EP3601870A1 - Pressurised container and method for producing an outer casing for a pressurised container - Google Patents

Pressurised container and method for producing an outer casing for a pressurised container

Info

Publication number
EP3601870A1
EP3601870A1 EP19711890.4A EP19711890A EP3601870A1 EP 3601870 A1 EP3601870 A1 EP 3601870A1 EP 19711890 A EP19711890 A EP 19711890A EP 3601870 A1 EP3601870 A1 EP 3601870A1
Authority
EP
European Patent Office
Prior art keywords
pressure vessel
outer shell
fiber
fastening elements
region
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.)
Granted
Application number
EP19711890.4A
Other languages
German (de)
French (fr)
Other versions
EP3601870B1 (en
Inventor
Sascha Machalett
Florian Eidmann
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP3601870A1 publication Critical patent/EP3601870A1/en
Application granted granted Critical
Publication of EP3601870B1 publication Critical patent/EP3601870B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0123—Shape cylindrical with variable thickness or diameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0604—Liners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0617—Single wall with one layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0621—Single wall with three layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0658—Synthetics
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/0126—One vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0188—Hanging up devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0308—Protective caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2109—Moulding
    • F17C2209/2127—Moulding by blowing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2109—Moulding
    • F17C2209/2145—Moulding by rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2154—Winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/219—Working processes for non metal materials, e.g. extruding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/234—Manufacturing of particular parts or at special locations of closing end pieces, e.g. caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/234—Manufacturing of particular parts or at special locations of closing end pieces, e.g. caps
    • F17C2209/236—Apparatus therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0178—Cars

Definitions

  • the invention relates to a pressure vessel according to the preamble of patent claim 1. Furthermore, the invention relates to a method for producing an outer shell for such a pressure vessel.
  • Pressure vessels and corresponding methods for producing an outer shell for such a pressure vessel are known in numerous variations. In general, such pressure vessels can be filled, for example, with gases or pressure-liquefied gases and therefore store a considerable amount of energy.
  • a so-called type 4 high-pressure container for compressed natural gas can be installed in a rear-side loading space and / or below ground in the area of a center tunnel of the vehicle body of a vehicle which is operated with natural gas.
  • a frequently used method for fastening pressure vessels in the vehicle or under the vehicle uses tank straps, which allow a tolerance compensation when filling the container, but do not offer a structural influence of the container stiffness on the body of the vehicle.
  • a deflection of the pressure tank is ensured in plastic deformation of the body, for example in a side crash, which is to ensure protection against damage to the pressure tank.
  • the transmission of the crash energy takes place solely by the components or load paths of the body.
  • a generic pressure vessel preferably has a cylindrical construction, in which a cylindrical pressure vessel jacket is closed on both sides by bulged, outwardly curved bottoms.
  • the pressure vessel wall can be constructed, for example, in three layers and comprise an inner layer, a middle layer of a fiber composite plastic and an outer layer of a further fiber composite plastic.
  • the inner layer is a plastic liner made by blow molding or rotary / sintering process or thermoforming process.
  • the plastic liner reinforcing middle layer is preferably wound in a wet winding process as a fiber winding on the plastic liner.
  • the fiber winding consists of, for example, carbon, aramid, glass and / or boron fibers embedded in a matrix of thermosets or thermoplasts.
  • the fibers are applied to the plastic liner in different fiber orientations.
  • the preferably impact-absorbing outer layer may likewise be a fiber winding which is wound onto the middle layer in a wet winding process.
  • the outer winding thus formed consists, for example, of carbon and / or glass fibers embedded in a matrix.
  • the finished high pressure container has, for example, on a stirnsei term container bottom on an outwardly projecting neck piece, in which a valve is integrated. Otherwise, the high-pressure vessel is usually completely smooth on the outside. In its installed position, the high-pressure container is positionally secured in position by means of tension bands, which surround the smooth surface Zylin derwand the high-pressure vessel.
  • a pressure vessel for a motor vehicle with a fastening device is known.
  • the fastening device is designed to connect the pressure vessel with a body of the motor vehicle.
  • the fastening device comprises at least two connecting pins and at least two bearings.
  • a connecting pin is connected to a bearing in a connection point.
  • the connecting pins and / or the bearings are each connected to the pressure vessel in a pressure tank connection area and extend from the outer surface away from the pressure vessel.
  • the pressure tank connection areas each have an extension.
  • the connecting pin and the bearing are formed and arranged in the connection point at least in regions such that the extension E is guided kinematically by a movement of the bearing and / or the connecting pin with only one translational degree of freedom.
  • a process for producing a pressurizable container which has a made of a fiber-plastic composite, cylindrical central part, at the ends of each of which a bottom part of a fiber-reinforced plastic composite material is made to close the container.
  • the middle part of the container is arranged on a winding mandrel of a wound body as a prefabricated middle part or produced by winding up a roving.
  • An inner surface of the bottom part is defined by the winding mandrel of the winding body and an end of the central part adjacent to the bottom part, and an outer surface of the bottom part is defined by a plurality of shaping parts.
  • the bottom part of the container is produced by winding a preferably unidirectional roving into a winding space defined by the winding mandrel and the shaping parts up to the end of the middle part, the shaping parts starting successively from a winding axis of the winding body be arranged on the outside of the winding axis when a part winding space formed between the winding mandrel and the respective previously arranged shaping part is filled.
  • the object of the present invention is to provide a pressure vessel and a method for producing an outer shell for such a pressure vessel, which can be integrated into the body structure in a simple manner as a stiffening element.
  • a hollow cylindrical extension is formed at both axial ends of a cylinder-like central region of an outer shell, which over the projects beyond the respective end region and merges at its open end into a plurality of fastening elements which each have a plane connection surface arranged radially on the outside.
  • the method for producing an outer shell for such a pressure vessel comprises the steps of: wrapping an inner container and / or a respective winding mandrel adjoining axially thereto with a continuous fiber material, so that at both axial ends of the cylinder-like middle region of the outer shell hollow cylindrical extension is formed, which projects beyond the respective end region. Curing of the outer shell and mechanical processing of the respective extension take place in such a way that the fastening elements with the respective planar connection surfaces are formed therefrom.
  • the wound continuous fiber material can be provided with a matrix material before curing.
  • the continuous fibers may already be preimpregnated with the matrix system.
  • the fastening elements can be designed as tabs.
  • the tabs may each have an opening through which a screw can be guided in order to screw the pressure vessel to the body structure.
  • the fastening elements can be introduced into the hollow cylindrical extension by a first machining operation, in particular by milling or cutting.
  • the planar connection surfaces can then be introduced into the fastening elements by a second machining operation, in particular by milling.
  • at least the hollow cylindrical extension of the outer shell may have a round outer contour and a polygonal inner contour with flat inner surfaces and / or round inner surfaces.
  • the planar connection surfaces can be formed in the region of the pla nen inner surfaces. As a result, any number of connection surfaces in different angular positions can be realized.
  • the connection areas can thus be freely positioned within the axis of rotation and designed independently of the vehicle.
  • the outer shell can be made of a fiber-reinforced, preferably a continuous fiber reinforced plastic.
  • the outer shell can have a jacket structure with a radially inner laminate layer and a radially outer laminate layer.
  • the laminate layers can have different fiber materials, wherein the radially inner laminate layer can remain undamaged when the planar connection surfaces are formed.
