石油石化绿色低碳

针对加氢站氢气隔膜压缩机进排气阀O型密封圈频繁泄漏问题，结合国内某加氢站实际失效案例展开系统分析。研究发现：持续高压缩比运行导致排气阀热负荷积累，引发O型圈热降解甚至熔融失效；低温环境则使进气阀O型圈弹性下降，无法有效补偿密封面不平度，形成局部泄漏通道。基于此，提出三项改进措施：优化运行策略以降低高压缩比工况占比；采用全氟醚橡胶（FFKM）与氢化丁腈橡胶（HNBR）等高性能材料提升耐温与抗低温性能；改进冷水机组温控系统，确保氢气入口温度稳定。实施后，密封圈更换周期显著延长，设备运行可靠性与经济性大幅提升，为同类压缩机密封失效防治提供了有效技术路径。

This paper systematically investigates the frequent leakage of O-ring seals in the inlet and exhaust valves of hydrogen diaphragm compressors at hydrogen refueling stations, based on an actual failure case from a domestic station. The study reveals that sustained high compression ratio operation leads to thermal load accumulation in the exhaust valve, causing thermal degradation or even melting failure of the O-rings. In low-temperature environments, the elasticity of the inlet valve O-rings decreases, preventing effective compensation for sealing surface irregularities and resulting in localized leakage channels. Based on these findings, three improvement measures are proposed: optimizing operational strategies to reduce the proportion of high compression ratio conditions; adopting highperformance materials such as perfluoroether rubber(FFKM) and hydrogenated nitrile rubber(HNBR) to enhance high-temperature resistance and low-temperature performance; and upgrading the temperature control system of the chiller unit to ensure stable hydrogen inlet temperature. After implementation, the replacement cycles of the seals are significantly extended, and the operational reliability and economic efficiency of the equipment are greatly improved, providing an effective technical pathway for preventing and addressing similar seal failures in compressors.