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Design Example: Deciding Thickness of Lubricating Fluid in a Shaft01:23

Design Example: Deciding Thickness of Lubricating Fluid in a Shaft

215
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation.
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular velocity...
215

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Updated: Nov 24, 2025

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Infinite Approaching Superlubricity by Three-Dimensional Printed Structures.

Yu Zhao1, Hui Mei1, Peng Chang1

  • 1Science and Technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an Shaanxi 710072, P.R. China.

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|December 28, 2020
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Summary

Three-dimensional (3D) printing enables custom lubrication structures across scales. This technology advances superlubricity research by creating complex, multifunctional designs from micro to macro dimensions.

Keywords:
bioinspired lubrication structuresgeometric lubrication structureslubrication performancemacroscalemicronanoscalestructural lubricationsuperlubricitythree-dimensional printing

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Area of Science:

  • Tribology
  • Materials Science
  • Additive Manufacturing

Background:

  • Three-dimensional (3D) printing offers advanced capabilities for designing complex lubrication structures.
  • Superlubricity research has traditionally been confined to specific conditions and scales.
  • 3D printing facilitates the creation of multiscale, multifunctional lubrication systems.

Purpose of the Study:

  • To review recent advancements in 3D printing for structural lubrication.
  • To highlight the design and performance of geometric and bioinspired lubrication structures.
  • To summarize material requirements, advantages, disadvantages, and applications of 3D printing techniques.

Main Methods:

  • Literature review focusing on 3D printing in lubrication.
  • Analysis of geometric and bioinspired lubrication structures.
  • Summary of material properties and 3D printing methods.

Main Results:

  • 3D printing enables high customization and rapid prototyping of lubrication structures.
  • Multiscale 3D printed structures are key to achieving superlubricity.
  • Various 3D printing techniques have distinct material requirements and applications.

Conclusions:

  • 3D printing is a promising approach for developing advanced lubrication structures.
  • Future research should focus on design strategies and manufacturing processes for 3D printed lubrication.
  • The technology holds potential for achieving superlubricity across diverse scales.