Research on Fault Diagnosis Method for Crankshaft of Drilling Pump Based on Operational Deflection Analysis
Crankshaft is the critical component of the drive system of drilling pump. A new state feature extraction method for crankshaft based on operational deflection analysis is presented in this paper. The superiority, feasibility and validity of the system deflection analysis method are figured out with comparison of traditional methods. The vibration deflection technique can supplement with the time-frequency variation of key parts of the crankshaft for the normal measurement information on which the system fault diagnosis is processed. The process illustrates that the method of vibration defection analysis can extract the working state feature entirely and accurately, while provide the valid support for the corresponding fault mode recognition.