Silencing device, engine exhaust system, silencing method and medium

Abstract

The invention relates to a silencing device, an engine exhaust system, a silencing method and a computer readable storage medium, and the silencing device comprises a barrel body which is provided with an air inlet and an air outlet which are arranged at an interval in the axis direction; the separation assembly is arranged in an airflow flowing path in the cylinder body; the rotating assembly is attached to the separating assembly and can rotate relative to the separating assembly; a first hole is formed in the surface of the separation assembly, a second hole is formed in the surface of the rotating assembly, the part, exposed relative to the first hole, of the second hole forms a silencing part, and airflow flows from the air inlet to the air outlet through the silencing part; the second hole is configured to move relative to the first hole along with rotation of the rotating assembly, so that the shape of the section, allowing airflow to pass through, of the silencing part is changed, and the area of the section is not changed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of noise control, and in particular to a muffler device, an engine exhaust system, a muffler method, and a computer-readable storage medium. Background Art

[0002] A muffler is a device that blocks sound transmission but allows airflow. It is often installed in the airflow channel of power equipment or in the intake and exhaust system, and can effectively reduce ventilation noise. In the engine exhaust system, the design of the muffler should not only reduce noise, but also consider the impact of exhaust back pressure on engine performance.

[0003] The passive muffler in the related art has limitations in dealing with exhaust noise under different working conditions due to its fixed internal structure, and can only eliminate noise in a certain frequency band. In particular, when the engine speed and load change frequently, its exhaust noise and exhaust back pressure also change accordingly. Traditional mufflers are often difficult to cope with and it is difficult to strike a balance between maintaining the optimal exhaust back pressure and efficient noise control. Summary of the invention

[0004] In view of this, the embodiments of the present disclosure provide a silencer device, an engine exhaust system, a silencer method and a computer-readable storage medium, which are conducive to optimizing the silencer capability.

[0005] In one aspect of the present disclosure, there is provided a silencing device, comprising:

[0006] The cylinder has an air inlet and an air outlet spaced apart in the axial direction, and the air flows from the air inlet to the air outlet;

[0007] A partition assembly is arranged in the air flow path in the cylinder;

[0008] The rotating assembly is disposed close to the partition assembly and can rotate relative to the partition assembly;

[0009] The surface of the partition component has a first hole, the surface of the rotating component has a second hole, the exposed portion of the second hole relative to the first hole forms a muffler, and the airflow flows from the air inlet through the muffler to the exhaust port;

[0010] The second hole is configured to move relative to the first hole as the rotating assembly rotates, so that the cross-sectional shape of the muffler portion allowing airflow to pass through changes while the cross-sectional area remains unchanged.

[0011] In some embodiments, the partition assembly includes a first partition, the first partition is in the shape of a plate, and is arranged perpendicular to the axis of the cylinder, and the first hole is arranged in the first partition; the rotating assembly includes a first rotating portion, the first rotating portion is in the shape of a plate, and is parallel to the first partition, the rotating assembly is configured to rotate around the axis of the cylinder, and the first rotating portion has a plurality of second hole rotating portions;

[0012] wherein the first hole and the plurality of second holes at least partially overlap, and portions of the plurality of second holes exposed relative to the first hole form a muffler;

[0013] In which, the cross-sectional shape of each of the multiple second holes exposed relative to the first hole and / or the number of the multiple second holes exposed relative to the first hole changes with the rotation of the rotating component, and the total cross-sectional area of ​​the multiple second holes exposed relative to the first hole remains unchanged.

[0014] In some embodiments, the first hole is oblong, the second hole is circular, and the diameter of the first hole is equal to the diameter of the second hole;

[0015] The plurality of second holes are arranged equidistantly along the circumference of the first rotating part, the number of the second holes is twice the number of the first holes, and the circumferential spacing between two adjacent second holes is equal to the length of the first hole.

[0016] In some embodiments, the outer circumference of the first partition and the first rotating portion is circular and tangent to the inner wall of the cylinder. There are multiple first holes, and the multiple first holes are equidistantly spaced along the circumference of the first partition, and the circumferential spacing of the multiple first holes is equal to the circumferential spacing of the multiple second holes.

[0017] In some embodiments, the plurality of first holes are evenly spaced along the radial direction of the first partition, the plurality of second holes are evenly spaced along the radial direction of the first rotating portion, and the radial spacing of the plurality of first holes is equal to the radial spacing of the plurality of second holes;

[0018] Among the plurality of first holes, the length of the first hole farther from the center of the first partition is greater than the length of the first hole closer to the center.

[0019] In some embodiments, the partition assembly includes a second partition connected to the first partition, the second partition is in a hollow cylindrical shape, the axis of the first partition coincides with the axis of the cylinder, and the second partition has a plurality of first holes;

[0020] The rotating assembly includes a second rotating part connected to the first rotating part, the second rotating part is in a hollow cylindrical shape, the second rotating part is inserted into the second partition and abuts against the inner wall of the second partition, and the second rotating part has a plurality of second holes;

[0021] The plurality of first holes in the second partition and the plurality of second holes in the second partition are arranged equidistantly in the circumferential direction at the same interval, and / or are arranged equidistantly in the axial direction at the same interval.

[0022] In some embodiments, the partition assembly further includes a third partition, the third partition and the first partition are respectively disposed at two ends of the second partition, the first partition and the third partition are both annular, and the inner diameters of the first partition and the third partition are equal to the outer diameter of the second partition;

[0023] The third partition is arranged closer to the air inlet relative to the first partition, and the third partition does not have the first hole.

[0024] In some embodiments, there are multiple partition assemblies and rotating assemblies, and the multiple partition assemblies are arranged at intervals along the axial direction to divide the interior of the cylinder into multiple muffler chambers.

