Abstract: The integral natural gas compressor is widely used in the petrochemical industry, the normal operation of the compressor has an important effect on safety production. In order to improve the integral compressor valve fault diagnosis problem, on the basis of decomposition and reconstruction principle of Daubechies wavelet function of ZTY470 type integral type natural gas compressor vibration signals, introduces the fault diagnosis process to the energy of vibration signal as fault feature. The fault vibration signal of gas valve and spring fracture is analyzed with wavelet packets, and compared with the signal during the normal operation. Experiments show that this method can accurately carry out fault diagnosis and fault location, proved the validity of integral type natural gas compressor valve fault diagnosis.

Key words: GAS compressor, Valve, Vibration, Fault diagnosis