CN2929198Y

CN2929198Y - Automobile silencer

Info

Publication number: CN2929198Y
Application number: CN 200620075982
Authority: CN
Inventors: 蔡俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-24
Filing date: 2006-07-24
Publication date: 2007-08-01
Anticipated expiration: 2016-07-24

Abstract

The utility model discloses a silencer utilized in automobile, which comprises a shell, an air admission port and an exhaust tail pipe, a cavity that channels to the exhaust tail pipe is provided in the shell, and the utility model is characterized in that the shape of the cavity is a combination of a cylinder and a frustum of a cone the top of which is the air admission port, a cone shaped conical guide plate is arranged in the cavity, the top of the cone points to the direction of the air admission port, the angle of the top of the cone lies somewhere between 45 degrees and 75 degrees, a baffle board is fixedly arranged in the bottom of the cone, flow-guide holes are provided on the baffle board, the exhaust tail pipe goes through the baffle board and is fixedly connected with the baffle board. The utility model effectively reduces the noises made by air blast, avoids the high frequency noises and convolutions made by sudden changes of the air pressure, thereby creating very small noises, and the utility model is applicable to various kinds of automobile.

Description

Automotive muffler

Technical field

The utility model relates to a kind of silencer for gas flow or venting gas appliance of motor, is specifically related to the silencing apparatus that a kind of motor car engine is used.

Background technique

Along with developing rapidly of automotive industry, also more and more stricter to the management of The automobile noise control.Engine exhaust noise is the main noise source of automobile, and adopting exhaust silencer rational in infrastructure is to reduce effective, the simplest approach of car load pass-by noise.

In the prior art, the silencing apparatus that is connected on the vehicle engine exhaust gas tapping equipment generally comprises housing, housing one end is a suction port, and the other end is an outlet tail piece, and the centre is provided with expansion chamber, be used for to the waste gas step-down of discharging, usually, one air inlet pipeline inwardly is set, is distributed with a plurality of holes at Qi Bishang from suction port, when air-flow is discharged from the Kong Zhongxiang side, significantly expand, realize step-down, simultaneously, between expansion chamber and outlet tail piece import, dividing plate is set, to reduce the transmission of sound,, can consider to prolong outlet tail piece in order to improve acoustic attenuation performance, but outlet tail piece is long, can't adapt to the installing space on the vehicle.In the silencing apparatus of said structure, because the restriction of structure can produce following noise: when high pressure draught enters in the silencing apparatus, can produce the impact sounding in exhaust process; The high frequency sound that air-flow Rapid Expansion when aperture enters expansion chamber causes; The impulsive sound of air-flow when outlet tail piece is expelled to air.In said structure, utilize the sound insulation of dividing plate and outlet tail piece to alleviate preceding two kinds of noises usually, and alleviate impulsive sound by improved shape to the outlet tail piece outlet port.

Because the method that said structure adopts is because of impacting and the isolation of sound is carried out in expansion after sounding, be difficult to the noise elimination effect that reaches desirable, thereby people are at the continuous new silencer of research.

Summary of the invention

The utility model purpose provides a kind ofly can effectively extenuate gas shock power, reduces the automotive muffler of the noise that produces because of the stream pressure sudden change.

For achieving the above object, the technical solution adopted in the utility model is: a kind of automotive muffler, comprise housing, suction port and tailpipe, be provided with the inner chamber that is communicated with tailpipe in the housing, described cavity shape is to be the circular cone and the cylindrical combination of end face with the suction port, be provided with cone shape deflector cone in the inner chamber, the vertex of a cone is aimed at the suction port direction, cone-apex angle is between 45 ° to 75 °, the frustum face form fit of conical surface and inner chamber, the awl bottom surface is installed with dividing plate, is distributed with pod apertures on the dividing plate, and described tailpipe penetrates dividing plate and fixedlys connected with dividing plate.

In the technique scheme, be equally spaced between described deflector cone and the internal chamber wall, and fixedly connected with internal chamber wall by at least 3 fixed blocks.

Though deflector cone can be fixed through tailpipe and housing by dividing plate, but consider that the vibrations in the use can influence the stability of air-flow path in the inner chamber, be provided with above described fixed block, this fixed block can be that two ends are separately fixed at connecting rod or the connecting sheet on deflector cone and the internal chamber wall, and preferred scheme is along circumferential equally distributed 3 to 6 connecting sheets.When off-gas flows when suction port enters silencing apparatus, impinge upon on the deflector cone at an angle, it is coniform that deflector cone is, changed the flow direction of air-flow, high temperature and high pressure gas diffusion is uniformly come, because the toroidal surface of the passage that constitutes between deflector cone and internal chamber wall for increasing continuously, the diffusion of air-flow be gradually rather than volatile, air-flow is after the expansion step-down, evenly clash into the suppressor case wall, again by the end cap resilience, enter the exhaust cavity of deflector cone inside by the pod apertures on the dividing plate, discharge from tailpipe.

The impulsive sound and the rate of expansion that influence air-flow understood in being provided with of cone-apex angle, and usually, cone-apex angle can be arranged between 45 ° to 75 °, and preferred cone-apex angle is between 55 ° to 62 °, and preferred cone-apex angle is 60 °.

Further technological scheme, described tailpipe tail end be evenly expansion formation empennage outwards, and empennage inside is provided with the coniform minute flow cone of the vertex of a cone in managing, and divides flow cone to fixedly connected with tailpipe through at least 3 fixed blocks, and cone-apex angle is between 30 ° to 45 °.

