EP2126425A1 - Dispositif de fermeture pour récipient sous pression de générateur de gaz basse température, pouvant être rempli de gaz sous pression - Google Patents

Dispositif de fermeture pour récipient sous pression de générateur de gaz basse température, pouvant être rempli de gaz sous pression

Info

Publication number
EP2126425A1
EP2126425A1 EP08701032A EP08701032A EP2126425A1 EP 2126425 A1 EP2126425 A1 EP 2126425A1 EP 08701032 A EP08701032 A EP 08701032A EP 08701032 A EP08701032 A EP 08701032A EP 2126425 A1 EP2126425 A1 EP 2126425A1
Authority
EP
European Patent Office
Prior art keywords
valve body
closure device
pressure
opening
valve
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.)
Withdrawn
Application number
EP08701032A
Other languages
German (de)
English (en)
Inventor
Martin Häge
Helmut Grantz
Gunnar Helms
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.)
Mbb International Group AG
Original Assignee
Mbb International Group 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 Mbb International Group AG filed Critical Mbb International Group AG
Publication of EP2126425A1 publication Critical patent/EP2126425A1/fr
Withdrawn legal-status Critical Current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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/022—Devices for relieving the pressure on the sealing faces for lift valves using balancing surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
    • F16K1/301—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means
    • F16K1/302—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means with valve member and actuator on the same side of the seat
    • 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
    • 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
    • F16K31/0693—Pressure equilibration of the armature
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26094—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow characterised by fluid flow controlling valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • B60R2021/2633—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output with a plurality of inflation levels
    • B60R2021/2636—The volume of gas being continuously adjustable

