I’m seeking help from experts to investigate the reasons behind the current operating conditions of the air compressor

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The amount of rich gas at the compressor inlet is low, and the unit’s speed is high, which causes vibration in the compressor. The vibration of the steam compressor has increased compared to the previous cycle, while there is no significant rise in bearing temperature. Operating conditions of the compressor in the previous cycle: Inlet rich gas volume, Nm3/h; Compressor speed, rpm; Steam supply to the turbine, t/h; Opening degree of the recirculation rich gas valve, %; Recirculation rich gas volume, Nm3/h: 16623, 9527, 12.4, 62, 4800. Vibration at the rear end of the compressor, YIA501, in ums; Vibration at the rear end of the compressor, YIA502, in ums; Vibration at the front end of the compressor, YIA503, in ums; Vibration at the front end of the compressor, YIA504, in ums. Vibration at the rear end of the turbine, YIA507, in ums; Vibration at the rear end of the turbine, YIA508, in ums; Vibration at the front end of the turbine, YIA505, in ums; Vibration at the front end of the turbine, YIA506, in ums: 54.9, 47.3, 70.6, 76.3, 89.3, 80.7, 40.8, 39.2. file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg Operating conditions of the compressor in the current cycle: Inlet rich gas volume, Nm3/h; Compressor speed, rpm; Steam supply to the turbine, t/h; Opening degree of the recirculation rich gas valve, %; Recirculation rich gas volume, Nm3/h: 14700, 10100, 12.6, 62, 4800. Vibration at the rear end of the compressor, YIA501, in ums; Vibration at the rear end of the compressor, YIA502, in ums; Vibration at the front end of the compressor, YIA503, in ums; Vibration at the front end of the compressor, YIA504, in ums. Vibration at the rear end of the turbine, YIA507, in ums; Vibration at the rear end of the turbine, YIA508, in ums; Vibration at the front end of the turbine, YIA505, in ums; Vibration at the front end of the turbine, YIA506, in ums: 63.1, 53.3, 67.8, 78.6, 94.9, 84.7, 37.5, 38.1. file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.jpg