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Related Concept Videos

Contact Angle01:13

Contact Angle

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When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
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Design Example: Deciding Thickness of Lubricating Fluid in a Shaft01:23

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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.
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Dry Friction01:30

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Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
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Related Experiment Video

Updated: May 31, 2025

Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
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Sensor for a Solid-Liquid Tribological System.

Ruize Zhang1, Zeyang Yu1, Zhikai Fan1

  • 1School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.

Sensors (Basel, Switzerland)
|January 25, 2025
PubMed
Summary
This summary is machine-generated.

This review covers sensors for monitoring solid-liquid lubrication systems. It details sensors for lubricant condition, friction, and wear, aiding intelligent system design.

Keywords:
acousticcoatingopticalsensorssolid–liquid lubrication

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Area of Science:

  • Tribology and Mechanical Engineering
  • Materials Science and Engineering

Background:

  • Solid-liquid lubrication systems are crucial for enhancing tribological performance and wear resistance.
  • Active control of tribological behavior requires accurate monitoring of lubrication system conditions.

Purpose of the Study:

  • To provide a fundamental understanding of sensors for monitoring lubricant condition, friction, and wear.
  • To detail sensors suitable for engineering applications in intelligent lubrication systems.

Main Methods:

  • Comprehensive review of existing literature on sensors for lubrication systems.
  • Categorization and detailed introduction of sensors based on their application in monitoring lubricant properties, friction, and wear.

Main Results:

  • Identification of various sensor types applicable to solid-liquid lubrication systems.
  • Detailed description of sensor functionalities for assessing lubricant health and tribological parameters.

Conclusions:

  • Accurate monitoring via suitable sensors is fundamental for intelligent lubrication systems.
  • This review offers a technical overview to guide researchers in selecting and implementing sensors for advanced lubrication system design.