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 process. At the same time, the shape of the partition 411 can change the direction of the airflow, so that the airflow with changed direction interferes with the subsequent airflow, further reducing the gas impact energy, thereby reducing the noise.

[0045] In some embodiments, the muffler device further includes a second pressure buffer chamber 5, and a second sliding assembly 03 is slidably connected inside 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 pipeline 2;

[0046] The second sliding component 03 faces the second connection position B, and can be moved closer to or farther 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 way to achieve this is as follows: Figure 1 As shown, the second pressure buffer chamber 5 is connected to the gas outlet pipeline 2, and a second sliding component 03 is provided in the second pressure buffer chamber 5. The second sliding component 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 gas outlet pipeline 2. The third chamber 51 is a closed space, and the third chamber 51 is filled with compressible gas. The second sliding component 03 faces the connection between the fourth chamber 52 and the gas outlet pipeline 2, and can slide in 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 pipeline 41 and the second expansion pipeline 42 flow into the air outlet pipeline 2, the two airflows produce a counteraction effect, and the airflow after the counteraction will further be split, one part enters the air outlet pipeline 2, and the other part enters 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 air outlet pipeline 2. At this time, the volume of the third chamber 51 is reduced. Since the third chamber 51 is also filled with compressible gas, it acts as a damping element, and the kinetic energy of the airflow is converted into the internal energy of the compressible gas in the third chamber 51, so that the kinetic energy of the airflow is further dissipated, and the jet shock wave is further suppressed. 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, for providing a force for the second movable plate 031 to approach the second connection position B.

[0050] One possible way to achieve this is as follows: Figure 1 and Figure 2As shown, when the airflow hits 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, so that the energy of the airflow is further attenuated. Similarly, through the movement of the second movable plate 031, the pressure pulsation in the pipeline can be attenuated, and the vortex motion generated by the airflow hitting the pipe wall in the pipeline can be suppressed, which further plays a role in reducing noise. Among them, the second elastic member 032 can be a spring, etc.

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

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

[0053] One possible way to achieve this is as follows: Figure 1 and Figure 4 As shown, after the two airflows in the first expansion pipeline 41 and the second expansion pipeline 42 collide, they can enter the outlet pipeline 2 and the fourth chamber 52 respectively through the first through hole 61 to achieve further dissipation of airflow energy. The aperture of the first through hole 61 is smaller than the diameter of the expansion pipeline 4, the outlet pipeline 2 and the fourth chamber 52, that is, the change in the airflow cross-sectional area will also play a role in reducing noise.

[0054] In some embodiments, a rectifying structure 7 is disposed inside the air outlet pipeline 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 pipeline 2 .

[0055] One possible way to achieve this is as follows: Figure 1 and Figure 5 As shown, the rectifying structure 7 in the air 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 way to achieve this is as follows: 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 flow resistance and better realize the dissipation of airflow energy.

[0058] To summarize, according to the characteristics of the pneumatic noise source generated by the jet of the bleed valve, the present application designs an integrated silencer pipeline device. Through the interaction between the structure of the silencer device (pressure buffer chamber, expansion pipeline, airflow counter-attack pipeline, and rectification structure) and the airflow, as well as the counteraction between multiple airflows, the gas jet energy is attenuated, the airflow velocity is slowed down, and the four-stage sub-noise source (mainly controlled by the pressure buffer chamber, expansion pipeline, and airflow counter-attack 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 (mainly controlled by the pressure buffer chamber and the rectification structure) is avoided. Compared with traditional silencers, it meets the silencer requirements well.

[0059] In a second aspect, the embodiment of the present application provides a vehicle, including the muffler device of 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 can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also 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 and an expansion pipeline for communicating with the air outlet of the pressure relief valve; A first sliding assembly is slidably connected inside 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 intake pipeline; the first sliding assembly faces a first connection position, and can be close 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 intake pipeline; 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 and the axial direction of the air inlet pipeline form an angle with the opening facing the air outlet 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 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.

4. The muffler device according to claim 3, characterized in that: A plurality of partitions are arranged 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 4, characterized in that: The muffler device further comprises a second pressure buffer chamber, wherein a second sliding assembly is slidably connected inside 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 communicated with the air outlet pipeline; 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.

6. The muffler device according to claim 5, 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, for providing a force for the second movable plate to approach the second connection position.

7. The muffler device according to claim 6, characterized in that: The muffler device further includes a gas counter-pressure pipeline, which runs through the gas outlet pipeline and is connected to the first expansion pipeline at one end and the second expansion pipeline at the other end; 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.

8. The muffler device according to claim 1, characterized in that: A rectification structure is provided inside the air outlet pipeline, 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 pipeline.

9. The muffler device according to claim 6, 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.

10. A vehicle, characterized in that: Comprising a silencer as described in any one of claims 1 to 9.

Images