CN214366287U

CN214366287U - Large-displacement motorcycle silencer

Info

Publication number: CN214366287U
Application number: CN202120302212.0U
Authority: CN
Inventors: 杨富周; 佘凤麒; 何恭进
Original assignee: Zhaoqing City Gaoyao District Kangcheng Hardware Co ltd
Current assignee: Zhaoqing City Gaoyao District Kangcheng Hardware Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-10-08
Anticipated expiration: 2031-02-03

Abstract

The utility model provides a large-displacement motorcycle silencer, which comprises a front connecting component, an outer cylinder and a tail connecting component which are connected in sequence; the silencer also comprises a silencing component arranged in the outer cylinder body; the silencing component comprises a porous net barrel, a supporting clapboard, a porous pipe, a silencing clapboard and at least two porous flat pipes; the inner cavity of the outer cylinder is divided into a first silencing cavity and a second silencing cavity by the supporting partition plate and the silencing partition plate; the porous pipe is inserted in the supporting clapboard through the connecting pipe and is positioned in the first silencing cavity; the porous flat pipe is inserted on the silencing partition plate and positioned in the second silencing cavity, and the porous flat pipe is communicated with the first silencing cavity and the second silencing cavity; one end of the tail joint component extends into the second silencing cavity, and the other end of the tail joint component is arranged outside the outer cylinder body as an exhaust end; the porous net cylinder is arranged on the inner wall of the outer cylinder body and is fixed through the supporting partition plate. The utility model has the advantages of reasonable design, the noise elimination is effectual and noise elimination performance is good, can realize reducing the noise pollution that the motorcycle caused, is favorable to using and promoting in the motorcycle of big discharge capacity very much.

Description

Large-displacement motorcycle silencer

Technical Field

The utility model relates to a mechanical noise eliminator, more specifically say, relate to a large discharge capacity motorcycle silencer.

Background

The muffler is a transition device connecting the engine and the atmosphere, has the functions of allowing exhaust gas to pass through, attenuating noise and reducing the amount of exhaust pollutants, is one of important parts of the motorcycle, and not only affects the noise and the emission of the motorcycle, but also has great influence on the performances of the engine, such as power, torque, oil consumption and the like.

The silencer is a device for reducing the noise of airflow, is arranged in a pipeline or on an air inlet and an air outlet, has certain reduction effect on the noise when the airflow passes through, and has the performance mainly comprising three aspects:

firstly, silencing performance including the size and the frequency spectrum characteristic of silencing quantity;

second, aerodynamic performance, usually expressed in terms of the total pressure difference between the muffler inlet and outlet;

and thirdly, the structural performance refers to the external dimension, the firmness, the maintenance requirement, the service life and the like of the composite material.

Evaluating the performances of the three aspects of the silencer, wherein the performances are mutually connected and mutually restricted, and the larger the silencing quantity in a required frequency range is, the better the silencing performance of the silencer is; but at the same time the requirements for aerodynamic performance must be taken into account.

The existing motorcycle silencer has the problems of short buffering route, poor noise reduction effect, substandard tail gas treatment and the like. The main reasons are that the silencer has insufficient internal space, short buffering route and unreasonable structural design, which causes the unobvious and unsatisfactory silencing effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a large-displacement motorcycle silencer; the motorcycle silencer has the advantages of reasonable structural design, good silencing effect and good silencing performance, can reduce noise pollution caused by the motorcycle, and is particularly favorable for being used and popularized in the large-displacement motorcycle.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a large-displacement motorcycle muffler is characterized in that: the device comprises a front connection assembly, an outer cylinder and a tail connection assembly which are connected in sequence; the silencer also comprises a silencing component arranged in the outer cylinder body; the silencing assembly comprises a porous net barrel, a supporting clapboard for supporting the porous net barrel, a porous pipe, a silencing clapboard and at least two porous flat pipes;

the inner cavity of the outer cylinder is divided into a first silencing cavity and a second silencing cavity by the supporting partition plate and the silencing partition plate; the porous pipe is connected with the front connection assembly through a connecting pipe, and the porous pipe is inserted in the supporting partition plate through the connecting pipe and is positioned in the first silencing cavity; the porous flat pipe is inserted on the silencing partition plate and positioned in the second silencing cavity, and the porous flat pipe is communicated with the first silencing cavity and the second silencing cavity; one end of the tail joint component extends into the second silencing cavity, and the other end of the tail joint component is arranged outside the outer cylinder body as an exhaust end; the porous net cylinder is arranged on the inner wall of the outer cylinder body and is fixed through the supporting partition plate.

