EP3707701A1 - Vorrichtung zur absenkung von luft- und körperschall - Google Patents
Vorrichtung zur absenkung von luft- und körperschallInfo
- Publication number
- EP3707701A1 EP3707701A1 EP18804252.7A EP18804252A EP3707701A1 EP 3707701 A1 EP3707701 A1 EP 3707701A1 EP 18804252 A EP18804252 A EP 18804252A EP 3707701 A1 EP3707701 A1 EP 3707701A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- resonator
- resonator chamber
- longitudinal direction
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
Definitions
- the invention relates to a device for lowering of airborne and structure-borne noise with at least one arranged between an inflow and a drain
- a resonator chamber wherein the resonator is delimited transversely to a longitudinal direction outwardly from an outer wall and inwardly from an inner wall, wherein the resonator is bounded longitudinally by a first end wall and a second spaced second end wall, and wherein the inner wall to the adjacent resonator chamber out permeable to air.
- Helmholtz resonators Devices for reducing airborne and structure-borne noise, so-called Helmholtz resonators, are typically constructed so that the communication with a resonance chamber via targeted wall openings in an inner wall, usually an inner tube, inwardly closing the resonator chamber to the resonance chamber adjacent in the radial direction. Through this interaction with the chamber, a counter sound can be generated, which reduces the pressure fluctuations of the
- US Pat. No. 3,955,643 A discloses a device for lowering airborne and structure-borne noise with at least one (namely five resonator chambers) resonator chamber arranged between an inflow and an outflow.
- Resonator chamber bounded transversely to a longitudinal direction outwardly from an outer wall and inwardly from an inner wall. Furthermore, the
- Resonator chamber longitudinally delimited by a first end wall and a spaced second end wall.
- the inner wall is designed permeable to air through the adjacent resonator chamber through wall openings designed as holes.
- a disadvantage of the known device is that for the desired sound absorption of the Innnenwandung resonator chamber toward an additional sound-absorbing layer is upstream.
- This additional sound-absorbing layer is on the one hand relatively expensive and on the other hand influenced by its coverage of the
- a device for lowering airborne and structure-borne noise as an exhaust silencer for motor vehicles is known.
- a resonator chamber is arranged between an inflow and an outflow.
- the device has an inner tube with wall openings as connection to the adjacent resonator chamber.
- the chamber is filled with a sound-absorbing damping material, for example glass fibers.
- the disadvantage here is that is influenced by the complete filling of the resonator with the damping material on the one hand, the "Helmholtz effect" and that on the other hand, the filling of the insulating material in the resonator is relatively expensive and expensive.
- Resonator chamber is formed sound-absorbing by a predetermined permeability.
- the inner wall itself has a sound-absorbing effect by a correspondingly predetermined permeability of the inner wall, without adversely affecting the resonance of the at least one resonator chamber.
- the inner wall may be formed as a sound-absorbing film.
- the inner wall is formed of a non-woven.
- the inner wall is formed of a plastic with a sound-absorbing perforation.
- the inner wall may be formed in particular of a sound-absorbing plastic film, which is formed by a corresponding plurality of perforated holes on the one hand air permeable and the other sound-absorbing.
- the perforation of the formed of a plastic inner wall is designed so that it damps for the passing air flow with their changes in air pressure on the one hand and that the air flow on the other hand but can communicate with the resonator chambers in terms of the Helmholtz effect. The precisely matched perforation thus ensures that both the Helmholtz effect and absorption are possible.
- the inner wall is formed of a foam. Basically, it is also possible to
- Inner wall to form a multi-layered. According to a further preferred embodiment of the invention, the
- Inner wall to the resonator towards additional wall openings, which may be formed as holes or slots.
- Sound-absorbing properties of the inner wall influence the resonant frequencies of the resonator or the resonator chambers.
- Resonator chamber at least one outgoing from the outer wall control bar, which is spaced from the inner wall and parallel to the end walls.
