CN221002947U

CN221002947U - Silencer of generator set

Info

Publication number: CN221002947U
Application number: CN202322195634.4U
Authority: CN
Inventors: 廖丽瑕; 赖世鸿; 万径
Original assignee: Sichuan Simpower Equipment Co ltd
Current assignee: Sichuan Simpower Equipment Co ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-05-24
Anticipated expiration: 2033-08-15

Abstract

The utility model relates to a silencer of a generator set, which comprises a shell, wherein an air inlet and an air outlet are respectively arranged at two ends of the shell, an air outlet bent pipe is arranged on the air outlet, an air guide shutter group is arranged at the lower end of the air outlet bent pipe, a fixed plate is arranged at one side, close to the air inlet, in the shell, the interior of the shell is divided into a first expansion cavity and a second expansion cavity by the fixed plate, a plurality of inner connecting pipes are arranged on the fixed plate, the front ends of the inner connecting pipes are positioned in the first expansion cavity and are provided with first holes, the rear ends of the inner connecting pipes are positioned in the second expansion cavity and are provided with end plates, a plurality of second holes are arranged on the end plates, at least one layer of silencing sheet group is arranged in the second expansion cavity, the silencing sheet group comprises at least two silencing sheets which extend along the axial direction of the shell, an air flow channel is formed between the two silencing sheets, and sound absorbing materials are filled in the inner wall of the shell and the silencing sheets.

Description

Silencer of generator set

Technical Field

The utility model relates to the technical field of noise reduction, in particular to a generator set muffler.

Background

The generator set is high-strength noise equipment, and when the generator set operates, a large amount of tail gas is generated, the temperature of the tail gas is high, the air pressure is large, noise and pollution are generated, and the noise pollution is direct and has serious consequences. In order to reduce noise pollution of a generator set, a generator set silencer is usually arranged on the generator set, and the generator set silencer is a noise reducing device arranged on an airflow channel of a generator or in an air inlet and exhaust system, can block propagation of sound waves, allows airflow to pass through, and is an effective tool for controlling noise.

However, the existing silencer of the generator set is simple in structure, is fixedly installed on an airflow channel through a simple silencing pipe, and can reduce and absorb part of noise, but the overall noise reduction and silencing effect is poor, and the existing environment requirements cannot be met.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a silencer for a generator set, which solves the problem of poor noise reduction effect of the silencer for the generator set in the prior art.

The utility model provides a silencer for a generator set, which comprises a shell, wherein an air inlet and an air outlet are respectively arranged at two ends of the shell, an air outlet bent pipe is arranged on the air outlet, an air guide shutter group is arranged at the lower end of the air outlet bent pipe, a fixed plate is arranged at one side, close to the air inlet, of the shell, the interior of the shell is divided into a first expansion cavity and a second expansion cavity by the fixed plate, a plurality of inner connecting pipes are arranged on the fixed plate, the front ends of the inner connecting pipes are positioned in the first expansion cavity and are provided with first holes, the rear ends of the inner connecting pipes are positioned in the second expansion cavity and are provided with end plates, a plurality of second holes are formed in the end plates, at least one layer of silencing sheet group is arranged in the second expansion cavity, the silencing sheet group comprises at least two silencing sheets extending along the axial direction of the shell, an air flow channel is formed between the two silencing sheets, and sound absorbing materials are filled in the inner wall of the shell and the silencing sheets.

Further, the silencing sheet group is provided with three layers, and airflow channels of two adjacent layers of silencing sheet groups are staggered.

Further, the silencing sheet comprises a rectangular frame body with an opening at the front end and an opening at the rear end, conical guide plates extending towards the direction away from the rectangular frame body are arranged at the front end and the rear end of the rectangular frame body, and third holes are formed in the rectangular frame body and the conical guide plates.

Further, the air inlet is provided with a horn-shaped air inlet pipe, the small-diameter end of the air inlet pipe is provided with a flange, and the large-diameter end of the air inlet pipe is fixed with the shell.

