CN206329367U

CN206329367U - Silencer and vehicle

Info

Publication number: CN206329367U
Application number: CN201621343241.7U
Authority: CN
Inventors: 王瑞峰
Original assignee: Borgward Automotive China Co Ltd
Current assignee: Borgward Automotive China Co Ltd
Priority date: 2016-12-08
Filing date: 2016-12-08
Publication date: 2017-07-14
Anticipated expiration: 2026-12-08

Abstract

This disclosure relates to a kind of silencer and vehicle.The silencer includes suppressor case (10), the dividing plate (20) that the suppressor case (10) is divided into two chambers is provided with the suppressor case (10), multiple through holes (21) are provided with the dividing plate (20), the silencer also includes block piece (50), and the block piece (50) can the through hole (21) to block varying number mobile relative to the dividing plate (20).The silencer of the disclosure blocks quantity by adjusting the position of block piece with change through hole, so as to change total conducting area of through hole, the frequency of noise elimination for realizing silencer can adjust.

Description

Silencer and vehicle

Technical field

This disclosure relates to silencer field, in particular it relates to a kind of silencer and the vehicle with the silencer.

Background technology

With the development of automotive engineering, client is to auto NVH performance requirement more and more higher, the noise needs that engine is sent Eliminated by special silencer and reduced, the acoustical absorptivity of silencer directly determines the quality of performance.In general, hair is eliminated The low-frequency noise of motivation needs by resonance exhaust silencer or expands silencer, and the high-frequency noise that eliminate engine then needs By increasing the resistive materials such as acoustical cotton.Traditional resonance exhaust silencer only works in a certain fixed frequency range, and to eliminate multiple The noise of frequency range, then need the combination of multiple resonance exhaust silencers, but so, and silencer needs to be made big or very It is many.From the point of view of current passenger-car chassis space, it is quite big to implement difficulty, and can also increase very in terms of cost and weight It is many.

Utility model content

The purpose of the disclosure is to provide a kind of adjustable silencer of frequency of noise elimination.

To achieve these goals, the disclosure is provided sets in a kind of silencer, including suppressor case, the suppressor case It is equipped with the dividing plate that the suppressor case is divided into two chambers, the dividing plate and is provided with multiple through holes, the silencer also includes Block piece, the block piece can block the through hole of varying number relative to the dividing plate movement.

Alternatively, the silencer also includes the baffle position governor motion for being used to drive the block piece movement.

Alternatively, the baffle position governor motion includes motor and electric machine controller, the inside of the suppressor case Baroceptor is additionally provided with, the pressure value that the electric machine controller is measured according to the baroceptor controls the motor work Make.

Alternatively, the baffle position governor motion includes motor and electric machine controller, and the electric machine controller is according to hair The rotating speed of motivation controls the motor work.

Alternatively, the baffle position governor motion includes tooth bar, gear housing and gear, and the tooth bar is fixed on described On block piece, the gear is arranged in the gear housing, the tooth bar through the gear housing and with the gear phase Engagement, motor described in the motor controller controls drives the pinion rotation, and then by being blocked described in the rack drives Part is moved on the dividing plate.

Alternatively, the gear housing, the motor and the electric machine controller are arranged on the outer of the suppressor case Portion, one end of the tooth bar is fixed with the block piece, and the other end passes through the suppressor case to be meshed with the gear.

Alternatively, the multiple through hole is arranged in arrays, and the baffle position governor motion drives the block piece edge logical Length direction or the width movement of hole matrix.

Alternatively, the rectangular tabular of the block piece, the length of the length direction of the block piece and the via matrix Direction is parallel, and the length of the block piece is less than the length of the via matrix, and the width of the block piece is equal to or more than institute State the width of via matrix.

Alternatively, the dividing plate is generally rectangular, the length direction of the length direction of the via matrix and the dividing plate Parallel, the via matrix is located at the side of the symmetry axis along its length of the dividing plate, and the baffle position adjusts machine Structure drives width of the block piece along the via matrix to move.

Alternatively, the baffle position governor motion drives the block piece to do pendular movement.

Alternatively, the suppressor case includes inner casing and shell, and heat-barrier material is filled between the inner casing and shell.

Alternatively, the inner casing is provided with sound absorption aperture.

The silencer of the disclosure blocks quantity by adjusting the position of block piece with change through hole, so as to change through hole Total conducting area, the frequency of noise elimination for realizing silencer can adjust.

The disclosure also to provide and be in series with silencer on a kind of vehicle, including gas exhaust piping, the gas exhaust piping, wherein, this disappears Sound device is silencer as described above.

