FR2459924A2 - Watertight rotating shaft seal - has two L-shaped cross=section rings with elastomeric packing and lip seals for reduced friction - Google Patents

Watertight rotating shaft seal - has two L-shaped cross=section rings with elastomeric packing and lip seals for reduced friction Download PDF

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Publication number
FR2459924A2
FR2459924A2 FR7916556A FR7916556A FR2459924A2 FR 2459924 A2 FR2459924 A2 FR 2459924A2 FR 7916556 A FR7916556 A FR 7916556A FR 7916556 A FR7916556 A FR 7916556A FR 2459924 A2 FR2459924 A2 FR 2459924A2
Authority
FR
France
Prior art keywords
friction
rings
packing
axial
lining
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.)
Pending
Application number
FR7916556A
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French (fr)
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.)
Chromex SA
Original Assignee
Chromex 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 Chromex SA filed Critical Chromex SA
Priority to FR7916556A priority Critical patent/FR2459924A2/en
Publication of FR2459924A2 publication Critical patent/FR2459924A2/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

The rotating seal consists of two outer metal rings (1,2) with L-shaped cross-sections, which when assembled form an annulus which houses the flexible elastomeric packing (3d). The packing is formed with contact lips which ensure a minimal area of contact with the rotating inner ring (2) at the contact points (5) and thus a minimal coefficient of friction. The contact pressure exerted by the rings on the packing is maintained at a predetermined level by a spring (24). The packing is held by the outer ring (1) and which is itself retained by the retention part (6) of the inner ring (2).

Description

Le brevet principal se rapporte à un joint tournant entre pinces coaxiales, comprenant une armature métallique de montage constituée à l'aide de deux anneaux de section générale en L disposes tdte-bêche pour former un logement renfermant une garniture de friction et étanchéité et destinés d être respectivement montés par emmanchement avec la pièce coaxiale correspondante, dans lequel l'un desdits anneaux en L pressente un rebord de retenue axiale de l'autre formé après montage entre eux de la garniture, de sorte que le joint constitue un ensemble monobloc résistant à toute manutention de transport ou montage et conservant cependant toute faculté désirable d'absorption des défauts d'alignement ou de concentricité desdites pièces coaxiales. The main patent relates to a rotary joint between coaxial clamps, comprising a metal mounting frame constituted by means of two rings of general L-shaped section arranged tdte-spade to form a housing containing a friction lining and sealing and intended for be respectively fitted by fitting with the corresponding coaxial part, in which one of said L-shaped rings presses an axial retaining rim of the other formed after mounting of the gasket between them, so that the seal constitutes a one-piece assembly resistant to any handling of transport or assembly and preserving however any desirable faculty of absorption of the defects of alignment or concentricity of said coaxial parts.

Le présent certificat d'addition a pour objet des dispositions complémentaires relatives a l'étanchéité assurée dans une telle structure de joint. The present certificate of addition relates to additional provisions relating to the sealing ensured in such a joint structure.

Suivant une première caractdristique complementaire, le joint englobe un ressort de maintien de la garniture en appui axial de friction contre la branche de l'anneau en L adjacente à celle avec laquelle la garniture coopère par friction radiale, ce qui tend à garantir une pression axiale prédéterminée sens i- blement constante dans le temps une fois le joint monté. According to a first additional characteristic, the seal includes a spring for holding the lining in axial friction support against the branch of the L-ring adjacent to that with which the lining cooperates by radial friction, which tends to guarantee an axial pressure. predetermined meaning quite constant over time once the seal is fitted.

Suivant une autre caractéristique complementaire, la garniture en élastomère a son appui radial de friction assure contre la branche du L adjacente audit rebord de retenue axiale par l'intermediaire d'une lièvre à appui de flexion, ce qui contribue à l'obtention d'un fable coefficient de frottement pour une étanchéité statique et dynamique satisfaisante. According to another additional characteristic, the elastomer lining has its radial friction support against the L branch adjacent to said axial retaining rim by means of a hare with bending support, which contributes to obtaining a reliable coefficient of friction for satisfactory static and dynamic sealing.