Definitions

  • the invention relates to a closure device for a pressurized gas-filled pressure vessel of a cold gas generator according to the preamble of claim 1.
  • US Pat. No. 6,068,288 discloses a closure device for a pressurized gas-filled pressure vessel of a cold gas generator. Such cold gas generators are used in particular for vehicle airbag systems.
  • the closure device comprises a valve body which closes a container opening communicating with the environment in a rest position.
  • an electromagnetic drive device is provided, through which the valve body can be transferred to a drive position.
  • the valve body is designed as a slide. By a displacement movement different flow paths are released to allow outflow of the compressed gas.
  • This device has the disadvantage that high forces for controlling the slide are required. In addition, these increased forces make it difficult to control such. By such a closure device, the required short opening times can not be realized.
  • the invention is therefore an object of the invention to provide a closure device for a filled with compressed gas pressure vessel of a cold gas generator, which allows a precisely controllable and fast opening movement of a cold gas generator, so that a fast and metered delivery of high-pressure gas under pressure and a safe closing is made possible after the delivery of the compressed gas.
  • the closure device has a valve body which is displaceably arranged in a valve housing and which is movable within an antechamber of the valve housing, the valve body having an effective pressure surface facing the main chamber and an effective pressure surface facing the prechamber, which are the same size or approximately the same size and an outer effective pressure surface on which acts an atmospheric pressure in the opening direction, and has a further outer effective pressure surface acts on the atmospheric pressure in the closing direction, wherein additionally acts on a force storage element on the valve body, which acts in the closing direction.
  • this arrangement has the advantage that a floating bearing of the valve body is provided in the valve housing, in which a pointing to the main chamber effective pressure surface and an antechamber facing effective pressure surface are equal or approximately equal in size, so that a balance of power or almost an equilibrium of forces is given and the high internal pressure of the container with respect to the forces acting on the valve body in the antechamber forces quasi quits. It is thereby achieved that the resulting closing force of the valve body is reduced to the pressure force which results from the atmospheric pressure on the pressure surfaces acting in the opening and closing direction and the closing force of the force storage element.
  • to control an opening movement significantly reduced forces compared to the actual container internal pressure suffice to control the valve body. This results in a fast and accurate control both in the opening and in the closing direction.
  • This embodiment according to the invention also has the advantage that pressure tolerances due to changing operating temperatures have no influence on the control and reaction times of the closure device. This is due to the fact that the filling pressure of the pressure vessel also rests in the antechamber of the valve housing and the respective effective pressure surfaces are equal or approximately equal, so that a pressure equalization occurs, regardless of the absolute pressure prevailing in the pressure vessel.
  • the first effective pressure surface on the valve body to the main. chamber has, by a seal, in particular seat seal, and the second effective pressure surface on the valve body, which faces the prechamber, by a seal, in particular seat seal, limited, wherein a diameter of an inner circumference of the seal at the first effective, facing the main chamber Pressure area equal to a diameter of an outer circumference of the seal at the Ren effective effective for Vorhunt facing pressure surface of the valve body is provided.
  • the first and second effective pressure surface on the valve body an at least two-part valve body is formed.
  • a seal is provided, which is designed as a permanent seal. This makes it possible that one or more interfaces of the two- or multi-part valve body are sealed against the environment, so that a filling pressure can not escape.
  • the valve housing is preferably also formed in two parts. Thereby, a simple assembly can be made possible together with the valve body.
  • the interface of the two-part valve housing is sealed by a permanent seal.
  • a secure seal to the antechamber of the valve housing can be ensured.
  • the valve body has one or more through holes extending in the displacement direction, which connect the main chamber and pre-chamber, wherein preferably a large central through-hole is provided.
  • a large central through bore is a simple structural design to form a two-piece valve body and to allow faster compensation of the pressures between the main and prechambers.
  • the input and / or output of the central through-hole in the valve body have a rounded or trumpet-shaped profile.
