CN208380662U - Three-stage gradually expands motorcycle silencing exhaust pipe - Google Patents

Abstract

The utility model belongs to exhaust pipe technical field more particularly to a kind of three-stage gradually expands motorcycle silencing exhaust pipe.The utility model, including the internal expanding chamber with cavity, the cavity both ends are connected to admission line and exhaust pipe respectively, the first expansion tube, the second expansion tube and third expansion tube that internal diameter is sequentially increased and is interconnected are additionally provided in the expanding chamber, one end of first expansion tube is connected to admission line, and one end of the third expansion tube is connected to cavity.The utility model expands high pressure gas gradually using three-stage expansion tube, excellent noise reduction effect, while will not influence gas circulation, and the utility model is equipped with one layer of noise reduction layer also on the inner wall of expanding chamber, further improves the noise reduction effect of exhaust pipe.

Description

Three-stage gradually expands motorcycle silencing exhaust pipe

Technical field

The utility model belongs to exhaust pipe technical field more particularly to a kind of three-stage gradually expands motorcycle noise reduction exhaust Pipe.

Background technique

With the development of economy and society, urban transportation industry is also increasingly flourishing, to people's work and life bring it is convenient and Comfortably, but with the increase of town and country vehicle, the daily life of the noise on human of motor vehicles causes puzzlement, existing motor Vehicle exhaust pipe generally makes the gas of high temperature and pressure be able to expansion decompression in noise reduction process using expanding chamber, to reach noise reduction Purpose, but since the caliber of expanding chamber is excessive, pulse of each exhaust can not fill up entire caliber, and at this moment exhaust gas is in caliber It is interior to will form sinuous flow, the exhaust pipe of internal gas flow communication is not influenced while causing exhaust to have some setbacks, therefore need a kind of noise reduction.

For example, Chinese utility model patent disclose a kind of noise reduction emission reduction motorcycle exhaust pipe [application number: 201620672060.2], which includes admission line, process chamber, exhaust pipe, is equipped on the left of the inner treatment chamber Flat cover, the flat cover are the cylindrical shape of traverse, and admission line, closing on the right side of flat cover, drop are connected on the left of flat cover The side of sound cover is equipped with venthole, and the centre of inner treatment chamber is equipped with two layers of particle baffle, and two layers of particle baffle is equipped with The different gas vent in position, the side of process chamber are equipped with interlayer, and scaldproof layer is equipped in the interlayer, and the exhaust pipe setting exists On the right side of process chamber, air filtration cotton is equipped in the exhaust pipe.

The utility model is only provided with flat cover in air inlet to play the role of noise reduction, and such noise reduction effect is poor, Obstruction is caused to the circulation of internal gas simultaneously.

Utility model content

The purpose of this utility model is in view of the above-mentioned problems, providing a kind of three-stage gradually expands motorcycle noise reduction exhaust Pipe.

In order to achieve the above objectives, the utility model uses following technical proposal:

A kind of three-stage gradually expands motorcycle silencing exhaust pipe, including the internal expanding chamber with cavity, the cavity Both ends are connected to admission line and exhaust pipe respectively, and internal diameter is sequentially increased and is interconnected is additionally provided in the expanding chamber One end of one expansion tube, the second expansion tube and third expansion tube, first expansion tube is connected to admission line, and the third is swollen One end of tube expansion is connected to cavity.

Gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, in two adjacent expansion tubes, internal diameter compared with Big expansion pipe diameter is 1.5-2 times of the lesser expansion pipe diameter of internal diameter.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, in three expansion tubes, length is longest swollen Tube expansion length is the 2 times or more of the shortest expansion length of tube of length.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, the circulation side of adjacent two expansion tube interior air-flows To on the contrary, and adjacent two expansion tubes pass through bend pipe be connected to.

