FR2467976A1 - Connecting arrangement for exhaust pipes - has deformable bead around rim of conical pipe end with deformable clamp points around flange opening - Google Patents

Connecting arrangement for exhaust pipes - has deformable bead around rim of conical pipe end with deformable clamp points around flange opening Download PDF

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Publication number
FR2467976A1
FR2467976A1 FR7925643A FR7925643A FR2467976A1 FR 2467976 A1 FR2467976 A1 FR 2467976A1 FR 7925643 A FR7925643 A FR 7925643A FR 7925643 A FR7925643 A FR 7925643A FR 2467976 A1 FR2467976 A1 FR 2467976A1
Authority
FR
France
Prior art keywords
flange
deformable
pipe end
pipes
exhaust pipes
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
Application number
FR7925643A
Other languages
French (fr)
Other versions
FR2467976B1 (en
Inventor
Andre Chalesle
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR7925643A priority Critical patent/FR2467976A1/en
Priority to DE19808027020 priority patent/DE8027020U1/en
Priority to DE19803038181 priority patent/DE3038181A1/en
Publication of FR2467976A1 publication Critical patent/FR2467976A1/en
Application granted granted Critical
Publication of FR2467976B1 publication Critical patent/FR2467976B1/fr
Granted 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
    • F01N13/18—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
    • 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
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes

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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)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

The connecting arrangement for exhaust pipes, partic. to exhaust manifolds, uses a flange with a conical aperture, into which the similarly-shaped pipe end fits. Round the rim of the conical pipe end (7) is a bead (8) which is deformed when it is pressed into the flange (3). The cone of the pipe end preferably has an angle of 20 to 26 deg. There are also deformable clamps spaced around the periphery of the flange aperture (10). The flange thickness is pref. about 12 mm. To connect pipes so fitted, the flange free faces are brought together and clamped by bolts.

Description

ASSEMBLAGE DE TUYAUX D'ECHAPPEMENT, NOTAMMENT A UN COLLECTEUR
La présente invention, due à la collaboration de Monsieur André
CHALESLE, se rapporte à la fixation de tuyaux de descente d'échappement, en particulier du type bi-tubes, fixés sur le collecteur par l'intermédiaire d'une bride.ASSEMBLY OF EXHAUST PIPES, PARTICULARLY TO A MANIFOLD
The present invention, due to the collaboration of Monsieur André
CHALESLE, relates to the fixing of exhaust downpipes, in particular of the twin-tube type, fixed to the manifold by means of a flange.

Selon la technique antérieure, de tels tuyaux étaient soudés directement à la bride, cette dernière étant alors boulonnée sur le collecteur.According to the prior art, such pipes were welded directly to the flange, the latter then being bolted to the manifold.

Un tel assemblage rigide a pour principal inconvénient de ne pas filtrer les vibrations mécaniques dues aux pièces en mouvement dans le moteur ; selon sa géométrie et sa masse, il pourra posséder des fréquences propres de vibration dangereuses pour sa longévité.The main drawback of such a rigid assembly is that it does not filter out mechanical vibrations due to moving parts in the engine; according to its geometry and its mass, it can have natural frequencies of vibration dangerous for its longevity.

On est ainsi parfois amené à renforcer l'assemblage de la bride et des tuyaux, ce qui est souvent onéreux et pas toujours efficace
En effet la soudure de nervures de renforts recuit et fragilise les tubes, et dégrade de ce fait ses qualités mécaniques.It is thus sometimes necessary to reinforce the assembly of the flange and the pipes, which is often expensive and not always effective.
Indeed the welding of reinforcing ribs anneals and weakens the tubes, and thereby degrades its mechanical qualities.

L'objet de l'invention est de supprimer la soudure entre la bride et les tuyaux, et de la remplacer par un emmanchement particulier de ces deux éléments.The object of the invention is to eliminate the weld between the flange and the pipes, and to replace it by a particular fitting of these two elements.

