EP1087108A1 - Ventilschaftabdichtung - Google Patents
Ventilschaftabdichtung Download PDFInfo
- Publication number
- EP1087108A1 EP1087108A1 EP00114494A EP00114494A EP1087108A1 EP 1087108 A1 EP1087108 A1 EP 1087108A1 EP 00114494 A EP00114494 A EP 00114494A EP 00114494 A EP00114494 A EP 00114494A EP 1087108 A1 EP1087108 A1 EP 1087108A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lip
- sealing lip
- seal
- bead sections
- sealing
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 239000011324 bead Substances 0.000 claims abstract description 21
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 239000000806 elastomer Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
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, especially a valve stem seal for Internal combustion engines with one of a metallic sleeve held elastomeric sealing element, which seals the machine part comprehensive sealing lip, which is inclined by two inclined against each other frustoconical surfaces is formed.
- the object of the invention is therefore to create a seal, which is simple in its structure and in its manufacture, a defined leakage allowed on the reciprocating machine part and a central guidance of sealing lip and machine part. In doing so, a loss of function should also occur can be avoided with longer operating times.
- the ring bead sections are located in the flexible transition area of the Sealing element between the upper edge of the rigid metal sleeve and the Sealing lip.
- the interrupted centering lip may cause one Displacement of the sealing lip in a concentric position to the valve stem.
- the elastomer has a different stiffness between the sealing lip and the centering lip than the elastomer between the centering lip and the top edge of the Metal sleeve.
- the number of ring bead sections depends on the area of application of the seal Voted. With a valve stem seal, it should be more than three.
- the circumferential length of all ring bead sections is also on the Application area coordinated. It should be 10 to 90% of that Total circumferential length in the area of the ring bead sections. The bigger the space between the individual ring bead sections is all the less the possibility for the formation of possible oil pockets.
- FIG 1 the left half of a seal is shown in longitudinal section.
- the valve stem 1 undergoes a reciprocating movement and is in the Guided tour 2 held.
- the seal 3 is put out the metallic sleeve 4 and a sealing element 5 firmly connected thereto consists.
- the sealing element 5 has the sealing lip 6 through the ring tension spring 7 is pressed onto the valve stem 1.
- For fastening on the guide 2 engages the sealing element 5 with known bulges 8 around the Tour 2.
- the sealing lip 6 is of two frustoconical surfaces 9 and 10 formed or limited.
- the inner surface 10 is the bottom of the Sealing lip 6. It has several evenly distributed over its circumference concentric ring bead sections 11, the inner diameter D of which is larger than the inner diameter d of the sealing lip 6.
- Form the annular bead sections 11 an interrupted centering lip 20.
- there are four Ring bead sections 11 are provided, which is about 80% of the total circumferential length Take in the area of the annular bead sections 11.
- the annular bead sections 11 are in the flexible transition region 13 of the Sealing element 5 between the upper edge 14 of the rigid metal sleeve 4 and the sealing lip 6 arranged.
- the elastomer 15 between the sealing lip 6 and Centering lip 20 is equipped with a different stiffness than the elastomer 16 between the centering lip 20 and the upper edge 14 of the metal sleeve 4. This is achieved in particular through constructive designs.
- annular bead portions 11 have no effect on the are intentional leakage. Experiments have shown that the positioning of the Centering lip 20 below the sealing lip 6, i.e. on their bottom 10 too best results. An arrangement of the centering lip above the However, sealing lip 6 is also possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
Description
Claims (6)
- Dichtung für hin- und hergehende Maschinenteile insbesondere Ventilschaftdichtung für Verbrennungskraftmaschinen mit einem von einer metallischen Hülse gehaltenen elastomeren Dichtelement, das eine das Maschinenteil dichtend umfassende Dichtlippe hat, die durch zwei gegeneinander geneigte kegelstumpfförmige Oberflächen gebildet ist, dadurch gekennzeichnet, daß die innenliegende Bodenseite (10) der Dichtlippe (6) auf ihrem Umfang verteilt mit mehreren konzentrischen, eine unterbrochene Zentrierlippe (20) bildenden Ringwulstabschnitten (11) versehen ist, deren Innendurchmesser (D) größer als der Innendurchmesser (d) der Dichtlippe (6) ist.
- Dichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zentrierlippe (20) im flexiblen Übergangsbereich (13) des Dichtelements (5) zwischen der oberen Kante (14) der steifen Metallhülse (4) und der Dichtlippe (6) angeordnet ist.
- Dichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Elastomer (15) zwischen der Dichtlippe (6) und der Zentrierlippe (20) eine andere Steifigkeit aufweist als das Elastomer (16) zwischen der Zentrierlippe (20) und der oberen Kante (14) der Metallhülse (4).
- Dichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Anzahl der Ringwulstabschnitte (11) mehr als drei beträgt.
- Dichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Umfangslänge aller Ringwulstabschnitte (11) 10 bis 90 % der Gesamtumfangslänge im Bereich der Ringwulstabschnitte (11) beträgt.
- Dichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ringwulstabschnitte (11) eine höhere Steifigkeit als die Dichtlippe (6) haben.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19945348 | 1999-09-22 | ||
| DE19945348A DE19945348C2 (de) | 1999-09-22 | 1999-09-22 | Dichtung für hin- und hergehende Maschinenteile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1087108A1 true EP1087108A1 (de) | 2001-03-28 |
| EP1087108B1 EP1087108B1 (de) | 2004-11-17 |
Family
ID=7922863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00114494A Expired - Lifetime EP1087108B1 (de) | 1999-09-22 | 2000-07-06 | Ventilschaftabdichtung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1087108B1 (de) |
| DE (2) | DE19945348C2 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10207382C1 (de) * | 2002-02-21 | 2003-05-15 | Freudenberg Carl Kg | Ventilschaftdichtung für eine Brennkraftmaschine |
| EP1818514A1 (de) * | 2006-02-14 | 2007-08-15 | Carl Freudenberg KG | Versiegelungsvorrichtung |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10116846A1 (de) * | 2001-04-04 | 2002-10-31 | Freudenberg Carl Kg | Dichtring |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US4947811A (en) | 1989-06-30 | 1990-08-14 | Dana Corporation | Floating valve stem seal |
| EP0639695A1 (de) * | 1993-07-20 | 1995-02-22 | Firma Carl Freudenberg | Ventilschaftdichtung |
| US5553869A (en) * | 1994-12-12 | 1996-09-10 | Dana Corporation | Bonded valve stem seal with retainer tangs |
| DE19841123A1 (de) * | 1998-09-09 | 2000-04-13 | Vr Dichtungen Gmbh | Radialwellendichtring |
| EP0995932A1 (de) * | 1998-10-20 | 2000-04-26 | France-Joint S.A. | Kassettendichtung |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3326562A (en) * | 1963-01-18 | 1967-06-20 | Goetzewerke | Valve-shaft seal for internal combustion engines |
| 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 |
-
1999
- 1999-09-22 DE DE19945348A patent/DE19945348C2/de not_active Expired - Fee Related
-
2000
- 2000-07-06 DE DE50008651T patent/DE50008651D1/de not_active Expired - Lifetime
- 2000-07-06 EP EP00114494A patent/EP1087108B1/de not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US4947811A (en) | 1989-06-30 | 1990-08-14 | Dana Corporation | Floating valve stem seal |
| EP0639695A1 (de) * | 1993-07-20 | 1995-02-22 | Firma Carl Freudenberg | Ventilschaftdichtung |
| US5553869A (en) * | 1994-12-12 | 1996-09-10 | Dana Corporation | Bonded valve stem seal with retainer tangs |
| DE19841123A1 (de) * | 1998-09-09 | 2000-04-13 | Vr Dichtungen Gmbh | Radialwellendichtring |
| EP0995932A1 (de) * | 1998-10-20 | 2000-04-26 | France-Joint S.A. | Kassettendichtung |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10207382C1 (de) * | 2002-02-21 | 2003-05-15 | Freudenberg Carl Kg | Ventilschaftdichtung für eine Brennkraftmaschine |
| EP1338763A3 (de) * | 2002-02-21 | 2003-10-29 | Carl Freudenberg KG | Ventilschaftdichtung für eine Brennkraftmaschine |
| EP1818514A1 (de) * | 2006-02-14 | 2007-08-15 | Carl Freudenberg KG | Versiegelungsvorrichtung |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1087108B1 (de) | 2004-11-17 |
| DE19945348A1 (de) | 2001-04-19 |
| DE50008651D1 (de) | 2004-12-23 |
| DE19945348C2 (de) | 2003-07-10 |
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