THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Mathematical model of energy efficiency in spur gears

ABSTRACT
The impact of geometric parameters of teeth and lubricating oils to the efficiency of utilization of involute spur gears, when the transverse contact ratio is 2 < εα ≤ 3, has been analyzed in this paper. The mathematical model and computer program for determining the current and the effective value of the efficiency of utilization have been developed. The influence of the character of load distribution and energy losses due to heating effects during the meshing period is included in the factor of load distribution. The results of computer simulation are given in the form of a diagram of the current values of the efficiency of utilization during the meshing period. Also, the values of effective efficiency of utilization for the considered cylindrical gear pairs have been calculated.
KEYWORDS
PAPER SUBMITTED: 2018-01-18
PAPER REVISED: 2018-12-20
PAPER ACCEPTED: 2019-01-31
PUBLISHED ONLINE: 2019-03-09
DOI REFERENCE: https://doi.org/10.2298/TSCI180118074D
REFERENCES
  1. Ristivojević, M. R., Mitrović, R. M., Load Distribution - Gear Pairs and Roller Bearings (in Serbian), Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia, 2002
  2. Rosić, B. B., Planetary Gears - Cylindrical Internal Pairs (in Serbian), Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia, 2003
  3. Blagojević, I. A., et al., Energy Efficiency Improvement by Gear Shifting Optimization, Thermal Science, 17 (2013), 1, pp. 91-105
  4. Blagojević, I. A., et al., The Effects of Gear Shift Indicator Usage on Fuel Efficiency of a Motor Vehicle, Thermal Science, 21 (2017), 1B, pp. 707-713
  5. Baglioni S., et al., Influence of the Addendum Modification on Spur Gear Efficiency, Mechanism and Machine Theory, 49 (2012), pp. 216-233
  6. Anderson, N. E., Loewenthal, S. H., Efficiency of Nonstandard and High Contact Ratio Involute Spur Gears, Journal of Mechanisms, Transmissions, and Automation in Design, 108 (1986), 1, pp. 119-126
  7. Benedict, G. H., Kelly, B. W., Instantaneous Coefficients of Gear Tooth Friction, ASLE Transactions, 4 (1961), 1, pp. 59-70
  8. Dowson, D., Higginson, G. R., Elastohydrodynamic Lubrication, SI Edition, Pergamon Press Ltd., Oxford, England, UK, 1977
  9. Wang, Y., et al., Transient Thermoelastohydrodynamic Lubrication Analysis of an Involute Spur Gear, Tribology International, 37 (2004), 10, pp. 773-782
  10. Kahraman, A., et al., Development of a Generalized Mechanical Efficiency Prediction Methodology for Gear Pairs, Department of Mechanical Engineering, The Ohio State University, Columbus, Ohio, USA, 2005