  • the fiber composite plastic for example, a carbon fiber reinforced, preferably a continuous carbon fiber reinforced plastic (CFRP), or a glass fiber reinforced, preferably an endless glass fiber reinforced plastic (GRP) be.
  • various fiber materials may be used depending on the desired requirements such as stiffness, strength, impact detection, etc.
  • the layers of the inner laminate layer made of carbon fibers the layers of the outer laminate layer of glass fibers can be produced. Due to the superficial damage of the outer laminate layer for the representation of the planar bonding surfaces in the milling process, only the glass fibers but not the carbon fibers of the inner laminar layer are released. Therefore, the structural properties of the carbon fiber matrix composite are maintained, and corrosive interactions with metallic components in the area of connection of the body structure of the vehicle can be avoided.
  • the outer shell may be a fluid-tight inner container made of metal or fiber-reinforced Surround plastic or unreinforced plastic surface or form the fluid-tight inner container itself.
  • the respective winding mandrel may have a polygonal cross-section adapted at least in the region of the fastening elements to be formed, and a polygonal cross-section adapted to the planar surfaces to be formed.
  • FIG. 1 shows a schematic perspective view of an inner container for a pressure vessel according to the invention
  • FIG. 2 is a schematic perspective view of the inner container of FIG. 1 wrapped in an outer sheath in front of a mechanical machining
  • FIG. 3 is a schematic sectional view of the outer shell in the region of a hollow cylindrical extension
  • FIG. 4 shows an illustration of a detail IV from FIG. 3;
  • FIG. 5 shows a schematic perspective view of an embodiment of a pressure vessel according to the invention.
  • FIG. 6 shows an illustration of a detail VI from FIG. 6.
  • the exemplary embodiment of a pressure vessel 10 according to the invention comprises an outer shell 12, which has a cylinder-like central area 14 and two adjoining it. . . HYde end portions 16, 18 has. At both axial ends of the cylinder-like middle region 14 of the outer shell 12, a hollow cylindrical extension 20 is formed, which projects beyond the respective end region 16, 18.
  • the respective hollow-cylindrical extension 20 merges at its open end into a plurality of fastening elements 36, which each have a plane connection surface 38 arranged radially on the outside.
  • the outer shell 12 encloses the fluid-tight inner container 11 in the illustrated embodiment in a planar manner.
  • the fluid-tight inner container 11 can be produced, for example, from metal or from fiber-reinforced plastic (CFRP, GFRP) or from unreinforced plastic.
  • the outer shell 12 itself can form the fluid-tight inner container 11.
  • the outer shell 12 is made of a fiber-reinforced, preferably a continuous fiber reinforced plastic (CFRP, GFRP), which, for example, a carbon fiber reinforced, preferably a continuous carbon fiber reinforced plastic (CFRP) and / or a glass fiber reinforced, preferably an endless glass fiber reinforced plastic (GRP) is.
  • the inner container 1 1 shown in FIG. 1 and winding mandrels, not shown at both ends, are wound with an endless fiber material, so that at both axial ends 16, 18 a cylindrical projection 20 is formed in each case of the cylin-like central region 14 of the outer shell 12, which protrudes beyond the respective end region 16, 18, as can be seen further from FIG. 2.
  • the wound continuous fiber material is provided with a matrix material.
  • the continuous fibers may already be preimpregnated with the matrix system.
  • the outer shell 12 hardens.
  • the respective winding mandrel has, at least in the region of the fastening elements 36 to be formed, a polygonal cross section adapted to the contact surfaces 38 to be formed.
  • the hollow cylindrical extensions 20 of the outer shell 12 have a round outer contour 24 and a polygonal inner contour 22 with flat inner surfaces 26 and round inner surfaces 28.
  • the inner contour 22 is designed with sixteen corners with eight planar and eight round alternating inner surfaces 26, 28. In the angular regions of the planar inner surfaces 26, the winding radius of the inner contour 22 is significantly greater than at the circular inner surfaces 28 of the inner contour. As a result, the thread tension in the winding process is unequal, which is why, in the areas with higher radii, detachment of the thread from the tool core can occur. Due to the constant radius of the outer contour 24 of the shell structure 30 of the outer shell 12, a higher wall thickness and thus a partially lower fiber volume content are formed in these regions.
  • the outer shell 12 at least in the region of the fastening elements 36, has a jacket structure 30 with a radially inner laminate layer 32 and a radially outer one Laminate layer 34 on.
  • Various fiber materials can be used according to the desired requirements, such as stiffness, strength, impact detection, etc., to generate the cladding structure 30.
  • the inner laminate layer 32 is made of carbon fiber layers
  • the outer laminate layer 34 is made of fiberglass layers.
  • the extensions 20 are machined in accordance with the invention in such a way that the fastening elements 36 with the respective planar connection surfaces 38 are formed therefrom.
  • the fastening elements 36 are introduced into the respective hollow-cylindrical extension 20 by a first machining, for example by milling or cutting.
  • the planar connection surfaces 38 are introduced into the fastening elements 36 by a second machining operation, for example by milling.
  • the fastening elements 36 are designed as tabs 36A, which each have a fastening opening. Through the mounting holes screws can be performed to screw the pressure vessel 10 with a body structure, not shown, of a vehicle.
  • planar attachment surfaces 38 are formed in the region of the planar inner surfaces 26. Furthermore, the radially inner laminate layer 32 remains undamaged when the planar connection surfaces 38 are formed. Thus, only the glass fibers of the outer laminate layer 34 but not the carbon fibers of the inner laminate layer 32 are released by the surface damage of the outer laminate layer 34 to depict the planar bonding surfaces 38 in the milling process. Therefore, the structural properties of the carbon fiber matrix composite of the inner laminate layer 32 are advantageously maintained. In addition, corrosive interactions are avoided to Metalli's components in the connection area of the body structure of the vehicle in an advantageous manner. LIST OF REFERENCE NUMBERS

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Abstract

The invention relates to a pressurised container (10) and to a method for producing an outer casing (12) for a pressurised container (10) of this type. The pressurised container (10) comprises an outer casing (12), which has a cylinder-like central region (10) and two end regions (16, 18) attached thereto, a hollow-cylindrical extension (20) being formed in each case at both axial ends of the cylinder-like central region (14) of the outer casing (12), which extension projects beyond the respective end region (16, 18). According to the invention, each hollow-cylindrical extension (20) transitions at the open end thereof into a plurality of fastening elements (36), each of which has a planar connection face (38) arranged radially externally.

Description

Druckbehälter sowie Verfahren zur Herstellung einer Außenhülle für einen  Pressure vessel and method for producing an outer shell for a
Druckbehälter  pressure vessel
BESCHREIBUNG: DESCRIPTION:
Die Erfindung betrifft einen Druckbehälter gemäß der Gattung des Patentan- spruchs 1. Des Weiteren betrifft die Erfindung ein Verfahren zur Herstellung einer Außenhülle für einen solchen Druckbehälter. Druckbehälter und korrespondierende Verfahren zur Herstellung einer Außen- hülle für einen solchen Druckbehälter sind in zahlreichen Variationen bekannt. Allgemein können solche Druckbehälter beispielsweise mit Gasen oder druck- verflüssigten Gasen befüllt werden und daher eine erhebliche Energiemenge speichern. So kann beispielsweise ein sogenannter Typ-4-Hochdruckbehälter für komprimiertes Erdgas in einem heckseitigen Laderaum und/oder unter- flurig im Bereich eines Mitteltunnels der Fahrzeugkarosserie eines Fahrzeugs verbaut sein, welches mit Erdgas betrieben wird. The invention relates to a pressure vessel according to the preamble of patent claim 1. Furthermore, the invention relates to a method for producing an outer shell for such a pressure vessel. Pressure vessels and corresponding methods for producing an outer shell for such a pressure vessel are known in numerous variations. In general, such pressure vessels can be filled, for example, with gases or pressure-liquefied gases and therefore store a considerable amount of energy. Thus, for example, a so-called type 4 high-pressure container for compressed natural gas can be installed in a rear-side loading space and / or below ground in the area of a center tunnel of the vehicle body of a vehicle which is operated with natural gas.
