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Analysis of Vibration Characteristics and Failure Behavior of Hot-Dip Galvanizing Immersion Roller System in High-Temperature Zinc Pot

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Abstract

The hot-dip galvanizing pot in a certain steel plant often experiences severe vibrations. In order to investigate the cause of the vibrations in the hot-dip galvanizing line and further clarify the vibration characteristics of the sinking roller system in the high-temperature zinc liquid, this study first used SolidWorks to establish a three-dimensional model of the sinking roller system in the steel plant and then used Ansys Workbench software to perform modal analysis on the hot-dip galvanizing sinking roller system. Considering the complex flow field and loading conditions inside the zinc pot, this article analyzes the vibration characteristics of the sinking roller system under four main external factors, namely, dry mode, wet mode, prestress mode, and thermal stress mode, in a zinc pot, and the natural frequency changes of the sinking roller system under different density fluids, different loading conditions, and different temperatures were analyzed according to the actual working conditions. The calculation results showed that the natural frequency of the sinking roller device significantly decreased, and the order of mode shapes changed when considering the additional mass of the high-temperature zinc liquid. The tension generated by the strip steel had little effect on the natural frequency of the sinking roller device. The thermal stress generated inside the sinking roller system at high temperatures slightly reduced the natural frequency of the sinking roller device in the high-frequency region, but compared to the decrease caused by the inertia effect of the liquid, it was much smaller. The main mode shapes under the action of prestress and thermal stress were almost unchanged compared to the dry mode; in some mode shapes, excessive deformation of the sliding bearings at both ends of the sinking roller system causes roller displacement. This study theoretically analyzed the vibration characteristics of the sinking roller system, compared the influence of the main external loads in the zinc pot on the vibration characteristics of the sinking roller system, and analyzed the possible reasons for the failure of the sliding bearing of the sinking roller system under certain mode shapes, providing a reference for subsequent vibration reduction and optimization design of the sinking roller system.

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Acknowledgments

Thanks for the funding of Research and development of key technologies for improving the stability of the sinking roller system of hot-dip galvanized line (RH2200001473).

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Authors and Affiliations

  1. School of Mechanical Engineering, Anhui University of Technology International Science and Technology Cooperation Base for Intelligent Equipment Manufacturing in Special Service Environments, Ma’anshan, 243032, China

    Sixian Rao, Jun Zhang & Hongkai Wang

  2. Hefei General Machinery Research Institute, Hefei, 230031, China

    Sixian Rao

  3. Taier (Anhui) Industrial Technology Service Co., Ltd., Ma’anshan, 243032, China

    Song Wu & Dongbao Huang

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  1. Sixian Rao
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  2. Jun Zhang
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  3. Hongkai Wang
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  4. Song Wu
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Correspondence to Jun Zhang.

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Rao, S., Zhang, J., Wang, H. et al. Analysis of Vibration Characteristics and Failure Behavior of Hot-Dip Galvanizing Immersion Roller System in High-Temperature Zinc Pot. J Fail. Anal. and Preven. (2024). https://doi.org/10.1007/s11668-024-01906-w

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  • DOI: https://doi.org/10.1007/s11668-024-01906-w

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