CN207194997U - Silencer - Google Patents

Abstract

The utility model provides a kind of silencer.The silencer includes housing, first partition, second partition, air inlet pipe, escape pipe and passive valve with receiving space, the receiving space is separated into front cavity, middle cavity and rear chamber by the first partition and the second partition, the air inlet pipe sequentially passes through the housing, the first partition and the second partition and stretched in the rear chamber, the escape pipe sequentially passes through the housing, the second partition and the first partition and stretched in the front cavity, and the passive valve is in the first partition.Silencer provided by the utility model inside silencer by setting passive valve, and when the exhaust back pressure in the lumen body is more than preset value, opened under airflow function of the passive valve in lumen body to connect the middle cavity and the front cavity, so as to meet the matching of the exhaust noise of engine and back pressure under different rotating speeds, muffler volume can not only be reduced, and middle and slow speed of revolution sound deadening capacity can be increased.

Description

Silencer

Technical field

Motor vehicle exhaust system field is the utility model is related to, specifically, being related to a kind of silencer.

Background technology

In face of automobile market flourish, in recent years customer the riding comfort of automobile is proposed it is higher and higher will Ask, this brings no small challenge to the NVH performances of vehicle.The exhaust of one of important sources as vehicle noise contribution is made an uproar Sound, there is no small influence to the NVH performances of vehicle.

In the process of running, due to the effect of its firing interval, exhaust airstream can form the pulse of certain rule to engine, So as to produce certain exhaust noise, especially become apparent under middle and slow speed of revolution (under middle and slow speed of revolution, engine order noise Easily low-frequency noise is encouraged).Eliminated the noise in the prior art using traditional muffler desing structure, for example, passing through three pipe fans Road adds sound-absorbing material to carry out noise elimination.According to existing design, this muffler desing structure can meet that in general is eliminated the noise and want Ask, if in order to reach NVH target calls, it is necessary to increase 10L muffler volumes, therefore, this muffler desing structure is to one The high vehicle of a little NVH performance requirements, the especially vehicle in the case of silencer arrangement space anxiety, its acoustic attenuation performance is much Not enough.

Utility model content

In order to solve the above-mentioned technical problem, the utility model, which provides one kind, can reduce muffler volume and increase middle and slow speed of revolution The silencer of sound deadening capacity.

The technical solution of the utility model is as follows：

A kind of silencer, including：

Housing, there is receiving space；

First partition and second partition, interval are separated into ante-chamber in the receiving space and by the receiving space Sound attenuation hole is equipped with body, middle cavity and rear chamber, the first partition and the second partition to be sequentially communicated the ante-chamber Body, the middle cavity and the rear chamber；

Air inlet pipe, sequentially pass through the housing, the first partition and the second partition and stretch in the rear chamber；

Escape pipe, sequentially pass through the housing, the second partition and the first partition and stretch in the front cavity；

Passive valve, in the first partition, when the exhaust back pressure in the lumen body is more than preset value, the quilt Opened under dynamic airflow function of the valve in the lumen body to connect the middle cavity and the front cavity.

Preferably, the passive valve includes being fixedly arranged in the first partition and the valve body support formed with a passage, setting In on the valve body support to cover the valve of the passage and be fixedly arranged on the valve body support and flexibly support the valve The flexible member of door, when the exhaust back pressure in the lumen body is more than preset value, gas of the valve in the lumen body Stream effect is lower to open to cause the passage connection middle cavity and the front cavity and make the flexible member that bullet occur Property deformation, wherein, the aperture of the passage is more than the aperture of the sound attenuation hole.

Preferably, the valve body support include being fixed in the first partition and fixed part annular in shape, from described solid Determine portion's inner peripheral and bend extension towards the middle cavity to the front cavity direction with through the leg of the first partition and certainly The first extension and the second extension that two opposite ends of the fixed part are extended, wherein, the leg enclose to be formed it is described Passage.

Preferably, the valve body support also includes being fixedly arranged on sealing ring of the fixed part away from the leg side.