Ein häufig eingesetztes Verfahren zur Befestigung von Druckbehältern im Fahrzeug bzw. unter dem Fahrzeug verwendet Tankspannbänder, welche ei- nen Toleranzausgleich beim Befüllen des Behälters ermöglichen, jedoch kei- nen strukturellen Einfluss der Behältersteifigkeit auf die Karosserie des Fahr- zeugs bieten. Zudem ist ein Ausweichen des Drucktanks bei plastischer Ver- formung der Karosserie, beispielsweise bei einem Seitencrash gewährleistet, wodurch der Schutz vor Beschädigung des Drucktanks sichergestellt werden soll. Somit erfolgt die Übertragung der Crashenergie einzig durch die Bauteile bzw. Lastpfade der Karosserie. Ein gattungsgemäßer Druckbehälter weist bevorzugt eine zylindrische Bau- form auf, bei der ein zylindrischer Druckbehältermantel durch nach außen ge- wölbte, stirnseitige Böden beidseitig verschlossen ist. Die Druckbehälterwand kann beispielsweise dreilagig aufgebaut sein und eine Innenlage, eine Mittel lage aus einem Faserverbundkunststoff sowie eine Außenlage aus einem wei- teren Faserverbundkunststoff umfassen. In dem oben erwähnten Typ-4-Hoch- druckbehälter ist die Innenlage ein Kunststoff-Liner, der über Blasformen oder Rotations-/Sinter-Verfahren oder Thermoformverfahren hergestellt ist. Die den Kunststoff-Liner verstärkende Mittellage ist bevorzugt in einem Nasswickelver- fahren als eine Faserwicklung auf den Kunststoff-Liner aufgewickelt. Exemp- larisch besteht die Faserwicklung aus zum Beispiel Kohlenstoff-, Aramid-, Glas- und/oder Borfasern, die in einer Matrix aus Duromeren oder aus Ther- moplasten eingebettet sind. Die Fasern sind in unterschiedlichen Faserorien- tierungen auf den Kunststoff-Liner aufgebracht. Die bevorzugt schlagabsor- bierende Außenlage kann ebenfalls eine Faserwicklung sein, die in einem Nasswickelverfahren auf die Mittellage aufgewickelt wird. Die so gebildete Au- ßenwicklung besteht beispielhaft aus Kohlenstoff- und/oder Glasfasern, die in einer Matrix eingebettet sind. A frequently used method for fastening pressure vessels in the vehicle or under the vehicle uses tank straps, which allow a tolerance compensation when filling the container, but do not offer a structural influence of the container stiffness on the body of the vehicle. In addition, a deflection of the pressure tank is ensured in plastic deformation of the body, for example in a side crash, which is to ensure protection against damage to the pressure tank. Thus, the transmission of the crash energy takes place solely by the components or load paths of the body. A generic pressure vessel preferably has a cylindrical construction, in which a cylindrical pressure vessel jacket is closed on both sides by bulged, outwardly curved bottoms. The pressure vessel wall can be constructed, for example, in three layers and comprise an inner layer, a middle layer of a fiber composite plastic and an outer layer of a further fiber composite plastic. In the above-mentioned type 4 high pressure vessel, the inner layer is a plastic liner made by blow molding or rotary / sintering process or thermoforming process. The plastic liner reinforcing middle layer is preferably wound in a wet winding process as a fiber winding on the plastic liner. Specifically, the fiber winding consists of, for example, carbon, aramid, glass and / or boron fibers embedded in a matrix of thermosets or thermoplasts. The fibers are applied to the plastic liner in different fiber orientations. The preferably impact-absorbing outer layer may likewise be a fiber winding which is wound onto the middle layer in a wet winding process. The outer winding thus formed consists, for example, of carbon and / or glass fibers embedded in a matrix.
Der fertiggestellte Hochdruckbehälter weist beispielsweise an einem stirnsei tigen Behälterboden ein nach außen abragendes Halsstück auf, in das ein Ventil integriert ist. Ansonsten ist Hochdruckbehälter außen seitig meist kom- plett glattflächig ausgeführt. In seiner Einbaulage ist der Hochdruckbehälter in gängiger Praxis mittels Spannbänder lagegesichert, die die glattflächige Zylin derwand des Hochdruckbehälters umgreifen. The finished high pressure container has, for example, on a stirnsei term container bottom on an outwardly projecting neck piece, in which a valve is integrated. Otherwise, the high-pressure vessel is usually completely smooth on the outside. In its installed position, the high-pressure container is positionally secured in position by means of tension bands, which surround the smooth surface Zylin derwand the high-pressure vessel.
Aus der DE 10 2015 206 826 A1 ist ein Druckbehälter für ein Kraftfahrzeug, mit einer Befestigungsvorrichtung bekannt. Die Befestigungsvorrichtung ist ausgebildet, den Druckbehälter mit einer Karosserie des Kraftfahrzeuges zu verbinden. Die Befestigungsvorrichtung umfasst mindestens zwei Verbin- dungstifte und mindestens zwei Lager. Jeweils ein Verbindungsstift ist mit ei- nem Lager in einem Verbindungspunkt verbunden. Die Verbindungsstifte und/oder die Lager sind jeweils mit dem Druckbehälter in einem Druckbehäl- teranschlussbereich verbunden und erstrecken sich von der Außenoberfläche des Druckbehälters weg. Die Druckbehälteranschlussbereiche weisen jeweils eine Ausdehnung auf. Der Verbindungsstift und das Lager sind im Verbin- dungspunkt zumindest bereichsweise derart geformt und angeordnet, dass die Ausdehnung E durch eine Bewegung des Lagers und/oder des Verbindungs- stiftes mit nur einem translatorischen Freiheitsgrad kinematisch geführt wird. From DE 10 2015 206 826 A1 a pressure vessel for a motor vehicle, with a fastening device is known. The fastening device is designed to connect the pressure vessel with a body of the motor vehicle. The fastening device comprises at least two connecting pins and at least two bearings. In each case a connecting pin is connected to a bearing in a connection point. The connecting pins and / or the bearings are each connected to the pressure vessel in a pressure tank connection area and extend from the outer surface away from the pressure vessel. The pressure tank connection areas each have an extension. The connecting pin and the bearing are formed and arranged in the connection point at least in regions such that the extension E is guided kinematically by a movement of the bearing and / or the connecting pin with only one translational degree of freedom.
