Self-excitation jet oscillation silencer

Abstract

The utility model relates to the technical field of silencing devices, in particular to a self-excitation jet oscillation silencer which comprises a cooling shell, a silencing shell arranged on the cooling shell and a silencing assembly arranged on the silencing shell. The cooling shell comprises a liquid shell cavity, a cooling cavity is formed in the liquid shell cavity, and the liquid shell cavity is provided with a liquid inlet and a liquid outlet which are communicated with the cooling cavity; the silencing shell comprises a gas shell cavity arranged in the liquid shell cavity, and the gas shell cavity communicates with a gas inlet pipe and a gas outlet pipe which penetrate through the liquid shell cavity. The silencing assembly comprises a first-stage silencing pipe arranged on the silencing shell, a plurality of airflow oscillators connected to the first-stage silencing pipe and a first-stage silencing plate, and a plurality of first-stage silencing holes are formed in the first-stage silencing plate. Cooling liquid is introduced into the liquid shell cavity through the liquid inlet to fill the liquid shell cavity so as to form a cooling environment for cooling, the silencing assembly is used for silencing gas, and the gas is silenced and cooled on the basis that the silencer is compact in structure.

Description

Technical Field

[0001] This application relates to the field of silencer technology, and in particular to a self-excited jet oscillation silencer. Background Technology

[0002] Internal combustion engines produce significant exhaust noise and high exhaust temperatures during operation, which is typically suppressed using mufflers. Traditional mufflers rely on the sound absorption and scattering properties of materials and the extended resonance of the structure to reduce noise. However, this method has limited effectiveness in controlling noise at specific frequencies and is difficult to reduce exhaust temperature. Liquid-cooled mufflers use a circulating cooling water jacket to cover and suppress noise on the muffler surface and pipes. While this provides better noise control, conventional liquid-cooled mufflers require a separate water-cooling box, occupying a large space and resulting in higher costs. This presents a challenge in balancing noise control and cost. Utility Model Content

[0003] In order to improve the problem of noise control and cost in the existing silencers, this utility model provides a self-excited jet oscillation silencer.

[0004] A self-excited jet oscillation silencer includes a cooling housing, a silencer housing disposed on the cooling housing, and a silencer assembly disposed on the silencer housing. The cooling housing includes a liquid shell cavity containing a cooling chamber, and the liquid shell cavity is provided with an inlet and an outlet communicating with the cooling chamber. The silencer housing includes a gas shell cavity disposed within the liquid shell cavity, and the gas shell cavity is connected to an inlet pipe and an outlet pipe passing through the liquid shell cavity. The silencer assembly includes a primary silencer pipe disposed on the silencer housing, a plurality of airflow oscillators connected to the primary silencer pipe, and a primary silencer plate, the primary silencer plate having a plurality of primary silencer holes.

[0005] Furthermore, the airflow oscillator includes a main body, one end of which has an airflow nozzle connected to the first-stage silencer pipe, the size of which gradually decreases along the air intake direction; the other end of the main body is provided with a throat outlet and a jet nozzle in sequence, the size of which gradually decreases along the air outlet direction, and the jet nozzle is trumpet-shaped, the size of which gradually increases along the air outlet direction.

[0006] Furthermore, a gas side flow channel and a gas mixing channel are provided between the airflow nozzle and the throat outlet. There are two gas side flow channels, which are located on both sides of the gas mixing channel. There is a gap between the gas mixing channel and the gas mixing channel.

[0007] Furthermore, the gas mixing channel includes an inclined section, a vertical section, and an arc section connected in sequence, with the size of the inclined section gradually increasing along the length of the main body.

[0008] Furthermore, a plurality of the airflow oscillators are laid along the length of the primary silencer pipe; the plurality of the airflow oscillators are located between the primary silencer pipe and the primary silencer plate.

[0009] Furthermore, the noise reduction assembly also includes a secondary noise reduction plate and a secondary noise reduction pipe, wherein the secondary noise reduction plate and the secondary noise reduction pipe are located on the side of the primary noise reduction plate away from the airflow oscillator.

[0010] Furthermore, the cooling housing also includes a guide plate disposed in the liquid cavity, the guide plate being laid along the circumferential direction of the liquid cavity.

[0011] This utility model has the following advantages:

[0012] 1. This utility model discloses a self-excited jet oscillation silencer, which utilizes an inlet to introduce coolant into a liquid shell cavity to fill the cavity and create a cooling environment. Gas introduced into the silencer shell then enters the primary silencer pipe, airflow oscillator, and primary silencer plate for noise reduction. Simultaneously, because the silencer shell is located within a cooling shell, the gas temperature is lowered in the cooling environment. Furthermore, the liquid environment further blocks gas noise, thus further reducing the noise of the gas introduced into the silencer shell. By incorporating a cooling shell, a silencer shell, and silencer components, the silencer can effectively reduce noise and cool the gas while maintaining a compact structure, thereby balancing noise control and cost.