- control webs enables a controlled pressure resonance build-up of the resonator chamber. This will be the
- Influences further increased. While in particular fundamental frequencies are set by the individual resonator chambers, in particular higher-order frequencies can be set or achieved by the control ribs.
- two adjoining resonator chambers are arranged in the longitudinal direction, the second end wall of the first resonator chamber forming the first end wall of the second resonator chamber.
- a structure of resonator chambers and control webs is arranged, which can be tuned specifically to different frequencies. Due to the specific coordination of sound-absorbing inner wall and resonator chambers an extremely broadband Wrkung can be achieved (eg.
- the outer wall and the inner wall are formed as concentrically extending pipe sections.
- the connection between the outer wall and the inner wall takes place in a known manner via the end walls of the resonator or the
- Resonator Such designs are, for example, suitable for lowering airborne and structure-borne noise in conjunction with turbochargers.
- the at least one resonator chamber has a rectangular cross-section transversely to the longitudinal direction.
- the inner wall may be concave in the longitudinal direction and, for example, form an open channel.
- blower fans in conjunction with air conditioning.
- Figure 1 is a side view in section of a device for lowering airborne and structure-borne noise
- Figure 2 is a side view in section of another device for lowering airborne and structure-borne noise
- Figure 3 is a view of the device of Figure 2 along the line III-III
- Figure 4 is a view of the device of Figure 2 along the line IV-IV
- Figure 5 a spatial representation of another device for reducing airborne and structure-borne noise along the line VV of Figure 6 cut and
- FIG. 6 shows a view of the device of FIG. 5 along the line VI-VI
- a device 1 for lowering airborne and structure-borne noise consists essentially of a resonator chamber 2, an outer wall 3, an inner wall 4 of a first end wall 5 and a second end wall 6.
- the resonator chamber 2 is arranged between an inflow 7 and an outflow 8. In a longitudinal direction 9 (im
- Embodiment of Figure 1 a longitudinal axis
- the resonator chamber of the first end wall 5 and the spaced second end wall 6 is limited.
- the two end walls 5, 6 are each annular.
- the resonator chamber 2 is limited to the outside by the outer wall 3 and inwardly of the inner wall 4.
- the resonator chamber 2 has two outgoing from the outer wall 3
- the inner wall 4 is in the area of
- Resonator chamber 2 air-permeable and sound-absorbing formed over its entire length by a predetermined permeability.
- the inner wall 4 is formed from a plastic with a sound-absorbing perforation. In addition to the perforations, the inner wall 4 to
- the wall openings 12 are formed as holes.
- the wall openings may also be formed as slots. According to the embodiments of Figures 1 to 4 are the
- the device 1 'of the embodiment of Figures 2-4 has between the outer wall 3' and the inner wall 4 'a first
- the first resonator chamber 13 is bounded by a first end wall 15 and by a second end wall 16.
- the second end wall 16 forms the second
- Resonator chamber 14 has a first end wall, so that the two resonator chambers 13, 14 have a common end wall 16.
- the second resonator chamber 14 has a second end wall 17 spaced apart in the longitudinal direction 9.
- the annular outer wall 3 ' which is arranged concentrically to the inner wall 4', is shown as a section through the second resonator chamber 14. Accordingly, FIG. 4 shows a section through the first resonator chamber 13 of the device T.
- the first resonator chamber 13 of the device 1 ' has two control webs 18.
- Resonator 14 four control bars 19 on.
- a device 1 "for reducing airborne and structure-borne noise between an inflow 7" and an outflow 8 "along a longitudinal direction 9" has four resonator chambers 20, 21, 22, 23.
- the individual resonator chambers 20, 21, 22, 23 have control bars 24 of different lengths.
