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WO2014086455A1 - Dispositif pour raccorder un capteur haute pression - Google Patents

Dispositif pour raccorder un capteur haute pression Download PDF

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Publication number
WO2014086455A1
WO2014086455A1 PCT/EP2013/003379 EP2013003379W WO2014086455A1 WO 2014086455 A1 WO2014086455 A1 WO 2014086455A1 EP 2013003379 W EP2013003379 W EP 2013003379W WO 2014086455 A1 WO2014086455 A1 WO 2014086455A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
sealing ring
component
designed
components
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
PCT/EP2013/003379
Other languages
German (de)
English (en)
Inventor
Thomas Baur
Bernd Buchauer
Felix Most
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.)
Mercedes Benz Group AG
Original Assignee
Daimler 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 Daimler AG filed Critical Daimler AG
Publication of WO2014086455A1 publication Critical patent/WO2014086455A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/008—Branching pipes; Joining pipes to walls for connecting a measuring instrument

Definitions

  • the invention relates to a device for connecting a high-pressure sensor to a high-pressure volume according to the closer defined in the preamble of claim 1.
  • Gas sensor which is sealed by a plurality of sealing rings, which are formed compressed in both the axial and in the radial direction.
  • the structure is comparatively complex and can only ensure a seal against the medium in the volume.
  • water or the like can enter from the opposite side in there or not poorly sealed sensor.
  • This is particularly critical when different materials are used, for example, a light metal or a carbon fiber reinforced material on the one hand and a connecting element made of a steel alloy, a stainless steel or the like on the other side. Due to the different materials are used, for example, a light metal or a carbon fiber reinforced material on the one hand and a connecting element made of a steel alloy, a stainless steel or the like on the other side. Due to the different materials are used, for example, a light metal or a carbon fiber reinforced material on the one hand and a connecting element made of a steel alloy, a stainless steel or the like on the other side. Due to the different materials are used, for example, a light metal or a carbon fiber reinforced material on the one hand and a connecting element made of a steel alloy, a stainless steel or the like on the other side. Due to the different materials are used, for example, a light metal or a carbon fiber reinforced material on the one hand and a connecting element made
  • Electronegativity values can then, especially when moisture penetrates, which serves as the electrolyte, lead to an electrochemical corrosivity between the two different materials.
  • the object of the invention is therefore to provide a device for connecting a high-pressure sensor to a high-pressure volume, which the avoids the above-mentioned disadvantages and ensures a simple, safe and reliable construction.
  • the device according to the invention is a with a high pressure sensor
  • Sealing rings of an elastic material which are pressed in the assembled state sealingly between the first and the second component, are provided.
  • one of the components has an internal thread and one of the components has a corresponding external thread.
  • the at least two sealing rings are arranged, at least in the mounted state, on the respective opposite side of the thread.
  • the sealing ring on the side facing the volume is formed resistant to the medium in the volume, while the at least one other sealing ring against occurring in the environment media, especially water, resistant is.
  • Such a seal with two different sealing rings allows, for example, in the sealing of a
  • Hydrogen volume facing sealing ring in such a way that it is highly resistant to hydrogen formed.
  • it can be made of PU or
  • the other sealing ring can be formed resistant to just these media, for example, a silicone rubber or fluoro-silicone rubber.
  • the first seal then takes over the actual sealing against the gas under high pressure, while the other sealing ring takes over the sealing of the connection, namely the thread against environmental influences.
  • Threaded steel or stainless steel in a tank, preferably a hydrogen tank, made of aluminum and / or carbon fiber reinforced plastic are screwed.
  • the sealing ring which is resistant to the media occurring in the environment, to be concavely curved in cross section at least on its side facing the one component.
  • a concave curvature in the region of the abutment against a sealing surface makes it possible, in particular if the cross section in the region of the concave curvature is mirror-symmetrical to a mirror axis running centrally to the cross section and parallel to the axis of the thread, despite a radial direction or a directional component occurring in the radial direction
  • the sealing ring which is resistant to the media occurring on its side arranged in the axial direction opposite the region with the concave curvature has a sealing lip has, which points in the intended installed state of the side of the axis of the thread to the outside.
  • a sealing lip can also prevent the ingress of water safely and reliably, as they occur from the outside
  • the sealing ring which is resistant to the media occurring in the environment is ideally designed such that it has the sealing lip at one axial end and the concave, in particular mirror-symmetrical, at its other axial end , Cross-section.
  • sealing ring As an alternative to such a complexly shaped sealing ring would of course also a simple O-ring, preferably made of fluoro-silicone rubber, possible, which is also, on all sides, concave and mirror-symmetrical.
  • the occurring media resistant sealing ring is formed radially inside the sealing lip in the mounted state not over the entire circumference to a sealing surface fitting.
