DE102018204803A1 - Pressure vessel and pressure vessel arrangement for a vehicle - Google Patents

Abstract

The invention relates to a pressure vessel (10) with an outer shell (12) made of fiber composite plastic (CFK, GFK) and a cylinder-like central region and two adjoining end portions, and a pressure vessel assembly (1) for a vehicle with such a pressure vessel (10). According to the invention, the pressure vessel (10) comprises at least one annular region (20) encircling the central region (14), which has a plurality of longitudinally extending and equidistantly circumferentially distributed elevations (22) suitable for corresponding recesses (32) of one arranged around the annular region (20) and adapted thereto form-fitting adapted thereto ring-like connection element (30) to enter into a frictional connection, which is suitable at least for the transmission of a torsional moment.

Description

The invention relates to a pressure vessel according to the preamble of claim 1. Furthermore, the invention relates to a pressure vessel arrangement for a vehicle with such a pressure vessel.

Pressure vessels and corresponding pressure vessel arrangements for vehicles 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.

A generic pressure vessel preferably has a cylindrical design, in which a cylindrical pressure vessel shell is closed on both sides by curved, outwardly curved bottoms. The pressure vessel wall may for example be constructed 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 container, the inner layer is a plastic liner made by blow molding or rotary / sintering method or thermoforming method. The plastic liner reinforcing middle layer is preferably wound in a wet winding process as a fiber winding on the plastic liner. By way of example, the fiber winding consists of, for example, carbon, aramid, glass and / or boron fibers which are embedded in a matrix of thermosets or of thermoplastics. The fibers are applied to the plastic liner in different fiber orientations. The preferred impact-absorbing outer layer may also be a fiber winding which is wound on 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 front-side 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 secured in position by means of clamping bands in conventional practice, which surround the smooth-surface cylinder wall of the high-pressure container.

From the DE 10 2011 051 436 A1 For example, a structural element for a vehicle is known, which has a pressure accumulator and two connecting elements for connecting the pressure accumulator with a supporting structure of the vehicle.

From the DE 10 2011 113 238 A1 is a body structure for a motor vehicle, in particular for a hybrid vehicle or an electric vehicle known. The body structure comprises a plurality of interconnected structural components, wherein at least one of the structural components is formed by a housing part for an energy storage device for storing a medium or electrical energy for driving the motor vehicle.

Object of the present invention is to provide a pressure vessel and a pressure vessel assembly for a vehicle with such a pressure vessel, which can be connected in a simple manner as a stiffening torsion-resistant to a vehicle structure.

This object is achieved by a pressure vessel having the features of patent claim 1 and by a pressure vessel arrangement for a vehicle having the features of patent claim 6. Advantageous embodiments with expedient developments of the invention are specified in the dependent claims.

In order to provide a pressure vessel and a pressure vessel arrangement for a vehicle, with such a pressure vessel, which can be connected in a simple manner torsionally rigid as a stiffening element to a vehicle structure, the pressure vessel comprises at least one circulating around a central region annular region which a plurality of longitudinally and equidistantly on Has circumferentially distributed surveys. The elevations are suitable for entering into a frictional connection with corresponding depressions of a ring-like connection element arranged around the ring area and adapted in a form-fitting manner thereto, which is suitable at least for transmitting a torsional moment.

The pressure vessel comprises an outer shell made of fiber composite plastic and a cylinder-like central region and two adjoining end regions. The pressure vessel arrangement comprises, in addition to the pressure vessel, a vehicle structure which has at least one ring-like attachment element. Here, the pressure vessel is connected by the at least one ring-like connection element in its at least one annular region torsionally fixed to the vehicle structure. The fiber composite plastic may preferably be a carbon fiber reinforced plastic (CFRP) or a glass fiber reinforced plastic (GRP)

In an advantageous embodiment of the pressure vessel, a container wall can be made in one or more layers. Thus, the outer shell can surround a fluid-tight inner container made of metal or fiber-reinforced plastic or unreinforced plastic surface or form the fluid-tight inner container itself. As a result, the pressure vessel may have massive container wall thicknesses and therefore provide a correspondingly high component stability or component rigidity and be installed as a stiffening element in the vehicle structure or vehicle body. Preferably, the pressure vessel is integrated into at least one load path and, in a load case, for example in a vehicle crash or during normal driving operation, absorb and forward operating forces and / or crash forces without damage. In this way, longitudinal or cross member of the vehicle structure can be relieved in terms of strength, whereby they can be designed with lower material thickness and / or with smaller dimensions.