[0025] In some embodiments, mounting holes are respectively provided at both ends of the cylinder along the axial direction;

[0026] Wherein, the muffler rotating assembly also includes:

[0027] A rotating shaft is passed through the partition assembly and mounted on mounting holes at both ends of the cylinder;

[0028] A driving member is drivably connected to the rotating shaft.

[0029] In some embodiments, the cylinder includes a perforated plate and a sound absorbing material, the perforated plate includes a plurality of third holes, the sound absorbing material is laid on the inner periphery of the cylinder, and the perforated plate is attached to the sound absorbing material.

[0030] In another aspect of the present disclosure, there is provided an engine exhaust system, comprising:

[0031] Engine exhaust pipe;

[0032] The silencer device as described in any of the above embodiments is arranged in the exhaust path of the engine exhaust pipe;

[0033] A detection device configured to obtain noise conditions of an exhaust port of the muffler device;

[0034] The processor is connected to the muffler device and the detection device by signal, and is configured to rotate the rotating component according to the noise conditions of the exhaust port of the muffler device to adjust the cross-sectional shape of each second hole among the multiple second holes exposed relative to the first hole and / or the number of second holes among the multiple second holes exposed relative to the first hole.

[0035] In some embodiments, the detection device comprises:

[0036] An engine detection unit, configured to obtain state parameters of the engine at time t;

[0037] The muffler detection unit is disposed at the exhaust port and is configured to obtain environmental parameters of the exhaust port at time t-1;

[0038] The processor is configured to determine the noise value of the exhaust port at time t+1 based on the state parameters of the engine at time t and the environmental parameters of the exhaust port at time t-1, and adjust the rotation state of the rotating component according to the noise value.

[0039] In another aspect of the present disclosure, a method for silencing an engine exhaust system according to any one of the above embodiments is provided, comprising:

[0040] Obtain the noise condition of the exhaust port of the silencer;

[0041] According to the noise condition of the exhaust port of the muffler, the rotating assembly is rotated to adjust the cross-sectional shape of each of the plurality of second holes exposed relative to the first hole and / or the number of the plurality of second holes exposed relative to the first hole.

[0042] In some embodiments, according to the noise condition of the exhaust port of the muffler device, the operation of rotating the rotating assembly to adjust the cross-sectional shape of each second hole in the plurality of second holes exposed relative to the first hole and / or the number of the second holes in the plurality of second holes exposed relative to the first hole specifically includes:

[0043] If the noise frequency of the exhaust port increases, rotating the rotating assembly to reduce the cross-sectional shape of each of the plurality of second holes exposed relative to the first hole, and / or increase the number of the plurality of second holes exposed relative to the first hole; and

[0044] If the noise frequency of the exhaust port is reduced, the rotating assembly is rotated to enlarge the cross-sectional shape of each of the plurality of second holes exposed relative to the first hole and / or reduce the number of the plurality of second holes exposed relative to the first hole.

[0045] In some embodiments, the operation of obtaining the noise condition of the exhaust port of the muffler device specifically includes:

[0046] Obtain the state parameters of the engine at time t and the environmental parameters of the exhaust port at time t-1;

[0047] Determine the noise value of the exhaust port at time t+1 according to the state parameters of the engine at time t and the environmental parameters of the exhaust port at time t-1;

[0048] The rotation state of the rotating component is adjusted according to the noise value of the exhaust port at time t+1.

[0049] In another aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the deburring method of any of the above embodiments is implemented.

[0050] Therefore, according to the embodiment of the present disclosure, the shape of the muffler can be adjusted by rotating the rotating component, thereby allowing airflow to pass through cross-sections of different shapes, and being able to absorb noise of different frequency bands during the muffler process to meet the ever-changing needs of the engine's operating conditions. The total area of ​​the muffler that allows airflow to pass through does not change, and does not affect the engine's exhaust back pressure and power performance. The absorption of noise of different frequency bands is achieved without changing the muffler's air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0052] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0053] Figure 1 is a schematic structural diagram of some embodiments of the silencer device according to the present disclosure;

[0054] Figure 2 is a schematic structural diagram of some embodiments of the partition assembly of the silencer device according to the present disclosure;

[0055] Figure 3 is a schematic structural diagram of some embodiments of the rotating assembly of the silencer device according to the present disclosure;

[0056] Figure 4A yes Figure 1 A schematic diagram of the structure of some embodiments of the AA section;

[0057] Figure 4B yes Figure 4A A partial schematic diagram of

[0058] Figure 5A yes Figure 1 A schematic structural diagram of other embodiments of the AA section;

[0059] Figure 5B yes Figure 5A A partial schematic diagram of

[0060] Fig. 6A yes Figure 1 Schematic diagrams of structures of some other embodiments of the AA section;

[0061] Figure 6B yes Fig. 6A A partial schematic diagram of

[0062] Figure 7 is a schematic diagram of airflow movement paths according to some embodiments of the silencer device disclosed herein;

[0063] Figure 8 is a schematic structural diagram of some embodiments of the silencer cylinder of the silencer device according to the present disclosure;

[0064] Fig. 9 is a connection diagram of some embodiments of the engine exhaust system according to the present disclosure;

[0065] Fig.10 is a flow chart of some embodiments of the noise cancellation method according to the present disclosure.

[0066] In the figure:

[0067] 1. Cylinder; 11. Air inlet; 12. Exhaust port; 13. Mounting hole; 14. Perforated plate; 15. Sound absorbing material; 16. Third hole; 2. Partition assembly; 21. First hole; 22. First partition; 23. Second partition; 24. Third partition; 3. Rotation assembly; 31. Second hole; 32. First rotating part; 33. Second rotating part; 34. Rotating shaft; 35. Driving member; 36. Connecting sleeve; 4. Silencing device; 5. Detection device; 6. Processor; 71. First silencing chamber; 72. Second silencing chamber; 73. Third silencing chamber; 74. Fourth silencing chamber; 75. Fifth silencing chamber; 8. Silencing element.

