Wedge-shaped lyophilic pattern on superlyophobic surface for unidirectional liquid guidance and lubrication enhancement
TRIBOLOGY INTERNATIONAL(2024)
摘要
Effective maintenance of lubricants within the frictional interface is of great importance for the long-life operation of mechanical components. This paper proposes a wedge-shaped lyophilic groove with secondary structures on superlyophobic surfaces to achieve unidirectional guidance of liquid droplets. The experimental studies demonstrate its rapid and long-distance unidirectional self-driven spreading on water and oil droplets. Then, wedge-shaped lyophilic grooves were designed on non-contact area of friction pair to guide lubricant. Relatively lower and more stable friction coefficients were achieved. Further analysis reveals that wedge-shaped grooves restrict the drainage of liquid lubricants. The results of bearing experiments show that designing lyophilic wedgeshaped grooves in the non-contact area of the rolling bearing can effectively reduce the temperature rise of the outer ring.
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关键词
Wedge-shaped lyophilic groove,Liquid unidirectional guidance,Lubricant restriction,Friction coefficient
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