CN203189081U

CN203189081U - Rotary exhaust silencer for motorcycle

Info

Publication number: CN203189081U
Application number: CN2013201020997U
Authority: CN
Inventors: 庞奎; 羊本伟
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2013-03-06
Filing date: 2013-03-06
Publication date: 2013-09-11
Anticipated expiration: 2023-03-06

Abstract

The utility model discloses a rotary exhaust silencer for a motorcycle. The rotary exhaust silencer comprises an exhaust tube (1) and a silencer body (2), wherein two separating plates (24) are arranged in an outer cylinder (21) of the silencer body (2) so as to separate the outer cylinder (21) into a first cavity A, a second cavity B and a third cavity C from right to left, a first inserting tube (25), a second inserting tube (26) and a third inserting tube (27) which are perpendicular to the separating plates (24) are further arranged in the outer cylinder (21), and the diameter of the first inserting tube (25), the diameter of the second inserting tube (26), the diameter of the third inserting tube (27) and the diameter of a tail tube (22) are gradually reduced to form a repeatedly-rotary airflow channel. The rotary exhaust silencer has the advantages of being simple in structure and obvious in noise reduction effect. The rotary exhaust silencer guarantees power of an engine and improves riding comfort.

Description

The rotary type exhaust silencer that is used for motorcycle

Technical field

The utility model belongs to technical field of motorcycles, is specifically related to a kind of exhaust silencer structure.

Background technique

Exhaust muffler for motorcycle be used for high temperature, high pressure, poisonous fume at a high speed and high-decibel noise that motor is discharged by the internal structure of exhaust silencer lower the temperature, step-down, reduction of speed and reduce noise, make the gas and the noise figure that finally are discharged in the atmosphere meet request of national standard, be one of important spare part on the motorcycle, the quality of its performance directly has influence on the travelling comfort of driving and the power of motor.

Existing exhaust silencer is made up of outlet pipe and silencing apparatus usually, be welded with the polylith dividing plate in the silencing apparatus, silencing pot is divided into a plurality of cavitys, expansion and compression by air-flow, thereby powerful microseismic noise is decayed, this structure setting, attenuate acoustic noise effectively, but because the flow route of air-flow in silencing pot is shorter, its noise reduction still remains to be improved, for this reason, there is the part exhaust silencer to adopt the tail pipe diameter to improve noise reduction less than the mode of engine exhaust port diameter, but the negative effect that can cause engine power to reduce.

The model utility content

The utility model aims to provide a kind of simple in structure, better exhaust silencer of noise reduction, and the flow route of leap ahead air-flow in silencing pot improves the travelling comfort of driving and the power of motor greatly.

For this reason, the technological scheme that the utility model adopts is: a kind of rotary type exhaust silencer for motorcycle, comprise outlet pipe (1), be positioned at the silencing apparatus (2) in outlet pipe (1) left side, described silencing apparatus (2) comprises urceolus (21), tail pipe (22), ternary catalyzing unit (23) and be disposed on dividing plate (24) in the urceolus (21), described outlet pipe (1) links to each other with ternary catalyzing unit (23), key is: totally two on described dividing plate (24), with urceolus (21) be divided into from right to left arrange successively first, second, the 3rd chamber (A, B, C), in described urceolus (21), also be provided with perpendicular to first of dividing plate (24), second, the 3rd intubate (25,26,27), the inlet end of described first intubate (25) is positioned at the 3rd chamber (C), exhaust end is positioned at first chamber (A), the inlet end of described second intubate (26) is positioned at first chamber (A), exhaust end is positioned at the 3rd chamber (C), the inlet end of described the 3rd intubate (27) is positioned at the 3rd chamber (C), exhaust end is positioned at second chamber (B), the inlet end of described tail pipe (22) is positioned at second chamber (B), exhaust end stretches out the tail end of urceolus (21), described ternary catalyzing unit (23) links to each other described first intubate (25) by bend pipe (28) with first intubate (25), second intubate (26), the 3rd intubate (27), the diameter of tail pipe (22) reduces gradually.

Working principle and process are as follows: the high temperature and high speed gas of discharging from engine exhaust port at first enters outlet pipe, after transforming through ternary catalyzing unit again, import first intubate by the bend pipe revolution, enter first chamber, after high temperature compressed gas carries out expanding the first time in first chamber, turn round importing the 3rd chamber again and carry out expanding the second time after the compression of second intubate, revolution importing second chamber expands for the third time after the compression of the 3rd intubate again, compresses the back finally by tail pipe and imports in the atmosphere.Gas is every, and flow velocity reduces through once expanding, and powerful microseismic noise is decayed, and is compressed again afterwards, so repeatedly sudden change, and acoustic energy is weak greatly, thereby plays the effect that reduces exhaust noise.

Totally two of described ternary catalyzing units (23) are cascaded, and are provided with blowdown pipe (29) between two ternary catalyzing units (23), and described blowdown pipe (29) one ends reach outside the urceolus (21).Two ternary catalyzing units are set, further improve the conversion ratio of toxic gas; Set up blowdown pipe, mend into fresh air by blowdown pipe, to guarantee the working efficiency of the second joint ternary catalyzing unit, make gas discharge environmental protection more.

