JP2017096371A - Pressure container - Google Patents

Pressure container Download PDF

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JP2017096371A
JP2017096371A JP2015227841A JP2015227841A JP2017096371A JP 2017096371 A JP2017096371 A JP 2017096371A JP 2015227841 A JP2015227841 A JP 2015227841A JP 2015227841 A JP2015227841 A JP 2015227841A JP 2017096371 A JP2017096371 A JP 2017096371A
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liner
core material
pressure vessel
reinforced resin
fiber reinforced
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JP6659320B2 (en
Inventor
吉宏 岩野
Yoshihiro Iwano
吉宏 岩野
石橋　一伸
Kazunobu Ishibashi
一伸 石橋
稲生　隆嗣
Takashi Inao
隆嗣 稲生
龍仁 神藤
Tatsunori Shindo
龍仁 神藤
潔 鵜澤
Kiyoshi Uzawa
潔 鵜澤
影山　裕史
Yasushi Kageyama
裕史 影山
真実 坂口
Mami SAKAGUCHI
真実 坂口
真人 金崎
Masato Kanezaki
真人 金崎
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Kanazawa Institute of Technology (KIT)
Toyota Motor Corp
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Kanazawa Institute of Technology (KIT)
Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

PROBLEM TO BE SOLVED: To provide a pressure container capable of enhancing strength of an end part of a pressure container in which pressure acts on a direction along an axial center of the pressure container.SOLUTION: A pressure container 1 is configured such that on a peripheral surface of a core material 2 including a cylindrical liner 3 formed with an internal space S and a mouthpiece 4 integrated with the liner 3 on at least one end part of the liner 3, a sheet-like fiber-reinforced resin layer 5 is formed so as to circle a plurality of times over both ends of the core material 2. On a cross section vertical to an axial center CL of the pressure container 1, the shape of the core material 2 changes so that a cross sectional area of the core material 2 containing the mouthpiece 4 gradually decreases toward an end part 11 of the pressure container 1 on which the mouthpiece 4 is arranged.SELECTED DRAWING: Figure 2

Description

本発明は、高圧のガス等を貯蔵するに好適な圧力容器に関する。   The present invention relates to a pressure vessel suitable for storing high-pressure gas or the like.

たとえば、天然ガス自動車または燃料電池自動車などには、燃料ガスを貯蔵する圧力容器が利用されている。この種の圧力容器は、軽量化および高強度化を図るべく、圧力容器の形状に応じたライナーに口金が接着剤などで取付けられた状態で芯材とし、この芯材に繊維強化樹脂層が被覆されている。   For example, a pressure vessel for storing fuel gas is used in a natural gas vehicle or a fuel cell vehicle. In order to reduce the weight and increase the strength, this type of pressure vessel is used as a core material with a base attached to the liner corresponding to the shape of the pressure vessel with an adhesive or the like, and a fiber reinforced resin layer is provided on the core material. It is covered.

このような圧力容器として、たとえば、特許文献１には、フィラメントワインディング法により圧力容器を製造する方法が提案されている。ここでは、芯材を被覆する繊維強化樹脂材として、フィラメント状の強化繊維に熱硬化性樹脂を含浸した幅狭い繊維強化樹脂が用いられている。そして、この方法では、圧力容器の胴体部の少なくとも一部を構成するライナーに、幅狭い繊維強化樹脂が、オーバラップするように巻き付けられる。   As such a pressure vessel, for example, Patent Document 1 proposes a method of manufacturing a pressure vessel by a filament winding method. Here, a narrow fiber reinforced resin obtained by impregnating a filamentous reinforcing fiber with a thermosetting resin is used as a fiber reinforced resin material covering the core material. In this method, the narrow fiber reinforced resin is wound around the liner that forms at least a part of the body portion of the pressure vessel so as to overlap.

特開２０１０−１２５８２６号公報JP 2010-125826 A

しかしながら、特許文献１に示すフィラメントワインディング法によれば、幅の狭い繊維強化樹脂をオーバラップするように、これを芯材に巻き付けるため、巻き付け時間が多大な時間となる。   However, according to the filament winding method shown in Patent Document 1, a narrow fiber-reinforced resin is wound around a core material so as to overlap, so that the winding time becomes a long time.