  • the material in the radial direction within the sealing lip may, for example, have a plurality of grooves or openings, so that it does not bear sealingly on a sealing surface over the entire circumference.
  • the seal in this area takes over the sealing lip, which has corresponding outward and seals in the usual way. If there is now an undesired but possibly safety-critical leak in the area of the other sealing ring sealing the volume, then the medium escaping from the volume, for example hydrogen, can penetrate approximately unimpeded through the threads screwed into one another and reaches the area in the area against that in the surroundings occurring media resistant sealing ring whose
  • the medium can pass into the region directly below the sealing lip. From a corresponding overpressure then the sealing lip is raised, so as to ensure an outlet of the pressurized medium, such as hydrogen, to the outside.
  • the device thus also serves as a safety valve, which from a certain overpressure, namely whenever the sealing ring which seals the volume fails, the medium can be blown outwards by allowing the sealing ring which is resistant to the media occurring in the environment, for example, by the embodiment described above, to permit a deliberate leak at a certain overpressure.
  • the resistant to the media occurring in the environment sealing ring is arranged in a sealing gap between the first and the second component, which is designed so that it expanded in the radial direction outside of the sealing ring in the assembled state, at least in one section.
  • Such an extension of the sealing gap outside the sealing ring in the mounted state can be realized, for example, by a conical configuration of the sealing gap, so that it expands continuously, for example, to the outside.
  • a stop element for limiting the axial travel of the components against each other during screwing is arranged.
  • a stop element makes it possible to clamp the sealing rings only to a defined deformation and thereby to prevent damage to the sealing rings, for example, by over-tightening the two components via their threads against each other.
  • Such a stop element may for example be integrated into the component so as to be available safely and reliably and without it being lost during assembly.
  • the stop element is designed as an annular element, preferably made of a plastic, which is on / in one of the components up / inserted. Such a plugged or
  • Inserted stop element can simultaneously ensure, in addition to the formation of a stop element, that in the area in which the stop between the two components takes place, no damage to the components occurs.
  • the device can be mounted and disassembled almost as often without a
  • plastic stop element can be easily replaced.
  • the component with the external thread in its in the assembled state facing the other component area has a threadless extension following the external thread, which in particular as a stop element or for receiving the
  • annular stop element is formed.
  • Such an extension of the thread or component without thread is ideally suited to form such a stop or iststecken an annular stop element, such as plastic, on it. It can be easily and efficiently manufactured during the production of the thread.
  • the fact that the section is unthreaded ensures a plane bearing surface of the section, especially if it is itself formed as a stop element, whereby a secure and reliable stop over the entire peripheral surface can be realized away. Damage to the opposite surface, which is ideally planar in this case, can thus be almost excluded.
  • the device is particularly suitable for connecting a high-pressure sensor to a hydrogen system, as has already been indicated above.
  • a high-pressure sensor to a hydrogen system
  • a good seal with respect to the hydrogen is accordingly important, which can preferably be achieved by a seal having a very well resistant to hydrogen material.
  • a seal will typically be quite unstable to water, so that in the device according to the invention via a different seal, a seal against water and other media occurring in the environment takes place.
  • the tanks or fittings used for the high pressure hydrogen are typically aluminum and / or carbon fiber reinforced plastics, it is critical that the seal against the ambient media, especially water, be extremely good at preventing any electrolyte between the threads and thereby safely and reliably prevent contact corrosion.
  • a correspondingly good seal then allows the use of, for example, stainless steel in the component, which is screwed into the other component, for example made of aluminum, and which corresponds with the high-pressure sensor accordingly.
  • the structure is simple, efficient, safe and reliable, in particular also, since it offers the possibility of integrating an overpressure safety device into the system, so that it is particularly suitable for a fuel cell system, especially for a
  • Fuel cell system used to provide electrical power, in particular electrical drive power, used in a vehicle are correspondingly high safety requirements in a simple, compact and lightweight design, which are mandatory due to the use in a vehicle. All these requirements can be achieved by the invention
  • Fulfill device ideally.
  • Fig. 1 is a sectional view through a device according to the invention in one
  • FIG. 2 shows a detail of the representation analogous to FIG. 1 in an alternative
  • FIG. 3 shows a detail of the illustration analogous to FIG. 2 in a further alternative embodiment
  • FIG. 4 shows two further alternative embodiments of a detail from the device analogous to FIG. 1; FIG. and
  • Fig. 5 shows an alternative embodiment of a sealing ring.
  • FIG. 1 In the illustration of Figure 1 is a sectional view through a device 1 for connecting a principle indicated high-pressure sensor 2 to a below
  • High-pressure standing volume 3 for example, a compressed gas storage for
  • the device 1 consists essentially of a first component 4, which is connected to the high-pressure sensor 2
  • a second component 5 which corresponds to the volume 3, which in particular a connecting piece, for example a
  • High pressure hydrogen tanks or the like forms or is part of such.
