CN103821591A

CN103821591A - Exhaust silencer for city compact car

Info

Publication number: CN103821591A
Application number: CN201410090165.2A
Authority: CN
Inventors: 赵海军; 王国华; 贾丽冬; 王海霞; 常家东; 程广伟
Original assignee: Luoyang Institute of Science and Technology
Current assignee: Luoyang Institute of Science and Technology
Priority date: 2014-03-13
Filing date: 2014-03-13
Publication date: 2014-05-28

Abstract

The invention discloses an exhaust silencer for a city compact car. The exhaust silencer is characterized in that a front clapboard and a back clapboard in a main cavity divide the main cavity into a front cavity, a middle cavity and a back cavity; an air inlet pipe for being connected with an exhaust pipe of the car penetrates through the front cavity and is directly inserted into the middle cavity, the air inlet end of the air inlet pipe is connected with a flange plate, the air outlet end of the air inlet pipe is provided with a flaring, and the pipe wall of the part, which is positioned in the front cavity, of the air inlet pipe is provided with air holes; the front and back ends of a middle pipe respectively extend into the front cavity and the back cavity, the end port at one end, which extends into the back cavity, of the middle pipe is closed, and the pipe wall of the part, which is positioned in the middle cavity, of the middle pipe is provided with air holes; one end of a vent pipe extends into the front cavity, the other end of the vent pipe penetrates through the back cavity and a rear end cover in sequence, and is communicated with the outside, one end, which extends into the front cavity , of the vent pipe is provided with a reducing opening, the pipe tail, at the outside, of the vent pipe is provided with a cylindrical exhaust tail section, and the pipe wall of the part, which is positioned in the back cavity, of the vent pipe is provided with air holes; a front end cover and the rear end cover are both of double layer structures, and a gap exists between each inner layer and the corresponding outer layer. By adoption of the exhaust silencer, exhaust noises can be effectively reduced, and the exhaust silencer is reasonable in design and has good application prospect.

Description

A kind of exhaust silencer for urban small automobile

Technical field

The present invention relates to a kind of automotive muffler, specifically a kind of exhaust silencer for urban small automobile.

Background technique

Pollution from environmental noise, refers to that produced ambient noise exceedes the ambient noise emission standard of national regulation, and disturbs the phenomenon of other people normal life, working and learning.Along with the raising of industrialization degree, noise hazard scope expanding day, traffic noise becomes topmost noise source in current urban environment noise, exhaust sound is the Main Noise Sources of automobile and motor thereof, be to control the most effective noise reduction means that exhaust sound generally adopts and adopt silencing apparatus, urban small automobile is higher in city occupancy.In prior art, the acoustic attenuation performance of most of exhaust silencers depends on and adopts general expansion cavity structure, and sound wave is directly radiated the external world from expansion cavity wall, directly causes noise major part to be directly transmitted to the external world, causes noise pollution.

Therefore, need a kind of exhaust silencer, can effectively stop the radiation to external world of urban small SUV automobile noise sound wave, effectively eliminate or minimizing exhaust sound the environmental pollution that alleviates noise.

Summary of the invention

The present invention seeks to the deficiency for solving the problems of the technologies described above, a kind of exhaust silencer for urban small automobile is provided, it such as has at advantage.

The present invention for solving the problems of the technologies described above adopted technological scheme is: a kind of exhaust silencer for urban small automobile, comprise main cavity, suction tude, outlet pipe and intervalve, and described main cavity is surrounded by chamber wall, front cover and rear end cover; In described main cavity, main cavity is divided into ante-chamber, lumen and back cavity by set front dividing plate and rear bulkhead; Directly be inserted into lumen for the suction tude that connects automobile tail gas pipe through ante-chamber, its suction port end is connected with flange plate, and air outlet end is provided with flaring mouth, and it is positioned on the tube wall of part of ante-chamber and has the pore that a diameter is 6-8mm at least; The rear and front end of intervalve puts in respectively ante-chamber and back cavity, and it reaches one end port closed in back cavity, and it is positioned on the tube wall of lumen part and has the pore that a diameter is 6-8mm at least; One end of outlet pipe puts in ante-chamber, the other end is successively through back cavity and rear end cover, and be communicated with outside, its one end that puts in ante-chamber is provided with gradually closing mouth, be provided with the exhaust rear of straight-tube shape in outside pipe tail place, it is positioned on the tube wall of part of back cavity and has a pore at least, and hole diameter is 2-3mm; Described front dividing plate is provided with has a pore at least; Described front cover and rear end cover are double-deck setting, inside and outsidely have gap between two-layer.