そこで、１枚の繊維強化樹脂シートを、芯材に複数回巻き付けた場合には、短時間で、繊維強化樹脂層を形成することができる。しかしながら、このような方法で製造された圧力容器は、軸心に沿った方向に圧力が作用する圧力容器の端部を補強することは難しい。したがって、圧力容器の端部を補強するには、芯材に繊維強化樹脂シートを巻き付けた後、別途、フィラメントワインディング法で補強する必要があり、手間がかかる。   Therefore, when one fiber-reinforced resin sheet is wound around the core material a plurality of times, the fiber-reinforced resin layer can be formed in a short time. However, it is difficult for the pressure vessel manufactured by such a method to reinforce the end of the pressure vessel in which pressure acts in a direction along the axis. Therefore, in order to reinforce the end portion of the pressure vessel, it is necessary to separately reinforce by the filament winding method after winding the fiber reinforced resin sheet around the core material, which takes time.

本発明は、このような点を鑑みてなされたものであり、その目的とするところは、シート状の繊維強化樹脂が芯材の軸心周りに複数回周回するように、芯材の周面に繊維強化樹脂層を形成したとしても、圧力容器の軸心に沿った方向に圧力が作用する圧力容器の端部の強度を高めることができる圧力容器を提供することにある。   The present invention has been made in view of these points, and the object of the present invention is to provide a peripheral surface of the core material so that the sheet-like fiber reinforced resin circulates around the axis of the core material a plurality of times. An object of the present invention is to provide a pressure vessel capable of increasing the strength of the end portion of the pressure vessel in which pressure acts in a direction along the axis of the pressure vessel even if a fiber reinforced resin layer is formed on the pressure vessel.

前記課題を鑑みて、本発明に係る圧力容器は、内部空間が形成された筒状のライナーと、該ライナーの少なくとも一方の端部において前記ライナーと一体化された口金と、を備えた芯材の周面に、該芯材の両側に亘って複数回周回するように、シート状の繊維強化樹脂層が形成された圧力容器であって、前記圧力容器の軸心と垂直な断面において、前記口金を含む芯材の断面積が、前記口金が配置された前記圧力容器の端部に進むに従って連続的に減少するように、前記芯材の形状が変化している。   In view of the above problems, a pressure vessel according to the present invention includes a cylindrical liner having an internal space, and a base integrated with the liner at at least one end of the liner. A pressure vessel in which a sheet-like fiber reinforced resin layer is formed so as to circulate a plurality of times over both sides of the core material, in a cross section perpendicular to the axis of the pressure vessel, The shape of the core material is changed so that the cross-sectional area of the core material including the base continuously decreases as the cross-sectional area proceeds to the end of the pressure vessel where the base is disposed.

本発明によれば、圧力容器には、シート状の繊維強化樹脂層が芯材を複数回周回するように形成されているので、このような圧力容器は、短時間で簡単に製造し易い。さらに、繊維強化樹脂層が形成された部分の芯材の断面積が、口金が配置された端部に進むに従って、連続的に減少するように、芯材の形状が変化しているため、軸心に沿った方向に圧力が作用したとしても、ライナーから口金が抜け出すことはない。したがって、圧力容器の端部の周辺部分を、フィラメントワインディング法でさらに補強する必要がない。   According to the present invention, since the sheet-like fiber reinforced resin layer is formed in the pressure vessel so as to circulate the core material a plurality of times, such a pressure vessel is easily manufactured in a short time. Furthermore, since the shape of the core material is changed so that the cross-sectional area of the core material in the part where the fiber reinforced resin layer is formed proceeds continuously to the end where the base is arranged, the shaft material changes. Even if pressure acts in the direction along the heart, the base does not come out of the liner. Therefore, it is not necessary to further reinforce the peripheral portion of the end portion of the pressure vessel by the filament winding method.

本発明の実施形態に係る圧力容器の模式的断面図である。It is a typical sectional view of a pressure vessel concerning an embodiment of the present invention. 図１に示す圧力容器の軸心に沿ったＡ−Ａ矢視断面図である。It is AA arrow sectional drawing along the axial center of the pressure vessel shown in FIG. （ａ）は、図２に示す圧力容器のＢ−Ｂ矢視断面図であり、（ｂ）は、図２に示す圧力容器のＣ−Ｃ矢視断面図であり、（ｃ）は、図２に示す圧力容器のＤ−Ｄ矢視断面図である。(A) is BB arrow sectional drawing of the pressure vessel shown in FIG. 2, (b) is CC arrow sectional drawing of the pressure vessel shown in FIG. 2, (c) is a figure. It is DD sectional view taken on the line of the pressure vessel shown in FIG.

