WO2014056979A1 - Amortisseur de vibrations comportant un dispositif d'étanchage de piston flottant - Google Patents

Amortisseur de vibrations comportant un dispositif d'étanchage de piston flottant Download PDF

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Publication number
WO2014056979A1
WO2014056979A1 PCT/EP2013/071046 EP2013071046W WO2014056979A1 WO 2014056979 A1 WO2014056979 A1 WO 2014056979A1 EP 2013071046 W EP2013071046 W EP 2013071046W WO 2014056979 A1 WO2014056979 A1 WO 2014056979A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing ring
machine part
sealing
contact surface
separating piston
Prior art date
Application number
PCT/EP2013/071046
Other languages
German (de)
English (en)
Inventor
Wolfgang Böhler
Original Assignee
Trelleborg Sealing Solutions Germany 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 Trelleborg Sealing Solutions Germany Gmbh filed Critical Trelleborg Sealing Solutions Germany Gmbh
Priority to EP13777002.0A priority Critical patent/EP2906858A1/fr
Publication of WO2014056979A1 publication Critical patent/WO2014056979A1/fr

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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/368—Sealings in pistons
    • 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
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • 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
    • 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
    • F16J15/56—Other sealings for reciprocating rods

Definitions

  • the invention relates to a vibration damper with a
  • Trennkolbendichtungsan extract have long been an integral part of vibration, as used for example in vehicles as so-called shock absorbers.
  • Such Trennkolbendichtungsan extracten have a designed as a separating piston first machine part and designed as a cylinder second machine part, in which the separating piston is guided in a conventional manner along a movement axis slidably.
  • the separating piston serves to separate a gas space filled with high pressure from a pressure medium storage space of the cylinder.
  • the gas space may be filled with nitrogen (N2), carbon dioxide (CO2) or other suitable gas.
  • N2 nitrogen
  • CO2 carbon dioxide
  • oil or another suitable liquid pressure medium can be arranged in the pressure medium storage space.
  • a rubber-elastic sealing ring which is arranged in a groove of one of the two machine parts is used in practice.
  • the sealing ring lies with a sealing edge on a sealing surface of the other of the two machine parts sealingly.
  • the vibration damper according to the invention has a Trennkolbendichtungsan extract with a sealing ring, which has a nutgrund lake arranged holding portion and a head portion, which is provided with a sealing edge.
  • the holding portion of the sealing ring is arranged according to the invention held in the groove in the axial positive engagement or in the axial interference fit.
  • the sealing ring bears with its holding portion on the groove bottom of the groove with a contact surface, which is provided with indentations.
  • the indentations may in particular be annular and thus arranged circumferentially on the sealing ring. Dimensional tolerances of the two machine parts can be reliably compensated.
  • the head portion has - with respect to the holding portion - a neutral position in which the head portion is aligned with its central axis orthogonal to the axis of movement.
  • the sealing edge In the neutral position of the head section, the sealing edge has a first contact surface angle ⁇ which is assigned to the pressure medium storage space and which is greater than a second contact surface angle ⁇ facing the gas space.
  • the first contact surface angle ⁇ of the sealing edge is 30 ° to 70 ° and the second contact surface angle ß is 5 ° to 15 °.
  • the head portion is tiltably connected to the holding portion of the sealing ring and tilted by a sliding movement of the separating piston along the movement axis from its neutral position in two mutually opposing tilting directions relative to the holding portion of the sealing ring.
  • the head portion can thereby be folded alternately with respect to the holding portion of the sealing ring due to a given between the sealing edge and the sealing surface of a machine part with a periodic reciprocation of the separating piston in the cylinder between two Kippp sueden.
  • the center axis of the head section with the movement axis or with the other machine part in each case includes a (deflection) angle ⁇ deviating from the neutral position of less than 90 °.
  • a relative movement between the sealing edge and the associated sealing surface only takes place when the head portion of the sealing ring has reached its respective maximum tilted position relative to the holding portion, ie, its respective maximum deflection position relative to the holding portion.
  • a given between the sealing edge and the sealing surface static friction is therefore for the response of the Trennkolbendichtungsanowski extract (initially) without influence.
  • the response of the Trennkolbendichtungungsan angel can be improved overall in a structurally simple way.
  • the vibration damper according to the invention with the separating piston seal arrangement is particularly suitable for short-stroke applications and offers advantages especially in applications with higher and higher vibration frequencies.
  • Under Kurzhubanengine such applications of Trennkolbendichtungsan extract be understood in which an amplitude of the separating piston movement relative to the cylinder is at most 3 times the groove width of the groove.
  • the vibration damper is characterized by an improved response and is particularly suitable for mobile applications, for example in aircraft and / or motor vehicles.
  • the head portion of the sealing ring can be connected according to the invention, in particular via a material-weakened compared to the head portion mounting portion with the holding portion of the sealing ring.
  • the articulation of the head section on the holding section can thereby be realized in a simple manufacturing technology.
  • the attachment portion extends in the neutral position of the head portion preferably orthogonal to the axis of movement of the two machine parts.
  • the sealing ring in the region of its attachment portion preferably on both sides, be constricted.
  • the attachment portion thereby has a smaller width than the head portion. Due to the constriction or constrictions arise in cross section one or more lateral indentations of the sealing ring in the region of the attachment portion.
  • the indentations may in particular be rounded, i. concave, be executed. This offers manufacturing advantages.
