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Bearing Life Evaluation of Automotive Wheel Bearing Considering Operation Loading and Rotation Speed

작동하중과 회전속도를 고려한 자동차용 휠 베어링의 수명평가

  • 이승표 ((주)일진글로벌 기술연구소)
  • Received : 2016.03.04
  • Accepted : 2016.04.25
  • Published : 2016.06.01

Abstract

An automotive wheel bearing is important part that translates rotating motion and bears vehicle weight. Recently, in accordance with the demands for $CO_2$ emission reduction and fuel economy regulation, the requirements for the weight reduction and miniaturization of vehicles has increased. Therefore, life evaluation technology of the bearings has increased in necessity. Since the bearing life is affected by many parameters such as bearing geometry, bearing specifications, and vehicle specifications, it is difficult to predict. In this paper, the bearing life was tested by varying the applied load and rotation speed and comparing them with the basic rating life and modified rating life that were suggested in ISO standards. From the results, it was found that there was a difference between the test life and theoretical life and modified rating life than basic rating life was to be relatively well predicted by test life.

자동차용 휠 베어링은 회전운동을 전달하고 차량의 무게를 지지해주는 중요한 부품이다. 최근 $CO_2$ 배출가스 저감과 연비 규제에 따라서 자동차 경량화 및 소형화 요구는 점점 증가하고 있고, 이에 부응하여 베어링의 수명 평가기술은 더욱 그 필요성이 증가하고 있다. 휠 베어링의 내구수명은 고려해야 할 인자들이 매우 다양하며 이들이 서로 복잡하게 연관되어 있으므로 수명을 예측하는 것이 쉽지 않다. 본 논문에서는 자동차용 휠 베어링의 수명에 영향을 끼치는 많은 인자들 중에서 작동하중과 회전속도를 변화시키면서 수명을 시험하였고, 이를 ISO 국제표준에서 제안하는 이론수명인 기본정격수명과 보정정격수명 결과와 비교하였다. 이들 수명을 비교한 결과, 기본정격수명과 보정정격수명 모두 시험수명과 차이가 존재하며, 기본정격수명 보다 보정정격수명이 시험수명을 상대적으로 잘 예측함을 알 수 있었다.

Keywords

References

  1. Lee, S. P., Kim, B. C., Lee, I. H., Cho, Y. G. and Kim, Y. C., 2012, "Distortion Analysis for Outer Ring of Automotive Wheel Bearing," Trans. Korean Soc. Mech. Eng. A, Vol. 36, No. 12, pp. 1613-1618. https://doi.org/10.3795/KSME-A.2012.36.12.1613
  2. Yoon, K. C. and Choi, D. H., 2000, "A Design of an Automotive Wheel Bearing Unit for Long Life," Trans. Korean Soc. Mech. Eng. A, Vol. 24, No. 2, pp. 319-328. https://doi.org/10.22634/KSME-A.2000.24.2.319
  3. Kim, B. C., Lee, I. H., Kim, K. N., Lee, W. Y. and Lee, S. P., 2011, "Development of Stiffness Analysis Model of Automotive Wheel Bearing due to Ball Contact Angle," Proceedings KSAE Fall conference, pp. 1019-1020.
  4. Stribeck, R., 1907, "Reports From the Central Labora tory for Scientific Investigation," Translation by H. Hess, ASME Transactions, Vol. 29, pp. 420-466.
  5. Goodman, J., 1912, "Roller and Ball Bearings," Min utes of the Proceedings, Vol. 189, pp. 82-127.
  6. Palmgren, A., 1924, "Die Lebensdauer von Kugell Agern (The Service Life of Ball Bearings)," Zeitschrift des Vercines Deutscher Ingenieure, Vol. 68, No. 14, pp. 339-341.
  7. Weibull, W., 1939, "A Statistical Theory of the Strength of Materials," Ingeniorsvetenskapsakademi ens Handlingar, Vol. 151, Stockholm, Sweden.
  8. Lundberg, G. and Palmgren, A., 1947, "Dynamic Capacity of Rolling Bearings," Acta Polytechnica Mechanical Engineering Series, Vol. 1, No. 10, Stockholm, Sweden.
  9. International organization for Standardization, 1990, "Rolling Bearings-Dynamic Load Ratings and Rating Life," ISO281, Geneva.
  10. International Organization for Standardization, 2007, "Rolling Bearings-Dynamic Load Ratings and Rating Life," ISO281, Geneva.
  11. Lee, S. P., Lee, N. Y. and Lee, I. H., 2012, "Bearing Life Calculation by Using the ISO281:2007," Proceed ings KSPE Spring Conference, pp. 903-904.
  12. Lee, S. P., Lee, N. Y., Cha, C. Y., Lee, I. H., Lee, S. R., Kim, W. I. and Kim, T. W., 2012, "Bearing Life Optimization for Automotive Wheel Bearing using Design of Experiments," Proceedings KSME Autumn conference, pp. 281-284.
  13. Kim, T. W., 2014, "A Study on the Verification of ISO 281:2007 Modified Rating Life and the Lifetime Optimization of the Automotive Wheel Bearing Through Tests," Ph.D Thesis, Pusan National University, pp. 20-33.

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