L'invention sera déerite au regard des figures i à 6, ci-jointes données à titre d'exemples non limitatifs, qui représentent respectivement - figure i et 2 : deux exemples d'assemblages soudés et renforcés selon la technique antérieure, vus en coupe.The invention will be described with reference to Figures i to 6, attached given by way of nonlimiting examples, which respectively represent - Figure i and 2: two examples of welded and reinforced assemblies according to the prior art, seen in section .

- figure 3 : une vue en perspective de l'assemblage selon I'invention - figure 4 : une vue en coupe dudit assemblage en cours.- Figure 3: a perspective view of the assembly according to the invention - Figure 4: a sectional view of said assembly in progress.

- figure 5 : une vue en coupe de la phase de sertissage.- Figure 5: a sectional view of the crimping phase.

- figure 6 : une variante de l'application de l'invention à l'assem- blage de deux tuyaux.- Figure 6: a variant of the application of the invention to the assembly of two pipes.

Considérons les figures 1 et 2. Selon ces montages classiques, on voit que les tuyaux 1 et 2 sont réunis à une bride 3 au moyen des soudures 4. Pour les raisons évoquées plus haut, on renforce l'assem- blage précédent au moyen de soudures simples supplémentaires 5 ou de nervures 6 en équerre soudées à la fois aux tuyaux et à la bride 3. C'est au cours de ces opérations de soudage que le métal voisin des soudures est chauffé, recuit et se fragilise. Consider Figures 1 and 2. According to these conventional arrangements, we see that the pipes 1 and 2 are joined to a flange 3 by means of the welds 4. For the reasons mentioned above, the preceding assembly is reinforced by means of additional single welds 5 or 6 angled ribs welded to both the pipes and the flange 3. It is during these welding operations that the metal adjacent to the welds is heated, annealed and becomes brittle.

Le montage selon l'invention, visible en particulier aux figures 3 et 4 ne comporte pas de soudure et ne présente par conséquent pas les inconvénients précédents.The assembly according to the invention, visible in particular in Figures 3 and 4 does not include welding and therefore does not have the above drawbacks.

De plus, il ne prend pas non plus de jeu lors de la dilatation des pièces à la température maximum de fonctionnement du moteur, conserve à chaud comme à froid une bonne tenue mécanique et une étanchéité correcte aux gaz d'échappement, entre le tube et la bride.In addition, it also takes no play when expanding the parts to the maximum operating temperature of the engine, keeps hot as cold good mechanical strength and a correct seal against exhaust gases, between the tube and the flange.

On obtient un tel résultat en conformant l'extrémité des tuyaux proche de la bride 3 en forme de tronc de cône mâle 7, tandis que
l'est la partie correspondante des ouvertures 9 de la bride 3 en tronc de cône femelle 10.Such a result is obtained by shaping the end of the pipes close to the flange 3 in the form of a male truncated cone 7, while
is the corresponding part of the openings 9 of the flange 3 in a female truncated cone 10.

La partie supérieure du tronc de cône mâle 7 des tuyaux est pourvue d'une ceinture 8 qui permet le coincement de ces derniers dans la bride, lors de ltemmanchement à force que l'on exerce pour solidariser cet ensemble à la presse.The upper part of the male truncated cone 7 of the pipes is provided with a belt 8 which allows the latter to be trapped in the flange, during the force fitting which is exerted to secure this assembly to the press.

L'assemblage précédent est de préférence maintenu par des sertissages ponctuels déformants Il réalisés sur la bride 3, comme cela est mieux visible à la figure 5, lors du passage à la presse.The previous assembly is preferably maintained by deforming punctual crimps 11 made on the flange 3, as is better visible in FIG. 5, when passing through the press.

