CN114320531A

CN114320531A - Exhaust silencer and all-terrain vehicle

Info

Publication number: CN114320531A
Application number: CN202011059945.2A
Authority: CN
Inventors: 张应清; 董林
Original assignee: Loncin Motor Co Ltd; Chongqing Longxin Engine Co Ltd
Current assignee: Loncin Motor Co Ltd; Chongqing Longxin Engine Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-12

Abstract

The invention discloses an exhaust silencer, which comprises a cylinder body, wherein a first pipeline is arranged at the air inlet end of the cylinder body, a spark collector is arranged at the air outlet end of the cylinder body, a plurality of cavities are sequentially separated from the inner cavity of the cylinder body along the direction from the air inlet end to the air outlet end through a plurality of partition plates in the cylinder body, the first pipeline is communicated with the cavity at the foremost end, the spark collector is communicated with the cavity at the rearmost end, at least one partition plate is provided with a silencing hole, and the hole wall of the silencing hole is arc-shaped in the thickness direction of the partition plate. By applying the exhaust silencer, the hole wall of the silencing hole is arc-shaped in the thickness direction of the partition plate, so that airflow can be uniformly dispersed to form convoluted airflow, the impact on the partition plate is weakened, the generation of radiation noise is reduced, and the noise reduction effect is more remarkable. In addition, the noise reduction holes are formed in the partition plate to reduce noise, an inner pipe is not required to be arranged, and the corresponding welding process is reduced. The invention also discloses an all-terrain vehicle with the exhaust muffler, and the all-terrain vehicle also has the technical effects.

Description

Exhaust silencer and all-terrain vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to an exhaust silencer and an all-terrain vehicle.

Background

Exhaust mufflers are used in all-terrain vehicles and other vehicles to connect with engines to reduce exhaust noise.

The inside of the exhaust silencer cylinder body adopts a three-pipe labyrinth exhaust silencer structure, and the front cavity and the rear cavity are connected in a mode of a partition plate and an inner pipe. A plurality of small round holes are arranged on the pipeline of the exhaust silencer to achieve the effects of noise elimination and noise reduction. However, small circular hole configurations are typically only effective in reducing mid-frequency noise.

In summary, how to effectively solve the problem of limited noise reduction effect of the exhaust muffler is a problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, a first object of the present invention is to provide an exhaust muffler having a structural design that can effectively solve the problem of the limited noise reduction effect of the exhaust muffler, and a second object of the present invention is to provide an all-terrain vehicle including the exhaust muffler.

In order to achieve the first object, the invention provides the following technical scheme:

the utility model provides an exhaust muffler, includes the barrel, the inlet end of barrel is provided with first pipeline, and the end of giving vent to anger is provided with the spark collector, will through a plurality of baffles in the barrel inner chamber is followed the inlet end extremely the direction of the end of giving vent to anger separates a plurality of cavities in proper order, just first pipeline with foremost the cavity intercommunication, the spark collector with rearmost the cavity intercommunication, at least one the hole of eliminating noise has been seted up on the baffle, the pore wall in the hole of eliminating noise is in be the arc and extends on the thickness direction of baffle.

Preferably, in the exhaust muffler, a hole wall of one side of the muffling hole is formed by the partition plate protruding backward in a curved surface manner, a hole wall of the other side of the muffling hole is formed by the partition plate protruding forward in a curved surface manner, and a channel allowing airflow to pass through is formed between the hole walls of the two sides.

Preferably, in the exhaust muffler, the hole walls on both sides are partially spherical.

Preferably, in the exhaust muffler, the inner cavity of the cylinder is sequentially divided into a first chamber, a second chamber, a third chamber and a fourth chamber along the direction from the air inlet end to the air outlet end by a first partition plate, a second partition plate and a third partition plate in the cylinder; one end of the first pipeline is open and extends into the second cavity, and a pipeline through hole is formed in the pipe wall of the first pipeline so as to be communicated with the first cavity; a second pipeline is arranged in the second chamber, and two ends of the second pipeline are open and respectively extend into the first chamber and the third chamber; the spark collector is communicated with the fourth cavity; the first partition plate is provided with a vent hole, and the third partition plate is provided with the silencing hole.

Preferably, in the exhaust muffler, a drain hole is formed at the lowest point of the cylinder, a sealing plug is detachably and hermetically connected with the drain hole, and an overflow hole is formed in the partition plate.