Other feature and advantage of the disclosure will be described in detail in subsequent embodiment part.

Brief description of the drawings

Accompanying drawing is, for providing further understanding of the disclosure, and to constitute a part for specification, with following tool Body embodiment is used to explain the disclosure together, but does not constitute limitation of this disclosure.In the accompanying drawings：

Fig. 1 is a kind of perspective view of the silencer of embodiment according to the disclosure, wherein, block piece is in limit inferior position Put；

Fig. 2 is a kind of perspective view of the silencer of embodiment according to the disclosure, wherein, block piece is in limes superiors position Put；

Fig. 3 is a kind of sectional view of the silencer of embodiment according to the disclosure, wherein, block piece is in limit inferior position Put；

Fig. 4 be baffle position governor motion a kind of embodiment in section components sectional view.

Description of reference numerals

The inner casing of 10 suppressor case 11

The heat-barrier material of 12 shell 13

The 14 sound absorption dividing plates of aperture 20

The expansion cavity of 21 through hole 30

The block piece of 40 resonant cavity 50

The gear housing of 61 tooth bar 62

The air inlet pipe of 63 gear 70

80 escaping pipes

Embodiment

It is described in detail below in conjunction with accompanying drawing embodiment of this disclosure.It should be appreciated that this place is retouched The embodiment stated is merely to illustrate and explained the disclosure, is not limited to the disclosure.

In the disclosure, in the case where not making opposite explanation, the noun of locality used such as " upper and lower " typically refers to corresponding attached Figure page it is upper and lower；" inside and outside " refers to that each part is inside and outside relative to its own profile.

As shown in Figure 1 to Figure 3, according to an aspect of this disclosure there is provided a kind of silencer, including suppressor case 10, Dividing plate 20, air inlet pipe 70 and escaping pipe 80, suppressor case 10 define internal chamber, and dividing plate 20 is arranged in the internal chamber And the internal chamber is separated into expansion cavity 30 and resonant cavity 40, dividing plate 20 is provided with multiple through holes 21, air inlet pipe 70 and outlet Pipe 80 connects expansion cavity 30, then gas flows into expansion cavity 30 through air inlet pipe 70, is discharged through escaping pipe 80.

When the high temperature and high pressure gas of engine discharge enter the expansion cavity 30 inside silencer by air inlet pipe 70, expansion cavity 30 mutation accumulated using pipeline section in duct acoustics cause the change of acoustic impedance, eliminate the mid-frequency noise of gas；Also, gas When body enters expansion cavity 30, it can be intercepted with the central resonance frequency identical exhaust noise of resonant cavity 40 by resonant cavity 40, Standing wave is formed in resonant cavity 40 and resonance is produced, so that the exhaust noise for this frequency that disappears.

Wherein, the central resonance frequency of resonant cavity 40 is：In formula, C represents the velocity of sound, and Sc represents through hole Total conducting area, V represents resonant cavity volume, and lc represents block board thickness.

As the main inventive concept of the disclosure, as shown in Figure 1 to Figure 3, the silencer of the disclosure also includes block piece 50 With baffle position governor motion, block piece 50 is sticked on dividing plate 20 to block through hole 21, and baffle position governor motion is used to drive Dynamic block piece 50 is moved on dividing plate 20, to change the conducting quantity of through hole 21.

The silencer of the disclosure by adjusting the position of block piece 50 to change the conducting quantity of through hole 21, so as to change logical Total conducting area in hole 21, the frequency of noise elimination for realizing silencer can adjust.Here, total conducting area of through hole 21 is equal to through hole 21 conducting quantity is multiplied by the aperture of through hole 21.The aperture of through hole 21 and quantity can be set according to actual needs, for example, through hole 21 aperture can be 3~5mm.

In the disclosure, as a kind of embodiment, as shown in Figure 1 to Figure 3, block piece 50 can be fully located at silencer The inside of housing 10, and size of the size less than dividing plate 20 of the block piece 50.It is used as another embodiment, silencer shell Slotted eye can be provided with body 10, sealing ring can be provided with around slotted eye, block piece 50 can through the slotted eye and with the sealing Circle is brought into close contact.

In the disclosure, block piece 50 can do the motion of any appropriate format on dividing plate 20, for example, translation, rotation Or pendular movement.

In the disclosure, multiple through holes 21 can be arranged on dividing plate 20 in various appropriate modes, for example, arrange circular, Ellipse, triangle etc..As a kind of embodiment, as depicted in figs. 1 and 2, multiple through holes 21 are arranged in arrays, block piece 50 It can be moved along the length direction L or width W of via matrix.

