FR2480399A1 - Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced - Google Patents

Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced Download PDF

Info

Publication number
FR2480399A1
FR2480399A1 FR8008377A FR8008377A FR2480399A1 FR 2480399 A1 FR2480399 A1 FR 2480399A1 FR 8008377 A FR8008377 A FR 8008377A FR 8008377 A FR8008377 A FR 8008377A FR 2480399 A1 FR2480399 A1 FR 2480399A1
Authority
FR
France
Prior art keywords
undulation
wall thickness
flexible joint
exhaust pipe
motor vehicle
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
FR8008377A
Other languages
French (fr)
Other versions
FR2480399B1 (en
Inventor
Bernard Bertrand
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.)
Automobiles Peugeot SA
Original Assignee
Automobiles Peugeot SA
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 Automobiles Peugeot SA filed Critical Automobiles Peugeot SA
Priority to FR8008377A priority Critical patent/FR2480399A1/en
Publication of FR2480399A1 publication Critical patent/FR2480399A1/en
Application granted granted Critical
Publication of FR2480399B1 publication Critical patent/FR2480399B1/fr
Granted 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 ; 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
    • 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
    • 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 bellows or an expansible folded or corrugated tube
    • F16L51/022—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with a single corrugation

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)
  • Joints Allowing Movement (AREA)

Abstract

The flexible sleeve (1) is used to make an end to end connection of co-axial lengths (5,6) of exhaust pipe, housing onto the two ends to be secured by welding (7). It (1) may be of stainless steel, having a single circumferential undulation (4) at mid length, and accommodating the minimum practicable gap (8) between pipe ends. The undulation (4) is external and the sleeve wall thickness reduces progressively towards the peak (P). The ratio of minimum to maximum wall thickness is between one half and one quarter and the sleeve steel may be of weldable grades (e.g. Z 10 CN 10 - 09).

Description

La présente invention se rapporte à un joint souple destiné au raccordement étanche de deux éléments d'un tuyau, notamment d'un tuyau d'échappement sur un véhicule automobile. The present invention relates to a flexible seal intended for the sealed connection of two elements of a pipe, in particular an exhaust pipe on a motor vehicle.

Sur un véhicule automobile à moteur thermique placé à l'avant, la ligne d'échappement, qui fait presque toute la longueur du véhicule, contribue pour une bonne part, du fait des vibrations auxquelles elle est soumise, à créer une certaine sensation d'inconfort pour les passagers, principalement lorsque le moteur tourne au ralenti. On a motor vehicle with a combustion engine placed at the front, the exhaust line, which is almost the entire length of the vehicle, contributes to a large extent, due to the vibrations to which it is subjected, to create a certain feeling of discomfort for passengers, mainly when the engine is idling.

Ces vibrations créent en outre des contraintes de fatigue d'autant plus importantes, sur la ligne d'échappement, que le moteur est porté par des supports plus souples. These vibrations also create fatigue stresses which are all the greater, on the exhaust line, as the engine is carried by more flexible supports.

Il est donc nécessaire d'interposer un élément souple dans la ligne d'échappement, entre un tronçon relié au moteur et le tronçon principal situé en aval. It is therefore necessary to interpose a flexible element in the exhaust line, between a section connected to the engine and the main section located downstream.

On a déjà proposé, pour cela, d'utiliser un tron çon flexible constitué par une paroi métallique à ondulations parallèles formant une sorte de soufflet. Malheureusement,- ces flexibles sont soumis à des déformations complexes, ainsi qu'à des températures élevées ce qui entraîne leur destruction rapide, à moins de recourir à des réalisations tres élaborées, donc très coûteuses. For this, it has already been proposed to use a flexible section consisting of a metal wall with parallel undulations forming a sort of bellows. Unfortunately, these hoses are subjected to complex deformations, as well as to high temperatures, which leads to their rapid destruction, unless resorting to very elaborate embodiments, therefore very costly.