In a further advantageous embodiment of the pressure vessel, the at least one annular area can be manufactured together with the outer shell made of fiber composite plastic. Thus, the circumferential annular region, for example, be formed as a material thickening on the outside on a cladding layer of the outer shell, wherein the cladding layer, the inner layer of the container wall substantially completely enveloped and has a substantially constant wall thickness. As a result, structure for transmitting a torsional moment alone in the outer shell of the container wall is formed and has no influence on the inner shell of the container wall. Thus, the transmission structure for torsional moments does not adversely affect the component stability of the pressure vessel, so that a reliable pressure storage is not affected.

In a further advantageous embodiment of the pressure vessel, the elevations can be introduced by a mechanical post-processing, in particular by a machining post-processing such as milling, in the at least one annular region.

In an advantageous embodiment of the pressure vessel arrangement, the at least one ring-like connecting element may have a plurality of recesses distributed equidistantly around the circumference with the same pitch as the elevations of the at least one annular area. As a result, the elevations of the at least one annular region can engage in the recesses of the at least one ring-like connecting element in the manner of a toothed wheel, so that the torsional moments can be transferred non-positively. The at least one ring-like connection element can for example be made in one piece or in several parts.

In a further advantageous embodiment of the pressure vessel arrangement, the vehicle structure may comprise two ring-like connection elements, which have a predetermined distance in the axial direction to each other and can each cooperate with an annular region of the pressure vessel. With regard to a perfect and damage-free introduction of force into the pressure vessel, the two annular regions can be spaced in the axial direction from the end-side end regions and instead only run in the cylinder-like central region of the container jacket.

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 in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention. Thus, embodiments are also included and disclosed by the invention, which are not explicitly shown or explained in the figures, however, emerge and can be produced by separated combinations of features from the embodiments explained.

• 1 eine schematische perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Druckbehälters; und
• 2 eine schematische Schnittdarstellung von Komponenten einer erfindungsgemäßen Druckbehälteranordnung für ein Fahrzeug mit dem erfindungsgemäßen Druckbehälter aus 1.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. In the drawing, like reference numerals designate components that perform the same or analog functions. Hereby show:

• 1 a schematic perspective view of an embodiment of a pressure vessel according to the invention; and
• 2 a schematic sectional view of components of a pressure vessel assembly according to the invention for a vehicle with the pressure vessel according to the invention from 1 ,

How out 1 and 2 it can be seen has the pressure vessel 10 in the illustrated embodiment, an outer shell 12 made of fiber composite plastic (CFRP, GFRP) and a cylinder-like middle area 14 and two adjoining end regions 16 . 18 on. According to the invention, the pressure vessel comprises 10 at least one around the middle area 14 circumferential ring area 20 which has a plurality of longitudinal and equidistantly distributed on the circumference elevations 22 having. The surveys 22 are suitable, with appropriate wells 32 one around the ring area 20 arranged and positively adapted thereto ring-like connection element 30 to enter into a non-positive connection, which is suitable at least for the transmission of a torsional moment.

How out 1 can be further seen, comprises the illustrated pressure vessel 10 two circumferential ring areas 20 , which with two corresponding ring-like attachment element 30 a vehicle structure 3 can interact. The two ring areas 20 point in the axial direction AR a predetermined distance from each other and to the two end regions 16 . 18 of the pressure vessel 10 on. The two end areas 16 . 18 are each designed as outwardly curved container bottoms.

