Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Study on the Prediction of Storage Life of Rolling Element Bearings for the Single-use Turbo Engine

일회성 터보엔진용 구름 베어링의 저장 수명 예측에 관한 연구

  • Sun Je Kim (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Dong Min Kim (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Soon Ho Hong (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Seong Ki Min (Aerospace Technology Research Institute, Agency for Defense Development)
  • 김선제 ;
  • 김동민 ;
  • 홍순호 ;
  • 민성기
  • Received : 2022.10.19
  • Accepted : 2022.12.14
  • Published : 2022.12.31
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Abstract

Operational reliability of the single-use turbo engine for guided weapons must be guaranteed even after long-term storage. Rolling element bearings have a great influence on the operational reliability of the turbo engine, however changes in micro dimensions of bearings by an oxide layers on rolling elements and raceways may cause failures after long-term storage. In this study, changes in dimensions of bearings were measured and roughness of rolling elements was used for estimating the storage life. Storage life estimation was performed via two kinds of methods, Weibayes method and random sample generation method. The results of two methods were compared and their characteristics were analyzed. This study will contribute to establish an efficient maintenance schedule for the single-use turbo engine.

유도무기용 일회성 터보엔진은 장기간 저장 후에도 운용 신뢰성이 보장되어야 한다. 터보엔진의 운용 신뢰성에 큰 영향을 미치는 구름 베어링은 장시간 저장에 의해 궤도면 및 전동체에 산화층이 형성될 수 있으며, 이로 인해 미세 치수의 변화를 유발하여 고장이 발생할 수 있다. 본 연구에서는 실제 장기 저장된 일회성 터보엔진 베어링을 획득하고, 전동체 조도의 열화 데이터를 이용하여 저장 수명을 예측하였다. 저장 수명은 와이베이즈(Weibayes) 분석 방법과 선형 열화식의 계수를 난수로 생성하는 난수 생성 기반 분석 기법을 통해서 예측하였다. 본 연구에서는 두 가지 수명평가 방법의 결과를 상호 비교하고 이에 따른 장단점을 분석하였다. 향후, 추가적인 장기저장 시편을 확보하고, 명확한 고장 조도 기준을 수립하면 베어링의 저장 수명 예측정확도를 높일 수 있을 것이며, 터보엔진의 효율적인 정비 주기 설정에 기여할 수 있을 것이다.

Keywords

Acknowledgement

본 연구는 국방과학연구소와 LIG넥스원의 지원으로 수행된 연구임(과제명: 장기운용 베어링 검사결과 분석 기술용역).

References

  1. Chang, M.-S., Lee, C.-S., Park, J.-W., Kim, Y.-I. and Kim, S.J., "Storage Reliability Assessment of Springs for Turbo Engine Components," Journal of the Korean Society of Propulsion Engineers, Vol. 23, No. 4, pp. 42-49, 2019. https://doi.org/10.6108/KSPE.2019.23.4.042
  2. Kim, S.J., "Analytical Consideration of the Radial Clearance to Reduce Cage Slip of the Turbo Engine Roller Bearing," Journal of Mechanical Science and Technology, Vol. 35, No. 7, pp. 2827-2839, 2021. https://doi.org/10.1007/s12206-021-0606-0
  3. Kim, S.J. and Kim, Y.R., "A Study of Loading Conditions for Developing the High-speed Bearings of the Gas-turbine Engine," Journal of the Korean Society of Propulsion Engineers, Vol. 19, No. 4, pp. 102-109, 2015. https://doi.org/10.6108/KSPE.2015.19.4.102
  4. Super-precision Bearings, SKF, March 2016.
  5. Harris, T.A. and Barnsby, R.M. "Life Rating of Ball and Roller Bearings," Proc. IMechE, Part J: J. Engineering Tribology, Vol. 215, No. 6, pp. 577-595, 2001. https://doi.org/10.1243/1350650011543817
  6. Lundberg, G. and Palmgren, A., "Dynamic Capacity of Rolling Bearings," J. Appl. Mech., Vol. 16, No. 2, pp. 165-172, 1949. https://doi.org/10.1115/1.4009930
  7. ISO, Rolling bearings-dynamic load rating and rating life, ISO 218:2007, Geneve, Switzerland, 2007.
  8. Khonsari, M. and Booser, E.R., "Predicting Oil and Grease Life," Machine Design, March 2003.
  9. Varenberg, M., Kligerman, Y., Halperin, G., Nakad, S. and Kasem, H., "Assessing Workability of Greased Bearings after Long-term Storage," Friction, Vol. 7, pp. 489-496, 2019. https://doi.org/10.1007/s40544-018-0255-1
  10. Susanne, B.-F., "Test Method for Simulating the Aging and Oxidation Stability of Lubricants," Machinery Lubrication, March 2005.
  11. Mitcheel, J.C., "Storage Reliability of Missile Materiel Program. Storage Reliability Summary Report. Volume III. Hydraulic and Pneumatic Devices," ADA053409, 1978.
  12. Yang, H.-S., Chang, M.-S., Park, J.-W., Kim, Y.-I. and Kim, S.J., "Accelerated Degradation Test for Bearings of Engine Assembly," 50th KSPE Spring Conference, Jeju, Korea, KSPE 2018-1069, 2018.
  13. ISO, Rolling Bearings-damage and Failures-terms, Characteristics and Causes, ISO 15243:2017, Geneve, Switzerland, 2017.
  14. Bertsche, B., Reliability in Automotive and Mechanical Engineering: Determination of Component and System Reliability, Springer-Verlag Berlin Heidelberg, Germany, 2008.
  15. Park, T.-K., Chang, M.-S., Sung, B.-J., Choi, B.-O. and Yang, C.-K., "Durability Evaluation of the Radiator for Construction Equipment Through Weibayes Analysis," Proceedings of KSME Spring Conference, pp. 530-535, 2014.
  16. Nicholls, D. and Lein, P., "Weibayes Testing: What is the Impact if Assumed Beta is Incorrect?," Annual Reliability and Maintainability Symposium, pp. 37-42, 2009.