[0068] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0069] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0070] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0071] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0072] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0073] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0074] The passive sound absorption technology in the related art cannot properly adjust the sound absorption performance according to the change of noise frequency during use. The exhaust noise frequency of the engine is constantly changing according to the operating conditions of the engine, so the passive muffler cannot achieve a relatively ideal sound absorption effect.

[0075] The active silencer technology in the related technology mainly relies on adjusting the volume or perforation rate of the silencer cavity to change the sound absorption performance of the silencer. The allowable state parameters currently collected are first adjusted, and then the execution structure is adjusted to perform corresponding actions. Changing the suction performance of the silencer will lead to frequent changes in the exhaust back pressure of the engine, thereby reducing power performance, increasing fuel consumption and other problems.

[0076] In view of this, in one aspect of an embodiment of the present disclosure, a silencer device is provided to optimize the silencer capability.

[0077] Figure 1 is a schematic diagram of the structure of some embodiments of the silencer device according to the present disclosure, Figure 2is a schematic diagram of the structure of some embodiments of the partition assembly of the silencer device according to the present disclosure, Figure 3 is a schematic diagram of the structure of some embodiments of the rotating assembly of the muffler device according to the present disclosure, with reference to Figure 1 to Figure 3 The muffler device comprises a barrel 1, a partition assembly 2 and a rotating assembly 3. The muffler device includes but is not limited to being arranged in the exhaust pipe of the engine to reduce the exhaust noise of the engine.

[0078] The cylinder 1 has an air inlet 11 and an exhaust port 12 arranged at intervals along the axial direction, and the airflow flows from the air inlet 11 to the exhaust port 12. The cylinder 1 is a hollow cylindrical shape and is arranged in the exhaust gas discharge path of the engine. The gas discharged from the exhaust port 12 is discharged from the outlet of the engine exhaust pipe. The air inlet 11 and the exhaust port 12 can be arranged at both ends of the cylinder 1 along the axial direction of the cylinder 1.

[0079] The partition component 2 is arranged in the air flow path in the cylinder 1, and the rotating component 3 is arranged close to the partition component 2 and can rotate relative to the partition component 2. The shape and size of the partition component 2 and the rotating component 3 can be adjusted according to actual needs, and the partition component 2 can divide the interior of the cylinder 1 into a plurality of silencing chambers.

[0080] The surface of the partition component 2 has a first hole 21 , and the surface of the rotating component 3 has a second hole 31 . The exposed portion of the second hole 31 relative to the first hole 21 forms a silencer, and the air flows from the air inlet 11 to the exhaust port 12 through the silencer.

[0081] The second hole 31 is configured to move relative to the first hole 21 as the rotating assembly 3 rotates, so that the cross-sectional shape of the muffler portion allowing airflow to pass through changes while the cross-sectional area remains unchanged. In the process of the second hole 31 moving with the first hole 21, the first hole 21 and the surface of the partition assembly 2 at least partially block the second hole 31, and the shape of the portion of the second hole 31 exposed relative to the first hole 21 also changes accordingly, but the total cross-sectional area of ​​the second hole 31 exposed relative to the first hole 21 remains unchanged.

[0082] In this embodiment, the shape of the silencer can be adjusted by rotating the rotating component 3, thereby allowing airflow to pass through cross-sections of different shapes. During the silencing process, it is possible to absorb noise of different frequency bands and meet the ever-changing needs of the engine's operating conditions. The total area of ​​the silencer that allows airflow to pass through does not change, and does not affect the engine's exhaust back pressure and power performance. The absorption of noise of different frequency bands is achieved without changing the muffler's air volume.

[0083] Figure 4A yes Figure 1 The schematic diagram of the structure of some embodiments of the AA section, Figure 4B yes Figure 4A A partial schematic diagram of Figure 5A yes Figure 1 The schematic diagram of the structure of other embodiments of the AA section, Figure 5B yes Figure 5A A partial schematic diagram of Fig. 6A yes Figure 1 The schematic diagrams of the structures of some other embodiments of the AA section are shown in FIG. Figure 6B yes Fig. 6A A partial schematic diagram of Figure 1 to Figure 6B In some embodiments, the partition component 2 includes a first partition portion 22, which is in the shape of a plate and is arranged perpendicular to the axis of the cylinder 1, and the first hole 21 is arranged in the first partition portion 22; the rotating component 3 includes a first rotating portion 32, which is in the shape of a plate and is parallel to and attached to the first partition portion 22, and the rotating component 3 is configured to rotate around the axis of the cylinder 1, and the first rotating portion 32 has a plurality of second holes 31 rotating portions.

[0084] The first hole 21 at least partially overlaps with the plurality of second holes 31, and the exposed portions of the plurality of second holes 31 relative to the first hole 21 form a muffler. The cross-sectional shape of each of the plurality of second holes 31 exposed relative to the first hole 21 and / or the number of the plurality of second holes 31 exposed relative to the first hole 21 change with the rotation of the rotating assembly 3, and the total cross-sectional area of ​​the plurality of second holes 31 exposed relative to the first hole 21 remains unchanged.

[0085] The first partition 22 and the first rotating part 32 include but are not limited to end plates with equal outer diameters. The first holes 21 are arranged at intervals on the surface of the first partition 22 , and the second holes 31 are arranged at intervals on the end surface of the first rotating part 32 .

[0086] The muffler portion may include a plurality of muffler elements, each of which may include a first hole 21 and a plurality of second holes 31, and the number of second holes 31 in each muffler element may be 2. During the rotation of the first rotating portion 32, the plurality of second holes 31 in each muffler element are displaced relative to the first hole 21, the shape of each second hole 31 exposed relative to the first hole 21 and / or the number of second holes 31 exposed relative to the first hole 21 in the plurality of second holes 31 changes, and the total area of ​​all second holes 31 exposed relative to the first hole 21 remains unchanged.