D'autres particularites complementaires apparaîtront éaalement dans la description suivante de plusieurs formes de réalisation de joints tournants selon l'invention, représentées à titre d'exemples au dessin annexé, dans lequel :
- la figure 1 est une vue en coupe transversale d'un joint tournant analogue b celui décri t dans le brevet principal
- la figure 2 est une vue en coupe transversale d'un tel joint modifié par adjonction d'un ressort d'appui axial t
- la figure 3 est une vue en coupe transversale d'un joint tournant à garniture à livres frottantes
- la figure 4 est une vue en coupe transversale d'un joint tournant à garniture à lèves frottantes et ressort d'appui axial.Other additional features will also appear in the following description of several embodiments of rotary joints according to the invention, shown by way of examples in the appended drawing, in which:
- Figure 1 is a cross-sectional view of a rotary joint similar to that described in the main patent
- Figure 2 is a cross-sectional view of such a seal modified by adding an axial support spring t
- Figure 3 is a cross-sectional view of a rotary joint with rubbing-book lining
- Figure 4 is a cross-sectional view of a rotary joint with friction lift packing and axial bearing spring.

Le joint tournant représenté à la figure 1 est figure dans ltétat qu'il est amené à prendre une fois mont par emmanchement respectif de ses anneaux métalliques en L 1 et 2, entre deux pièces coaxiales non représentées. La garniture d'étanchéité disposée dans le logement que forment les anneaux 1 et 2 avant repliage du rebord de retenue axiale 6 conduisant à un joint monobloc, est ici constitue d'un corps annulaire 3 en élastomère de section générale rectangulaire pourvu suivant son diamètre interne d'une pellicule anti-friction adhnrisée 4, de préférence à base de polytétrafluoroéthylène, et il lui est en outre associé latéralement, comme déjà évoqué dans le brevet principal, une rondelle anti-friction 17, de préférence aussi à base de polyt- trafluoroéthylène, cooperant avec les sommets des nervures circulaires 5 ménagées sur la branche latérale de l'anneau 2. The rotary joint represented in FIG. 1 is shown in the state that it is required to take once mounted by respective fitting of its metal rings in L 1 and 2, between two coaxial parts not shown. The seal placed in the housing formed by the rings 1 and 2 before folding the axial retaining rim 6 leading to a one-piece seal, is here constituted of an annular body 3 of elastomer of generally rectangular section provided according to its internal diameter an anti-friction anti-friction film 4, preferably based on polytetrafluoroethylene, and it is also associated with it laterally, as already mentioned in the main patent, an anti-friction washer 17, preferably also based on polytrafluoroethylene , cooperating with the tops of the circular ribs 5 formed on the lateral branch of the ring 2.

La garniture est conforméede facon à être soumise à une légère contrainte élastique radiale de montage dans son logement assurant la coopération de friction entre la pellicule 4 et la branche cylindrique de l'anneau 2, tandis qu'une contrainte axiale prédéterminée, assurant la coopération de friction entre rondelle 17 et nervures 5, résulte de l'emmanchement conjoint des deux anneaux 1 et 2 par une poussée latérale d'ensemble les amenant dans la position relative représentée (poussée exercée de la droite dans le cas présent de la figure 1). The gasket is shaped so as to be subjected to a slight radial elastic stress of mounting in its housing ensuring the friction cooperation between the film 4 and the cylindrical branch of the ring 2, while a predetermined axial stress, ensuring the cooperation of friction between washer 17 and ribs 5, results from the joint fitting of the two rings 1 and 2 by an overall lateral thrust bringing them into the relative position shown (thrust exerted from the right in the present case of FIG. 1).

La figure 2 correspond à une variante de la précédente où, dans le but de mieux maitriser la pression axiale prédéterminée et notamment d'en mieux garantir son maintien dans le temps, la garniture 3 b est réduite en dimension axiale pour ménager la place à un ressort d'appui axial 18 interposé entre elle et l'anneau 1 par rapport auquel elle reste statique, étant pourvue comme précédemment d'une pellicule anti-friction 4a et d'une rondelle anti-friction 17a de coopération avec l'anneau 2. Figure 2 corresponds to a variant of the previous one where, in order to better control the predetermined axial pressure and in particular to better guarantee its maintenance over time, the gasket 3b is reduced in axial dimension to provide space for a axial support spring 18 interposed between it and the ring 1 with respect to which it remains static, being provided as before with an anti-friction film 4a and an anti-friction washer 17a for cooperation with the ring 2.

