1185. Fault diagnosis of pump valve spring based on improved singularity analysis

• Published in: Journal of Vibroengineering Vol. 16; no. 2; pp. 704 - 712
• Main Authors: Songyong, Liu, Xiaohui, Liu, Xiaoming, Han, Xinxia, Cui
• Format: Journal Article
• Language: English
• Published: JVE International Ltd 01.03.2014
• Subjects: Analysis; Equipment and supplies; Fault location (Engineering); Identification and classification; Mechanical properties; Springs (Mechanism); Valves; Wavelet transforms
• ISSN: 1392-8716

The fracture of pump valve springs is another typical fault of emulsion pump with high pressure and large discharge, which greatly influences the volumetric efficiency of emulsion pump. The fault diagnosis on pump valve springs of emulsion pump was analyzed based on the singularity analysis of continuous wavelet transform. The improved method for Lipschitz index was presented with better robustness and efficiency based on the Least Square Method. The criterion for the fracture of pump valve was confirmed. Diagnostic results indicate that it is accurate and effective of the improved method to locate the singularity of signals, identify the moment when the valve disc impacts on base or lift limiter and judge the fault diagnosis of pump valve.