  • the head portion of the sealing ring according to the invention preferably has an axial width which is 50% to 80% of the axial width of the holding portion of the sealing ring or the groove.
  • the head section of the sealing ring can be arranged at least in sections within the groove of the one machine part, without this being limited in its desired range of motion by a groove flank of the groove.
  • the sealing ring can thereby be secured even more reliably in the groove against undesired axial pressing out of the sealing ring from the groove.
  • Fig. 1 is a Trennkolbendichtungsanaku
  • Machine parts which are displaceable relative to one another and with a sealing ring which has a holding section arranged in a groove of one of the two machine parts and a head section hinged to the holding section with a sealing edge, with a head section arranged in neutral position, in fragmentary cross-section;
  • FIG. 3 the Trennkolbendichtungsan extract according to FIG. 1 in a
  • FIG. 4 shows a vibration damper with a separating piston seal arrangement according to FIG. 1, in a side view.
  • FIG. 1 shows a separating piston seal arrangement 10 for short-stroke applications with a first machine part 12 designed as a separating piston and a second machine part 14 designed as a cylinder.
  • the first machine part 12 is displaceably guided along a movement axis 16 in the second machine part 14.
  • Trennkoiben 16 a pressure medium storage space 18 of the second machine part 14 is separated from a pressure medium storage space 18 axially spaced gas space 20 of the second machine part 14.
  • a not closer reproduced gas such as nitrogen
  • a liquid pressure medium such as oil
  • a rubber-elastic deformable sealing ring 24 is arranged in a groove 22 of the first machine part 12.
  • the sealing ring 24 serves a pressure-tight sealing of the pressure medium storage space 18 with respect to the gas space 20.
  • the sealing ring 22 is thus formed as an outer sealing ring. It is understood, however, that the sealing ring 24 can also be arranged in a groove 22 of the second machine part 14 designed as a cylinder and thus designed as an inner sealing ring.
  • the sealing ring 24 has a nut ground person arranged holding portion 26, a material-weakened mounting portion 28 and a head portion 30.
  • the head portion 30 is provided with a sealing edge 32, via the sealing ring 24 is biased against a sealing surface 34 of the second machine part 14 in a sealing manner.
  • the holding portion 26 of the sealing ring 24 is held in the groove 22 in axial positive engagement, but may be disposed in the groove 22 but also in the axial interference fit.
  • the holding portion 26 of the sealing ring is located on the groove bottom 36 of the groove 22 with a contact surface 38, which is provided with circumferential (annular) rounded indentations 40.
  • the recesses 40 serve primarily a tolerance compensation between the two machine parts 12, 14th
  • the sealing ring 24 is constricted laterally on both sides of the area of the material-weakened fastening section 28.
  • the sealing ring 24 has on both sides lateral annular indentations 40 ' , which are executed here rounded.
  • the recesses 40, 40 ' may also have a different shape.
  • the head portion 30 of the sealing ring 24 is partially disposed in the embodiment shown within the groove 22 of the first machine part 12 and thus on both sides partially covered by groove flanks 42 of the groove 22 in the axial direction.
  • the head portion 30 of the sealing ring 24 has an axial width b, which is approximately 75% of the axial width b 'of the holding portion 26 and the groove 22 in the embodiment shown.
  • the head section 30 may in principle have an axial width b which corresponds to approximately 50% to 80% of the width b 'of the holding section 26.
  • the head section 30 is tiltably connected to the holding section 26 via the material-weakened attachment section 28 connected.
  • the head portion 30 is tiltable about an annular tilting axis designated 44 from its shown neutral position in opposite Kippraumen 46, 48 relative to the holding portion 26 of the seal ring 24 tilted or hinged. In the neutral position, the center axis 50 of the head portion 30 is aligned orthogonal to the movement axis 16 of the two machine parts 12, 14.
  • the sealing edge 32 has a first contact surface angle ⁇ facing the pressure medium storage space 18 and a second contact surface angle ⁇ facing the gas space 20.
  • the first contact surface angle ⁇ is greater than the second contact surface angle ß for the purpose of an effective sealing effect.
  • the smaller second contact surface angle ⁇ ensures a sufficiently high pressure medium remindschleppbox the sealing ring 24.
  • the first contact surface angle ⁇ of the sealing edge 32 is presently about 55 °, but can be between 30 ° to 70 °.
  • the second contact surface angle ⁇ of the sealing edge 32 is about 10 0 and may have a value between 5 ° and a maximum of about 15 °.
  • the head portion 30 was located at the beginning of the sliding movement of the separating piston by its contact with the sealing surface of the cylinder directly opposite the holding portion 26 of Tilted sealing ring in a first tilted position relative to the holding portion.
  • the central axis 50 of the head portion 30 includes in the first tilted position shown with the movement axis 16 and the second machine part 14, a deflection angle ⁇ with ⁇ ⁇ 90 °, here about 80 °, a.
  • ⁇ deflection angle
  • FIG. 3 the separating piston seal arrangement 10 is shown in a displacement movement of the separating piston relative to the second machine part 14 in a second movement direction 52 'opposite to the first movement direction 52 (FIG. 2).
  • the head section 30 is tilted relative to the holding section of the sealing ring in the tilting direction 48 opposite to the tilt direction 48 beyond the neutral position (FIG. 1) in its second tilting position.
  • the central axis 50 of the head portion 30 is angled relative to the movement axis 16 of the two machine parts 12, 14 and includes with the movement axis or the second machine part a deflection angle ⁇ of less than 90 °, here about 75 °, a.
  • the head portion 30 of the sealing ring 24 does not touch the pressure-medium-side groove flank 42 of the groove 22.
  • the sealing edge 32 of the sealing ring 24 is sealingly against the second machine part 14.
  • FIG. 4 shows a vibration damper 100 with a piston rod 102 and a separating piston seal arrangement 10 explained above.
  • the pressure medium here oil
  • the displaceably mounted separating piston compresses the gas cushion (for example nitrogen) arranged in the gas space 20 of the cylinder.
  • the gas cushion for example nitrogen