Le joint tournant représenté à la figure 3 comprend lui aussi deux anneaux métalliques en L 1 et 2. La garniture d'étanchéité dispose dans le logement que forment les anneaux 1 et 2 avant repliage du rebord de retenue axiale 6 est ici constituée d'un corps annulaire 3c en élastomère pourvu de lèvre frottantes destinées à coopérer avec l'anneau 2 pour assurer l'étanchéité dynamique du joint, ici encore figuré dans l'état qu'il est amené à prendre une fois monté. The rotary joint shown in Figure 3 also includes two metal rings in L 1 and 2. The seal has in the housing formed by the rings 1 and 2 before folding the axial retaining rim 6 is here constituted of a annular body 3c made of elastomer provided with rubbing lips intended to cooperate with the ring 2 to ensure the dynamic sealing of the seal, here again shown in the state that it is brought to take once mounted.

Le corps circulaire 3c est en appui statique contre l'anneau 1 qui présente un rebord de pincement 7 du corps 3c à l'opposé du rebord 6, tandis que vers l'angle de ce dernier le corps 3c se termine latéralement par une levre d'appui 19 sur l'anneau 1, léaèrement espacée de l'anneau 2. The circular body 3c is in static support against the ring 1 which has a pinch rim 7 of the body 3c opposite the rim 6, while towards the angle of the latter the body 3c ends laterally by a lip d support 19 on the ring 1, slightly spaced from the ring 2.

Les lèvres frottantes comprennent ici une lèvre 20 à appui radial de flexion sur la branche cylindrique de l'anneaux 2, ainsi que deux levures frontales 21, 22 respectivement destine à coopérer aussi par déformation élastique d'appui axial avec les sommets des deux nervures 5 que présente la branche lnterale de l'anneau 2. The rubbing lips here comprise a lip 20 with radial bending support on the cylindrical branch of the rings 2, as well as two frontal yeasts 21, 22 respectively intended to cooperate also by elastic deformation of axial support with the tops of the two ribs 5 presented by the inner branch of ring 2.

La figure 4 correspond à une variante de la précédente où, dans le but de mieux maitriser la pression axiale pr-:déter- minée et notamment d'en mieux aarantir son maintien dans le temp le corps de garniture 3d présente latéralement, face à l'anneau 1, une cavité circulaire 23 de réception d'un ressort d'apoui axial 24. Figure 4 corresponds to a variant of the previous one where, in order to better control the axial pressure pr-: determined and in particular to better ensure its maintenance in time the 3d packing body present laterally, facing the ring 1, a circular cavity 23 for receiving an axial damping spring 24.

La garniture présente des lièvres frottantes 20, 21, 2, comme précédemment. The lining has rubbing hares 20, 21, 2, as before.

Bien entendu, diverses variantes peuvent encore être imaginées dans le cadre de l'invention principalement illustrée par ces réalisations. Of course, various variants can also be imagined in the context of the invention mainly illustrated by these embodiments.

Claims (3)

