EP3303872A1 - Contenant sous pression destiné notamment à un ensemble cylindre - Google Patents

Contenant sous pression destiné notamment à un ensemble cylindre

Info

Publication number
EP3303872A1
EP3303872A1 EP16721733.0A EP16721733A EP3303872A1 EP 3303872 A1 EP3303872 A1 EP 3303872A1 EP 16721733 A EP16721733 A EP 16721733A EP 3303872 A1 EP3303872 A1 EP 3303872A1
Authority
EP
European Patent Office
Prior art keywords
pressure vessel
cylinder unit
pressure container
enveloping body
filling
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
EP16721733.0A
Other languages
German (de)
English (en)
Inventor
Holger Kirchner
Thomas Meyer
Norbert Ackermann
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP3303872A1 publication Critical patent/EP3303872A1/fr
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
    • 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
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • 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
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/025—Elastomers
    • 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
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/08—Functional characteristics, e.g. variability, frequency-dependence pre-stressed

Definitions

  • Pressure vessel in particular for a cylinder unit
  • the invention relates to a pressure vessel according to the preamble of claim 1.
  • Enclosed gas masses are u. a. Used where a medium is to be pressurized and held, but must not be mixed with an open pressure fluid.
  • a common application is in piston-cylinder units such as vibration dampers.
  • vibration damper with an enclosed gas mass is known for example from US 3,294,391.
  • the enclosed gas mass serves to compensate for the volume of the plunger rod or the plunger immersed in the vibration damper.
  • a problem with such an enclosed gas mass is the fact that the gas diffuses from the enveloping body into the damping medium of the vibration damper through the wall of the enveloping body. If a certain gas outlet is reached, it is z. B. the vibration damper in its function or even disabled.
  • One way to reduce the described malfunction is to use certain filling gases such as nitrogen. But also nitrogen diffuses through the usual enveloping body, which often consist of a rubber material or elastomer, especially at higher temperatures.
  • DE 98 35 222 A1 describes a pressure vessel which is filled with at least one medium which is prestressed by a gas mass trapped in a shape-variable enveloping body, in particular for compensating the volume in a vibration damper, comprising a wall in which one is under pressure the gas is enclosed, wherein the wall of the enveloping body is at least partially formed of a gas-tight barrier layer and the wall is constructed in multiple layers.
  • the enveloping body should be as flexible as possible.
  • a support layer is used, which is assigned to the metal foil.
  • the base course is between see the metal foil and the inner material layer arranged.
  • the internal material layer is required, inter alia, for the welding process. Possible materials are, for example, PE, PP and PA in question.
  • the support layer can serve as a protective layer for the metal foil.
  • a seal welding method is proposed.
  • a filler is inserted, such. B. from DE10 2004 005 196 B4 is known.
  • the weldability of the filling body with the enveloping body is achieved primarily via a special shaping of the filling body in the area of the contact surface with the edge of the body.
  • the object of the present invention is to realize a pressure vessel which has sufficient strength even at higher temperatures.
  • Fig. 1 overall view of a pressure vessel
  • Fig. 2 filler as a single part
  • FIG. 1 shows in simplified form a pressure vessel 1, as it is known, for example, from FIG. B. is used in a memory or compensation room.
  • An exemplary application consists in a piston-cylinder unit in a chassis as a vibration damper or as Verstellaggregat to adjust the level of a vehicle body static or dynamic.
  • the pressure vessel 1 comprises an enveloping body 3 and a filling body 5.
  • the filling body 5 has a filling connection 7 to a gas filling system and a connection region 9, which is inserted in a peripheral edge 11 of the enveloping body. Dash-dotted lines extending in the longitudinal direction of the filling body are available for bending line 13 of the pressure vessel. 1
  • the peripheral edge 1 1 is formed by a welding area, which also covers the connection area 9 of the filling body 5.
  • the filler 5 is shown in Figure 2 in perspective view.
  • the wall of the enveloping body 3 is executed in four layers in this case.
  • the innermost layer 1 1 is formed by a plastic film, which is optimized in terms of weldability.
  • a so-called blend is used, for. B. a plastic-material mixture of PA6 and PA66.
  • the advantage is that this combination of materials is on the one hand particularly suitable for films and has a melting point which is higher than peak temperatures in a piston-cylinder unit.
  • a second film 17 of the enveloping body 3 is formed by a metallic material, for. As aluminum. Between the different foils 15; 17 is preferably carried out an adhesive layer. The metallic foil 17 effectively prevents the passage of gas from inside the pressure vessel 1.
  • a third film 19 is formed by a polyamide which is stretched in at least one direction to reduce the elongation of the material.
  • This so-called oriented polyamide forms a mechanical support layer for the metal foil 17.
  • Support layer is to be understood in the sense that a strain load, the z. B. starting from the inner welding film 15 is received by the support layer 19, so that the metal layer 17 is under no circumstances overloaded.
  • An outer film 21 is also preferably formed of polyamide and serves as a protective layer against the operating temperature on the outside of the pressure vessel 1, but also as a mechanical protective layer, for. B. due to a frictional load between the outer layer 21 and a pressure vessel receiving rigid container.
  • the filler 5 is also made of polyamide or copolyamide or copolymer.
  • the idea is that the inner film 15, which forms the welded connection and whose material selection is designed for the production of films, thus a comparatively tough base material preferred.
  • the filler 5, which is produced by means of a spraying process, should preferably consist of an easily flowing base material so that the spraying process takes place optimally and an injection mold is only exposed to a comparatively low load.
  • the materials for the filling body 5 and the inner film 15 are made of plastics, which have a comparable melting point. With the material combination of the filler 5 and the inner film 15 described above, this goal is achieved. Since both materials are based on a polyamide, the melting point of both materials is above about 130 ° C, the maximum operating temperature of the piston-cylinder unit.
  • the welding area 1 1 is generated by an ultrasonic welding process.
  • the filler has over Anschmelzstege 23, which extend in the longitudinal direction of the weld region 1 1.
  • This Anschmelzstege 23 serve to produce a manageable energy use a melt that connects the enveloping body 3 with the packing 5. In principle, one could do without the melt-on webs 23, but then the melt would have to be produced from the full body of the packing 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Contenant sous pression comprenant un corps d'enveloppement multicouche et un corps de remplissage, la la résistance thermique pouvant être accrue par un ajustement des matériaux du corps d'enveloppement et du corps de remplissage.
EP16721733.0A 2015-05-26 2016-04-25 Contenant sous pression destiné notamment à un ensemble cylindre Ceased EP3303872A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015209562.2A DE102015209562A1 (de) 2015-05-26 2015-05-26 Druckbehälter, insbesondere für ein Zylinder-Aggregat
PCT/EP2016/059162 WO2016188687A1 (fr) 2015-05-26 2016-04-25 Contenant sous pression destiné notamment à un ensemble cylindre

