Influence of the Carrier Pinhole Position Errors on the Load Sharing of a Planetary Gear Train

  • Jeong-Gil Kim
  • Young-Jun Park
  • Sang-Dae Lee
  • Joo-young Oh
  • Jae-Hoon Kim
  • Geun-Ho Lee
Regular Paper


Load sharing among planetary gears, one of the design variables, has a significant influence on the performance and service life of a gearbox. This study involved simulating and testing the design parameters related to load sharing among planetary gears. In this regard, the influence of errors in the carrier pinhole position on the load sharing among the planetary gears was analyzed. The results showed that the difference between the simulation results using the model and the laboratory test results was less than 10%. Furthermore, similar tendencies were observed according to the magnitude of the load applied to the planetary gears. As for the design parameters affecting load sharing, the service life of a gearbox containing planetary gears can be extended by using a floating system as opposed to a non-floating system. In addition, reduced planetary pin diameter and increased planetary bearing clearance leads to appropriate load sharing among the planetary gears and increases the service life and floating effect of the gearbox.


Planetary gearbox Carrier Pinhole position error Load sharing 


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  1. 1.
    American Gear Manufacturers Association, “Design Manual for Enclosed Epicyclic Gear Drives,” ANSI/AGMA 6123-B6106, 2006.Google Scholar
  2. 2.
    American Gear Manufacturers Association (AGMA), “Accuracy Classification System-Tangential Measurements for Cylindrical Gears,” ANSI/AGMA 2015-1-A01, 2002.Google Scholar
  3. 3.
    Kahraman, A., “Load Sharing Characteristics of Planetary Transmissions,” Mechanism and Machine Theory, Vol. 29, No. 8, pp. 1151–1165, 1994.MathSciNetCrossRefGoogle Scholar
  4. 4.
    Kahraman, A. and Vijayakar, S., “Effect of Internal Gear Flexibility on the Quasi-Static Behavior of a Planetary Gear Set,” Journal of Mechanical Design, Vol. 123, No. 3, pp. 408–415, 2001.CrossRefGoogle Scholar
  5. 5.
    Bodas, A. and Kahraman, A., “Influence of Carrier and Gear Manufacturing Errors on the Static Load Sharing Behavior of Planetary Gear Sets,” JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing, Vol. 47, No. 3, pp. 908–915, 2004.CrossRefGoogle Scholar
  6. 6.
    Singh, A., “Application of a System Level Model to Study the Planetary Load Sharing Behavior,” Journal of Mechanical Design, Vol. 127, No. 3, pp. 469–476, 2005.CrossRefGoogle Scholar
  7. 7.
    Link, H., LaCava, W., van Dam, J., McNiff, B., Sheng, S., et al., “Gearbox Reliability Collaborative Project Report: Findings from Phase 1 and Phase 2 Testing”, Technical Report NREL/TP-5000-51885, NREL, Colorado, USA, 2011.CrossRefGoogle Scholar
  8. 8.
    LaCava, W. and McNiff, B., “Gearbox Reliability Collaborative: Test and Model Investigation of Sun Orbit and Planet Load Share in a Wind Turbine Gearbox,” Proc. of 53rd AIAA/ASME/ASCE/AHS/ ASC Structures, Structural Dynamics and Materials Conference, AIAA 2012-1418, 2012.Google Scholar
  9. 9.
    Kim, J.-G., Park, Y.-J., Lee, G.-H., and Kim, J.-H., “An Experimental Study on the Effect of Carrier Pinhole Position Errors on Planet Gear Load Sharing,” International Journal of Precision Engineering and Manufacturing, Vol. 17, No. 10, pp. 1305–1312, 2016.CrossRefGoogle Scholar
  10. 10.
    Romax Technology Ltd., “Romax Designer Software Manual,” 2003.Google Scholar
  11. 11.