C'est pourquoi, dans la pratique, on utilise plutôt des joints formés par deux éléments complémentaires de rotule serrés par des moyens élastiques. Mais ces joints sont souvent bruyants et sujets au blocage. De plus, il est difficile de les rendre étanches et surtout de les maintenir étanches, ce qui peut entraîner des rentrées d'air qui faussent les indications des détecteurs d'oxygène que l'on place, dans certains cas, dans des conduits d'échappement pour régler la richesse du mélange introduit dans le moteur. This is why, in practice, rather use is made of seals formed by two complementary elements of ball joint tightened by elastic means. But these joints are often noisy and prone to blockage. In addition, it is difficult to make them waterproof and above all to keep them waterproof, which can cause re-entry of air which distorts the indications of the oxygen detectors which are placed, in certain cases, in ducts. exhaust to adjust the richness of the mixture introduced into the engine.

L'invention a pour but de fournir une solution particulièrement simple et bon marché pour réaliser une jonction souple entre deux éléments d'un tuyau, cette jonction étant parfaitement étanche et ne comportant pas de surfaces frottantes, ce qui garantit l'absence de bruit et l'impossibilité de blocage. The object of the invention is to provide a particularly simple and inexpensive solution for producing a flexible junction between two elements of a pipe, this junction being perfectly sealed and having no friction surfaces, which guarantees the absence of noise and the impossibility of blocking.

Le joint souple selon l'invention, destiné à relier deux tronçons de tuyau, est constitué par deux manchons cylindriques reliés par un bourrelet de révolution, chaque manchon étant monté et soudé sur l'un des -tronçons. The flexible joint according to the invention, intended to connect two sections of pipe, consists of two cylindrical sleeves connected by a bead of revolution, each sleeve being mounted and welded on one of the sections.

Ce joint est caractérisé en ce que le bourrelet a une épaisseur décroissant progressivement à partir de chacun des manchons vers la zone de plus grand diamètre, l'écartement entre les deux tronçons de tuyau étant limité au minimum compatible avec les débattements prévus pendant l'utilisation.This joint is characterized in that the bead has a thickness which decreases progressively from each of the sleeves towards the zone of larger diameter, the spacing between the two sections of pipe being limited to the minimum compatible with the deflections provided during use. .

Un exemple de réalisation de l'invention fait l'objet de la description qui suit, en référence à la Fig. An exemplary embodiment of the invention is the subject of the description which follows, with reference to FIG.

unique jointe qui représente une coupe axiale à travers un joint suivant l'invention.single joint which represents an axial section through a joint according to the invention.

Ce joint 1 est formé de deux manchons cylindriques 2,3 coaxiaux, reliés par un bourrelet 4. Les manchons ont une épaisseur constante, tandis que le bourrelet a une épaisseur qui décroit progressivement à partir de chacun des manchons vers la zone de plus grand diamètre. Le rapport entre l'épaisseur minimale et l'épaisseur maximale peut être compris entre 1/2 et 1/4. This seal 1 is formed by two cylindrical sleeves 2,3 coaxial, connected by a bead 4. The sleeves have a constant thickness, while the bead has a thickness which decreases progressively from each of the sleeves towards the zone of larger diameter . The ratio between the minimum thickness and the maximum thickness can be between 1/2 and 1/4.

Chaque manchon est emmanché sur l'extrémité d'un tronçon de tuyauterie 5,6 et solidarisé par une soudure 7. Each sleeve is fitted onto the end of a section of piping 5, 6 and secured by a weld 7.

Le jeu 8 entre les extrémités des tronçons 5,6 est limité au minimum compatible avec les débattements angulaires et longitudinaux prévus pendant l'utilisation. The clearance 8 between the ends of the sections 5.6 is limited to the minimum compatible with the angular and longitudinal deflections provided during use.

Le joint 1 est réalisé, par exemple, en acier inoxydable soudable tel que l'acier Z 10 CN 18-09 (NF A 35572). The seal 1 is made, for example, of weldable stainless steel such as steel Z 10 CN 18-09 (NF A 35572).