Aus der DE 10 2015 007 047 B4 ist ein Verfahren zur Herstellung eines mit Druck beaufschlagbaren Behälters bekannt, welcher ein aus einem Faser- kunststoffverbundmaterial hergestelltes, zylindrisches Mittelteil aufweist, an dessen Enden zur Schließung des Behälters jeweils ein Bodenteil aus einem Faserkunststoffverbundmaterial hergestellt wird. Hierbei wird das Mittelteil des Behälters auf einem Wickeldorn eines Wickelkörpers als vorgefertigtes Mittel- teil angeordnet oder durch Aufwickeln eines Rovings hergestellt. Eine Innen- fläche des Bodenteils wird durch den Wickeldorn des Wickel körpers sowie ein an das Bodenteil angrenzendes Ende des Mittelteils definiert, und eine Außen- fläche des Bodenteils wird durch mehrere Formgebungsteile definiert. Das Bo- denteil des Behälters wird durch Aufwickeln eines vorzugsweise unidirektiona- len Rovings in einen durch den Wickeldorn und die Formgebungsteile definier- ten Wickelraum bis zu dem Ende des Mittelteils hergestellt, wobei die Form- gebungsteile nacheinander von einer Wickelachse des Wickel körpers begin- nend nach außen auf der Wickelachse angeordnet werden, wenn ein zwischen dem Wickeldorn und dem jeweils vorher angeordneten Formgebungsteil ge- bildeter Teilwickelraum ausgefüllt ist. From DE 10 2015 007 047 B4 a process for producing a pressurizable container is known, which has a made of a fiber-plastic composite, cylindrical central part, at the ends of each of which a bottom part of a fiber-reinforced plastic composite material is made to close the container. In this case, the middle part of the container is arranged on a winding mandrel of a wound body as a prefabricated middle part or produced by winding up a roving. An inner surface of the bottom part is defined by the winding mandrel of the winding body and an end of the central part adjacent to the bottom part, and an outer surface of the bottom part is defined by a plurality of shaping parts. The bottom part of the container is produced by winding a preferably unidirectional roving into a winding space defined by the winding mandrel and the shaping parts up to the end of the middle part, the shaping parts starting successively from a winding axis of the winding body be arranged on the outside of the winding axis when a part winding space formed between the winding mandrel and the respective previously arranged shaping part is filled.
Aufgabe der vorliegenden Erfindung ist es, einen Druckbehälter sowie ein Ver- fahren zur Herstellung einer Außenhülle für einen solchen Druckbehälter be- reitzustellen, welcher in einfacher Weise als Versteifungselement in die Karos- seriestruktur eingebunden werden kann. The object of the present invention is to provide a pressure vessel and a method for producing an outer shell for such a pressure vessel, which can be integrated into the body structure in a simple manner as a stiffening element.
Diese Aufgabe wird durch einen Druckbehälter mit den Merkmalen des Pa- tentanspruchs 1 und durch ein Verfahren zur Herstellung einer Außenhülle für einen Druckbehälter mit den Merkmalen des Patentanspruchs 1 1 gelöst. Vor teilhafte Ausgestaltungen mit zweckmäßigen Weiterbildungen der Erfindung sind in den abhängigen Patentansprüchen angegeben. Um einen Druckbehälter sowie ein Verfahren zur Herstellung einer Außenhülle für einen solchen Druckbehälter bereitzustellen, welcher in einfacher Weise als Versteifungselement in die Karosseriestruktur eingebunden werden kann, ist an beiden axialen Enden eines zylinderähnlichen Mittelbereichs einer Au- ßenhülle jeweils ein hohlzylindrischer Fortsatz ausgebildet, welcher über den jeweiligen Endbereich übersteht und an seinem offenen Ende in mehrere Be- festigungselemente übergeht, welche jeweils eine radial außen angeordnete plane Anbindungsfläche aufweisen. This object is achieved by a pressure vessel having the features of patent claim 1 and by a method for producing an outer shell for a pressure vessel having the features of patent claim 11. Before some embodiments with expedient developments of the invention are specified in the dependent claims. In order to provide a pressure vessel and a method for producing an outer shell for such a pressure vessel, which can be integrated in a simple manner as stiffening element in the body structure, a hollow cylindrical extension is formed at both axial ends of a cylinder-like central region of an outer shell, which over the projects beyond the respective end region and merges at its open end into a plurality of fastening elements which each have a plane connection surface arranged radially on the outside.
Das Verfahren zur Herstellung einer Außenhülle für einen solchen Druckbe- hälter umfasst die Schritte: Umwickeln eines Innenbehälters und/oder eines jeweiligen sich axial an diesen anschließenden Wickeldorns mit einem End- losfasermaterial, so dass an beiden axialen Enden des zylinderähnlichen Mit telbereichs der Außenhülle jeweils ein hohlzylindrischer Fortsatz ausgebildet ist, welcher über den jeweiligen Endbereich übersteht. Aushärten der Außen- hülle und mechanisches Bearbeiten des jeweiligen Fortsatzes erfolgen derart, dass daraus die Befestigungselemente mit den jeweiligen planen Anschluss- flächen ausgeformt werden. Hierbei kann das gewickelte Endlosfasermaterial vor dem Aushärten mit einem Matrixmaterial versehen werden. Alternativ kön- nen die Endlosfasern bereits mit dem Matrixsystem vorimprägniert sein. The method for producing an outer shell for such a pressure vessel comprises the steps of: wrapping an inner container and / or a respective winding mandrel adjoining axially thereto with a continuous fiber material, so that at both axial ends of the cylinder-like middle region of the outer shell hollow cylindrical extension is formed, which projects beyond the respective end region. Curing of the outer shell and mechanical processing of the respective extension take place in such a way that the fastening elements with the respective planar connection surfaces are formed therefrom. Here, the wound continuous fiber material can be provided with a matrix material before curing. Alternatively, the continuous fibers may already be preimpregnated with the matrix system.
In vorteilhafter Ausgestaltung des Druckbehälters können die Befestigungs- elemente als Laschen ausgeführt werden. Hierbei können die Laschen jeweils eine Öffnung aufweisen, durch welche eine Schraube geführt werden kann, um den Druckbehälter mit der Karosseriestruktur zu verschrauben. In an advantageous embodiment of the pressure vessel, the fastening elements can be designed as tabs. In this case, the tabs may each have an opening through which a screw can be guided in order to screw the pressure vessel to the body structure.
In weiterer vorteilhafter Ausgestaltung des Druckbehälters können die Befes- tigungselemente durch eine erste spanabhebende Nachbearbeitung, insbe- sondere durch Fräsen oder Schneiden, in den hohlzylindrischen Fortsatz ein- gebracht werden. Die planen Anbindungsflächen können dann durch eine zweite spanabhebende Nachbearbeitung, insbesondere durch Fräsen, in die Befestigungselemente eingebracht werden. In weiterer vorteilhafter Ausgestaltung des Druckbehälters kann zumindest der hohlzylindrische Fortsatz der Außenhülle eine runde Außenkontur und eine vieleckige Innenkontur mit planen Innenflächen und/oder runden Innenflächen aufweisen. Zudem können die planen Anbindungsflächen im Bereich der pla nen Innenflächen ausgebildet werden. Dadurch können beliebig viele Anbin- dungsflächen in unterschiedlichen Winkelpositionen realisiert werden. Die An- bindungsbereiche können somit innerhalb der Drehachse frei positioniert und fahrzeugunabhängig ausgelegt werden. In a further advantageous embodiment of the pressure vessel, the fastening elements can be introduced into the hollow cylindrical extension by a first machining operation, in particular by milling or cutting. The planar connection surfaces can then be introduced into the fastening elements by a second machining operation, in particular by milling. In a further advantageous embodiment of the pressure vessel, at least the hollow cylindrical extension of the outer shell may have a round outer contour and a polygonal inner contour with flat inner surfaces and / or round inner surfaces. In addition, the planar connection surfaces can be formed in the region of the pla nen inner surfaces. As a result, any number of connection surfaces in different angular positions can be realized. The connection areas can thus be freely positioned within the axis of rotation and designed independently of the vehicle.
