双层高压储氢瓶概念设计与增容分析  

Conceptual Design and Capacity Enhancement Analysis of Double Layer High Pressure Hydrogen Storage Bottles

作　　者：于芳芳 曾霞光 YU Fangfang;ZENG Xiaguang(College of Intelligent Manufacturing,Foshan Polytechnic,Foshan 528199,China;School of Mechatronic Engineering and Automation,Foshan University,Foshan 528199,China)

机构地区：[1]佛山职业技术学院智能制造学院,广东佛山528199 [2]佛山科学技术学院机械与自动化学院,广东佛山528199

出　　处：《汽车实用技术》2023年第19期98-103,共6页Automobile Applied Technology

摘　　要：由冯米塞斯屈服准则可知静水压力通常对材料屈服强度无影响,文章对一般高压瓶进行保持内外压差的增压加载过程模拟,得到等压差总是导致相同应力场的强度的结论。针对高压储氢瓶既能保持材料强度又能提高内压和容量的目标,利用该结论进行双层高压储氢瓶的概念设计。文中设计的双层瓶比常用储氢瓶增加了一层内瓶,瓶内形成两个压力分层,因此增加了一个可调控的内部压差。保持一定压差,调整内外层相对尺寸,分析双层瓶在相同屈服应力条件下的单位体积储氢量。结果表明,在相同屈服应力条件下的单位体积储氢量最大可比对应单层瓶提高约25%。文中设计和分析结果,对提高储氢瓶的储存能力具有较好参考价值。Inspired by the well-known fact that hydrostatic pressure usually has no influence on the yield strength of the material according to von mises yield criterion,the present paper simulates the pressuring processes maintaining the internal and external pressure difference for the common high-pressure bottles,and obtains the strength analysis conclusion that equal pressure difference always produces the same yield stress field.To maintain material strength and to improve internal pressure and storage capacity of the high-pressure hydrogen bottle,the double-layer high-pressure hydrogen storage bottle is conceptually designed according to this conclusion.The double-layer bottle has an additional inner bottle compared to the existing hydrogen storage bottle,forming two pressure layers inside the bottle,and thus adds an adjustable internal pressure difference.Maintaining a certain pressure difference,adjusting the relative size of the inner and outer layers,the hydrogen storage capacity per unit volume is analyzed under the same yield stress condition.It is found that the maximum storage capacity of the double-layer bottle can be increased by about 25%than the corresponding single-layer bottle.The present design and analysis results are a good reference to enhance the storage capacity of the hydrogen storage bottles.

关 键 词：双层高压储氢瓶 储氢能力 屈服强度 增容分析 

分 类 号：U463.99[机械工程—车辆工程]