A titre d'exemple, on obtient de très bons résultats à chaud comme à froid en utilisant une bride 3 de hauteur voisine de 12 mm, dont l'angle au sommet des troncs de cône mâle et femelle est compris entre 20 et 26 degrés et pourvu de trois sertissages déformants répartis également à la périphérie du grand diamètre du tronc de cône femelle 10 de la bride. Celle-ci comporte en outre un orifice 22 permettant de la fixer par exemple par boulonnage, au collecteur d'échappement.By way of example, very good results are obtained hot and cold by using a flange 3 of a height close to 12 mm, the angle at the top of the male and female cone trunks being between 20 and 26 degrees and provided with three deforming crimps distributed equally on the periphery of the large diameter of the female truncated cone 10 of the flange. It further comprises an orifice 22 allowing it to be fixed, for example by bolting, to the exhaust manifold.

Un tel assemblage, bien que suffisamment étanches aux gaz d'échappement, laisse la souplesse nécessaire à la liaison des tuyaux à la bride, car les tuyaux n'ayant pas été soumis à la chaleur de soudures éventuelles, conservent toute leur élasticité d'origine.Such an assembly, although sufficiently leaktight to exhaust gases, leaves the flexibility necessary for connecting the pipes to the flange, since the pipes which have not been subjected to the heat of any welds, retain all their original elasticity .

Une grande partie des vibrations mécaniques issues du moteur sont ainsi filtrées
Par ailleurs, le prix de revient de l'assemblage selon l'invention est faible, ce qui permet son utilisation à d'autres endroits que ce qui a été mentionné plus haut, par exemple sur une descente d'échappement monotube ou sur le parcours du tube d'échappement, comme illustré à la figure 6. A large part of the mechanical vibrations from the engine are thus filtered
Furthermore, the cost price of the assembly according to the invention is low, which allows it to be used in places other than what was mentioned above, for example on a single tube exhaust descent or on the route. of the exhaust pipe, as shown in Figure 6.

Dans ce dernier cas, chaque tuyau 20 - 21 est solidarisé à une bride 22 - 23 de la manière décrite antérieurement, à savoir en faisant coopérer les éléments tronc côniques mâles 27 - 28 des tuyaux et femelles 29 - 30 des brides et en procédant aux sertissages 25 - 26.In the latter case, each pipe 20 - 21 is secured to a flange 22 - 23 in the manner described above, namely by making the male conical trunk elements 27 - 28 of the pipes and female 29 - 30 of the flanges cooperate and by proceeding with the crimps 25 - 26.

Les éléments ainsi obtenus sont alors réunis en mettant en contact les faces libres des brides qui sont alors boulonnées en 24. The elements thus obtained are then brought together by bringing the free faces of the flanges into contact which are then bolted at 24.

Claims (2)