  • a sealing ring 8 is arranged in the first component 4 in the Substantial annular recess 7, in which a sealing ring 8 is arranged.
  • This sealing ring 8 is designed to be resistant to the medium in the volume 3, that is to say relative to the hydrogen, as far as this is even possible with hydrogen.
  • a suitable material for such a comparatively resistant to hydrogen continuously formed sealing ring 8 may be for example TPU.
  • a threadless extension 9 is formed following the external thread 6 which is applied to the first component 4 and which faces the second component 5 on the side facing the second component 5 most protruding part of the first component 4 forms and thus can serve as a stop element. Characterized in that the threadless extension 9 has no thread, its end can be formed flat, so that it cooperates with a likewise plan trained sealing surface 10, without that during assembly and subsequent disassembly a strong
  • the stop element 9 may have a radially inwardly facing projection 11, so as to prevent the sealing ring 8 from falling out before mounting.
  • sealing ring 8 In addition to this sealing of the device 1 against the hydrogen by means of the sealing ring 8 must now also be provided for sealing against media occurring in the environment, in particular water, especially since typically the first component 4 is formed of a stainless steel, and the second component. 5
  • annular recess 12 is formed, in which one in relation to those in the environment
  • This sealing ring 13 may for example be designed as an O-ring. It may preferably be formed of silicone rubber or a fluoro-silicone rubber, in order to ensure a correspondingly good resistance to the media of the environment, in particular water,
  • the threadless extension 9 is designed here with a significantly smaller diameter than the basic diameter of the external thread. This area is then a separate annular
  • Stop element 15 which is preferably formed of a plastic material, placed.
  • This annular stop member 15 takes on the supporting forces and ensures a stop which prevents excessive squeezing of the sealing ring 8 safely and reliably. At the same time it avoids damage to the planar sealing surface 10 or the surface of the first component 4 when screwing due to its design made of plastic material, as impressions, which are caused in particular as a result of a repeated screwing in the surfaces safely through the annular stop member 15 made of a plastic material and reliably prevented. If the annular stop element 15 made of plastic after repeated assembly and disassembly be worn or damaged, then it can be easily replaced with a new, which can be plugged into the threadless extension 9 in a very simple manner.
  • Stop element 15 made of a plastic material is formed in this embodiment with a slightly larger wall thickness, so that the threadless extension 9 between the sealing ring 8 and the annular stop member 15 can be omitted entirely. This reduces the risk that a gap results due to tolerances on the sealing base, in which the sealing ring 8 could be extruded. This would have a damage of the sealing ring and a deterioration of the seal, at the latest after another reassembly, the result.
  • FIG. 4 again a detail from the device 1 is taken up analogously to the representation in FIG.
  • the section essentially shows the area around the sealing ring 13, wherein above a central axis 16 of the thread 6 another variant embodiment is shown as below this axis 16.
  • Both design variants have a much thinner shoulder 14 in the radial direction compared to the illustration in FIG.
  • a sealing gap 17 between the first component 4 and the second component 5, in which the sealing ring 13 is arranged, is in both embodiments designed so that it expands at least partially outside of the sealing ring 13 in its intended use.
  • the extension takes place via at least one radially inwardly outwardly extending channel 18, which is arranged in the first component 4, and which is designed to be open to the other component 5.
  • One or more such channels 18 could be arranged both in the component 4 and in the component 5 or in both components 4, 5. If there is now an overpressure in the region of the thread 6, because, for example, hydrogen has leaked through the sealing ring 8 or the sealing ring 8 is damaged accordingly, then the overpressure will expand the sealing ring 13 to the outside, so that the sealing ring 13 in the radial direction to the outside moved, for example, in the dashed position shown. He releases at least a portion of the channel 18, so that through this channel 18, the hydrogen can flow out and the pressure between the components 4, 5 is reduced. As a result, the safety of the device 1 can be increased accordingly.
  • FIG. 5 another possible embodiment of a sealing ring 13 for sealing the components 4, 5 is shown relative to media occurring in the environment.
  • the sealing ring 13 comprises a sealing lip 19, which
  • the second component 5 faces, and then the first component 4 facing the end with a concave curvature 20, which is preferably mirror-symmetrical to a mirror axis which extends in the axial direction and is arranged parallel to the axis 16 of the thread 6.
  • This exemplary mounting direction of the sealing ring 13 could just as well be reversed, so that the sealing lip 19 in the first component 4 and the concave curvature 20 faces the second component 5.
  • the sealing ring 13 is typically installed so that a drainage of any penetrating liquid along the sealing lip 19 by gravity is possible. This preferred mounting position is shown in Figure 4 accordingly.
  • the concave curvature 20 allows the sealing ring 13, for example, at a
  • the material of the sealing ring 13 is formed radially inside the sealing lip 19 so that this alternately consists of projections 21 and grooves 22 so that pressurized hydrogen in the region of the thread 6 lift the sealing lip 19 and flow out below the sealing lip 19 therethrough can.
  • silicone rubber or preferably fluoro-silicone rubber, for example may in turn be used.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gasket Seals (AREA)