  • the valve body has a diameter-reduced region in which a radially inwardly directed annular collar of the valve housing engages. It can thereby be achieved that the effective pressure surface facing the prechamber can be made relatively large on the valve body and adapted to the effective pressure surface facing the main chamber, so that a large container opening of the pressure container is made possible. Furthermore, this makes it possible that a force storage element is received in this undercut, which is supported on the one hand on the radially inwardly directed annular collar of the valve housing and opposite to a radially outwardly extending annular collar of the valve body and acts in the closing direction.
  • the drive device is provided adjacent to the pre-chamber and for an armature to be actuated by an actuator.
  • a seal is provided between the housing of the drive device and the valve housing for producing a permanently sealed closure between the prechamber and the surroundings.
  • the valve body is preferably provided that the armature is designed as an annular disc and in particular is permanently attached to the valve body. This can be done for example by a positive and / or positive connection. Furthermore, cohesive connections, such as adhesive bonds, welding bonds or the like may be provided. Furthermore, a Ve ⁇ til analysesabites may be integrally formed with the armature.
  • the drive device preferably has a housing with a receiving space into which the actuator can be inserted, wherein a sealing plate is provided, which seals the receiving space of the actuator to the prechamber. This makes it possible that the actuator is not located in the high pressure area, but is arranged separately from the prechamber.
  • this sealing plate is designed as a stop for the damped opening movement of the valve body. Thereby, the vibration generation during the opening and closing movement of the valve body can be reduced.
  • a container opening closing, radially outwardly facing annular collar of the valve body on a radial outer circumferential surface has a non-sealing damping ring which engages the valve housing. This damping ring allows for improved guidance and damping of the vibration system.
  • the compressed gas is preferably provided that in the container opening of the pressure vessel, a rotationally symmetrical guide surface is arranged, which has a directed into the container interior pipe section which widens in the flow direction at the opposite end. This makes it possible that a deflection of the outflowing compressed gas is favored in the radially arranged outlet openings and the flow field is already homogenized early. As a result, defined flow conditions can be achieved.
  • a rotationally symmetrical guide surface is provided on a region of the valve body facing the main chamber, which is aligned for the deflection of the outflowing compressed gas.
  • the rotationally symmetric guide surface preferably has an analogous course to the rotationally symmetric guide surface arranged in the container opening of the pressure vessel in order to calm the flow field and to achieve a favored outflow.
  • This rotationally symmetrical guide surface on the valve body also has the advantage that when there is a flow around this guide surface, a buoyancy force for the valve body is formed, which counteracts a possible closing force due to dynamic pressure changes. This can be used to support fast opening.
  • This rotationally symmetrical guide surface is preferably trumpet-shaped.
  • a pressure-compensating supportive element is provided, which extends at least in a closed position of the valve body in a pressure and / or flow-calmed region of the pressure vessel.
  • the pressure compensation element extending into the interior of the pressure vessel has a preferably cylindrical pipe section which is preferably smaller in diameter than the fastening section which can be inserted into the diameters of the central throughbore.
  • this embodiment has the advantage that the pipe section in a transition region to the valve body has a widening portion, which allows a flow-favored deflection. As a result, a rotationally symmetrical guide surface for homogenizing the flow field is again achieved by the outer surface of the element.
  • the pipe section has an intermediate portion adjacent to the widened region, which is inserted into the central through-bore of the valve body.
  • a press-fitting or a cohesive connection for the secure arrangement and receiving the pressure compensation element supporting the valve body.
  • the guide surfaces provided in the pressure vessel which determine the flow field of the outflowing compressed gas, have a rough surface. This makes it possible to provide a stall directly on the sliding surfaces and thus a flow profile with a high mass flow rate is possible.
  • a drive device to be provided in a region of the valve body facing the container opening of the pressure vessel, which can be actuated to actuate a closing movement of the valve body. This allows a separate and adapted control of the valve body for an opening and closing movement.
  • this drive device has a control chamber in which a closing body or a control element, in particular a sleeve, is inserted.
  • This additional control element can accelerate the closing movement of the valve body in that the control essentially closes the outflow cross section and the pressure forces acting in the opening direction are considerably reduced by the outflowing compressed gas.
  • the control element is actuated by the drive device in order to reduce the acting pressure force. Subsequently, a rapid subsequent closing of the valve body is achieved.
