Study on the diaphragm fracture in a diaphragm compressor for a hydrogen refueling station
Study on the diaphragm fracture in a diaphragm compressor for a hydrogen refueling station
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DOI：
10.1016/j.ijhydene.2016.02.106
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发表时间：
2016-04
影响因子：
7.2
通讯作者：
X. Jia;Jiahao Chen;Han Wu;X. Peng
中科院分区：
文献类型：
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作者：
X. Jia;Jiahao Chen;Han Wu;X. Peng
某隔膜压缩机在加氢站应用时，隔膜断裂多发生在多孔板外环槽的边缘和中部区域。柱塞泵工作不稳定，造成油缸内缺油，活塞到达下止点时，膜片会紧贴在孔板上。因此，在槽区的膜片将承受大挠度变形引起的径向应力和孔板槽引起的附加应力。本文提出了薄板大挠度理论和薄板小挠度理论相结合的理论计算方法，分析了两种径向应力。为了相互验证，本文还进行了实验和数值计算.进一步研究了槽圆角半径、槽宽和膜片厚度对膜片径向应力的影响。结果表明，大挠度变形引起的径向应力与小挠度变形引起的径向应力相似。膜片的最大径向应力随槽圆角半径的增大而缓慢增大。但随着隔板厚度的增加或凹槽宽度的减小，隔板的挠度和径向应力均明显减小。
When a diaphragm compressor applied in the hydrogen refueling stations, the diaphragm fracture occurred frequently in the edge and middle region of the outer circular groove of the perforated plate. The unstable operation of the plunger pump caused the oil shortage in the oil cylinder, so the diaphragm would cling to the perforated plate while the piston reached the bottom dead center. Thus, the diaphragm in the groove region would endure the radial stress caused by the large deflection deformation and the additional stress caused by the perforated plate's groove. In this paper, a theoretical calculation method combined with the thin-plate large deflection theory and the thin-plate small deflection theory was proposed to analyze the two kinds of the radial stresses. The experimental and numerical methods also were conducted for mutual verification. Furthermore, the influencing factors of the diaphragm radial stress were investigated, including the radius of the groove fillet, the groove width and the diaphragm thickness. The results indicated that the radial stress caused by the large deflection deformation is similar to that caused by the small deflection deformation. The maximum radial stress of the diaphragm increased slowly with the increase in the radius of the groove fillet. But with increasing the diaphragm thickness or decreasing the groove width, both the deflection and the radial stress of the diaphragm had an obviously decrease.