In this work, a mixed lubrication model, applicable to cam-roller contacts, is presented. The model takes into account non-Newtonian, thermal effects, and variable roller angular velocity. Mixed lubrication is analyzed using the load sharing concept, using measured surface roughness. Using the model, a quasi-static analysis for a heavily loaded cam-roller follower contact is carried out. The results show that when the lubrication conditions in the roller-pin contact are satisfactory, i.e., low friction levels, then the nearly “pure rolling” condition at the cam-roller contact is maintained and lubrication performance is also satisfactory. Moreover, non-Newtonian and thermal effects are then negligible. Furthermore, the influence of roller-pin friction coefficient on the overall tribological behavior of the cam-roller contact is investigated. In this part, a parametric study is carried out in which the friction coefficient in the roller-pin contact is varied from values corresponding to full film lubrication to values corresponding to boundary lubrication. Main findings are that at increasing friction levels in the roller-pin contact, there is a sudden increase in the slide-to-roll ratio (SRR) in the cam-roller contact. The value of the roller-pin friction coefficient at which this sudden increase in SRR is noticed depends on the contact force, the non-Newtonian characteristics, and viscosity–pressure dependence. For roller-pin friction coefficient values higher than this critical value, inclusion of non-Newtonian and thermal effects becomes highly important. Furthermore, after this critical level of roller-pin friction, the lubrication regime rapidly shifts from full film to mixed lubrication. Based on the findings in this work, the importance of ensuring adequate lubrication in the roller-pin contact is highlighted as this appears to be the critical contact in the cam-follower unit.
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January 2019
Research-Article
A Mixed-TEHL Analysis of Cam-Roller Contacts Considering Roller Slip: On the Influence of Roller-Pin Contact Friction
Shivam S. Alakhramsing,
Shivam S. Alakhramsing
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
e-mail: s.s.alakhramsing@utwente.nl
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
e-mail: s.s.alakhramsing@utwente.nl
Search for other works by this author on:
Matthijn B. de Rooij,
Matthijn B. de Rooij
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Search for other works by this author on:
Aydar Akchurin,
Aydar Akchurin
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Search for other works by this author on:
Dirk J. Schipper,
Dirk J. Schipper
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Search for other works by this author on:
Mark van Drogen
Mark van Drogen
Central Laboratory Metals,
DAF Trucks N.V.,
P.O. Box 90065,
Eindhoven 5600 PT, The Netherlands
DAF Trucks N.V.,
P.O. Box 90065,
Eindhoven 5600 PT, The Netherlands
Search for other works by this author on:
Shivam S. Alakhramsing
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
e-mail: s.s.alakhramsing@utwente.nl
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
e-mail: s.s.alakhramsing@utwente.nl
Matthijn B. de Rooij
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Aydar Akchurin
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Dirk J. Schipper
Laboratory for Surface Technology and
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Tribology,
Faculty of Engineering Technology,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Mark van Drogen
Central Laboratory Metals,
DAF Trucks N.V.,
P.O. Box 90065,
Eindhoven 5600 PT, The Netherlands
DAF Trucks N.V.,
P.O. Box 90065,
Eindhoven 5600 PT, The Netherlands
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received February 12, 2018; final manuscript received July 23, 2018; published online August 24, 2018. Assoc. Editor: Longqiu Li.
J. Tribol. Jan 2019, 141(1): 011503 (15 pages)
Published Online: August 24, 2018
Article history
Received:
February 12, 2018
Revised:
July 23, 2018
Citation
Alakhramsing, S. S., de Rooij, M. B., Akchurin, A., Schipper, D. J., and van Drogen, M. (August 24, 2018). "A Mixed-TEHL Analysis of Cam-Roller Contacts Considering Roller Slip: On the Influence of Roller-Pin Contact Friction." ASME. J. Tribol. January 2019; 141(1): 011503. https://doi.org/10.1115/1.4040979
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