Preferably, the flexible member includes the first flexible member and the second flexible member, first flexible member Both ends are fixedly connected with first extension and the valve respectively, and one end of second flexible member is prolonged with described second Extending portion is fixedly connected, and the other end abuts with the valve.

Preferably, first flexible member and second flexible member are spring leaf.

Preferably, the valve body support also includes from second extension along the bearing of trend of second flexible member Extend formed spacing catch, when second flexible member occur elastic deformation when, second flexible member because deformation with The spacing catch at least partly fitting with cause second flexible member can deformation length reduce.

Preferably, be located in the lumen body one section of the air inlet pipe is provided with gas outlet.

Preferably, be located in the rear chamber one section of the escape pipe is provided with through hole, provided with one section of the through hole Sleeve pipe is provided with the outside of the escape pipe.

Preferably, sound-absorbing material is filled between the escape pipe and described sleeve pipe.

The beneficial effect of silencer of the present utility model is：By setting passive valve inside silencer, and work as lumen Opened when internal exhaust back pressure is more than preset value, under airflow function of the passive valve in the lumen body described to connect Middle cavity and front cavity, so as to meet the matching of the exhaust noise of engine and back pressure under different rotating speeds, noise elimination can not only be reduced Device volume, and middle and slow speed of revolution sound deadening capacity can be increased.

Brief description of the drawings

, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings Other accompanying drawings are obtained, wherein：

Fig. 1 is the exploded view of silencer provided by the utility model；

Fig. 2 is the stereogram after the assembling of silencer shown in Fig. 1；

Fig. 3 is sectional view of the silencer shown in Fig. 2 along D-D directions；

Fig. 4 is sectional view of the silencer shown in Fig. 2 along F-F directions；

Fig. 5 is the enlarged drawing of a parts in silencer shown in Fig. 4；

Fig. 6 is the stereogram of passive valve in silencer shown in Fig. 1；

Fig. 7 is the exploded view of passive valve shown in Fig. 6.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The all other embodiment obtained, belong to the scope of the utility model protection.

Fig. 1 to Fig. 5 is please referred to, the silencer 100 includes housing 1 and first partition with receiving space A 2nd, second partition 3, air inlet pipe 4, escape pipe 5 and passive valve 6.The first partition 2 and the interval of the second partition 3 are located at described Front cavity 1A, middle cavity 3A and rear chamber 5A, the He of first partition 2 are separated into receiving space A and by the receiving space A Sound attenuation hole B is equipped with the second partition 3 to be sequentially communicated the front cavity 1A, the middle cavity 3A and the rear chamber 5A, the air inlet pipe 4 sequentially pass through the housing 1, the first partition 2 and the second partition 3 and stretch to the rear chamber In 5A, the escape pipe 5 sequentially passes through the housing 1, the second partition 3 and the first partition 2 and stretches to the ante-chamber In body 1A, the passive valve 6 is in the first partition 2, when the exhaust back pressure in the middle cavity 3A is more than preset value, Opened under airflow function of the passive valve 6 in the middle cavity 3A to connect the middle cavity 3A and front cavity 1A.

In the present embodiment, preset value is under the conditions of the rotating speed of 1.5TD engines is 3000rpm in the middle cavity 3A Exhaust back pressure value, when the rotating speed of engine is in below 3000rpm, the passive valve 6 is closed, and passes through the air inlet Pipe 4 enter the silencer 100 inside air-flow by the first partition 2 and the second partition 3 with the sound attenuation hole B Enter the front cavity 1A afterwards, the air-flow into the front cavity 1A is discharged by the escape pipe 5；When the rotating speed of engine exists During more than 3000rpm, the passive valve 6 is in opening, and the air-flow in the middle cavity 3A can be entered by the passive valve 6 Enter in the front cavity 1A, to match the rotating speed of engine balance of engine noise and exhaust back pressure in more than 3000rpm, So as to improve the smoothness of exhaust airstream and reduce noise.But the present embodiment is not limited thereto, in other embodiments, Rational preset value can also be set according to specific noise reduction demand.