Publications (1)

Publication Number Publication Date
EP3303872A1 true EP3303872A1 (fr) 2018-04-11

Family

ID=55963312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16721733.0A Ceased EP3303872A1 (fr) 2015-05-26 2016-04-25 Contenant sous pression destiné notamment à un ensemble cylindre

Country Status (3)

Country Link
EP (1) EP3303872A1 (fr)
DE (1) DE102015209562A1 (fr)
WO (1) WO2016188687A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019218699A1 (de) 2019-12-02 2021-06-02 Zf Friedrichshafen Ag Druckmittelversorgungssystem, insbesondere für ein Fahrwerkssystem
DE102022208706A1 (de) 2021-10-01 2023-04-06 Zf Friedrichshafen Ag Verfahren zur Ermittlung der Niveaulage bei einem Fahrzeugaufbau

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294571A (fr) 1964-12-07 1965-04-12
DE19835222A1 (de) 1997-08-11 1999-02-18 Mannesmann Sachs Ag Druckbehälter mit einer eingeschlossenen Gasmasse
DE102004005196B4 (de) 2004-02-03 2007-03-29 Zf Friedrichshafen Ag Füllventil für einen Druckbehälter

Also Published As

Publication number Publication date
DE102015209562A1 (de) 2016-12-01
WO2016188687A1 (fr) 2016-12-01

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