CN220955762U

CN220955762U - High-temperature exhaust muffler based on screen plate overcurrent array

Info

Publication number: CN220955762U
Application number: CN202322825354.7U
Authority: CN
Inventors: 孔伟涛; 张星; 詹华; 姜荣俊; 赵勇; 周超
Original assignee: Wuhan Yuanhai Bochuang Technology Co ltd; Ningbo Yuanhaibochuang Technology Co ltd
Current assignee: Wuhan Yuanhai Bochuang Technology Co ltd; Ningbo Yuanhaibochuang Technology Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-05-14
Anticipated expiration: 2033-10-20

Abstract

The utility model discloses a high-temperature exhaust muffler based on a screen plate overcurrent array, which comprises the following components: a muffler shell (1) for protecting and supporting internal materials and structures, a muffler inner core (2) arranged in the center of the muffler shell (1) and a muffler channel (3) arranged between the muffler shell (1) and the muffler inner core (2); the silencing channel (3) comprises an inner net (31) at the outermost layer, a net plate (32) arranged between the inner net (31) and the silencer inner core (2) and inner rings (33) arranged at two ends of the inner net (31), and sound waves mixed with waste gas in the channel are reflected back to the inlet; sound absorbing materials for assisting in absorbing other noise are arranged on two sides of the silencing channel (3). When the exhaust gas passes through the muffler, the high-temperature and high-speed exhaust gas passes through the muffler channel, and most sound waves are reflected to the inlet of the muffler. On the premise of ensuring the smooth discharge of the waste gas, the noise generated by the accompanying airflow is greatly reduced.

Description

High-temperature exhaust muffler based on screen plate overcurrent array

Technical Field

The embodiment of the utility model belongs to the technical field of mufflers, and particularly relates to a high-temperature exhaust muffler based on a screen plate overcurrent array.

Background

Exhaust gases from diesel engines, gasoline engines and gas engines have high flow rates and temperatures, with high noise levels associated with the exhaust process. In order to control exhaust noise, an exhaust muffler is generally provided. The existing impedance composite muffler has higher pressure loss, and as the heat insulation layer with enough thickness is not arranged in the muffler, the phenomenon that the shell is reddish often occurs after the muffler runs for a period of time, so that an maintainer is easy to scald and becomes the largest heat source in the system, and the heat dissipation burden is increased. In addition, the existing exhaust muffler is complicated in structure due to size limitation, further causes a large pressure loss, and is difficult to manufacture and process. Under the condition that the regenerated noise caused by the section wind speed does not influence the silencing effect, the longer the silencing channel is, the larger the silencing amount is. However, for compact diesel, gasoline engines and gas generators, it is unlikely to allocate a larger space for the muffler, and although the high-pressure exhaust muffler also adopts a multi-stage mesh plate, the high-pressure exhaust muffler is based on a dissipation principle and a small hole injection noise reduction principle, has extremely high pressure loss, and is difficult to apply to the fields of diesel engines and gasoline engines.

Disclosure of utility model

Aiming at the defects or improvement demands of the prior art, the utility model provides the high-temperature exhaust muffler based on the screen plate overcurrent array, which is characterized in that an array screen plate is arranged in a muffling channel, sound absorbing materials are filled at two sides of the channel, and the muffling channel is divided into a plurality of muffling expansion cavities connected in series, so that the gradual noise reduction is realized. Most sound waves in the exhaust gas are reflected to the inlet direction of the muffler by the array screen plate, and small parts of sound waves which are not transmitted in each muffling expansion cavity are absorbed by sound absorbing materials of the screen plate channels and the shell part in successive reflection, so that the noise of the engine is eliminated.

In order to achieve the above object, the present utility model adopts the following scheme, including:

A muffler shell for protecting and supporting internal materials and structures, a muffler inner core arranged in the center of the muffler shell, and a muffler channel arranged between the muffler shell and the muffler inner core;

The silencing channel comprises an inner net at the outermost layer, a net plate arranged between the inner net and the inner core of the silencer and inner rings arranged at two ends of the inner net, and sound waves mixed with exhaust gas in the channel are reflected back to the inlet;

And two sides of the silencing channel are provided with temperature-resistant sound-absorbing materials for assisting in absorbing other noise.