The wall of the porous net cylinder is provided with a plurality of groups of silencing holes; the plurality of groups of silencing holes are arranged along the length direction of the porous net barrel.

The outer wall of the porous mesh cylinder is provided with a glass fiber layer for consuming sound energy. The utility model discloses the sound energy is consumed away in the friction on the sound wave accessible glass fiber layer that flows from a porous net section of thick bamboo to further improve noise elimination effect.

The pipe wall of the porous pipe is provided with a plurality of first silencing holes; the perforated pipe and the silencing hole group are arranged at the same height.

One end of the porous pipe is connected with the front connecting component through a connecting pipe, and the other end of the porous pipe is provided with a blocking cover I to form a blind end.

One end of the porous flat pipe is communicated with the first silencing cavity, and the other end of the porous flat pipe is provided with a second blocking cover to form a blind end.

The porous flat tubes are obliquely arranged from top to bottom. The design makes the noise elimination uniform, and the inclined design of the porous flat tube can further improve the noise elimination effect.

And the tube wall of the porous flat tube is provided with a plurality of second silencing holes.

The front connection assembly comprises a front cone and a front connection pipe; the front cone is connected with the outer cylinder body; one end of the front connecting pipe is used as an air inlet, and the other end of the front connecting pipe is connected with the perforated pipe through the connecting pipe.

The tail joint assembly comprises a tail cover and a tail pipe; the tail cover is connected with the outer cylinder body; one end of the tail pipe extends into the second silencing cavity, and the other end of the tail pipe is arranged outside the outer cylinder body as an exhaust end.

The utility model discloses the exhaust noise elimination principle of big discharge capacity motorcycle silencer is like: airflow and sound waves enter from the front connecting pipe and reach the inner cavity of the porous pipe, at the moment, the sound waves and the reflection of the inner wall of the porous pipe can counteract part of the sound waves, the rest sound waves are diffused through the first silencing holes of the porous pipe and flow into the first silencing cavity, then most of the sound waves enter the glass fiber layer through the silencing hole group on the porous net cylinder, and the sound waves entering the glass fiber layer consume sound energy through the friction of the glass fiber layer. In addition, partial sound waves enter the inner cavity of the porous flat tube and are reflected by the inner wall of the porous flat tube to offset the partial sound waves, so that partial sound energy is consumed. And the residual sound waves flow into the second silencing cavity through the second silencing holes of the porous flat tubes. Because the porous flat tubes are arranged side by side, air molecules of partial high-speed flowing air flow elastically collide with each other, so that the movement directions of the air flow molecules become disordered and are not bundled, and partial impact force is lost. The sound wave also consumes a portion of the sound energy by constantly reflecting interference. The remaining sound waves are partially discharged through the tail pipe.

The airflow and the sound wave discharged from the front connecting pipe directly pass through the porous pipe to the first blocking cover and mutually impact at the first blocking cover, the continuous pulse airflow forms relatively high air pressure at the blind end of the first blocking cover, and finally, the molecular motion after collision becomes disordered from the directivity through the complete elastic collision among molecules, between the molecules and the first blocking cover and between the molecules and the pipe wall, the flow direction is not provided any more, the molecules are not bundled any more, and no impact force is generated, so that the collision among the gas molecules cannot generate metal sound, namely, the regenerative noise and the noise pollution cannot be generated. Similarly, the principle that the airflow and the sound wave discharged by the porous pipe directly pass through the porous flat pipe to the second blocking cover and are silenced at the second blocking cover is the same as that described above.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect: the utility model discloses big discharge capacity motorcycle silencer structural design is reasonable, noise elimination effect is good and noise elimination performance is good, can realize reducing because the noise pollution that the motorcycle caused, is favorable to using and promoting in big discharge capacity motorcycle very much.

