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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kun Zhang Jinyong Yao Tongmin Jiang Xizhong Yin Xiaobo Yu |
| Copyright Year | 2013 |
| Description | Author affiliation: Shaanxi Qinfeng Hydraulics Co., Ltd., Hanzhong, China (Xizhong Yin; Xiaobo Yu) || Sch. of Reliability & Syst. Eng., Beihang Univ., Beijing, China (Kun Zhang; Jinyong Yao; Tongmin Jiang) |
| Abstract | This paper presents a simulation analysis method of degradation behavior for electro-hydraulic servo valve (EHSV). Unlike traditional statistical methods, our work is motivated by the failure mechanism of erosion wear. We assume that degradation trend of flow characteristic is related to structure wear in the valve components. Hence, in this paper, twin flapper-nozzle servo valve is considered as an example to analyze the degradation behavior in a simulation way. First, erosion wear rates at the precise structure are obtained in hydraulic oil of contaminant class 12 by the Computational Fluid Dynamics (CFD) models. Then, degradation trends of null leakage are simulated under different erosive wear conditions. Finally, the relationship between wear in the valve structure and degradation in null leakage is obtained by the testing data. The simulation results show that erosion wear happens at three sites i.e. the flapper surface, the nozzle outlet and sharp edges of the spool. Moreover, erosion wear of sharp edges greatly influences the flow rate of null leakage. The feasibility of our approach in analyzing degradation trend of hydraulic components is validated by the simulation experiments. |
| Starting Page | 1 |
| Ending Page | 7 |
| File Size | 3050275 |
| Page Count | 7 |
| File Format | |
| e-ISBN | 9781467357234 |
| DOI | 10.1109/ICPHM.2013.6621417 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-24 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Degradation Analytical models Surface contamination Computational fluid dynamics Valves Reliability Servomotors |
| Content Type | Text |
| Resource Type | Article |
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