WO2012104069A1 - Élément de découplage, notamment pour systèmes d'échappement - Google Patents

Élément de découplage, notamment pour systèmes d'échappement Download PDF

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Publication number
WO2012104069A1
WO2012104069A1 PCT/EP2012/000434 EP2012000434W WO2012104069A1 WO 2012104069 A1 WO2012104069 A1 WO 2012104069A1 EP 2012000434 W EP2012000434 W EP 2012000434W WO 2012104069 A1 WO2012104069 A1 WO 2012104069A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating material
decoupling element
bellows
element according
carrier
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.)
Ceased
Application number
PCT/EP2012/000434
Other languages
German (de)
English (en)
Inventor
Immo GÄRTNER
Holger Hebisch
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.)
BOA Balg und Kompensatoren Technologie GmbH
Original Assignee
BOA Balg und Kompensatoren Technologie 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 BOA Balg und Kompensatoren Technologie GmbH filed Critical BOA Balg und Kompensatoren Technologie GmbH
Publication of WO2012104069A1 publication Critical patent/WO2012104069A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • 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
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features having thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints; Joints allowing movement
    • F16L27/10—Adjustable joints; Joints allowing movement comprising a flexible connection only
    • F16L27/107—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • F16L27/111—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations the bellows being reinforced
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube with several corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
    • F16L59/185—Adjustable joints; Joints allowing movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/21—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for expansion-compensation devices
    • 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
    • F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
    • F01N2470/12—Tubes being corrugated