Further, the inner net is in a barrel shape with two through ends, through holes are uniformly formed along the outer surface of the barrel wall to form a sound absorption hole array, and the sound absorption hole array and the inner core of the muffler are concentrically arranged;

The screen plate is a plurality of, sets up quantity and interval according to the application needs, is the circular cone table cap column structure, and whole fretwork just both ends are penetrating below the conical surface, evenly opens the through-hole along the conical surface and constitutes the air vent array.

Further, the number, perforation diameter, perforation arrangement mode, perforation rate, installation angle, net shape and other characteristics of the net plate can be adjusted according to the required sound attenuation amount and the required pressure loss amount, so that higher noise reduction amount and lower pressure loss are realized.

Further, the muffler shell is characterized by comprising: and the shell and the flanges are arranged at the two ends of the shell.

Further, the flange is of a circular ring disc-shaped structure, a plurality of connecting holes are uniformly formed in the periphery of the flange, and the connecting holes are through holes.

Further, the muffler inner core comprises a main structure core net, a guide cone cap arranged at one end of the core net and a blocking plate arranged at the other end of the core net;

Further, the core net is in a barrel shape with two through ends, and holes are uniformly formed along the outer surface of the barrel wall to form a sound absorption hole array.

Further, the end where the guide cone cap is located is an air inlet of the muffler.

In general, the above technical solutions conceived by the present utility model, compared with the prior art, enable the following beneficial effects to be obtained:

1. According to the high-temperature exhaust muffler based on the screen plate overcurrent array, when exhaust gas generated by a diesel engine, a gasoline engine and a gas engine passes through the muffler, the high-temperature high-speed exhaust gas passes through the muffler channel to convert kinetic energy into pressure energy, and most sound waves are reflected to the inlet of the muffler. On the premise of ensuring the smooth discharge of the waste gas, the noise generated by the accompanying airflow is greatly reduced.

2. According to the utility model, the array screen plate arranged in the silencing channel is used for dividing the silencing channel into a plurality of silencing expansion cavities connected in series, so that the noise is reduced step by step, and the perforation area is increased by oblique arrangement of the array screen plate, so that the through-flow resistance is reduced. When the high-temperature high-flow-rate waste gas is rectified by each stage, most sound waves are reflected to return to the inlet direction of the muffler, so that most noise is eliminated.

3. The sound absorbing materials are arranged on two sides of the sound absorbing channel, when the waste gas passes through the silencer, the redundant noise energy which is not reflected back to the inlet of the silencer passes through the sound absorbing hole array and is absorbed by the sound absorbing materials, so that the noise is further reduced; meanwhile, the sound absorbing material has a heat preservation function, so that the shell can be prevented from overheating and scalding maintenance personnel, and the heat dissipation requirement of the system is reduced.

4. The characteristics of the screen plate, the perforation diameter, the perforation arrangement mode, the perforation rate, the installation angle, the mesh shape and the like can be adjusted according to the required sound attenuation amount and the required pressure loss so as to realize higher noise attenuation amount and lower pressure loss.

Drawings

FIG. 1 is a cross-sectional view of a high temperature exhaust muffler based on a mesh plate flow array according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a high temperature exhaust muffler based on a mesh plate flow array according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a square structure of a high temperature exhaust muffler based on a mesh plate flow array according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a square structure of a high-temperature exhaust muffler based on a mesh plate overcurrent array according to an embodiment of the utility model.

Like reference numerals denote like technical features throughout the drawings, in particular: 1-silencer shell, 11-shell, 12-flange, 2-silencer inner core, 21-core net, 22-cone-guiding cap, 23-blocking plate, 3-silencing channel, 31-inner net, 32-net plate and 33-inner ring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1, an embodiment of the present utility model provides a high temperature exhaust muffler based on a mesh plate array, which includes a muffler shell 1 protecting and supporting materials and structures inside, a muffler inner core 2 disposed at the center of the muffler shell 1, and a muffler channel 3 disposed between the muffler shell 1 and the muffler inner core 2. When the exhaust gas generated by the diesel engine, the gasoline engine and the gas engine passes through the muffler, the high-temperature high-speed exhaust gas passes through the muffler channel 3, the kinetic energy is converted into pressure energy, and most of sound waves are reflected to the inlet of the muffler. On the premise that the perforated area is increased by obliquely arranging the array meshes to ensure that the waste gas is smoothly discharged, the noise generated by the accompanying airflow is greatly reduced.