Further, a guide cone is arranged on one side, close to the air inlet, of the fixing plate, the central axis of the guide cone and the central axis of the air inlet are coaxially arranged, and the inner connecting pipe is arranged around the guide cone.

Further, the shell comprises an outer shell and an inner shell, and a plurality of rib plates are arranged between the peripheral walls of the outer shell and the inner shell and are filled with sound absorbing materials.

Further, the length of the first expansion cavity in the axial direction of the shell is smaller than the length of the second expansion cavity in the axial direction of the shell. Further, the diameter of the inner connecting pipe is 80mm, and the aperture of the second hole is 5mm.

Further, the inner wall of the air outlet elbow is provided with a sound absorbing material.

Further, the sound absorbing material is heat-insulating rock wool and/or glass fiber cloth.

The utility model has the beneficial effects that the air flow enters from the air inlet of the shell and is discharged from the air outlet, the air outlet bent pipe arranged on the air outlet can change the direction of the air flow in the shell, the noise reduction effect on the air flow is enhanced, and the air flow noise of the air outlet is further reduced through the air guide shutter group at the lower end of the air outlet bent pipe. A fixing plate is arranged on one side, close to the air inlet, of the shell, the interior of the shell is divided into a first expansion cavity and a second expansion cavity by the fixing plate to form a plurality of expansion cavities which are connected in series, and therefore the sound attenuation is improved. The inner connecting pipe front end on the fixed plate is located in the first expansion cavity and is provided with a first hole, the rear end is located in the second expansion cavity and is provided with an end plate, a plurality of second holes are formed in the end plate, at the moment, after air flows enter the first expansion cavity through the air inlet, the mutation of the section of the pipeline causes the change of impedance, reflection and interference phenomena are generated, the noise of the air flows is primarily reduced, after the air flows pass through the inner connecting pipe, the air flows can be divided, a plurality of air flows are formed, the noise elimination frequency can be changed, the size of the inner connecting pipes is smaller, the high-frequency failure frequency is greatly improved, the high-frequency noise elimination effect is improved, and after the air flows enter the second expansion cavity through the second holes in the end plate, the noise reduction treatment is performed again. Through the end plate and the second hole on the end plate, the acoustic resistance is increased, the noise elimination frequency range is widened, and the sound absorption coefficient is improved. Through setting up at least one deck sound damping piece group in the second expansion intracavity, sound damping piece group includes two at least edges the axial extension's of casing sound damping piece, form the air current passageway between two sound damping pieces, the inside packing sound absorbing material of shells inner wall and sound damping piece, the air current passes through the air current passageway flow direction gas outlet, forms resistive noise elimination between air current and the sound damping piece group at this in-process, converts the sound energy into heat energy through frictional resistance and viscous force and gives off, improves the noise elimination effect of centering, high frequency.

According to the utility model, the casing is divided into the first expansion cavity and the second expansion cavity through the fixing plate to form a plurality of expansion cavities which are connected in series, and the resistance noise elimination principle is utilized to treat air flow noise, so that the noise elimination frequency can be improved. And a plurality of inner insertion pipes are arranged on the fixed plate, so that the noise elimination frequency is further changed, the noise reduction effect on high-frequency sound is improved, the end plate arranged at the air outlet end of the inner insertion pipes, the second holes on the end plate and the second expansion cavity behind the end plate jointly form a microperforated plate sound absorption structure, the sound absorption frequency is widened, and the sound absorption coefficient is improved. And a sound attenuation sheet group is arranged in the second expansion cavity to form a resistive sound attenuation structure, so that medium-frequency and high-frequency sound is further attenuated. And then the airflow direction is changed through the arranged air outlet bent pipe, so that the airflow noise of the air outlet is further reduced. By adopting the utility model, the air flow noise of the generator set can be obviously reduced, the noise reduction and silencing effects are good, and the ideal emission state can be achieved.