Definitions

  • the invention relates to decoupling element, in particular for exhaust pipes of internal combustion engines in motor vehicles, with a bellows and a heat insulation.
  • Decoupling elements are installed as intermediate pieces in exhaust ⁇ lines of motor vehicles to largely decouple movements and vibrations.
  • the decoupling ⁇ element has a movable bellows made of metal, which has a strip wound hose for the purpose of exhaust gas guidance and protection of the bellows in the interior.
  • a layer made up of a plurality of layers with the shape of a hollow cylinder is arranged.
  • CONFIRMATION COPY Disadvantage of this and similar types are for a re-induced ⁇ flexibilities of the decoupling element, and on the other a short life of the insulation layer, since this does not have the flexibility of the decoupling element and is heavily burdened by continuous oscillations of the exhaust system.
  • the materials used for insulation must absorb large strains due to their hollow cylindrical shape when the tube absorbs movement. This additionally limits the selection of materials, especially for heat-resistant materials, a strong.
  • this object is achieved with a decoupling element of the type mentioned above, which is characterized in that the heat insulation is formed by heat insulating material in the form of a helically wound band formed by individual convolutions segments, and that the segments overlap in the direction of the axis of the bellows ,
  • the thermal insulation is a physical object.
  • it is a material in the form of one or more layers of a solid - in contrast to gas - which is preferably elastic and / or flexible, in particular also compressible.
  • a heat-insulating material in the sense of the invention is characterized in that it is disposed between one another lying facing away from each other surfaces of the insulating material itself unfolds a heat-insulating effect by the physical substance located between the surfaces.
  • the heat insulating material is arranged outside the bellows along its shaft region in order to completely insulate the movable region of the decoupling element.
  • the segments are arranged annularly or helically in the form of overlapping scales around the metal bellows. It is preferably further provided that the segments is arranged around the shaft region of the bellows such that one ring segment is provided per corrugation, and / or that the pitch of a helical winding is matched to the distance between the wave crests.
  • the overlapping segments are each associated with a wave crest of the wave region and the number of segments corresponds to that of the wave crests, whereby the heat insulating material as a whole is movable in the same way as the bellows.
  • the mobility of the bellows is maintained at an effective isolation.
  • the formed from insulating the thermal insulation forming segments are exposed to only a comparatively small deformation itself.
  • the invention in a preferred embodiment provides that at least one segment is formed from a profile band or flat band. Particularly preferably, it is provided that the width of the segments is greater than the distance between two adjacent peaks of the bellows.
  • the invention further provides that the width of the segments is dimensioned such that an overlap region between the thickness of the iso lierstoffes amounts to half of the width of the segment itself.
  • the insulating effect can be influenced by varying the thickness as well as the width of the individual segments. By sufficient insulation, the temperature on the outside of the decoupling element can be lowered to below 300 ° C.
  • the insulating material preferably consists of flexible composite materials (metal textile), needled nonwovens, textured E glass, woven fibers of ceramic fibers, heat-resistant carrier fibers and strength-enhancing stainless steel wires and airgel nonwovens. Also, conventional insulating materials such as glass and / or rock wool, felts thereof and glass-based composite materials in which wire ⁇ reinforcements are incorporated, usable.
  • the insulating ⁇ substances may have a carrier and / or be provided to protect against aggressive media with an outer layer that is corrosion and / or temperature resistant. As a carrier, metal sheet, foil, yarn or mesh are possible. The insulating material may in this case be worked around the carrier material, for example, a mesh will be incorporated into the insulating material.
  • gluing also with heat-resistant ceramic adhesives, or even a positive fit, in which the carrier material is partially folded around the insulating material.
  • Material for a corrosive resistant protective layer is for example metal sheet or foil made of stainless steel or a ceramic coating of the insulating material.
  • ring segments are attached to the bellows as segments from the outside, and the latter is thus filled from the outside. is always flexibly isolated.
  • at least one undercut is provided ent ⁇ long the circumference of the ring segment, which engages in the troughs of the bellows. Ring segments with only slight or elastic undercuts can easily be slid over the bellows, the latter being the case with a self-elastic insulating material. It is preferably provided that a ring segment is associated with a wave crest of the wave range.
  • the invention particularly preferably provides that the ring segments are mounted without an undercut from an end face on the bellows, only after placement of the ring segments, the undercuts are inflected into the troughs, whereby a determination of the Ring segments on bellows is achieved.
  • the insulating material is intrinsically stable, that is plastically deformable and accordingly after elimination of the deformation (bending) causing forces, the resulting change in shape maintains.
  • the insulating material is wound helically around the bellows. For this purpose, the insulating material is again strip-shaped or band-shaped.
  • a winding then forms a segment of the heat insulating material or insulating material.
  • the width of the segment is greater than the pitch of the winding, so that an overlap of the subsequent windings is given.
  • a winding direction results from a winding of the strip-shaped insulating material coaxial with the longitudinal axis of the decoupling element starting from a front side to be selected.
  • the width of the segment is dimensioned such that an overlap region between see an expansion of the insulating material perpendicular to the longitudinal axis, ie, a thickness of the insulating material, up to half the width of the segment amounts. This prevents unwinding of the wound segment. A fixation of the winding happens by the fact that the slope of the winding is selected equal to the wave pitch of the bellows.
  • the heat insulation inside the bellows is arranged coaxially inside and / or outside of an agrafl hose arranged inside the bellows.
  • the Agraffschlauch is preferably helically wound or has a plurality of ring segments.
  • At least one flexible band of insulating material possibly on a support, in ring or helical shape is provided, wherein on the segments undercuts are provided which engage in the Agraffschlauch. It is preferably provided that these undercuts are already hooked when the Agraff tube is wound, ie that a simultaneous winding of Agraff and thermal insulation takes place.
  • a complete omission of undercuts is possible, wherein, for example, in case of helical winding of the segments whose outer diameter of the winding is set slightly larger than the inner diameter of the Agraff tube.
