Abstract
Increasingly demanding performance standards and operating requirements are driving the growing interest on lubrication technologies in gear transmission systems. Optimized gear lubrication methods and lubricant compositions are necessary to meet the industrial challenges of higher load, speed, temperature and performance expectations in multiple powertrain applications, including automotive, aeronautical and marine. Numerous theoretical and experimental studies have been dedicated to gear lubrication, especially on lubrication modelling and composition of lubricants. Improvements on lubrication methods and conditions can reduce friction, suppress wear and scuffing, and increase gear flank capacity and fatigue life. In order to compile and categorize key investigations in an expansive field with substantial recent research, this work reviews gear lubrication papers with focus on gear efficiency, contact fatigue and dynamics. Furthermore, some accompanying results obtained by the authors are included.
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