The utility model will be further described with reference to the drawings and the specific examples.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

FIG. 4 is a schematic view of the construction of an inner adapter of the present utility model;

fig. 5 is an enlarged detail view of a of fig. 4.

In the accompanying drawings: 1-shell, 11-air inlet, 12-air outlet, 13-shell, 14-inner shell, 15-rib plate, 2-air outlet bent pipe, 21-air guiding shutter group, 3-fixed plate, 31-guide cone, 4-first expansion cavity, 5-second expansion cavity, 6-inner connecting pipe, 61-first hole, 62-end plate, 63-second hole, 7-silencing sheet group, 71-silencing sheet, 711-rectangular frame, 712-conical guide plate, 713-third hole, 72-air flow channel, 8-air inlet pipe and 81-flange.

Detailed Description

Specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 5, the utility model provides a silencer of a generator set, which comprises a shell 1, specifically, the shell 1 comprises an outer shell 13 and an inner shell 14, a plurality of rib plates 15 are arranged between the peripheral walls of the outer shell 13 and the inner shell 14, and sound absorbing materials are filled in the rib plates. Through double-deck setting, not only strengthened the intensity of casing 1, and improved the treatment effect of air current noise. The sound absorbing materials filled between the peripheral walls of the outer shell 13 and the inner shell 14 can be made of glass fiber cloth and/or heat-insulating rock wool, so that the treatment efficiency of the silencer on air flow noise is improved, and heat in air flow can be isolated. The inner wall of the inner shell 14 can be provided with heat-insulating rock wool, and when the air passes through, the heat-insulating rock wool absorbs air flow noise by the principle of resistive noise elimination.

The two ends of the shell 1 are respectively provided with an air inlet 11 and an air outlet 12, the air inlet 11 is provided with a horn-shaped air inlet pipe 8, the small-diameter end of the air inlet pipe 8 is provided with a flange 81, the large-diameter end is fixed with the shell 1, and at the moment, air flows into the air inlet 11 through the air inlet pipe 8, and the flange 81 is used for being connected with external equipment.

The air outlet 12 is provided with the air outlet bent pipe 2, the lower end of the air outlet bent pipe 2 is provided with the air guide shutter group 21, air flow enters from the air inlet 11 of the shell 1 and is discharged from the air outlet 12, the air outlet bent pipe 2 arranged on the air outlet 12 can change the direction of the air flow in the shell 1, the noise reduction effect on the air flow is enhanced, and the air flow noise of the air outlet 12 is further reduced through the air guide shutter group 21 at the lower end of the air outlet bent pipe 2. Further, the inner wall of the air outlet elbow pipe 2 is provided with a sound absorbing material, so that air flow noise is further absorbed and reduced. Preferably, the bending angle between the air outlet elbow pipe 2 and the shell 1 is 90 degrees, so that the processing is convenient, and the noise reduction effect on noise can be improved.

The fixed plate 3 is arranged on one side, close to the air inlet 11, of the shell 1, the interior of the shell 1 is divided into a first expansion cavity 4 and a second expansion cavity 5 by the fixed plate 3, at the moment, the first expansion cavity 4 and the second expansion cavity 5 form a plurality of expansion cavities which are connected in series, the resistance noise elimination principle is utilized, the processing efficiency of air flow noise is improved, the change of impedance is caused by abrupt change of the section of a pipeline, reflection and interference phenomena are generated, and noise of the air flow noise is reduced. Preferably, the length of the first expansion chamber 4 in the axial direction of the housing 1 is smaller than the length of the second expansion chamber 5 in the axial direction of the housing 1, and the passing frequencies are staggered by the arrangement of the expansion chambers with different lengths, so that the noise elimination frequency characteristic is improved, and the noise elimination amount is improved.