  • the winding can be reduced in diameter by torsion so that insertion within the Agraff tube is possible. If the torsion of the coil winding is reversed by release, the insulating material with radial prestress is applied to the Agraff hose.
  • This type of assembly is provided without the use of an Agraffschlauchs ⁇ see.
  • the winding is configured as in the previous embodiments.
  • a support which is preferably metallic, such as in the form of a film, a grid (similar to expanded metal) or fabric.
  • other materials for the carrier can be used, which provide a stabilization of the insulating material and are correspondingly flexible.
  • a profile band is provided with wire reinforcements or foil sheathing.
  • the invention provides that the at least one carrier has a width which is at least the width of the strip-shaped insulating material corresponds, in particular the carrier laterally oversteps the insulating material in the width, and that the insulating material laterally in the width superior range dese carrier against sei ⁇ ner bent the insulating material main portion and a from this main area at an angle not equal to 0 ° , preferably at 90 °, extending first leg forms as an undercut of the carrier.
  • the undercuts are in this case firmly connected to the carrier material, or bent out of this.
  • a helically formed thermal insulation that per winding at least one undercut engages, for example, in a trough of the bellows.
  • undercuts can not only be simply bent out as an angling, but also have an additional undercut which is formed parallel to the carrier opposite to the winding direction, so that the undercut as a whole has the form of a hook whose opening is directed against the winding direction, wherein at least a laterally arranged on a support carrying the insulating carrier arranged in turns of Agraffschlauchs engages.
  • the carrier material can thus be provided that at least one undercut is formed as a hook on the carrier material, in which a second leg of the carrier material from the one end of the first leg at an angle not equal to 0 °, preferably 90 °, under the first main region of the carrier at a distance to this extends.
  • the second leg is not wider than half the width of a segment, so that a quick and easy hooking is possible.
  • the attachment is made by step- have structure of the decoupling element, wherein the second leg preferably engages in turns of an Agraffschlauchs of the decoupling element.
  • undercuts are provided along the carrier or one into a plurality of projections, wherein the undercuts are formed at regular intervals along the carrier.
  • the width of the undercuts is hereby selectable.
  • the carrier is formed bent over its length in a region projecting beyond the width of the insulating material along at least one longitudinal edge, thus creating a continuous undercut.
  • the heat insulating material can be hooked into a fabric of an existing knitted tube, wherein the knitted tube consists of metal and extends over the entire corrugation of the bellows.
  • Such a knitted tube can either be prefabricated pulled over the bellows or be made by knitting the bellows and / or the planteisoliermaterials.
  • the undercuts engage in the radially outer and / or inner knitted fabric.
  • the heat-insulating material and / or the Agraffschlauch is surrounded by a knitted or braided hose.
  • segments having a carrier can be hooked into itself by means of appropriately arranged undercuts.
  • the carrier is configured S-shaped, wherein insulating material is introduced alter ⁇ nierend in the S-arms of the wearer.
  • several segments are applied in alternate ⁇ the geometry by the segments have Before ⁇ cracks preferably in the middle of the strip.
  • the projections are alternatingly directed ge ⁇ inwards and outwards and thus engage between adjacent segments in the sliding seat.
  • thermoforming material according to the invention which is formed by segments is that it does not have to be deformed or only slightly deformed for accommodating movements of the decoupling element as a result of the configuration according to the invention with the scale-like overlapping segments. Nevertheless, the insulation layer as a whole is highly flexible.
  • FIG. 1 shows a first embodiment of a decoupling element according to the invention in a partial longitudinal section with a heat insulating material of ring segments outside of the bellows.
  • FIG. 2 shows a second embodiment of a decoupling element according to the invention in a partial longitudinal section with a heat insulating material made of wound profiled strip outside the bellows;
  • Fig. 3, 4 an attachment of the heat insulating material according to the invention to a bellows of the decoupling element according to the invention; an attachment of the heat insulating material to a knit hose;
  • FIGS. 7 to 9 show an attachment of the heat-insulating material by means of undercuts of a carrier material
  • FIG. 10 shows a third embodiment of a decoupling element according to the invention in a partial longitudinal section with one around a Agraffschlauch wound thermal insulation material
  • Fig. 11 shows a fourth embodiment of a decoupling element according to the invention in a partial
  • the decoupling element 1 shows a first embodiment of a decoupling element 1 according to the invention in a partial longitudinal section.
  • the decoupling element 1 has a bellows 2 with a wave region 2.1 with wave troughs 2.2 and wave crests 2.3 as well as a connection region 2.4. Furthermore, the decoupling element 1 within the bellows 2 a
  • Agraffschlauch 3 (metal) or other metal hose on.
  • the Agraffschlauch 3 is continuously guided from the beginning to the end of the decoupling element 1 to the free end faces of the associated bellows 2, so that Agraffschlauch 3 and bellows 2 end face axially in one plane.
  • the Agraffschlauch 3 has on both sides a connection area 3.1.
  • the connection areas 2.4 of the bellows 2 and the connection area 3.1 of the Agraff hose 3 are connected to one another by a profile ring 4, preferably by welding.
  • the decoupling element 1 with the remaining components of an exhaust system (not shown) is connected.
  • the outer wall of the Baling 2 completely enclosing heat insulating material 5 is provided.
  • Fig. 1 shows a heat insulating material 5 with scale-like overlapping annular segments 6, engage on one side undercuts 7 along a wave crest 2.3 in a wave trough 2.2, so that the segments 6 have a cross section in the form of an angle.
  • the ring ⁇ segments 6 themselves consist in this embodiment of strip-like insulating material, which can be laid to a ring.
  • the undercuts 7 may be formed along the entire ring member 6, or only partially, wherein in the ring segment 6 then cuts are provided which allow a partial bending or buckling of the segment edges.
  • the undercuts 7 are bent along a descending side of a wave crest 2.3 of the bellows 2 in order to ensure a good fixation.
  • the length of such an undercut 7 is in the range of the width of a wave trough 2.2, whereby the ring segments 6 do not slip off the shaft portion 2.1 of the bellows 2.
  • the Ringseg ⁇ elements are successively drawable from one side of the decoupling element 1 on the bellows, wherein the undercuts 7 after placement of the ring segment 6 at the respective Balg Commission are einbiegbar.
