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WO2008098585A1 - Soupape électromagnétique pour un système de pile à combustible - Google Patents

Soupape électromagnétique pour un système de pile à combustible Download PDF

Info

Publication number
WO2008098585A1
WO2008098585A1 PCT/EP2007/001225 EP2007001225W WO2008098585A1 WO 2008098585 A1 WO2008098585 A1 WO 2008098585A1 EP 2007001225 W EP2007001225 W EP 2007001225W WO 2008098585 A1 WO2008098585 A1 WO 2008098585A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
electromagnetic valve
volume
block
sealing elements
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/EP2007/001225
Other languages
German (de)
English (en)
Inventor
Thomas Baur
Matthias Jesse
Dietmar Mirsch
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
Ford Global Technologies LLC
Original Assignee
Daimler AG
Ford Global Technologies LLC
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, Ford Global Technologies LLC filed Critical Daimler AG
Priority to DE112007003342T priority Critical patent/DE112007003342A5/de
Priority to PCT/EP2007/001225 priority patent/WO2008098585A1/fr
Publication of WO2008098585A1 publication Critical patent/WO2008098585A1/fr
Anticipated expiration legal-status Critical
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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0686—Braking, pressure equilibration, shock absorbing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates to an electromagnetic valve for a fuel cell system having the features of the preamble of patent claim 1.
  • so-called cartridge valves are used in connection with fuel cell systems, which consist of a valve block which has a fit for receiving a valve insert comprising the valve mechanism. Between the valve block and the valve insert a plurality of sealing elements are arranged around a common axis such that the valve insert is mounted floating with distance to the valve block and the sealing elements connected to a valve inlet first volume and connected to a valve outlet second volume in the fit between the valve block and Form valve insert.
  • the disadvantage is that the pressure changes occurring when switching the valve at the valve inlet or valve outlet generally lead to an undesirable deflection or position change of the valve insert within the fit of the valve block in the direction of the common axis.
  • the valve insert is supported within the fitting by means of rubber dampers of sufficient hardness.
  • the electromagnetic valve for a fuel cell system includes a valve block having a fit for a valve core. Between the valve block and the valve insert a plurality of sealing elements are arranged around a common axis such that the valve insert is mounted floatingly spaced from the valve block and the sealing elements connected to a valve inlet first volume and connected to a valve outlet second volume in the fit between the valve block and Form valve insert.
  • the pressure-effective cross sections of the sealing elements are substantially equal.
  • the pressure forces acting in the direction of the common axis on the valve insert essentially cancel each other independently of the switching state of the valve. A occurring during switching of the valve in the direction of the common axis deflection of the valve core is largely suppressed in this way, which makes the use of soft vibration dampers correspondingly high internal damping possible.
  • the sealing element itself may have a higher hardness compared to the vibration element, so that a use of the valve is also possible in connection with high pressures, such as occur when used as a shut-off valve or the like for a high-pressure tank.
  • the sealing element is, for example, a conventional O-ring made of hard rubber, PTFE or another pressure-resistant material.
  • the vibration damper which is arranged for damping the switching noise in the direction of the common axis of the valve insert at a suitable location between the valve core and the valve block, can be designed for the sake of simplicity as an elastically deformable O-ring.
  • Suitable materials are, for example, soft rubber, silicone rubber or other elastomeric materials with high internal damping.
  • the vibration damper is segmented into individual buffer elements which are distributed around the common axis of the valve.
  • an improved decoupling of the valve insert relative to the valve block can be achieved. This is especially true in spherical design of the buffer elements.
  • a filter element associated with the valve inlet is provided within the first volume.
  • the filter element can be a particle filter, for example a textile tile, and / or a chemical filter based on the use of activated carbon or the like.
  • Fig. 2 shows an embodiment of the electromagnetic valve according to the invention in a cross-sectional view.
  • Fig. 1 shows a cross-sectional view of a conventional electromagnetic valve, as it is used, inter alia, in fuel cell systems.
  • the valve 10 shown in Fig. 1 consists of a valve block 11 made of stainless steel or aluminum, which has a fitting 12 for receiving a valve core 13. Between the valve block 11 and the valve core 13 a plurality of sealing elements 14 are arranged about a common axis 15 such that the valve core 13 is floatingly mounted at a distance from the valve block 11 and the sealing elements 14 connected to a valve inlet 16 first volume V 1 and one with a Valve outlet 17 connected second volume V 2 in the fit 12 between the valve block 11 and valve insert 13 form.
  • the valve core 13 has an easily produced cylindrical shape, so that the common axis 15 coincides with the cylinder axis of the valve core 13.
  • the sealing elements 14 are arranged concentrically with respect to the cylinder axis.
  • the different diameters D seal , D ' seal the sealing elements 14 and the resulting different pressure-effective cross sections lead to open and close the arranged in the valve core 13 valve mechanism 20 to an undesirable deflection or position change of the valve core 13 within the fit 12 of the valve block 11 in Direction of the common axis 15.
  • the valve core 13 is supported within the fitting 12 by means of rubber dampers 21.
  • Fig. 2 shows an embodiment of the electromagnetic valve according to the invention to circumvent this problem.
  • valve 30 according to the invention differs from the valve 10 shown in FIG. 1, in that the diameter D seal and thus the pressure-effective cross sections of the sealing elements 14 are essentially the same.
  • valve mechanism 20 communicates with the valve inlet 16 or valve outlet 17 via a plurality of openings which are arranged in the outer circumference of the valve insert 13.
  • the sealing elements 14 have a higher hardness compared to the vibration dampers 21.
  • the sealing elements 14 are conventional O-rings made of hard rubber, PTFE or other pressure-resistant material. The O-rings each sit in a groove extending along the outer circumference of the valve core 13.
  • the vibration damper 21 is segmented into individual spherical buffer elements, which are distributed around the common axis 15.
  • a filter element 34 assigned to the valve inlet 16 is provided within the first volume V 1 .
  • the filter element 34 is it is a particle filter, for example a textile fleece, and / or a chemical filter based on the use of activated carbon or the like.
  • valve 30 For venting the valve 30 adjacent to the first volume V 1 and / or to the second volume V 2 to a pressure equalization chamber, which is connected via a bore extending in the valve block 11 bore 35 with the outside atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne une soupape électromagnétique pour un système de pile à combustible, avec un bloc de soupape (11) qui présente un ajustement (12) pour un insert de soupape (13). Plusieurs éléments d'étanchéité (14) sont disposés autour d'un axe commun (15) entre le bloc de soupape (11) et l'insert de soupape (13) de telle sorte que l'insert de soupape (13) est monté à distance du bloc de soupape (11), et que les éléments d'étanchéité (14) forment, dans l'ajustement (12) entre le bloc de soupape (11) et l'insert de soupape (13), un premier volume (V<SUB>1</SUB>) relié à une entrée de soupape (16) et un deuxième volume (V<SUB>2</SUB>) relié à une sortie de soupape (17). Selon l'invention, les sections créant une pression des éléments d'étanchéité (14) sont sensiblement identiques.
PCT/EP2007/001225 2007-02-13 2007-02-13 Soupape électromagnétique pour un système de pile à combustible Ceased WO2008098585A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112007003342T DE112007003342A5 (de) 2007-02-13 2007-02-13 Elektromagnetisches Ventil für ein Brennstoffzellensystem
PCT/EP2007/001225 WO2008098585A1 (fr) 2007-02-13 2007-02-13 Soupape électromagnétique pour un système de pile à combustible

