US20140202668A1 - Sheild device - Google Patents

Sheild device Download PDF

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Publication number
US20140202668A1
US20140202668A1 US14/342,518 US201214342518A US2014202668A1 US 20140202668 A1 US20140202668 A1 US 20140202668A1 US 201214342518 A US201214342518 A US 201214342518A US 2014202668 A1 US2014202668 A1 US 2014202668A1
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US
United States
Prior art keywords
hollow bodies
sheet metal
metal layer
metallic hollow
encapsulation
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.)
Abandoned
Application number
US14/342,518
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English (en)
Inventor
Ralf Krus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal Mogul Sealing Systems GmbH
Original Assignee
Federal Mogul Sealing Systems GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal Mogul Sealing Systems GmbH filed Critical Federal Mogul Sealing Systems GmbH
Assigned to FEDERAL-MOGUL SEALING SYSTEMS GMBH reassignment FEDERAL-MOGUL SEALING SYSTEMS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRUS, RALF
Publication of US20140202668A1 publication Critical patent/US20140202668A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes

Definitions

  • the present invention relates to a device for shielding temperature-sensitive components vis-à-vis heat sources, for example in the engine compartment of a motor vehicle, in particular vis-à-vis considerable radiated heat as a result of exhaust-carrying components. Furthermore, the device comprises a sound-deadening and sound-insulating design. In particular, the invention relates to a device that can be re-used without additional expenditure, and that can be used as encapsulation or as partial shielding.
  • heat-shielding plates are used to carry out the task of temperature shielding.
  • Said heat-shielding plates protect vehicle components from heat emanating from the engine, catalytic converter, muffler, exhaust train or other hot components.
  • the components to be protected are predominantly located in the engine. compartment or in the subfloor. This includes, for example, plastic components, electronic components or fluid-carrying lines in the engine compartment, cables, the fuel tank, suspension devices of the exhaust system, and the body floor in the subfloor region.
  • Heat-shielding plates have been used for a long time in the automotive industry. These plates can be designed as simple single-layer plates, as insulated plates, or in so-called sandwich construction. Insulated plates comprise a single-sheet carrier plate, a heat-resistant insulation layer and a cover layer.
  • a heat-shielding plate in sandwich construction can be made from two structural plates that prior to being joined have been three-dimensionally deformed independently of each other with the use of deep-drawing techniques.
  • an insulation layer can be placed between the two structural plates.
  • heat-shielding plates can also be used as sound-insulating devices if the structural plate exposed to the sound source is perforated in the insulated region. The heat-shielding plate can thus also act as a sound absorber.
  • Heat-shielding plates are often designed as self-supporting constructions, and among other things have to meet the following criteria: they need to keep away sufficient heat; in the case of an impact they must provide safety insulation between hot components and sensitive parts; they must withstand the vibrations experienced during the life cycle of the vehicle; and they must be economical to produce. Acoustic efficiency is an additional positive characteristic of a heat-shielding plate.
  • a heat-shielding plate in sandwich construction in other words a two-layer heat-shielding plate, is generally stiffer and more vibration resistant than a single-layer heat-shielding plate.
  • the cost is higher, because for each structural plate a tool needs to be made, and because in principle at least three process steps are necessary in order to deform the two shells and to join them.
  • heat-shielding plates merely comprise two plates joined by clinching, which plates have essentially no space between each other.
  • the insulation property of such heat-shielding plates is not very good because no insulation material can be put in place.
  • the connections established by toxing, clinching, spot welding or roll seam welding can become loose or even detached. Rattling noises can thus arise that are undesirable in a vehicle.
  • Various motor vehicle manufacturers require the use of heat-shielding plates with flanged edges, at least in those regions in which the heat-shielding plate needs to be handled by a mechanic.
  • shielding comprising:
  • the metallic hollow bodies are arranged as a type of bulk material comprising, for example, hollow spheres between two plates.
  • the inner sheet metal layer which faces the heat source and/or sound source, comprises perforation in order to let the sound reach the open-pore structure of the hollow bodies.
  • the outer sheet metal layer of the above-mentioned material construction is used to receive the fill comprising hollow bodies, thus circumferentially enclosing it by means of a flanged edge around the inner layer.
  • Further connection methods include toxing, clinching, spot welding or roll seam welding.
  • the plurality of metallic hollow bodies comprises at least two different external diameters and/or at least two different wall thicknesses.
  • the hollow space is better filled, because the spaces between larger hollow bodies can be filled by smaller hollow bodies.
  • the wall thickness of the hollow bodies can be varied. Walls that are less thick result in a more lightweight shielding device and improve the thermal insulation and sound absorption, but on the other hand also result in easier compressibility of the device, which compressibility may at times even be desirable. By means of walls that are less thick it is also possible to compensate for the greater rigidity of smaller hollow bodies relative to larger hollow bodies with otherwise identical wall thicknesses.
  • a further variation option relates to the degree of filling of the hollow bodies between the two pieces of sheet metal and the option of being able to press the compound structure of layers to different overall thicknesses. By pressing the layers to different overall thicknesses it is also possible to deform individual hollow bodies so that other body geometries can also result. Furthermore, it is possible for the component in the region of attachment by screwing to be pressed to such an extent that the material no longer displays any settling behaviour in this region.
  • the outer sheet metal layer at its edge is flanged over the perforated inner sheet metal layer.
  • the edge of the perforated sheet metal layer which edge may be sharp, is covered as a result of this.