As shown in fig. 2, the muffler shell 1 includes a shell 11 and flanges 12 at both ends of the shell. Wherein, shell 11 is the transparent cask form in both ends, is rolled up by high temperature resistant alloy steel sheet and forms, and its hardness high strength is big, can support inside material and whole silencer structure, and the protection structure is used in adverse circumstances and is not seriously destroyed, and the temperature resistant sound absorbing material that cavity filled between shell 11 and net piece 31 can guarantee that the shell temperature is unlikely to scald personnel under high temperature environment, and can not appear obvious characteristic change in the use, improves greatly the stability in use of device. The flange 12 is of a circular disc structure, the outer diameter of the flange is the same as the diameter of the shell 11, a plurality of connecting holes are uniformly formed in the periphery of the flange, the connecting holes are through holes, and the connecting holes are fixedly connected to two ends of the shell 11. When connecting with other devices, bolts are used for fastening. The whole silencer structure is protected, and meanwhile, smooth connection with other devices can be ensured.

As shown in fig. 2, the muffler core 2 includes a core net 21 having a main structure, a cone cap 22 provided at one end of the core net 21, and a closure plate 23 provided at the other end of the core net 21. The core net 21 is in a drum shape with two transparent ends, through holes are uniformly formed along the outer surface of the drum wall to form a sound absorbing hole array, the sound absorbing hole array is formed by rolling stainless steel plates, galvanized plates, aluminum plates or other high-temperature-resistant nonmetallic materials, sound absorbing materials are plugged in the core net 21, and when waste gas passes through the silencer, redundant noise energy which is not reflected back to the silencer inlet passes through the sound absorbing hole array to be absorbed by the sound absorbing materials, so that noise is further reduced. The guide cone cap 22 is in a conical cap structure, the diameter of the bottom surface is the same as that of the core net 21, all the lower parts of the conical surface are hollowed out, the tip end of the guide cone cap is outwards fixed at one end of the core net 21, and the end with the guide cone cap 22 is also the inlet end of the whole muffler. When the exhaust gas enters the muffler, the cone cap 21 guides the air flow into the muffler channel 3, so that the damage of the sound absorbing material and the influence on the ventilation effect of the whole muffler caused by the high-temperature high-pressure air flow entering the core net 21 are avoided. The blocking plate 23 has a circular plate-shaped structure, the diameter of which is similar to that of the core net 21, and is fixed at the other end of the core net 21, and is used for blocking the sound absorbing material inside the core net 21, so as to prevent the sound absorbing material from leaking into the noise elimination channel 3 to block the noise elimination channel. The sound absorbing material is filled with the sound absorbing material, so that the sound absorbing effect of the muffler is enhanced, meanwhile, the sound absorbing material is prevented from losing efficacy due to high-temperature high-pressure air flow, and the sound absorbing material can be used as a mark for identifying the inlet and outlet ends of the muffler.

As shown in fig. 2, the sound damping channel 3 includes an outermost inner mesh 31, a mesh plate 32 disposed between the inner mesh 31 and the core mesh 21, and inner rings 33 disposed at both ends of the inner mesh 31. Wherein, the inner net 31 is a drum with two transparent ends, and the through holes are uniformly formed along the outer surface of the drum wall to form a sound absorbing hole array, and the sound absorbing hole array is concentrically arranged with the core net 21, and the diameter is the same as the inner diameter of the flange 12, and is formed by rolling stainless steel plates, galvanized plates, aluminum plates or other high-temperature-resistant nonmetallic materials. A heat-resistant sound-absorbing material is arranged between the inner net 31 and the outer shell 11, and when the exhaust gas passes through the silencer, the noise energy which is unnecessary and not reflected back to the inlet of the silencer passes through the sound-absorbing hole array to be absorbed by the sound-absorbing material, so that the noise is further reduced. The screen plate 32 is of a conical table cap structure, all lower parts of the conical surface are hollowed out, two ends of the conical surface are transparent, through holes are uniformly formed along the conical surface to form a vent hole array, and high-temperature and high-pressure waste gas is ensured to be smoothly discharged from the muffler. The small end faces the guide cone cap 22 when the screen plate 32 is fixed, and the large end faces the blocking plate 23, so that the effect of reflecting sound waves is guaranteed. The mesh plates 32 are uniformly fixed between the core mesh 21 and the inner mesh 31, uniformly divide the noise elimination channels 3 into a plurality of series noise elimination expansion strengths, and perform step-by-step noise reduction. When the high-temperature high-flow-rate waste gas is rectified by each stage, most sound waves are reflected to return to the inlet direction of the muffler, so that most noise is eliminated. The inner rings 33 are similar to the inner net 31 in structure, short in length, free of holes on the surface, and identical in diameter to the inner net 31, and the two inner rings 33 are respectively fixed at two ends of the inner net 31 and are fixed with the inner ends of the flanges 12 to form a closed structure. The core net 21 and the inner net 31 are supported by the net plate 32, so that the two are kept in fixed concentric relative positions.