[0087] In this embodiment, the cross-sectional shape of each second hole 31 among the multiple second holes 31 exposed relative to the first hole 21 and / or the number of second holes 31 among the multiple second holes 31 exposed relative to the first hole 21 are changed by the rotation of the first rotating part 32, while the total cross-sectional area of ​​the multiple second holes 31 exposed relative to the first hole 21 remains unchanged, so that the total area through which the airflow passes remains unchanged, does not affect the exhaust back pressure and power performance of the engine, and can also adjust the size of the silencer according to the real-time operating status of the engine, absorb noise in different frequency bands, and achieve a balance between exhaust back pressure and efficient noise control.

[0088] refer to Figure 1 to Figure 6B In some embodiments, the first hole 21 is in an oblong shape, the second hole 31 is in a circular shape, and the diameter of the first hole 21 is equal to the diameter of the second hole 31. Each muffler element 8 may include one first hole 21 and two second holes 31.

[0089] The plurality of second holes 31 are equidistantly arranged along the circumference of the first rotating portion 32 . The number of the second holes 31 is twice the number of the first holes 21 , and the circumferential spacing between two adjacent second holes 31 is equal to the length of the first hole 21 .

[0090] refer to Figure 4A and 4B In this rotational state, one of the second holes 31 in each silencer element 8 is completely covered by the first partition 22 and is not exposed, such as hole a in the figure, and the center of the other second hole 31 coincides with the center of a semicircle on one side of the first hole 21, such as hole b in the figure, and is completely exposed from the first hole 21, and the airflow passes through the exposed second hole 31. The number of the second hole 31 exposed relative to the first hole 21 in each silencer element 8 is 1, and the airflow flow cross section is the cross section of the entire second hole 31 exposed relative to the first hole 21, that is, the cross-sectional area of ​​hole b, and the area of ​​the airflow flow cross section is S b .

[0091] refer to Figure 5A and 5B In this rotation state, the two second holes 31 in each silencer element 8 are partially exposed relative to the first hole 21 and partially blocked by the first partition 22, and the airflow passes through the exposed portions of the two second holes 31 relative to the first hole 21. As shown in the figure, the a1 portion of hole a is exposed from the first hole 21, and the a2 portion is blocked, the b1 portion of hole b is exposed from the first hole 21, and the b2 portion is blocked, and the airflow passes through the a1 portion of hole a and the b1 portion of hole b.

[0092] The number of the second holes 31 exposed relative to the first hole 21 in each silencer element 8 is 2, and the airflow cross section is the sum of the cross sections of the two second holes 31 exposed relative to the first hole 21. The area of ​​the airflow cross section is S a1 +S b1 =Sa =S b .

[0093] refer to Fig. 6A and 6B In this rotational state, one of the second holes 31 in each silencer element 8 is completely covered by the first partition 22 and is not exposed, such as hole b in the figure, and the center of the other second hole 31 coincides with the center of a semicircle on one side of the first hole 21, such as hole a in the figure, and is completely exposed from the first hole 21, and the airflow passes through the exposed second hole 31. The number of the second holes 31 exposed relative to the first hole 21 in each silencer element 8 is 1, and the airflow flow cross section is the cross section of the entire second hole 31 exposed relative to the first hole 21, that is, the cross-sectional area of ​​hole a, and the area of ​​the airflow flow cross section is S a .

[0094] The shapes of the first hole 21 and the second hole 31 can be adjusted or combined as needed, such as circular, rectangular, strip or other shaped holes. The first hole 21 and the second hole 31 can be used in combination of holes of different sizes and shapes to have a wider range of sound wave scattering and absorption characteristics and cover a wider frequency range.

[0095] In this embodiment, as the rotating component 3 rotates, the exposed areas of the two second holes 31 in each silencer element 8 change in an opposite trend relative to the first hole 21, and the total area of ​​the silencer element 8 for airflow to pass through remains unchanged. The shape and size of the second holes 31 exposed relative to the first hole 21 can be changed steplessly in real time to meet the needs of reducing noise of different frequencies, and the total area of ​​the silencer element 8 remains unchanged, without affecting the exhaust airflow throughput and exhaust back pressure.

[0096] Figure 7 is a schematic diagram of airflow movement paths according to some embodiments of the silencer device disclosed herein, with reference to Figure 1 to Figure 7 In some embodiments, the outer circumferences of the first partition 22 and the first rotating portion 32 are circular and tangent to the inner wall of the cylinder 1. There are multiple first holes 21, and the multiple first holes 21 are arranged at equal intervals along the circumference of the first partition 22, and the circumferential spacing of the multiple first holes 21 is equal to the circumferential spacing of the multiple second holes 31. The cross-sections of the first partition 22 and the first rotating portion 32 can also be set to other shapes such as square and elliptical.

[0097] In this embodiment, the first partition 22 and the first rotating part 32 can be circular end plates and are arranged in the air flow path within the cylinder 1. The number of the first holes 21 can be multiple and are circumferentially spaced at equal intervals with the second holes 31 to reduce noise to a greater extent.

[0098] refer to Figure 1 to Figure 7In some embodiments, the plurality of first holes 21 are evenly spaced apart in the radial direction of the first partition portion 22 , the plurality of second holes 31 are evenly spaced apart in the radial direction of the first rotating portion 32 , and the radial spacing of the plurality of first holes 21 is equal to the radial spacing of the plurality of second holes 31 .

[0099] In order to make the area of ​​each silencer element 8 composed of each first hole 21 and two second holes 31 distributed radially equal for air flow to pass through, the length of the first hole 21 farther from the center of the first partition 22 among the multiple first holes 21 can be set to be greater than the length of the first hole 21 closer to the center, so as to improve the controllability of the silencer device.

