한국신뢰성학회지:신뢰성응용연구 (Journal of Applied Reliability)
- 제14권4호
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- Pages.230-235
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- 2014
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- 1738-9895(pISSN)
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- 2733-8320(eISSN)
파일럿형 공기압 방향제어 밸브의 누설 고장판정 기법에 관한 연구
Leakage Failure Determination Method of Pilot Pneumatic Directional Control Valve
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Kang, Bo Sik
(Reliability Assesment Center, Korea Institute of Machinery & Materials) ;
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Kim, Kyung Soo
(Dept. of Green Technology, Korea Construction Equipment Technology Institute) ;
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Chang, Mu Seong
(Reliability Assesment Center, Korea Institute of Machinery & Materials)
- 투고 : 2014.09.10
- 심사 : 2014.11.13
- 발행 : 2014.12.25
초록
The failure modes of pneumatic directional control valves include leakage, wear of the spool seal, and sticking of the spool. Among them, the main failure mode of the valve is leakage. The leakage is caused by the wear of the spool seal. However, due to the characteristics of the seal material, the leakage rate is fluctuated a lot rather than constantly increased over time. If life analysis is performed using the first time data of leakage failure, predicted life cycles can be different from the real life cycles. This paper predicts life cycles of the pilot pneumatic directional control valve based on the three point moving average which considers the average of the fluctuating leakage rate.
키워드