The diameter of the pore on described front dividing plate is 6-12mm, and the porosity is 10-12%, in front dividing plate, has sound-absorbing material.

Described sound-absorbing material is glass wool continuous fibers.

Described front dividing plate and rear bulkhead have right angle flange around.

Beneficial effect is:

A kind of exhaust silencer for urban small automobile of the present invention, designs ingenious; Chamber wall, front cover and the rear end cover of its main cavity adopt double layer construction, can reduce silencing apparatus by case noise radiation, reduce noise; Front dividing plate arranges sound-absorbing material, can carry out medium, high frequency sound absorption, further reduces noise; Intervalve strides across two dividing plates, and one section of sealing increases structural strength, further increases resonant silencing effect; Two stationary barriers are set, and main cavity is divided into three chambeies by two dividing plates, makes whole silencing apparatus internal structure stable, and the gas of discharging is had to damping function, plays and further fall low noise effect; The air outlet of suction tude, the suction port of outlet pipe adopt respectively convergent and diverging shape, can reduce the generation of reproduced air-flow noise in silencing apparatus, further reduce noise; With outer straight-tube shape the exhausting pipe tail mouth of pipe can further reduce the outlet noise of overall silencing apparatus.The present invention can effectively reduce exhaust sound, reasonable in design, has good application prospect.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of exhaust silencer for urban small automobile of the present invention;

Fig. 2 is the generalized section of exhaust silencer shown in Fig. 1 along A-A line;

Fig. 3 is the left view of exhaust silencer shown in Fig. 1;

Fig. 4 is the right elevation of exhaust silencer shown in Fig. 1;

In figure, mark is: 1, main cavity, 11, chamber wall, 12, front cover, 13, rear end cover, 14, ante-chamber, 15, lumen, 16, back cavity, 2, suction tude, 21 flange plate, 22, flaring mouth 3, outlet pipe, 31, gradually closing mouth, 32, exhaust rear, 4, intervalve, 5, front dividing plate, 6, rear bulkhead.

Embodiment

As Figure 1-4, a kind of exhaust silencer for urban small automobile, overall length is 550mm, a kind of exhaust silencer for urban small automobile, comprise main cavity 1, suction tude 2, outlet pipe 3 and intervalve 4, described main cavity 1 is surrounded by chamber wall 11, front cover 12 and rear end cover 13, it is characterized in that: main cavity 1 is divided into ante-chamber 14, lumen 15 and back cavity 16 by the interior set front dividing plate 5 of main cavity 1 and rear bulkhead 6; Directly be inserted into lumen 15 for the suction tude 2 that connects automobile tail gas pipe through ante-chamber 14, its suction port end is connected with flange plate 21, and air outlet end is provided with flaring mouth 22, and it is positioned on the tube wall of part of ante-chamber 14 and has the pore that a diameter is 6-8mm at least; The rear and front end of intervalve 4 puts in respectively ante-chamber 14 and back cavity 16, and it reaches one end port closed in back cavity 16, and it is positioned on the tube wall of lumen 15 parts and has the pore that a diameter is 6-8mm at least; One end of outlet pipe 3 puts in ante-chamber 14, the other end is successively through back cavity 16 and rear end cover 13, and be communicated with outside, its one end that puts in ante-chamber 14 is provided with gradually closing mouth 31, be provided with the exhaust rear 32 of straight-tube shape in outside pipe tail place, it is positioned on the tube wall of part of back cavity 16 and has a pore at least, and hole diameter is 2-3mm; Described front dividing plate 5 is provided with has a pore at least; Described front cover 12 and rear end cover 13 are double-deck setting, inside and outsidely have gap between two-layer.

