Contact mechanics and elasto-hydrodynamic lubrication analysis of internal-external straight bevel gear mesh in a pericyclic drive

Tanmay D. Mathur, Edward Smith, Liming Chang, Robert C. Bill

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The focus of this work is development of a comprehensive tooth contact analysis model and characterization of lubricant performance in a Pericyclic mechanical transmission utilizing modified straight bevel gears. The Pericyclic drive is kinematically similar to an epicyclic bevel gear train, and is characterized by load sharing over large number of teeth, large shaft angles (175°-178°), nutational gear motion, and high reduction ratio. The load sharing calculation model described in this paper takes into account contact outside involute region and is easily generalized to all bevel epicyclic gear drives. The resulting contact stress field, calculated using Hertz contact stress theory, was validated against FEA solution. A 3-D kinematic analysis of the pericyclic drive was carried out to determine rolling and sliding velocities at contact points. Thereafter, Elastohydrodyamic lubrication (EHL) characteristics viz. film thickness, friction coefficient, and flash temperature were calculated for a sample lubricant. Power losses due to film friction are calculated to determine mesh efficiency. Finally, the effect of input power and profile crowning parameter was studied for all of the above mesh characteristics. The friction coefficient values were found to be in the lower range of EHL contact leading to high efficiency values and a small flash temperature for surfaces in contact.

Original languageEnglish (US)
Title of host publication2017 ASME International Power Transmission and Gearing Conference
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858240
DOIs
StatePublished - Jan 1 2017
EventASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2017 - Cleveland, United States
Duration: Aug 6 2017Aug 9 2017

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume10

Other

OtherASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2017
CountryUnited States
CityCleveland
Period8/6/178/9/17

Fingerprint

Elastohydrodynamic Lubrication
Contact Mechanics
Bevel gears
Epicyclic gears
Contacts (fluid mechanics)
Straight
Lubrication
Mechanics
Hydrodynamics
Mesh
Contact
Friction
Internal
Load Sharing
Contact Stress
Lubricants
Friction Coefficient
Flash
Point contacts
Contact Analysis

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation

Cite this

Mathur, T. D., Smith, E., Chang, L., & Bill, R. C. (2017). Contact mechanics and elasto-hydrodynamic lubrication analysis of internal-external straight bevel gear mesh in a pericyclic drive. In 2017 ASME International Power Transmission and Gearing Conference (Proceedings of the ASME Design Engineering Technical Conference; Vol. 10). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/DETC201768001
Mathur, Tanmay D. ; Smith, Edward ; Chang, Liming ; Bill, Robert C. / Contact mechanics and elasto-hydrodynamic lubrication analysis of internal-external straight bevel gear mesh in a pericyclic drive. 2017 ASME International Power Transmission and Gearing Conference. American Society of Mechanical Engineers (ASME), 2017. (Proceedings of the ASME Design Engineering Technical Conference).
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abstract = "The focus of this work is development of a comprehensive tooth contact analysis model and characterization of lubricant performance in a Pericyclic mechanical transmission utilizing modified straight bevel gears. The Pericyclic drive is kinematically similar to an epicyclic bevel gear train, and is characterized by load sharing over large number of teeth, large shaft angles (175°-178°), nutational gear motion, and high reduction ratio. The load sharing calculation model described in this paper takes into account contact outside involute region and is easily generalized to all bevel epicyclic gear drives. The resulting contact stress field, calculated using Hertz contact stress theory, was validated against FEA solution. A 3-D kinematic analysis of the pericyclic drive was carried out to determine rolling and sliding velocities at contact points. Thereafter, Elastohydrodyamic lubrication (EHL) characteristics viz. film thickness, friction coefficient, and flash temperature were calculated for a sample lubricant. Power losses due to film friction are calculated to determine mesh efficiency. Finally, the effect of input power and profile crowning parameter was studied for all of the above mesh characteristics. The friction coefficient values were found to be in the lower range of EHL contact leading to high efficiency values and a small flash temperature for surfaces in contact.",
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Mathur, TD, Smith, E, Chang, L & Bill, RC 2017, Contact mechanics and elasto-hydrodynamic lubrication analysis of internal-external straight bevel gear mesh in a pericyclic drive. in 2017 ASME International Power Transmission and Gearing Conference. Proceedings of the ASME Design Engineering Technical Conference, vol. 10, American Society of Mechanical Engineers (ASME), ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2017, Cleveland, United States, 8/6/17. https://doi.org/10.1115/DETC201768001

Contact mechanics and elasto-hydrodynamic lubrication analysis of internal-external straight bevel gear mesh in a pericyclic drive. / Mathur, Tanmay D.; Smith, Edward; Chang, Liming; Bill, Robert C.

2017 ASME International Power Transmission and Gearing Conference. American Society of Mechanical Engineers (ASME), 2017. (Proceedings of the ASME Design Engineering Technical Conference; Vol. 10).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Mathur TD, Smith E, Chang L, Bill RC. Contact mechanics and elasto-hydrodynamic lubrication analysis of internal-external straight bevel gear mesh in a pericyclic drive. In 2017 ASME International Power Transmission and Gearing Conference. American Society of Mechanical Engineers (ASME). 2017. (Proceedings of the ASME Design Engineering Technical Conference). https://doi.org/10.1115/DETC201768001