Preferably, in the exhaust muffler, the sealing plug is a drainage bolt.

Preferably, among the above-mentioned exhaust muffler, the spark collector include with the tail-hood of the end sealing connection of giving vent to anger of barrel, pass the tail-hood and with tail pipe, the suit of the sealed fixed connection of tail-hood outside of tubes and rear end with tail-hood fixed connection's braced frame with be fixed in the fireproof cap of braced frame front end, seted up fireproof cap through-hole and fixedly connected with cover on the terminal surface of fireproof cap the wire net of fireproof cap through-hole, fixedly connected with round wire net on the braced frame, be provided with a plurality of tail pipe through-holes on the tail pipe.

Preferably, in the exhaust muffler, a gasket is fixedly connected to a rear end of the supporting frame to form a seal with the tail cover.

Preferably, in the exhaust muffler, the front end of the first pipe is connected to the engine by a flange, and an included angle between the extending direction of the front end of the first pipe and a line connecting the bolts of the flange is greater than a preset value so as to expose the bolts.

The invention provides an exhaust silencer, which comprises a cylinder, a first pipeline, a spark collector and a plurality of clapboards. Wherein, first pipeline sets up in the inlet end of barrel, and the spark collector sets up in the end of giving vent to anger of barrel, separates a plurality of cavities in proper order with the barrel inner chamber along the direction of inlet end to the end of giving vent to anger through a plurality of baffles in the barrel, and just first pipeline and foremost cavity intercommunication, and the noise elimination hole has been seted up to spark collector and rearmost cavity intercommunication on at least one baffle, and the pore wall in noise elimination hole is the arc on the thickness direction of baffle.

By applying the exhaust silencer provided by the invention, airflow enters the cylinder body from the first pipeline, and is exhausted by the spark collector after the silencing effect of each cavity. Because the silencing holes are formed in at least one partition plate, and the hole walls of the silencing holes are arc-shaped in the thickness direction of the partition plate, namely the passing direction of the airflow, the airflow can be uniformly dispersed, the convoluted airflow is formed, the impact on the partition plate is weakened, the generation of radiation noise is reduced, and the noise reduction effect is more remarkable. In addition, the noise reduction holes are formed in the partition plate to reduce noise, an inner pipe is not required to be arranged, and the corresponding welding process is reduced.

To achieve the second object, the present invention also provides an all-terrain vehicle including any of the exhaust mufflers described above. Since the exhaust muffler has the technical effects, the all-terrain vehicle with the exhaust muffler also has the corresponding technical effects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of an exhaust muffler according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of various parts in the cylinder;

FIG. 3 is a perspective view of the spark arrestor;

FIG. 4 is a schematic cross-sectional view of a spark arrestor;

fig. 5 is a schematic structural view of an exhaust muffler and an engine in a mounted state.

The drawings are numbered as follows:

the device comprises a cylinder body 1, an end cover 2, a first pipeline 3, a first partition plate 4, a second pipeline 5, a second partition plate 6, a third partition plate 7, a first chamber 8, a second chamber 9, a third chamber 10, a fourth chamber 11, a drainage bolt 12, an overflow hole 13, a tail cover 14, a tail pipe 15, a fire-proof cap 16, a steel wire mesh 17, a support frame 18, a sealing gasket 19, an engine 20, a spark collector 21 and a silencing hole 22; the gas flow direction is shown by the two-dot chain line in the figure.

Detailed Description

The embodiment of the invention discloses an exhaust silencer, which is used for reducing radiation noise and improving the noise reduction effect.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, fig. 1 is a schematic cross-sectional view of an exhaust muffler according to an embodiment of the present invention; FIG. 2 is a schematic structural view of various parts in the cylinder; FIG. 3 is a perspective view of the spark arrestor; FIG. 4 is a schematic cross-sectional view of a spark arrestor; fig. 5 is a schematic structural view of an exhaust muffler and an engine in a mounted state.

In one embodiment, the present invention provides an exhaust muffler including a cylinder 1, a first pipe 3, a spark collector 21, and a plurality of partitions.