[0100] The diameters of the second holes 31 can be set to be the same, so as to simplify the calculation of the size of a single silencer element 8, which is beneficial to improving the control accuracy and facilitating processing and manufacturing.

[0101] In this embodiment, in order to achieve better noise reduction effect, a plurality of first holes 21 may be arranged at intervals along the radial direction of the first partition portion 22 , and a plurality of second holes 31 may be arranged at intervals along the radial direction of the first rotating portion 32 at the same intervals.

[0102] refer to Figure 1 to Figure 7 In some embodiments, the partition assembly 2 includes a second partition 23 connected to the first partition 22, the second partition 23 is a hollow cylindrical shape, the axis of the first partition 22 coincides with the axis of the cylinder 1, and the second partition 23 has a plurality of first holes 21. The axes of the first partition 22, the second partition 23, the first rotating part 32, and the second rotating part 33 coincide with the axis of the cylinder 1.

[0103] The rotating assembly 3 includes a second rotating part 33 connected to the first rotating part 32 . The second rotating part 33 is hollow cylindrical and inserted into the second partition 23 and abuts against the inner wall of the second partition 23 . The second rotating part 33 has a plurality of second holes 31 .

[0104] The plurality of first holes 21 of the second partition 23 and the plurality of second holes 31 located in the second partition 23 are arranged equidistantly along the circumferential direction at the same interval and / or are arranged equidistantly along the axial direction at the same interval. The diameter of the second partition 23 is slightly larger than the diameter of the second rotating part 33.

[0105] The cross-sections of the second partition 23 and the second rotating portion 33 may also be set to other shapes such as square, oval, etc. The adjustment change process of the adjustment part between the second partition 23 and the second rotating portion 33 is similar to the change process between the first partition 22 and the first rotating portion 32.

[0106] In this embodiment, a second partition 23 and a second rotating portion 33 can also be set in a direction parallel to the axis of the cylinder 1 to reduce noise along the axial direction and radial direction of the cylinder 1 respectively. It can be used to reduce various low-frequency, medium-frequency and high-frequency noises. It has a wide range of applications and optimizes the noise reduction performance of the silencer.

[0107] refer to Figure 1 to Figure 3 and Figure 7 , Figure 7 The arrow direction in is the airflow movement direction. In some embodiments, the partition assembly 2 further includes a third partition 24. The third partition 24 and the first partition 22 are respectively arranged at both ends of the second partition 23. The first partition 22 and the third partition 24 are both annular. The inner diameters of the first partition 22 and the third partition 24 are equal to the outer diameter of the second partition 23. The third partition 24 is arranged close to the air inlet 11 relative to the first partition 22, and the third partition 24 does not have the first hole 21.

[0108] In this embodiment, by providing a third partition portion 24 without the first hole 21, the airflow entering from the air inlet 11 can be guided into the second rotating portion 33, and then flow toward the exhaust port 12 through the silencer portions provided on the second rotating portion 33 and the first rotating portion 32 in sequence, thereby achieving multiple reductions in noise.

[0109] refer to Figure 1 to Figure 3 and Figure 7 In some embodiments, there are multiple partition components 2 and rotating components 3, which are arranged at intervals along the axial direction to divide the interior of the cylinder 1 into multiple muffler chambers.

[0110] Two partition components 2 and two rotating components 3 can be arranged at intervals along the axial direction of the cylinder 1, and the two third partition parts 24 are symmetrically arranged about the midpoint of the two partition components 2 along the axial direction of the cylinder 1, and the two rotating components 3 are symmetrically arranged about the midpoint of the two partition components 2 along the axial direction of the cylinder 1, that is, the two first rotating parts 32 are arranged adjacent to each other.

[0111] The first rotating part 32, the second rotating part 33, the first partition 22 and the second partition 23 respectively divide the interior of the cylinder 1 into a plurality of silencer chambers. The first silencer chamber 71 is formed between the side of the cylinder 1 close to the air inlet 11 and the third partition 24 close to the air inlet 11. The second silencer chamber 72 is formed between the second partition 23, the third partition 24 and the first partition 22 close to the air inlet 11. The third silencer chamber 72 is formed between the two partition components 2. The fourth silencer chamber 74 is formed between the second partition 23, the third partition 24 and the first partition 22 close to the exhaust port 12. The fifth silencer chamber 75 is formed between the side of the cylinder 1 close to the exhaust port 12 and the third partition 24 close to the exhaust port 12.

[0112] The airflow entering from the air inlet 11 enters the first muffler chamber 71, and enters the second muffler chamber 72 from the first muffler chamber 71 through the second rotating part 33 and the second partition 23, where the noise frequency can be adjusted by the muffler formed by the second hole 31 of the second rotating part 33 and the first hole 21 of the second partition 23; the airflow in the second muffler chamber 72 passes through the first rotating part 32 and the first partition 22 to enter the third muffler chamber 73, where the noise frequency can be adjusted by the muffler formed by the second hole 31 of the first rotating part 32 and the first hole 21 of the first partition 22; the airflow in the third muffler chamber 73 passes through the first partition 22 of another partition component 2 and the rotating component 3 of another rotating component 3 to enter the fourth muffler chamber 74, where the noise frequency can be adjusted by the muffler formed by the second hole 31 of the first rotating part 32 and the first hole 21 of the first partition 22; the airflow in the fourth muffler chamber 74 passes through the second partition 23 of another partition component 2 to enter the fifth muffler chamber 75, and then enters the exhaust port 12 for discharge.

[0113] In this embodiment, by providing multiple partition components 2 and multiple rotating components 3, noise can be weakened in multiple directions to achieve better noise reduction capability. Increasing the number of anechoic chambers can help cover more resonant frequencies, thereby more effectively absorbing noise.