The diameter of the pore on described front dividing plate 5 is 6-12mm, and the porosity is 10-12%, in front dividing plate 5, has suction material.

Described sound-absorbing material is glass wool continuous fibers.

Described front dividing plate 5 and rear bulkhead 6 have right angle flange around.

The suction tude 2 of exhaust silencer of the present invention is successively through front cover 12, front dividing plate 5; Outlet pipe 3 is successively through front dividing plate 5, rear bulkhead 6 and rear end cover 13; Intervalve 4 front ports are positioned at ante-chamber 14 cavitys, although rear end is arranged in lumen 15, and sealing, sound and air-flow can only enter in ante-chamber 14 by the gross blow hole on intervalve 4.Enter noise in suction tude 2 and enter main cavity 1 on the one hand and eliminate the noise, partial noise by stomatal action in suction tude 2 in ante-chamber 14 to resonant interaction; Due to intervalve 4 one end sealings, the noise in lumen 15 can only enter ante-chamber 14 by intervalve 4 and eliminate the noise, and also has partial noise to eliminate the noise by spilehole on front dividing plate 5; Noise in last ante-chamber 14, by aperture resonant interaction on outlet pipe 3, also has the medium-high frequency sound absorption of the interior glass wool continuous fibers of back cavity 16; The air outlet of suction tude 2, the suction port of outlet pipe 3 and air outlet adopt respectively convergent, diverging shape, are conducive to reduce the generation of reproduced air-flow noise in silencing apparatus, further reduce noise to external world.

Claims

1. the exhaust silencer for urban small automobile, comprise main cavity (1), suction tude (2), outlet pipe (3) and intervalve (4), described main cavity (1) is surrounded by chamber wall (11), front cover (12) and rear end cover (13), it is characterized in that: in main cavity (1), main cavity (1) is divided into ante-chamber (14), lumen (15) and back cavity (16) by set front dividing plate (5) and rear bulkhead (6); Directly be inserted into lumen (15) for the suction tude (2) that connects automobile tail gas pipe through ante-chamber (14), its suction port end is connected with flange plate (21), air outlet end is provided with flaring mouth (22), and it is positioned on the tube wall of part of ante-chamber (14) and has the pore that a diameter is 6-8mm at least; The rear and front end of intervalve (4) puts in respectively ante-chamber (14) and back cavity (16), and it reaches one end port closed in back cavity (16), it is positioned on lumen (15) tube wall partly and has the pore that a diameter is 6-8mm at least; One end of outlet pipe (3) puts in ante-chamber (14), the other end is successively through back cavity (16) and rear end cover (13), and be communicated with outside, its one end that puts in ante-chamber (14) is provided with gradually closing mouth (31), be provided with the exhaust rear (32) of straight-tube shape in outside pipe tail place, it is positioned on the tube wall of part of back cavity (16) and has a pore at least, and hole diameter is 2-3mm; Described front dividing plate (5) is provided with has a pore at least; Described front cover (12) and rear end cover (13) are double-deck setting, inside and outsidely have gap between two-layer.

2. exhaust silencer as claimed in claim 1, is characterized in that: the diameter of the pore on described front dividing plate (5) is 6-12mm, and the porosity is 10-12%, and front dividing plate has sound-absorbing material in (5).

3. the exhaust silencer of stating as claim 2, is characterized in that: described sound-absorbing material is glass wool continuous fibers.

4. exhaust silencer as claimed in claim 1, is characterized in that: described front dividing plate (5) and rear bulkhead (6) have right angle flange around.