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Journal of Zhejiang University SCIENCE A

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Study on the transient wear behavior of multiple groove water-lubricated bearings under mixed lubrication


Author(s):  Da JIN, Yan-feng HAN, Guo XIANG, Jia-xu WANG

Affiliation(s):  College of Mechanical Engineering, Chongqing University, Chongqing, 400044, China; more

Corresponding email(s):  fyh-0220@163.com

Key Words:  Water-lubricated bearings; Mixed lubrication; Friction and wear; Transient analysis; Numerical model


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Da JIN, Yan-feng HAN, Guo XIANG, Jia-xu WANG. Study on the transient wear behavior of multiple groove water-lubricated bearings under mixed lubrication[J]. Journal of Zhejiang University Science A, 1998, -1(1): .

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Abstract: 
A transient wear and mixed lubrication coupled model based on the friction fatigue concept is developed, and the transient tribological performance of multiple groove water-lubricated bearings is studied based on that model. In the model, the wear depth distribution is incorporated into the lubrication gap to evaluate the transient coupling effects between wear and mixed lubrication behavior. To demonstrate the effectiveness of the model, validation with results in the literature is carried out. A series of numerical calculations is done to represent the performance of mixed lubrication evolutions over the operating time, including wear rate, worn surface profile, asperity contact, fluid pressure distribution, etc. The simulation results reveal that transient wear behavior has a significant effect on the distribution tendency of lubrication performance. Wear mainly appears at the edges of bearings in early operation and gradually moves towards a central position with time. In addition, when the external load exceeds a certain range, the accumulated worn geometry increases the asperity contact load. The numerical research also demonstrates that the wear and mixed-EHL (elastohydrodynamic lubrication) performances are significantly affected by the input parameters, for instance, the radius clearance (C), boundary friction coefficient (μ), and surface roughness (σ).

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