[0114] Figure 8 is a schematic diagram of the structure of some embodiments of the silencer tube of the silencer device according to the present disclosure, with reference to Figure 1 , Figure 2 , Figure 7 and Figure 8 In some embodiments, mounting holes 13 are respectively provided at both ends of the cylinder 1 along the axial direction. The muffler rotating assembly 3 further includes a rotating shaft 34 and a driving member 35. The rotating shaft 34 is passed through the partition assembly 2 and mounted on the mounting holes 13 at both ends of the cylinder 1, and the driving member 35 is drivably connected to the rotating shaft 34. Connecting sleeves 36 can be sleeved at both ends of the rotating shaft 34, and the connecting sleeves 36 are provided with keyways, which are respectively connected to the rotating shaft 34 and the driving member 35.

[0115] In this embodiment, the plurality of rotating components 3 can be driven to rotate relative to the partition component 2 by the driving component 35 and the rotating shaft 34 to improve the controllability of the rotation and achieve more accurate noise control. The driving component 35 may include a structure such as an oil cylinder or an air cylinder that can rotate the adjusting device.

[0116] refer to Figure 1 , Figure 7 and Figure 8 In some embodiments, the cylinder 1 includes a perforated plate 14 and a sound absorbing material 15, the perforated plate 14 includes a plurality of third holes 16, the sound absorbing material 15 is laid on the inner periphery of the cylinder 1, and the perforated plate 14 is attached to the sound absorbing material 15. The sound absorbing material 15 is laid between the inner wall of the cylinder 1 and the perforated plate 14.

[0117] In this embodiment, a perforated plate 14 and a sound absorbing material 15 may be provided on the inner wall of the cylinder 1 to achieve multiple reductions in noise and improve the silencing performance of the silencing device.

[0118] Fig. 9 is a connection diagram of some embodiments of the engine exhaust system according to the present disclosure, with reference to Figures 1 to 9 In another aspect of the embodiment of the present disclosure, an engine exhaust system is provided, including an engine exhaust pipe, a silencer 4 as in any of the above embodiments, a detection device 5 and a processor 6.

[0119] The muffler 4 is arranged in the exhaust path of the engine exhaust pipe, and the detection device 5 is configured to obtain the noise condition of the exhaust port 12 of the muffler 4. The noise condition of the exhaust port 12 includes but is not limited to the noise of the exhaust port 12, air pressure and other parameters.

[0120] The processor 6 is signal-connected to the silencer and the detection device 5, and is configured to rotate the rotating assembly 3 according to the noise conditions of the exhaust port 12 of the silencer to adjust the cross-sectional shape of each second hole 31 among the multiple second holes 31 exposed relative to the first hole 21 and / or the number of second holes 31 among the multiple second holes 31 exposed relative to the first hole 21.

[0121] In this embodiment, the engine working state and exhaust conditions are monitored in real time by the detection device 5, and the appropriate size and shape of the silencer are planned according to the exhaust noise conditions. The first hole 21 and the second hole 31 are staggered during the rotation process, so that the size and shape of the silencer can be adjusted steplessly in real time, and the ventilation area of ​​the silencer is kept unchanged. The rotating component 3 is rotated only to the corresponding position to achieve targeted attenuation of different noises, which can adapt to changes in working conditions and improve the accuracy of adjustment and response speed.

[0122] In some embodiments, the detection device 5 includes an engine detection unit and a muffler detection unit. The engine detection unit is configured to obtain the state parameters of the engine at time t, and the state parameters of the engine include but are not limited to the engine speed, exhaust pressure, exhaust port noise and other parameters, which are set as the main input parameters. The engine detection unit may include a speed sensor, an exhaust pressure sensor, a noise sensor, etc.

[0123] The muffler detection unit is disposed at the exhaust port 12 and is configured to obtain environmental parameters of the exhaust port 12 at time t-1. The environmental parameters of the exhaust port 12 include but are not limited to parameters such as noise and air pressure, which are set as feedback parameters. t-1 is but is not limited to the second before time t. The muffler detection unit may include a noise sensor, an exhaust pressure sensor, etc.

[0124] The processor 6 is configured to determine the noise value of the exhaust port 12 at time t+1 according to the state parameters of the engine at time t and the environmental parameters of the exhaust port 12 at time t-1, and adjust the rotation state of the rotating component 3 according to the noise value.

[0125] In this embodiment, the noise value at the exhaust port 12 at the next moment is predicted by the state parameters of the engine at the current moment and the environmental parameters of the exhaust port 12 at the previous moment, and the predicted noise value at the exhaust port 12 at the next moment is compared with the noise threshold. When the predicted noise value exceeds the threshold, the silencer 4 is started, the noise value is analyzed, the high and low changes in the noise frequency are determined, the size of the silencer matching the noise frequency is calculated, and the rotating component 3 is rotated and adjusted.

[0126] Fig.10 is a flowchart of some embodiments of the noise elimination method according to the present disclosure, referring to Figures 1 to 10 In another aspect of the present disclosure, a method for silencing an engine exhaust system based on any one of the above embodiments is provided, comprising: steps S1 to S2.

[0127] In step S1 , the noise condition of the exhaust port 12 of the silencer is obtained.

[0128] In step S2, according to the noise condition of the exhaust port 12 of the muffler device, the rotating component 3 is rotated to adjust the cross-sectional shape of each second hole 31 exposed relative to the first hole 21 and / or the number of second holes 31 exposed relative to the first hole 21 among the multiple second holes 31.

[0129] When the noise of the exhaust port 12 is greater than or equal to the noise threshold, the muffler is activated to rotate the rotating assembly 3 to a suitable position relative to the partition assembly 2. When the noise of the exhaust port 12 is less than the noise threshold, the muffler is kept at the current rotation position.

[0130] In this embodiment, the engine operating state and exhaust conditions are monitored in real time, and the size and shape of the appropriate silencer are planned according to the exhaust noise conditions, so that the rotating component 3 rotates only to the corresponding position to achieve targeted reduction of different noises, which can adapt to changes in working conditions and improve the accuracy of adjustment and response speed.