Preferably, in order to reduce the flow velocity of the exhaust gas, the number, the perforation diameter, the perforation arrangement, the perforation ratio, the installation angle, the mesh shape, and other features of the mesh plate 32 may be adjusted according to the required sound attenuation amount and the required amount of the pressure loss, so as to achieve a higher noise reduction amount and a lower pressure loss. The pressure loss is often accompanied with the generation of noise, and reducing the pressure loss of the silencer can reduce the generation of noise, further improve the noise reduction effect of the silencer, reduce the vibration and the noise of equipment and improve the reliability of the equipment. In addition, due to the stroke problem of the engine, there is a possibility that non-extinguished sparks remain in the high-temperature and high-pressure exhaust gas, and when passing through the mesh plate 32, the sparks are extinguished after being blocked and are entrained by the high-speed gas to blow out of the muffler.

In another embodiment of the utility model, shown in fig. 3-4, a high temperature exhaust muffler based on a mesh plate array may also be square in structure, wherein the materials and basic principles used are identical except for the structural features, so as to be suitable for other machines with different installation spaces.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. A high temperature exhaust muffler based on a mesh plate overcurrent array, comprising:

A muffler shell (1) for protecting and supporting internal materials and structures, a muffler inner core (2) arranged in the center of the muffler shell (1) and a muffler channel (3) arranged between the muffler shell (1) and the muffler inner core (2);

The silencing channel (3) comprises an inner net (31) at the outermost layer, a net plate (32) arranged between the inner net (31) and the silencer inner core (2) and inner rings (33) arranged at two ends of the inner net (31), and sound waves mixed with waste gas in the channel are reflected back to the inlet;

Two sides of the silencing channel (3) are provided with temperature-resistant sound-absorbing materials for assisting in absorbing other noise.

2. The high-temperature exhaust muffler based on the mesh plate overcurrent array according to claim 1, wherein the inner mesh (31) and the muffler inner core (2) are concentrically arranged, are in a cylindrical shape with two through ends, and uniformly open holes along the outer surface of the barrel wall to form a sound absorbing hole array.

3. The high-temperature exhaust muffler based on the screen plate overcurrent array according to claim 2, wherein a plurality of screen plates (32) are in a conical table cap-shaped structure, all lower parts of the conical surfaces are hollowed out, two ends of the conical surfaces are transparent, and vent holes are uniformly formed along the conical surfaces to form a vent hole array;

The number of the mesh plates (32), the perforation diameter, the perforation arrangement, the perforation rate, the installation angle, the mesh shape and other characteristics are adjusted according to the required sound attenuation amount and the required pressure loss amount.

4. A high temperature exhaust muffler based on a mesh plate overcurrent array according to any one of claims 1 to 3, characterized in that the muffler housing (1) comprises a housing (11) and flanges (12) provided at both ends of the housing (11).

5. The high-temperature exhaust muffler based on the screen plate overcurrent array according to claim 4, wherein the flange (12) is of a circular disc-shaped structure, a plurality of connecting holes are uniformly formed in the periphery of the disc, and the connecting holes are through holes.

6. A high temperature exhaust muffler based on a mesh plate overcurrent array according to any one of claims 1 to 3, characterized in that the muffler core (2) comprises a main structure core net (21), a cone-guiding cap (22) provided at one end of the main structure core net (21), and a blocking plate (23) provided at the other end of the main structure core net (21).

7. The high-temperature exhaust muffler based on the screen plate overcurrent array according to claim 6, wherein the main structure core net (21) is in a cylindrical shape with two through ends, and the sound absorbing hole array is formed by uniformly opening holes along the outer surface of the barrel wall.

8. The high temperature exhaust muffler based on the mesh plate overcurrent array according to claim 6, wherein the end of the cone cap (22) is an air inlet of the muffler.