ABSTRACT

Heat generation due to friction at the gear contact interface is a parasitic energy loss and may require designers to include active cooling systems further decreasing the net usable energy. It is known that changing the surface roughness of the mating gear flanks influences friction in the contact. Presenting different surface finishes to the contact directly influences the amount of asperity interaction. Gear designers and manufacturers must carefully balance costs associated with surface finishing processes while achieving target goals for transmission design. This study utilizes a closed form model to predict friction in mixed lubrication contact conditions as well as gear mechanical power loss under a wide variety of surface finish pairings for several operating conditions consistent with automotive applications.

Authors: Isaac Hong, Emily Aneshansley, David Talbot

Heat generation due to friction at the gear contact interface is a parasitic energy loss and may require designers to include active cooling systems further decreasing the net usable energy. It is known that changing the surface roughness of the mating gear flanks influences friction in the contact. Presenting different surface finishes to the contact directly influences the amount of asperity interaction. Gear designers and manufacturers must carefully balance costs associated with surface finishing processes while achieving target goals for transmission design. This study utilizes a closed form model to predict friction in mixed lubrication contact conditions as well as gear mechanical power loss under a wide variety of surface finish pairings for several operating conditions consistent with automotive applications.

ISBN: 978-1-64353-122-9