  • the use of sheet metal layers that can be produced economically but that comprise sharp edges is thus possible without the need for any reworking of the edge of the perforated sheet metal layer, without this resulting in an increased danger of injury or damage.
  • the maximum diameter of the metallic hollow bodies does not exceed 1 ⁇ 4 of the maximum height of the hollow space.
  • the maximum diameter in the case of non-spherical hollow bodies is the respective maximum external diameter of all the possible diameters.
  • the height of the hollow space is the perpendicular space between the perforated inner and outer sheet metal layers.
  • the hollow bodies can also be fixed, for example by means of suitable adhesives. It is also possible to bind the hollow bodies more firmly to each other by means of at least partial elastic deformation, for example by pressing the sheet metal layers together. A rough surface design or a corresponding coating of the hollow bodies may also be considered in order to keep the relative movements among hollow bodies at least small as a result of high friction. Coating the metallic hollow bodies can also improve the thermal insulation and/or sound absorption.
  • the metallic hollow bodies comprise high-temperature-resistant stainless steel.
  • other materials can also be used, wherein in this case the temperature resistance and if applicable the necessary corrosion resistance can be ensured, for example with the use of a coating process.
  • the metallic hollow bodies are essentially spherical in shape.
  • the spherical shape represents a simple and expedient shape on the one hand to fill the hollow space well, while on the other hand to maintain the porosity required for thermal insulation and sound absorption.
  • the spherical shape ensures good mechanical stability also of a collection of only loosely bulked hollow bodies.
  • other shapes are also possible, provided an adequate degree of filling with the necessary porosity can be achieved by them, and provided mechanical stability is ensured.
  • the hollow bodies can be closed per se or can comprise openings, for example small holes, wherein the variant without openings or holes is preferred because the outer wall of the hollow bodies is preferably porous.
  • a machine component comprising:
  • metallic hollow bodies in a shape matching the shape of the hot component to be encapsulated are produced as a type of envelope of the component.
  • said hollow spheres are interconnected, thus forming a self-supporting encapsulation that does not require the use of self-supporting sheet metal layers.
  • No outer sheet metal layer is provided.
  • the maximum diameter of the metallic hollow bodies does not exceed 1 ⁇ 4 of the maximum height of the encapsulation.
  • the diameter of the hollow bodies is selected so as to be between 1.5 mm and 10 mm.
  • Half-shells can preferably be sintered separately as 3-D shells without a hot component in the tool. In this process, two half-shells are then mounted around the hot component as an enclosed encapsulation.
  • the machine component comprises an outer enclosure of the encapsulation in the form of a sheet metal layer.
  • FIG. 1 shows a cross section of an embodiment of a heat-shielding plate according to the invention.
  • FIG. 2 shows a cross section of an embodiment of an encapsulation according to the invention.
  • FIG. 1 shows a cross section of a heat-shielding plate according to a first embodiment of the invention.
  • the heat-shielding plate is used to shield a hot component 1 that emits heat in the form of radiation heat.
  • the heat-shielding plate comprises an inner sheet metal layer 3 with through-holes 2 that form perforations.
  • An outer sheet metal layer 4 is flanged around the perforated sheet metal layer 2 in such a manner that in-between a hollow space is defined.
  • this hollow space is filled with metallic hollow bodies 5 that in the example shown comprise, for example, a spherical or elliptical shape.
  • the plurality of hollow bodies 5 provides low thermal conductivity or good insulation characteristics while at the same time providing a low overall weight of the heat-shielding plate.
  • the thinnest possible wall thicknesses of the hollow bodies 5 are preferred, on the one hand to keep the weight to a minimum, and on the other hand to keep the formation of thermal bridges to a minimum.
  • the hollow bodies 5 can be filled in the heat-shielding plate essentially in the form of loose bulk fill, i.e. without being interconnected by means of bonding, welding or similar. It is possible to achieve relative firm cohesion by compressing the inner and outer sheet metal layers, and consequently the hollow space is compressed in height, and the hollow bodies 5 are pressed against each other. In this process at least partial plastic deformation of the hollow bodies 5 can be desirable.
  • the plurality of hollow bodies 5 comprises at least two different diameters.
  • a greater degree of filling of the hollow space is achieved.
  • the effective surface area can be increased in order to absorb heat.
  • An essentially circular or elliptical shape of the hollow bodies 5 is preferred in order to be able to keep the surface of the contact points between hollow bodies or between hollow bodies and sheet metal layers to a minimum.
  • the insulation effect is improved because the heat is impeded in its ability to penetrate the shielding plate in the direction of the outer sheet metal layer 4 .
  • the transmission of vibrations and sound to the outer sheet metal layer 4 is impeded.
  • FIG. 2 shows a cross-sectional view of an encapsulation according to a further embodiment of the invention.
  • a component 10 for example part of an exhaust gas system, is encapsulated.
  • Encapsulation comprises a plurality of hollow bodies 15 and has been placed without a space or clearance onto the component to be encapsulated.
  • the hollow bodies 15 are interconnected by means of sintering.
  • a rigid self-supporting structure is formed that conforms to the three-dimensional shape of the component 10 , which shape can also be very complex. Consequently, in terms of thermal insulation, weight and sound absorption similar advantages are achieved as is the case with the shielding plate of FIG.
  • Encapsulation is associated with an advantage in that the heat is kept in the hot component and is transmitted onwards in order to achieve a faster rise in the temperature of the exhaust gas pipe during the cold start phase. This also contributes to reducing CO 2 emissions and prolongs the service life of the engine. Furthermore, the exhaust gas energy is increased, e.g. for heating various systems (catalytic converter). Electricity generation would also be imaginable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
US14/342,518 2011-09-06 2012-05-07 Sheild device Abandoned US20140202668A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011082167A DE102011082167B3 (de) 2011-09-06 2011-09-06 Abschirmvorrichtung
DE102011082167.8 2011-09-06
PCT/EP2012/058323 WO2013034320A1 (de) 2011-09-06 2012-05-07 Abschirmvorrichtung

