CN204371456U - Multi-cavity type automobile tail gas noise elimination device - Google Patents

Abstract

The utility model relates to a multi-chamber automobile exhaust muffler, which relates to the technical field of automobile exhaust muffler. The utility model aims to overcome the problem that the volume and quality of the existing single muffler are limited by the car body, and the effect cannot reach the expected goal. Its intake pipe passes through the front cover, front partition and rear partition from left to right and then exposes a section on the right side of the rear partition. The port of the intake pipe exposed on the left side of the front cover is the exhaust gas inlet; the middle core pipe It is installed inside the circular tube shell, the middle core pipe passes through the front partition and the rear partition from left to right and then exposes a section on the right side of the rear partition, and the middle core pipe exposes a section on the left side of the front partition. The core pipe passes through the rear end cover, the rear partition and the front partition from right to left and exposes a section on the left side of the front partition, and the port where the exhaust core pipe exposes a section on the right side of the rear end cover is the exhaust gas outlet. The utility model has a compact structure and a reasonable design, and can effectively reduce the exhaust noise in the whole speed range of the engine.

Description

Multi-chamber automobile exhaust muffler

technical field

The utility model relates to the technical field of automobile tail gas muffler.

Background technique

With the continuous expansion of the city scale, the number of urban vehicles has also increased. Along with the development of traffic, vehicle noise pollution has also been widely recognized by people. Aiming at the engine, which is the main source of automobile noise, a well-structured exhaust muffler is the most effective way to reduce the noise outside the vehicle. At present, the existing muffler structure generally includes an intake pipe, a shell, an exhaust pipe, and the like. There are many types of mufflers, but their muffler mechanism can be divided into main types, namely single-chamber muffler, double-chamber muffler, three-way perforated muffler, resistance muffler, micro-perforated plate muffler, small hole muffler. The most widely used multi-cavity muffler is to achieve the sound absorption effect by letting the exhaust gas go through the multi-chamber and the absorption of the sound-absorbing material step by step, and finally discharge it into the atmosphere. And the volume and quality of a single muffler are limited by the automobile body, and the effect can not reach the expected goal.

Contents of the invention

The purpose of the utility model is to provide a multi-chamber automobile exhaust muffler. The utility model is to overcome the problem that the volume and quality of the existing single muffler are limited by the car body, and the effect cannot reach the expected goal. A multi-cavity automobile exhaust muffler of the present utility model comprises a circular tubular shell 1, a front end cover 2, a front partition 3, a rear partition 4, a rear end cover 5, an intake pipe 6, an intermediate core pipe 7, Exhaust core pipe 8;

The front end cover 2 is sealed and buckled on the left port of the circular tubular housing 1, and the rear end cover 5 is sealed and buckled on the right port of the circular tubular housing 1; Inside the shell 1, the inside of the circular tubular shell 1 is divided into the first chamber 1-1, the second chamber 1-2 and the third chamber 1-3 from left to right, and the air intake pipe 6 is from left to right After passing through the front cover 2, the front partition 3 and the rear partition 4, a section is exposed on the right side of the rear partition 4, and the port of the intake pipe 6 exposed on the left side of the front cover 2 is the exhaust gas inlet; the middle core pipe 7 is set Inside the circular tubular housing 1, the middle core pipe 7 passes through the front partition board 3 and the rear partition board 4 from left to right and exposes a section on the right side of the rear partition board 4, and the middle core pipe 7 is on the left side of the front partition board 3. A section is exposed on the side, and the exhaust core pipe 8 passes through the rear end cover 5, the rear partition 4 and the front partition 3 from right to left, and a section is exposed on the left side of the front partition 3, and the exhaust core pipe 8 is on the rear end cover 5 The port exposed on the right side is the exhaust outlet.