REVENDICATIONS 1- Assemblage de tuyaux d'échappement, notamment à un collecteur, caractérisé par le fait que l'on conforme une extrémité des tuyaux à assembler en forme de tronc de-cône mâle, dont le grand diamètre comporte une ceinture, que cette extrémité coopère avec un orifice en forme de tronc de cône femelle ménagé dans une bride, dans lequel il est introduit à force jusqu'à déformation de la ceinture, que l'on provoque au cours de ltopération précédente un sertissage ponctuel des tuyaux par déformation des zônes voisines de la bride, l'ensemble ainsi obtenu étant ensuite solidarisé, par exemple au moyen d'un boulonnage de la bride, sur le collecteur d'échappement.1- Assembly of exhaust pipes, in particular to a manifold, characterized in that one conforms one end of the pipes to be assembled in the form of a male truncated cone, the large diameter of which comprises a belt, that this end cooperates with an orifice in the form of a female truncated cone formed in a flange, into which it is force-fitted until the belt is deformed, which is caused during the previous operation a punctual crimping of the pipes by deformation of the neighboring zones of the flange, the assembly thus obtained is then secured, for example by means of bolting of the flange, on the exhaust manifold. 2- Assemblage de tuyaux d'échappement selon la revendication 1, caractérisé en ce que deux sous-ensembles constitués par au moins un tuyau solidarisé à une bride sont réunis entre eux par exemple par boulonnage des deux brides dont les faces libres sont mises en contact.  2- assembly of exhaust pipes according to claim 1, characterized in that two sub-assemblies consisting of at least one pipe secured to a flange are joined together for example by bolting the two flanges whose free faces are brought into contact .
FR7925643A 1979-10-16 1979-10-16 Connecting arrangement for exhaust pipes - has deformable bead around rim of conical pipe end with deformable clamp points around flange opening Granted FR2467976A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7925643A FR2467976A1 (en) 1979-10-16 1979-10-16 Connecting arrangement for exhaust pipes - has deformable bead around rim of conical pipe end with deformable clamp points around flange opening
DE19808027020 DE8027020U1 (en) 1979-10-16 1980-10-09 PIPE CONNECTORS, IN PARTICULAR TO CONNECT EXHAUST PIPES
DE19803038181 DE3038181A1 (en) 1979-10-16 1980-10-09 ARRANGEMENT FOR CONNECTING EXHAUST PIPES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7925643A FR2467976A1 (en) 1979-10-16 1979-10-16 Connecting arrangement for exhaust pipes - has deformable bead around rim of conical pipe end with deformable clamp points around flange opening

Publications (2)

Publication Number Publication Date
FR2467976A1 true FR2467976A1 (en) 1981-04-30
FR2467976B1 FR2467976B1 (en) 1984-02-03

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FR7925643A Granted FR2467976A1 (en) 1979-10-16 1979-10-16 Connecting arrangement for exhaust pipes - has deformable bead around rim of conical pipe end with deformable clamp points around flange opening

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DE (2) DE8027020U1 (en)
FR (1) FR2467976A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585823A1 (en) * 1992-08-30 1994-03-09 Toshiomi Hayashi Pipe with flange for pipe fitting, pipe flange used therewith and method of joining said pipe to flange

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA137288A (en) * 1988-05-25 1997-12-15 Roth Technik Austria COMPONENT, ESPECIALLY EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINES, AND METHOD FOR THE PRODUCTION THEREOF
DE10021809C1 (en) * 2000-05-04 2001-11-15 Daimler Chrysler Ag Joining system, for pipe in flanged connector, comprises welding to produce bead between end of connector and outer wall of pipe, recess behind bead being filled with second material to increase impact strength of joint

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE484005C (en) * 1924-08-24 1929-10-09 Borsig G M B H Maschinenfabrik Flanged pipe with rolled flange
US3798903A (en) * 1972-12-29 1974-03-26 Gen Motors Corp Exhaust reactor manifold
GB1350199A (en) * 1970-11-10 1974-04-18 Laity T Engine exhaust pipe joints
US3912306A (en) * 1974-07-22 1975-10-14 Tenneco Inc Pipe flange

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE484005C (en) * 1924-08-24 1929-10-09 Borsig G M B H Maschinenfabrik Flanged pipe with rolled flange
GB1350199A (en) * 1970-11-10 1974-04-18 Laity T Engine exhaust pipe joints
US3798903A (en) * 1972-12-29 1974-03-26 Gen Motors Corp Exhaust reactor manifold
US3912306A (en) * 1974-07-22 1975-10-14 Tenneco Inc Pipe flange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585823A1 (en) * 1992-08-30 1994-03-09 Toshiomi Hayashi Pipe with flange for pipe fitting, pipe flange used therewith and method of joining said pipe to flange
US5415443A (en) * 1992-08-30 1995-05-16 Hayashi; Toshiomi Pipe with flange for pipe fitting, pipe flange used therewith and method of joining said pipe with flange with pipe

Also Published As

Publication number Publication date
FR2467976B1 (en) 1984-02-03
DE3038181A1 (en) 1981-04-30
DE8027020U1 (en) 1983-03-03

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