  • the ring segments 6 have a certain width, which is dimensioned such that, when the undercut 7 is folded in, two adjacent ring segments 6 overlap.
  • the resulting overlap region A can be formed in different widths, as also shown in FIGS. 3 and 4.
  • the width or the axis-coaxial portion of the ring segment 6 is above the mean distance between two peaks 2.3 of the bellows.
  • 2 2 shows a second embodiment of a decoupling element according to the invention.
  • the heat insulating material 5 is formed as a continuous profiled strip 8 ⁇ , which is helically wound around the entire wave range 2.1 of the bellows 2 on the wave mountains 2.3 lying.
  • the profiled strip 8 completely encompasses the circumference of the corrugated region 2.1.
  • the individual windings describe helically wound segments which partially overlap in the axial direction.
  • a winding takes place in a winding direction (arrow B), which preferably extends parallel to the center axis of the decoupling element 1 along the entire length of the shaft region 2.1.
  • the profile band 8 is formed from a strip-shaped insulating material 9. To stabilize a carrier may be provided, as will be explained.
  • the profile band 8 has a width that is slightly greater than the distance between two peaks 2.3, which results in a narrow overlap area A.
  • FIG. 3 and 4 show a partial view of a decoupling element 1 according to the invention, wherein in Fig. 3, a first possible embodiment of a helical wrapping with profiled strip 8 is shown.
  • the profile band 8 rests on the wave crests 2.3.
  • 8 undercuts 7 are provided on the profile band. These are formed perpendicular to the winding direction B, and engage in the troughs 2.2.
  • the undercuts 7 may preferably be individual bends in the form of bent or bent legs, projections or hooks of the profile band 8 itself. This will be explained below.
  • FIG. 4 in contrast to FIG.
  • the profile band 8 is made wider, resulting in a larger overlap area A.
  • the overlapping area A is at least as wide as the extent of the profiled strip 8 perpendicular to the winding direction, ie the height of the profiled strip 8 itself.
  • the overlapping area A is approximately half of that Width of the profile band 8. A larger width improves lent addition to prevent Abwickeins the profile strip 8 from the bellows. 2
  • FIG. 1 Another fixation option is shown in FIG.
  • a fabric or knitted hose 11 is pulled.
  • the profile band 8 is constructed such that insulating material 9 is applied to a carrier material 10.
  • undercuts 7 are formed, but this time does not intervene in the wave range 2.1 of the bellows 2, but in the pulled over the bellows 2 knitted tube 11 or braided hose.
  • the undercuts 7 in this case engage radially from the outside into the mesh of the knitted tube 11.
  • Fig. 6 shows a variant of the embodiment of Fig. 5, wherein the knitted tube is not directly to the bellows 2 ge ⁇ sets, but is pulled onto a wound profile strip.
  • the profiled strip 8 is wound around the bellows 2 with the carrier 10 to the outside, wherein the undercuts 7 engage in the knitted tube 11 from the inside to the outside, whereby a good fastening is ensured.
  • the knitted tube 11 can be pulled over the bellows 2 as a whole. If are also shown in Fig.l to 5 with decoupling elements held ⁇ rem Agraff each Darge-presented embodiment is also applicable to elements without Agraff. This applies correspondingly to the embodiments of the following FIGS. 7 to 9.
  • FIGS. 7 to 9 show other variations of a possible fi xation ⁇ profile strips 8 and ring segments 6.
  • windings of the profile strip 8 are entangled in itself.
  • ⁇ undercuts to 7 at each both sides of the profile strip 8 as the cable stops which prevent loosening of the overlap.
  • the undercuts 7 are preferably formed on the carrier ⁇ layer 10.
  • the undercut 7 is hook-shaped on the carrier 10 in that a first leg 7.1 is connected to a second leg 7.2 which has an angle of 90 ° to the first leg 7.1.
  • the second leg 7.2 is arranged parallel to the main region of the carrier 10.
  • the carrier 10 is S-shaped as Agraff.
  • the insulating material 9 is provided in the form of two side by side, but offset tracks arranged. These can be arranged facing away from one another on the outer sides of the agraff carrier tape or facing one another on its inner sides (and thus encircled on three sides) or be completely enclosed by the carrier material.
  • FIG. 9 shows, in a partial section in the axial direction, successive ring segments 6 corresponding to FIG.
  • projections 13 are directed alternately inwards and outwards and thus engage between adjacent ring segments in the sliding seat. This arrangement is also possible for two profiled strips 8 to be wound, the projections 13 of one strip engaging between two adjacent turns of the other.
  • FIG. 10 and 11 show further embodiments of the decoupling element 1 according to the invention in a partial longitudinal section, wherein the heat insulating material 5 is not applied outside of the bellows 2, as in the previously described embodiments.
  • the heat insulating material 5 is rather disposed within the bellows 2.
  • the heat insulating material 5 in the form of a flat strip 14 (here only of insulating material) is helically wound around the outer wall of an inliner in the form of an Agraffschlauchs 3 shown only schematically.
  • the heat insulating material 5 can also be used as a flexible inner layer in ring form.
  • FIG. 11 shows a further embodiment of a decoupling element 1 according to the invention, wherein the insulation 5 is arranged within an agraffusion tube 3, which is also indicated only schematically.
  • the winding of the flat strip 14 takes place outside of the decoupling element 1. By twisting the coil winding this can be reduced in diameter, so that an insertion into the interior of the Agraffschlauchs 3 is possible.
  • the outside of the helical winding of the insulation 5 thus adjoins the inner wall of the Agraffschlauchs 3.
  • the torsion of the winding is reversible feasible, whereby the heat insulating material 5 rests with a radial bias on the inside of the Agraff hose 3.
  • FIG. 12 a possible fixation of the heat insulating material 5 on Agraffschlauch 3 is shown. Furthermore, a longitudinal section through a region of an Agraff tube 3 is shown, whose windings 3.2 have an S-shaped contour in section. Insulating material 9 is in turn applied to a carrier 10, the carrier 10 being widened beyond the width of the insulating material 9. This broadening to the outside is in the form of an undercut angling with a first leg 15 is formed. The first leg 15 of the carrier 10 engages in the S-shaped contour of the windings 3.2.
  • FIG. 12 represents a simple angling. Variants with or without a further undercut are possible.
  • the bend with a first leg 15 of FIG. 13 has a further undercut in the form of a second leg 16, which engages the contour of the turns 3.2 of the Agraffschlauchs 3 in the interstices of the turns 3.2.
  • a secure attachment of the profile strip 8 is ensured.
  • the erection of the heat insulating material 5 takes place parallel to the winding of the Agraffschlauchs 3rd
  • FIG. 10 Further embodiments of the present invention also include for the embodiments shown in Fig. 10 and Fig. 11 additional fixations by knitted fabrics, wherein a knitted tube can be pulled around the winding of the heat insulating material 5.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)
  • Thermal Insulation (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