  • this control element is designed as a sleeve, which is provided in a control chamber of the valve body, which adjoins a container opening of the pressure vessel and long of the longitudinal axis of the valve body is movable.
  • the opening cross section of the outlet opening can be reduced and thus a pressure reduction can be achieved. Due to this changed pressure situation results in an immediate closing movement of the valve body.
  • control is arranged with radial play in the control chamber of the valve body. This allows a simple and fast control possible.
  • Figure 1 is a schematic sectional view of a
  • FIG. 2 shows a schematic sectional illustration of the embodiment according to FIG. 1 in a working position
  • Figure 3 is a schematic sectional view of a
  • FIG. 4 shows a schematic sectional representation of the embodiment according to FIG. 3 in a working position
  • FIG. 5 shows a schematic sectional illustration of an alternative embodiment according to FIG. 3 in a closed position
  • FIG. 6 shows a schematic sectional view of the embodiment according to FIG. 5 in a working position
  • FIGS. 7a to e show schematic sectional views of a further alternative embodiment of a closure device according to FIG. 1.
  • FIG. 1 shows a schematic sectional view of a cold gas generator 11 with a first embodiment of a closure device 12, which is provided on a pressure vessel 14.
  • the pressure vessel 14 has a container opening 16 at the upper end.
  • a valve housing 18 is inserted, which is formed in two parts according to the embodiment.
  • the valve housing 18 may also be multi-part.
  • a lower portion 19 of the valve housing 18 engages the container opening 16 and protrudes into an interior of the pressure vessel 14, which forms a main chamber 15, and extends in an opposite direction outside of the pressure vessel 14.
  • the valve housing 18 receives a valve body 21 and a Antriebsvorrich- 22 on which form the closing device 12 together with the valve housing.
  • a pressure bag 24 is attached, which is only partially shown in FIG, but is provided in all pressure vessels 14.
  • the valve body 21 is transferred from a closed position shown in Figure 1 by the drive device 22 in a working position of the open position shown in Figure 2, so that in the pressure vessel 14 located pressure gas can flow through the radially aligned outlet openings 26 in the valve housing 18 in the pressure bag 24.
  • a valve seat 28 is provided, on which a valve seat surface 29 of the valve body 21 rests in a closed position.
  • a seal 31 is provided, which rests on the valve seat 28 and an outlet region 32 between the container opening 16 and the outlet openings 26 closes.
  • the valve body 21 is preferably formed in two parts and has a first valve body portion 34 and a second valve body portion 35 which are fastened to each other.
  • a screw connection is provided for easy installation.
  • Further alternative embodiments for the permanent and fixed connection of the two valve body sections 34, 35 are also possible.
  • a seal 36 is preferably provided, which ensures a permanent tightness of the separation point.
  • the first valve body portion 34 is formed sleeve-shaped with a radially outwardly directed Rbngbund 38, at its pointing to the container opening 16 axial end face, the valve seat surface 29 is formed. Through the sleeve-shaped configuration of the first valve body portion 34, a central through-hole 39 is provided, which also extends along the second valve body portion 35.
  • the second valve body portion 35 is also formed sleeve-shaped and has a container opening 16 directed to the second valve seat surface 41, which bears against a valve seat 42 of an upper portion 20 of the valve housing 18.
  • a seal 43 is provided, which is preferably the same as the seal 31 is formed.
  • a seat seal can be provided for this purpose.
  • a Kraft Albanyeleme ⁇ t 47 is arranged between the lower and upper portions 19, 20 of the valve housing 18, an undercut region or a taper 46 is formed, in which a Kraft Albanyeleme ⁇ t 47 is arranged.
  • a force storage element 47 may be a coil spring, plate spring or the like. Likewise, other types of energy storage elements be used.
  • the force storage element 47 engages on one side on an outer pressure surface 48, which is the valve seat surface 29 opposite to the Ri ⁇ gbund 38 of the valve body 21 is provided. Opposite the force storage element 47 engages a R vomg Structure 51 of a radially inwardly facing annular collar 50, which is formed at the upper portion 20 of the valve housing 18.
  • the valve body 21 is slidably guided in a pre-chamber 52 in the valve housing 18, in particular in the upper portion 20 of the valve housing 18.
  • guide surfaces between an outer periphery 53 of the valve body portion 35 and an inner periphery 54 of the upper portion 20 are provided.
  • the lifting movement of the valve body 21 is limited by the drive device 22, which acts on the upper portion 20 of the valve housing 18.
  • the drive device 22 comprises a ferrite core 57 inserted in a housing 56 and an actuator 59 arranged in a receiving space 58.
  • the receiving space 58 is closed by a sealing plate 61. This sealing plate 61 preferably extends completely over the receiving space 58, so that in the receiving space 58 no internal container pressure acts on the actuator 59.
  • the lifting movement of the valve body 21 can be limited by the core 57 or in particular by the sealing plate 61.
