Reciprocating Compressor Fault Diagnosis And Failure Behavior Of The Key Components

6M25 reciprocating compressor is the core equipment to compress gas in the petroleum and the chemical industry. Its structure is complex, and components are many, and working environment is bad. The faults of components always make the compressor operation under insecure conditions and bring the serious economic loss to enterprise. Establishes on-line state monitoring and fault diagnosing system to promptly get the state of the equipment and know the unusual of the equipment in advance, and to reduce the failure rate of the equipment and carry on the maintenance promptly. Moreover, carries on the invalid behavior analysis to core components. According to invalid reasons to optimize the parts' design variable to realize the equipment's secure stable and long period operation.Firstly, to carefully research 6M25 reciprocating compressor's faults and its reasons.Secondly, carries on the invalid behavior analysis to the core component—crankshaft. Carries on the crankshaft's static mechanics analysis and model analysis to obtain its fault situation and natural frequency and vibrating forms. Moreover, carries on the analysis to the crankshaft with crack, knows that the crack cause the crankshaft's natural frequency to be changed obviously ,and the natural frequency's change can be one of standards to judge the crack's occur.Thirdly, carries on the invalid behavior analysis to the core component—piston rod. Analyzes the natural frequency and vibrating forms of the piston rod .Its natural frequency is lower than the driving frequency. It cannot cause the system's resonance. Moreover, carries on the analysis to the piston rod on its break and gives the design proposal to change the compressor's capability.Finally, combined with the industrial scene condition to construct the structure of fault diagnosis to diagnose the faults.