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un amortisseur de vibrations comportant un dispositif d'étanchage de piston flottant (10) pour des applications à faible course.
PCT/EP2013/071046 2012-10-09 2013-10-09 Amortisseur de vibrations comportant un dispositif d'étanchage de piston flottant WO2014056979A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13777002.0A EP2906858A1 (fr) 2012-10-09 2013-10-09 Amortisseur de vibrations comportant un dispositif d'étanchage de piston flottant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012218358.2A DE102012218358B4 (de) 2012-10-09 2012-10-09 Trennkolbendichtungsanordnung sowie Schwingungsdämpfer
DE102012218358.2 2012-10-09

Publications (1)

Publication Number Publication Date
WO2014056979A1 true WO2014056979A1 (fr) 2014-04-17

Family

ID=49378252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/071046 WO2014056979A1 (fr) 2012-10-09 2013-10-09 Amortisseur de vibrations comportant un dispositif d'étanchage de piston flottant

Country Status (3)

Country Link
EP (1) EP2906858A1 (fr)
DE (1) DE102012218358B4 (fr)
WO (1) WO2014056979A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014007617A1 (de) * 2014-05-26 2015-11-26 Carl Freudenberg Kg Dicht- oder Abstreifring
DE102014217392A1 (de) 2014-09-01 2016-03-03 Trelleborg Sealing Solutions Germany Gmbh Dichtungsanordnung mit druckaktivierbarem Vorspannelement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823261A1 (de) * 1988-07-08 1990-01-11 Knorr Bremse Ag Einseitig druckbeaufschlagbarer dichtungsring zum abdichten zweier zueinander verschieblicher teile
GB2311584A (en) * 1996-03-29 1997-10-01 Joucomatic Seal for piston or piston rod
US20050126186A1 (en) * 2003-12-11 2005-06-16 Helix Technology Corporation Axial loaded seal system with a static L-seal
DE102004021589A1 (de) * 2004-05-03 2005-12-01 Continental Aktiengesellschaft Aufgepresster Kolbenring
DE102008040996A1 (de) * 2008-08-05 2010-02-11 Robert Bosch Gmbh Dichtungsanordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2104859A1 (de) 1971-02-02 1972-08-17 Knorr Bremse Gmbh Dichtungsanordnung fur zueinander relativ verschiebhche Teile
DE29522117U1 (de) 1995-01-05 1999-10-21 Hecker Werke Gmbh & Co Kg Spez Dichtung zwischen zwei axial zueinander beweglichen Bauteilen
DE20109562U1 (de) 2001-06-07 2002-05-02 Dichtelemente Hallite Gmbh Dichtungsring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823261A1 (de) * 1988-07-08 1990-01-11 Knorr Bremse Ag Einseitig druckbeaufschlagbarer dichtungsring zum abdichten zweier zueinander verschieblicher teile
GB2311584A (en) * 1996-03-29 1997-10-01 Joucomatic Seal for piston or piston rod
US20050126186A1 (en) * 2003-12-11 2005-06-16 Helix Technology Corporation Axial loaded seal system with a static L-seal
DE102004021589A1 (de) * 2004-05-03 2005-12-01 Continental Aktiengesellschaft Aufgepresster Kolbenring
DE102008040996A1 (de) * 2008-08-05 2010-02-11 Robert Bosch Gmbh Dichtungsanordnung

Also Published As

Publication number Publication date
DE102012218358A1 (de) 2014-04-10
DE102012218358B4 (de) 2019-10-24
EP2906858A1 (fr) 2015-08-19

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