CN204552884U - Half active multi-cavity impedance compound muffler - Google Patents
Half active multi-cavity impedance compound muffler Download PDFInfo
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- CN204552884U CN204552884U CN201520221828.XU CN201520221828U CN204552884U CN 204552884 U CN204552884 U CN 204552884U CN 201520221828 U CN201520221828 U CN 201520221828U CN 204552884 U CN204552884 U CN 204552884U
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- outlet end
- pipe
- socket device
- entry end
- sensor socket
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Abstract
The utility model discloses a kind of half active multi-cavity impedance compound muffler that can change adjustment therein structural parameter automatically according to sound deadening capacity under different operating mode, two ends are respectively resistive chamber I and resistive chamber III, centre is resistance chamber II, internal gas path is that perforated pipe is respectively equipped with entry end sensor socket device and outlet end sensor socket device at air flow inlet end and outlet end, embedded entity pipe striking gear is provided with in inlet duct outer end, dividing plate shifter is equipped with at silencing apparatus outer wall left clapboard place and right clapboard place, sound pressure sensor is positioned in the outlet end sensor socket device in silencing apparatus entry end upper inlet end sensor socket device 2 and on muffler outlet end, measure entry end and outlet end sound pressure signal, and passed to controller, controller controls embedded entity pipe striking gear and dividing plate shifter moves, realize the self adaption to operating mode, realize Inter parameter change thus adjust each frequency range sound deadening capacity, realize the sound deadening capacity self adaptive control to operating mode, optimize the NVH performance of automobile.
Description
Technical field
The utility model relates to automobile vibration noise roughness (Noise Vibration Harshness, NVH) performance technologies field, is a kind of half active multi-cavity impedance compound muffler that automatically can regulate internal structure parameter.
Background technique
Along with people are to the attention increasingly of auto NVH performance, the acoustic attenuation performance of automotive muffler becomes study hotspot gradually.At present, the silencing apparatus widely applied is mainly the resistive of simple structure or reactive muffler, the resistive chamber of airflow passes silencing apparatus and resistance chamber, contacts and through the resonant silencing effect of air with resistive material, to realize the object of eliminating the noise.But day by day complicated along with road conditions, the conventional muffler with simple single structure is difficult to the noise elimination demand under satisfied different operating mode, and the sound deadening capacity of different frequency range differs greatly, and under making different operating mode, soundproof effect is undesirable, and driving affect people is experienced.
Summary of the invention
The purpose of this utility model is to improve the deficiency of conventional muffler to change operating mode adaptive capacity, and improve the full frequency band transmission loss of silencing apparatus, the utility model proposes a kind of change half-and-half initiatively multi-cavity complex muffler that can realize self adaptive control for different operating mode, sensor socket device is provided with at air flow inlet end and outlet end, be provided with embedded entity pipe striking gear in inlet duct outer end, in silencing apparatus outer wall left and right, dividing plate place is provided with dividing plate shifter.Sound pressure sensor is positioned in the sensor socket of entry end and outlet end, measures entry end and outlet end sound pressure signal, and is passed to controller, and controller controls embedded entity pipe striking gear and dividing plate shifter moves, and realizes Inter parameter and changes.
The utility model solves the technological scheme that its technical problem adopts: half initiatively multi-cavity impedance compound muffler, two ends are respectively resistive chamber I and resistive chamber III, centre is resistance chamber II, internal gas path adopts perforated pipe, entry end sensor socket device and outlet end sensor socket device is respectively equipped with at air flow inlet end and outlet end, embedded entity pipe striking gear is provided with in inlet duct outer end, dividing plate shifter is equipped with at silencing apparatus outer wall left clapboard place and right clapboard place, sound pressure sensor is positioned in the outlet end sensor socket device in the entry end sensor socket device on silencing apparatus entry end and on muffler outlet end, measure entry end and outlet end sound pressure signal, and passed to controller, controller controls embedded entity pipe striking gear and dividing plate shifter moves, change the sound deadening capacity of different frequency range, realize the self adaption to operating mode, realize Inter parameter to change.The embedded entity tube shifting device of entry end embedded entity pipe is fixed on the embedded pipe of internal layer, outer entry end pipe has rectangle groove, facilitates its side-to-side movement, left clapboard and right clapboard are provided with executor shifting block, muffler shell there is slideway, slides in executor shifting block slideway.