  • the sealing plate 61 preferably also has damping properties.
  • the drive device 22 further comprises an annular armature 60 which is fixedly connected to the valve body 21. This armature 60 can additionally be guided by an inner guide section on the core 57 and / or housing 56.
  • the pre-chamber 52 is permanently sealed in the transition region from the housing 56 of the drive device 22 to the upper portion 20 of the valve housing 18 by a seal 63. This seal 63 may also be provided at the upper end of the upper portion 20 of the valve housing 18 to the housing 56 of the drive device 22.
  • a closure device 12 is achieved with a floating valve body 21, wherein the pressure in the main chamber 15, ie in the pressure vessel 14, is equal to that in the pre-chamber 52. Due to the large central Gangsbohrung 39, such pressure equalization is achieved quickly and can be maintained.
  • the force acting on the valve body 21 closing force is independent or almost independent of the container internal pressure due to the pressure equalization and the design of the effective pressure surfaces 37, 44.
  • the first effective pressure surface 37 which acts on the valve seat surface 29 of the valve body 21 through the inner diameter of the seal 31 is determined.
  • the second effective pressure surface 44 which faces the pre-chamber 52, is determined by an outer diameter of the seal 43.
  • the inner diameter of the seal 31 corresponds to the outer diameter of the seal 43 or substantially this, so that a pressure equalization is possible.
  • the closing force is determined by the atmospheric pressure acting from the outside and the force of the force storage element 47. Via the outlet openings 26, the atmospheric pressure acts on the outer pressure surface 48 in the closing direction, in which the force storage element 47 also acts.
  • the resulting compressive force is determined by the size of the outer pressure surface 48 and the force of the force storage element 47.
  • This closing force counteracts an opening force by an outer pressure surface 64 which is formed outside of the seal 31 on the annular collar 38. For a closing force to prevail, it is thus necessary that the pressure force of the force storage element 47 and the pressure force resulting from the outer pressure surface 48 is greater than the pressure acting in the opposite direction, which results from the outer pressure surface 64 on the annular collar 38.
  • the electromagnetic drive device 22 For driving the valve body 21, the electromagnetic drive device 22 is energized, whereby a lifting movement of the valve body 21 is achieved and a detachment of the valve seat surface 29 of the valve body 21 is given by the valve seat 28 on the valve housing 18. As a result, the compressed gas can flow out through the outlet openings 26 into the pressure bag 24. During the outflow of the compressed gas, a pressure equalization between the pre-chamber 52 and the main chamber 15 or the interior of the pressure vessel 14 takes place at the same time, so that the floating bearing and the on the valve body 21 acting balance of forces due to the through hole 39 can be maintained. To close the valve body 21, the drive device 22 is stopped, so that the closing force generated by the force storage element 47 and outer pressure surfaces 48 transferred the valve body 21 in a closed position shown in FIG.
  • a damping ring 68 may preferably be provided on a radial peripheral surface 67 of the annular collar 38. Such a damping ring 68 can also contribute to the damping of the vibration system. This damping ring 68 has no sealing effect.
  • the present embodiment thus has the advantage that the valve body 21 is directly controllable, whereby short reaction times are achieved and the controllability is improved.
  • this arrangement has the advantage due to the large flow cross-sections, that nitrogen can be used as compressed gas, whereby lower requirements for the design of the tightness of the system is given as in helium.
  • This closure device 12 is formed as a self-contained unit and can be attached to the respective pressure vessel 14, wherein the lower portion 20 of the valve housing 18 is modified for fixing to the container opening 16. Furthermore, such a closure device 12 is temperature and pressure tolerant.
  • FIG. 3 shows an alternative embodiment of a closure device 12 to FIG. 1 in a closed position.
  • FIG. 4 shows alternative embodiments according to FIG. 3 in a working position.
  • FIGS. 1 and 2 reference is made to FIGS. 1 and 2 with regard to the correspondence of the features.
  • FIGS. 3 and 4 differs from the embodiment in FIG. 1 in that a rotationally symmetrical guide surface 72 is provided in the container opening 18, which tube section 73 protrudes into the interior of the container and a tube section 73 in the container interior. direction pointing pipe section 74 which expands.
  • a rotationally symmetrical guide surface 72 is provided in the container opening 18, which tube section 73 protrudes into the interior of the container and a tube section 73 in the container interior. direction pointing pipe section 74 which expands.
  • this preferably funnel-shaped or in particular trumpet-shaped guide surface which is held by webs 76 to the lower section 20 of the valve housing 18, the flow field is homogenized early in the event of outflow of the compressed gas and the outflow velocity is increased.