[0131] In some embodiments, according to the noise condition of the exhaust port 12 of the muffler device, the operation of rotating the rotating assembly 3 to adjust the cross-sectional shape of each second hole 31 exposed relative to the first hole 21 and / or the number of the second holes 31 exposed relative to the first hole 21 in the plurality of second holes 31 specifically includes:

[0132] If the noise frequency of the exhaust port 12 increases, the rotating assembly 3 is rotated to reduce the cross-sectional shape of each of the plurality of second holes 31 exposed relative to the first hole 21, and / or the number of the plurality of second holes 31 exposed relative to the first hole 21 is increased to achieve greater damping of high-frequency sound waves; and

[0133] If the noise frequency of the exhaust port 12 is reduced, the rotating component 3 is rotated to enlarge the cross-sectional shape of each of the multiple second holes 31 exposed relative to the first hole 21, and / or the number of the multiple second holes 31 exposed relative to the first hole 21 is reduced to allow more sound waves to pass through and generate greater resonance in the muffler.

[0134] In this embodiment, when the noise frequency of the exhaust port 12 increases, the noise frequency can be reduced by making the cross-sectional shape of each of the plurality of second holes 31 exposed relative to the first hole 21 smaller and increasing the number of second holes 31 exposed relative to the first hole 21. Figure 5A The status switches to Figure 4A or Fig. 6A When the noise frequency of the exhaust port 12 is reduced, the noise frequency can be increased by making the cross-sectional shape of each of the plurality of second holes 31 exposed relative to the first hole 21 larger and reducing the number of second holes 31 exposed relative to the first hole 21, for example, Figure 4A or Fig. 6A The status switches to Figure 5A status.

[0135] In some embodiments, the operation of obtaining the noise condition of the exhaust port 12 of the silencer device specifically includes: obtaining the state parameters of the engine at time t and the environmental parameters of the exhaust port 12 at time t-1; determining the noise value of the exhaust port 12 at time t+1 based on the state parameters of the engine at time t and the environmental parameters of the exhaust port 12 at time t-1; and adjusting the rotation state of the rotating component 3 based on the noise value of the exhaust port 12 at time t+1.

[0136] In this embodiment, the state parameters of the engine include but are not limited to the engine speed, exhaust pressure, exhaust port noise and other parameters, which are set as the main input parameters, and the environmental parameters of the exhaust port 12 at time t-1 include but are not limited to noise, air pressure and other parameters, which are set as feedback parameters. The noise value at the exhaust port 12 at the next moment is predicted by the state parameters of the engine at the current moment and the environmental parameters of the exhaust port 12 at the previous moment, thereby improving the accuracy and response speed of noise control.

[0137] In another aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by the processor 6, the deburring method of any of the above embodiments is implemented.

[0138] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on a computer-readable medium or transmitted by means of one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one place to another. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0139] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0140] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A silencing device, characterized in that: include: The cylinder (1) has an air inlet (11) and an air outlet (12) arranged at intervals along the axial direction, and an air flow flows from the air inlet (11) to the air outlet (12); A partition assembly (2) arranged in the air flow path within the cylinder (1); A rotating assembly (3) is disposed close to the partition assembly (2) and is capable of rotating relative to the partition assembly (2); The surface of the partition component (2) has a first hole (21), the surface of the rotating component (3) has a second hole (31), the exposed portion of the second hole (31) relative to the first hole (21) forms a silencer, and the airflow flows from the air inlet (11) through the silencer to the air outlet (12); The second hole (31) is configured to move relative to the first hole (21) as the rotating assembly (3) rotates, so that the cross-sectional shape of the muffler portion allowing airflow to pass through changes while the cross-sectional area remains unchanged.

2. The silencing device according to claim 1, characterized in that: The partition assembly (2) comprises a first partition portion (22), the first partition portion (22) is in the shape of a plate and is arranged perpendicular to the axis of the cylinder (1), and the first hole (21) is arranged in the first partition portion (22); the rotating assembly (3) comprises a first rotating portion (32), the first rotating portion (32) is in the shape of a plate and is parallel to and abuts against the first partition portion (22), the rotating assembly (3) is configured to rotate around the axis of the cylinder (1), and the first rotating portion (32) has a plurality of rotating portions of the second hole (31); The first hole (21) and the plurality of second holes (31) at least partially overlap, and the exposed portions of the plurality of second holes (31) relative to the first hole (21) form a sound-absorbing portion; The cross-sectional shape of each of the plurality of second holes (31) exposed relative to the first hole (21) and / or the number of the plurality of second holes (31) exposed relative to the first hole (21) changes with the rotation of the rotating component (3), and the total cross-sectional area of ​​the plurality of second holes (31) exposed relative to the first hole (21) remains unchanged.

3. The silencing device according to claim 2, characterized in that: The first hole (21) is in the shape of an oblong, the second hole (31) is in the shape of a circle, and the diameter of the first hole (21) is equal to the diameter of the second hole (31); Wherein, a plurality of the second holes (31) are arranged at equal intervals along the circumference of the first rotating part (32), the number of the second holes (31) is twice the number of the first holes (21), and the circumferential spacing between two adjacent second holes (31) is equal to the length of the first hole (21).

4. The silencing device according to claim 3, characterized in that: The outer circumferences of the first partition (22) and the first rotating part (32) are circular and are tangent to the inner wall of the cylinder (1). The number of the first holes (21) is multiple, and the multiple first holes (21) are arranged at equal intervals along the circumference of the first partition (22), and the circumferential spacing of the multiple first holes (21) is equal to the circumferential spacing of the multiple second holes (31).