Abstract

L'invention concerne un dispositif (1) pour raccorder un capteur haute pression (2) à un volume (3) se trouvant sous haute pression, comportant un premier composant (4) correspondant avec le capteur haute pression (2) et un deuxième composant (5) correspondant avec le volume (3), avec au moins deux bagues d'étanchéité (8, 13) en un matériau élastique, lesquelles, à l'état monté, sont serrées entre le premier composant (4) et le deuxième composant (5). L'invention est caractérisée en ce qu'un des composants (5) est doté d'un filet femelle et un des composants (4) d'un filet mâle correspondant, lesdites au moins deux bagues d'étanchéité (8, 13) se trouvant respectivement à l'état monté du côté opposé des filets (6).
PCT/EP2013/003379 2012-12-04 2013-11-08 Dispositif pour raccorder un capteur haute pression Ceased WO2014086455A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012023677.8 2012-12-04
DE102012023677.8A DE102012023677A1 (de) 2012-12-04 2012-12-04 Vorrichtung zum Anschließen eines Hochdrucksensors

Publications (1)

Publication Number Publication Date
WO2014086455A1 true WO2014086455A1 (fr) 2014-06-12

Family

ID=49554202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/003379 Ceased WO2014086455A1 (fr) 2012-12-04 2013-11-08 Dispositif pour raccorder un capteur haute pression

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DE (1) DE102012023677A1 (fr)
WO (1) WO2014086455A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014010090B4 (de) 2014-07-08 2023-03-02 Cellcentric Gmbh & Co. Kg Vorrichtung zum Verbinden von gasführenden Bauteilen
DE102014017418B4 (de) 2014-11-25 2020-06-10 Daimler Ag Dichtungssystem und Verwendung eines solchen
DE102020121981A1 (de) 2020-08-21 2022-02-24 Endress+Hauser SE+Co. KG Druckmessgerät zur Messung eines Druckes

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192193A (en) * 1979-02-16 1980-03-11 General Signal Corporation Liquid filled pressure gauge
FR2681396A1 (fr) * 1991-09-16 1993-03-19 Freudenberg Piece d'etancheite statique a usages repetes.
JPH07311109A (ja) * 1994-05-19 1995-11-28 Hitachi Constr Mach Co Ltd 差圧センサ
US5785082A (en) * 1995-01-17 1998-07-28 Superior Valve Company In-line fuel fill valve
US20040182705A1 (en) 2003-01-31 2004-09-23 Ngk Spark Plug Co., Ltd. Gas sensor
US20110165488A1 (en) * 2010-03-10 2011-07-07 Ford Global Technologies, Llc Fuel cell system and heated pressure sensor
US20110247431A1 (en) * 2010-04-07 2011-10-13 Daniel Ervin Moldenhauer Cartridge Flow Transducer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192193A (en) * 1979-02-16 1980-03-11 General Signal Corporation Liquid filled pressure gauge
FR2681396A1 (fr) * 1991-09-16 1993-03-19 Freudenberg Piece d'etancheite statique a usages repetes.
JPH07311109A (ja) * 1994-05-19 1995-11-28 Hitachi Constr Mach Co Ltd 差圧センサ
US5785082A (en) * 1995-01-17 1998-07-28 Superior Valve Company In-line fuel fill valve
US20040182705A1 (en) 2003-01-31 2004-09-23 Ngk Spark Plug Co., Ltd. Gas sensor
US20110165488A1 (en) * 2010-03-10 2011-07-07 Ford Global Technologies, Llc Fuel cell system and heated pressure sensor
US20110247431A1 (en) * 2010-04-07 2011-10-13 Daniel Ervin Moldenhauer Cartridge Flow Transducer

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