对某船用燃气轮机异常振动故障的分析与研究

Analysis and Research on Abnormal Vibration Faults of a Marine Gas Turbine

针对某船用燃气轮机使用中异常振动现象,开展了振动监测。通过数据处理与分析,提取了振动故障特征,基于这些特征认为该燃气轮机存在碰摩、转子支承松动、平衡不良等问题。对故障燃气轮机拆检进行了跟踪,拆检结果与先前分析判断基本相符。综合振动故障特征和拆检结果,研究探讨异常振动现象产生原因与相关机理。本例故障较为少见,相关问题分析及结论可作为船用燃气轮机类似故障诊断参考。

Abnormal phenomena of a marine gas turbine,and vibration monitoring was conducted to analyze the phenomena.After data processing and analysis,vibration fault characteristics were extracted.Based on the characteristics,the marine gas turbine was considered to have the problems of the rub-impact fault,rotor support bearing looseness and poor dynamic balance.The overhauling process of the faulty gas turbine was tracked,and the inspection results are basically consistent with the earlier analysis.According to the vibration fault characteristics and the overhauling results,the reason and mechanism of the abnormal vibration were discussed.The fault case is relatively rare in marine gas turbine,and the analysis and conclusions of relevant issues can serve as a reference for diagnosing similar faults.