Adopt three cavity impedance composite structures, two ends are resistive chamber, and centre is resistance chamber.Current path adopts perforated pipe, separates in the middle part of perforated pipe with baffle plate, and perforated pipe is filled with sound-absorbing material in outside resistive chamber, is air in perforated pipe external resistance chamber.Have an embedded non-perforated pipe in the perforated pipe of silencing apparatus ingress, available controller controls its elongation, and two dividing plates in resistive chamber and resistance chamber also can control to move left and right with controller, with the flow resistivity of the size and sound-absorbing material that change resistive chamber and resistance chamber.The entry end of silencing apparatus and outlet end are respectively equipped with two sonic transducers, are used for measuring the acoustic signal of entry end and outlet end, thus obtain the sound deadening capacity of silencing apparatus.When actual conditions changes, the sound deadening capacity of silencing apparatus changes, and this change feeds back to controller by data capture and computing device, is controlled the movement of embedded pipe and left baffle by controller.When embedded pipe extends, perforated longer reduces, and air-flow contacts insufficient with sound-absorbing material, and low-frequency range sound deadening capacity increases, and high band sound deadening capacity reduces; When two lateral retaining plates move inward, resistance cavity volume reduces, and sound-absorbing material flow resistivity reduces, air-flow and resistive material area of contact increase, and high band sound deadening capacity increases, and low-frequency range sound deadening capacity reduces, thus can each frequency range sound deadening capacity of adjust structure state modulator be passed through, realize the optimization of NVH performance.
The utility model has the advantages that the transmission loss that can promote different frequency range, and adjust each frequency range sound deadening capacity of silencing apparatus under different operating mode adaptively on this basis, effectively reduce automobile noise.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is silencing apparatus internal structure schematic diagram.
Fig. 2 is the left view of silencing apparatus.
Fig. 3 is external form schematic three dimensional views of the present utility model.
1. silencing apparatus entry ends, 2. entry end sensor socket device, 3. embedded entity pipe striking gear in figure, 4. embedded entity pipe, 5. perforated pipe, 6. sound-absorbing material, 7. left clapboard, 8. cuts off baffle plate, 9. right clapboard, 10. muffler shell, 11. outlet end sensor socket devices, 12. muffler outlet ends, 13. dividing plate shifters, 14. executor shifting blocks, the resistive chamber of I. left end, II. resistance chamber in the middle of, the resistive chamber of III. right-hand member.
Embodiment
In FIG, left end is silencing apparatus entry end 1, entry end sensor socket device 2 place can insert sound pressure sensor for measuring entry end acoustic pressure, silencing apparatus internal duct adopts perforated pipe 5, embedded entity pipe 4 is embedded in entry end pipe, diameter is more smaller than pipe shown in silencing apparatus entry end 1, and can be free to slide.First air-flow flows through the resistive chamber I in left side after left end flows into, by perforated pipe 5 be filled in sound-absorbing material 6 in chamber and contact, part energy is absorbed; Flow through middle resistance chamber II afterwards, due to the obstruct of baffle plate 8, air-flow directly cannot pass through perforated pipe, and therefore the effect of resistance chamber is played, and sacrifices effect a part of sound wave is decayed by resonance; Finally flow through right side resistive chamber III, with resistive chamber, left side in like manner, last air-flow flows out from muffler outlet end 12.3 cavity impedance composite structures can cut down most of acoustic energy, and straight-through structure can not bring larger back pressure again simultaneously.
Middle resistance chamber II is outlet end sound-pressure measurement sensor placement location, and sensor gathers the sound pressure signal that entry end sound pressure sensor socket 2 obtains with outlet end sound pressure sensor socket 11, calculates each frequency range sound deadening capacity of silencing apparatus, and monitors in real time.Have embedded entity pipe striking gear 3 in Fig. 1, controller stirs shifting block, and in controlling, layer entity pipe stretches.Because embedded pipe is embedded in entry end pipe, therefore pipe fluting outside entry end, is fixed on shifting block on embedded entity pipe.When entry end and outlet end sensor record silencing apparatus sound deadening capacity change time, controller controls embedded entity tube shifting device shifting block and moves left and right, embedded entity pipe 4 in figure is made to stretch out or retract, change the resistive chamber middle punch pipe effective length in left side, thus change air-flow and sound-absorbing material area of contact.For ensureing silencing apparatus entry end tightness, the length of embedded pipe is at least 2 times of slideway length, simultaneously for ensureing that entry end sound pressure sensor is measured accurately,, sound pressure sensor is positioned in the outlet end sensor socket device 11 in the entry end sensor socket device 2 on silencing apparatus entry end 1 and on muffler outlet end 12.