It gradually expands in motorcycle silencing exhaust pipe in above-mentioned three-stage, is fixedly installed on the inner wall of the expanding chamber One layer of noise reduction layer.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, the noise reduction layer includes imperforate plate, microwell plate And the acoustical panel between imperforate plate and microwell plate, the inner wall of the microwell plate and expanding chamber fit, tool inside acoustical panel There are several bloops, quieter material is filled in bloop.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, the quieter material is glass fibre or noise reduction Cotton.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, further includes arc-shaped outside expanding chamber Protective baffle plate, connecting rod one end are fixedly connected with expanding chamber, and the other end is fixedly connected with protective baffle plate.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, between the third expansion tube and exhaust pipe It is additionally provided with filter screen.

It is gradually expanded in motorcycle silencing exhaust pipe in above-mentioned three-stage, the axial line and expanding chamber of the exhaust pipe Axial line angle α be 150-170 degree.

Compared with prior art, utility model has the advantages that

1, the utility model expands high pressure gas gradually using three-stage expansion tube, excellent noise reduction effect, while will not Influence gas circulation.

2, the utility model is equipped with one layer of noise reduction layer also on the inner wall of expanding chamber, further improves the noise reduction of exhaust pipe Effect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the cross-sectional view of the utility model；

Fig. 3 is the left view of the utility model；

Fig. 4 is the structural schematic diagram of noise reduction layer；

In figure: expanding chamber 1, admission line 2, exhaust pipe 3, the first expansion tube 4, the second expansion tube 5, third expansion tube 6, Cavity 7, bend pipe 8, noise reduction layer 9, protective baffle plate 10, connecting rod 11, filter screen 12, imperforate plate 91, microwell plate 92, acoustical panel 93, Bloop 94.

Specific embodiment

The utility model is described in more detail with reference to the accompanying drawings and detailed description.

Referring to figs. 1 and 2, a kind of three-stage gradually expands motorcycle silencing exhaust pipe, including internal with cavity 7 Expanding chamber 1,7 both ends of cavity are connected to admission line 2 and exhaust pipe 3 respectively, are additionally provided with internal diameter in the expanding chamber 1 The first expansion tube 4, the second expansion tube 5 and the third expansion tube 6 for being sequentially increased and being interconnected, the one of first expansion tube 4 End is connected to admission line 2, and one end of the third expansion tube 6 is connected to cavity 7.

The utility model carries out in use, the exhaust gas generated in engine is entered in the first expansion tube 4 by admission line 2 Preliminary expansion decompression, then successively carry out expansion decompression gradually by the second expansion tube 5 and third expansion tube 6, finally via Cavity 7 and exhaust pipe 3 are discharged, the mode for allowing high pressure gas gradually to expand in this way, excellent noise reduction effect, while will not influence gas stream It is logical.

Preferably, in two adjacent expansion tubes, the biggish expansion pipe diameter of internal diameter is that the lesser expansion tube of internal diameter is straight 1.5-2 times of diameter can preferably take into account two aspects of noise reduction and exhaust under such caliber change degree.

Preferably, in three expansion tubes, the longest expansion length of tube of length is 2 times of the shortest expansion length of tube of length More than, there are high frequency audio and bass two parts in general noise, if only using the expansion tube of equal length, can only eliminate single Audio, although decibel reduces, still there are also the unacceptable tone colors of human ear, so setting not identical for the length of expansion tube Length, can more thoroughly eliminate noise.

Preferably, adjacent two expansion tube interior air-flows circulating direction on the contrary, and adjacent two expansion tubes connected by bend pipe 8 Logical, such frame mode can save the total length of exhaust pipe, prevent the length of exhaust pipe too long and inconvenient to use.

Preferably, the angle α of the axial line of the axial line and expanding chamber 1 of the exhaust pipe 3 is 150-170 degree, in this way Angle under, gas can be preferably discharged by exhaust pipe 3.

In conjunction with shown in Fig. 2 and Fig. 4, one layer of noise reduction layer 9 is fixedly installed on the inner wall of the expanding chamber 1, noise reduction layer 9 is set Set the noise reduction effect that can further improve exhaust pipe entirety.