Please further in conjunction with refering to Fig. 1, Fig. 3 and Fig. 4, the housing 1 include the first housing 11 and with first housing 11 Air-tightness connection to form the second housing 13 of the receiving space A to enclose.

Referring to Fig. 1, be located in the middle cavity 3A one section of the air inlet pipe 4 is provided with gas outlet 41, i.e.,：It is described The inside of air inlet pipe 4 is connected by the gas outlet 41 with the middle cavity 3A, so as to be advantageous to reduce exhaust back pressure.

Referring to Fig. 3, be located in the rear chamber 5A one section of the escape pipe 5 is provided with through hole 51, and provided with The outside of the escape pipe 5 of 51 1 sections of the through hole is provided with sleeve pipe 7, i.e.,：The inside of the escape pipe 5 by the through hole 51 with The escape pipe 5 encloses the space to be formed with described sleeve pipe 7 and connected, so as to eliminate the middle height when escape pipe 5 is vented Frequency noise.In the present embodiment, sound-absorbing material (not shown) is filled between the escape pipe 5 and described sleeve pipe 7.

Fig. 1, Fig. 2 and Fig. 4 are please referred to Fig. 7, the passive valve 6 includes being fixedly arranged in the first partition 2 and shape The valve body support 61 of Cheng Youyi channel Cs, on the valve body support 61 to cover the valve 63 of the channel C and be fixedly arranged on On the valve body support 61 and the flexible member 65 of the valve 63 is flexibly supported, when the exhaust back pressure in the middle cavity 3A is big Opened when preset value, under airflow function of the valve 63 in the middle cavity 3A to cause described in the channel C connection Middle cavity 3A and the front cavity 1A and make the flexible member 65 that elastic deformation occur, wherein, the aperture of the channel C is big In the aperture of the sound attenuation hole B.

The valve body support 61 includes being fixed in the first partition 2 and fixed part 611 annular in shape, from the fixation The inner peripheral of portion 611 is towards the middle cavity 3A to front cavity 1A directions bending extension with through the leg of the first partition 2 613rd, the first extension 615 and the second extension 616 that extend from two opposite ends of the fixed part 611 and it is fixedly arranged on institute Sealing ring 617 of the fixed part 611 away from the side of leg 613 is stated, wherein, the leg 613 encloses to form the channel C.

The flexible member 65 includes the first flexible member 651 and the second flexible member 653, first flexible member 651 both ends are fixedly connected with first extension 615 and the valve 63 respectively, and the one of second flexible member 653 End is fixedly connected with second extension 616, and the other end abuts with the valve 63.Wherein, closed when the valve 63 is in During closed state, first flexible member 651 and second flexible member 653 are equal to described to the active force of the valve 63 Active force of the air-flow to the valve 63 when exhaust back pressure in middle cavity 3A is preset value.I.e.：When in the middle cavity 3A When exhaust back pressure is below preset value, the valve 63 is closed, when the exhaust back pressure in the middle cavity 3A is pre- Opened if be worth the above, under airflow function of the valve 63 in the middle cavity 3A to cause described in the channel C connection Middle cavity 3A and the front cavity 1A and make first flexible member 651 and second flexible member 653 that elasticity occur Deformation.In the present embodiment, first flexible member 651 and second flexible member 653 are spring leaf, and described first Flexible member 651 and one end of first extension 615 and the valve 63 and second flexible member 653 with it is described Second extension 616 is fixedly connected by screw or bolt.

In order to prevent that the stroke of valve 63 is excessive caused by the exhaust back pressure in the middle cavity 3A is excessive, so as to lead Second flexible member 653 is caused to depart from the valve 63, the valve body support 61 is also included from second extension 616 Extend the spacing catch 618 to be formed along the bearing of trend of second flexible member 653, when second flexible member 653 is sent out During raw elastic deformation, second flexible member 653 is at least partly bonded with the spacing catch 618 with described in causing because of deformation Second flexible member 653 can deformation length reduce.Due to second flexible member 653 can deformation length reduce, it can The stress coefficient increase of deformation part, so as to effectively prevent the stroke of valve 63 excessive.In the present embodiment, the limit Position 618 shape in curved surface of catch, and when the stroke of valve 63 is bigger (：When the unlatching size of the valve 63 is bigger), institute State spacing catch 618 and second flexible member 653 to be bonded length longer, i.e.,：Second flexible member 653 can shape It is smaller to become length.