In weiterer vorteilhafter Ausgestaltung des Druckbehälters kann die Außen- hülle aus einem faserverstärkten, vorzugsweise einem endlosfaserverstärkten Kunststoff gefertigt werden. Zudem kann die Außenhülle zumindest im Bereich der Befestigungselemente eine Mantelstruktur mit einer radial inneren Lami- natschicht und einer radial äußeren Laminatschicht aufweisen. Hierbei können die Laminatschichten verschiedene Fasermaterialien aufweisen, wobei die ra- dial innere Laminatschicht beim Ausformen der planen Anschlussflächen un- beschädigt bleiben kann. Der Faserverbundkunststoff kann beispielsweise ein kohlefaserverstärkter, vorzugsweise ein endloskohlefaserverstärkter Kunst stoff (CFK), oder ein glasfaserverstärkter, vorzugsweise ein endlosglasfaser- verstärkter Kunststoff (GFK) sein. Bei der Herstellung der Außenhülle können verschiedene Faserwerkstoffe in Abhängigkeit der gewünschten Anforderun- gen, wie beispielsweise Steifigkeit, Festigkeit, Impact-Detektierung, usw., ver- wendet werden. Hierbei können beispielsweise die Lagen der inneren Lami- natschicht aus Kohlefasern, die Lagen der äußeren Laminatschicht aus Glas- fasern hergestellt werden. Durch die oberflächliche Beschädigung der äuße- ren Laminatschicht zur Darstellung der planen Anbindungsflächen im Fräsvor- gang werden nur die Glasfasern jedoch nicht die Kohlefasern der inneren La- minatschicht freigesetzt. Daher bleiben die strukturellen Eigenschaften des Kohlefasermatrixverbunds erhalten, zudem können korrosive Wechselwirkun- gen zu metallischen Bauteilen im Anbindungsbereich der Karosseriestruktur des Fahrzeugs vermieden werden. In a further advantageous embodiment of the pressure vessel, the outer shell can be made of a fiber-reinforced, preferably a continuous fiber reinforced plastic. In addition, at least in the region of the fastening elements, the outer shell can have a jacket structure with a radially inner laminate layer and a radially outer laminate layer. In this case, the laminate layers can have different fiber materials, wherein the radially inner laminate layer can remain undamaged when the planar connection surfaces are formed. The fiber composite plastic, for example, a carbon fiber reinforced, preferably a continuous carbon fiber reinforced plastic (CFRP), or a glass fiber reinforced, preferably an endless glass fiber reinforced plastic (GRP) be. In the production of the outer shell, various fiber materials may be used depending on the desired requirements such as stiffness, strength, impact detection, etc. In this case, for example, the layers of the inner laminate layer made of carbon fibers, the layers of the outer laminate layer of glass fibers can be produced. Due to the superficial damage of the outer laminate layer for the representation of the planar bonding surfaces in the milling process, only the glass fibers but not the carbon fibers of the inner laminar layer are released. Therefore, the structural properties of the carbon fiber matrix composite are maintained, and corrosive interactions with metallic components in the area of connection of the body structure of the vehicle can be avoided.
In weiterer vorteilhafter Ausgestaltung des Druckbehälters kann die Außen- hülle einen fluiddichten Innenbehälter aus Metall oder aus faserverstärktem Kunststoff oder aus unverstärktem Kunststoff flächig umschließen oder den fluiddichten Innenbehälter selbst ausbilden. In a further advantageous embodiment of the pressure vessel, the outer shell may be a fluid-tight inner container made of metal or fiber-reinforced Surround plastic or unreinforced plastic surface or form the fluid-tight inner container itself.
In vorteilhafter Ausgestaltung des Verfahrens zur Herstellung einer Außen- hülle für einen solchen Druckbehälter kann der jeweilige Wickeldorn zumindest im Bereich der auszubildenden Befestigungselemente einen polygonalen und auf die auszubildenden planen Anschlussflächen angepassten polygonalen Querschnitt aufweisen. Dadurch entstehen für die Innenkontur der Mantel- struktur der Außenhülle unterschiedliche Radien in den Bereichen der runden Innenflächen und den Bereichen der planen Innenflächen. Dadurch ist die Fa- denspannung im Wickelprozess ungleich, weshalb in den Bereichen mit höhe- ren Radien Ablösungen des Fadens zum Werkzeugkern entstehen können. Es bilden sich in diesen Bereichen aufgrund des konstanten Radius der Au- ßenkontur der Mantelstruktur der Außenhülle eine höhere Wanddicke und so- mit ein partiell niedrigerer Faservolumengehalt aus. In an advantageous embodiment of the method for producing an outer shell for such a pressure vessel, the respective winding mandrel may have a polygonal cross-section adapted at least in the region of the fastening elements to be formed, and a polygonal cross-section adapted to the planar surfaces to be formed. This results in different radii in the areas of the round inner surfaces and the areas of the flat inner surfaces for the inner contour of the shell structure of the outer shell. As a result, the thread tension in the winding process is unequal, which is why detachment of the thread from the tool core can occur in areas with higher radii. Due to the constant radius of the outer contour of the shell structure of the outer shell, a higher wall thickness and thus a partially lower fiber volume content are formed in these areas.