以下に、本発明の実施形態に係る圧力容器（タンク）１を、以下の図１〜図３を参照しながら説明する。   Below, the pressure vessel (tank) 1 which concerns on embodiment of this invention is demonstrated, referring the following FIGS. 1-3.

図１および図２に示すように、本実施形態に係る圧力容器１では、芯材２の両側に亘って芯材２を複数回周回するように、芯材２の周面にシート状の繊維強化樹脂層５が形成されている。芯材２は、筒状のライナー３と、ライナー３に一体化された一対の口金４，４とを備えている。   As shown in FIG. 1 and FIG. 2, in the pressure vessel 1 according to the present embodiment, a sheet-like fiber is formed on the peripheral surface of the core material 2 so as to circulate the core material 2 a plurality of times over both sides of the core material 2. A reinforced resin layer 5 is formed. The core material 2 includes a cylindrical liner 3 and a pair of caps 4 and 4 integrated with the liner 3.

ライナー３には、例えば７０ＭＰａ程度の高圧水素ガスを収容（充填）する内部空間Ｓが形成されている。ライナー３の材質は、その周面に沿って繊維強化樹脂シートを巻き付けることができるものであれば、金属、樹脂等、その材質は特に限定されるものではない。   The liner 3 is formed with an internal space S that accommodates (fills) high-pressure hydrogen gas of, for example, about 70 MPa. The material of the liner 3 is not particularly limited as long as the fiber reinforced resin sheet can be wound around the peripheral surface thereof, such as metal or resin.

口金４は、アルミニウムまたはステンレスの金属製の口金である。本実施形態では、口金４は、楕円状に扁平し、圧力容器１の端部に向かって先すぼみの形状である。一対の口金４，４は、ライナー３の両側において、ライナー３の内壁３２に嵌合している。   The base 4 is a metal base made of aluminum or stainless steel. In the present embodiment, the base 4 is flattened in an elliptical shape and has a shape of a dent toward the end of the pressure vessel 1. The pair of caps 4 and 4 are fitted to the inner wall 32 of the liner 3 on both sides of the liner 3.

これにより、圧力容器１の使用時には、口金４とライナー３は一体化し、一方の口金４に形成されたガス供給口４１から、内部空間Ｓ内に高圧水素ガスを供給することができる。   Thus, when the pressure vessel 1 is used, the base 4 and the liner 3 are integrated, and high-pressure hydrogen gas can be supplied into the internal space S from the gas supply port 41 formed in one base 4.

このような一体化は、例えば、ライナー３に相当する円筒パイプを準備し、円筒パイプの両側に口金４を挿入後、円筒パイプの両側を、端面が扁平するように変形させることで達成することができる。   Such integration is achieved, for example, by preparing a cylindrical pipe corresponding to the liner 3, inserting the caps 4 on both sides of the cylindrical pipe, and then deforming both sides of the cylindrical pipe so that the end faces are flattened. Can do.

これにより、ライナー３の軸心ＣＬ周りのすべての周長を、同じ長さにすることができる。したがって、後述する圧力容器１の製造時において、ライナー３の軸心ＣＬに直交するいずれの断面においても、繊維強化樹脂層５となるシート状の繊維強化樹脂を同じ長さ分、ライナー３（芯材２）に巻き付けることが容易にできる。   Thereby, all the circumferences around the axial center CL of the liner 3 can be made the same length. Therefore, at the time of manufacturing the pressure vessel 1 which will be described later, the sheet-like fiber reinforced resin to be the fiber reinforced resin layer 5 is the same length as the liner 3 (core) in any cross section orthogonal to the axis CL of the liner 3. It can be easily wound around the material 2).

