WO2021121793A1 - Soupape à gaz pour alimenter une pile à combustible en hydrogène - Google Patents

Soupape à gaz pour alimenter une pile à combustible en hydrogène Download PDF

Info

Publication number
WO2021121793A1
WO2021121793A1 PCT/EP2020/081848 EP2020081848W WO2021121793A1 WO 2021121793 A1 WO2021121793 A1 WO 2021121793A1 EP 2020081848 W EP2020081848 W EP 2020081848W WO 2021121793 A1 WO2021121793 A1 WO 2021121793A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
centering element
gas valve
radially
valve housing
Prior art date
Application number
PCT/EP2020/081848
Other languages
German (de)
English (en)
Inventor
Michael Kurz
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2021121793A1 publication Critical patent/WO2021121793A1/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
    • 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
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • 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
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
    • F16F1/027—Planar, e.g. in sheet form; leaf springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • 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 a gas valve with the features of the preamble of claim 1.
  • the gas valve is intended to be used in particular to supply a fuel cell with hydrogen, so that the gas valve can in particular be a hydrogen metering valve.
  • gas valves are used, among other things, to supply fuel cells with hydrogen. In doing so, they convey 100% dry hydrogen. This represents a particular challenge for the moving parts of the gas valve, as there is no self-lubricating medium.
  • the use of a conventional lubricant is not possible, as fuel cells are highly sensitive to dirt, oils and greases.
  • the lack of lubrication can lead to increased wear in a guide area, in particular in the area of a functional cross-section serving as an armature guide. The abrasion in turn damages the fuel cell, so that in the worst case it comes to a complete malfunction.
  • Gas valves are therefore known from the prior art which use bearing bushes made of plastic or a material based on plastic as armature guides.
  • the anchor itself is made of a metallic material.
  • the wear in the area of the armature guide can thus be kept within certain limits.
  • the present invention is based on the object of providing a gas valve that has reduced abrasion or wear in the area of a functional cross-section that can be used as an armature guide. In this way, a gas valve is to be created that has a longer running time and thus also meets future requirements.
  • the proposed gas valve which can be used in particular to supply a fuel cell with hydrogen, comprises a valve housing, an armature that can be lifted relative to the valve housing, and an electromagnet for acting on the armature.
  • the armature is surrounded outside of a central armature section by at least one centering element which is essentially disk-shaped.
  • the centering element centers the armature in relation to a functional cross section, which is formed, for example, by the valve body or by a separate sleeve.
  • the centering element thus ensures a circumferentially identical radial gap between the armature and the functional cross-section. Accordingly, the centering element counteracts a one-sided reduction in the radial gap and thus a contact between the armature and the functional cross-section.
  • the centering element is preferably firmly connected to the valve housing and / or to the armature. This means that the centering element does not perform any relative movement with respect to the valve housing and / or the armature. As a result, there is no friction between the centering element and the valve housing or between the centering element and the armature. Ideally, the centering element is therefore firmly connected to both the valve housing and the armature. Furthermore, the centering element is preferably elastically deformable in the direction of movement of the armature and / or made of spring steel or a spring steel-like material.
  • the elastic deformability and / or the proposed choice of material ensures that, given a firm connection of the centering element both to the valve housing and to the armature, the armature can continue to perform a lifting movement.
  • This means that the centering element is flexible in the axial direction in order to enable the lifting movements of the armature, but has sufficient rigidity in the radial direction to center the armature.
  • the centering element preferably has a large number of cutouts. This can be, for example, large-area punchings that lead to the formation or exposure of spring arms.
  • the recesses preferably run in the shape of an arc of a circle and are arranged concentrically to one another. In this way it is achieved that the centering element is elastically deformed evenly and no transverse forces act on the armature.
  • the centering element preferably has a radially outer first ring section and a radially inner ring section, which are connected to one another via webs. While the ring sections serve to support the centering element in the axial direction, the webs form spring arms which allow elastic deformation of the centering element and thus the lifting movements of the armature.
  • the centering element can be supported radially on the outside on a shoulder of the valve housing and / or radially on the inside on a shoulder of the armature.
  • the centering element is supported in the axial direction by the at least one shoulder and is thus secured in position.
  • the shoulder of the valve housing and / or of the armature can, for example, be designed in the shape of a ring, so that the centering element is supported circumferentially.
  • the centering element be clamped radially on the outside and / or radially on the inside by means of at least one retaining ring. If only one retaining ring is provided, this can be the centering element in press in the axial direction against a shoulder, so that the centering element is prevented from lifting off the shoulder. If two retaining rings are provided, the centering element can be clamped between the two retaining rings. To secure the position of the retaining ring, it is preferably pressed into the valve housing or pressed onto the armature. In the axial direction, the retaining ring can be supported on a shoulder of the valve housing or on a shoulder of the armature.
  • the shoulder of the valve housing and / or the retaining ring preferably has or have at least one exposure to reduce the contact area with the centering element.
  • the exposure can be formed over a large area, so that the contact area is reduced to individual contact points. This has the advantage that the centering element can be deformed more easily in the direction of movement of the armature.