Die vorstehend in der Beschreibung genannten Merkmale und Merkmalskom- binationen sowie die nachfolgend in der Figurenbeschreibung genannten und/oder in den Figuren alleine gezeigten Merkmale und Merkmalskombinati- onen sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar, ohne den Rahmen der Erfindung zu verlassen. Es sind somit auch Ausführungen als von der Er findung umfasst und offenbart anzusehen, die in den Figuren nicht explizit ge- zeigt oder erläutert sind, jedoch durch separierte Merkmalskombinationen aus den erläuterten Ausführungen hervorgehen und erzeugbar sind. The features and feature combinations mentioned above in the description, as well as the features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respectively indicated combination but also in other combinations or alone, without departing from the scope of the invention. Thus, embodiments are also included and disclosed by the invention, which are not explicitly shown or explained in the figures, but which emerge and can be generated by separated combinations of features from the embodiments explained.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. In der Zeichnung be- zeichnen gleiche Bezugszeichen Komponenten bzw. Elemente, die gleiche bzw. analoge Funktionen ausführen. Hierbei zeigen: An embodiment of the invention is illustrated in the drawing and will be explained in more detail in the following description. In the drawing, like reference numerals denote components or elements that perform the same or analog functions. Hereby show:
Fig. 1 eine schematische perspektivische Darstellung eines Innenbe- hälters für einen erfindungsgemäßen Druckbehälter; Fig. 2 eine schematische perspektivische Darstellung des mit einer Au- ßenhülle umwickelten Innenbehälters aus Fig. 1 vor einer me chanischen Bearbeitung; Fig. 3 eine schematische Schnittdarstellung der Außenhülle im Bereich eines hohlzylindrischen Fortsatzes, 1 shows a schematic perspective view of an inner container for a pressure vessel according to the invention; FIG. 2 is a schematic perspective view of the inner container of FIG. 1 wrapped in an outer sheath in front of a mechanical machining; FIG. 3 is a schematic sectional view of the outer shell in the region of a hollow cylindrical extension,
Fig. 4 eine Darstellung eines Details IV aus Fig. 3, Fig. 5 eine schematische perspektivische Darstellung eines Ausfüh- rungsbeispiels eines erfindungsgemäßen Druckbehälters; und 4 shows an illustration of a detail IV from FIG. 3; FIG. 5 shows a schematic perspective view of an embodiment of a pressure vessel according to the invention; and
Fig. 6 eine Darstellung eines Details VI aus Fig. 6. Wie aus Fig. 1 bis 6 ersichtlich ist, umfasst das dargestellte Ausführungsbei- spiel eines erfindungsgemäßen Druckbehälters 10 eine Außenhülle 12, wel- che einen zylinderähnlichen Mittelbereich 14 und zwei sich daran anschlie- ßende Endbereiche 16, 18 aufweist. An beiden axialen Enden des zylinder- ähnlichen Mittelbereichs 14 der Außenhülle 12 ist jeweils ein hohlzylindrischer Fortsatz 20 ausgebildet, welcher über den jeweiligen Endbereich 16, 18 über- steht. 6 shows an illustration of a detail VI from FIG. 6. As can be seen from FIGS. 1 to 6, the exemplary embodiment of a pressure vessel 10 according to the invention comprises an outer shell 12, which has a cylinder-like central area 14 and two adjoining it. ßende end portions 16, 18 has. At both axial ends of the cylinder-like middle region 14 of the outer shell 12, a hollow cylindrical extension 20 is formed, which projects beyond the respective end region 16, 18.
Erfindungsgemäß geht der jeweilige hohlzylindrische Fortsatz 20 an seinem offenen Ende in mehrere Befestigungselemente 36 über, welche jeweils eine radial außen angeordnete plane Anbindungsfläche 38 aufweisen. According to the invention, the respective hollow-cylindrical extension 20 merges at its open end into a plurality of fastening elements 36, which each have a plane connection surface 38 arranged radially on the outside.
Wie aus Fig. 2 und 5 weiter ersichtlich ist, umschließt die Außenhülle 12 im dargestellten Ausführungsbeispiel den fluiddichten Innenbehälter 1 1 flächig. Der fluiddichte Innenbehälter 1 1 kann beispielsweise aus Metall oder aus fa- serverstärktem Kunststoff (CFK, GFK) oder aus unverstärktem Kunststoff her- gestellt werden. Alternativ kann die Außenhülle 12 selbst den fluiddichten In- nenbehälter 1 1 ausbilden. Die Außenhülle 12 ist aus einem faserverstärkten, vorzugsweise einem endlosfaserverstärkten Kunststoff (CFK, GFK) gefertigt, welcher beispielweise ein kohlefaserverstärkter, vorzugsweise ein endloskohlefaserverstärkter Kunststoff (CFK) und/oder ein glasfaserverstärk- ter, vorzugsweise ein endlosglasfaserverstärkter Kunststoff (GFK) ist. As is further apparent from FIGS. 2 and 5, the outer shell 12 encloses the fluid-tight inner container 11 in the illustrated embodiment in a planar manner. The fluid-tight inner container 11 can be produced, for example, from metal or from fiber-reinforced plastic (CFRP, GFRP) or from unreinforced plastic. Alternatively, the outer shell 12 itself can form the fluid-tight inner container 11. The outer shell 12 is made of a fiber-reinforced, preferably a continuous fiber reinforced plastic (CFRP, GFRP), which, for example, a carbon fiber reinforced, preferably a continuous carbon fiber reinforced plastic (CFRP) and / or a glass fiber reinforced, preferably an endless glass fiber reinforced plastic (GRP) is.
Gemäß dem Verfahren zur Herstellung einer Außenhülle 12 für einen Druck- behälter 10 wird der in Fig. 1 dargestellte Innenbehälter 1 1 und sich an beiden Enden axial anschließende nicht dargestellte Wickeldorne mit einem Endlos- fasermaterial umwickelt, so dass an beiden axialen Enden 16, 18 des zylin derähnlichen Mittelbereichs 14 der Außenhülle 12 jeweils ein hohlzylindrischer Fortsatz 20 ausgebildet wird, welcher über den jeweiligen Endbereich 16, 18 übersteht, wie aus Fig. 2 weiter ersichtlich ist. Anschließend wird das gewi- ckelte Endlosfasermaterial mit einem Matrixmaterial versehen. Alternativ kön- nen die Endlosfasern bereits mit dem Matrixsystem vorimprägniert sein. An- schließend härtet die Außenhülle 12 aus. Im dargestellten Ausführungsbei- spiel weist der jeweilige Wickeldorn zumindest im Bereich der auszubildenden Befestigungselemente 36 einen polygonalen und auf die auszubildenden pla nen Anschlussflächen 38 angepassten polygonalen Querschnitt auf. According to the method for producing an outer shell 12 for a pressure vessel 10, the inner container 1 1 shown in FIG. 1 and winding mandrels, not shown at both ends, are wound with an endless fiber material, so that at both axial ends 16, 18 a cylindrical projection 20 is formed in each case of the cylin-like central region 14 of the outer shell 12, which protrudes beyond the respective end region 16, 18, as can be seen further from FIG. 2. Subsequently, the wound continuous fiber material is provided with a matrix material. Alternatively, the continuous fibers may already be preimpregnated with the matrix system. Subsequently, the outer shell 12 hardens. In the illustrated exemplary embodiment, the respective winding mandrel has, at least in the region of the fastening elements 36 to be formed, a polygonal cross section adapted to the contact surfaces 38 to be formed.
Wie aus Fig. 3 und 4 weiter ersichtlich ist, weisen zumindest die hohlzylindri schen Fortsätze 20 der Außenhülle 12 eine runde Außenkontur 24 und eine vieleckige Innenkontur 22 mit planen Innenflächen 26 und runden Innenflä- chen 28 auf. Wie aus Fig. 3 und 4 weiter ersichtlich ist, ist die Innenkontur 22 sechzehneckig mit acht planen und acht runden sich abwechselnden Innen- flächen 26, 28 ausgeführt. In den Winkelbereichen der planen Innenflächen 26 ist der Wickelradius der Innenkontur 22 deutlich größer als an den runden In- nenflächen 28 der Innenkontur. Dadurch ist die Fadenspannung im Wickelpro- zess ungleich, weshalb in den Bereichen mit höheren Radien Ablösungen des Fadens zum Werkzeug kern entstehen können. Es bilden sich in diesen Berei- chen aufgrund des konstanten Radius der Außenkontur 24 der Mantelstruktur 30 der Außenhülle 12 eine höhere Wanddicke und somit ein partiell niedrigerer Faservolumengehalt aus. As is further apparent from FIGS. 3 and 4, at least the hollow cylindrical extensions 20 of the outer shell 12 have a round outer contour 24 and a polygonal inner contour 22 with flat inner surfaces 26 and round inner surfaces 28. As can also be seen from FIGS. 3 and 4, the inner contour 22 is designed with sixteen corners with eight planar and eight round alternating inner surfaces 26, 28. In the angular regions of the planar inner surfaces 26, the winding radius of the inner contour 22 is significantly greater than at the circular inner surfaces 28 of the inner contour. As a result, the thread tension in the winding process is unequal, which is why, in the areas with higher radii, detachment of the thread from the tool core can occur. Due to the constant radius of the outer contour 24 of the shell structure 30 of the outer shell 12, a higher wall thickness and thus a partially lower fiber volume content are formed in these regions.