繊維強化樹脂層５は、ライナー３の両側に亘って、芯材２を複数回周回するように、芯材２の周面に連続して形成されたシート状の層である。本実施形態では、上述したように、ライナー３の軸心ＣＬに直交するいずれの断面においても、ライナー３を周回するシート状の繊維強化樹脂層５の巻き付け長さ（周回した長さ）は、同じである。したがって、図３（ａ）〜（ｃ）に示す繊維強化樹脂層５の巻き付け長さは同じである。   The fiber reinforced resin layer 5 is a sheet-like layer continuously formed on the peripheral surface of the core material 2 so as to circulate the core material 2 a plurality of times over both sides of the liner 3. In the present embodiment, as described above, in any cross section orthogonal to the axis CL of the liner 3, the winding length of the sheet-like fiber reinforced resin layer 5 that circulates the liner 3 (circulated length) is The same. Therefore, the winding length of the fiber reinforced resin layer 5 shown to Fig.3 (a)-(c) is the same.

繊維強化樹脂層５は、強化繊維にマトリクス樹脂が含浸された層である。強化繊維は、芯材２の周方向に沿って引き揃えられた連続強化繊維であり、強化繊維は、圧力容器１の軸心ＣＬと直交する方向に配向している。   The fiber reinforced resin layer 5 is a layer in which a reinforced fiber is impregnated with a matrix resin. The reinforcing fibers are continuous reinforcing fibers that are aligned along the circumferential direction of the core material 2, and the reinforcing fibers are oriented in a direction orthogonal to the axis CL of the pressure vessel 1.

さらに、本実施形態では、圧力容器１の軸心ＣＬと垂直な断面において、口金４を含む芯材２の断面積が、圧力容器１の端部１１に進むに従って連続的に減少するように、芯材２の形状が変化している。   Furthermore, in the present embodiment, in a cross section perpendicular to the axis CL of the pressure vessel 1, the cross-sectional area of the core material 2 including the base 4 continuously decreases as it proceeds to the end portion 11 of the pressure vessel 1. The shape of the core material 2 has changed.

これにより、口金４を含む芯材２にも繊維強化樹脂層５が形成されているので、軸心ＣＬに沿った方向に圧力が作用したとしても、ライナー３から口金４が抜け出すことはない。したがって、圧力容器１の端部の周辺部分を、フィラメントワインディング法でさらに補強する必要がない。また、耐圧性を考慮して口金４を厚肉化する必要がないので、圧力容器１の軽量化を図ることができる。   Thereby, since the fiber reinforced resin layer 5 is also formed on the core material 2 including the base 4, the base 4 does not come out of the liner 3 even if pressure is applied in the direction along the axis CL. Therefore, it is not necessary to further reinforce the peripheral portion of the end portion of the pressure vessel 1 by the filament winding method. In addition, since it is not necessary to increase the thickness of the base 4 in consideration of pressure resistance, the pressure vessel 1 can be reduced in weight.

このような圧力容器１は、例えば以下に示すようにして製造することができる。ライナー３に相当する円筒パイプを準備し、円筒パイプの両側に口金４を挿入後、円筒パイプの両側を、端面が扁平するように変形させる。これにより、口金４をライナー３に一体化する。   Such a pressure vessel 1 can be manufactured as follows, for example. A cylindrical pipe corresponding to the liner 3 is prepared, and after the bases 4 are inserted on both sides of the cylindrical pipe, both sides of the cylindrical pipe are deformed so that the end surfaces are flattened. Thereby, the base 4 is integrated with the liner 3.

次に、口金４が一体化した芯材２（具体的にはライナー３）の両端に亘って、強化繊維にマトリクス樹脂が含浸された繊維強化樹脂シートをライナー３に複数回巻き付ける。本実施形態では、巻き付け時に、繊維強化樹脂シートに張力を作用させることにより、ライナー３の軸心ＣＬと交差するいずれの断面においても、繊維強化樹脂層５となる繊維強化樹脂シートを同じ長さ分、繊維強化樹脂シートをライナー３（芯材２）に巻き付けることが容易にできる。これにより、口金４が配置されたライナー３の部分にも、ライナー３の中央と同等の繊維強化樹脂層５が形成される。   Next, a fiber reinforced resin sheet in which a reinforcing resin is impregnated with a matrix resin is wound around the liner 3 a plurality of times over both ends of the core material 2 (specifically, the liner 3) with which the base 4 is integrated. In this embodiment, at the time of winding, by applying tension to the fiber reinforced resin sheet, the fiber reinforced resin sheet to be the fiber reinforced resin layer 5 has the same length in any cross section intersecting the axis CL of the liner 3. Therefore, the fiber reinforced resin sheet can be easily wound around the liner 3 (core material 2). Thereby, the fiber reinforced resin layer 5 equivalent to the center of the liner 3 is also formed in the portion of the liner 3 where the base 4 is disposed.