Optimized technical scheme, the cone-apex angle of described minute flow cone are between 30 ° to 40 °, and the expansion angle of empennage is between 40 ° to 48 °.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

1. the utility model is provided with cone shape guide plate, and is provided with the housing inner chamber with its form fit, has reduced the impulsive sound of air-flow effectively, simultaneously, the air-flow path of circular continuous expansion, high frequency sound and the eddy current of having avoided the air pressure sudden change to cause have reduced the generation of noise effectively.

2. the tailpipe tail end is outwards evenly expanded empennage and the coniform minute flow cone of the inner vertex of a cone that is provided with of empennage in pipe that constitutes, and makes tail gas be shunted once more and step-down, has effectively weakened the impulsive sound of gas outlet.

3. because the utility model does not need with dividing plate length direction to be separated into a plurality of chambers and realizes sound insulation, can reduce the length of silencing apparatus, thereby reduced volume has been saved material.

Description of drawings

Accompanying drawing 1 is the utility model embodiment one a structure cross-sectional schematic;

Accompanying drawing 2 is the A-A sectional view of Fig. 1;

Accompanying drawing 3 is the worm's eye view of Fig. 1.

Wherein: 1, housing 2, suction port 3, tailpipe 4, inner chamber 5, deflector cone; 6, dividing plate 7, pod apertures 8, connecting rod 9, empennage 10, branch flow cone 11, connector bar.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: shown in accompanying drawing 1 to 3, a kind of automotive muffler, comprise housing 1, suction port 2 and tailpipe 3, be provided with the inner chamber 4 that is communicated with tailpipe 3 in the housing 1, described cavity shape is to be the circular cone and the cylindrical combination of end face with the suction port, be provided with cone shape deflector cone 5 in the inner chamber 4, the vertex of a cone is aimed at the suction port direction, cone-apex angle is 60 °, the awl bottom surface is installed with dividing plate 6, is distributed with pod apertures 7 on the dividing plate 6, and described tailpipe 3 penetrates dividing plate 6 and fixedlys connected with dividing plate, be equally spaced between deflector cone 5 and the internal chamber wall, and fixedly connected with internal chamber wall by 6 connecting rods 8.

In the present embodiment, described tailpipe tail end is evenly expansion formation empennage 9 outwards, and empennage 9 inside are provided with the coniform minute flow cone 10 of the vertex of a cone in pipe, divides flow cone to fixedly connected with tailpipe 3 through 6 connector bars 11, cone-apex angle is 30 °, and the expansion angle of empennage 9 is 45 °.

Between frustum and hull outside plate, can fill asbestos layer; In outlet end cap one side, also can fill asbestos layer, with further reduction noise.

Embodiment two: a kind of automotive muffler, comprise housing, suction port and tailpipe, be provided with the inner chamber that is communicated with tailpipe in the housing, described cavity shape is to be the circular cone and the cylindrical combination of end face with the suction port, is provided with cone shape deflector cone in the inner chamber, and the vertex of a cone is aimed at the suction port direction, cone-apex angle is between 45 ° to 75 °, the awl bottom surface is installed with dividing plate, is distributed with pod apertures on the dividing plate, and described tailpipe penetrates dividing plate and fixedlys connected with dividing plate; Be equally spaced between described deflector cone and the internal chamber wall, and fixedly connected with internal chamber wall by 3 connecting sheets.

Described tailpipe tail end is evenly expansion formation empennage outwards, empennage inside is provided with the coniform minute flow cone of the vertex of a cone in pipe, divide flow cone to fixedly connected with tailpipe through 3 connecting sheets, cone-apex angle is between 30 ° to 45 °, and the expansion angle of outlet pipe empennage is between 40 ° to 48 °.

Claims

1. automotive muffler, comprise housing [1], suction port [2] and tailpipe [3], be provided with the inner chamber [4] that is communicated with tailpipe [3] in the housing [1], it is characterized in that: described cavity shape is to be the circular cone and the cylindrical combination of end face with the suction port, be provided with cone shape deflector cone [5] in the inner chamber [4], the vertex of a cone is aimed at the suction port direction, cone-apex angle is between 45 ° to 75 °, the frustum face form fit of conical surface and inner chamber, the awl bottom surface is installed with dividing plate [6], be distributed with pod apertures [7] on the dividing plate [6], described tailpipe [3] penetrates dividing plate [6] and fixedlys connected with dividing plate [6].

2. automotive muffler according to claim 1 is characterized in that: be equally spaced between described deflector cone [5] and the internal chamber wall, and fixedly connected with internal chamber wall by at least 3 fixed blocks.

3. automotive muffler according to claim 1 is characterized in that: described cone-apex angle is between 55 ° to 62 °.

4. automotive muffler according to claim 1, it is characterized in that: described tailpipe [3] tail end is evenly expansion formation empennage [9] outwards, empennage [9] inside is provided with the coniform minute flow cone [10] of the vertex of a cone in pipe, divide flow cone [10] to fixedly connected with tailpipe [3] through at least 3 fixed blocks, cone-apex angle is between 30 ° to 45 °.

5. automotive muffler according to claim 4 is characterized in that: described minute flow cone [10] cone-apex angle between 30 ° to 40 °, the expansion angle of empennage is between 40 ° to 48 °.