5. The silencing device according to claim 4, characterized in that: The plurality of first holes (21) are distributed at equal intervals in the radial direction of the first partition portion (22), the plurality of second holes (31) are distributed at equal intervals in the radial direction of the first rotating portion (32), and the radial spacing between the plurality of first holes (21) is equal to the radial spacing between the plurality of second holes (31); Among the plurality of first holes (21), the length of the first hole (21) that is farther from the center of the first partition (22) is greater than the length of the first hole (21) that is closer to the center.

6. The silencing device according to claim 4 or 5, characterized in that: The partition assembly (2) comprises a second partition (23) connected to the first partition (22), the second partition (23) is in the shape of a hollow cylinder, the axis of the first partition (22) coincides with the axis of the cylinder (1), and the second partition (23) has a plurality of the first holes (21); The rotating assembly (3) comprises a second rotating part (33) connected to the first rotating part (32), the second rotating part (33) is in the shape of a hollow cylinder, the second rotating part (33) is inserted into the second partition part (23) and abuts against the inner wall of the second partition part (23), and the second rotating part (33) has a plurality of second holes (31); The plurality of first holes (21) of the second partition (23) and the plurality of second holes (31) located in the second partition (23) are arranged equidistantly in the circumferential direction at the same interval, and / or are arranged equidistantly in the axial direction at the same interval.

7. The silencing device according to claim 6, characterized in that: The partition assembly (2) further comprises a third partition (24), wherein the third partition (24) and the first partition (22) are respectively arranged at two ends of the second partition (23), the first partition (22) and the third partition (24) are both annular, and the inner diameters of the first partition (22) and the third partition (24) are equal to the outer diameter of the second partition (23); The third partition (24) is arranged relative to the first partition (22) and close to the air inlet (11), and the third partition (24) does not have the first hole (21).

8. The silencing device according to claim 7, characterized in that: The number of the partition components (2) and the rotating components (3) is multiple, and the multiple partition components (2) are arranged at intervals along the axial direction to divide the interior of the cylinder (1) into multiple muffler chambers.

9. The silencing device according to claim 2, characterized in that: The cylinder (1) is provided with mounting holes (13) at both ends along the axial direction; Wherein, the muffler device rotating assembly (3) further comprises: A rotating shaft (34), the rotating shaft (34) passing through the partition assembly (2) and mounted on the mounting holes (13) at both ends of the cylinder (1); A driving member (35) is drivably connected to the rotating shaft (34).

10. The silencing device according to any one of claims 1 to 9, characterized in that: The cylinder (1) comprises a perforated plate (14) and a sound absorbing material (15), the perforated plate (14) comprises a plurality of third holes (16), the sound absorbing material (15) is laid on the inner circumference of the cylinder (1), and the perforated plate (14) is attached to the sound absorbing material (15).

11. An engine exhaust system, characterized in that: include: Engine exhaust pipe; The silencer (4) according to any one of claims 2 to 10, arranged in the exhaust path of the engine exhaust pipe; A detection device (5) configured to obtain noise conditions of an exhaust port (12) of the muffler device (4); A processor (6) is connected to the muffler device and the detection device (5) by signals, and is configured to rotate the rotating assembly (3) according to the noise condition of the exhaust port (12) of the muffler device, so as to adjust the cross-sectional shape of each of the plurality of second holes (31) exposed relative to the first hole (21) and / or the number of the plurality of second holes (31) exposed relative to the first hole (21).

12. The engine exhaust system according to claim 11, characterized in that: The detection device (5) comprises: An engine detection unit, configured to obtain a state parameter of the engine at time t; A silencer detection unit, disposed at the exhaust port (12), configured to obtain environmental parameters of the exhaust port (12) at time t-1; The processor (6) is configured to determine the noise value of the exhaust port (12) at time t+1 based on the state parameters of the engine at time t and the environmental parameters of the exhaust port (12) at time t-1, and adjust the rotation state of the rotating component (3) according to the noise value.

13. A method for silencing an engine exhaust system according to any one of claims 1 to 12, characterized in that: include: Acquiring the noise condition of the exhaust port (12) of the muffler device; According to the noise condition of the exhaust port (12) of the silencer device, the rotating assembly (3) is rotated to adjust the cross-sectional shape of each of the plurality of second holes (31) exposed relative to the first hole (21) and / or the number of the plurality of second holes (31) exposed relative to the first hole (21).

14. The noise reduction method according to claim 13, wherein: According to the noise condition of the exhaust port (12) of the muffler device, the operation of rotating the rotating assembly (3) to adjust the cross-sectional shape of each of the plurality of second holes (31) exposed relative to the first hole (21) and / or the number of the plurality of second holes (31) exposed relative to the first hole (21) specifically comprises: If the noise frequency of the exhaust port (12) increases, the rotating assembly (3) is rotated to reduce the cross-sectional shape of each of the plurality of second holes (31) exposed relative to the first hole (21), and / or to increase the number of the plurality of second holes (31) exposed relative to the first hole (21); and If the noise frequency of the exhaust port (12) decreases, the rotating assembly (3) is rotated so that the cross-sectional shape of each of the plurality of second holes (31) exposed relative to the first hole (21) becomes larger, and / or the number of the plurality of second holes (31) exposed relative to the first hole (21) is reduced.

15. The noise elimination method according to claim 13, characterized in that: The operation of obtaining the noise condition of the exhaust port (12) of the muffler device specifically comprises: Acquiring state parameters of the engine at time t and environmental parameters of the exhaust port (12) at time t-1; Determining the noise value of the exhaust port (12) at time t+1 according to the state parameters of the engine at time t and the environmental parameters of the exhaust port (12) at time t-1; The rotation state of the rotating component (3) is adjusted according to the noise value of the exhaust port (12) at time t+1.

16. A computer-readable storage medium having a computer program stored thereon, wherein: When the program is executed by a processor (6), the deburring method according to any one of claims 13 to 15 is implemented.

Images