Fatigue Life Prediction of Spherical Gear Couplings

  1. Ibai Ulacia 1
  2. Jon Larrañaga 1
  3. Aitor Arana 1
  4. Aurea Iñurritegi 1
  5. Julen Elizegi 1
  1. 1 Mondragon Unibertsitatea
Revista:
Power Transmission Engineering

ISSN: 2331-2483

Any de publicació: 2019

Volum: 13

Número: 1

Pàgines: 48-53

Tipus: Article

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Altres publicacions en: Power Transmission Engineering

Resum

Classical coupling load models, still in use, assume a number of teeth in contact for a certain amount of misalignment.However, these models do not account for the tooth stiffness, applied torque or manufacturing errors, which producea sequential engagement of spline teeth. Therefore stressescould be overestimated and thus fatigue life predictions arerendered inaccurate. Recently, several studies have beenperformed in order to account for tooth stiffness and toothspacing errors of such couplings. However, they were onlyapplied in relatively small misalignments (approx. up to 1degree), compared with the case studied in this research (upto 7 degrees).In this work a numerical model has been developed inorder to predict the fatigue life of highly crowned spline coupling geometry. First, the number of teeth in contact hasbeen evaluated for different misalignment and torque conditions. Next, the fatigue life predictions have been calculatedbased on the numerically obtained stresses. Finally, fatiguetests have been performed in order to validate the developedmethodology. It is observed that the numerically estimatedcycles to fatigue failure are close to the experimentally measured fatigue life.

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Informació de finançament

The authors would like to acknowledge the Basque Government for the financial support through LEUNGOR project (ZL-2016/00534).

Referències bibliogràfiques

  • 1. Dudley, D.W. “When Splines Need Stress Control,” Product Engineering, 1957, pp. 56- 61.
  • 2. Curà, F. and A. Mura. “Experimental and Theoretical Investigation About Reaction Moments in Misaligned Splined Couplings,” Mechanical Systems and Signal Processing, 2014, 45, pp. 504–512.
  • 3. Henriot, G. Engrenages – Conception – Fabrication – Mise en oeuvre, 8e éd. Dunod, 2013.
  • 4. Mancuso, J.R. Couplings and Joints: Design, Selection, and Application, 1986, Ed. M. Dekker.
  • 5. Guo, Y., S. Lambert, R. Wallen, R. Errichello and J. Keller. “Theoretical and Experimental Study on Gear-Coupling Contact and Loads Considering Misalignment, Torque, and Friction,” 2016, Mechanism and Machine Theory, 98, pp. 242–262.
  • 6. Alfares, M.A., A.H. Falah and A.H. Elkholy. “Clearance Distribution of Misaligned Gear Coupling Teeth Considering Crowning and Geometry Variations,” 2006, Mechanism and Machine Theory, 41, pp. 1258–1272.
  • 7. Chase, K.W., C.D. Sorensen and B.J.K. DeCaires. “Variation Analysis of Tooth Engagement and Loads in Involute Splines,” 2010, IEEE Transactions on Automation Science and Engineering, 7, pp. 746–754.
  • 8. Larrañaga, J., A. Arana, I. Ulacia, I. Torca and J.A. Esnaola. “Misalignment Effect on Contact and Stress Pattern of Spline Couplings,” 5th Internation Conference on Power Transmission, Ohrid, Macedonia, 2016.
  • 9. Fleiss, R. “Das Radial-und Axialverhalten von Zahnkupplungen,” 1977, PhD. thesis, TU Darmstadt.
  • 10. Beckmann. “Beitrag zur Auslegung und Konstruktion von BalligzahnKupplungen,” 2005, PhD thesis, TU Chemnitz.
  • 11. Avilés, R. Análisis de Fatiga en Máquinas, 2005, Ed. Thomson-Paraninfo (in Spanish).
  • 12. Ulacia, I., A. Arana, J. Maskariano and J. Larrañaga. “Analysis of Wear in Crowned Spline Couplings,” 2018, LUBMAT: Lubricants, Tribology and Condition Monitoring Conference, San Sebastian, 2018.