CN203189081U - Rotary exhaust silencer for motorcycle - Google Patents

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

Rotary exhaust mufflers for motorcycles

technical field

The utility model belongs to the technical field of motorcycles, in particular to an exhaust muffler structure.

Background technique

The motorcycle exhaust muffler is used to reduce the temperature, pressure, speed and noise of the high-temperature, high-pressure, high-speed toxic exhaust gas and high-decibel noise discharged from the engine through the internal structure of the exhaust muffler, so that the gas finally discharged into the atmosphere It is one of the important components on the motorcycle, and its performance directly affects the comfort of driving and the power of the engine.

Existing exhaust mufflers usually consist of an exhaust pipe and a muffler. There are multiple baffles welded inside the muffler to divide the muffler into multiple cavities. Through the expansion and compression of the airflow, the powerful pulsating noise can be attenuated. , this structural setting can effectively attenuate the noise, but because the flow path of the airflow in the muffler is relatively short, its noise reduction effect still needs to be improved. For this reason, some exhaust mufflers use a tailpipe whose diameter is smaller The way to improve the noise reduction effect, but it will lead to the negative impact of engine power reduction.

Utility model content

The utility model aims to provide an exhaust muffler with simple structure and better noise reduction effect, which can greatly increase the circulation path of the airflow in the muffler tube, improve driving comfort and engine power.

For this reason, the technical solution adopted by the utility model is: a rotary exhaust muffler for motorcycles, including an exhaust pipe (1), and a muffler (2) located on the left side of the exhaust pipe (1). The muffler (2) includes an outer cylinder (21), a tailpipe (22), a three-way catalytic converter (23) and partitions (24) arranged at intervals in the outer cylinder (21), and the exhaust pipe (1) and The three-way catalytic converters (23) are connected, and the key point is that there are two partitions (24), which divide the outer cylinder (21) into first, second and third chambers (A , B, C), the first, second, and third insertion tubes (25, 26, 27) perpendicular to the partition (24) are also arranged in the outer cylinder (21), and the first insertion tube The intake end of (25) is located in the third chamber (C), the exhaust end is located in the first chamber (A), the intake end of the second cannula (26) is located in the first chamber (A), The exhaust end is located in the third chamber (C), the intake end of the third cannula (27) is located in the third chamber (C), the exhaust end is located in the second chamber (B), and the tail pipe The intake end of (22) is located in the second chamber (B), and the exhaust end protrudes from the tail end of the outer cylinder (21). The three-way catalytic converter (23) connects with the first intubation tube ( 25), the diameters of the first cannula (25), the second cannula (26), the third cannula (27) and the tail pipe (22) gradually decrease.

The working principle and process are as follows: the high-temperature and high-speed gas discharged from the exhaust port of the engine first enters the exhaust pipe, and after being converted by the three-way catalytic converter, it is turned by the elbow and introduced into the first intubation tube, and then enters the first chamber, where the high-temperature compressed gas After the first expansion in the first chamber, it is compressed by the second cannula and then rotated into the third chamber for the second expansion, then compressed by the third cannula and then rotated into the second chamber for the third time It expands and is finally compressed into the atmosphere through the tailpipe. Every time the gas expands, the flow rate decreases, the powerful pulsation noise is attenuated, and then it is compressed again. With so many sudden changes, the sound energy is greatly weakened, thereby reducing the exhaust noise.

There are two three-way catalytic converters (23) connected in series, and an air supply pipe (29) is arranged between the two three-way catalytic converters (23), and one end of the air supply pipe (29) extends to the outer cylinder ( 21) Outside. Two three-way catalytic converters are installed to further increase the conversion rate of toxic gases; an air supply pipe is added to supply fresh air through the air supply pipe to ensure the working efficiency of the second three-way catalytic converter and make gas emissions more environmentally friendly.

