WO1994008159A1 - Bague d'etancheite - Google Patents

Bague d'etancheite Download PDF

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Publication number
WO1994008159A1
WO1994008159A1 PCT/EP1993/002719 EP9302719W WO9408159A1 WO 1994008159 A1 WO1994008159 A1 WO 1994008159A1 EP 9302719 W EP9302719 W EP 9302719W WO 9408159 A1 WO9408159 A1 WO 9408159A1
Authority
WO
WIPO (PCT)
Prior art keywords
lip
sealing
retaining ring
ring
collar
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/EP1993/002719
Other languages
German (de)
English (en)
Inventor
Hans-Jürgen BRANDT
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.)
MARTIN MERKEL GmbH and Co KG
Original Assignee
MARTIN MERKEL GmbH and Co KG
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 MARTIN MERKEL GmbH and Co KG filed Critical MARTIN MERKEL GmbH and Co KG
Publication of WO1994008159A1 publication Critical patent/WO1994008159A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • 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
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3276—Mounting of sealing rings with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • the invention relates to a sealing ring for radial sealing between a cylindrical inner surface, for example a shaft, and a hollow cylindrical outer surface surrounding it coaxially, for example a housing surface.
  • the sealing ring comprises a retaining ring made of dimensionally stable material, in particular metal, which can be connected to one of the two surfaces as a carrier surface via a press fit. It also comprises a part connected to the retaining ring, which forms a sealing lip which interacts with the other surface as a counter-sealing surface and is therefore referred to here in its entirety as a lip part. It consists of tough elastic material, in particular polytetrafluoroethylene in pure or modified form or a polyfluorocarbon.
  • Shaft seals with a metal holding part are known (DE-C 34 31 990, DE-A 35 45 683, DE-A 35 06 925, DE-C 27 43 501, DE-A 25 00 099, DE-A 20 19 585 , DE-A 24 27 537, DE-U 86 22 076). They are used to fasten the sealing ring by a press fit in a housing bore, with no further fastening means being required. They hold the lip part of the sealing ring by gluing between two separate ones Ring parts forming a cage or by vulcanization by means of an intermediate part or by clamping a projection of the lip part in a groove of the holding part.
  • the retaining ring is not only protected from the medium, but is also covered on its outer side by a rubber-elastic layer which takes over the contact with the housing bore, ensures a good seal there and, due to its elasticity, is able to accept large tolerances.
  • This principle cannot be applied to polyfluorocarbons, in particular polytetrafluoroethylene, because this is subject to a cold flow under the tension which maintains the frictional and sealing contact with the housing bore, which over time causes this force and thus also the sealing - and brings the holding effect to a standstill. Therefore, when using fluorocarbons for the lip part, the metal cages described above were used.
  • the invention has for its object to provide a sealing ring of the type mentioned, which does not have these disadvantages.
  • the solution according to the invention lies in the features of claim 1 and preferably also in the features of the subclaims.
  • the sealing ring can be used like the proven sealing rings with a metal cage.
  • the arrangement of the jacket part provided on the lip part between an annular projecting collar of the holding part and the support surface on the one hand causes the holding part to be shielded from the medium to be sealed and on the other hand also seals off the support surface.
  • the retaining ring can also be manufactured individually at low cost, so that high tool costs, which otherwise force the restriction to standard dimensions, do not arise.
  • the deformation of the plastic also causes it to lay itself identically on any unevenness of the support surface, the low internal tension of the material, which is still maintained even after cold flow, is sufficient for a gap-free and tight contact, as long as the casing part is held in place by the retaining ring and place is held.
  • the excess of the retaining ring on the one hand and the jacket part on the other hand is dimensioned according to known principles or according to simple experiments so that the desired effect is achieved.
  • the expression press fit is not to be understood as a reference to specific pairings of fit, but is merely intended to express that one surface has an excess compared to the other, which, after assembly, leads to a pressure which, in the case of the retaining ring, required holding force and the desired sealing pressure is ensured in the case of the plastic jacket part.
  • a groove is expediently provided on the lip part, which fits the collar of the retaining ring and which is delimited by the casing part on the side facing the carrier surface.
  • the groove is delimited by a groove wall, from the end of which the lip facing the retaining ring can extend. This creates the possibility of allowing the sealing lip to run from the side facing away from the medium to be sealed to the medium side and to the counter-sealing surface within the axial region which is enclosed by the retaining ring and the casing part.