Un joint ainsi réalisé répond bien au but que l'on s'était fixé : il est totalement étanche, il ne comporte aucune surface frottante donc il n'est pas bruyant et ne risque pas de se bloquer. Enfin, il possede une bonne souplesse, due a l'amincissement de son épaisseur. Comme la zone où se situe cet amincissement est la plus éloignée des tronçons de tuyaux, et en dehors du courant des gaz, elle subit une élevation de température relativement modérée, ce qui confère au joint une bonne tenue dans le temps.  A joint thus produced responds well to the goal that we had set: it is completely waterproof, it has no rubbing surface so it is not noisy and does not risk being blocked. Finally, it has good flexibility, due to the thinning of its thickness. As the area where this thinning is located is the furthest from the pipe sections, and apart from the flow of gases, it undergoes a relatively moderate temperature rise, which gives the joint good resistance over time.

Claims (3)

REVENDICATIONS 1. Joint souple, destiné à relier deux tronçons de tuyau, constitué de deux manchons cylindriques reliés par un bourrelet de révolution, chaque manchon étant monté et soudé sur l'un des tronçons, joint caractérisé en ce que le bourrelet (4) a une épaisseur décroissant progressivement à partir de chacun des manchons (2,3) vers la zone de plus grand diamètre, l'écartement entre les deux tronçons de tuyau (5,6) étant limité au minimum compatible avec les débattements prévus pendant l'utilisation. 1. Flexible joint, intended to connect two sections of pipe, consisting of two cylindrical sleeves connected by a bead of revolution, each sleeve being mounted and welded on one of the sections, joint characterized in that the bead (4) has a thickness gradually decreasing from each of the sleeves (2,3) towards the area of larger diameter, the spacing between the two sections of pipe (5,6) being limited to the minimum compatible with the travel provided during use. 2. Joint souple suivant la revendication 1, caractérisé en ce que le rapport entre l'épaisseur minimale et l'épaisseur maximale dudit bourrelet (4) est comprise entre 1/2 et 1/4. 2. Flexible joint according to claim 1, characterized in that the ratio between the minimum thickness and the maximum thickness of said bead (4) is between 1/2 and 1/4. 3. Joint souple suivant l'une quelconque des revendications 1 et 2, caractérisé en ce qu'il est réalise en un acier inoxydable soudable, tel que l'acier Z 10 3. Flexible joint according to any one of claims 1 and 2, characterized in that it is made of a weldable stainless steel, such as steel Z 10 CN 10-09. CN 10-09.
FR8008377A 1980-04-15 1980-04-15 Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced Granted FR2480399A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8008377A FR2480399A1 (en) 1980-04-15 1980-04-15 Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8008377A FR2480399A1 (en) 1980-04-15 1980-04-15 Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced

Publications (2)

Publication Number Publication Date
FR2480399A1 true FR2480399A1 (en) 1981-10-16
FR2480399B1 FR2480399B1 (en) 1985-03-22

Family

ID=9240872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8008377A Granted FR2480399A1 (en) 1980-04-15 1980-04-15 Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced

Country Status (1)

Country Link
FR (1) FR2480399A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588916A1 (en) * 1985-10-18 1987-04-24 Renault Flexible coupling device for exhaust pipes at high temperatures