Design similar to embedded entity tube shifting device, shown in Fig. 2 central diaphragm shifter 13, two groups of shifting block both sides are also provided with slideway, facilitate shifting block to horizontally slip.Shifting block design is positioned at outside silencing apparatus baffle plate, and is connected with right baffle plate 7, right baffle plate 9.When sensor measurement obtain silencing apparatus sound deadening capacity change time, instruction is sent to controller, controller controls dividing plate shifter 13 block-dialing structure and moves left and right, to change resonant cavity size, simultaneously because right baffle-plate 7 and right baffle plate 9 position change, sound-absorbing material volume changes, thus changes the flow resistivity of sound-absorbing material.As shown in Figure 3, for ensureing the tightness of muffler, left baffle has carried out Widening Design near muffler shell edge section, to keep the tightness of silencing apparatus when baffle plate moves left and right.
Of the present utility modelly focus on horizontally slipping of two place's block-dialing structures, by the mobile Inter parameter changing silencing apparatus of two place's controllable devices, thus change the sound deadening capacity of silencing apparatus.When under a certain operating mode, silencing apparatus high frequency sound deadening capacity is higher, and low frequency sound deadening capacity lower time, two shifting blocks at controller control graph 2 central diaphragm shifter 13 place move respectively to outside that (namely right baffle-plate left, right baffle plate to the right), embedded entity tube shifting device 3 shifting block moves right, and resistance cavity volume is increased, and sound-absorbing material flow resistivity increases, resistive chamber middle punch pipe effective length shortens, and increases low frequency absorption amount; When operating mode changes, silencing apparatus low frequency sound deadening capacity is higher, and high frequency sound deadening capacity lower time, controller control graph 2 central diaphragm shifter 13 place two shifting block moves inward, embedded entity pipe striking gear goes out shifting block and is moved to the left, and resistance cavity volume is reduced, and sound-absorbing material flow resistivity reduces, resistive chamber middle punch pipe effective length is elongated, increases high frequency absorption.
Claims (2)
1. one and half active multi-cavity impedance compound mufflers, two ends are respectively resistive chamber I and resistive chamber III, centre is resistance chamber II, internal gas path adopts perforated pipe (5), it is characterized in that: be respectively equipped with entry end sensor socket device (2) and outlet end sensor socket device (11) at air flow inlet end and outlet end, embedded entity pipe striking gear (3) is provided with in inlet duct outer end, dividing plate shifter (13) is equipped with at silencing apparatus outer wall left clapboard (7) place and right clapboard (9) place, sound pressure sensor is positioned in the outlet end sensor socket device (11) in the entry end sensor socket device (2) on silencing apparatus entry end (1) and on muffler outlet end (12), measure entry end and outlet end sound pressure signal, and passed to controller, controller controls embedded entity pipe striking gear (3) and moves with dividing plate shifter (13), change the sound deadening capacity of different frequency range, realize the self adaption to operating mode, realize Inter parameter to change.
2. half active multi-cavity impedance compound muffler according to claim 1, it is characterized in that: the embedded entity tube shifting device of entry end embedded entity pipe (4) is fixed on the embedded pipe of internal layer, outer entry end pipe there is rectangle groove, facilitate its side-to-side movement, left clapboard (7) and right clapboard (9) are provided with executor shifting block (14), muffler shell there is slideway, slides in executor shifting block (14) slideway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221828.XU CN204552884U (en) | 2015-04-14 | 2015-04-14 | Half active multi-cavity impedance compound muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221828.XU CN204552884U (en) | 2015-04-14 | 2015-04-14 | Half active multi-cavity impedance compound muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204552884U true CN204552884U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520221828.XU Expired - Fee Related CN204552884U (en) | 2015-04-14 | 2015-04-14 | Half active multi-cavity impedance compound muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204552884U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981236A (en) * | 2020-07-14 | 2020-11-24 | 江苏科技大学 | Silencing device for actively modulating frequency and changing stop band and silencing method thereof |
| CN113838447A (en) * | 2021-09-08 | 2021-12-24 | 青岛海尔空调器有限总公司 | Control method and system of silencer |
-
2015
- 2015-04-14 CN CN201520221828.XU patent/CN204552884U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981236A (en) * | 2020-07-14 | 2020-11-24 | 江苏科技大学 | Silencing device for actively modulating frequency and changing stop band and silencing method thereof |
| CN113838447A (en) * | 2021-09-08 | 2021-12-24 | 青岛海尔空调器有限总公司 | Control method and system of silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20190414 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |