WO2013045200A1 - Garniture d'étanchéité pour une soupape d'un moteur à combustion interne - Google Patents

Garniture d'étanchéité pour une soupape d'un moteur à combustion interne Download PDF

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Publication number
WO2013045200A1
WO2013045200A1 PCT/EP2012/066867 EP2012066867W WO2013045200A1 WO 2013045200 A1 WO2013045200 A1 WO 2013045200A1 EP 2012066867 W EP2012066867 W EP 2012066867W WO 2013045200 A1 WO2013045200 A1 WO 2013045200A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall surface
radially
valve
leg
internal combustion
Prior art date
Application number
PCT/EP2012/066867
Other languages
German (de)
English (en)
Inventor
Alvito Fernandes
Janusz Zurke
Original Assignee
Pierburg Gmbh
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 Pierburg Gmbh filed Critical Pierburg Gmbh
Publication of WO2013045200A1 publication Critical patent/WO2013045200A1/fr

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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
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/322—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction perpendicular to the surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air

Definitions

  • the invention relates to a sealing arrangement for a valve of an internal combustion engine with a radially outer fixed hollow cylindrical wall surface, a radially inner translationally movable cylinder wall surface, a lip seal, a support member and extending from the support member radially inner leg, the end of which rests against the cylinder wall surface and a extending from the support member radially outer leg, the end of which rests against the hollow cylindrical wall surface, so that the lip seal separates an inner space of the valve from an outer space and a fixed radially extending wall surface which surrounds the inner cylinder wall surface and against the support member of the lip seal axially abutting.
  • Lip seals between a movable piston and a fixed hollow cylinder are used, for example, in the tumble valves on turbochargers to separate an internal space of the valve, in which, for example, the pressure of the pressure side of the compressor of the turbocharger from an outer space in which the pressure of the suction side of the Compressor is applied.
  • Such a sealing arrangement is known for example from DE 10 2009 011 938 B3, wherein the lip seal disclosed therein has two legs arranged at the same angle to the cylinder axis, from where the radially inner leg is made shorter.
  • EP 1 941 138 Bl discloses such a sealing ring.
  • seals are often made of PTFE, as this material is ; especially suitable for high temperature applications, so it can be used at temperatures of 250 ° C. At the same time, this material offers particularly good sliding properties, so that it is particularly well suited for a seal between two relatively moving parts.
  • a disadvantage of this material is its low spring-back property and low heat resistance at temperatures above 150 ° C. Its rigidity is reduced to about half compared with normal ambient temperatures at service temperatures of about 100 ° C, to about half at about 150 ° C, even to about one-third of the usual value,
  • steel springs are incorporated into the PTFE gaskets which, after deformation, are intended to ensure that the gasket regains its original shape.
  • WO 94/08159 AI proposes a sealing ring with a radially inwardly facing sealing lip for radial sealing of two cylindrical surfaces, in which a retaining ring made of a dimensionally stable material with the actual seal made of PTFE is firmly connected.
  • the retaining ring has a projection which engages in a groove of the sealing ring.
  • a radially inner contact surface is formed on the retaining ring, which extends axially and radially approximately in the direction of the inner sealing lip and against which rests the lip at higher pressures. After radially outward, the sealing ring seals over an axially extending sealing surface.
  • Such a constructed sealing ring is relatively expensive to manufacture and has in a use area in the vehicle due to the large temperature range in the radially outer area the problem of leaks, since expansion or contraction of the sealing body due to changing temperatures can not be compensated.
  • the object is to provide a sealing arrangement that ensures high tightness at widely varying pressures and temperatures over a long lifetime.
  • the gasket should be suitable for use in a diverter valve.
  • a radially inner surface of the projection extends parallel to the cylinder wall surface, whereby a small sealing effect is already achieved at sufficiently small distances.
  • a radially outer surface of the projection extends parallel to the relaxed radially inner leg of the lip sealing ring.
  • a relatively flat contact of the leg arises at elevated internal pressure, so that account for an elevated load of individual sections of the inner leg.
  • the radially outer surface of the projection is spaced from the relaxed leg of the lip seal arranged. This means that at lower temperatures and pressures, despite the support structure, the entire sealing leg length is available for generating the contact pressure.
  • the radially inner leg of the lip seal encloses a greater angle to the cylinder axis than the radially outer leg.
  • the outer leg which is not burdened by movement of the wall contact surface, can accordingly bear against the wall surface if there is an increased pressure.
  • Such a high contact pressure of the leg by spring action as on the inner side is not required.
  • the lip seal is made of PTFE. This material has a high continuous service temperature and very good sliding properties.
  • the radially outer fixed hollow cylindrical wall surface on a shoulder wherein the radially outer leg of the lip seal protrudes into the recess formed in the recess in the hollow cylindrical wall surface.
  • a sealing arrangement is provided with which, at pressures of up to 2 bar and temperatures of -40 ° C to 180 ° C, a reliable seal between two cylindrical or hollow cylindrical wall surfaces is ensured.
  • Such a sealing arrangement ensures this tightness over a long period of time.
  • Figure 1 shows a section of a side view of a Schubumiuftventils with a seal assembly according to the invention in a sectional view in the unloaded state.
  • FIG 2 shows the detail of the side view of the diverter valve with the inventive seal assembly according to Figure 1 in the loaded state with internal pressure.
  • the partial recirculation valve 10 shown in the figures consists of an electromagnetic circuit for actuation of an armature 12, which is connected to a closure body 14, so that the closure body is lifted from the valve seat 5 when the electromagnet is energized.
  • the closure body 14 In the non-energized state, the closure body 14 is pressed by means of a lo spring 15 on the valve seat, so that the suction and pressure sides are separated from each other. In this state, the pressure of the pressure side is passed through holes in the closure body 14 in an inner space 16 of the diverter valve 10, wodu ch a pressure equilibrium is established, which in a known manner enables a faster opening of the valve 15 10.
  • the inner space 16 of the valve 10 is delimited by a housing part 18, which surrounds the closure body 14 radially over an axial section changing with movement of the closure body 14.
  • a housing part 18 which surrounds the closure body 14 radially over an axial section changing with movement of the closure body 14.
  • the inner space 16 is bounded by a radially occidentalde disc 22 through the central opening 24 of the closure body 14 protrudes.
  • an external, the entire thrust reversing valve 10 limiting housing part 26 is additionally visible, via which the valve 10 can be attached to a channel.
  • the disc 22 has an annular projection 28 which is fastened between the outer housing part 26 and a short radially extending portion 29 of the inner space 16 delimiting the housing part 18 by means of clips or welding.
  • annular gap 30 is formed between the disk 22 and the closure body 14.
  • This gap 30 by means of a Lip seal 32 sealed.
  • This lip sealing ring 32 has a carrier part 34, with which the lip sealing ring 32 rests on an inner, radially extending wall surface 35 of the disc 22.
  • two legs 36, 38 extend approximately V-shaped, wherein the radially outer leg 36 is inclined at an angle of about 15 ° to the cylinder axis and the radially inner leg 38 is inclined by about 30 ° to the cylinder axis.
  • the end of the radially outer leg 36 abuts against a radially outer fixed hollow cylindrical wall surface 40 of the housing part 18, at the immediately adjacent to the end of the outer leg 36 of the assembled lip seal a shoulder 42 is formed, which is a displacement of this position during movement of the closure body 14 prevented. Accordingly, the end of the leg 36 is radially against a resulting from the formation of the shoulder 42 annular recess 44, which forms the hollow cylindrical wall surface in the present embodiment.
  • the lip seal 32 is made of a particularly lubricious material such as polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • a projection 48 is formed, which extends in the direction of the inner space 16 over about one third of the height of the lip seal ring 32.
  • a radially inner surface 50 of the projection 48 extends parallel to the closure body 14 in the cylinder axis of the valve 10, so that the gap 30 has a constant width.
  • a radially outer surface 52 of the projection 48 extends as well as the radially inner leg 38 of the lip seal 32 at an angle of about 30 ° to the cylinder axis, wherein between the leg 38 and the surface 52 in not inflated due to a pressure difference state of the lip seal 32 a Gap 54 is present.