Drawings

FIG. 1 is a schematic view of the interior of a motorcycle muffler of the present invention;

FIG. 2 is a schematic view of the inside of a porous mesh cylinder in the motorcycle muffler of the present invention;

FIG. 3 is a schematic view of the muffler of the motorcycle of the present invention;

wherein, 1 is a front connecting pipe, 2 is a connecting sleeve, 3 is a front cone, 4 is a supporting clapboard, 5 is a connecting pipe, 6 is an outer cylinder, 7 is a porous net cylinder, 8 is a porous pipe, 9 is a first plugging cover, 10 is a porous flat pipe, 11 is a silencing clapboard, 12 is a second plugging cover, 13 is a first silencing cavity, 14 is a tail cover, 15 is a tail pipe, 16 is a second silencing cavity, and 17 is a silencing hole group.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Examples

As shown in fig. 1 to 3, the utility model discloses big discharge capacity motorcycle silencer is including the preceding subassembly that connects gradually, outer barrel 6 and the tail subassembly, and this silencer is still including setting up the noise elimination subassembly in outer barrel 6, and this noise elimination subassembly includes a porous net section of thick bamboo 7, is used for supporting the support baffle 4, porous pipe 8, noise elimination baffle 11 and two porous flat pipes 10 of a porous net section of thick bamboo 7. Wherein, the front connection component comprises a front cone 3 connected with the outer cylinder 6 and a front connection pipe 1 as an air inlet, and the tail connection component comprises a tail cover 14 connected with the outer cylinder 6 and a tail pipe 15 as an exhaust end.

The utility model discloses a 6 inner chambers of support baffle 4 and noise elimination baffle 11 with outer barrel separate for first anechoic chamber 13 and second anechoic chamber 16, porous pipe 8 is connected with preceding takeover 1 through connecting pipe 5 and connecting sleeve 2, porous pipe 8 alternates on support baffle 4 and is located first anechoic chamber 13 through connecting pipe 5, porous flat pipe 10 alternates on noise elimination baffle 11 and is located second anechoic chamber 16, porous flat pipe 10 communicates first anechoic chamber 13 and second anechoic chamber 16, and second anechoic chamber 16 is stretched into to the one end of tail pipe 15, the other end is established outside outer barrel 6 as the exhaust end, porous net section of thick bamboo 7 sets up 6 inner walls of outer barrel and is fixed through support baffle 4.

Specifically, the wall of the porous net cylinder 7 is provided with a plurality of groups of silencing holes 17; several groups of silencing holes 17 are arranged along the length direction of the porous mesh tube 7. In order to further improve the sound-damping effect, the outer wall of the porous mesh cylinder 7 is provided with a glass fiber layer for dissipating sound energy. The utility model discloses the sound energy is consumed to the friction on the sound wave accessible glass fiber layer that flows from porous net section of thick bamboo 7.

The utility model discloses a perforated pipe 8's pipe wall is provided with the first hole of eliminating noise of a plurality of, and its one end is connected with preceding takeover 1 through connecting pipe 5 and adapter sleeve 2, and the other end is provided with blanking cover 9 and forms the cecum. The perforated pipe 8 is arranged at the same height as the silencing hole group 17.

One end of the porous flat tube 10 is communicated with the first silencing cavity 13, and the other end is provided with a second blocking cover 12 to form a blind end. In order to make the noise elimination even, two porous flat tubes 2 are arranged from top to bottom in an inclined manner, and the tube walls of the porous flat tubes 2 are provided with a plurality of second noise elimination holes.