The utility model has a compact structure and a reasonable design, and can effectively reduce the exhaust noise in the entire speed range of the engine; because the utility model is a multi-cavity muffler, the impact of the high-temperature and high-pressure airflow on the main muffler is reduced, and the use of the main muffler is prolonged. life. Due to the adjustment function of the multi-cavity, the back pressure of the engine at high speed is low, thus ensuring the power and economy of the engine. It also has the advantages of simple structure, easy manufacture, easy maintenance and low cost.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

Specific Embodiment 1: This embodiment is described in conjunction with FIG. 1. This embodiment consists of a circular tubular housing 1, a front end cover 2, a front partition 3, a rear partition 4, a rear end cover 5, an air intake pipe 6, and an intermediate core pipe. 7. Composed of 8 exhaust core pipes;

The front end cover 2 is sealed and buckled on the left port of the circular tubular housing 1, and the rear end cover 5 is sealed and buckled on the right port of the circular tubular housing 1; Inside the shell 1, the inside of the circular tubular shell 1 is divided into the first chamber 1-1, the second chamber 1-2 and the third chamber 1-3 from left to right, and the air intake pipe 6 is from left to right After passing through the front cover 2, the front partition 3 and the rear partition 4, a section is exposed on the right side of the rear partition 4, and the port of the intake pipe 6 exposed on the left side of the front cover 2 is the exhaust gas inlet; the middle core pipe 7 is set Inside the circular tubular housing 1, the middle core pipe 7 passes through the front partition board 3 and the rear partition board 4 from left to right and exposes a section on the right side of the rear partition board 4, and the middle core pipe 7 is on the left side of the front partition board 3. A section is exposed on the side, and the exhaust core pipe 8 passes through the rear end cover 5, the rear partition 4 and the front partition 3 from right to left, and a section is exposed on the left side of the front partition 3, and the exhaust core pipe 8 is on the rear end cover 5 The port exposed on the right side is the exhaust outlet.

The connection between the circular tubular shell 1, the front end cover 2, the front partition 3, the rear partition 4, the rear end cover 5, the intake pipe 6, the middle core pipe 7 and the exhaust core pipe 8 is a sealed connection. .

The shape of the front end cover 2 , the front partition 3 , the rear partition 4 and the rear end cover 5 is oval.

The intake pipe 6, the middle core pipe 7 and the exhaust core pipe 8 are arranged side by side in sequence.

Specific embodiment 2: This embodiment is described in conjunction with FIG. 1. This specific embodiment is based on the specific embodiment 1. How many openings are uniformly distributed on the wall of the intake pipe 6 exposed in the second chamber 1-2? A vent hole 6-1, a plurality of vent holes 7-1 are evenly distributed on the tube wall of the intermediate core tube 7 exposed in the second chamber 1-2, and a plurality of vent holes 7-1 are exposed in the second chamber 1-2. A plurality of ventilation holes 8-1 are evenly distributed on the pipe wall of the exhaust core pipe 8 .

Specific embodiment three: This embodiment is described in conjunction with Fig. 1. The difference between this specific embodiment and specific embodiment two is that a plurality of ventilation holes 6- 1 is different from the diameter of the plurality of ventilation holes 6-1 on the right side of the tube wall of the inlet pipe 6 in the second chamber 1-2; the diameter of the left side on the tube wall of the middle core tube 7 in the second chamber The diameter of a plurality of ventilation holes 7-1 on the right side of the tube wall of the intermediate core pipe 7 in the second chamber 1-2 is different; the exhaust core pipe in the second chamber 1-2 The multiple ventilation holes 8-1 on the left side of the tube wall of the second chamber 1-2 are different in diameter from the multiple ventilation holes 8-1 on the right side of the tube wall of the exhaust core tube 8 in the second chamber 1-2. Other compositions and connections are the same as those in the second embodiment.

Embodiment 4: This embodiment is described with reference to FIG. 1 . In this embodiment, on the basis of Embodiment 1, a layer of sound-absorbing material 8-2 is provided on the inner circular surface of the middle section of the exhaust core pipe 8 .

working principle:

The intake pipe 6 extends all the way into the third chamber 1-3, so that the high-frequency noise from the exhaust noise of the engine is absorbed in the first chamber 1-1, and the remainder continues to propagate downstream , and generate a labyrinth in the second chamber 1-2, and another part enters the third chamber 1-3 to generate resonance. The middle core tube 7 has a hole zone of a ventilation hole 7-1 on the tube wall, which is located in the second chamber 1-2 here. It is fixed on the front partition 3 and the rear partition 4, starts in the first chamber 1-1, and ends in the third chamber 1-3. Thus, the gas in the third chamber 1-3 enters the first chamber 1-1 and the second chamber 1-2 through the intermediate core tube 7 . The airflow and sound wave pass through the vent hole 7-1 of the middle core tube 7 in the second chamber 1-2. Part of the gas in the second chamber 1-2 and the third chamber 1-3 enters the first chamber 1-1, and then returns to the exhaust core pipe 8, and at the same time in the second chamber 1-2 The gas inside meets the gas entering from the first chamber 1-1 through the multiple vent holes 8-1 on the exhaust core tube 8, and the two sound waves interfere. The result of the interference further reduces the middle and low frequency noise, and finally The sound-absorbing material 8-2 in the exhaust core pipe 8 absorbs the high-frequency noise from the engine and the airflow regeneration noise generated in the muffler, thereby achieving a good noise reduction effect from low frequency to high frequency.

Claims (6)

1. multi-cavity type automobile tail gas noise elimination device, is characterized in that it comprises circle tube form shell body (1), front cover (2), front dividing plate (3), rear bulkhead (4), rear end cover (5), suction tude (6), intermediate core pipe (7), exhaust core pipe (8);

Front cover (2) seal buckle is in the left port of circle tube form shell body (1), and rear end cover (5) seal buckle is in the right output port of circle tube form shell body (1); It is inner that front dividing plate (3), rear bulkhead (4) are all arranged on circle tube form shell body (1), circle tube form shell body (1) inside is partitioned into from left to right the first chamber (1-1), the second chamber (1-2) and the 3rd chamber (1-3), suction tude (6) exposes one section through after front cover (2), front dividing plate (3) and rear bulkhead (4) on rear bulkhead (4) right side from left to right, and the port that suction tude (6) exposes a section in front cover (2) left side is tail gas suction port; It is inner that intermediate core pipe (7) is arranged on circle tube form shell body (1), intermediate core pipe (7) exposes one section through after front dividing plate (3) and rear bulkhead (4) on rear bulkhead (4) right side from left to right, intermediate core pipe (7) exposes one section in the left side of front dividing plate (3), exhaust core pipe (8) right-to-left exposes one section through after rear end cover (5), rear bulkhead (4) and front dividing plate (3) in the left side of front dividing plate (3), and the port that exhaust core pipe (8) exposes a section on rear end cover (5) right side is tail gas exhaust port.

2. multi-cavity type automobile tail gas noise elimination device according to claim 1, equally distributedly on the tube wall that it is characterized in that the suction tude (6) be exposed in the second chamber (1-2) have multiple vent (6-1), equally distributedly on the tube wall being exposed at the intermediate core pipe (7) in the second chamber (1-2) have multiple vent (7-1), equally distributedly on the tube wall being exposed at the exhaust core pipe (8) in the second chamber (1-2) have multiple vent (8-1).

3. multi-cavity type automobile tail gas noise elimination device according to claim 1 and 2, is characterized in that multiple vents (6-1) of the tube wall upper left side of the second chamber (1-2) interior suction tude (6) are different from the diameter of multiple vents (6-1) on right side on the tube wall of suction tude (6) in the second chamber (1-2); Multiple vents (7-1) of the tube wall upper left side of the second chamber (1-2) interior intermediate core pipe (7) are different from the diameter of multiple vents (7-1) on right side on the tube wall of the second chamber (1-2) interior intermediate core pipe (7); Multiple vents (8-1) of the tube wall upper left side of the second chamber (1-2) interior exhaust core pipe (8) are different from the diameter of multiple vents (8-1) on right side on the tube wall of the second chamber (1-2) interior exhaust core pipe (8).

4. multi-cavity type automobile tail gas noise elimination device according to claim 1, the inner headed face that it is characterized in that exhaust core pipe (8) intermediate section is provided with one deck sound-absorbing material (8-2).

5. multi-cavity type automobile tail gas noise elimination device according to claim 1, is characterized in that the shape of described front cover (2), front dividing plate (3), rear bulkhead (4) and rear end cover (5) is for oval.

6. multi-cavity type automobile tail gas noise elimination device according to claim 1, is characterized in that described suction tude (6), intermediate core pipe (7) and exhaust core pipe (8) are arranged side by side successively.