  • the armature has a sealing element which interacts with a sealing seat and which is placed, in particular pressed, onto an end section of the armature.
  • the centering element is clamped between the sealing element and the armature.
  • the armature preferably has a shoulder via which the centering element is supported in the axial direction.
  • the armature is acted upon by the spring force of a spring in the closing direction and that the centering element is preferably clamped between the spring and the armature.
  • the centering element can in turn be supported in the axial direction on a shoulder of the armature, while the spring force of the spring presses the centering element against the shoulder. In this case, too, there is no need for an additional retaining ring.
  • a centering element is preferably arranged in the region of an end section of the armature so that the armature is centered over its entire length.
  • the anchor is preferably designed stepped and / or composed of several anchor parts.
  • the armature preferably has a central armature section delimiting a radial gap within the functional cross-section and at least one end section with a reduced outer diameter for receiving a centering element.
  • the end section can also be stepped, so that a
  • FIG. 1 shows a schematic longitudinal section through a first metering valve according to the invention
  • FIG. 2 shows a schematic cross section through the metering valve of FIG. 1,
  • FIG. 3 shows a further schematic cross section through the metering valve of FIG. 1
  • FIG. 4 shows an enlarged section of FIG. 1
  • FIG. 5 shows a schematic longitudinal section through a second metering valve according to the invention
  • FIG. 6 shows a schematic cross section through the metering valve of FIG. 5
  • FIG. 7 shows a further schematic cross section through the metering valve of FIG. 5
  • FIG. 6 shows a schematic cross section through the metering valve of FIG. 5
  • FIG. 7 shows a further schematic cross section through the metering valve of FIG. 5
  • the gas valve 1 according to the invention shown in FIG. 1 has an essentially hollow cylinder-shaped valve housing 2 and a nozzle body 20 attached to it.
  • an armature 3 is liftably received and via a guided through the valve housing 2 formed functional cross-section 21.
  • the armature 3 has a central armature section 5 which delimits an air gap LS in the area of the functional cross-section 21.
  • the valve housing 2 is also surrounded by an annular electromagnet 4.
  • the electromagnet 4 If the electromagnet 4 is energized, a magnetic field builds up, the magnetic force of which moves the armature 3 upwards against the spring force of a spring 18. At the same time, a disk-shaped sealing element 17 pressed onto the armature 3 lifts from a sealing seat 16 which is formed by the nozzle body 20. The gas valve 1 opens. To close the gas valve 1, the energization of the electromagnet 4 is ended, so that the armature 3 and the sealing element 17 are reset by the spring force of the spring 18. The spring force of the spring 18 can be adjusted via the selected press-in depth of an adjusting disk 19 which is pressed into the valve housing 2 and on which the spring 18 is supported.
  • the armature 3 moves within the functional cross-section 21 with as little friction as possible and thus without abrasion, the armature 3 is surrounded by a disk-shaped centering element 6, 7 in the area of its two end sections. Both centering elements 6, 7 are each clamped radially inside and radially outside.
  • the lower centering element 6 is clamped radially on the inside between an annular shoulder 13 of the armature 3 and the pressed-on sealing element 17.
  • the lower centering element 6 is clamped radially on the outside between an annular shoulder 12 of the valve housing 2 and a retaining ring 14 which is pressed into the valve housing 2.
  • the upper centering element 7 is clamped radially on the inside between an annular shoulder 13 of the armature 3 and the spring 18.
  • the upper centering element 7 is clamped radially on the outside between an annular shoulder 12 of the valve housing 2 and a further retaining ring 14, which is also pressed into the valve housing 2.
  • the centering elements 6, 7 each have large-area recesses 8 which allow elastic deformation of the centering elements 6, 7 in the direction of movement of the armature 3.
  • the centering element 6 has a plurality of circular arcs Recesses 8 which are arranged concentrically to one another.
  • the centering element 7 has securely-shaped recesses 8.
  • Both centering elements 6, 7 each have a radially outer ring section 9 and a radially inner ring section 10, which are connected to one another via webs 11.
  • the webs 11 form spring arms which ensure the elastic deformability of the centering elements 6, 7 in the direction of movement of the armature 3 (see FIG. 4, where “h” denotes the stroke of the armature 3).
  • both centering elements 6, 7 can also be configured identically, in particular both according to FIG. 2 or both according to FIG. 3.
  • the centering element 6 can have the recesses 8 of FIG. 3 and the centering element 7 the recesses 8 of FIG. 2.
  • the shape of the recesses 8 can vary as long as they ensure the required elastic deformability of the centering elements 6, 7.
  • FIGS. 1 Another preferred embodiment of a gas valve 1 according to the invention can be seen in FIGS.
  • the centering elements 6, 7 are not supported radially on the outside over their entire circumference, but only at points.
  • the retaining rings 14 each have exposed areas 15 which lead to a reduced contact surface 22 (see FIG. 6).
  • the contact surfaces 22 only make selective contact with the centering elements 6, 7, specifically in the area of the contact surfaces 22 '(see FIG. 7).
  • FIG. 1 Another preferred embodiment is shown in FIG. Here the centering element 6 (or 7) is clamped between two retaining rings 14 both radially on the outside and radially on the inside.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne une soupape à gaz (1) pour alimenter une pile à combustible en hydrogène, comprenant un boîtier de soupape (2), un induit (3) qui peut être déplacé avec un mouvement de va-et-vient par rapport au boîtier de soupape (2), et un électro-aimant (4) pour agir sur l'induit (3). Selon l'invention, l'induit (3) est entouré à l'extérieur d'une section d'induit centrale (5) par au moins un élément de centrage (6, 7) de configuration sensiblement en forme de disque.
PCT/EP2020/081848 2019-12-18 2020-11-12 Soupape à gaz pour alimenter une pile à combustible en hydrogène WO2021121793A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019219988.7A DE102019219988A1 (de) 2019-12-18 2019-12-18 Gasventil zur Versorgung einer Brennstoffzelle mit Wasserstoff
DE102019219988.7 2019-12-18

