CN103147824A

CN103147824A - Rotary exhaust silencer of motorcycle

Info

Publication number: CN103147824A
Application number: CN2013100713983A
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: 2013-06-12

Abstract

The invention discloses a rotary exhaust silencer of a motorcycle. The rotary exhaust silencer comprises an exhaust pipe (1) and a silencer (2), wherein two partition plates (24) are arranged in an outer barrel (21) of the silencer (2) and used for dividing the outer barrel (21) into first to third cavities (A, B and C) arranged in sequence from right to left; first to third insertion pipes (25, 26 and 27) vertical to the partition plates (24) are also arranged in the outer barrel (21); and the diameters of the first insertion pipe (25), the second insertion pipe (26), the third insertion pipe (27) and a tail pipe (22) are gradually reduced to form a multi-time rotation type airflow channel. The rotary exhaust silencer has the characteristics of simple structure and remarkable noise reduction effect, guarantees the power of an engine, and improves the driving and riding comfortableness.

Description

Motorcycle rotary type exhaust silencer

Technical field

The invention belongs to technical field of motorcycles, be 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, the requirement that makes the gas that finally is discharged in atmosphere and noise figure meet NBS, be one of important spare part on motorcycle, the quality of its performance directly has influence on the travelling comfort of driving and the power of motor.

Existing exhaust silencer is comprised of outlet pipe and silencing apparatus usually, be welded with the polylith dividing plate in 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 the flow route due to 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.

Summary of the invention

The present invention 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, improve the travelling comfort of driving and the power of motor greatly.

for this reason, the technical solution adopted in the present invention is: a kind of motorcycle rotary type exhaust silencer comprises 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 urceolus (21), described outlet pipe (1) is connected with ternary catalyzing unit (23), key is: totally two, described dividing plate (24), with urceolus (21) be divided into from right to left arrange successively first, second, the 3rd chamber (A, B, C), also be provided with in described urceolus (21) perpendicular to first of dividing plate (24), second, the 3rd intubate (25, 26, 27), the inlet end of described the first intubate (25) is positioned at the 3rd chamber (C), exhaust end is positioned at the first chamber (A), and the inlet end of described the second intubate (26) is positioned at the first chamber (A), exhaust end is positioned at the 3rd chamber (C), and the inlet end of described the 3rd intubate (27) is positioned at the 3rd chamber (C), exhaust end is positioned at the second chamber (B), and the inlet end of described tail pipe (22) is positioned at the second chamber (B), exhaust end stretches out the tail end of urceolus (21), and described ternary catalyzing unit (23) is connected with the first intubate (25) by bend pipe (28), described the first intubate (25), the second intubate (26), the 3rd intubate (27), the diameter of tail pipe (22) reduces gradually.

Working principle and process are as follows: at first the high temperature and high speed gas of discharging from engine exhaust port enter outlet pipe, after transforming through ternary catalyzing unit again, import the first intubate by the bend pipe revolution, enter the first chamber, after high temperature compressed gas expands in the first chamber for the first time, revolution importing the 3rd chamber expands for the second time after the second intubate is compressed again, then revolution importing the second chamber expands for the third time after the 3rd intubate compression, imports in atmosphere finally by the tail pipe compression is rear.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 greatly weak, 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 urceolus (21).Two ternary catalyzing units are set, further improve the conversion ratio of toxic gas; Set up blowdown pipe, fill into fresh air by blowdown pipe, to guarantee the working efficiency of second section ternary catalyzing unit, make gas discharging environmental protection more.

Beneficial effect:

(1) rotating airflow route repeatedly increased time of contact and the area of contact of air-flow and tube wall, due to air-flow and tube wall contact friction, 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 the flowing velocity of gas, the also corresponding reduction of its noise figure that causes;

(3) noise reduction due to 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 affect the power of motor;

In sum, simple in structure, the significant feature of noise reduction that the present invention has, and guaranteed the power of motor, improved the travelling comfort of driving.

Description of drawings

Fig. 1 is structural representation of the present invention.

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

Fig. 3 is the gas flow schematic diagram in the present invention.

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

Motorcycle rotary type exhaust silencer as shown in Figure 1 and Figure 2 is comprised 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 comprised of urceolus 21, tail pipe 22, ternary catalyzing unit 23, dividing plate 24, the first intubate 25, the second intubate 26, the 3rd intubate 27, bend pipe 28 etc.Ternary catalyzing unit 23, dividing plate 24, the first intubate 25, the second intubate 26, the 3rd intubate 27, bend pipe 28 all are arranged in 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 is connected with ternary catalyzing unit 23.Totally two, dividing plate 24 is disposed in 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.The first intubate 25 is interted on two dividing plates 24, and the inlet end of the first intubate 25 is positioned at the 3rd cavity C, exhaust end is positioned at the first chamber A.The second intubate 26 is also to intert on two dividing plates 24, and the inlet end of the 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 is also 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 urceolus 21.Ternary catalyzing unit 23 is connected with the first intubate 25 by bend pipe 28, the diameter of the first intubate 25, the second intubate 26, the 3rd intubate 27, tail pipe 22 reduces gradually, namely the diameter of the first intubate 25 is greater than the diameter of the second intubate 26, the diameter of the 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, be provided with blowdown pipe 29 between two ternary catalyzing units 23, blowdown pipe 29 1 ends reach outside urceolus 21.As shown in Figure 3, the circulation route of gas in the rotary type exhaust silencer is: 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 pipes 22, the fresh air that second section ternary catalyzing unit 23 needs fills into from blowdown pipe 29.

Claims

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

2. according to motorcycle rotary type exhaust silencer claimed in 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 urceolus (21).