The utility model discloses the exhaust noise elimination principle of big discharge capacity motorcycle silencer is like: the airflow and the sound waves enter from the front connecting pipe 1 and reach the inner cavity of the perforated pipe 8, at the moment, the sound waves and the reflection of the inner wall of the perforated pipe 8 can counteract a part of the sound waves, the rest sound waves are diffused through the first silencing holes of the perforated pipe 8 and flow into the first silencing cavity 13, then most of the sound waves enter the glass fiber layer through the silencing hole group 17 on the perforated net cylinder 7, and the sound waves entering the glass fiber layer consume sound energy through the friction of the glass fiber layer. In addition, part of sound waves enter the inner cavity of the porous flat tube 10, and are reflected by the inner wall of the porous flat tube 10 to offset part of the sound waves, so that part of sound energy is consumed. The remaining sound waves flow into the second muffling chamber 17 through the second muffling holes of the porous flat tube 10. Because the porous flat tube 10 is arranged in parallel in an inclined manner, air molecules of partial high-speed flowing air flow elastically collide with each other, so that the movement directions of the air flow molecules become disordered and are not bundled, and partial impact force is lost. The sound wave also consumes a portion of the sound energy by constantly reflecting interference. The remaining sound waves are partly discharged through the tail pipe 15.

Wherein, the air current and the sound wave that follow takeover 1 exhaust directly pass through porous pipe 8 to in blanking cover 9 and at blanking cover 9 department looks towards each other, and continuous pulse air current forms relative high atmospheric pressure at the blind end of blanking cover 9, through the complete elastic collision between the molecule, between molecule and blanking cover 9 and between molecule and the pipe wall, finally make the molecular motion after the collision become disorderly from having the directionality, no longer have the flow direction, no longer restraint, become without the impact force, thereby make the collision between the gas molecule not produce the metallics, can not produce regenerated noise and noise pollution promptly. Similarly, the principle that the air flow and the sound wave discharged from the perforated pipe 8 directly pass through the perforated flat pipe 10 to the second blocking cover 12 and are silenced at the second blocking cover 12 is the same as that described above.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A large-displacement motorcycle muffler is characterized in that: the device comprises a front connection assembly, an outer cylinder and a tail connection assembly which are connected in sequence; the silencer also comprises a silencing component arranged in the outer cylinder body; the silencing assembly comprises a porous net barrel, a supporting clapboard for supporting the porous net barrel, a porous pipe, a silencing clapboard and at least two porous flat pipes;

2. The large displacement motorcycle muffler of claim 1, wherein: the wall of the porous net cylinder is provided with a plurality of groups of silencing holes; the plurality of groups of silencing holes are arranged along the length direction of the porous net barrel.

3. The large displacement motorcycle muffler of claim 2, wherein: the outer wall of the porous mesh cylinder is provided with a glass fiber layer for consuming sound energy.

4. The large displacement motorcycle muffler of claim 2, wherein: the pipe wall of the porous pipe is provided with a plurality of first silencing holes; the perforated pipe and the silencing hole group are arranged at the same height.

5. The large displacement motorcycle muffler of claim 4, wherein: one end of the porous pipe is connected with the front connecting component through a connecting pipe, and the other end of the porous pipe is provided with a blocking cover I to form a blind end.

6. The large displacement motorcycle muffler of claim 1, wherein: one end of the porous flat pipe is communicated with the first silencing cavity, and the other end of the porous flat pipe is provided with a second blocking cover to form a blind end.

7. The large displacement motorcycle muffler of claim 6, wherein: the porous flat tubes are obliquely arranged from top to bottom.

8. The large displacement motorcycle muffler of claim 6, wherein: and the tube wall of the porous flat tube is provided with a plurality of second silencing holes.

9. The large displacement motorcycle muffler of claim 1, wherein: the front connection assembly comprises a front cone and a front connection pipe; the front cone is connected with the outer cylinder body; one end of the front connecting pipe is used as an air inlet, and the other end of the front connecting pipe is connected with the perforated pipe through the connecting pipe.

10. The large displacement motorcycle muffler of claim 1, wherein: the tail joint assembly comprises a tail cover and a tail pipe; the tail cover is connected with the outer cylinder body; one end of the tail pipe extends into the second silencing cavity, and the other end of the tail pipe is arranged outside the outer cylinder body as an exhaust end.