    Abe, T., Cheng, Y., and Felice, M., “Advanced CAE Methods for Automotive Drivetrain System Gear Whine Optimization,” Proc. of MPT2009-Sendai, JSME International Conference on Motion and Power Transmission, pp. 1–15, 2009.Google Scholar
  12. 12.
    Pears, J., Curtis, S., Poon, A., Smith, A., Poon, D., and Palmer, D., “Investigation of Methods to Predict Parallel and Epicyclic Gear Transmission Error,” SAE Technical Paper, No. 2005-01-1818, 2005.CrossRefGoogle Scholar
  13. 13.
    Pears, J., Smith, A., Platten, M., Abe, T., Wilson, B., et al., “Predicting Variation in the NVH Characteristics of an Automatic Transmission Using a Detailed Parametric Modelling Approach,” SAE Technical Paper, No. 2007-01-2234, 2007.CrossRefGoogle Scholar
  14. 14.
    Kamaya, F., Eccles, M., and Pears, J., “A Rapid Method for the Investigation of System-Wide Parameter Variation Effects on Epicyclic Gear Whine,” Transactions of Society of Automotive Engineers of Japan, Vol. 39, No. 6, pp. 6_47–46_52, 2008.Google Scholar
  15. 15.
    Hayashi, T., Li, X. Y., Hayashi, I., Endo, K., and Watanabe, W., “Measurement and Some Discussions on Dynamic Load Sharing in Planetary Gears,” Bulletin of JSME, Vol. 29, No. 253, pp. 2290–2297, 1986.CrossRefGoogle Scholar
  16. 16.
    Park, Y.-J., Lee, G.-H., Kim, J.-K., Song, J.-S., and Park, S.-H., “Analysis of Load Distribution and Sharing on the Planetary Reducer for Wind Turbines,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 20, No. 6, pp. 830–836, 2011.Google Scholar
  17. 17.
    Park, Y.-J., Lee, G.-H., Nam, Y.-Y., and Kim, J.-K., “Influence of Flexible Pin for Planets on Service Life of Wind Turbine Gearboxes,” Transactions of the Korean Society of Mechanical Engineers A, Vol. 36, No. 9, pp. 953–960, 2012.CrossRefGoogle Scholar
  18. 18.
    Hong, S. O. and Cho, G. J., “A Study on Preload and Arragement of Combined Bearing on Feed Drive System,” Proc. of KSMTE Autumn Conference, pp. 440–445, 1999.Google Scholar
  19. 19.
    Lee, C.-H., “Optimization of Spindle Units Considering the Decrease of Bearing Stiffness at High Speed Revolution,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 19, No. 6, pp. 717–723, 2010.Google Scholar
  20. 20.
    Yeo, E. G., Kim, Y. R., Han, G. G., Park, M. U., Yu, H. I., and Lee, Y. S., “A Study on the Effects of the Bearing Parameters on the Main Spindle Design of Machine Tool,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 7, No. 1, pp. 119–119, 1998.Google Scholar
  21. 21.
    Kim, J.-G., Park, Y.-J., Lee, G.-H., and Kim, J.-H., “Effects of Bearing Characteristic on the Gear Load Distribution in the Slewing Reducer for Excavator,” Journal of the Korean Society of Manufacturing Process Engineers, Vol. 13, No. 5, pp. 8–14, 2014.CrossRefGoogle Scholar

Copyright information

© Korean Society for Precision Engineering and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Convergence Components & Agricultural Machinery GroupKorea Institute of Industrial TechnologyJeollabuk-doRepublic of Korea
  2. 2.Department of Biosystems and Biometerials Science and EngineeringSeoul National UniversitySeoulRepublic of Korea
  3. 3.Research Institute for Agriculture and Life SciencesSeoul National UniversitySeoulRepublic of Korea
  4. 4.Construction Equipment R&D GroupKorea Institute of Industrial TechnologyGyeongsangbuk-doRepublic of Korea
  5. 5.School of Mechanical EngineeringChungnam National UniversityDaejeonRepublic of Korea
  6. 6.Department of Smart Machine TechnologyKorea Institute of Machinery and MaterialsDaejeonRepublic of Korea

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