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Coupling behavior between adhesive and abrasive wear mechanism of aero-hydraulic spool valves

Chinese Journal of aeronautics 2016年第4期29卷 1119-1131页

作者： Chen Yunxia Gong Wenjun Kang Rui School of Reliability and Systems Engineering Beihang University

Leakage due to wear is one of the main failure modes of aero-hydraulic spool valves. This paper established a practical coupling wear model for aero-hydraulic spool valves based on dynamic system modelling theory. Firstly, the experiment for wear mechanism verification proved that adhesive wear and abrasive wear did coexist during the working process of spool valves. Secondly coupling behavior of each wear mechanism was characterized by analyzing actual time-variation of model parameters during wear evolution process. Meanwhile, Archard model and three-body abrasive wear model were utilized for adhesive wear and abrasive wear, respectively. Furthermore, their coupling wear model was established by calculating the actual wear volume. Finally, from the result of formal test, all the required parameters for our model were obtained. The relative error between model prediction and data of pre-test was also presented to verify the accuracy of model, which demonstrated that our model was useful for providing accurate prediction of spool valve's wear life. (C) 2016 The Authors. Production and hosting by Elsevier Ltd. on behalf of Chinese Society of aeronautics and Astronautics.

关键词： Abrasive wear Adhesive wear aero-hydraulic spool valves Coupling effects Dynamic model

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