- the resonator chambers 20, 21, 22, 23 have a rectangular cross section transversely to the longitudinal direction 9 ", whereby the outer wall 3" runs parallel to the longitudinal direction 9 ", while in the exemplary embodiment of FIGS 4 "in
- the resonator chambers 20, 21, 22, 23 are sealingly covered laterally to a front side by a front side wall 30 and towards a rear side facing away from the front side by a rear side wall 31.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid Mechanics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017126125.7A DE102017126125A1 (de) | 2017-11-08 | 2017-11-08 | Vorrichtung zur Absenkung von Luft- und Körperschall |
| PCT/EP2018/080502 WO2019092038A1 (de) | 2017-11-08 | 2018-11-07 | Vorrichtung zur absenkung von luft- und körperschall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3707701A1 true EP3707701A1 (de) | 2020-09-16 |
| EP3707701B1 EP3707701B1 (de) | 2021-07-28 |
Family
ID=64332275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18804252.7A Active EP3707701B1 (de) | 2017-11-08 | 2018-11-07 | Vorrichtung zur absenkung von luft- und körperschall |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3707701B1 (de) |
| DE (1) | DE102017126125A1 (de) |
| WO (1) | WO2019092038A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131014A (zh) * | 2019-05-30 | 2019-08-16 | 湖州新兴汽车部件有限公司 | 一种高效低流阻汽车消音器 |
| IT201900007854A1 (it) * | 2019-06-03 | 2020-12-03 | Phononic Vibes S R L | Dispositivo di attenuazione acustica per suono propagato lungo un percorso d’aria |
| DE102020100162B4 (de) | 2020-01-07 | 2023-01-12 | Umfotec Gmbh | Vorrichtung zur Absenkung von Luft- und Körperschall |
| DE102022109764B4 (de) | 2022-04-22 | 2025-12-24 | Umfotec Acoustic Solutions GmbH | Schallminderer |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3209861A (en) | 1963-10-28 | 1965-10-05 | Walker Mfg Co | Muffler with two longitudinally separated chambers |
| US3955643A (en) | 1974-07-03 | 1976-05-11 | Brunswick Corporation | Free flow sound attenuating device and method of making |
| DE2609872A1 (de) * | 1976-03-10 | 1977-09-15 | Freudenberg Carl Fa | Schalldaempfer fuer stroemungskanaele |
| DE4413009A1 (de) * | 1994-04-15 | 1995-10-19 | Naeher Georg Gmbh | Schallabsorber für Kraftfahrzeuge |
| EP1085200B1 (de) * | 1999-09-16 | 2003-01-02 | Siemens VDO Automotive Inc. | Veränderbarer Resonator |
| DE102013203960A1 (de) * | 2013-03-08 | 2014-09-11 | Mahle International Gmbh | Frischluftleitung |
| DE102013017276A1 (de) * | 2013-10-17 | 2015-04-23 | Daimler Ag | Verbrennungskraftmaschine, insbesondere für einen Kraftwagen |
| WO2016040431A1 (en) * | 2014-09-09 | 2016-03-17 | 3M Innovative Properties Company | Acoustic device |
| DE102014115898B4 (de) * | 2014-10-31 | 2019-07-25 | Dietrich Denker | Resonator |
| US10971128B2 (en) * | 2015-04-10 | 2021-04-06 | Mra Systems, Llc | Acoustic liner and methods of constructing an acoustic liner |
| DE102015214709A1 (de) * | 2015-07-31 | 2017-02-02 | Mahle International Gmbh | Strömungskanal und Belüftungs-, Heizungs- oder Klimaanlage |
-
2017
- 2017-11-08 DE DE102017126125.7A patent/DE102017126125A1/de not_active Withdrawn
-
2018
- 2018-11-07 EP EP18804252.7A patent/EP3707701B1/de active Active
- 2018-11-07 WO PCT/EP2018/080502 patent/WO2019092038A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019092038A1 (de) | 2019-05-16 |
| DE102017126125A1 (de) | 2019-05-09 |
| EP3707701B1 (de) | 2021-07-28 |
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