Gap size effect on the tribological characteristics of the roller for deep-sea mining robot |
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| Authors: | Jae-Won Oh Hyung-Woo Kim Sup Hong Ki-Young Sung Dae-Sung Bae |
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| Institution: | 1. Technology Center for Offshore Plant Industries, Korea Research Institute of Ships and Ocean Engineering, Yuseong-gu, Daejeon, Korea;2. Department of Mechanical Engineering, Hanyang University, Seongdong-gu, Seoul, Korea;3. Department of Mechanical Engineering, Hanyang University, Seongdong-gu, Seoul, Korea |
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| Abstract: | To design the deep-sea mining robot, it is essential to analyze the tribological characteristics of its roller. In this study, we introduced the dynamic simulation model to analyze the tribological characteristics of the roller for deep-sea mining robot, considering the temperature, viscosity, viscous damping force, and gap size between the inner and outer rib seals. Effective viscosity changes with gap size in micro/nanoscale while the effective viscosity is equal to the kinematic viscosity in macroscale. For the stable operation of the roller, the effective viscosity must be less than the critical viscosity. As the gap size decreases, the effective viscosity increases while the critical viscosity decreases. This study shows that the gap size between the inner and outer rib seals of roller is the most dominant factor in designing the roller for deep-sea mining robot to use at relatively low temperatures that are found in the deep-sea environments. |
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| Keywords: | Deep-sea mining robot effective viscosity gap size effect tribological characteristics |
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