基于气阀双向流固耦合分析的故障机理研究  

Research on Failure Mechanism Based on Bidirectional FluidStructure Coupling Analysis of Reciprocating Compressor Valve

作　　者：吴迪 王维民 孟凡昌[2] 李启行 郭美那 WU Di;WANG Wei-min;MENG Fan-chang;LI Qi-hang;GUO Mei-na(Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinery,Beijing University of Chemical Technology;Offshore Oil Engineering Co.,Ltd.)

机构地区：[1]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室 [2]海洋石油工程股份有限公司

出　　处：《化工机械》2022年第6期929-937,1003,共10页Chemical Engineering & Machinery

摘　　要：采用双向流固耦合的方法,研究了气阀弹簧刚度对往复压缩机排气阀开启和关闭过程中阀片上载荷和阀片运动情况的影响。发现阀片上不同位置运动和载荷存在较大差异,弹簧刚度主要影响排气阀关闭过程。对弹簧失效状态下排气阀关闭过程进行了模拟,将模拟计算得到的气阀振动信号进行EMD分解并计算其样本熵,弹簧失效状态下各分量和样本熵变化趋势与以往的试验结果一致。Through fluid-structure coupling simulation,the spring stiffness'effect of reciprocating compressor's vent valve on the vent valve's load and motion during the opening and closing process was studied to show that,obvious differences exist in motion and load at different positions on the valve plate,and spring stiffness mainly influences closing process of the vent valve.The closing process of the vent valve under spring failure state was simulated,including having EMD decomposition performed on the simulated vibration signal and its sample entropy calculated to show that,the variation trend of the IMFs and sample entropy under the spring failure condition complies with previous experimental results.

关 键 词：往复压缩机 气阀 弹簧刚度 故障机理 流固耦合 

分 类 号：TQ051.21[化学工程]