Wherein, the first pipeline 3 is arranged at the air inlet end of the cylinder body 1, and the spark collector 21 is arranged at the air outlet end of the cylinder body 1. The inner cavity of the cylinder body 1 is sequentially divided into a plurality of chambers along the direction from the air inlet end to the air outlet end by a plurality of partition plates in the cylinder body 1. The number of the specific partition plates can be set according to needs, and is not particularly limited herein. The air inlet end of the cylinder body 1 is specifically connected with an end cover 2 in a sealing mode, and the first pipeline 3 is fixed on the end cover 2 in a sealing mode. The spark arrester 21 has a tail cap 14 for sealing connection with the outlet end of the barrel 1. The specific structure of the cylinder 1 can refer to the corresponding arrangement of the conventional exhaust muffler, and is not described in detail herein.

The first conduit 3 communicates with the forwardmost chamber and the spark collector 21 communicates with the rearwardmost chamber. It should be noted that the front-back direction mentioned here and below corresponds to the direction from the air inlet end to the air outlet end, i.e. the front-back direction is the direction from the air inlet end to the air outlet end.

At least one partition board is provided with silencing holes 22, and the hole walls of the silencing holes 22 are arc-shaped in the thickness direction of the partition board. The air flow enters the chamber behind the baffle from the silencing holes 22 on the baffle in front of the baffle, and in the process, the hole walls of the silencing holes 22 are arc-shaped in the thickness direction of the baffle, so that the hole walls of the silencing holes 22 play a role in guiding the air flow. Here, the thickness direction of the partition, that is, the aforementioned front-rear direction. Compared with the conventional silencing holes which are linear in the front-back direction, such as cylindrical silencing holes, the silencing holes extend linearly in the front-back direction. This application sets up the pore wall to be the arc extension for the fore-and-aft direction, and the opening of noise elimination hole terminal surface is crisscross around on the baffle, makes the gaseous air current that circles round that forms of passing through, has reduced the radiation noise and has produced, and the noise reduction effect is more showing.

By applying the exhaust silencer provided by the invention, airflow enters the barrel 1 from the first pipeline 3, and is exhausted by the spark collector 21 after the silencing effect of each cavity. Because the silencing holes 22 are formed in at least one partition plate, and the hole walls of the silencing holes 22 are arc-shaped in the thickness direction of the partition plate, namely the passing direction of the air flow, the air flow can be uniformly dispersed, the convoluted air flow is formed, the impact on the partition plate is weakened, the generation of radiation noise is reduced, and the noise reduction effect is more remarkable. In addition, the noise reduction holes 22 are formed in the partition board to reduce noise, an inner pipe is not needed, corresponding welding processes are reduced, and cost control is facilitated.

Specifically, as shown in fig. 2, the wall of one side of the muffling hole 22 is formed by a partition plate protruding backward in a curved surface, the wall of the other side of the muffling hole is formed by a partition plate protruding forward in a curved surface, and a channel allowing airflow to pass through is formed between the walls of the two sides of the muffling hole. That is, the hole wall of one side of the silencing hole 22 protrudes backwards, the hole wall of the other side protrudes forwards, and both are curved surfaces, and a channel for air flow to pass through is arranged between the opposite curved surfaces. Therefore, the gas forms a swirling gas flow due to the guiding effect of the curved surface when passing through the gas guide plate. For unilateral hole wall, the structure can be similar to eyelid shape, i.e. cambered surface convex shape. Preferably, the two hole walls are symmetrically arranged.

Furthermore, the hole walls on the two sides are both local spherical surfaces so as to better form the swirling airflow. It should be noted that, the partial spherical surface herein refers to a portion of the hole wall that is a spherical surface, and the specific size of the portion may be set according to the need, and is not limited specifically here. The hole walls on the two sides can also be curved surfaces with other shapes according to requirements, and are not limited to spherical surfaces.