Block piece 50 can have various appropriate shapes.It is used as a kind of embodiment, as depicted in figs. 1 and 2, block piece 50 rectangular tabulars, the length direction of block piece 50 is parallel with the length direction L of the via matrix, and the length of block piece 50 is small In the length of the via matrix, the width of block piece 50 is equal to or more than the width of the via matrix.In this case, When block piece 50 length direction L along the via matrix or width W are moved, the quantity of through hole 21 increases in ladder Or decline.

In order to ensure that block piece 50 has enough spaces so that all through holes 21 is all unlimited.It is used as a kind of embodiment party Formula, as depicted in figs. 1 and 2, suppressor case 10 are substantially in rectangular shape, and dividing plate 20 is generally rectangular, the via matrix Length direction L it is parallel with the length direction of dividing plate 20, the via matrix is located at along its length symmetrical of dividing plate 20 Axle A-A side, the baffle position governor motion driving block piece 50 is moved down on the width W along the via matrix It is dynamic.

When block piece 50 is in the lower limit position shown in Fig. 1, the quantity for the through hole 21 that the part 50 that is blocked is blocked is most, The conducting minimum number of through hole 21, total conducting area of through hole 21 is minimum, and the central resonance frequency of resonant cavity 40 is minimum；Blocking During width W of the part 50 from the lower limit position shown in Fig. 1 along the via-hole array is moved up, through hole 21 is led Logical quantity gradually increases, and total conducting area of through hole 21 gradually increases, the central resonance frequency rise of resonant cavity 40；Work as block piece During 50 upper extreme position shown in Fig. 2, the quantity for the through hole 21 that the part 50 that is blocked is blocked is zero, and all through holes 21 are all led Logical, total conducting area of through hole 21 is maximum, the central resonance frequency highest of resonant cavity 40.

In the disclosure, the baffle position governor motion can have various appropriate structures.It is used as a kind of embodiment party Formula, as shown in Figures 1 to 4, the baffle position adjustment structure can include tooth bar 61, gear housing 62, gear 63, motor and Electric machine controller (not shown), tooth bar 61 is fixed on block piece 50, and gear 63 is arranged in gear housing 62, and tooth bar 61 is worn Cross gear housing 62 and be meshed with gear 63, motor controller controls motor-driven gear 63 is rotated, and then passes through tooth bar 61 Block piece 50 is driven to be moved on dividing plate 20.Here, gear housing 62 is prevented from tooth bar 61 and disengaged from gear 63, it is ensured that two Person is in engagement all the time.

In order to avoid the performance to silencer is impacted, it is preferable that as shown in Figure 1 to Figure 3, gear housing 62, motor The outside of suppressor case 10 is arranged at electric machine controller, one end and the block piece 50 of tooth bar 61 are fixed, and the other end is passed through Suppressor case 10 with gear 63 to be meshed.

Embodiment is shown for Fig. 1 to Fig. 3, the center that silencer when obtaining different heights of baffle plate can be calculated first is total to Vibration frequency, then the formula that the frequency changes with height of baffle plate is fitted, frequency and the relation of height of baffle plate between the two are determined, and Electric machine controller is set according to this relation.In practical application, the rotating speed and rotating speed of engine as needed and noise frequency it Between frequency multiplication relation, electric machine controller according to the current rotating speed controlled motor of engine operate, motor-driven gear 63, gear 63 Band carry-over bar 61 and block piece 50 are moved up and down, so as to change total conducting area of through hole 21 so that the resonant cavity 40 of silencer Central resonance frequency be placed exactly at target noise frequency, so can both obtain the best noise elimination effect at target noise frequency Really.When the rotation speed change of engine, silencer adjusts the height of block piece 50 therewith, you can so that the silencer is always maintained at In good soundproof effect state.The rotary speed information of engine can come from vehicle ECU.

As another embodiment, baroceptor, electric machine controller root can be set inside suppressor case 10 The pressure value controlled motor operating measured according to the baroceptor, motor-driven gear 63, gear 63 is with carry-over bar 61 and blocks Part 50 is moved up and down, so as to change total conducting area of through hole 21 so that the central resonance frequency of the resonant cavity 40 of silencer is just It is located at target noise frequency well.