Publications (1)

Publication Number Publication Date
WO2021121793A1 true WO2021121793A1 (fr) 2021-06-24

Family

ID=73452172

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/081848 WO2021121793A1 (fr) 2019-12-18 2020-11-12 Soupape à gaz pour alimenter une pile à combustible en hydrogène

Country Status (2)

Country Link
DE (1) DE102019219988A1 (fr)
WO (1) WO2021121793A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936425A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftsoffeinspritzventil
EP1363055A2 (fr) * 2002-05-16 2003-11-19 Carl Freudenberg KG Soupape électromagnétique
DE10261610A1 (de) * 2002-12-27 2004-07-08 Robert Bosch Gmbh Ventil zum Steuern eines Fluids
DE202010010279U1 (de) * 2010-07-15 2010-11-18 Bürkert Werke GmbH Magnetventil
CN102116389A (zh) * 2009-12-30 2011-07-06 北京控制工程研究所 一种单组元推力器电磁阀
EP2400193A1 (fr) * 2010-06-23 2011-12-28 Asco Numatics GmbH Dispositif destiné à la régulation du débit d'un milieu liquide ou gazeux
US20150233487A1 (en) * 2014-02-19 2015-08-20 Tgk Co., Ltd. Electromagnetic valve
CN106641391B (zh) * 2016-12-05 2019-03-26 北京控制工程研究所 一种快速响应螺线管电磁阀

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3725590A1 (de) * 1987-08-01 1989-02-09 Staiger Steuerungstech Membranventil
DE4419446C2 (de) * 1994-06-03 1998-11-05 Staiger Steuerungstech Ventil
DE102010040628A1 (de) * 2010-09-13 2012-03-15 Robert Bosch Gmbh Stromlos geschlossenes Magnetventil

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936425A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftsoffeinspritzventil
EP1363055A2 (fr) * 2002-05-16 2003-11-19 Carl Freudenberg KG Soupape électromagnétique
DE10261610A1 (de) * 2002-12-27 2004-07-08 Robert Bosch Gmbh Ventil zum Steuern eines Fluids
CN102116389A (zh) * 2009-12-30 2011-07-06 北京控制工程研究所 一种单组元推力器电磁阀
EP2400193A1 (fr) * 2010-06-23 2011-12-28 Asco Numatics GmbH Dispositif destiné à la régulation du débit d'un milieu liquide ou gazeux
DE202010010279U1 (de) * 2010-07-15 2010-11-18 Bürkert Werke GmbH Magnetventil
US20150233487A1 (en) * 2014-02-19 2015-08-20 Tgk Co., Ltd. Electromagnetic valve
CN106641391B (zh) * 2016-12-05 2019-03-26 北京控制工程研究所 一种快速响应螺线管电磁阀

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