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191406094A (en) * 1914-03-10 1914-05-21 Bruno Wagner Improvements in Expansion Joints for Piping.
GB289599A (en) * 1927-03-04 1928-05-03 Thomas Rose Improvements in or relating to expansion joints for piping
US3139115A (en) * 1963-03-18 1964-06-30 Dore Co John L Lined vacuum bellows
DE2055898A1 (en) * 1970-11-13 1972-05-25 Berghoefer H Pipe connector
FR2301760A1 (en) * 1975-02-19 1976-09-17 Ouest Cie Extending and contracting hose - has integral telescopic section formed from annular pleat in thin portion of hose
GB2032032A (en) * 1978-08-24 1980-04-30 Bridgestone Tire Co Ltd Flexible coupling pipe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191406094A (en) * 1914-03-10 1914-05-21 Bruno Wagner Improvements in Expansion Joints for Piping.
GB289599A (en) * 1927-03-04 1928-05-03 Thomas Rose Improvements in or relating to expansion joints for piping
US3139115A (en) * 1963-03-18 1964-06-30 Dore Co John L Lined vacuum bellows
DE2055898A1 (en) * 1970-11-13 1972-05-25 Berghoefer H Pipe connector
FR2301760A1 (en) * 1975-02-19 1976-09-17 Ouest Cie Extending and contracting hose - has integral telescopic section formed from annular pleat in thin portion of hose
GB2032032A (en) * 1978-08-24 1980-04-30 Bridgestone Tire Co Ltd Flexible coupling pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588916A1 (en) * 1985-10-18 1987-04-24 Renault Flexible coupling device for exhaust pipes at high temperatures

Also Published As

Publication number Publication date
FR2480399B1 (en) 1985-03-22

Similar Documents

Publication Publication Date Title
FR2788580A1 (en) CONNECTION FOR TUBES
FR2749639A1 (en) QUICK CONNECTION DEVICE FOR PRESSURE FLUID CONDUIT
EP0432013A1 (en) Pipe connector fitted with a leak draining device
FR2738893A1 (en) METHOD OF MAKING A BIT, TIP AND CONNECTOR PRODUCED BY THIS METHOD AND CIRCUIT COMPRISING SUCH A CONNECTOR
EP0689005B1 (en) Arrangement for fastening to a wall a continuous conduit leading into a box
FR2796416A1 (en) IMPROVEMENT TO A DECOUPLING HOSE MOUNTED IN AN EXHAUST LINE OF A MOTOR VEHICLE ENGINE
FR2480399A1 (en) Flexible joint for motor vehicle exhaust pipe - has welded sleeve with single circumferential barrel undulation in which wall thickness is reduced
FR2657413A1 (en) Tube-end connection, with tightening sleeve
EP0148813A2 (en) Gasket
EP0074285B1 (en) Rotary seal for the exhaust pipe of an automotive vehicle
WO2014102029A1 (en) Motor vehicle exhaust line comprising an improved ball-and-socket joint
FR2504645A1 (en) ASSEMBLY OF A TUBE WITH A CONNECTING ELEMENT, PARTICULARLY FOR AN EXHAUST PIPE OF AN INTERNAL COMBUSTION ENGINE
FR2726884A1 (en) System for fitting noise attenuator in vehicle hydraulic power steering circuit
WO2002008677A1 (en) Expansion device for refrigerant fluid and conditioning circuit comprising same
FR2508592A3 (en) SCREW ASSEMBLY FOR TUBES
KR200184226Y1 (en) Connecting apparatus of pipe body
FR2849151A1 (en) Connection for connecting pipes in aircraft fuel circuit comprises cylindrical collars at end of each pipe connected by sleeve on which nut is screwed, groove in collar external surface housing sealing joint
FR2839135A1 (en) Flexible connection between sections of car exhaust comprises bellows which is held in place by internal and external collars
FR2656404A2 (en) Quick connector device and apparatus for implementing it
EP0679827B1 (en) Coupling device for a hydraulic circuit under high pressure
FR2694600A1 (en) Silencer construction for IC engine of motor vehicle - comprises central gas-carrying conduit, surrounded by cylindrical casing and end plates, casing being slidable over sealing joint members
FR2765303A1 (en) DEVICE FOR SEALED CONNECTION OF A TUBE OR PIPE TO A TUBULAR END PIECE
WO2002004854A1 (en) Conduit with corrugated end
FR2546601A1 (en) Corrugated flexible metal pipe
BE898668A (en) High temperature fire resistant seal - has metallic sealing ring around flexible gasket

Legal Events

Date Code Title Description
ST Notification of lapse