In addition, for the respective embodiments described above, can further optimize.Specifically, suppressor case 10 can include interior Shell 11 and shell 12, and the filling with insulation material 13 between inner casing 11 and shell 12, as shown in figure 3, expansion cavity 30 and resonant cavity 40 are respectively positioned on the inside of inner casing 11.The silencer formation double-decker being so designed that, can reduce silencer appearance surface vibration and The secondary radiation noise of generation.In addition, when high-temperature gas is by silencer, silencer internal temperature can be raised, and heat is passed It is handed to the outer wall of housing.Obviously, suppressor case 10 is designed as after double insulation structure, the temperature of housing exterior walls can be reduced Degree, it is to avoid human body is scalded, improves safety coefficient.The heat-barrier material filled between inner casing 11 and shell 12 can be heat-insulated asbestos, Can also be heat barrier foam, or other have the material of heat insulating function.

In addition, can set sound absorption aperture 14 as described in Figure 3, on inner casing 11, the hole wall for the aperture 14 that absorbs sound can be using resistance Buddhist nun's sound-absorbing material is made.So, after gas enters inner casing 11, sound absorption aperture 14 can also reduce gas to a certain extent and make an uproar Sound.

Except above-mentioned silencer, the disclosure also to provide and be in series with root on a kind of vehicle, including gas exhaust piping, the gas exhaust piping According to the silencer described in any of the above-described embodiment.

The preferred embodiment of the disclosure is described in detail above in association with accompanying drawing, still, the disclosure is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out with technical scheme of this disclosure Monotropic type, these simple variants belong to the protection domain of the disclosure.

It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the disclosure to it is various can The combination of energy no longer separately illustrates.

In addition, can also be combined between a variety of embodiments of the disclosure, as long as it is without prejudice to originally Disclosed thought, it should equally be considered as disclosure disclosure of that.

Claims

1. it is provided with a kind of silencer, including suppressor case (10), the suppressor case (10) by the suppressor case (10) it is divided into the dividing plate (20) of two chambers, multiple through holes (21) is provided with the dividing plate (20), it is characterised in that is described to eliminate the noise Device also includes block piece (50), and the block piece (50) can the through hole to block varying number mobile relative to the dividing plate (20) (21)。

2. silencer according to claim 1, it is characterised in that the silencer also includes being used to drive the block piece (50) mobile baffle position governor motion.

3. silencer according to claim 2, it is characterised in that the baffle position governor motion includes motor and motor Controller, the inside of the suppressor case is additionally provided with baroceptor, and the electric machine controller is according to the air pressure sensing The pressure value that device is measured controls the motor work.

4. silencer according to claim 2, it is characterised in that the baffle position governor motion includes motor and motor Controller, the electric machine controller controls the motor to work according to the rotating speed of engine.

5. the silencer according to claim 3 or 4, it is characterised in that the baffle position governor motion also includes tooth bar (61), gear housing (62) and gear (63), the tooth bar (61) are fixed on the block piece (50), and the gear (63) sets Put in the gear housing (62), the tooth bar (61) is mutually nibbled through the gear housing (62) and with the gear (63) Close, motor described in the motor controller controls drives the gear (63) to rotate, and then drives institute by the tooth bar (61) Block piece (50) is stated to move on the dividing plate (20).

6. silencer according to claim 5, it is characterised in that the gear housing (62), the motor and the electricity Machine controller is arranged on the outside of the suppressor case (10), and one end of the tooth bar (61) and the block piece (50) are solid Fixed, the other end passes through the suppressor case (10) to be meshed with the gear (63).

7. silencer according to claim 2, it is characterised in that the multiple through hole (21) is arranged in arrays, the gear Board position governor motion drives length direction (L) or width (W) of the block piece (50) along via matrix mobile.

8. silencer according to claim 7, it is characterised in that the rectangular tabular of the block piece (50), described to block The length direction of part (50) is parallel with the length direction (L) of the via matrix, and the length of the block piece (50) is less than described The length of via matrix, the width of the block piece (50) is equal to or more than the width of the via matrix.

9. silencer according to claim 8, it is characterised in that the dividing plate (20) is generally rectangular, the through hole square The length direction (L) of battle array is parallel with the length direction of the dividing plate (20), and the via matrix is located at the edge of the dividing plate (20) The side of the symmetry axis (A-A) of its length direction, the baffle position governor motion drives the block piece (50) to lead to along described The width (W) of hole matrix is mobile.

10. silencer according to claim 2, it is characterised in that blocked described in the baffle position governor motion driving Part (50) does pendular movement.

11. silencer according to claim 1, it is characterised in that the suppressor case (10) include inner casing (11) and Shell (12), is filled with heat-barrier material (13) between the inner casing (11) and shell (12).

12. silencer according to claim 11, it is characterised in that the inner casing is provided with sound absorption aperture (14).

13. be in series with silencer on a kind of vehicle, including gas exhaust piping, the gas exhaust piping, it is characterised in that the silencer is Silencer in claim 1-12 described in any one.