Aiming at diversity

uncertainty and concurrency characteristics of failure of the reciprocating diaphragm pump

a fault diagnosis method for reciprocating diaphragm pump based on wavelet packet energy spectrum is proposed.Wavelet packet can decompose vibration signal to different sub-bands

and through each sub-band signal energy changes

reflects equipment operating conditions.Through the acquisition of reciprocating diaphragm pump vibration signal

the wavelet packet decomposes to multiple sub-bands

calculates the energy and energy ratio of each band

and then compare energy ratio spectrum of fault vibration signal and normal vibration signal to find failure feature frequency

so as to find out the fault characteristic frequency of the reciprocating diaphragm pump

and diagnoses the failure.The experiments show that the reciprocating diaphragm pump fault diagnosis by using wavelet packet energy spectrum is feasible and effective.