  • the arrangement of the collar of the retaining ring of the groove of the lip part also has the advantage that these two rings can be treated as an assembly unit without substantial attention without having to be firmly connected to one another. However, it should not be ruled out that, if desired, the lip also the end of the casing part remote from the retaining ring is attached without forming a special groove.
  • the tension remaining in the jacket part after cold flow is sufficient to maintain the sealing contact with the support surface.
  • this can be supported in that the collar or a part connected thereto additionally exerts a spring force on the jacket part in the direction of the support surface.
  • the collar can be designed as a radially resilient ring, or a corresponding ring spring can be arranged between the collar and the jacket part.
  • An elastomeric intermediate ring can also be used for these purposes.
  • the spring element is tensioned during assembly by the compression of the jacket part and then provides a long-term deformation reserve if the cold flow continues and the thickness of the jacket part is reduced.
  • Fig. 1 shows a first embodiment
  • Fig. 2 shows a second embodiment
  • Fig. 3 shows a third embodiment of the invention, each in a meridional half-section.
  • a receiving bore 3 is provided with respect to the axis 2, which is delimited to the inside of the housing by a collar 4 and is open to the outside of the housing.
  • the bore 3 forms the support surface for the sealing ring 5, the lip 6 of which seals against a counter-sealing surface which is formed by the surface 7 of a shaft. It is inclined inwards towards the counter-sealing surface, around the outlet of a medium located within the housing 1 to prevent outside. 1 is provided for differential pressures up to a few bar.
  • the sealing ring consists of the retaining ring 8 made of metal, in particular stainless steel, and the u.a. the sealing lip 6 form the lip part 9 together.
  • the lip part contains a groove which receives the collar 10 of the holding part, which is delimited on the outside by the casing part 11 and on the inside by a part 12 running parallel to the casing part.
  • the lip part consists, for example, of polytetrafluoroethylene, which can be modified by suitable additives to achieve the desired properties.
  • the retaining ring 8 and the lip part 9 are only put together loosely, it may be expedient if the groove receiving the collar 10 exerts a certain clamping or adhesion thereon in order to facilitate uniform handling. However, this is not necessary.
  • the outer surface 13 of the retaining ring 8 has an oversize which, after assembly, results in a press fit which also holds the seal in the bore without further fastening means.
  • additional fasteners could be provided.
  • the lip part is fixed locally between the retaining ring 8 and the collar 4.
  • the outer diameter of its jacket part 11 (more precisely: its radial thickness between the collar 10 and the bore surface 3) has such an oversize compared to the bore surface 3 that it is radially compressed during assembly.
  • the collar 10 can also be elastically deformed inwards. This creates a sealing pressure between the outer surface of the casing 11 and the bore surface 3, which guarantees an adequate seal at this point. If, subsequently, a cold flow of the jacket part 11 takes place under this force, by means of which the wall thickness is reduced, this force disappears except for one of the type of Material-dependent remaining amount.
  • the outer surface of the casing part 11 forms intimately all unevenness of the bore surface 3, so that even the slight residual force is sufficient to hold the outer surface of the casing part on the bore surface without gaps. This is only possible in that the jacket part 11 is held in its position uniformly by the collar 10 over the entire circumference.
  • the lip 6 is attached so that it rests on the counter-sealing surface under elastic prestressing, which can also be reinforced in a known manner by additional spring means.
  • the embodiment according to FIG. 2 differs from that according to FIG. 1 on the one hand in that the retaining ring 8 is brought close to the shaft in the region 14 and is thereby provided with a shaped contact surface for the lip 6 in order to support it at higher pressures .
  • peripheral surface of the casing part 11 is equipped with sawtooth-shaped ring ribs 15, which form the oversize in relation to the diameter of the housing bore. They give the possibility of making the total volume of the collar 11 equal to or smaller than the volume available between the collar 10 and the housing bore, which simplifies assembly.
  • the sealing ring is additionally provided with an outwardly turned dust lip 16 to protect the sensitive PTFE lip.
  • the jacket part 11 is axially slotted from the side facing the pressure medium in the installed state, so that the part 17 lying outside the slot forms a lip opposite to the pressure difference.
  • the gap 18 can (must but not) be completely closed during assembly by radial pressure. Nevertheless, the medium pressure acts on him, which presses the lip 17 against the surface of the bore and thereby contributes to the sealing on the house side.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials For Medical Uses (AREA)
  • Glass Compositions (AREA)
  • Sealing Devices (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Gasket Seals (AREA)