L'invention concerne un élément de découplage, notamment pour des systèmes d'échappement de moteurs à combustion interne de véhicules automobiles, comprenant un soufflet et un matériau thermo-isolant. Selon l'invention, ce matériau thermo-isolant est formé par des segments annulaires ou par une bande enroulée de manière hélicoïdale comportant des segments formés par des enroulements individuels. Toujours selon l'invention, les segments se chevauchent en direction de l'axe du soufflet.
PCT/EP2012/000434 2011-02-04 2012-02-01 Élément de découplage, notamment pour systèmes d'échappement Ceased WO2012104069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011010332.5 2011-02-04
DE201110010332 DE102011010332B4 (de) 2011-02-04 2011-02-04 Entkopplungselement für Abgasanlagen

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Publication Number Publication Date
WO2012104069A1 true WO2012104069A1 (fr) 2012-08-09

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WO (1) WO2012104069A1 (fr)

Cited By (1)

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CN107588273A (zh) * 2016-07-10 2018-01-16 江苏南波机械制造有限公司 直埋式万向环扣保护管

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Publication number Priority date Publication date Assignee Title
EP3002493B1 (fr) * 2014-09-30 2017-08-16 Flexider Automotive Italy S.r.l. Dispositif de couplage isolé thermiquement pour tuyaux d'échappement de moteurs endothermiques

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