REVE REVENDICATIONSDREAM CLAIMS 1. Joint tournant entre deux pinces coaxiales, comprenant une armature m0talligue de montage constituée à l'aide de deux anneaux de section générale en L disposés tête-bêche pour former un logement renèrr.ant une aarniture de friction et étanchéité et destinés à être resnectivement montés par emmanchement avec la Diète coaxiale corresnondante, dans lequel l'un desdits anneaux en L présente un rebord de retenue axiale de l'autre formé après contacte entre eux de la garniture, caractérisé en ce au'il englobe un ressort de maintien de la garniture en appui axial de friction contre la branche de l'anneau en L adjacente celle avec laquelle la garniture coopère par friction radiale. 1. Rotating joint between two coaxial clamps, comprising a metal mounting frame constituted by two rings of general L-shaped section arranged head to tail to form a housing renèrr.ant aarniture of friction and sealing and intended to be resnectively mounted by fitting with the corresponding coaxial Diet, in which one of said L-shaped rings has an axial retaining rim of the other formed after contact between them of the lining, characterized in that it includes a spring for retaining the packing in axial friction support against the branch of the adjacent L-ring that with which the packing cooperates by radial friction. 2. Joint tournant entre deux pièces coaxiales, comprenant une armature métallique de montage constituée à l'aide de deux anneaux de section générale en L disposés tête-bêche nour former un loaement renfermant une aarniture de friction et étanchéité et destinés à etre respectivement montés par emmanchement avec la pièce coaxiale correspondante, dans lequel l'un desdits anneaux en L présente un rebord de retenue axiale de l'autre formé après montage entre eux de la garniture, caractérisé en ce aue la garniture en élastomère a son appui radial de friction assuré contre la branche du L adjacente audit rebord de retenue axiale par l'intermédiaire d'une lèvre à appui de flexion. 2. Rotating joint between two coaxial parts, comprising a metal mounting frame formed by means of two rings of general L-shaped section arranged head to tail to form a loaement containing a friction and sealing seal and intended to be respectively mounted by fitting with the corresponding coaxial part, in which one of said L-shaped rings has an axial retaining rim of the other formed after mounting of the lining between them, characterized in that the elastomer lining has its radial friction support provided against the L branch adjacent to said axial retaining rim by means of a lip with bending support. 3. Joint tournant entre deux pièces coaxiales, selon la revendication 1 ou 2, caractérisé en ce que la garniture en élastomère présente comme appui axial de friction au moins une lèvre frontale destinée à coopérer avec la branche de l'anneau en L adjacente à celle se terminant par ledit rebord de retenue. 3. Rotating joint between two coaxial parts, according to claim 1 or 2, characterized in that the elastomer lining has as axial friction support at least one front lip intended to cooperate with the branch of the L-ring adjacent to that ending with said retaining rim.
FR7916556A 1979-06-27 1979-06-27 Watertight rotating shaft seal - has two L-shaped cross=section rings with elastomeric packing and lip seals for reduced friction Pending FR2459924A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7916556A FR2459924A2 (en) 1979-06-27 1979-06-27 Watertight rotating shaft seal - has two L-shaped cross=section rings with elastomeric packing and lip seals for reduced friction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7916556A FR2459924A2 (en) 1979-06-27 1979-06-27 Watertight rotating shaft seal - has two L-shaped cross=section rings with elastomeric packing and lip seals for reduced friction

Publications (1)

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FR2459924A2 true FR2459924A2 (en) 1981-01-16

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FR7916556A Pending FR2459924A2 (en) 1979-06-27 1979-06-27 Watertight rotating shaft seal - has two L-shaped cross=section rings with elastomeric packing and lip seals for reduced friction

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511333A1 (en) * 1984-03-30 1985-10-10 Chicago Rawhide Mfg. Co., Elgin, Ill. UNIFIED SEALS AND METHOD FOR ASSEMBLING THEM
WO1988005137A1 (en) * 1986-12-24 1988-07-14 Dixon International Limited Structural bearings
DE3903386A1 (en) * 1988-06-29 1990-08-09 Josef Nemetz Sealing ring with a guide
DE3920482A1 (en) * 1989-06-22 1991-01-10 Acla Werke Gmbh Shaft seal with at least one sealing ring - has sealing lips with at least two housing sections and annular chamber
EP0520181A1 (en) * 1991-06-25 1992-12-30 Federal-Mogul Corporation Unitized radial shaft seal
WO2001070121A3 (en) * 2000-03-21 2002-04-04 Tode Stojicic Combined seal with rotary and stationary rings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511333A1 (en) * 1984-03-30 1985-10-10 Chicago Rawhide Mfg. Co., Elgin, Ill. UNIFIED SEALS AND METHOD FOR ASSEMBLING THEM
WO1988005137A1 (en) * 1986-12-24 1988-07-14 Dixon International Limited Structural bearings
DE3903386A1 (en) * 1988-06-29 1990-08-09 Josef Nemetz Sealing ring with a guide
DE3920482A1 (en) * 1989-06-22 1991-01-10 Acla Werke Gmbh Shaft seal with at least one sealing ring - has sealing lips with at least two housing sections and annular chamber
EP0520181A1 (en) * 1991-06-25 1992-12-30 Federal-Mogul Corporation Unitized radial shaft seal
WO2001070121A3 (en) * 2000-03-21 2002-04-04 Tode Stojicic Combined seal with rotary and stationary rings

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