Wie insbesondere aus Fig. 3 und 4 weiter ersichtlich ist, weist die Außenhülle 12 zumindest im Bereich der Befestigungselemente 36 eine Mantelstruktur 30 mit einer radial inneren Laminatschicht 32 und einer radial äußeren Laminatschicht 34 auf. Zur Generierung der Mantelstruktur 30 können ver- schiedene Faserwerkstoffe gemäß den gewünschten Anforderungen, wie Steifigkeit, Festigkeit, Impact-Detektierung usw. verwendet werden. Im darge- stellten Ausführungsbeispiel ist die innere Laminatschicht 32 aus Kohlefaser- lagen hergestellt, und die äußere Laminatschicht 34 ist aus Glasfaserlagen hergestellt. As can also be seen in particular from FIGS. 3 and 4, the outer shell 12, at least in the region of the fastening elements 36, has a jacket structure 30 with a radially inner laminate layer 32 and a radially outer one Laminate layer 34 on. Various fiber materials can be used according to the desired requirements, such as stiffness, strength, impact detection, etc., to generate the cladding structure 30. In the illustrated embodiment, the inner laminate layer 32 is made of carbon fiber layers, and the outer laminate layer 34 is made of fiberglass layers.
Nach dem Aushärten der Außenhülle 12 werden die Fortsätze 20 erfindungs- gemäß derart mechanisch bearbeitet, dass daraus die Befestigungselemente 36 mit den jeweiligen planen Anschlussflächen 38 ausgeformt werden . Hierbei werden die Befestigungselemente 36 durch eine erste spanabhebende Nach- bearbeitung, beispielsweise durch Fräsen oder Schneiden, in den jeweiligen hohlzylindrischen Fortsatz 20 eingebracht. Anschließend werden die planen Anbindungsflächen 38 durch eine zweite spanabhebende Nachbearbeitung, beispielsweise durch Fräsen, in die Befestigungselemente 36 eingebracht. Wie aus Fig. 5 und 6 weiter ersichtlich ist, sind die Befestigungselemente 36 im dargestellten Ausführungsbeispiel als Laschen 36A ausgeführt, welche je- weils eine Befestigungsöffnung aufweisen. Durch die Befestigungsöffnungen können Schrauben geführt werden, um den Druckbehälter 10 mit einer nicht dargestellten Karosseriestruktur eines Fahrzeugs zu verschrauben. After curing of the outer shell 12, the extensions 20 are machined in accordance with the invention in such a way that the fastening elements 36 with the respective planar connection surfaces 38 are formed therefrom. In this case, the fastening elements 36 are introduced into the respective hollow-cylindrical extension 20 by a first machining, for example by milling or cutting. Subsequently, the planar connection surfaces 38 are introduced into the fastening elements 36 by a second machining operation, for example by milling. As can also be seen from FIGS. 5 and 6, in the exemplary embodiment illustrated, the fastening elements 36 are designed as tabs 36A, which each have a fastening opening. Through the mounting holes screws can be performed to screw the pressure vessel 10 with a body structure, not shown, of a vehicle.
Zudem sind die planen Anbindungsflächen 38 im Bereich der planen Innenflä- chen 26 ausgebildet. Des Weiteren bleibt die radial innere Laminatschicht 32 beim Ausformen der planen Anschlussflächen 38 unbeschädigt. Somit werden durch die oberflächliche Beschädigung der äußeren Laminatschicht 34 zur Darstellung der planen Anbindungsflächen 38 im Fräsvorgang nur die Glasfa- sern der äußeren Laminatschicht 34 jedoch nicht die Kohlefasern der inneren Laminatschicht 32 freigesetzt. Daher bleiben die strukturellen Eigenschaften des Kohlefasermatrixverbunds der inneren Laminatschicht 32 in vorteilhafter Weise erhalten. Außerdem werden korrosive Wechselwirkungen zu metalli schen Bauteilen im Anbindungsbereich der Karosseriestruktur des Fahrzeugs in vorteilhafter Weise vermieden. BEZUGSZEICHENLISTE In addition, the planar attachment surfaces 38 are formed in the region of the planar inner surfaces 26. Furthermore, the radially inner laminate layer 32 remains undamaged when the planar connection surfaces 38 are formed. Thus, only the glass fibers of the outer laminate layer 34 but not the carbon fibers of the inner laminate layer 32 are released by the surface damage of the outer laminate layer 34 to depict the planar bonding surfaces 38 in the milling process. Therefore, the structural properties of the carbon fiber matrix composite of the inner laminate layer 32 are advantageously maintained. In addition, corrosive interactions are avoided to Metalli's components in the connection area of the body structure of the vehicle in an advantageous manner. LIST OF REFERENCE NUMBERS
10 Druckbehälter 10 pressure vessels
1 1 Innenbehälter  1 1 inner container
12 Außenhülle 12 outer shell
14 Mittelbereich  14 mid-range
16, 18 Endbereich  16, 18 end area
20 Fortsatz 20 extension
22 Innenkontur 22 inner contour
24 Außenkontur 24 outer contour
26 plane Innenfläche  26 plane inner surface
28 runde Innenfläche 28 round inner surface
30 Mantelstruktur 30 sheath structure
32 innere Laminatschicht 32 inner laminate layer
34 äußere Laminatschicht 34 outer laminate layer
36 Befestigungselement  36 fastener
36A Lasche  36A tab
38 Anbindungsfläche  38 connection area
io io

Claims

PATENTANSPRÜCHE:  CLAIMS:
Druckbehälter (10) mit einer Außenhülle (12), welche einen zylinderähn- lichen Mittelbereich (14) und zwei sich daran anschließende Endbereiche (16, 18) aufweist, wobei an beiden axialen Enden des zylinderähnlichen Mittelbereichs (14) der Außenhülle (12) jeweils ein hohlzylindrischer Fort- satz (20) ausgebildet ist, welcher über den jeweiligen Endbereich (16, 18) übersteht, A pressure vessel (10) having an outer shell (12) which has a cylinder-like central region (14) and two adjoining end regions (16, 18), wherein at both axial ends of the cylinder-like central region (14) of the outer shell (12) respectively a hollow cylindrical extension (20) is formed which projects beyond the respective end region (16, 18),
dadurch gekennzeichnet, characterized,
dass derjeweilige hohlzylindrische Fortsatz (20) an seinem offenen Ende in mehrere Befestigungselemente (36) übergeht, welche jeweils eine ra- dial außen angeordnete plane Anbindungsfläche (38) aufweisen . that the respective hollow-cylindrical extension (20) merges at its open end into a plurality of fastening elements (36), each of which has a radially outer plane connection surface (38).
Druckbehälter (10) nach Anspruch 1 , Pressure vessel (10) according to claim 1,
dadurch gekennzeichnet, dass characterized in that
die Befestigungselemente (36) als Laschen (36A) ausgeführt sind. the fasteners (36) are designed as tabs (36A).