  • a further rotationally symmetrical guide surface 77 is provided on an underside of the valve body, which is likewise held by webs 76 to the underside of the valve body 21.
  • This rotationally symmetrical guide surface 77 engages in the closed position of the valve body 21 in the rotationally symmetrical guide surface 72 partially.
  • the open state of the closure device 12 is achieved in that the outflowing through the tubular portion 73 of the rotationally symmetric guide surface 72 volume flow is deflected via the guide surface 77 also in the direction of the outlet opening 26.
  • the opening speed of the valve body 21 is thereby increased due to the applied compressive force.
  • the expanded pipe section 74 of the rotationally symmetrical guide surface 72 and the rotationally symmetrical guide surface 77 form a fan-shaped arrangement for flow deflection.
  • Such rotationally symmetrical guide surfaces 72, 77 can be used or attached individually or jointly as well as subsequently in a container opening 16 or on an underside of the valve body 21.
  • FIG. 5 shows an alternative embodiment of the closure device 12 according to FIG. 1 in a closed position.
  • FIG. 6 shows the embodiment according to FIG. 5 in a working position.
  • the valve body 21 receives on its underside or to the pressure vessel 14 facing a pressure equalization-supporting element 81.
  • This pressure compensation supporting element 81 is tubular and has, for example, a first cylindrical pipe section 83 which extends through the container opening 16 extends through into a pressure and / or flow-calm region of the pressure vessel 14.
  • An extension section 84 which merges into a fastening section 86, adjoins this cylindrical tube section 83 in the outflow direction of the compressed gas.
  • This attachment portion 84 is preferably cylindrical and provided for insertion into the through hole 39 of the valve body 21. Alternatively, other non-positive, positive or cohesive connections for attachment of the pressure compensation element 81 to the valve body 21 may be provided.
  • the expansion section 84 preferably has an outer surface 87, which approximates or corresponds to a widened pipe section 74 of the rotationally symmetrical guide surface 72 or the rotationally symmetrical guide surface 77 in the geometry in order to achieve a flow deflection.
  • this pressure compensation element 81 which can also be called a proboscis, a quick pressure equalization in the prechamber 52 to the main chamber 15 is enabled as soon as compressed gas flows out of the pressure vessel 14 and the pressure conditions due to an opening or closing movement of the valve body 21 in the prechamber 52 change. This has the particular advantage that a closing force acting on the valve closing body 21 can be counteracted, since a negative pressure in the outflow region 32 is generated during the outflow of the compressed gas.
  • the flow-bearing surfaces it is fundamentally advantageous for the flow-bearing surfaces to have a rough surface, so that a boundary layer thickness of an airfoil becomes smaller, since this is easier to control in the case of turbulent flows than in the case of laminar flows.
  • FIGS. 7 a to e show a further alternative embodiment of a closure device 12 according to FIG. 1, wherein only that part of the part of the valve body 21 facing the container opening 16 is shown enlarged, which deviates from FIG. Incidentally, reference is made to the description of the embodiment according to FIG.
  • a drive device 91 is provided in a lower portion of the valve body 21, a drive device 91 is provided.
  • This drive device 91 comprises a control element, in particular a sleeve 92, in a control chamber 93, which forms part of the through-bore 39.
  • the control chamber 93 and the sleeve 92 are preferably formed in size such that the cross section of the through hole 39 extends completely over the length of the valve body 21.
  • a non-illustrated actuator is provided outside the control chamber 93 which causes an actuating movement of the sleeve 92.
  • the sleeve 92 is movably mounted in the control chamber 93 with sufficient radial clearance.
  • the function and effect of the drive device 91 will be described below with reference to FIGS. 7a to e.
  • FIG. 7 a shows the closed position of the valve body 21 relative to the container opening 16.
  • the valve seat surface 29 abuts against the valve seat 28.
  • valve body 21 By controlling the drive device 22, the valve body 21 is transferred to a working position. In this working stroke, the sleeve 92 remains in the control chamber 93. The outlet region 32 for the outflow of compressed gas is released.
  • the drive device 91 For quick transfer of the valve body 21 in a closed position, the drive device 91 is actuated. By driving the sleeve 92, this is led out of the control chamber 93 by a lifting movement, so that it is guided into the outlet region 32 and allows a primary blocking of the radial outlet openings 26, as shown in Figure 7c. Due to the changed pressure situation occurs a sudden transfer of the valve body 21 in a Sch saupositio ⁇ , as shown in Figure 7d. Subsequently, the sleeve 92 is completely retracted into the control chamber 93, as shown in Figure 7e, so that a reopening movement of the valve body 21 is not hindered. The retraction of the sleeve 92 in the control chamber 93 can be achieved for example by a spring force. Such an alternative embodiment can also be superimposed on the embodiments according to FIGS. 3 to 6.