Beneficial effect:

(1) The airflow route with multiple rotations increases the contact time and contact area between the airflow and the pipe wall. Due to the contact friction between the airflow and the pipe wall, the conversion rate of sound energy into heat energy is increased, which is beneficial to reduce noise;

(2) Repeated expansion and compression of the gas reduces the pulsation noise, increases the circulation time of the gas in the muffler, reduces the flow velocity of the gas, and reduces the noise value caused by it;

(3) Since the noise reduction effect of the muffler itself is very good, the diameter of the tailpipe can be set to be greater than or equal to the diameter of the engine exhaust port, without affecting the power of the engine;

In summary, the utility model has the characteristics of simple structure and remarkable noise reduction effect, ensures the power of the engine, and improves the driving comfort.

Description of drawings

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

FIG. 2 is a partially cutaway view of FIG. 1 .

Fig. 3 is a schematic diagram of gas flow in the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1 and Figure 2, the rotary exhaust muffler for motorcycles consists of two parts, the exhaust pipe 1 and the muffler 2, the exhaust pipe 1 is located on the right side, and the muffler 2 is located on the left side of the exhaust pipe 1 .

The muffler 2 is composed of an outer cylinder 21, a tailpipe 22, a three-way catalytic converter 23, a partition 24, a first insertion pipe 25, a second insertion pipe 26, a third insertion pipe 27, and an elbow 28. The three-way catalytic converter 23, the dividing plate 24, the first insertion pipe 25, the second insertion pipe 26, the third insertion pipe 27, and the elbow 28 are all arranged in the outer cylinder 21, and one end of the tail pipe 22 is located in the outer cylinder 21, and the other One end protrudes from the tail end of the outer cylinder 21 . The exhaust pipe 1 is connected with a three-way catalytic converter 23 . There are two partitions 24, which are arranged at intervals in the outer cylinder 21, and divide the outer cylinder 21 into first, second and third chambers A, B, and C arranged in sequence from right to left. The first, second and third insertion tubes 25, 26, 27 perpendicular to the partition 24 are also arranged in the outer cylinder 21, and the first, second and third insertion tubes 25, 26, 27 are inserted on the partition 24 . The first cannula 25 is inserted through the two partitions 24 , the intake end of the first cannula 25 is located in the third chamber C, and the exhaust end is located in the first chamber A. The second cannula 26 is also inserted through the two partitions 24 , the intake end of the second cannula 26 is located in the first chamber A, and the exhaust end is located in the third chamber C. The third cannula 27 is inserted on the partition plate 24 on the left side, the intake end of the third cannula 27 is located in the third chamber C, and the exhaust end is located in the second chamber B. The right end of the tail pipe 22 is also inserted on the partition 24 on the left side, the inlet end of the tail pipe 22 is located in the second chamber B, and the exhaust end extends out of the outer tube 21 . The three-way catalytic converter 23 is connected to the first intubation pipe 25 by an elbow 28, and the diameters of the first intubation pipe 25, the second intubation pipe 26, the third intubation pipe 27, and the tailpipe 22 gradually decrease, that is, the first intubation pipe 25 The diameter of the second cannula 26 is greater than the diameter of the second cannula 26, the diameter of the second cannula 26 is greater than the diameter of the third cannula 27, and the diameter of the third cannula 27 is greater than the diameter of the tail pipe 22.

Three-way catalytic converter 23 can be one or two. When there are two three-way catalytic converters 23, they are connected in series, and an air supply pipe 29 is arranged between the two three-way catalytic converters 23, and one end of the air supply pipe 29 extends outside the outer cylinder 21.

As shown in Figure 3, the flow route of gas in the rotary exhaust muffler is: exhaust pipe 1 → two three-way catalytic converters 23 → elbow 28 → first intubation pipe 25 → second intubation pipe 26 → third Intubation pipe 27→tail pipe 22, the fresh air required by the second three-way catalytic converter 23 is replenished from the air supply pipe 29.

Claims (2)

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).

Images