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/001225 WO2008098585A1 (fr) 2007-02-13 2007-02-13 Soupape électromagnétique pour un système de pile à combustible

Publications (1)

Publication Number Publication Date
WO2008098585A1 true WO2008098585A1 (fr) 2008-08-21

Family

ID=38564330

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/001225 Ceased WO2008098585A1 (fr) 2007-02-13 2007-02-13 Soupape électromagnétique pour un système de pile à combustible

Country Status (2)

Country Link
DE (1) DE112007003342A5 (fr)
WO (1) WO2008098585A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1917261A1 (de) * 1969-04-03 1970-10-08 Hamburger Flugzeugbau Gmbh Auswechselbares Ventil,insbesondere fuer Luftfahrzeuge
DE4030963A1 (de) * 1990-10-01 1992-04-02 Bosch Gmbh Robert Elektromagnetbetaetigtes ventil
EP0676548A1 (fr) * 1994-03-11 1995-10-11 Voac Hydraulics Boras Ab Valve enfichable
EP0766029A2 (fr) * 1995-09-27 1997-04-02 HYDRAULIK-RING ANTRIEBS- UND STEUERUNGSTECHNIK GmbH Electrovanne et procédé de fabrication
WO2006114447A1 (fr) * 2005-04-28 2006-11-02 Bosch Rexroth Ag Soupape a cartouche electropneumatique, utilisee en particulier comme soupape pilote avec une soupape pneumatique de structure etroite pour former une unite a soupapes compacte

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1917261A1 (de) * 1969-04-03 1970-10-08 Hamburger Flugzeugbau Gmbh Auswechselbares Ventil,insbesondere fuer Luftfahrzeuge
DE4030963A1 (de) * 1990-10-01 1992-04-02 Bosch Gmbh Robert Elektromagnetbetaetigtes ventil
EP0676548A1 (fr) * 1994-03-11 1995-10-11 Voac Hydraulics Boras Ab Valve enfichable
EP0766029A2 (fr) * 1995-09-27 1997-04-02 HYDRAULIK-RING ANTRIEBS- UND STEUERUNGSTECHNIK GmbH Electrovanne et procédé de fabrication
WO2006114447A1 (fr) * 2005-04-28 2006-11-02 Bosch Rexroth Ag Soupape a cartouche electropneumatique, utilisee en particulier comme soupape pilote avec une soupape pneumatique de structure etroite pour former une unite a soupapes compacte

Also Published As

Publication number Publication date
DE112007003342A5 (de) 2009-12-31

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