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

Abstract

La présente invention concerne un dispositif de fermeture destiné à un récipient sous pression (14) d'un générateur de gaz basse température (11), pouvant être rempli de gaz sous pression, le corps de soupape (21) étant disposé mobile dans un boîtier de soupape (18) et présentant une surface de compression active orientée vers la chambre principale (15) et une surface de compression active orientée vers la préchambre (15) qui sont identiques et peuvent subir l'action de la pression de remplissage de la chambre principale (15), et le corps de soupape (21) étant maintenu en position de fermeture par une surface de compression (64) active extérieure sur laquelle une pression atmosphérique agit en direction de fermeture, et par un élément d'accumulation de force (47).
EP08701032A 2007-01-17 2008-01-09 Dispositif de fermeture pour récipient sous pression de générateur de gaz basse température, pouvant être rempli de gaz sous pression Withdrawn EP2126425A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007003321A DE102007003321A1 (de) 2007-01-17 2007-01-17 Verschlusseinrichtung für einen mit Druckgas befüllbaren Druckbehälter eines Kaltgasgenerators
PCT/EP2008/000096 WO2008086963A1 (fr) 2007-01-17 2008-01-09 Dispositif de fermeture pour récipient sous pression de générateur de gaz basse température, pouvant être rempli de gaz sous pression

Publications (1)

Publication Number Publication Date
EP2126425A1 true EP2126425A1 (fr) 2009-12-02

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EP08701032A Withdrawn EP2126425A1 (fr) 2007-01-17 2008-01-09 Dispositif de fermeture pour récipient sous pression de générateur de gaz basse température, pouvant être rempli de gaz sous pression

Country Status (9)

Country Link
US (1) US20100012877A1 (fr)
EP (1) EP2126425A1 (fr)
JP (1) JP2010516954A (fr)
KR (1) KR20090111330A (fr)
CN (1) CN101583815A (fr)
CA (1) CA2673338A1 (fr)
DE (1) DE102007003321A1 (fr)
EA (1) EA015162B1 (fr)
WO (1) WO2008086963A1 (fr)

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DE102013207594A1 (de) 2013-04-25 2014-10-30 Robert Bosch Gmbh Ventil für einen Kaltgasgenerator und Luftsacksystem
DE102013208693A1 (de) 2013-05-13 2014-11-13 Robert Bosch Gmbh Verschlussvorrichtung für einen Kaltgasgenerator, Verfahren zum Betreiben einer Verschlussvorrichtung für einen Kaltgasgenerator und Verfahren zum Herstellen einer Verschlussvorrichtung für einen Kaltgasgenerator
DE102013216588A1 (de) 2013-08-21 2015-02-26 Robert Bosch Gmbh Vorrichtung und Verfahren zum Aktivieren eines Airbags für ein Fahrzeug sowie Airbagsystem für ein Fahrzeug
DE102015200900A1 (de) 2014-01-28 2015-07-30 Robert Bosch Gmbh Vorrichtung und Verfahren zum Steuern eines Volumenstroms eines unter Druck gespeichertenMediums zum Aktivieren einer Aufprallschutzeinrichtung sowie Vorrichtung zum Aktivieren einer Aufprallschutzeinrichtung
DE102014210156A1 (de) 2014-05-28 2015-12-03 Robert Bosch Gmbh Verschlussvorrichtung für einen Gasgenerator, Gasgenerator, Verfahren zum Betreiben einer solchen Verschlussvorrichtung und Verfahren zum Herstellen einer solchen Verschlussvorrichtung
CA2963840A1 (fr) * 2014-10-09 2016-04-14 Seattle Children's Hospital (dba Seattle Children's Research Institute) Longs plasmides poly (a) et methodes d'introduction de longues sequences poly(a) dans le plasmide
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Also Published As

Publication number Publication date
DE102007003321A1 (de) 2008-08-21
KR20090111330A (ko) 2009-10-26
JP2010516954A (ja) 2010-05-20
WO2008086963A1 (fr) 2008-07-24
EA200900990A1 (ru) 2009-12-30
CN101583815A (zh) 2009-11-18
EA015162B1 (ru) 2011-06-30
CA2673338A1 (fr) 2008-07-24
US20100012877A1 (en) 2010-01-21

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