Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Effect of Shaft Misalignment on Bending Strength of Helical Gear for Metro Vehicles

전동차용 헬리컬기어의 축 조립오차에 따른 굽힘강도의 영향

  • Lee, Dong-Hyung (Advanced Railroad Vehicle Division, Korea Railroad Research Institute) ;
  • Choi, Don-Bum (Propulsion System Research Department, Korea Railroad Research Institute) ;
  • Kang, Seong-Woong (Yujin Machinery LTD.) ;
  • Choi, Ha-Young (Dept. of Mechanical Engineering, Dongyang Mirae UNIV.)
  • 이동형 (한국철도기술연구원 차량융합기술연구실) ;
  • 최돈범 (한국철도기술연구원 추진시스템연구실) ;
  • 강성웅 (유진기공산업(주)) ;
  • 최하영 (동양미래대학교 기계공학부)
  • Received : 2021.11.23
  • Accepted : 2021.12.11
  • Published : 2022.02.28
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Abstract

Gear designers need to select the proper tolerances for deviations in both the center distance and parallelism of axes because these deviations cause high stresses and lead to fatigue breakage of the teeth. In this study, a three-dimensional finite element analysis model was developed for a helical gear used in metro vehicles, and a bending stress analysis method for gear pairs was established according to the contact position change. Using this model, the effect of shaft misalignment due to the center distance and shaft parallelism deviations on the bending stress of the gear was analyzed. As a result, the magnitude of the bending stress changed nearly linearly with the change in the center distance deviation. The tooth contact of the helical gear is biased toward the end of the tooth width when the parallelism deviations of the shaft occur, and the tooth root bending stress increases.

Keywords

Acknowledgement

This research was supported by a grant from R&D Program of the Korea Railroad Research Institute, Republic of Korea.

References

  1. Hotait, M. A., Talbot, D., & Kahraman, A., "An Investigation of the Influence of Shaft Misalignments on Bending Stresses of Helical Gear With Lead Crown," Proceedings of the ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Vol. 7 Las Vegas, Nevada, USA. Sep.,pp. 929-937, 2007.
  2. Kumar, P., Hirani, H., & Agrawal, A. K., "Effect of gear misalignment on contact area: Theoretical and experimental studies," Measurement, Vol. 132, pp. 359-368, 2019.
  3. Lisle, T. J., Shaw, B. A., & Frazer, R. C., "External spur gear root bending stress: A comparison of ISO 6336:2006, AGMA 2101-D04, ANSYS finite element analysis and strain gauge techniques," Mechanism and Machine Theory, Vol. 111, pp. 1-9, 2017. https://doi.org/10.1016/j.mechmachtheory.2017.01.006
  4. International Organization for Standardization. ISO 6336-3, Calculation of Load Capacity of Spur and Helical Gears-Part 3: Calculation of tooth bending strength, International Organization for Standardization, Geneva, Switzerland, 2019.
  5. Standard ANSI/AGMA 2001-D04, Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth, American Gear Manufacturers Association, Alexandria, 2004.
  6. Lee, S., Lee, D. H., Hwang, S. C., & Lee, K. H., "Stress Analysis of Helical Gear for a Railway Reducer," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 11, No. 2, pp. 55-59, 2012.
  7. Lias, M. R., Rao, T. V. V. L. N., Awang, M., & Khan, M. A., "The Stress Distribution of Gear Tooth Due to Axial Misalignment Condition," Journal of Applied Sciences, Vol. 12, pp. 2404-2410, 2012. https://doi.org/10.3923/jas.2012.2404.2410
  8. Shehata, A., Adnan, M. A., & Mohammed, O. D., "Modeling the effect of misalignment and tooth microgeometry on helical gear pair in mesh," Engineering Failure Analysis, Vol. 106, 104190, 2019. https://doi.org/10.1016/j.engfailanal.2019.104190
  9. KISSSoft AG. KISSSoft Release 03/2012 User Manual. Bubikon, Switzerland, 2013.
  10. Systemes D. Abaqus analysis user's guide. Simulia Corp. Providence, RI, USA, ver. 6.13, 2013.
  11. International Organization for Standardization, ISO/TR 10064-3, Code of inspection practice - Part 3: Recommendations relative to gear blanks, shaft centre distance and parallelism of axes, International Organization for Standardization, Geneva, Switzerland, 1996.
  12. Japan Gear Manufacturers Association, JGMA 1102-01, Parallelism of axes for spur and helical gears, Japan Gear Manufacturers Association, Tokyo, 2000.