ここで、マトリクス樹脂が熱可塑性樹脂である場合には、繊維強化樹脂シートを加熱し、熱可塑性樹脂を軟化させた状態で、ライナー３に巻き付け、その後、放冷等により、熱可塑性樹脂を固化させる。一方、マトリクス樹脂が熱硬化性樹脂である場合には、未硬化の熱硬化性樹脂が含浸された繊維強化樹脂シートを巻き付けた後、熱硬化性樹脂を加熱により硬化させる。   Here, when the matrix resin is a thermoplastic resin, the fiber reinforced resin sheet is heated and wound around the liner 3 in a state where the thermoplastic resin is softened, and then the thermoplastic resin is solidified by cooling or the like. Let On the other hand, when the matrix resin is a thermosetting resin, after winding the fiber reinforced resin sheet impregnated with the uncured thermosetting resin, the thermosetting resin is cured by heating.

このようにして、繊維強化樹脂シートをライナー３に巻き付けることにより（すなわちシートワインディング法により）、圧力容器１を短時間で製造することができる。さらに、本実施形態では、口金４をライナー３に一体化した芯材２に、繊維強化樹脂シートを巻き付けるので、口金を後加工により接着剤等で取付ける必要がない。したがって、耐圧性を高めるべく、口金４とライナー３との接着代を増やす必要がないので、圧力容器１の小型化を図ることができる。   Thus, the pressure vessel 1 can be manufactured in a short time by winding the fiber reinforced resin sheet around the liner 3 (that is, by the sheet winding method). Furthermore, in this embodiment, since the fiber reinforced resin sheet is wound around the core material 2 in which the base 4 is integrated with the liner 3, it is not necessary to attach the base with an adhesive or the like by post-processing. Therefore, since it is not necessary to increase the bonding allowance between the base 4 and the liner 3 in order to increase the pressure resistance, the pressure vessel 1 can be reduced in size.

以上、本発明の実施の形態を詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更があっても、それらは本発明に含まれるものである。   Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and even if there is a design change within a scope not departing from the gist of the present invention, they are not limited to this embodiment. It is included in the invention.

例えば、本実施形態では、製造方法において、口金とライナーとを予め一体化したが、例えば、円筒パイプに予め繊維強化樹脂シートを巻き付けて繊維強化樹脂層を形成後、これに口金を挿入して、繊維強化樹脂層が形成された円筒パイプの両側を押し潰すように変形させてもよい。   For example, in the present embodiment, in the manufacturing method, the base and the liner are integrated in advance. For example, after a fiber reinforced resin sheet is wound around a cylindrical pipe in advance to form a fiber reinforced resin layer, the base is inserted into this. Alternatively, the cylindrical pipe on which the fiber reinforced resin layer is formed may be deformed so as to crush both sides.

１：圧力容器（タンク）、２：芯材、３：ライナー、４：口金、ＣＬ：軸心、Ｓ：内部空間。 1: pressure vessel (tank), 2: core material, 3: liner, 4: base, CL: axial center, S: internal space.

Claims (1)

内部空間が形成された筒状のライナーと、該ライナーの少なくとも一方の端部において前記ライナーと一体化された口金と、を備えた芯材の周面に、該芯材の両側に亘って複数回周回するように、シート状の繊維強化樹脂層が形成された圧力容器であって、
前記圧力容器の軸心と垂直な断面において、前記口金を含む芯材の断面積が、前記口金が配置された前記圧力容器の端部に進むに従って連続的に減少するように、前記芯材の形状が変化していることを特徴とする圧力容器。 On the peripheral surface of a core material provided with a cylindrical liner in which an internal space is formed and a base integrated with the liner at at least one end of the liner, a plurality of the core material is provided on both sides of the core material. A pressure vessel in which a sheet-like fiber reinforced resin layer is formed so as to circulate,
In the cross section perpendicular to the axial center of the pressure vessel, the cross-sectional area of the core material including the base is continuously reduced as it advances toward the end of the pressure vessel where the base is disposed. A pressure vessel characterized by a change in shape.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11719386B2 (en) 2020-10-13 2023-08-08 Rolls-Royce Plc Organic composite gas storage tank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11719386B2 (en) 2020-10-13 2023-08-08 Rolls-Royce Plc Organic composite gas storage tank

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