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Life Prediction of Elastomeric U Seals in Hydraulic/Pneumatic Actuators Using NSWC Handbook

NSWC를 활용한 유공압 액추에이터 U 형 씰의 수명예측

  • Shin, Jung Hun (Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation) ;
  • Chang, Mu Seong (Reliability Assessment Center, Korea Institute of Machinery & Materials) ;
  • Kim, Sung Hyun (Reliability Assessment Center, Korea Institute of Machinery & Materials) ;
  • Jung, Dong Soo (Reliability Assessment Center, Korea Institute of Machinery & Materials)
  • 신정훈 (대구경북첨단의료산업진흥재단 첨단의료기기개발지원센터) ;
  • 장무성 (한국기계연구원 신뢰성평가센터) ;
  • 김성현 (한국기계연구원 신뢰성평가센터) ;
  • 정동수 (한국기계연구원 신뢰성평가센터)
  • Received : 2014.02.21
  • Accepted : 2014.08.24
  • Published : 2014.12.01

Abstract

Even the rough prediction of the product test time before the lifetime test of mechanical component begins would be of use in estimating cost and deciding how to keep up with the test. The reliability predictions of mechanical components are difficult because failure or degradation mechanisms are complicated, and few plausible databases are available for lifetime prediction. Therefore, this study conducted lifetime predictions of elastomeric U seals that were respectively installed in a hydraulic actuator and a pneumatic actuator using lifetime models and a field database based on failure physics and an actual test database obtained from the NSWC handbook. To validate the results, the predicted failure rates were compared with the actual lifetime test results acquired in the lab durability tests. Finally, this study discussed an engineering procedure to determine the coefficients in the failure rate models and analyzed the sensitivity of each influential parameter on the seal lifetime.

Keywords

Reliability Prediction;Elastomeric Seal;Naval Surface Warfare Center;Failure Rate Model

References

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