Wear prediction considering dynamic load for spur gear in mixed elastohydrodynamic lubrication. (March 2023)

• Record Type: Journal Article
• Authors: Xing, Mingcai; Zhou, Changjiang; Li, Yunzhe; Zheng, Ming
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 237:Number 3(2023)
• Page Start: 645
• Page End: 654
• Publication Date: 2023-03
• Subjects: Wear depth -- dynamic load -- contact temperature -- mixed EHL -- spur gears; Tribology -- Periodicals; 621.89
• DOI: 10.1177/13506501221134998
• Languages: English
• ISSNs: 1350-6501

Abstract

In this work, a wear prediction model considering the dynamic load is proposed for spur gears in mixed elastohydrodynamic lubrication (EHL). The dynamic load is calculated by gear dynamic model. Combining gear wear model and dynamic model, the wear depth under the dynamic load is determined and compared with that under quasi-static load. The comparative results show that the maximum wear depth under dynamic load is significantly larger than that under quasi-static load near engaging-in point. The effects of fractional film defect coefficient on wear depth are considerable under dynamic load, which is closely related to gear contact temperature. Furthermore, the effects of surface roughness and gear geometrical parameters on wear depth are studied. The investigation reveals that the wear depth decreases with the increased tooth width, module and pressure angle, but increases with the surface roughness. It illustrates that gear wear depth under the dynamic load can be reduced by optimizing gear geometrical parameters.