HIGH-PRESSURE HYDROGEN VESSEL

• Main Authors: ISHIKAWA NOBUYUKI, TAKAGI SHUSAKU, TAKANO TOSHIO, OKANO TAKUSHI, MATSUBARA KAZUKI
• Format: Patent
• Language: English; Japanese
• Published: 26.07.2023
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; STORING OF DISTRIBUTING GASES OR LIQUIDS; THERMAL INSULATION IN GENERAL; VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES; WEAPONS

To provide a high-pressure hydrogen vessel that suppresses breakage caused by scattering of hydrogen into a metallographic structure.SOLUTION: A high-pressure hydrogen vessel comprises a metal cylindrical body for storing high-pressure hydrogen, and a lid member for closing an end portion of the cylindrical body. The cylindrical body includes a junction for fixing the lid member to the end portion in a center axis direction of the cylindrical body, a cylindrical part to be an outer fence of a storage part for storing high-pressure hydrogen, and a seal surface arranged between the junction and the cylindrical part in the center axis direction and formed on the inner surface of the cylindrical body. The lid member includes a seal portion contacting the seal surface of the cylindrical body, and a fixed portion fixed to the junction of the cylindrical body. When a region of the seal surface with which the seal portion is brought into contact is a contact region, a wall thickness from the contact region to the external surface of the cylindrical body is wall thickness H, and in stress distribution generated in a cross section including a central axis of the cylindrical body in a usage state of filling the storage part with hydrogen, as a part of the cylindrical body from the junction to the contact region, including the junction, a point in which stress is centralized is a stress generating part, and a distance between the contact region and the stress generating part is distance L, the relation between the wall thickness H and the distance L satisfies at least relation of H<L.SELECTED DRAWING: Figure 2 【課題】金属組織内への水素の拡散を起因とする破損を抑制する高圧水素容器を提供する。【解決手段】本発明に係る高圧水素容器は、高圧水素の貯蔵用の金属製の筒体と、筒体の端部を塞ぐ蓋部材と、を備え、筒体は、当該筒体の中心軸方向において端部に蓋部材を固定するための接合部と、高圧水素を貯蔵する貯蔵部の外郭となる筒部と、中心軸方向において接合部と筒部との間に配置され、当該筒体の内面に形成されたシール面と、を備え、蓋部材は、筒体のシール面と当接するシール部と、筒体の接合部に固定される固定部と、を備え、シール面のうちシール部が当接している領域を当接領域とし、当接領域から筒体の外面までの肉厚を肉厚Ｈとし、接合部を含む接合部から当接領域までの筒体の一部分であって、貯蔵部に水素を充填した使用状態における筒体の中心軸を含む断面に発生する応力分布において、応力が集中する点を応力発生部とし、当接領域と応力発生部との距離を距離Ｌとしたときに、肉厚Ｈと距離Ｌとの関係は、少なくともＨ＜Ｌを満たす。【選択図】図２