Beneficial effect:

(1) rotating airflow route has repeatedly increased time of contact and the area of contact of air-flow and tube wall, because air-flow and tube wall contact friction, has increased the conversion ratio that acoustic energy is converted into heat energy, is conducive to reduce noise;

(2) repetitious expansion and pressurized gas, the microseismic noise that decayed has increased the currency of gas in silencing apparatus, has reduced gas flow speed, the also corresponding reduction of its noise figure that causes;

(3) because the noise reduction of silencing apparatus itself is very good, the diameter of tail pipe can be arranged to the diameter more than or equal to engine exhaust port, can not influence the power of motor;

In sum, the utlity model has simple in structure, noise reduction notable attribute, and guaranteed the power of motor, improved the travelling comfort of driving.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the partial cutaway view of Fig. 1.

Fig. 3 is the gas flow schematic representation in the utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

The rotary type exhaust silencer that is used for motorcycle as shown in Figure 1 and Figure 2 is made up of outlet pipe 1 and silencing apparatus 2 two-part, and outlet pipe 1 is positioned at the right side, and silencing apparatus 2 is positioned at the left side of outlet pipe 1.

Silencing apparatus 2 is made up of urceolus 21, tail pipe 22, ternary catalyzing unit 23, dividing plate 24, first intubate 25, second intubate 26, the 3rd intubate 27, bend pipe 28 etc.Ternary catalyzing unit 23, dividing plate 24, first intubate 25, second intubate 26, the 3rd intubate 27, bend pipe 28 all are arranged in the urceolus 21, and an end of tail pipe 22 is positioned at the tail end that urceolus 21, the other end stretch out urceolus 21.Outlet pipe 1 links to each other with ternary catalyzing unit 23.Totally two on dividing plate 24 is disposed in the urceolus 21, urceolus 21 is divided into first, second, third chamber A, B, the C that arranges successively from right to left.First, second, third intubate 25,26,27, first, second, third intubate 25,26,27 that also are provided with in urceolus 21 perpendicular to dividing plate 24 are interted on dividing plate 24.First intubate 25 is interted on two dividing plates 24, and the inlet end of first intubate 25 is positioned at the 3rd cavity C, exhaust end is positioned at the first chamber A.Second intubate 26 also is to intert on two dividing plates 24, and the inlet end of second intubate 26 is positioned at the first chamber A, exhaust end is positioned at the 3rd cavity C.The 3rd intubate 27 is interted on the dividing plate 24 that is positioned at the left side, and the inlet end of the 3rd intubate 27 is positioned at the 3rd cavity C, exhaust end is positioned at the second chamber B.The right-hand member of tail pipe 22 also is to intert on the dividing plate 24 that is positioned at the left side, and the inlet end of tail pipe 22 is positioned at the second chamber B, exhaust end reaches outside the urceolus 21.Ternary catalyzing unit 23 links to each other with first intubate 25 by bend pipe 28, the diameter of first intubate 25, second intubate 26, the 3rd intubate 27, tail pipe 22 reduces gradually, namely the diameter of first intubate 25 is greater than the diameter of second intubate 26, the diameter of second intubate 26 is greater than the diameter of the 3rd intubate 27, and the diameter of the 3rd intubate 27 is greater than the diameter of tail pipe 22.

Ternary catalyzing unit 23 can be one or two.When ternary catalyzing unit 23 is two, be cascaded, between two ternary catalyzing units 23, be provided with blowdown pipe 29, blowdown pipe 29 1 ends reach outside the urceolus 21.

As shown in Figure 3, the circulation route of gas in the rotary type exhaust silencer is: the fresh air that 1 → two ternary catalyzing unit 23 → bend pipe of outlet pipe, 28 → the first intubate, 25 → the second intubate 26 → the 3rd intubate 27 → tail pipe 22, the second joint ternary catalyzing units 23 need is mended from blowdown pipe 29.

Claims

1. rotary type exhaust silencer that is used for motorcycle, comprise outlet pipe (1), be positioned at the silencing apparatus (2) in outlet pipe (1) left side, described silencing apparatus (2) comprises urceolus (21), tail pipe (22), ternary catalyzing unit (23) and be disposed on dividing plate (24) in the urceolus (21), described outlet pipe (1) links to each other with ternary catalyzing unit (23), it is characterized in that: totally two on described dividing plate (24), with urceolus (21) be divided into from right to left arrange successively first, second, the 3rd chamber (A, B, C), in described urceolus (21), also be provided with perpendicular to first of dividing plate (24), second, the 3rd intubate (25,26,27), the inlet end of described first intubate (25) is positioned at the 3rd chamber (C), exhaust end is positioned at first chamber (A), the inlet end of described second intubate (26) is positioned at first chamber (A), exhaust end is positioned at the 3rd chamber (C), the inlet end of described the 3rd intubate (27) is positioned at the 3rd chamber (C), exhaust end is positioned at second chamber (B), the inlet end of described tail pipe (22) is positioned at second chamber (B), exhaust end stretches out the tail end of urceolus (21), described ternary catalyzing unit (23) links to each other described first intubate (25) by bend pipe (28) with first intubate (25), second intubate (26), the 3rd intubate (27), the diameter of tail pipe (22) reduces gradually.

2. according to the described rotary type exhaust silencer for motorcycle of claim 1, it is characterized in that: totally two of described ternary catalyzing units (23), be cascaded, be provided with blowdown pipe (29) between two ternary catalyzing units (23), described blowdown pipe (29) one ends reach outside the urceolus (21).