The beneficial effect of silencer provided by the utility model is：By setting passive valve 6 inside silencer 100, And the exhaust back pressure in central cavity 3A is when being more than preset value, under airflow function of the passive valve 6 in the middle cavity 3A Open to connect the middle cavity 3A and front cavity 1A, so as to meet of the exhaust noise of engine and back pressure under different rotating speeds Match somebody with somebody, muffler volume can not only be reduced, and middle and slow speed of revolution sound deadening capacity can be increased.

Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in Other related technical fields, are similarly included in scope of patent protection of the present utility model.

Claims (10)

1. A kind of 1. silencer, it is characterised in that including：

   Housing, there is receiving space；

   First partition and second partition, interval in the receiving space and by the receiving space be separated into front cavity, in Sound attenuation hole is equipped with cavity and rear chamber, the first partition and the second partition to be sequentially communicated the front cavity, institute State middle cavity and the rear chamber；

   Air inlet pipe, sequentially pass through the housing, the first partition and the second partition and stretch in the rear chamber；

   Escape pipe, sequentially pass through the housing, the second partition and the first partition and stretch in the front cavity；

   Passive valve, in the first partition, when the exhaust back pressure in the lumen body is more than preset value, the passive valve Opened under airflow function in the lumen body to connect the middle cavity and the front cavity.
2. 2. silencer according to claim 1, it is characterised in that the passive valve includes being fixedly arranged in the first partition And valve body support formed with a passage, on the valve body support to cover the valve of the passage and be fixedly arranged on described On valve body support and the flexible member of the valve is flexibly supported, when the exhaust back pressure in the lumen body is more than preset value, Opened under airflow function of the valve in the lumen body to cause the passage to connect the middle cavity and the ante-chamber Body and make the flexible member that elastic deformation occur, wherein, the aperture of the passage is more than the aperture of the sound attenuation hole.
3. 3. silencer according to claim 2, it is characterised in that the valve body support includes being fixed on the first partition Upper and fixed part annular in shape, from the fixed part inner peripheral towards the middle cavity to the front cavity direction extension is bent to pass through The first extension and the second extension worn the leg of the first partition and extended from two opposite ends of the fixed part, Wherein, the leg encloses to form the passage.
4. 4. silencer according to claim 3, it is characterised in that the valve body support also includes being fixedly arranged on the fixed part Sealing ring away from the leg side.
5. 5. silencer according to claim 3, it is characterised in that the flexible member includes the first flexible member and second Flexible member, the both ends of first flexible member are fixedly connected with first extension and the valve respectively, and described One end of two flexible members is fixedly connected with second extension, and the other end abuts with the valve.
6. 6. silencer according to claim 5, it is characterised in that first flexible member and second flexible member It is spring leaf.
7. 7. silencer according to claim 6, it is characterised in that the valve body support is also included from second extension Extend the spacing catch to be formed along the bearing of trend of second flexible member, when elastic deformation occurs for second flexible member When, second flexible member because deformation is at least partly bonded with the spacing catch can with cause second flexible member Deformation length reduces.
8. 8. according to the silencer any one of claim 1-7, it is characterised in that the air inlet pipe is located at the middle cavity Interior one section is provided with gas outlet.
9. 9. according to the silencer any one of claim 1-7, it is characterised in that the escape pipe is located at the rear chamber Interior one section is provided with through hole, and sleeve pipe is provided with the outside of the escape pipe provided with one section of the through hole.
10. 10. silencer according to claim 9, it is characterised in that filled with suction between the escape pipe and described sleeve pipe Sound material.