EP1087108B1 - Joint de queue de soupape - Google Patents

Joint de queue de soupape Download PDF

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Publication number
EP1087108B1
EP1087108B1 EP00114494A EP00114494A EP1087108B1 EP 1087108 B1 EP1087108 B1 EP 1087108B1 EP 00114494 A EP00114494 A EP 00114494A EP 00114494 A EP00114494 A EP 00114494A EP 1087108 B1 EP1087108 B1 EP 1087108B1
Authority
EP
European Patent Office
Prior art keywords
lip
annular bead
sealing lip
sealing
seal
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.)
Expired - Lifetime
Application number
EP00114494A
Other languages
German (de)
English (en)
Other versions
EP1087108A1 (fr
Inventor
Michael Arora
Pier Giorgio Ferrero
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg 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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP1087108A1 publication Critical patent/EP1087108A1/fr
Application granted granted Critical
Publication of EP1087108B1 publication Critical patent/EP1087108B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant

Definitions

  • the present invention relates to a seal for reciprocating Machine parts, in particular a valve stem seal for Internal combustion engines with one of a metallic sleeve held elastomeric sealing element, the one sealing the machine part comprehensive sealing lip has, by two mutually inclined frusto-conical surfaces is formed.
  • valve stem seal is known from US Pat. No. 3,554,180. in the by placing a cap, the elastomeric seal between this and the valve stem guide is compressed and so an axial pressure is to be achieved on the sealing ring, thereby radially sealing the sealing lip Press valve stem.
  • this construction is not capable of a longer one Operating time to compensate for the asymmetric wear.
  • the invention is therefore based on the object to provide a seal, which is simple in their construction and their manufacture, a defined leakage allowed on the reciprocating machine part and a centric guide of sealing lip and machine part results. It should also a loss of function be avoided with longer operating time.
  • the solution of the task is carried out at a seal of the beginning mentioned genus according to the invention in that preferably the inside bottom side of the sealing lip distributed on its circumference with several concentric, forming a broken Zentrierlippe Is provided annular bead sections whose inner diameter is greater than that Inner diameter of the sealing lip is.
  • the basic structure of metal sleeve and sealing lip are retained.
  • the interrupted centering lip is in the form of several Annular bead sections attached, which the sealing lip in a concentric Position to valve stem stops. The annular bead sections then come into action when a displacement of the parts occurs to each other.
  • the annular bead sections are located in the flexible transition region of the Sealing element between the upper edge of the rigid metal sleeve and the Sealing lip.
  • the interrupted centering lip causes a possibly Displacement of the sealing lip in a concentric position to the valve stem.
  • the number of annular bead sections is on the application of the seal Voted. For a valve stem seal, it should be more than three.
  • the circumferential length of all annular bead sections is on the Scope coordinated. It should be 10 to 90% of Total circumferential length in the range of the annular bead sections amount. The bigger the free space between the individual annular bead sections is lower the possibility of forming any oil pockets.
  • the left half of a seal is shown in longitudinal section.
  • the valve stem 1 undergoes a reciprocating motion and is in the Leadership 2 held.
  • the seal 3 is placed, the the metallic sleeve 4 and a sealing element 5 fixedly connected thereto consists.
  • the sealing element 5 has the sealing lip 6, by the ring clamping spring 7 is pressed against the valve stem 1.
  • the sealing element 5 For attachment to the guide 2 engages the sealing element 5 with known bulges 8 to the Leadership 2.
  • the sealing lip 6 is made of two frustoconical surfaces 9 and 10th formed or limited.
  • the inner surface 10 is the bottom side of the Sealing lip 6. It has several evenly distributed on its circumference concentric annular bead portions 11 whose inner diameter D is larger as the inner diameter d of the sealing lip 6.
  • the annular bead portions 11 form a broken centering lip 20.
  • the annular bead portions 11 are in the flexible transition region 13 of the Seal member 5 between the upper edge 14 of the rigid metal sleeve 4 and arranged the sealing lip 6.
  • the elastomer 15 between the sealing lip 6 and the Centering lip 20 equipped with a different stiffness than the elastomer 16 between the centering lip 20 and the upper edge 14 of the metal sleeve 4th This is achieved in particular by constructive embodiments.