In each of the above embodiments, specifically, as shown in fig. 1, the inner cavity of the cylinder 1 is sequentially divided into a first chamber 8, a second chamber 9, a third chamber 10 and a fourth chamber 11 along the direction from the air inlet end to the air outlet end by a first partition plate 4, a second partition plate 6 and a third partition plate 7 in the cylinder 1; one end of the first pipeline 3 is open and extends into the second chamber 9, and a pipeline through hole is formed in the pipe wall of the first pipeline 3 so as to be communicated with the first chamber 8; a second pipeline 5 is arranged in the second chamber 9, and two ends of the second pipeline 5 are open and respectively extend into the first chamber 8 and the third chamber 10; the spark collector 21 communicates with the fourth chamber 11; the first clapboard 4 is provided with a vent hole, and the third clapboard 7 is provided with a silencing hole 22. The vent holes may be cylindrical holes, and the configuration of the muffling holes 22 may be any of the above-described embodiments. The three-pipe labyrinth exhaust silencer structure is adopted in the exhaust silencer cylinder body 1, airflow enters from the first pipeline 3, the airflow is divided into two parts, one part of the airflow enters the second cavity 9, the other part of the airflow enters the first cavity 8 through the pipeline through hole in the first pipeline 3, the airflow entering the second cavity 9 enters the first cavity 8 through the vent hole in the first partition plate 4, and the exhaust noise can be effectively reduced through airflow dispersion; the exhaust gas flow from the first chamber 8 through the second conduit 5 into the third chamber 10, which can be considered as an expansion chamber, further reducing noise; the exhaust gas flow then passes from the third chamber 10 through the silencing holes 22 in the third partition 7 into the fourth chamber 11 and finally out through the spark collector 21. The exhaust muffler with the structure has the advantages of simple structure and low production cost.

In order to conveniently remove residual moisture and residues in the barrel body 1, a drain hole is formed in the lowest point of the barrel body 1, a sealing plug is detachably and hermetically connected with the drain hole, and an overflow hole 13 is formed in the partition plate. The lowest point of the cylinder 1 may be set according to the shape of the cylinder 1 and the installation angle of the engine 20 in the installation state. Particularly, if the first chamber 8 is arranged on the side wall of the cylinder 1 corresponding to the first chamber and is positioned at the bottom end of the installation state. The sealing plug is detachably and hermetically connected with the drain hole, so that the drain hole is sealed during normal use, the sealing plug is opened when water is required to be prevented, and residual moisture and residues in the barrel body 1 can be conveniently removed. The concrete sealing plug can adopt the drainage bolt 12, and can also adopt other structures such as a sealing plug and the like according to requirements. The partition board is provided with overflow holes 13 to realize the communication of water flow by each chamber. The overflow holes 13 may be formed in the edge of the partition, at the bottom end in the installed state, as shown in fig. 2.

On the basis of the above embodiments, the spark collector 21 includes the tail cover 14 hermetically connected to the air outlet end of the barrel 1, the tail pipe 15 penetrating the tail cover 14 and hermetically and fixedly connected to the tail cover 14, the support frame 18 sleeved outside the tail pipe 15 and fixedly connected to the tail cover 14 at the rear end, and the fire cap 16 fixed to the front end of the support frame 18, the end surface of the fire cap 16 is provided with a fire cap through hole and fixedly connected to a steel wire mesh 17 covering the fire cap through hole, the support frame 18 is fixedly connected to a circle of steel wire mesh 17, and the tail pipe 15 is provided with a plurality of tail pipe through holes. That is, the spark arrestor 21 includes a tailpipe 15, a tail cap 14, a support frame 18, a fire cap 16, and a steel mesh 17. The rear end of the supporting frame 18 is fixedly connected with the tail cover 14, the front end of the supporting frame is fixedly connected with the fire-proof cap 16, the front end of the tail pipe 15 penetrates through the supporting frame 18, and the rear end of the tail pipe penetrates through the tail cover 14. The steel wire mesh fixed on the supporting frame 18 may be fixed outside the supporting frame or inside the supporting frame. The exhaust gas flow enters the spark collector 21 from the fourth chamber 11 in two parts, one part enters from the steel wire mesh 17 at the fire-proof cap 16, the other part enters from the steel wire mesh 17 at the support frame 18, enters the tail pipe 15 from a tail pipe through hole on the tail pipe 15, and then is discharged through the tail pipe 15. Adopt the fire cap 16 to couple together wire net 17, simultaneously with braced frame 18 and wire net 17 fixed connection, specifically can adopt the welding like spot welding fixed connection, wire net 17 can not warp, and outward appearance commodity nature is good, and has avoided warping the adverse effect to carminative, has prolonged its life.

Further, a gasket 19 is fixedly attached to the rear end of the support frame 18 to form a seal with the tail cap 14. The seal 19 may be a metal seal. The gasket 19 and the support frame 18 may be connected by conventional fixing means such as welding. By directly and fixedly connecting the sealing gasket 19 with the supporting frame 18, the spark collector 21 is disassembled without worrying about the neglected installation and damage of the sealing gasket 19, the disassembly is convenient, and the neglected installation of the sealing gasket 19 during the assembly is avoided.

