Impedance silencing structure of engine silencer

Abstract

The utility model relates to the technical field of engines, in particular to an impedance silencing structure of an engine silencer, which comprises a casing and a support frame, an air guide structure is arranged at an air inlet of the casing, the support frame is arranged in the center of the inside of the casing, one side of the support frame close to the air inlet is in a circular ring shape, and the air guide structure is arranged in the casing. The side, close to the exhaust port, of the supporting frame is cylindrical, a first silencing structure and a second silencing structure are arranged on the inner side and the outer side of the circular ring end of the supporting frame respectively, and a third silencing structure is arranged in the cylindrical end of the supporting frame. When the device is used, air flow is guided through the fan to form outer side air and inner side air, sound of the two kinds of air can be weakened through the first sound absorption cotton and the second sound absorption cotton, then the two kinds of air are opposite in the fixed channel, the sound is further weakened, and then the sound is weakened through the silencing channel.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an impedance silencing structure of an engine muffler. Background Art

[0002] The engine can convert heat energy into power, thereby providing energy for the equipment. In order to fully burn the oil during the use of the engine, the gas and oil need to be fully mixed. When the airflow is discharged, sound will be generated. A muffler is needed to weaken the sound to avoid excessive noise during the use of the engine. However, general mufflers only use suction materials to absorb sound during use, resulting in poor silencing effect of the device. Summary of the invention

[0003] The purpose of the utility model is to provide an impedance silencing structure of an engine muffler to solve the problems raised in the above background technology.

[0004] An engine muffler impedance silencer structure comprises a shell and a support frame: an air guide structure is arranged at the air inlet of the shell, a support frame is arranged at the inner center of the shell, a side of the support frame close to the air inlet is in a circular shape, and a side of the support frame close to the exhaust port is in a cylindrical shape, a first silencer structure and a second silencer structure are arranged on the inner and outer sides of the circular end of the support frame respectively, and a third silencer structure is arranged inside the cylindrical end of the support frame.

[0005] Preferably, the air guide structure comprises a fixing frame and a fan, the fixing frame is arranged inside the shell, and the fan is arranged at equal angles inside the fixing frame.

[0006] When the device is in use, the exhaust gas of the engine will enter the interior of the shell, and then the gas will drive the fan to flow, so that most of the gas will move outward under the action of centrifugal force. At this time, most of the gas will move along the outside of the support frame.

[0007] Preferably, the first sound-absorbing structure includes a second sound-absorbing cotton, and the second sound-absorbing cotton is cylindrically arranged inside the support frame.

[0008] When the device is in use, the sound can be eliminated by the second sound-absorbing cotton, thereby weakening the sound.

[0009] Preferably, the second sound-absorbing structure includes a first sound-absorbing cotton and a support plate. The first sound-absorbing cotton is in a circular ring shape, and the support plate is arranged at equal angles on the side of the first sound-absorbing cotton. Main channels inclined outward are equidistantly opened inside the first sound-absorbing cotton, and the main channels are connected by branch channels.

[0010] When the device is in use, the first sound-absorbing cotton is limited by the support plate, and the first sound-absorbing cotton can weaken the sound, and the main channel is inclined. When the airflow moves along the main channel, it will cause the support plate to move, so that the first sound-absorbing cotton will vibrate locally, and the airflow in the main channel will flow through the branch channel, thereby reducing the sound.

[0011] Preferably, a fixing spring is connected to the side of the support plate, a limiting groove for the fixing spring and the support plate to be embedded is provided inside the shell, and a fixing plate is connected to the outer side of the limiting groove.

[0012] When the device is in use, the vibration of the support plate can be increased by the fixed spring, thereby converting the energy of the air into the kinetic energy of the fixed spring, thereby achieving the effect of reducing the sound.

[0013] Preferably, a first air inlet is opened at an equal angle on the outer side of the cylindrical end of the support frame, a second air inlet is opened at the center of the cylindrical end of the support frame, an arc-shaped fixed channel is connected between the first air inlet and the second air inlet, a silencer is arranged at the center of the fixed channel, and spherical grooves and circular grooves are alternately distributed inside the silencer.

[0014] When the device is in use, the outer airflow guided by the fan will enter the first air inlet, and the inner airflow will flow into the second air inlet. Then the gas will enter from both sides of the fixed channel, and then the two gases will cancel each other out. Then the gas will enter the inside of the silencer channel. The sound in the gas can be weakened again through the spherical groove and the circular groove, and then the gas will be discharged through the shell.

[0015] The beneficial effects of the utility model are:

[0016] 1. When the device is in use, the fan is used to guide the airflow to form outer and inner gases. The first sound-absorbing cotton and the second sound-absorbing cotton can weaken the sounds of the two gases respectively. Then, the two gases are made to collide in the fixed channel to further weaken the sound, and then the sound is weakened by the silencer channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the housing and the fixing frame of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the first sound-absorbing cotton of the utility model;

[0021] Figure 4 It is a schematic diagram of the connection structure of the fixed channel and the muffler channel of the utility model.

[0022] In the figure: 1. Shell; 2. Fixing frame; 3. Fan; 4. First sound-absorbing cotton; 5. Main channel; 6. Branch channel; 7. Support plate; 8. Fixing spring; 9. Fixing plate; 10. Second sound-absorbing cotton; 11. Support frame; 12. First air inlet; 13. Second air inlet; 14. Fixing channel; 15. Silencer channel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] When implementing: Figure 1-4 As shown, an impedance silencer structure of an engine silencer includes a shell 1 and a support frame 11; an air guide structure is arranged at the air inlet of the shell 1, and a support frame 11 is arranged at the inner center of the shell 1, the side of the support frame 11 close to the air inlet is in a circular shape, and the side of the support frame 11 close to the exhaust port is in a cylindrical shape, the inner and outer sides of the circular end of the support frame 11 are respectively provided with a first silencer structure and a second silencer structure, and a third silencer structure is arranged inside the cylindrical end of the support frame 11.