[0013] 2. The present invention relates to a self-excited jet oscillation silencer. The airflow oscillator is configured with a gas side flow channel and a gas mixing channel. After the gas enters the airflow oscillator, it will enter through the gas side flow channel and the gas mixing channel. The gas entering the gas side flow channel will flow back and mix with the gas in the gas mixing channel. The gas will oscillate within a specific frequency range, causing the sound waves of a specific frequency to interfere with each other destructively, thereby reducing the noise level. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a self-excited jet oscillation silencer according to an embodiment of this application;

[0016] Figure 2 This is a side view of a self-excited jet oscillation silencer according to an embodiment of this application;

[0017] Figure 3 for Figure 2 Cross-sectional view along the AA direction;

[0018] Figure 4 This is a schematic diagram of an airflow oscillator in a self-excited jet oscillation silencer according to an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Cooling shell; 11. Liquid shell cavity; 12. Liquid inlet; 13. Liquid outlet; 14. Baffle plate; 2. Silencing shell; 21. Gas shell cavity; 22. Inlet pipe; 23. Outlet pipe; 3. Silencing assembly; 31. Primary silencer pipe; 32. Airflow oscillator; 321. Main body; 322. Airflow nozzle; 323. Throat outlet; 324. Injector; 325. Gas side flow channel; 326. Gas mixing channel; 3261. Inclined section; 3262. Vertical section; 3263. Arc section; 33. Primary silencer plate; 34. Secondary silencer plate; 35. Secondary silencer pipe. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Reference Figure 1 , Figure 2 as well as Figure 3 A self-excited jet oscillation silencer includes a cooling housing 1, a silencer housing 2 disposed on the cooling housing 1, and a silencer assembly 3 disposed on the silencer housing 2. The silencer assembly 3 is used to oscillate and silence the gas. Coolant is filled between the cooling housing 1 and the silencer housing 2 to further silence and cool the gas in the silencer housing 2.

[0026] Specifically, the cooling housing 1 includes a liquid shell cavity 11, which is located on the outermost side. The liquid shell cavity 11 contains a cooling chamber. The liquid shell cavity 11 is provided with an inlet 12 and an outlet 13 communicating with the cooling chamber. The inlet 12 is located above the liquid shell cavity 11, and the outlet 13 is located below the liquid shell cavity 11. Coolant is introduced into the liquid shell cavity 11 through the inlet 12, thus filling the cooling chamber and creating a cooling environment. The cooling housing 1 also includes a guide plate 14 disposed in the liquid shell cavity 11. The guide plate 14 is laid along the circumferential direction of the liquid shell cavity 11, and can guide the coolant to flow in a predetermined direction.

[0027] The silencing housing 2 includes a gas chamber 21 disposed within a liquid chamber 11. The gas chamber 21 is connected to an inlet pipe 22 and an outlet pipe 23 that pass through the liquid chamber 11. The connections between the inlet pipe 22, the outlet pipe 23, and the cooling housing 1 and the silencing housing 2 are fully sealed welded. The silencing housing 2 is located within the cooling housing 1. When gas is introduced into the silencing housing 2 through the inlet pipe 22, the gas will always be in a cooling environment for cooling. At the same time, since the cooling environment can impede the propagation of sound, it can further suppress the noise of the gas.

[0028] The silencing assembly 3 includes a primary silencing pipe 31 disposed in the silencing housing 2, a plurality of airflow oscillators 32 connected to the primary silencing pipe 31, and a primary silencing plate 33. The primary silencing pipe 31 is rectangular in shape and is horizontally arranged. The air inlet pipe 22 is connected to one end of the primary silencing pipe 31 along its length. When gas enters the primary silencing pipe 31, it will vibrate in the primary silencing pipe 31. During the vibration process, the energy of the gas is consumed and enters the airflow oscillators 32.

[0029] Reference Figure 3 as well as Figure 4 Several airflow oscillators 32 are laid along the length of the primary silencer duct 31; the airflow oscillators 32 are located between the primary silencer duct 31 and the primary silencer plate 33. Each airflow oscillator 32 includes a main body 321. One end of the main body 321 has an airflow nozzle 322 communicating with the primary silencer duct 31, and the size of the airflow nozzle 322 gradually decreases along the air inlet direction. The other end of the main body 321 is sequentially provided with a throat outlet 323 and a jet nozzle 324. The size of the throat outlet 323 gradually decreases along the air outlet direction, and the jet nozzle 324 is funnel-shaped, with its size gradually increasing along the air outlet direction. By arranging the airflow nozzle 322, throat outlet 323, and jet nozzle 324 in this way, gas enters the airflow nozzle 322 with accelerated entry. When the gas passes through the throat outlet 323 and jet nozzle 324, the gradually decreasing size of the throat outlet 323 obstructs the gas flow, causing the gas to remain in the airflow oscillator 32 for a longer time before being discharged through the jet nozzle 324.

