Realization of smooth motion of machines through lubrication technology.
Monozukuri (Saitama University Research Seed Collection 2025-27 p.68)
Keywords: Tribology, friction, lubrication, dynamics, vibration, functional materials
We are engaged in research aimed at achieving smooth motion of machine moving parts to contribute to the high efficiency (energy saving) and improved quietness of machines. To enhance machine efficiency, we have developed an experimental device that utilizes optical interference to measure the oil film thickness formed between contact surfaces with a resolution of 0.1 nm (the length of a single molecule of fatty acid additive is about 2 nm), in order to reduce friction losses in moving parts. This supports the creation of lubrication systems using new materials and the development of new lubricants. Additionally, to improve the quietness of machines, we have established a vibration control design method focusing on the magnitude and direction of frictional forces to suppress vibrations and noise generated by friction, and we are considering its application to automotive-related machine components where the demand for quietness is increasing.
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Chiharu Tadokoro, Associate Professor Graduate School of Science and Engineering, Department of Mechanical Science, Human Support Engineering Area 【Recent Research Themes】 ● Establishment of oil film thickness distribution measurement method ● Establishment of lubrication condition monitoring technology for mechanical elements ● Construction of a friction vibration simulator
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【Appeal Points to the Industry】 ● Oil film thickness measurement technology utilizing light interference ● In-situ observation technology for friction surfaces ● Design technology to suppress friction vibrations and friction noise 【Examples of Practical Application, Case Studies, and Utilization】 ● Demonstration of a smart lubrication system utilizing autonomous viscosity changes in liquid crystals ● Demonstration of achieving both low friction and high sealing performance with polymer brushes ● Visualization of the adsorption film formation process of lubricant additives ● Application of vibration suppression design to mechanical elements involving friction
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Friction Vibration Suppression Testing Device
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.