On the basis of the above embodiments, the front end of the first pipe 3 is connected to the engine 20 by using the flange, and the extending direction of the front end of the first pipe 3 and the included angle α between the connection lines of the bolts of the flange are all larger than a preset value so as to expose the bolts. The existing exhaust muffler is connected with the engine 20 by a flange plate, and is influenced by the trend of an exhaust pipe, and most of the time, a pneumatic or electric tool cannot be quickly disassembled. Consequently, through with the blast pipe return bend in this application, the front end trend of first pipeline 3 sets up to become certain angle with the bolt installation line promptly, avoids pneumatic or electric tool and blast pipe to interfere to convenient quick dismantlement blast pipe improves time utilization. The size of the specific preset value, namely the included angle alpha between the extending direction of the front end of the first pipeline 3 and the connection line of the bolts of the flange plate, can be correspondingly set according to the size of the bolts, so that the front end of the first pipeline 3 is staggered with the bolts, and the shielding of the bolts is avoided.

Based on the exhaust muffler provided in the above embodiment, the present invention also provides an all-terrain vehicle including the exhaust muffler in any one of the above embodiments. Since the all-terrain vehicle employs the exhaust muffler in the above embodiment, please refer to the above embodiment for the beneficial effects of the all-terrain vehicle.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides an exhaust muffler, its characterized in that, includes the barrel, the inlet end of barrel is provided with first pipeline, and the end of giving vent to anger is provided with the spark collector, will through a plurality of baffles in the barrel inner chamber is followed the inlet end extremely the direction of the end of giving vent to anger separates a plurality of cavities in proper order, just first pipeline with foremost the cavity intercommunication, the spark collector with rearmost the cavity intercommunication, at least one the hole of eliminating noise has been seted up on the baffle, the pore wall in hole of eliminating noise is in be the arc extension on the thickness direction of baffle.

2. The exhaust muffler according to claim 1, wherein one side of the muffling hole is formed by the partition plate curved rearward and the other side thereof is formed by the partition plate curved forward, and a passage for allowing an air flow is formed between the side walls.

3. The exhaust muffler according to claim 2, wherein both side wall of the hole are partially spherical.

4. The exhaust silencer according to any one of claims 1 to 3, wherein the cylinder is internally divided into a first chamber, a second chamber, a third chamber and a fourth chamber by a first partition plate, a second partition plate and a third partition plate in sequence along the direction from the air inlet end to the air outlet end; one end of the first pipeline is open and extends into the second cavity, and a pipeline through hole is formed in the pipe wall of the first pipeline so as to be communicated with the first cavity; a second pipeline is arranged in the second chamber, and two ends of the second pipeline are open and respectively extend into the first chamber and the third chamber; the spark collector is communicated with the fourth cavity; the first partition plate is provided with a vent hole, and the third partition plate is provided with the silencing hole.

5. The exhaust muffler according to any one of claims 1 to 3, wherein a drain hole is formed at a lowest point of the cylinder, a sealing plug is detachably and sealingly connected to the drain hole, and an overflow hole is formed in the partition plate.

6. The exhaust muffler according to claim 5, wherein the sealing plug is a drain bolt.

7. The exhaust muffler according to any one of claims 1 to 3, wherein the spark collector includes a tail cover sealingly connected to the air outlet end of the cylinder, a tail pipe passing through the tail cover and sealingly and fixedly connected to the tail cover, a support frame sleeved outside the tail pipe and fixedly connected to the tail cover at the rear end, and a fire cap fixed to the front end of the support frame, wherein a fire cap through hole is formed in an end surface of the fire cap, a steel wire mesh covering the fire cap through hole is fixedly connected to the support frame, a circle of steel wire mesh is fixedly connected to the support frame, and a plurality of tail pipe through holes are formed in the tail pipe.

8. The exhaust muffler according to claim 7 wherein a gasket is fixedly attached to the rear end of the support frame to form a seal with the tail cap.

9. The exhaust muffler according to any one of claims 1 to 3, wherein the front end of the first pipe is connected to the engine by a flange plate, and the extending direction of the front end of the first pipe is greater than a predetermined angle with respect to a line connecting the bolts of the flange plate to expose the bolts.

10. An all-terrain vehicle, characterized in that it comprises an exhaust muffler according to any of claims 1-9.