Abstract

Une bague d'étanchéité assure l'étanchéité radiale entre une surface cylindrique interne (7) et une surface cylindrique creuse externe (3) qui entoure coaxialement la surface cylindrique interne. La bague d'étanchéité comprend un anneau de retenue (8) en un matériau indéformable reliable par ajustement serré à une des deux surfaces, qui sert de surface de support, et une lèvre (9) en matériau viscoplastique (par exemple PTFE) reliée à l'anneau de retenue (8), fixée par ajustement serré sur la même surface de support que l'anneau de retenue (8) et servant de lèvre d'étanchéité (6) qui coopère avec l'autre surface (7) comme surface d'étanchéité complémentaire. Une enveloppe (11) est située entre un col annulaire saillant (10) de l'anneau de retenue (8) et la surface de support afin de protéger l'anneau de retenue (8) du milieu à sceller et par rapport à la surface de support. La lèvre (6) est recourbée depuis l'extrémité opposée à l'anneau de retenue (8) de la partie (12) de la paroi située du côté de la rainure opposée à l'enveloppe (11), de manière à s'éloigner de l'anneau de retenue (8).
PCT/EP1993/002719 1992-10-05 1993-10-05 Bague d'etancheite Ceased WO1994008159A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG9213374.6U 1992-10-05
DE9213374U DE9213374U1 (de) 1992-10-05 1992-10-05 Dichtring

Publications (1)

Publication Number Publication Date
WO1994008159A1 true WO1994008159A1 (fr) 1994-04-14

Family

ID=6884459

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/002719 Ceased WO1994008159A1 (fr) 1992-10-05 1993-10-05 Bague d'etancheite

Country Status (2)

Country Link
DE (1) DE9213374U1 (fr)
WO (1) WO1994008159A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711616A (en) * 1995-04-10 1998-01-27 The Timken Company Bearing seal for providing static and dynamic barriers
DE19934453A1 (de) * 1999-07-27 2001-02-15 Freudenberg Carl Fa Dichtring
DE102011054003A1 (de) 2011-09-28 2013-03-28 Pierburg Gmbh Dichtungsanordnung für ein Ventil einer Verbrennungskraftmaschine
US20130307228A1 (en) * 2012-05-18 2013-11-21 Freudenberg-Nok General Partnership Low Load Seal With Outer Diameter Flap

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1284782B1 (it) * 1996-09-06 1998-05-21 Rft Spa Coperchio a tenuta stagna in lamiera per l'alloggiamento passante di un organo meccanico in movimento, in particolare l'albero motore di
DE19841123B4 (de) * 1998-09-09 2008-01-03 Vr Dichtungen Gmbh Radialwellendichtring
DE102010018421B4 (de) * 2010-04-27 2016-06-09 Hosokawa Alpine Aktiengesellschaft Doppelwellenanordnung mit verstellbarem Achsabstand und verbesserter Dichtungseinheit
DE102012202862A1 (de) 2012-02-24 2013-08-29 Vr Automotive Dichtungssysteme Gmbh Radialwellendichtung
DE102018003365B4 (de) 2018-04-25 2025-03-06 Wallstabe & Schneider GmbH & Co. KG Dichtung mit Stützkörper für Drehschieberwelle