Specifically, the noise reduction layer 9 is including imperforate plate 91, microwell plate 92 and between imperforate plate 91 and microwell plate 92 Acoustical panel 93, the inner wall of the microwell plate 92 and expanding chamber 1 fits, and has several bloops 94 inside acoustical panel 93, disappears Sound material is filled in bloop 94, and wherein quieter material can be glass fibre or silencing cotton.

As shown in figure 3, further including the arc-shaped protective baffle plate 10 outside expanding chamber 1,11 one end of connecting rod and expansion Room 1 is fixedly connected, and the other end is fixedly connected with protective baffle plate 10, since what is be discharged out of engine is the useless of high temperature and pressure Gas, this will lead to, and 1 temperature of expanding chamber is higher, therefore protective baffle plate 10 is arranged far from the side of motorcycle body in expanding chamber 1, to keep away Exempt from the accident that user leg is burned to occur.

As shown in Fig. 2, being additionally provided with filter screen 12 between the third expansion tube 6 and exhaust pipe 3, filter screen 12 is adsorbable Some small solid particles, prevent these solid particles from polluting the environment.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Although expanding chamber 1, admission line 2, exhaust pipe 3, the expansion of the first expansion tube 4, second is used more herein It is pipe 5, third expansion tube 6, cavity 7, bend pipe 8, noise reduction layer 9, protective baffle plate 10, connecting rod 11, filter screen 12, imperforate plate 91, micro- The terms such as orifice plate 92, acoustical panel 93, bloop 94, but it does not exclude the possibility of using other terms.Only using these terms Merely to being more convenient to describe and explain the essence of the utility model；Being construed as any additional limitation is all It is contrary to the spirit of the present invention.

Claims (10)

1. a kind of three-stage gradually expands motorcycle silencing exhaust pipe, described including the internal expanding chamber (1) with cavity (7) Cavity (7) both ends are connected to admission line (2) and exhaust pipe (3) respectively, it is characterised in that: are also set in the expanding chamber (1) The first expansion tube (4), the second expansion tube (5) and the third expansion tube (6) for thering is internal diameter to be sequentially increased and being interconnected, described first One end of expansion tube (4) is connected to admission line (2), and one end of the third expansion tube (6) is connected to cavity (7).

2. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: at adjacent two In expansion tube, the biggish expansion pipe diameter of internal diameter is 1.5-2 times of the lesser expansion pipe diameter of internal diameter.

3. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: in three expansion tubes In, the longest expansion length of tube of length is the 2 times or more of the shortest expansion length of tube of length.

4. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: adjacent two expansions The circulating direction of pipe interior air-flow on the contrary, and adjacent two expansion tubes pass through bend pipe (8) and be connected to.

5. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: the expanding chamber (1) one layer of noise reduction layer (9) is fixedly installed on inner wall.

6. three-stage as claimed in claim 5 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: the noise reduction layer It (9) include imperforate plate (91), microwell plate (92) and the acoustical panel (93) between imperforate plate (91) and microwell plate (92), it is described Microwell plate (92) and the inner wall of expanding chamber (1) fit, and have several bloops (94) inside acoustical panel (93), quieter material is filled out It fills in bloop (94).

7. three-stage as claimed in claim 6 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: the quieter material For glass fibre or silencing cotton.

8. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: further include positioned at swollen The arc-shaped protective baffle plate (10) of swollen room (1) outside, connecting rod (11) one end are fixedly connected with expanding chamber (1), the other end and anti- Guard (10) is fixedly connected.

9. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: the third expansion Filter screen (12) are additionally provided between pipe (6) and exhaust pipe (3).

10. three-stage as described in claim 1 gradually expands motorcycle silencing exhaust pipe, it is characterised in that: the exhaust pipe The angle α of the axial line of the axial line and expanding chamber (1) in road (3) is 150-170 degree.