How out 2 is further apparent, is a container wall of the pressure vessel 10 in the illustrated embodiment, two layers with an inner shell 11 and the outer shell 12 educated. How out 2 can be further seen, the outer shell 12 a cladding layer 24 with a substantially constant wall thickness, which the inner shell 11 essentially completely wrapped. Of course, the pressure vessel 10 also single-layered or with more than two layers. The two circumferential ring areas 20 are in the illustrated embodiment, each as a material thickening on the outside of the cladding layer 24 the outer shell 12 formed. In the illustrated embodiment, the ring areas 20 together with the outer shell 12 made of fiber composite plastic preferably made of carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GRP). The surveys 22 are by a machining, especially by milling, in the ring areas 20 brought in. That means that between two surveys 22 is removed by milling material.

The pressure vessel arrangement 1 for a vehicle includes the vehicle structure 3 , which in the illustrated embodiment, two ring-like connection elements 30 has, and the pressure vessel 10 with the two ring areas 20 , How out 2 can be further seen, have the ring-like connection elements 30 in each case a plurality of recesses distributed equidistantly around the circumference 32 with the same division as the surveys 22 the ring areas 20 of the pressure vessel. The depression 32 are in relation to a pressure vessel 10 facing outside 34 in the connection element 30 brought in. This allows the surveys 22 the ring areas 20 into the wells 32 the ring-like connection element 30 engage in the manner of a gear, so that the torsional moments can be transferred non-positively. In the illustrated embodiment, the ring-like connection element 30 executed in one piece. Alternatively, the ring-like attachment elements 30 be executed in several parts.

LIST OF REFERENCE NUMBERS

1

Pressure vessel assembly

3

vehicle structure

10

pressure vessel

11

interior Skin

12

outer shell

14

the central region

16, 18

end

20

ring area

22

survey

24

cladding layer

30

connecting element

32

deepening

34

outside

AR

axially

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011051436 A1 [0005]
• DE 102011113238 A1 [0006]

Claims (10)

Pressure vessel (10) with an outer shell (12) made of fiber composite plastic (CFK, GFK) and a cylinder-like central region (14) and two adjoining end portions (16, 18), characterized in that the pressure vessel (10) at least one around the central region (14) comprises circumferential annular region (20), which has a plurality of longitudinally extending and equidistantly distributed on the circumference elevations (22) which are suitable, with corresponding recesses (32) of a ring around the area (20) arranged and adapted thereto form-fitting ring-like connection element (30) enter into a non-positive connection, which is suitable at least for the transmission of a torsional moment. Pressure vessel (10) after Claim 1 , characterized in that a container wall is formed in one or more layers. Pressure vessel (10) after Claim 1 or 2 , characterized in that the at least one annular region (20) together with the outer shell (12) made of fiber composite plastic (CFK, GFK) is made. Pressure vessel (10) after Claim 3 , characterized in that the fiber composite plastic is a carbon fiber reinforced plastic (CFRP) or a glass fiber reinforced plastic (GRP). Pressure vessel (10) according to one of Claims 1 to 4 , characterized in that the elevations (22) are introduced by a mechanical post-processing in the at least one annular region (20). A pressure vessel arrangement (1) for a vehicle, having a vehicle structure (3) which has at least one ring-like attachment element (30), and a pressure vessel (10), characterized in that the pressure vessel (10) according to at least one of Claims 1 to 5 is executed, wherein the pressure vessel (10) by the at least one ring-like connection element (30) in its at least one annular region (20) torsionally fixed to the vehicle structure (3) is connected. Pressure vessel assembly (1) according to Claim 6 , characterized in that the at least one ring-like connecting element (30) has a plurality of equidistantly distributed on the circumference depressions (32) with the same pitch as the elevations (22) of the at least one annular portion (20). Pressure vessel assembly (1) according to Claim 6 or 7 , characterized in that the at least one ring-like connection element (30) is made in one piece. Pressure vessel assembly (1) according to Claim 6 or 7 , characterized in that the at least one ring-like connecting element (30) is designed in several parts. Pressure vessel arrangement (1) according to one of Claims 6 to 9 , characterized in that the vehicle structure (3) comprises two ring-like connecting elements (30) which have a predetermined distance in the axial direction (AR) to each other and each cooperate with an annular region (20) of the pressure vessel (10).

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