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

Claims (6)

  1. Joint pour parties de machines allant et venant, en particulier joint de queue de soupape pour machines à combustion interne ayant un élément d'étanchéité maintenu par une douille métallique, qui possède une lèvre d'étanchéité entourant la partie de machine de façon étanche, laquelle lèvre est formée par deux surfaces de forme tronconique inclinées l'une contre l'autre, caractérisé en ce que le côté de fond intérieur (10) de la lèvre d'étanchéité (6) est munie de plusieurs sections de renflements annulaires (11) concentriques formant une lèvre de centrage interrompue (20), réparties sur son périmètre, dont le diamètre intérieur (D) est supérieur au diamètre intérieur (d) de la lèvre d'étanchéité (6).
  2. Joint selon la revendication 1, caractérisé en ce que la lèvre de centrage (20) est agencée dans une zone de transition flexible (13) de l'élément d'étanchéité (5) entre l'arête supérieure (14) de la douille métallique rigide (4) et la lèvre d'étanchéité (6).
  3. Joint selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'élastomère (15) entre la lèvre d'étanchéité (6) et la lèvre de centrage (20) présente une autre rigidité que l'élastomère (16) entre la lèvre de centrage (20) et l'arête supérieure (14) de la douille métallique (4).
  4. Joint selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le nombre de sections de renflements annulaires (11) est supérieur à trois.
  5. Joint selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la longueur du périmètre de toutes les sections de renflements annulaires (11) représente 10 à 90 % de la longueur totale du périmètre dans la zone des sections de renflements annulaires (11).
  6. Joint selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les sections de renflements annulaires (11) possèdent une autre rigidité que la lèvre d'étanchéité (6).
EP00114494A 1999-09-22 2000-07-06 Joint de queue de soupape Expired - Lifetime EP1087108B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19945348A DE19945348C2 (de) 1999-09-22 1999-09-22 Dichtung für hin- und hergehende Maschinenteile
DE19945348 1999-09-22

Publications (2)

Publication Number Publication Date
EP1087108A1 EP1087108A1 (fr) 2001-03-28
EP1087108B1 true EP1087108B1 (fr) 2004-11-17

Family

ID=7922863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00114494A Expired - Lifetime EP1087108B1 (fr) 1999-09-22 2000-07-06 Joint de queue de soupape

Country Status (2)

Country Link
EP (1) EP1087108B1 (fr)
DE (2) DE19945348C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116846A1 (de) * 2001-04-04 2002-10-31 Freudenberg Carl Kg Dichtring
DE10207382C1 (de) * 2002-02-21 2003-05-15 Freudenberg Carl Kg Ventilschaftdichtung für eine Brennkraftmaschine
JP2007218282A (ja) * 2006-02-14 2007-08-30 Nok Corp 密封装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326562A (en) * 1963-01-18 1967-06-20 Goetzewerke Valve-shaft seal for internal combustion engines
US3554180A (en) 1969-03-21 1971-01-12 Gen Motors Corp Valve stem seal
US4125265A (en) * 1977-07-06 1978-11-14 Borg-Warner Corporation Valve stem seal
GB8323418D0 (en) * 1983-09-01 1983-10-05 Fenner Co Ltd J H Valve stem seals
DE3524560A1 (de) * 1985-07-10 1987-01-15 Porsche Ag Ventilfuehrung
US4947811A (en) 1989-06-30 1990-08-14 Dana Corporation Floating valve stem seal
FR2708037B1 (fr) * 1993-07-20 1995-09-01 Procal Joint de tige de soupape.
US5553869A (en) * 1994-12-12 1996-09-10 Dana Corporation Bonded valve stem seal with retainer tangs
DE19841123B4 (de) * 1998-09-09 2008-01-03 Vr Dichtungen Gmbh Radialwellendichtring
FR2784732B1 (fr) * 1998-10-20 2000-12-01 France Joint Cartouche d'etancheite

Also Published As

Publication number Publication date
DE19945348C2 (de) 2003-07-10
DE50008651D1 (de) 2004-12-23
EP1087108A1 (fr) 2001-03-28
DE19945348A1 (de) 2001-04-19

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