EP3405338A1 - Thin sound protection device intended to be arranged against a casing of an electric motor housing for a motor vehicle - Google Patents
Thin sound protection device intended to be arranged against a casing of an electric motor housing for a motor vehicleInfo
- Publication number
- EP3405338A1 EP3405338A1 EP17706843.4A EP17706843A EP3405338A1 EP 3405338 A1 EP3405338 A1 EP 3405338A1 EP 17706843 A EP17706843 A EP 17706843A EP 3405338 A1 EP3405338 A1 EP 3405338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- face
- foam layer
- foam
- heavy
- 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.)
- Withdrawn
Links
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- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Classifications
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- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0869—Insulating elements, e.g. for sound insulation for protecting heat sensitive parts, e.g. electronic components
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-
- 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
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- 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
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Definitions
- Thin acoustic protection device intended to be arranged against an electric motor housing wall for a motor vehicle
- the invention relates to a thin acoustic protection device intended to be disposed against a motor vehicle electric motor housing wall and a mounting architecture of such a device.
- an elastically compressible foam layer comprising a first and a second face respectively having an adhesive character, said layer having a thickness of between 0.5 and 2 mm,
- Such devices have the advantage of having a low thickness for use in areas where the space available around the housing wall is small, and this while providing effective acoustic protection.
- the invention aims to overcome this disadvantage by providing a thin acoustic protection device and allowing good heat dissipation.
- the invention proposes a thin acoustic protection device intended to be arranged against a motor vehicle electric motor housing wall, said device being in the form of a complex comprising: an elastically compressible foam layer comprising a first and a second face respectively having an adhesive character, said layer having a thickness of between 0.5 and 2 mm,
- a heavy layer based on a polymer material in which a powder charge is dispersed said layer being associated with said first face
- said layer of foam has a thermal conductivity, at 25 ° C., greater than or equal to 0.02 W / m ⁇ K, and in particular greater than or equal to
- said heavy layer has a basis weight of between 2.5 and 10 kg / m 2 and an overall thickness of between 1.5 and 10.5 mm, the volume load ratio being between 20 and 55%, the thermal conductivity, at 25 ° C, of said charge being greater than 100 W / mK
- all thickness of the heavy layer is meant its maximum thickness when it has a variable thickness, as is the case when the free face of the heavy layer, as will be seen in a particular embodiment, is shaped so as to have ribs, the overall thickness then being measured between the face associated with the foam layer and the free end of said ribs.
- the adhesive nature of the first face allows the association of the foam layer with the heavy layer.
- the adhesive nature of the second face allows the attachment of the device on a housing wall which can be inclined relative to the horizontal, vertical or downward.
- a device makes it possible to provide localized protection, according to a "patch" principle, on a particularly emissive wall zone in noise.
- the electric motor to be protected is either a main motor of an electric vehicle or an auxiliary motor of an electric or thermal vehicle.
- an effective evacuation of the heat generated by the engine is achieved by a targeted combination of various parameters of the foam layers and the heavy layer, especially in terms of thermal conductivity, which ensures a smooth operation. said engine which is not subject to overheating.
- an appropriate charge rate makes it possible to ensure good contact between the particles of said charge which optimizes the heat dissipation.
- the invention proposes an architecture for mounting such a device.
- FIG. 1 is a schematic sectional view of a device according to one embodiment, said device being mounted against a motor housing wall .
- a thin acoustic protection device 1 intended to be arranged against a motor vehicle electric motor housing wall 9, said device being in the form of a complex comprising: an elastically compressible foam layer 2 comprising a first 3 and a second face 4 respectively having an adhesive character, said layer having a thickness of between 0.5 and 2 mm,
- said layer of foam has a thermal conductivity, at 25 ° C., greater than or equal to 0.02 W / m ⁇ K, and in particular greater than or equal to
- said heavy layer has a basis weight between 2.5 and 10 kg / m 2 and an overall thickness 8 between 1, 5 and 10.5 mm, the load volume being between 20 and 55% , the thermal conductivity, at 25 ° C, of said charge being greater than 100
- the heavy layer 5 may also be provided with an additional low-conductive filler, such as talc, which does not have a thermal conductivity of greater than 100 W / mK at 25 °, insofar as is otherwise present a charge with a volume ratio of between 20 and 55% and a thermal conductivity of 25 ° C greater than 100 W / mK
- an additional low-conductive filler such as talc
- the thermal emissivity of the heavy layer 5 is in particular greater than 0.7, which allows an optimal radiative heat transfer with the environment under standardized conditions of use.
- the polymer material of the heavy layer 5 is, for example, ethylene propylene diene monomer (EPDM) or polyvinyl butyral (PVB).