Publications (1)

Publication Number Publication Date
US20140202668A1 true US20140202668A1 (en) 2014-07-24

Family

ID=46197237

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/342,518 Abandoned US20140202668A1 (en) 2011-09-06 2012-05-07 Sheild device

Country Status (5)

Country Link
US (1) US20140202668A1 (de)
EP (1) EP2753505B1 (de)
CN (1) CN103747983A (de)
DE (1) DE102011082167B3 (de)
WO (1) WO2013034320A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012110268A1 (de) * 2012-10-26 2014-04-30 Elringklinger Ag Verbessertes Wärmeabschirmsystem

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030118762A1 (en) * 2001-12-21 2003-06-26 Brown Daniel V. Turbine noise absorber
US20080075912A1 (en) * 2006-08-24 2008-03-27 Bruno Malinek Shielding component, in particular a heat shield

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737248C2 (de) * 1977-08-18 1985-09-19 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Bauteil hoher Festigkeit mit komplizierter geometrischer Form und Verfahren zu dessen Herstellung
US4415512A (en) * 1979-07-20 1983-11-15 Torobin Leonard B Method and apparatus for producing hollow metal microspheres and microspheroids
FR2537099B1 (fr) * 1982-12-01 1986-03-14 Buralkin Vadim Conteneur resistant a la chaleur et aux chocs
DE3902032A1 (de) * 1989-01-25 1990-07-26 Mtu Muenchen Gmbh Gesintertes leichtbaumaterial mit herstellungsverfahren
US4925740A (en) * 1989-07-28 1990-05-15 Rohr Industries, Inc. Hollow metal sphere filled stabilized skin structures and method of making
US5777947A (en) * 1995-03-27 1998-07-07 Georgia Tech Research Corporation Apparatuses and methods for sound absorption using hollow beads loosely contained in an enclosure
DE19917874B4 (de) * 1998-04-20 2005-03-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Thermische Isolation zum Einbringen zwischen zu isolierende Gebilde
DE19925492A1 (de) * 1999-06-04 2000-12-07 Vaw Ver Aluminium Werke Ag Wärmeabschirmblech
CH696310A5 (de) * 2003-05-06 2007-03-30 Erbengemeinschaft Tibor Nemeth Mehrlagiges Wärmeabschirmblech.
WO2005084854A1 (ja) * 2004-03-09 2005-09-15 National University Corporation Kagawa University 中空金属球構造体、中空金属球成形体および中空金属球構造体の製造方法
JP4655277B2 (ja) * 2006-01-23 2011-03-23 トヨタ自動車株式会社 構造体
DE102006058989A1 (de) * 2006-12-14 2008-06-19 Elringklinger Ag Abschirmbauteil, insbesondere Hitzeschild

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030118762A1 (en) * 2001-12-21 2003-06-26 Brown Daniel V. Turbine noise absorber
US20080075912A1 (en) * 2006-08-24 2008-03-27 Bruno Malinek Shielding component, in particular a heat shield

Also Published As

Publication number Publication date
DE102011082167B3 (de) 2013-02-28
EP2753505A1 (de) 2014-07-16
EP2753505B1 (de) 2016-06-22
WO2013034320A1 (de) 2013-03-14
CN103747983A (zh) 2014-04-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FEDERAL-MOGUL SEALING SYSTEMS GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KRUS, RALF;REEL/FRAME:032339/0922

Effective date: 20140106

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION