| Vibration failure is the most common mode which may result in compressor tripped even damage the machine,it will cause potential safety hazards to the operation of the equipment or directly cause the equipment to fail on operate normally,that bringing irreparable losses to the equipment users.Therefore,how to prevent,detect and diagnose vibration is an important research direction of robust design,fault diagnosis and maintenance of centrifugal compressor.In this paper,a three-stage compression with three-axis and integral gearbox was taken as the research object,and the design principles of structural components related to vibration were systematically analyzed.The static and dynamic models were established by using XLROTOR software,and the rotor dynamic characteristics and critical speed of the rotor system were analyzed and verified to maintain a safe margin.The vibration test platform is established by installing 10 eddy current displacement sensors.Based on the frequency spectrum analysis of Fourier transform,the principle analysis of rotating system,bearing system,rotating stall of impellers and other common vibration faults is made,and the vibration frequency characteristics of the compressor system under different reasons are obtained.From the experience of actual design/production and analysis results,the corresponding solutions are put forward.Through the systematic analysis and research,combining theory with practice,some ideas and methods are provided for the design,vibration prevention and fault diagnosis of centrifugal compressors of this type or similar structure. |
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