[0030] A gas side flow channel 325 and a gas mixing channel 326 are provided between the airflow nozzle 322 and the throat outlet 323. In this embodiment, there are two gas side flow channels 325, which are located on both sides of the gas mixing channel 326 respectively; there is a gap between the gas mixing channel 326 and the gas mixing channel 326. The gas mixing channel 326 includes an inclined section 3261, a vertical section 3262, and an arc section 3263 connected in sequence, and the size of the inclined section 3261 gradually increases along the length of the main body 321. By setting the gas flow channel and the gas mixing channel 326 in this way, after the gas enters the airflow oscillator 32, it will enter through the gas flow channel and the gas mixing channel 326. The gas entering the gas flow channel will flow back and mix with the gas in the gas mixing channel 326. The gas will oscillate within a specific frequency range, causing the sound waves of a specific frequency to interfere destructively, thereby reducing the noise level.

[0031] The primary silencer plate 33 is located on the side of the airflow oscillator 32 away from the primary silencer pipe 31. The primary silencer plate 33 is horizontally positioned and has several primary silencer holes. The injection port 324 faces the primary silencer plate 33. When gas is ejected from the injection port 324, it will be sprayed onto the primary silencer plate 33. The primary silencer holes obstruct the gas, thereby consuming the gas's energy to reduce noise. In addition, the silencer assembly 3 also includes a secondary silencer plate 34 and a secondary silencer pipe 35. The secondary silencer plate 34 and the secondary silencer pipe 35 are located on the side of the primary silencer plate 33 away from the airflow oscillator 32. The secondary silencer plate 34 is horizontally positioned and has several secondary silencer holes. The secondary silencer pipe 35 is located on the side of the secondary silencer plate 34 away from the primary silencer plate 33. The pipe wall of the secondary silencer pipe 35 has several micro-hole air outlets to buffer and reduce the noise of the gas. The air outlet pipe 23 is connected to one end of the secondary silencer pipe 35 along its length. After the gas undergoes multiple stages of oscillation, noise reduction and cooling, it is discharged from the air outlet pipe 23.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A self-excited jet oscillation silencer, characterized in that, The system includes a cooling housing (1), a silencing housing (2) disposed in the cooling housing (1), and a silencing assembly (3) disposed in the silencing housing (2). The cooling housing (1) includes a liquid shell cavity (11), which has a cooling chamber. The liquid shell cavity (11) is provided with an inlet (12) and an outlet (13) communicating with the cooling chamber. The silencing housing (2) includes a gas shell cavity (21) disposed in the liquid shell cavity (11). The gas shell cavity (21) is connected to an air inlet pipe (22) and an air outlet pipe (23) passing through the liquid shell cavity (11). The silencing assembly (3) includes a primary silencing pipe (31) disposed in the silencing housing (2), a plurality of airflow oscillators (32) connected to the primary silencing pipe (31), and a primary silencing plate (33). The primary silencing plate (33) has a plurality of primary silencing holes.

2. The self-excited jet oscillation silencer according to claim 1, characterized in that, The airflow oscillator (32) includes a main body (321), one end of which has an airflow nozzle (322) connected to the first-stage silencer (31), the size of which gradually decreases along the air intake direction; the other end of the main body (321) is provided with a throat outlet (323) and a jet nozzle (324) in sequence, the size of which gradually decreases along the air outlet direction, and the jet nozzle (324) is trumpet-shaped, the size of which gradually increases along the air outlet direction.

3. The self-excited jet oscillation silencer according to claim 2, characterized in that, A gas side flow channel (325) and a gas mixing channel (326) are provided between the airflow nozzle (322) and the throat outlet (323). There are two gas side flow channels (325), which are located on both sides of the gas mixing channel (326). There is a gap between the gas mixing channel (326) and the gas mixing channel (326).

4. A self-excited jet oscillation silencer according to claim 3, characterized in that, The gas mixing channel (326) includes an inclined section (3261), a vertical section (3262), and an arc section (3263) connected in sequence. The size of the inclined section (3261) gradually increases along the length of the main body (321).

5. A self-excited jet oscillation silencer according to any one of claims 1-4, characterized in that, A plurality of the airflow oscillators (32) are laid along the length of the primary silencer pipe (31); the plurality of the airflow oscillators (32) are located between the primary silencer pipe (31) and the primary silencer plate (33).

6. A self-excited jet oscillation silencer according to claim 5, characterized in that, The silencing component (3) further includes a secondary silencing plate (34) and a secondary silencing pipe (35), wherein the secondary silencing plate (34) and the secondary silencing pipe (35) are located on the side of the primary silencing plate (33) away from the airflow oscillator (32).

7. A self-excited jet oscillation silencer according to claim 1, characterized in that, The cooling housing (1) further includes a guide plate (14) disposed in the liquid cavity (11), the guide plate (14) being laid along the circumferential direction of the liquid cavity (11).

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