Be equipped with a plurality of internal connection pipe 6 on the fixed plate 3, the front end of internal connection pipe 6 is located first expansion chamber 4 is interior and has seted up first hole 61, and the rear end is located second expansion chamber 5 is interior and is equipped with end plate 62, be equipped with a plurality of second hole 63 on the end plate 62, through the setting of internal connection pipe 6 for produce the cross-section mutation again between air current and the internal connection pipe 6 that get into in the first expansion chamber 4, and internal connection pipe 6 sets up a plurality ofly, and the size is less, makes high frequency failure frequency improve greatly, improves high frequency noise elimination effect. Furthermore, by arranging the end plate 62 and the second hole 63 on the end plate 62, the acoustic resistance is increased, the noise elimination frequency range is widened, and the sound absorption coefficient is improved. Preferably, the diameter of the inner joint pipe 6 is 80mm, the aperture size of the second hole 63 is 5mm, and the end plate 62, the second hole 63 and the second expansion cavity 5 together form a micro-perforated plate sound absorption structure, so that the sound absorption frequency is further widened, and the sound absorption coefficient is improved.

Further, a guide cone 31 is arranged on one side of the fixing plate 3, which is close to the air inlet 11, the tip of the guide cone 31 faces the air inlet 11, the central axis of the guide cone 31 and the central axis of the air inlet 11 are coaxially arranged, and the inner connecting pipe 6 is arranged around the guide cone 31. At this time, the airflow is guided and buffered by the guide cone 31, so that the speed of the airflow is reduced, the airflow can be expanded to the periphery, and the airflow can conveniently and uniformly enter the internal connecting pipe 6, and the processing efficiency of the airflow noise is improved.

At least one layer of silencing sheet set 7 is arranged in the second expansion cavity 5, the silencing sheet set 7 comprises at least two silencing sheets 71 extending along the axial direction of the shell 1, an air flow channel 72 is formed between the two silencing sheets 71, and sound absorbing materials are filled in the inner wall of the shell 1 and the inside of the silencing sheets 71. Specifically, the sound absorbing material in the present utility model may be provided as flame retardant rock wool and/or fiberglass cloth. In the process, resistive noise elimination is formed between the airflow and the noise elimination sheet set 7, and acoustic energy is converted into heat energy to be emitted through friction resistance and viscous force, so that the noise elimination effect of medium and high frequency is improved. Wherein, the silencing sheet 71 can be filled with heat-insulating rock wool and/or glass fiber cloth, thereby improving the treatment effect on airflow noise.

Further, the silencing sheet set 7 is provided with three layers, and the airflow channels 72 of two adjacent layers of silencing sheet sets 7 are staggered. With this arrangement, the air flow channels 72 of two adjacent layers are staggered, that is, when the air flow passes through the air flow channel 72 of the first layer and flows towards the air outlet 12, the air flow channel 72 of one layer corresponds to the silencing sheet 71, and is blocked by the silencing sheet 71 of the second layer, so that the air flow is blocked, a meandering flow direction is formed, the reflection times of sound waves in the shell 1 are increased, the contact opportunity of air flow noise and sound absorbing materials can be increased, and the silencing amount is improved.

Specifically, the muffler plate 71 includes a rectangular frame 711 with front and rear ends open, which is convenient for processing. The front and rear ends of the rectangular frame body 711 are respectively provided with a tapered baffle 712 extending away from the rectangular frame body 711, and the rectangular frame body 711 and the tapered baffle 712 are respectively provided with a third hole 713. In this manner, the tapered baffle 712 diverts the airflow, reducing drag losses. The provision of the third holes 713 further improves the effect of absorbing the air flow noise by the sound damping sheet 71.