Landscapes

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

Abstract

Des garnitures d'étanchéité pour des soupapes (10) dans des moteurs à combustion interne, comprenant une surface de paroi cylindrique creuse (40) fixe radiale extérieure, une surface de paroi cylindrique (46) radiale intérieure déplaçable par translation, une bague d'étanchéité à lèvre (32) qui présente une partie de support (34) ainsi qu'une branche radiale intérieure (38) qui s'étend à partir de la partie de support (34) et dont l'extrémité repose contre la surface de paroi cylindrique (46) et une branche radiale extérieure (36) qui s'étend à partir de la partie de support (34) et dont l'extrémité repose contre la surface de paroi cylindrique creuse (40) de sorte que la bague d'étanchéité à lèvre (32) sépare un espace intérieur (16) de la soupape (10) d'un espace extérieur (20) et entoure une surface de paroi (35) fixe qui s'étend radialement et entoure la surface de paroi cylindrique intérieure (46) et contre laquelle la partie de support (34) de la bague d'étanchéité à lèvre (32) repose axialement, sont connues. À pressions et températures élevées, la résistance à la déformation des bagues d'étanchéité à lèvre ne suffit souvent pas et des défauts d'étanchéité résultent. De ce fait, selon l'invention une saillie (48) contre laquelle la branche intérieure (38) de la bague d'étanchéité à lèvre (32) repose quand la branche intérieure radiale (38) est déformée est formée sur la surface de paroi (35) s'étendant radialement.
PCT/EP2012/066867 2011-09-28 2012-08-30 Garniture d'étanchéité pour une soupape d'un moteur à combustion interne WO2013045200A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011054003.2A DE102011054003B4 (de) 2011-09-28 2011-09-28 Ventil für eine Verbrennungskraftmaschine mit einer Dichtungsanordnung
DE102011054003.2 2011-09-28

Publications (1)

Publication Number Publication Date
WO2013045200A1 true WO2013045200A1 (fr) 2013-04-04

Family

ID=46851430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/066867 WO2013045200A1 (fr) 2011-09-28 2012-08-30 Garniture d'étanchéité pour une soupape d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102011054003B4 (fr)
WO (1) WO2013045200A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575622A (zh) * 2017-09-28 2018-01-12 贵州新安航空机械有限责任公司 一种增压器用泄压阀唇型组合密封结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014103750U1 (de) 2014-08-13 2015-11-16 Woco Industrietechnik Gmbh Ventil
DE102016226071A1 (de) 2016-12-22 2018-06-28 Continental Automotive Gmbh Ventil
DE102017223583A1 (de) * 2017-12-21 2019-06-27 Continental Automotive Gmbh Ventil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB860090A (en) * 1956-05-07 1961-02-01 Renault Improvements in and relating to sealing means
WO1994008159A1 (fr) 1992-10-05 1994-04-14 Martin Merkel Gmbh & Co. Kg Bague d'etancheite
WO1999053226A1 (fr) * 1998-04-10 1999-10-21 Furon Company Joint d'etancheite a levre radial
WO2007048828A1 (fr) * 2005-10-29 2007-05-03 Pierburg Gmbh Soupape de surpression destinee a des moteurs a combustion interne comportant un turbocompresseur
DE102009011938B3 (de) 2009-03-10 2010-09-09 Pierburg Gmbh Schubumluftventilvorrichtung für eine Brennkraftmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738512C2 (de) * 1987-11-13 1997-05-15 Ebern Fahrzeugtech Gmbh Dichtung
JP2005337440A (ja) * 2004-05-28 2005-12-08 Kayaba Ind Co Ltd シール構造及び油圧シリンダのシール構造
JP2009236177A (ja) * 2008-03-26 2009-10-15 Nok Corp 密封構造

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB860090A (en) * 1956-05-07 1961-02-01 Renault Improvements in and relating to sealing means
WO1994008159A1 (fr) 1992-10-05 1994-04-14 Martin Merkel Gmbh & Co. Kg Bague d'etancheite
WO1999053226A1 (fr) * 1998-04-10 1999-10-21 Furon Company Joint d'etancheite a levre radial
WO2007048828A1 (fr) * 2005-10-29 2007-05-03 Pierburg Gmbh Soupape de surpression destinee a des moteurs a combustion interne comportant un turbocompresseur
EP1941138B1 (fr) 2005-10-29 2010-03-10 Pierburg GmbH Soupape de surpression destinee a des moteurs a combustion interne comportant un turbocompresseur
DE102009011938B3 (de) 2009-03-10 2010-09-09 Pierburg Gmbh Schubumluftventilvorrichtung für eine Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575622A (zh) * 2017-09-28 2018-01-12 贵州新安航空机械有限责任公司 一种增压器用泄压阀唇型组合密封结构

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Publication number Publication date
DE102011054003A1 (de) 2013-03-28
DE102011054003B4 (de) 2017-03-16

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