- EPDM ethylene propylene diene monomer
- PVB polyvinyl butyral
- the foam layer 2 may be adhesive in nature, which avoids the use of adhesive material on the first 3 and second 4 faces. In a variant, it is possible to provide a layer of adhesive material on the first 3 and second 4 faces. In one embodiment, the foam layer 2 is based on acrylic, which gives it a viscoelastic character.
- the foam layer 2 has a density of between 400 and 700 g / l, and especially between 500 and 600 g / l.
- the foam layer 2 has a compression modulus such that the pressure necessary to compress it by 50% is between 0.6 and 1 MPa, being in particular of the order of 0.8 MPa.
- the free face 6 of the heavy layer is shaped so as to have ribs 7.
- ribs 7 make it possible to amplify the heat dissipation by increasing the flow transferred by conduction in said ribs, and also by increasing the convective and radiative exchanges with the outside, this because of the increase in the specific surface area of the ribs. the free face 6 of the heavy layer 5.
- the ribs 7 are derived from the molding of the heavy layer 5. According to the embodiment shown, the ribs 7 are parallel, so as to be in sectional view in the form of crenellations.
- the ribs 7 have a thickness 1 1 of between 1 and 2.5 mm, in particular having a thickness of the order of 1.5 mm.
- the ribs 7 have a height of between 5 and 9 mm, and especially between 6 and 7 mm.
- the load is based on carbon, metal, boron nitride or aluminum, or beryllium oxide, so as to have the expected thermal conductivity.
- the filler has a particle size of between 0.1 and 200 microns.
- the device 1 further comprises a removable protective film disposed against the second face 4 of the foam layer 2, said film being removed to associate said device to the housing wall 9.
- connection architecture of such a device 1 is now described in connection with the figure, said architecture comprising said device and a motor housing wall 9, said device being glued against said wall along substantially the entire surface of the device. second face 4 of the foam layer 2.
- the veneer made between the device 1 and the wall 9 makes it possible to limit the acoustic radiation.
- the housing wall 9 is partially covered by at least one device 1 disposed locally in a housing area of high noise emission. It is also possible for the casing wall 9 to be covered by several devices 1 located in a plurality of zones of high sound emission.
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multimedia (AREA)
- Motor Or Generator Frames (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1650493A FR3046969B1 (en) | 2016-01-21 | 2016-01-21 | THIN-PROTECTIVE DEVICE FOR ACOUSTIC PROTECTION TO BE PROVIDED AGAINST AN ELECTRIC MOTOR HOUSING WALL FOR A MOTOR VEHICLE |
PCT/FR2017/050118 WO2017125690A1 (en) | 2016-01-21 | 2017-01-20 | Thin sound protection device intended to be arranged against a casing of an electric motor housing for a motor vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3405338A1 true EP3405338A1 (en) | 2018-11-28 |
Family
ID=55759803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17706843.4A Withdrawn EP3405338A1 (en) | 2016-01-21 | 2017-01-20 | Thin sound protection device intended to be arranged against a casing of an electric motor housing for a motor vehicle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3405338A1 (en) |
FR (1) | FR3046969B1 (en) |
WO (1) | WO2017125690A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021211532A1 (en) | 2021-10-13 | 2023-04-13 | Zf Friedrichshafen Ag | Drive device with an electric motor and wheel drive with a drive device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998018656A1 (en) * | 1996-10-29 | 1998-05-07 | Rieter Automotive (International) Ag | Ultralight, multifunctional, sound-insulating material assembly |
FR2891865B1 (en) * | 2005-10-07 | 2008-01-18 | Cera | SCREEN FOR THERMAL AND ACOUSTIC PROTECTION OF A VEHICLE COMPONENT |
FR2899171B1 (en) * | 2006-03-31 | 2009-04-10 | Cera | COMPONENT FOR TRIM AND ACOUSTIC PROTECTION OF A MOTOR VEHICLE |
FR2982559B1 (en) * | 2011-11-14 | 2014-01-10 | Cera | THIN-PROTECTIVE DEVICE FOR ACOUSTIC PROTECTION TO BE PROVIDED AGAINST AN ELECTRIC MOTOR HOUSING WALL FOR A MOTOR VEHICLE |
FR3004689B1 (en) * | 2013-04-17 | 2015-06-05 | Cera | SOUNDPROOF PANEL OF MOTOR VEHICLE APRON |
-
2016
- 2016-01-21 FR FR1650493A patent/FR3046969B1/en active Active
-
2017
- 2017-01-20 EP EP17706843.4A patent/EP3405338A1/en not_active Withdrawn
- 2017-01-20 WO PCT/FR2017/050118 patent/WO2017125690A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2017125690A1 (en) | 2017-07-27 |
FR3046969A1 (en) | 2017-07-28 |
FR3046969B1 (en) | 2019-07-19 |
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