According to the utility model, the inside of the shell 1 is divided into the first expansion cavity 4 and the second expansion cavity 5 through the fixing plate 3 to form a plurality of expansion cavities which are connected in series, and the resistance noise elimination principle is utilized to treat air flow noise, so that the noise elimination frequency can be improved. The fixed plate 3 is provided with a plurality of inner insertion pipes, so that the noise elimination frequency is further changed, the noise reduction effect on high-frequency sound is improved, the end plate 62 arranged at the air outlet end of the inner insertion pipes, the second holes 63 on the end plate 62 and the second expansion cavity 5 behind the end plate 62 jointly form a micropunching plate sound absorption structure, the sound absorption frequency is widened, and the sound absorption coefficient is improved. And a sound damping sheet group 7 is arranged in the second expansion cavity 5 to form a resistive sound damping structure, so that medium-frequency and high-frequency sound is further subjected to sound damping treatment. The air flow direction is changed through the arranged air outlet elbow pipe 2, so that the air flow noise of the air outlet 12 is further reduced. By adopting the utility model, the air flow noise of the generator set can be obviously reduced, the noise reduction and silencing effects are good, and the ideal emission state can be achieved.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The silencer of the generator set is characterized by comprising a shell (1), wherein an air inlet (11) and an air outlet (12) are respectively arranged at two ends of the shell (1), an air outlet elbow pipe (2) is arranged on the air outlet (12), an air guiding shutter group (21) is arranged at the lower end of the air outlet elbow pipe (2),

A fixed plate (3) is arranged on one side of the shell (1) close to the air inlet (11), the fixed plate (3) divides the interior of the shell (1) into a first expansion cavity (4) and a second expansion cavity (5),

A plurality of inner connecting pipes (6) are arranged on the fixed plate (3), the front ends of the inner connecting pipes (6) are positioned in the first expansion cavity (4) and provided with first holes (61), the rear ends of the inner connecting pipes are positioned in the second expansion cavity (5) and provided with end plates (62), a plurality of second holes (63) are arranged on the end plates (62),

At least one layer of silencing sheet group (7) is arranged in the second expansion cavity (5), the silencing sheet group (7) comprises at least two silencing sheets (71) extending along the axial direction of the shell (1), an air flow channel (72) is formed between the two silencing sheets (71), and sound absorbing materials are filled in the inner wall of the shell (1) and the inside of the silencing sheets (71).

2. The silencer of a generator set according to claim 1, wherein the silencing sheet sets (7) are provided with three layers, and airflow channels (72) of two adjacent layers of silencing sheet sets (7) are staggered.

3. The silencer for the generator set according to claim 1, wherein the silencing sheet (71) comprises rectangular frames (711) with front and rear ends open, conical guide plates (712) extending away from the rectangular frames (711) are arranged at the front and rear ends of the rectangular frames (711), and third holes (713) are formed in the rectangular frames (711) and the conical guide plates (712).

4. The silencer of the generator set according to claim 1, wherein a horn-shaped air inlet pipe (8) is arranged on the air inlet (11), a flange (81) is arranged at the small-diameter end of the air inlet pipe (8), and the large-diameter end is fixed with the shell (1).

5. The silencer of a generator set according to claim 1, characterized in that a guide cone (31) is arranged on one side of the fixing plate (3) close to the air inlet (11), the central axis of the guide cone (31) is coaxial with the central axis of the air inlet (11), and the inner connecting pipe (6) is arranged around the guide cone (31).

6. The silencer of a generator set according to claim 1, characterized in that the housing (1) comprises an outer housing (13) and an inner housing (14), wherein a plurality of rib plates (15) are arranged between the peripheral walls of the outer housing (13) and the inner housing (14) and are filled with sound absorbing materials.

7. A generator set muffler according to any one of claims 1-6, characterised in that the length of the first expansion chamber (4) in the axial direction of the housing (1) is smaller than the length of the second expansion chamber (5) in the axial direction of the housing (1).

8. A generator set muffler according to any one of claims 1-6, wherein the diameter of the inner pipe (6) is 80mm and the aperture of the second hole (63) is 5mm.

9. The silencer of a generator set according to any one of claims 1-6, characterized in that the inner wall of the outlet elbow (2) is provided with sound absorbing material.

10. The generator set muffler according to any one of claims 1 to 6, wherein the sound absorbing material is heat insulating rock wool and/or fiberglass cloth.