[0025] The air guide structure includes a fixing frame 2 and a fan 3. The fixing frame 2 is arranged inside the housing 1, and the fans 3 are arranged at equal angles inside the fixing frame 2.

[0026] When the device is in use, the exhaust gas of the engine will enter the interior of the shell 1, and then the gas will drive the fan 3 to flow, so that most of the gas moves outward under the action of centrifugal force. At this time, most of the gas will move along the outside of the support frame 11.

[0027] The first sound-absorbing structure includes a second sound-absorbing cotton 10 , which is cylindrical and arranged inside the support frame 11 .

[0028] When the device is in use, the second sound-absorbing cotton 10 can eliminate the sound, thereby weakening the sound.

[0029] The second sound-absorbing structure includes a first sound-absorbing cotton 4 and a support plate 7. The first sound-absorbing cotton 4 is in a circular shape. The support plate 7 is arranged at equal angles on the side of the first sound-absorbing cotton 4. The interior of the first sound-absorbing cotton 4 is provided with main flow channels 5 inclined outward at equal intervals. The main flow channels 5 are connected by branch flow channels 6.

[0030] When the device is in use, the first sound-absorbing cotton 4 is limited by the support plate 7, and the first sound-absorbing cotton 4 can weaken the sound, and the main channel 5 is inclined. When the airflow moves along the main channel 5, it will cause the support plate 7 to move, so that the part of the first sound-absorbing cotton 4 vibrates, and the airflow in the main channel 5 will flow through the branch channel 6, thereby reducing the sound.

[0031] A fixing spring 8 is connected to the side of the support plate 7 , and a limiting groove for the fixing spring 8 and the support plate 7 to be embedded is provided inside the housing 1 , and a fixing plate 9 is connected to the outer side of the limiting groove.

[0032] When the device is in use, the vibration of the support plate 7 can be increased by fixing the spring 8, thereby converting the energy of the air into the kinetic energy of the fixed spring 8, thereby achieving the effect of reducing the sound.

[0033] A first air inlet 12 is provided at an equal angle on the outer side of the cylindrical end of the support frame 11, and a second air inlet 13 is provided at the center of the cylindrical end of the support frame 11. An arc-shaped fixed channel 14 is connected between the first air inlet 12 and the second air inlet 13. A silencer channel 15 is provided at the center of the fixed channel 14, and spherical grooves and circular grooves are alternately distributed inside the silencer channel 15.

[0034] When the device is in use, the outer airflow guided by the fan 3 will enter the first air inlet 12, and the inner airflow will flow into the second air inlet 13. Then the gas will enter from both sides of the fixed channel 14, and then the two gases will cancel each other out. Then the gas will enter the silencer channel 15. The sound in the gas can be weakened again through the spherical groove and the circular groove, and then the gas will be discharged through the shell 1.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An engine muffler impedance silencing structure, characterized in that: The invention comprises a shell (1) and a support frame (11); an air guide structure is arranged at the air inlet of the shell (1); a support frame (11) is arranged at the inner center of the shell (1); a side of the support frame (11) close to the air inlet is in a circular ring shape; a side of the support frame (11) close to the air outlet is in a cylindrical shape; a first silencer structure and a second silencer structure are arranged at inner and outer sides of the circular ring end of the support frame (11), respectively; and a third silencer structure is arranged inside the cylindrical end of the support frame (11).

2. The engine muffler impedance silencing structure according to claim 1, characterized in that: The air guide structure comprises a fixing frame (2) and a fan (3); the fixing frame (2) is arranged inside the housing (1); and the fan (3) is arranged at equal angles inside the fixing frame (2).

3. The engine muffler impedance silencing structure according to claim 1, characterized in that: The first sound-absorbing structure comprises a second sound-absorbing cotton (10), and the second sound-absorbing cotton (10) is arranged in a cylindrical shape inside the support frame (11).

4. The engine muffler impedance silencing structure according to claim 1, characterized in that: The second sound-absorbing structure comprises a first sound-absorbing cotton (4) and a support plate (7); the first sound-absorbing cotton (4) is in the shape of a ring; the support plate (7) is arranged at equal angles on the side of the first sound-absorbing cotton (4); main flow channels (5) inclined outward are arranged at equal intervals inside the first sound-absorbing cotton (4); and the main flow channels (5) are connected to each other via branch flow channels (6).

5. The engine muffler impedance silencing structure according to claim 4, characterized in that: A fixing spring (8) is connected to the side of the support plate (7), a limiting groove for the fixing spring (8) and the support plate (7) to be embedded is provided inside the housing (1), and a fixing plate (9) is connected to the outside of the limiting groove.

6. The engine muffler impedance silencing structure according to claim 1, characterized in that: A first air inlet (12) is provided at an equal angle on the outer side of the cylindrical end of the support frame (11), a second air inlet (13) is provided at the center of the cylindrical end of the support frame (11), an arc-shaped fixed channel (14) is connected between the first air inlet (12) and the second air inlet (13), a muffler channel (15) is provided at the center of the fixed channel (14), and spherical grooves and circular grooves are alternately distributed inside the muffler channel (15).

Images