JP7359167B2 - 高圧タンクおよび高圧タンクの製造方法 - Google Patents
高圧タンクおよび高圧タンクの製造方法 Download PDFInfo
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Description
以下では、高圧タンク1を、燃料電池車両に搭載される高圧の水素ガスが充填されるタンクとして説明するが、その他の用途についても適用することができる。また、高圧タンク1に充填可能なガスとしては、高圧の水素ガスに限定されず、CNG(圧縮天然ガス)等の各圧縮ガス、LNG(液化天然ガス)、LPG(液化石油ガス)等の各種液化ガス、その他のガスを挙げることができる。
次に、本発明の一実施形態に係る高圧タンク1の製造方法について説明する。図3は、高圧タンク1の製造方法の工程を説明するフロー図である。高圧タンク1の製造方法は、図3に示すように、部材形成工程S11と、第1樹脂層形成工程S12と、第1補強層形成工程S13と、第2補強層形成工程S14とを含んでいる。なお、部材形成工程S11と、第1樹脂層形成工程S12と、第1補強層形成工程S13とが、本発明でいう「接合体を準備する工程」に相当する。
図3に示すように、高圧タンク1の製造方法では、まず、部材形成工程S11を行う。この工程では、筒部材31の形成と、第2樹脂層22、23を被覆した一対のドーム部材32、33の形成とを行う。この工程を省略し、筒部材31と、第2樹脂層22、23を被覆した一対のドーム部材32、33とを別途準備してもよい。
筒部材31の形成方法では、図4に示すように、たとえば、円柱状のマンドレル100の外面に、繊維シートF1を巻き付けることによって、筒部材31を形成する。マンドレル100の外径D1は、筒部材31の内径に相当する外径であり、筒部材31の外側から各ドーム部材32(33)が筒部材31に嵌合することができる大きさに設定されることが好ましい。
第2樹脂層22、23を被覆した一対のドーム部材32、33の形成方法では、まず、図6に示す一対のドーム部材32、33を形成する。この形成方法では、図5に示すように、たとえばフィラメントワインディング法(FW法)により、マトリクス樹脂が含浸された繊維束F2をマンドレル200の外面に巻回する。具体的には、マンドレル200は、本体部201と、本体部201の一端から外側に延在するシャフト部202と、を有する。
次に、図3に示すように、第1樹脂層形成工程S12を行う。この工程では、図4および図8に示すように、準備した筒部材31の外周面31cを覆うように第1樹脂層21を形成する。ここで、第1樹脂層21は、第1補強層30に比べて、厚さ方向において、ガスの透過性が低い。また、第1樹脂層21は、第1補強層30および第2補強層34に対して、接着性を有することが好ましい。
次いで、図3に示すように、第1補強層形成工程S13を行う。この工程では、図9および図10に示すように、筒部材31の両端部31a、31aに、一対のドーム部材32、33を接合する。具体的には、筒部材31の各端部31aに、各ドーム部材32(33)の周端部32a(33a)を接合する。これにより、第1補強層30となる接合体30Aを形成することができる。
次に、図3に示すように、第2補強層形成工程S14を行う。この工程では、図10および図1に示すように、準備した接合体30Aに対して、一対のドーム部材32、33をわたすように、樹脂(マトリクス樹脂)を含浸した繊維束をヘリカル巻きで巻回することで、第2補強層34を形成する。
図11~図15を参照して本実施形態の変形例について説明する。以下では、相違点について主に説明し、上述した実施形態と同じ部材および部分に関しては、同じ符号を付してその詳細な説明は省略する。
Claims (4)
- 繊維強化樹脂からなる第1補強層と、前記第1補強層を覆うように形成され、繊維強化樹脂からなる第2補強層とを有し、ガスを収容する収容空間が形成された高圧タンクであって、
前記第1補強層は、筒部材の両端部に一対のドーム部材が接合された層であって、前記筒部材の内周面は、前記収容空間に露出しており、
前記第2補強層は、前記第1補強層の前記一対のドーム部材をわたすように、樹脂を含浸した繊維束がヘリカル巻きで巻回された層であり、
前記第1補強層と、前記第2補強層との間において、前記筒部材を覆うように、樹脂層が形成されており、
前記樹脂層は、前記第1補強層に比べて、厚さ方向において、前記ガスの透過性が低いことを特徴とする高圧タンク。 - 前記筒部材の外側から各ドーム部材が前記筒部材に嵌合しており、
前記筒部材と前記各ドーム部材とが嵌合した嵌合部において、前記筒部材と前記各ドーム部材との間に、前記樹脂層の一部が形成されていることを特徴とする請求項1に記載の高圧タンク。 - 繊維強化樹脂からなる第1補強層と、前記第1補強層を覆うように形成され、繊維強化樹脂からなる第2補強層とを有し、ガスを収容する収容空間が形成された高圧タンクの製造方法であって、
前記製造方法は、前記第1補強層となる接合体であり、筒部材の両端部に一対のドーム部材が接合した接合体を準備する工程と、
準備した前記接合体に対して、前記一対のドーム部材をわたすように、樹脂を含浸した繊維束をヘリカル巻きで巻回することで、前記第2補強層を形成する工程と、を含み、
前記準備する工程において、前記接合体として、前記筒部材の内周面が、前記収容空間に露出した接合体であって、前記筒部材を覆うように、樹脂層が形成された接合体を準備し、前記樹脂層は、前記第1補強層に比べて、厚さ方向において、前記ガスの透過性が低いことを特徴とする高圧タンクの製造方法。 - 前記準備する工程において、外周面に前記樹脂層が覆われた前記筒部材に対して、前記筒部材の外側から前記各ドーム部材を嵌合することにより、前記筒部材と前記ドーム部材とが嵌合した嵌合部において、前記筒部材と前記各ドーム部材との間に、前記樹脂層の一部を形成することを特徴とする請求項3に記載の高圧タンクの製造方法。
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