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1909530A1 (de) * 1969-02-26 1970-09-17 Acla Werke Ag Abstreifer-Manschette
DE2019585A1 (de) * 1970-04-23 1971-11-11 Schmid Leopold F Abdichtung eines Gehaeuses gegenueber einer Welle oder einer Stange
DE2427537A1 (de) * 1973-06-22 1975-01-23 Burgmann Dichtungswerk Feodor Dichtungsanordnung
DE2500099A1 (de) * 1975-01-03 1976-07-08 Goetzewerke Lippendichtungsring mit laufring
DE2743501A1 (de) * 1977-09-28 1979-03-29 Freudenberg Carl Fa Dichtring
DE3431990A1 (de) * 1984-08-31 1986-03-13 Kaco Gmbh + Co, 7100 Heilbronn Manschette fuer dichtungen, vorzugsweise fuer radialwellendichtringe
DE3506925A1 (de) * 1985-02-27 1986-08-28 Kaco Gmbh + Co, 7100 Heilbronn Dichtung
DE8622076U1 (de) * 1986-08-16 1986-10-02 Volkswagen AG, 3180 Wolfsburg Radialflexible Wellen- oder Stangendichtung
DE3545683C1 (de) * 1985-12-21 1987-07-16 Freudenberg Carl Fa Wellendichtung
EP0297166A1 (fr) * 1987-06-25 1989-01-04 Firma Carl Freudenberg Joint à lèvre
EP0460366A1 (fr) * 1990-06-07 1991-12-11 GOETZE Elastomere GmbH Joint à lèvre

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2255816A5 (fr) * 1973-12-19 1975-07-18 Dechavanne Jacques

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1909530A1 (de) * 1969-02-26 1970-09-17 Acla Werke Ag Abstreifer-Manschette
DE2019585A1 (de) * 1970-04-23 1971-11-11 Schmid Leopold F Abdichtung eines Gehaeuses gegenueber einer Welle oder einer Stange
DE2427537A1 (de) * 1973-06-22 1975-01-23 Burgmann Dichtungswerk Feodor Dichtungsanordnung
DE2500099A1 (de) * 1975-01-03 1976-07-08 Goetzewerke Lippendichtungsring mit laufring
DE2743501A1 (de) * 1977-09-28 1979-03-29 Freudenberg Carl Fa Dichtring
DE3431990A1 (de) * 1984-08-31 1986-03-13 Kaco Gmbh + Co, 7100 Heilbronn Manschette fuer dichtungen, vorzugsweise fuer radialwellendichtringe
DE3506925A1 (de) * 1985-02-27 1986-08-28 Kaco Gmbh + Co, 7100 Heilbronn Dichtung
DE3545683C1 (de) * 1985-12-21 1987-07-16 Freudenberg Carl Fa Wellendichtung
DE8622076U1 (de) * 1986-08-16 1986-10-02 Volkswagen AG, 3180 Wolfsburg Radialflexible Wellen- oder Stangendichtung
EP0297166A1 (fr) * 1987-06-25 1989-01-04 Firma Carl Freudenberg Joint à lèvre
EP0460366A1 (fr) * 1990-06-07 1991-12-11 GOETZE Elastomere GmbH Joint à lèvre

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711616A (en) * 1995-04-10 1998-01-27 The Timken Company Bearing seal for providing static and dynamic barriers
DE19934453A1 (de) * 1999-07-27 2001-02-15 Freudenberg Carl Fa Dichtring
DE19934453C2 (de) * 1999-07-27 2001-11-29 Freudenberg Carl Fa Dichtring
DE102011054003A1 (de) 2011-09-28 2013-03-28 Pierburg Gmbh Dichtungsanordnung für ein Ventil einer Verbrennungskraftmaschine
WO2013045200A1 (fr) 2011-09-28 2013-04-04 Pierburg Gmbh Garniture d'étanchéité pour une soupape d'un moteur à combustion interne
DE102011054003B4 (de) * 2011-09-28 2017-03-16 Pierburg Gmbh Ventil für eine Verbrennungskraftmaschine mit einer Dichtungsanordnung
US20130307228A1 (en) * 2012-05-18 2013-11-21 Freudenberg-Nok General Partnership Low Load Seal With Outer Diameter Flap
US10514101B2 (en) 2012-05-18 2019-12-24 Freudenberg—NOK General Partnership Low load seal with outer diameter flap

Also Published As

Publication number Publication date
DE9213374U1 (de) 1994-02-10

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