关键词: 新氢压缩机, 管道系统, 气流脉动, 管道振动, 模态分析, 减振措施

Abstract: The gas pulsation and piping vibration of piping system of the new hydrogen compressor in the diesel hydrogenation unit are calculated and analysized. It is found that gas pulsation, mechanical resonance, reduction of medium purity, insufficient rigidity of the support and support platform, pipeline with excessive elbows and unreasonable directions are the main causes of vibration increase. The gas pulsation and piping vibration of the adjusted pipeline system are calculated and analyzed, and the results show that under the same working conditions after the transformation, the flange of MV11901 pipeline, the first-stage intake cut-off ball valve, the first-stage intake buffer, and the nitrogen injection pipeline of the first stage air intake have severely vibrations, and the vibration frequency is adjusted to 12,9,7,12 Hz respectively, avoiding the first three excitation frequencies of the unit, and the vibration speed is respectively reduced from 8.9,2.8,4.9,15.3 mm/s to 1.6,2.3,2.6,3.2 mm/s, and the vibration displacement is reduced from 0.360,0.540,0.509,0.408 mm to 0.064,0.085,0.050,0.073 mm, which prove the effectiveness of the revamping measures.

Key words: fresh hydrogen compressor, piping system, gas pulsation, piping vibration, mode analysis, vibration reduction measures