Druckbehälter (10) nach Anspruch 1 oder 2, Pressure vessel (10) according to claim 1 or 2,
dadurch gekennzeichnet, dass characterized in that
die Befestigungselemente (36) durch eine spanabhebende erste Nach- bearbeitung in den korrespondierenden hohlzylindrischen Fortsatz (20) eingebracht sind, wobei die planen Anbindungsflächen (38) durch eine spanabhebende zweite Nachbearbeitung in die Befestigungselemente (36) eingebracht sind. the fastening elements (36) are introduced into the corresponding hollow-cylindrical extension (20) by a first machining operation, wherein the planar connection surfaces (38) are introduced into the fastening elements (36) by a second machining operation.
Druckbehälter (10) nach einem der Ansprüche 1 bis 3, Pressure vessel (10) according to one of claims 1 to 3,
dadurch gekennzeichnet, dass characterized in that
zumindest der hohlzylindrische Fortsatz (20) der Außenhülle (12) eine runde Außenkontur (24) und eine vieleckige Innenkontur (22) mit planen Innenflächen (26) und/oder runden Innenflächen (28) aufweist. at least the hollow cylindrical extension (20) of the outer shell (12) has a round outer contour (24) and a polygonal inner contour (22) with flat inner surfaces (26) and / or round inner surfaces (28).
Druckbehälter (10) nach Anspruch 4, Pressure vessel (10) according to claim 4,
dadurch gekennzeichnet, dass die planen Anbindungsflächen (38) im Bereich der planen Innenflächen (26) ausgebildet sind. characterized in that the planar connection surfaces (38) are formed in the region of the plane inner surfaces (26).
6. Druckbehälter (10) nach einem der Ansprüche 1 bis 5, 6. Pressure vessel (10) according to one of claims 1 to 5,
dadurch gekennzeichnet, dass  characterized in that
die Außenhülle (12) aus einem faserverstärkten, vorzugsweise einem endlosfaserverstärkten Kunststoff (CFK, GFK) gefertigt ist.  the outer shell (12) is made of a fiber-reinforced, preferably an endless fiber-reinforced plastic (CFRP, GFRP).
7. Druckbehälter (10) nach einem der Ansprüche 1 bis 6, 7. Pressure vessel (10) according to one of claims 1 to 6,
dadurch gekennzeichnet, dass  characterized in that
die Außenhülle (12) zumindest im Bereich der Befestigungselemente (36) eine Mantelstruktur (30) mit einer radial inneren Laminatschicht (32) und einer radial äußeren Laminatschicht (34) aufweist.  the outer shell (12) has a sheath structure (30) with a radially inner laminate layer (32) and a radially outer laminate layer (34) at least in the region of the fastening elements (36).
8. Druckbehälter (10) nach Anspruch 7, 8. pressure vessel (10) according to claim 7,
dadurch gekennzeichnet, dass  characterized in that
die Laminatschichten (32, 34) verschiedene Fasermaterialien aufweisen, wobei die radial innere Laminatschicht (32) beim Ausformen der planen Anschlussflächen (38) unbeschädigt bleibt.  the laminate layers (32, 34) have different fiber materials, wherein the radially inner laminate layer (32) remains undamaged when forming the planar connection surfaces (38).
9. Druckbehälter (10) nach einem der Ansprüche 6 bis 8, 9. pressure vessel (10) according to any one of claims 6 to 8,
dadurch gekennzeichnet, dass  characterized in that
der Faserverbundkunststoff ein kohlefaserverstärkter, vorzugsweise ein endloskohlefaserverstärkter Kunststoff (CFK) oder ein glasfaserverstärk- ter, vorzugsweise ein endlosglasfaserverstärkter Kunststoff (GFK) ist.  the fiber composite plastic is a carbon fiber reinforced, preferably a continuous carbon fiber reinforced plastic (CFRP) or a glass fiber reinforced ter, preferably an endless glass fiber reinforced plastic (GRP).
10. Druckbehälter (10) nach einem der Ansprüche 1 bis 9, 10. Pressure vessel (10) according to one of claims 1 to 9,
dadurch gekennzeichnet, dass  characterized in that
die Außenhülle (12) einen fluiddichten Innenbehälter (11 ) aus Metall oder aus faserverstärktem Kunststoff (CFK, GFK) oder aus unverstärktem Kunststoff flächig umschließt oder den fluiddichten Innenbehälter (11 ) selbst ausbildet. the outer shell (12) encloses a fluid-tight inner container (11) made of metal or fiber-reinforced plastic (CFRP, GFRP) or unreinforced plastic or forms the fluid-tight inner container (11) itself.
11. Verfahren zur Herstellung einer Außenhülle (12) für einen Druckbehälter (10), welcher nach zumindest einem der Ansprüche 1 bis 10 ausgebildet ist, mit den Schritten: 11. A method for producing an outer shell (12) for a pressure vessel (10), which is designed according to at least one of claims 1 to 10, with the steps:
Umwickeln eines Innenbehälters (11 ) und/oder eines jeweiligen sich axial an diesen anschließenden Wickeldorns mit einem Endlosfasermaterial, so dass an beiden axialen Enden des zylinderähnlichen Mittel bereichs (14) der Außenhülle (12) jeweils ein hohlzylindrischer Fortsatz (20) aus- gebildet ist, welcher über den jeweiligen Endbereich (16, 18) übersteht, Aushärten der Außenhülle (12), und  Wrapping of an inner container (11) and / or a respective axially adjacent thereto winding mandrel with an endless fiber material, so that at both axial ends of the cylinder-like central portion (14) of the outer shell (12) each have a hollow cylindrical extension (20) is formed , which protrudes beyond the respective end region (16, 18), hardening of the outer shell (12), and
mechanisches Bearbeiten des jeweiligen Fortsatzes (20) derart, dass da- raus die Befestigungselemente (36) mit den jeweiligen planen An- schlussflächen (38) ausgeformt werden.  mechanical processing of the respective extension (20) in such a way that out of this, the fastening elements (36) are formed with the respective planar connection surfaces (38).
12. Verfahren nach Anspruch 11 , 12. The method according to claim 11,
dadurch gekennzeichnet, dass  characterized in that
das gewickelte Endlosfasermaterial vor dem Aushärten mit einem Mat- rixmaterial versehen wird.  the wound continuous fiber material is provided with a matrix material before curing.
13. Verfahren nach Anspruch 11 , 13. The method according to claim 11,
dadurch gekennzeichnet, dass  characterized in that
die Endlosfasern bereits mit einem Matrixsystem vorimprägniert werden.  the continuous fibers are already preimpregnated with a matrix system.
14. Verfahren nach einem der Ansprüche 11 bis 13, 14. The method according to any one of claims 11 to 13,
dadurch gekennzeichnet, dass  characterized in that
der jeweilige Wickeldorn zumindest im Bereich der auszubildenden Be- festigungselemente (36) einen polygonalen und auf die auszubildenden planen Anschlussflächen (38) angepassten polygonalen Querschnitt auf- weist.  the respective winding mandrel has, at least in the region of the fastening elements (36) to be formed, a polygonal cross-section which is adapted to the flat connecting surfaces (38) to be formed.
EP19711890.4A 2018-03-28 2019-03-15 Pressurised container and method for producing an outer casing for a pressurised container Active EP3601870B1 (en)

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WO2022079076A1 (en) * 2020-10-13 2022-04-21 Faurecia Systemes D'echappement Protection device for a high-pressure hydrogen tank

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